CN203777907U - Absorbing and dehumidifying device - Google Patents

Abstract

The utility model relates to a dehumidifying technology and particularly relates to an absorbing and dehumidifying device. The absorbing and dehumidifying device mainly comprises an absorbing dehumidifier in the form of a fixed bed or a rotary bed and the like, a dehumidifying air path, a regenerating loop and water discharging equipment, wherein the dehumidifying air path and the regenerating loop are communicated with the absorbing dehumidifier together; the regenerating loop is provided with a regenerating heater for supplying heat; the water discharging equipment is communicated with the regenerating loop; when a dehumidifying agent in the absorbing dehumidifier absorbs humidity and saturates, the regenerating loop is used for heating and regenerating the dehumidifying agent, then high-heat and humid gas is discharged to the outside or condensed dewatering is implemented for the high-heat and humid gas by a condenser, and finally cooling treatment is implemented for the absorbing dehumidifier so as to prepare for next dehumidifying work. The absorbing and dehumidifying device has the advantages that the defect of high energy consumption in the prior art can be effectively overcome, the energy-saving and environmental-friendly effects are achieved and good dehumidifying effect is achieved.

Description

An adsorption dehumidification device

technical field

The utility model relates to a dehumidification technology suitable for thermal energy, chemical industry, metallurgy, electronics, machinery, light industry and other industries, and more specifically relates to an adsorption dehumidification device.

Background technique

Dehumidification technology is often used to process wet gas to obtain dry gas. In addition to the common air dehumidification of human living environment and air dehumidification of various facilities such as factory workshops and warehouses, many industrial sectors often need to dehumidify chemical raw materials, energy gases such as natural gas and coal gas, and various industrial gases for various purposes. Perform dehumidification. For example, in chemical production, it is necessary to dehumidify the feed gas to below the dew point of -60°C to prevent moisture from reducing the activity of the catalyst. In the energy industry, dehumidification of compressed natural gas is mainly to prevent the formation of natural gas hydrate. In the iron and steel industry, it is necessary to Blast furnace blast uses air dehumidification to improve the quality of steel products. Compressed air produced by compressed air stations commonly used in electronics, machinery and other industries must be dehumidified before use. In addition, the purpose of treating wet gas with dehumidification technology is sometimes to collect moisture from the wet gas.

There are currently three main types of industrial dehumidification equipment: refrigeration, adsorption, and absorption. Freezing and dehumidification is to cool the gas below the dew point to condense and precipitate moisture. The advantage of refrigeration dehumidification is that the dehumidification capacity is large, but the disadvantage is that the price of refrigeration equipment is high, and the power consumption is large. When the temperature is lower than about 15°C, the dehumidification capacity is obviously reduced, frost is easy to form, and the refrigeration compressor is noisy. Absorption and dehumidification is to use liquid hygroscopic agents such as triethylene glycol and lithium chloride solution to absorb water. The disadvantage is that it is more corrosive. Adsorption dehumidification is the use of solid hygroscopic agents to absorb and remove moisture in the gas. Silica gel is the most commonly used hygroscopic agent, and its moisture absorption capacity can reach 40% of its own weight. Other moisture absorbents include zeolite molecular sieves, activated alumina, calcium chloride, potassium chloride, lithium chloride, etc., which are usually in the form of particles or bonded to the substrate or support material by bonding, sol-gel, etc. layered etc. The adsorption dehumidifier is a dehumidification device containing a solid hygroscopic agent. The loading capacity of the solid hygroscopic agent can range from several kilograms to hundreds of kilograms. Its basic forms include fixed bed, moving bed, fluidized bed, and rotating bed (such as Wheel), etc., its special form is multi-stage moving bed type, multi-stage fluidized bed type, double fluidized bed type, etc. Before 1900, industrial-scale fixed-bed adsorption dehumidifiers had been used in the dehumidification of air and industrial gases. Around 1960, rotating bed adsorption dehumidifiers began to be used for air humidity conditioning in residential and industrial facilities. The advantage of adsorption dehumidification is that the equipment cost is low, and the dehumidification effect is better when the temperature is lower. The disadvantage is that the heating and regeneration process after the moisture absorbent is saturated consumes a lot of energy.

The main difficulties in industrially heating and regenerating moisture absorbents are:

(1) The heat of desorption (the heat required for moisture to desorb from the moisture absorbent into the gas phase) is greater than the latent heat of evaporation (the heat required for the evaporation of liquid water). For silica gel, the heat of desorption is about 2500 kJ/kg-water. Regenerative heating must provide enough heat to meet the endothermic demand of moisture desorption.

(2) Moisture absorbent is a poor conductor of heat. For example, the thermal conductivity of silicone is only 0.14 W/m·K (equivalent to the thermal conductivity of asbestos, a heat insulating material). The heating of the moisture absorbent particles is a relatively slow process.

(3) Moisture absorbents are mostly microporous materials. For example, the average micropore diameter of silica gel is 20 Å, the micropore volume is 0.6-1 cm ³ /g, and the internal surface area is 600-800 m ² /g. The moisture absorbed by the hygroscopic agent is stored in these micropores. When heating and regenerating, this moisture must diffuse outward from the micropores to enter the gas phase. Micropore diffusion is an extremely slow process and is usually the rate-determining step in dehydration regeneration of moisture absorbents.

(4) The regeneration temperature is generally higher than 100°C and lower than the heat-resistant temperature of the moisture absorbent. For example, the regeneration temperature of silica gel is about 100-150°C, and the heat-resistant temperature is about 200-250°C (the regeneration temperature and heat-resistant temperature of different moisture absorbent products are different). When regenerating, try to be even. If the local overheating exceeds the heat-resistant temperature, the structure of the hygroscopic agent will be destroyed and the performance will be reduced.

For a long time, the regenerative heating method commonly used in industry is the hot air regeneration method (or hot air regeneration method, hot gas regeneration method). For example, the regeneration process of a fixed-bed air dehumidifier is roughly as follows: the air heated to about 150°C is passed into the dehumidifier to gradually increase the temperature of the moisture absorbent bed to reach the regeneration temperature of about 100°C. The preheating process generally takes 0.5 to 1 hour; after the moisture absorbent bed reaches the regeneration temperature, continue to pass hot air at 150°C to provide the heat required for moisture desorption. The hot air at 150°C releases sensible heat to the moisture absorbent bed and then cools down to about 80°C. The moisture desorbed from the bed is carried by the hot air at about 80°C and discharged to the outside. The desorption process generally takes more than 2 hours. The advantage of the hot air regeneration method is that the moisture absorbent bed can be heated more uniformly, but the disadvantage is that a large amount of hot air must be introduced to provide sufficient heat, and exhaust gas is continuously discharged during the entire regeneration process, so energy consumption is relatively large.

Contents of the invention

The utility model aims at overcoming the disadvantage of large energy consumption in the above-mentioned prior art, and the utility model provides an adsorption dehumidification solution for removing moisture from gas with low energy consumption.

The solution has the necessary technical features of cyclic heating, cyclic dehydration and regeneration, water discharge, and cooling.

In order to solve the above technical problems, the technical solution adopted by the utility model is: an adsorption dehumidification device of the utility model, which includes a dehumidification gas path, and the dehumidification gas path is connected with the inlet of the gas to be dehumidified, the adsorption dehumidifier, and the outlet of the dehumidified gas. There are also several valves on the dehumidification gas path. In the prior art, a dehumidification fan is generally installed on the dehumidification gas path. agent, the wet gas can be dried, and the wet gas is discharged from the dehumidified gas outlet after being dried and dehumidified. In addition, it also includes a regeneration circuit, a regeneration heater, a circulation fan, and drainage equipment. The circulation fan and the regeneration heating The device is arranged on the regeneration circuit, the circulation fan can promote the flow of gas on the regeneration circuit, and the regeneration heater enables the flowing gas on the regeneration circuit to be heated by the regeneration heater. With the continuous operation of the dehumidification gas circuit, the moisture absorbent in the adsorption dehumidifier is gradually saturated. In order to heat and regenerate the moisture absorbent, it can be heated by the hot gas in the regeneration circuit. Therefore, the regeneration circuit is connected to the adsorption At the input end and output end of the dehumidification device, the gas can circulate and exchange heat between the regeneration circuit and the adsorption dehumidifier, and finally the moisture absorbent inside the adsorption dehumidifier can be dehydrated and regenerated. In addition, since there are several valves on the dehumidification gas path, when the adsorption dehumidification device performs dehumidification work, the valves can be used to separate the dehumidification gas path and the regeneration circuit, and the regeneration circuit does not work; when the adsorption dehumidification device performs regeneration work At this time, the regeneration circuit can be connected to the adsorption dehumidifier by opening the valve, so that the gas can circulate between the regeneration circuit and the adsorption dehumidifier. The dehumidified gas outlet ensures that the adsorption dehumidifier can be fully dehydrated and regenerated. The gas circulates between the moisture absorbent and the regeneration heater to transfer the heat provided by the regeneration heater to the moisture absorbent to maintain the regeneration temperature of the moisture absorbent. After the moisture absorbent particles are heated, the moisture diffuses to the gas phase, and between the moisture absorbent and the regeneration heater The moisture content of the circulating gas that circulates between cycles increases gradually.

It should be noted that the "adsorption dehumidifier" includes all types of adsorption dehumidifiers. For example, when the adsorption dehumidifier is a single tower fixed bed type, the adsorption dehumidification device is an intermittent dehumidification device that performs dehumidification and regeneration alternately; when the adsorption dehumidifier is a rotating bed type, the adsorption dehumidification device It is a continuous dehumidification device.

Since the drainage equipment is connected with the regeneration circuit, and further, the drainage equipment includes an exhaust port or a condenser, and the exhaust port or condenser is connected with the regeneration circuit, and the condenser is also provided with condensed water discharge Therefore, during the cycle dehydration period, when the moisture content of the circulating gas reaches a certain level, the opening of the valve can be adjusted to intermittently or continuously allow part of the hot and humid gas circulating in the regeneration circuit to flow into the condenser, and the hot and humid gas After passing through the condenser, the water vapor contained in the gas is condensed, and the condensed water is discharged/collected from the condensed water outlet, and the hot and humid gas is thus dried; the regeneration circuit continues to perform the above-mentioned cycle dehydration regeneration and water discharge operations at the same time until After no condensed water is discharged, proceed to the next cooling operation. When the adsorption dehumidifier is heated and regenerated, the heat transfer work of the regeneration heater can be stopped, so that the gas on the regeneration circuit can continue to circulate between the condenser and the adsorption dehumidifier In this way, the adsorption dehumidifier is cooled, or the cooling gas is directly passed into the dehumidification gas path to directly cool the adsorption dehumidifier, and the adsorption dehumidifier is cooled to normal temperature and then enters the next operation cycle. It should be noted that the "drainage equipment" in the present utility model refers to equipment that discharges water or water vapor.

Preferably, the interior of the adsorption dehumidifier is composed of several moisture absorbent beds separated from each other, and the regeneration heater includes heat exchange tubes, and the heat exchange tubes pass through the interior of the adsorption dehumidifier and avoid all Desiccant bed. During the heating and regeneration operation, the heating medium can be passed into the heat exchange tube, and the cooling medium can be passed into the heat exchange tube during the dehumidification operation, so it can additionally provide a treatment method for heating regeneration and cooling of the adsorption dehumidifier , making the adsorption dehumidification device more practical.

Preferably, the regeneration circuit is arranged inside the adsorption dehumidifier, that is, the regeneration circuit connects the input end and the output end of the adsorption dehumidifier from the inside of the adsorption dehumidifier, and is composed of two interconnected cavities inside the adsorption dehumidifier, The dehumidification fan drives the gas to circulate between the two cavities, and the moisture absorbent bed is arranged in the two cavities, and the regenerative heater includes heat exchange tubes, and the heat exchange tubes pass through the inside the adsorptive dehumidifier and avoid the absorbent bed. Its beneficial effect is that external circulation pipes and valves are omitted, thereby reducing heat loss. The regenerative heater includes heat exchange tubes, and the heat exchange tubes pass through the interior of the adsorption dehumidifier and avoid the For the moisture absorbent bed, heating medium can be passed into the heat exchange tubes during heating and regeneration operation, and cooling medium can be introduced into the heat exchange tubes during dehumidification operation.

Further, since the above-mentioned adsorption dehumidification device works intermittently, that is, because there is only one adsorption dehumidification device and one dehumidification gas path in the dehumidification device, when the adsorption dehumidification device needs to be heated and regenerated, it must first pass through the valve. Close the air supply port of the dehumidification fan and the dehumidified gas outlet, so that the dehumidification gas circuit cannot carry out the dehumidification work, and then the adsorption dehumidifier can be heated and regenerated through the regeneration circuit. During the heating and regeneration period, the adsorption dehumidification device cannot carry out the dehumidification work. The number of dehumidification gas paths is at least two, and each dehumidification gas path is connected in parallel with each other and separated by the plurality of valves. The regeneration circuit is respectively connected to the adsorption dehumidifier on each dehumidification gas path, and the gas can be separately Any one of the adsorption dehumidifiers circulates and exchanges heat with the regeneration circuit. The purpose is that when one dehumidification gas circuit is working, the other dehumidification gas circuit can be temporarily closed by the valve, and the dehumidification gas circuits are isolated from each other, that is, the adsorption dehumidifiers are also isolated from each other. Therefore, when one dehumidification gas circuit performs dehumidification work At this time, the regeneration circuit is isolated by closing the relevant valve, and the other dehumidification gas circuit is connected to the regeneration circuit separately by opening the relevant valve, and then the heating and regeneration work is carried out. According to the above method, each adsorption dehumidifier can perform dehumidification work alternately And heating regeneration, so that the adsorption dehumidification device can continue to perform dehumidification work without interruption, which is more advanced.

Furthermore, although it involves the alternate switching work of two adsorption dehumidifiers, the above-mentioned adsorption dehumidification device capable of continuous dehumidification work is still lacking in environmental protection and energy saving. First of all, it must be recognized that the adsorption dehumidifier performs dehumidification work and gradually reaches saturation. Afterwards, its temperature is not high, and the temperature is raised from normal temperature to 100°C in the subsequent heating and regeneration process. Every heating and regeneration work requires the regeneration heater to consume a lot of energy; on the other hand, after the regeneration is completed, the The adsorption dehumidifier has a temperature of about 100°C, and it needs to be cooled to room temperature before it can be put into dehumidification operation. In the existing technology, cold air is passed into the adsorption dehumidifier after regeneration is completed during the cooling operation, and the hot air thus generated is directly discharged to the outside. , the sensible heat of the adsorption dehumidifier is completely wasted; combined with the above reasons, the dehumidification gas path is at least three, and there are also heat recovery gas paths connected between each adsorption dehumidifier. Similarly, in practical applications, the heat recovery gas path can be A circulating fan is arranged to promote the gas to circulate between the two adsorption dehumidifiers through the heat recovery gas path, so that the two adsorption dehumidifiers can perform heat exchange. Therefore, the connection between the two adsorption dehumidifiers through the heat recovery gas path can enable heat exchange between the two adsorption dehumidifiers, especially for the adsorption dehumidifier that has just completed heating regeneration and the one that is about to undergo heating regeneration. The heat exchange between the adsorption dehumidifiers transfers the high heat of the adsorption dehumidifiers that have just completed heating and regeneration to the adsorption dehumidifiers that are about to be heated and regenerated, so that the adsorption dehumidifiers that are about to be heated and regenerated are fully preheated before heating and regeneration. The remaining one dehumidification gas path continues to perform dehumidification work. Therefore, more than three dehumidification gas paths can be alternately switched in turn according to the above method. Therefore, under the condition that the dehumidification device can continue to perform dehumidification work, the waste heat can also be fully utilized. The energy required by the regenerative heater is reduced, the energy consumption of the regenerative heating of the dehumidification device is reduced, and the device is environmentally friendly and energy-saving.

Further, the adsorption dehumidifier is a desiccant rotor, the dehumidification gas path is connected to the moisture absorption area of the desiccant rotor, and the regeneration circuit is connected to the regeneration area of the desiccant rotor. It should be noted that, in the prior art, the inside of the dehumidification wheel is made of hygroscopic material, and the surface of the dehumidification wheel is divided into a hygroscopic area and a regeneration area. In the use of the prior art, the interface at one end of the moisture absorption area of the dehumidification wheel is connected to the air supply port of the dehumidification fan, and the interface at the other end is connected to the dehumidified gas outlet, thus forming a Dehumidification gas path. With the rotation of the runner, the part of the runner in the moisture absorption zone turns into the regeneration zone, and the circulation fan in the regeneration circuit runs continuously to make the regeneration gas circulate between the regeneration heater and the regeneration zone, maintain the regeneration temperature in the regeneration zone, and make the rotor The part of the runner that has absorbed moisture entering the regeneration zone is first cyclically heated to raise the temperature, and then dehydrated and regenerated. Then, the part of the gas that has been dehydrated and regenerated returns to the moisture absorption zone with the rotation of the runner. The rotary dehumidification device The advantage is the ability to perform dehumidification and regeneration operations continuously.

Furthermore, in order to further reduce energy consumption, the adsorption dehumidification device of the present invention can also be introduced into the heat pump system in the prior art. The heat pump system is a refrigerant liquid circulation system, and a compressor, a condenser, an expansion valve, an evaporation valve, and a compressor are usually installed in the system. device etc. In this solution, the regeneration heater is a condenser arranged on the heat pump system, so for the regeneration circuit, the condenser on the heat pump system plays the role of a regeneration heater; in addition, the condensation of the regeneration circuit The evaporator is the first evaporator installed on the heat pump system, so it acts as a cooler for the dehumidification gas circuit and the condensation branch of the regeneration circuit.

Further, the technical scheme of coupled operation of the dehumidification wheel and the refrigeration cycle in the prior art is to set the evaporator on the dehumidification gas path before the dehumidification area of the dehumidification wheel, since the dehumidified gas at this place is at normal temperature, the inside of the evaporator The temperature of the refrigerant liquid must be lower than about 10°C, thus causing a large load on the compressor. Therefore, further, the heat pump system is also provided with a second evaporator, and the second evaporator is connected in series with the first evaporator or connected in parallel, the second evaporator is arranged on the dehumidification gas path and is located between the adsorption dehumidifier and the dehumidified gas outlet. After the first evaporator and the second evaporator are connected, they both have the function of absorbing heat, and the second evaporator is located between the adsorption dehumidifier and the dehumidified gas outlet, and can absorb heat from the adsorption dehumidifier or dehumidification gas on the dehumidification gas path. The heat from the runner, and the heat is sent back to the heat pump system. Since the temperature of the gas after passing through the adsorption dehumidifier or the dehumidification runner will rise, the gas will continue to flow through the second evaporator and exchange heat with it, making the refrigerant The liquid temperature can be higher than 10°C, so the load on the compressor is small.

Further, the outlet end of the second evaporator is connected to the inlet end of the adsorption dehumidifier, and the dehumidified gas flowing through the second evaporator can flow back to the adsorption dehumidifier, which can reduce the adsorption dehumidifier. temperature, effectively improving the dehumidification effect.

Further, the regeneration circuit is provided with an air inlet for supplementing the regeneration circuit with circulating gas or adding cooling gas. When the regeneration circuit needs supplementary gas, the valve on the gas charging channel can be opened, and the gas from the outside, or other gas sources, or a part of the gas to be dehumidified or the dehumidified gas in the dehumidification gas circuit can pass through the gas charging channel intermittently or continuously ground supplement into the regeneration loop of the hydronic heating.

Further, the regeneration circuit is connected with an exhaust port for reducing the air pressure of the regeneration circuit. When the dehumidification device is used for air dehumidification, the dehumidification operation is generally at normal pressure. When it is used for the dehumidification treatment of energy gas, chemical raw material gas, and industrial gas, the dehumidification operation is generally under pressurized conditions. During the regeneration operation, the regeneration circuit is circulated The heated gas is the same gas as in the dehumidification operation, and the pressure in the adsorption dehumidifier and the regeneration circuit may increase during the regeneration operation. The pressure increase caused by the conversion to water vapor depends on the pressure rating of the adsorption dehumidifier, regeneration heater, circulation fan, etc. The adsorption dehumidifier and/or regeneration circuit may be too high in pressure and need to be decompressed. In this case A pressure regulating tube can be used to connect the regeneration circuit with the outside world. There is a regulating valve on the exhaust pipe. Opening the regulating valve can discharge part of the circulating gas. The forms that can be used include manual valves, solenoid valves, self-operated pressure regulating valves or The valve controlled by PLC is operated according to the signal of the pressure and/or humidity sensor. When dehumidifying the air, the exhaust port of the pressure regulating pipe is opened to the atmosphere, or when dehumidifying treatment of energy gas, chemical raw material gas and industrial gas, the valve is adjusted. The exhaust port of the pressure pipe can lead to the recovery equipment.

Based on the same necessary technical features as the above-mentioned solution, and to further expand the applicability of the above-mentioned solution, the utility model also discloses another adsorption dehumidification device, which includes a dehumidification gas path, and the dehumidification gas path is connected to the inlet of the gas to be dehumidified, the adsorption dehumidification device, dehumidified gas outlet, the dehumidified gas path is also provided with several valves, and also includes a regeneration circuit, a regeneration heater, and drainage equipment, the regeneration heater is set on the regeneration circuit, and the regeneration circuit is connected to Through the input and output ends of the adsorption dehumidifier, the regeneration circuit is arranged so that the heat of the regeneration heater drives the gas to circulate on the regeneration circuit, that is, a pressure difference is formed on the regeneration circuit, so that the gas can be controlled It flows from a position with higher air pressure to a position with lower air pressure, realizing the natural convection heat exchange method, so not only the circulation fan is omitted, but also has the function of heating and regenerating the adsorption dehumidifier. When the heater generates heat at the same time, it can also be used. Promote the increase of the internal pressure of the adsorption dehumidifier, discharge the gas and send it to the condensation branch connected to the regeneration circuit, and carry out condensation and drying treatment through the condenser. Likewise, since the drainage equipment is in communication with the regeneration circuit, and the drainage equipment includes an exhaust port or a condenser, and the exhaust port or condenser is connected to the regeneration circuit, during dehydration cycle, when the circulating gas contains When the humidity reaches a certain level, the opening of the valve can be adjusted to intermittently or continuously allow part of the hot and humid gas circulating in the regeneration circuit to flow into the condenser, and after the hot and humid gas flows through the condenser, the water vapor contained in the gas is condensed , the condensed water is discharged/collected from the condensed water discharge port of the condenser, and the hot and humid gas is thus dried; the regeneration circuit continues to perform the above-mentioned cycle dehydration regeneration and water discharge operations at the same time until no condensed water is discharged before proceeding to the next step Cooling operation, when the adsorption dehumidifier is heated and regenerated, the heat transfer work of the regeneration heater can be stopped, and the gas on the regeneration circuit can continue to circulate between the condenser and the adsorption dehumidifier to cool the adsorption dehumidifier, or directly to the Cooling gas is passed through the dehumidification gas path to directly cool the adsorption dehumidifier, and the adsorption dehumidifier enters the next operation cycle after cooling down to normal temperature.

Preferably, the regeneration circuit is composed of two interconnected cavities inside the adsorption dehumidifier, the two cavities are provided with a moisture absorbent bed, and the regeneration heaters are respectively arranged in the two cavities And avoid the absorbent bed.

Based on the same necessary technical features as the above-mentioned solution, and to further expand the applicability of the above-mentioned solution, the utility model also discloses another adsorption dehumidification device, including the gas inlet to be dehumidified, the adsorption dehumidifier, the dehumidified gas outlet, and regeneration. circuit, regenerative heater, circulating fan, drainage equipment, and annular air path, the number of the adsorption dehumidifiers is several and connected in series on the annular air path, and the exhaust ends of each adsorption dehumidifier are respectively connected to the The outlet of the dehumidified gas, the inlet port of each adsorption dehumidifier is respectively connected to the inlet of the gas to be dehumidified, valves are arranged between each adsorption dehumidifier, the circulation fan and regeneration heater are arranged on the regeneration circuit, the The regeneration circuit is respectively connected to the input and output ends of the adsorption dehumidifiers, the circulation fan drives the gas to circulate on the regeneration circuit, the drainage device is connected to the regeneration circuit, and the drainage device includes an exhaust port or a condenser, The exhaust port or condenser is connected to the regeneration circuit.

Compared with the prior art, the utility model has the following beneficial effects:

(1) Heating cycle heating:

In the hot air regeneration method of the prior art, the sensible heat loss of exhaust gas during the preheating and heating up stage accounts for about 40% of the heat provided by the regeneration heater. The adsorption and dehumidification device of the utility model does not need to discharge exhaust gas during the cyclic heating and temperature raising process, thereby avoiding the sensible heat loss of the exhaust gas. The only heat loss in the process of cyclic heating is the heat loss of the outer surface of the equipment. When the equipment has good insulation, the heat loss is very small. Therefore, almost all the heat provided by the regenerative heater in the preheating and heating up stage of the utility model has been effectively utilized.

(2) Cycle dehydration regeneration:

In the hot air regeneration method of the prior art, the exhaust gas temperature in the dehydration regeneration stage after reaching the regeneration temperature is generally 60-80°C, and the moisture content of the exhaust gas is generally below 45g/kg-dry air. That is to say, every time 45g of water is discharged, 1kg of exhaust gas at 60-80°C is discharged, and the heat loss is relatively large. This is mainly because the heat provided by the sensible heat of the air to the absorbent bed is not enough to desorb more moisture. For example, the outside air at 25°C, moisture content 15g/kg, relative humidity 75% is heated to 150°C by a regenerative heater and then passed into the desiccant bed, and the hot air at 150°C releases sensible heat to the desiccant bed and cools down to about 80 After ℃, it carries the moisture desorbed from the hygroscopic agent and discharges to the outside. The sensible heat of air cooling from 150°C to 80°C is about 70 kJ/kg-dry air (the heat loss from the outer surface of the equipment accounts for about 2.5%), and the desorption heat of moisture is 2500 kJ/kg-water, therefore, under the above parameter conditions, the sensible heat released by 1 kg of hot air to the desiccant bed is only enough to desorb 27 g of moisture at most, plus the 15g/kg of moisture originally contained in the hot air, the discharged The moisture content of the exhaust gas is 42g/kg. Under this parameter state, the sensible heat of the air from 150°C to 80°C is effectively utilized, and the sensible heat of the air below 80°C is wasted as waste heat discharged to the atmosphere, and the energy utilization efficiency is only 56%. For a long time, those skilled in the art have believed that after using hot air to regenerate the moisture absorbent, the hot air carries the desorbed moisture, so a large amount of hot air at a temperature of about 80 ° C must be discharged to the atmosphere immediately, and it is also recognized that in the hot air regeneration method Only about half of the heat provided by the regenerative heater is effectively used, and the regeneration energy consumption is large, but the efforts to solve this problem in the past were limited to how to recover the sensible heat and latent heat of the regeneration exhaust. The utility model believes that after the hot air regenerates the moisture absorbent, the hot air carries less moisture desorbed from the moisture absorbent, so it does not need to be discharged to the atmosphere immediately, and the gas can be circulated between the moisture absorbent and the regeneration heater to regenerate the moisture. The heat provided by the heater is transferred to the hygroscopic agent, and it is only discharged (or condensed) when the circulating gas reaches a higher moisture content, thus reducing exhaust gas emissions and sensible heat loss. For example: first heat the air at 25°C, moisture content 15g/kg, relative humidity 75% to 150°C with a regenerative heater, moisture content 15g/kg, relative humidity 2.5%, then pass it into the desiccant bed, heat at 150°C The air releases sensible heat to the dehumidifier bed to cool down, and then carries the desorbed moisture when it is discharged from the adsorption dehumidifier. The temperature is 80°C, the moisture content is 42g/kg, and the relative humidity is 13%. 150°C, moisture content 42g/kg, relative humidity 7.5%, and then circulate into the adsorption dehumidifier, and when it is discharged from the adsorption dehumidifier again, the temperature is 80°C, moisture content 69g/kg, relative humidity 20%; so many cycles, The moisture content in the circulating gas gradually increases. When the circulating gas reaches a temperature of 80°C, a moisture content of 150g/kg, and a relative humidity of 40%, when it is discharged to the atmosphere, 1 kg of hot air is discharged to the atmosphere every time 135g of moisture is removed. Compared with the hot air regeneration method in the prior art, when 27 g of water is removed and 1 kg of hot air is discharged, the utility model significantly reduces the exhaust sensible heat loss. Another advantage of adopting the utility model is that the circulating gas contains relatively high water vapor concentration, and the recycling of the latent heat of condensation is relatively easy.

(3) Remove the heat of adsorption:

The heat of adsorption generated during the dehumidification operation can raise the temperature of the hygroscopic agent bed by about 5-10°C, which reduces the dehumidification effect. Especially in the case of high temperature and high humidity, the adsorption and dehumidification capacity may decrease significantly. Examples 2, 7, and 9 given in the detailed description can remove the heat of adsorption and make the dehumidification effect more stable.

(4) Recovery of waste heat:

(a) Recovery of sensible heat and latent heat of regenerative exhaust gas (or cycle gas in this utility model):

The regeneration exhaust parameters of the hot air regeneration method in the prior art are generally: temperature 60-80°C, moisture content below 45g/kg, dew point below 39°C. Under this parameter state, conventional waste heat recovery equipment can only recover about 30% of the sensible heat of the regeneration exhaust, and it is difficult to recover and utilize the latent heat. Moreover, the heat transfer temperature difference is small, and a large heat exchange area is required, which is not economically feasible. The parameters of the circulating gas in the regeneration circuit of the utility model at the outlet of the adsorption dehumidifier are generally: temperature 80°C, moisture content above 150g/kg, dew point higher than 60°C. It is easier to recover the latent heat of water vapor condensation of the circulating gas with conventional waste heat recovery equipment. Embodiments 5, 6, 7 and 9 of the utility model have the advantage of recovering the sensible heat and latent heat of the circulating gas in the regeneration circuit.

(b) Recovery of sensible heat from the desiccant bed after heating regeneration:

After heating and regeneration, the adsorption dehumidifier has a temperature of about 100°C and needs to be cooled to room temperature before it can be put into dehumidification operation. In the prior art, cold air is passed into the regeneration dehumidifier during the cooling operation, and the hot air thus generated is directly discharged to the atmosphere, and the sensible heat of the adsorption dehumidifier is completely wasted. Embodiments 5 and 9 of the present utility model can recover the sensible heat of the adsorption dehumidifier (or the part of the runner that has just completed regeneration) that has just completed regeneration and use it to preheat the next adsorption dehumidifier that will be heated and regenerated (or will be heated The regenerated part of the runner) saves the heat required for regeneration heating.

(c) Recovery of adsorption heat generated during dehumidification operation:

The heat of adsorption makes the temperature rise of the dehumidified gas not large, which is generally difficult to use. In Embodiments 6, 7, and 9 of the present utility model, the temperature difference between the refrigeration/heat pump cycle working fluid and the dehumidified gas can reach 20°C, and part of the heat of adsorption can be recovered. When Example 8 is applied to indoor air dehumidification in low-temperature and high-humidity seasons when both heat supply and dehumidification are required, the heat of adsorption increases the temperature of the indoor air, and the heat of adsorption is actually recycled.

(5) Coupling operation of adsorption dehumidifier and refrigeration or heat pump cycle:

The coupling operation scheme of the dehumidification rotor and the refrigeration or heat pump cycle in the prior art is to arrange the evaporator on the dehumidification gas path before the dehumidification area of the dehumidification rotor. Since the dehumidified gas here is at normal temperature, the temperature of the working medium in the evaporator must be lower than about 10°C, and the load on the compressor is relatively large. In the utility model, the evaporator is arranged on the dehumidified gas path after the dehumidification area of the dehumidification wheel, where the gas temperature is higher than the gas temperature before the dehumidification area of the dehumidification wheel, so the temperature of the working medium in the evaporator can be higher than 10 ℃, the compressor load is small, and the adjustable range is large.

Description of drawings

Fig. 1 is a schematic diagram of a batch type dehumidification device equipped with a condenser in the regeneration circuit of Example 1.

Fig. 2 is a schematic diagram of a batch type dehumidification device with built-in heat exchange tubes in Example 2.

Fig. 3 is a schematic diagram of an intermittent dehumidification device with built-in heat exchange tubes and a circulating fan in Example 3.

Fig. 4 is a schematic diagram of a batch type dehumidification device in the natural convection heat exchange mode of Embodiment 4.

Fig. 5 is a schematic diagram of the rotary wheel type continuous dehumidification device with heat recovery in Example 5.

Fig. 6 is a schematic diagram of a continuous dehumidification device running in combination with a runner and a refrigeration/heat pump cycle in Embodiment 6.

Fig. 7 is a schematic diagram of a continuous dehumidification device with a return air rotor coupled with a refrigeration/heat pump cycle in Embodiment 7.

Fig. 8 is a schematic diagram of a continuous dehumidification device composed of two adsorption dehumidifiers in Embodiment 8.

Fig. 9 is a schematic diagram of the continuous dehumidification device in embodiment 9, which consists of three adsorption dehumidifiers coupled with refrigeration/heat pump cycles.

Fig. 10 is a schematic diagram of a continuous dehumidification device composed of three adsorption dehumidifiers connected in series in Embodiment 10.

Symbol Description:

1. A, B, C adsorption dehumidifier or dehumidification wheel

100 partitions inside the adsorption dehumidifier

101, 102, 103, 104 Moisture absorbent bed in adsorption dehumidifier

105, 106 Regenerative heater in adsorption dehumidifier

107 Circulation fan in adsorption dehumidifier

108 The valve at the inlet end of the gas to be dehumidified by the adsorption dehumidifier

109 Dehumidified gas outlet valve of adsorption dehumidifier

110 External circulation pipeline valve of adsorption dehumidifier

111 Dehumidification wheel moisture absorption zone

112 Dehumidification wheel preheating zone

113 Dehumidification wheel regeneration area

114 Dehumidification wheel cooling zone

2 dehumidification fan

3, 4, 5 circulation fan or blower

301 Air inlet valve of circulation fan 3

302 Exhaust end valve of circulation fan 3

6 regenerative heater

601 Valve on the inlet side of the regenerative heater

602 Outlet valve of regenerative heater

7 condenser

701 Condensed gas inlet valve of condenser

702 Condensed gas outlet valve of condenser

8 regulating valve

901 Compressors for refrigeration or heat pump cycles

902 Condensers for refrigeration or heat pump cycles

903, 904 Expansion valves for refrigeration or heat pump cycles

905, 906 Evaporators for refrigeration or heat pump cycles

907, 908 Check valves for refrigeration or heat pump cycles

909, 910 Regulating valves for refrigeration or heat pump cycles

10 Inlet of gas to be dehumidified

11 Dehumidified gas outlet

12 Heat exchange medium inlet

13 Heat exchange medium outlet

14 Condensate drain

15 air inlet

16, 17 exhaust port

18~63 valves

64 intake manifold

65 Exhaust header

66 Ring air circuit.

Detailed ways

The utility model will be further described below in conjunction with specific embodiments. Wherein, the accompanying drawings are for illustrative purposes only, and represent only schematic diagrams, rather than actual drawings, and should not be construed as limitations on this patent; in order to better illustrate the embodiments of the present utility model, some parts of the accompanying drawings will be omitted , enlargement or reduction, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some known structures and their descriptions in the drawings may be omitted.

In the accompanying drawings of the utility model embodiment, the same or similar symbols correspond to the same or similar parts; The orientation or positional relationship indicated by "right", "vertical", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying A device or element must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the drawings are for illustrative purposes only, and should not be construed as limitations on this patent.

In addition, if there are terms such as "first" and "second", they are used for description purposes only, and cannot be interpreted as indicating or implying relative importance. Those of ordinary skill in the art can understand the above terms according to specific situations specific meaning.

Example 1

As shown in Figure 1, it is a schematic diagram of an intermittent dehumidification device equipped with a condenser in a regeneration circuit of the present invention. The dehumidification device includes an adsorption dehumidifier 1 (with a hygroscopic agent bed 101 composed of hygroscopic agent particles), waiting Dehumidification gas inlet 10, dehumidification gas outlet 11, dehumidification fan 2, circulation fan 3, regeneration heater 6, condenser 7. The gas inlet 10 to be dehumidified, the dehumidifying fan 2, the adsorption dehumidifier 1, and the dehumidified gas outlet 11 are connected through pipelines to form a dehumidified gas path. The adsorption dehumidifier 1, the circulating fan 3, and the regeneration heater 6 are connected through pipelines to form a regeneration circuit; both ends of the condenser 7 are connected to the regeneration circuit through pipelines to form a condensation branch, and the valves 301, 701, and 702 can be used to adjust the flow through Condensed gas flow rate of condenser 7, an operation cycle of the intermittent dehumidification device includes dehumidification and regeneration steps:

(A) Dehumidification: Open the valves 108 and 109, close other valves, and run the dehumidification fan 2, so that the gas to be dehumidified entering through the inlet 10 flows through the adsorption dehumidifier 1, and the moisture in the gas is absorbed and removed by the hygroscopic agent bed 101, and the dehumidification is completed. The gas is discharged through the outlet 11, and when the moisture absorbent bed 101 is nearly saturated, the next regeneration operation is performed.

(B) Regeneration:

(1) Circulating heating and heating: stop the dehumidification fan 2, open the valves 301 and 602, close other valves, and run the circulating fan 3 to make the gas circulate between the adsorption dehumidifier 1 and the regeneration heater 6, and the regeneration heater 6 The supplied heat is transferred to the adsorption dehumidifier 1, so that the moisture absorbent bed 101 is gradually heated up to the regeneration temperature.

(2) Cyclic dehydration regeneration: continue to run the circulating fan 3 to circulate the gas between the adsorption dehumidifier 1 and the regeneration heater 6, and transfer the heat provided by the regeneration heater 6 to the adsorption dehumidifier 1 to maintain the moisture absorbent bed 101 regeneration temperature. After the moisture absorbent particles in the moisture absorbent bed 101 are heated, a relatively high water vapor partial pressure is generated inside the particles, and the water vapor partial pressure is higher than that in the circulating gas. Driven by the water vapor partial pressure difference, the moisture in the moisture absorbent particles diffuses to the gas phase, and the moisture content in the circulating gas gradually increases.

(3) Drain moisture: During the operation of step (1) or (2), when the moisture content of the circulating gas reaches 60g/kg-dry gas or above, the opening of the valves 301, 701, 702 can be adjusted intermittently Continuously or continuously, part of the circulating gas flows through the condenser 7, the water vapor contained in the gas is condensed, and the condensed water is discharged from the discharge port 14. Continue to carry out the above-mentioned cycle dehydration regeneration and discharge water operation at the same time until no condensed water is discharged, and then proceed to the next cooling operation.

(4) Cooling: the regenerative heater 6 stops heating, opens the valves 108 and 109, closes other valves, runs the dehumidification fan 2, and feeds cold gas into the adsorption dehumidifier 1 for cooling; or opens the valves 602, 701, 702, and closes other valves. The valve operates the circulating fan 3 to circulate the gas between the adsorption dehumidifier 1 and the condenser 7 to cool the adsorption dehumidifier 1 . The adsorption dehumidifier 1 enters the next operation cycle after cooling down to normal temperature.

When the dehumidification device is used for air dehumidification, the dehumidification operation is generally at normal pressure, and when it is used for dehumidification treatment of energy gas, chemical raw material gas, and industrial gas, the dehumidification operation is generally under pressurized conditions. The gas that is circulated and heated in the regeneration circuit during the regeneration operation is the same gas as the dehumidification operation. The pressure in the adsorption dehumidifier and regeneration loop may increase during regeneration operation due to (a) the pressure increase caused by the increase in gas temperature during regeneration heating, and (b) the conversion of water in the adsorbed state to water vapor Depending on the pressure level of the adsorption dehumidifier, regeneration heater, circulation fan and other equipment, the pressure of the adsorption dehumidifier and/or regeneration circuit may be too high and need to be decompressed. Preferably, the device shown in Figure 1 and this All specific embodiments of the utility model can be provided with an exhaust port 16 for discharging part of the circulating gas and/or water vapor. Preferably, a regulating valve 8 can also be provided at the exhaust port 16, and the regulating valve 8 can take the form of Including valves controlled by PLC according to pressure and/or humidity sensor signals, self-operated pressure regulating valves, solenoid valves or manual valves, the regulating valve 8 can also be omitted, and only the exhaust port 16 with a suitable diameter is provided to discharge part of the gas. Circulating gas and/or water vapor (at this time, its exhaust volume is controlled by the gas pressure in the regeneration circuit). When dehumidifying air, the exhaust port 16 leads to the atmosphere; when dehumidifying energy gas, chemical raw material gas, and industrial gas, the exhaust port 16 leads to (condensation) recovery equipment.

In the above-mentioned cyclic heating stage, when the temperature of the hygroscopic agent bed 101 reaches about 60° C., a small amount of moisture may start to desorb, but the heat provided by the regenerative heater 6 is mainly used for the apparent heating of the hygroscopic agent bed 101. Hot, the sign of the heating up phase of the cyclic heating is that the temperature of the desiccant bed 101 continues to rise. In the cycle dehydration regeneration stage, the temperature of the moisture absorbent bed 101 is basically stable at the regeneration temperature, and the heat provided by the regeneration heater 6 is mainly used for the desorption heat of moisture. When the air dehumidifier is heated and regenerated, the circulating air is heated by the regeneration heater 6 After reaching about 150°C, it is passed into the adsorption dehumidifier 1, and the hot air at 150°C releases sensible heat to the dehumidifier bed 101. After cooling down to about 80°C, it is discharged from the adsorption dehumidifier 1, then circulates into the regeneration heater 6, and is heated to 150°C again. °C is one cycle. In each cycle, the heating amount provided by the regenerative heater 6 to the circulating gas is 70 kJ/kg-dry air, the heat loss of the outer surface of the equipment accounts for about 2.5% of this heating, and the desorption heat of moisture is 2500 kJ/kg-water, therefore, every kilogram of circulating air in each cycle is released to the desiccant bed The sensible heat is only enough to desorb 27 g of water. Increasing the temperature of the gas heated by the regeneration heater 6 to above 150°C can increase the dehydration amount of each cycle, but the increase of the heating temperature is limited by the heat-resistant temperature of the moisture absorbent. When the hygroscopic agent is silica gel, zeolite molecular sieve, or activated alumina, the highest gas temperatures heated by the regenerative heater 6 are about 180, 400, and 300° C. respectively.

In the above-mentioned cyclic dehydration regeneration stage, when the temperature of the moisture absorbent bed 101 reaches about 100°C, the partial pressure of water vapor inside the moisture absorbent particles can reach 1 atmosphere; when the temperature of the moisture absorbent bed 101 is higher than 100°C, the moisture The partial pressure of water vapor inside the agent particles can be greater than 1 atmosphere. The partial pressure of water vapor in the circulating gas circulating between the adsorption dehumidifier 1 and the regenerative heater 6 is on the order of 0.01 - 0.1 atmosphere. Therefore, a small amount of moisture in the circulating gas has little effect on the moisture desorption process of the absorbent particles. During the cycle dehydration regeneration stage, the moisture content in the cycle gas will gradually increase.

In the above water discharge operation, part of the circulating gas flows through the condenser 7, the water vapor contained in the gas is condensed, and the condensed water is discharged from the discharge port 14. When the circulating gas is condensed to discharge moisture and returns to the regeneration circuit, it needs to be reheated by the regeneration heater 6 to raise the temperature. Therefore, the higher the moisture content of the condensed circulating gas, the lower the energy consumption. Generally, the moisture content of the circulating gas reaches 60g/kg-dry gas, preferably, 150g/kg-dry gas (temperature 80°C, relative humidity 40%, dew point 60°C) or above, before starting to discharge moisture. Under the parameter state of moisture content of 150g/kg-dry gas, the gas flow rate flowing through the condenser 7 is about 20% of the total flow rate of the circulating gas.

The above-mentioned circulation fan 3 can also be an axial flow fan, and the axial flow fan can be arranged in the adsorption dehumidifier 1 . Although the prior art generally adopts the way that the flow direction of the dehumidified airflow and the flow direction of the regeneration airflow are reversed, but for the present invention, it is not important whether the flow direction of the dehumidified airflow and the flow direction of the regeneration airflow are reversed. For all specific embodiments of the present utility model, the circulating fan 3 can be a bidirectional axial flow fan, and the circulating fan 3 can rotate forward and reverse alternately during regeneration heating so that the moisture absorbent bed 101 can be heated more uniformly. The regenerative heater 6 can adopt any form of heating equipment, such as electric heaters, heat exchangers, heaters using gas, liquid or solid fuels, heaters utilizing new or renewable energy sources such as solar collectors, etc.

The single-tower batch dehumidification device described in this embodiment is suitable for occasions where dry gas is used discontinuously in thermal energy, chemical industry, metallurgy and other industries.

Example 2

As shown in Figure 2, it is another intermittent adsorption dehumidification device of the present invention.

The adsorption dehumidifier 1 has hygroscopic agent beds 101, 102 composed of hygroscopic agent particles and heat exchange tubes 105, 106 spaced apart from the hygroscopic agent beds 101, 102. The heat exchange surfaces of , 106 are in contact with each other to avoid local overheating of the moisture absorbent beds 101, 102; the circulation fan 3 is a two-way axial flow fan; An operating cycle of the device includes dehumidification, regeneration steps:

(A) Dehumidification: Cooling medium is introduced into the heat exchange tubes 105, 106, valves 108, 109 are opened, other valves are closed, and the dehumidification fan 2 is operated, so that the gas to be dehumidified entering through the inlet 10 flows through the adsorption dehumidifier 1, and the gas The moisture in the gas is adsorbed and removed by the hygroscopic agent beds 101 and 102, and the gas is cooled by the heat exchange tubes 105 and 106, and the dehumidified gas is discharged through the outlet 11. When the hygroscopic agent beds 101 and 102 are nearly saturated, the next regeneration operation is performed.

(B) Regeneration:

(1) Circulating heating and heating: open the valves 301 and 302, close other valves, feed the heating medium into the heat exchange tubes 105 and 106, and run the circulation fan 3 to make the gas circulate in the regeneration circuit, and the heat exchange tubes 105 The heat provided by , 106 is transferred to the moisture absorbent beds 101, 102, so that the temperature of the moisture absorbent beds 101, 102 is gradually raised to the regeneration temperature.

(2) Cyclic dehydration regeneration: continue to run the circulating fan 3 to circulate the gas in the regeneration circuit, and transfer the heat provided by the heat exchange tubes 105 and 106 to the dehydrating agent beds 101 and 102 to maintain the dehydration of the dehydrating agent beds 101 and 102. regeneration temperature. After the hygroscopic agent particles in the hygroscopic agent beds 101 and 102 are heated, the moisture diffuses to the gas phase, and the moisture content of the circulating gas gradually increases.

(3) Moisture discharge: When the moisture content of the circulating gas reaches 60g/kg-dry gas or above, open the regulating valve 8 intermittently or continuously to discharge part of the circulating gas and/or water vapor. Continue the above-mentioned cycle dehydration regeneration and water discharge operations until the moisture content of the cycle gas no longer increases, then proceed to the next step of cooling and drying operations.

(3) Cooling and drying: run the dehumidification fan 2, pass cold gas into the adsorption dehumidifier 1 for cooling, and at the same time let part of the cold gas flow through the circulation fan 3 to dry it; or pass cooling air into the heat exchange tubes 105 and 106 medium, run the circulation fan 3, and cool the hygroscopic agent beds 101, 102. The adsorption dehumidifier 1 enters the next operation cycle after cooling down to normal temperature.

The cooling medium passed into the heat exchange tubes 105, 106 during the above dehumidification operation can be cold water, cold air, etc.; the heating medium passed into the heat exchange tubes 105, 106 during the regeneration operation can be high temperature steam, hot air, hot Any gas or liquid with proper temperature, such as flue gas, heat transfer oil, etc.

In the above-mentioned dehumidification operation, the function of passing the cooling medium into the heat exchange tubes 105 and 106 is to remove the heat of adsorption. During gas adsorption, most of the kinetic energy of gas molecule motion is converted into heat energy. Therefore, adsorption is an exothermic process, and the released heat is called adsorption heat. Due to the heat of adsorption, the temperature rise of the absorbent bed and the dehumidified gas during the dehumidification operation can generally reach 5-10°C (or even higher, depending on the temperature, humidity, performance of the hygroscopic agent, etc. of the gas), and the temperature rise is within a certain range. The dehumidification effect is reduced to a certain extent. A cooling medium is introduced into the heat exchange tubes 105 and 106 to remove the heat of adsorption to improve the dehumidification effect. If the temperature rise of the hygroscopic agent beds 101 and 102 is too large during the dehumidification operation, while the dehumidification fan 2 is running to feed the gas to be dehumidified into the adsorption dehumidifier 1 to perform the dehumidification operation, the valves 301 and 302 are opened, and the circulation fan 3 is operated to make some The return flow of dehumidified gas can further improve the cooling effect. When the adsorption dehumidifier 1 adopts a fluidized bed type, the moisture absorbent beds 101 and 102 can be combined into a fluidized bed, and the heat exchange tubes 105 and 106 are directly placed in the fluidized bed, which can greatly improve dehumidification cooling and regeneration heating The heat transfer efficiency between the heat exchange tubes 105, 106 and the desiccant beds 101, 102 can be improved, and when the desiccant particles are in a fluidized state, there will be no partial contact between the desiccant particles and the heat exchange tubes 105, 106. overheat.

In the above moisture discharge operation, the mixture of circulating gas and water vapor at a temperature of about 60-80°C is discharged through the regulating valve 8. Therefore, the higher the moisture content of the discharged circulating gas, the higher the regeneration energy consumption. lower. Generally, after the moisture content of the circulating gas reaches 60g/kg-dry gas or above, preferably, after reaching 150g/kg-dry gas or above, the moisture discharge operation will start. After the mixture of circulating gas and water vapor is discharged outward through the regulating valve 8, the amount of circulating gas in the regeneration circuit gradually decreases, the concentration of water vapor gradually increases, and the water vapor partial pressure difference between the inside of the moisture absorbent particles and the circulating gas gradually decreases. So small that the moisture absorbent cannot be completely dehydrated and regenerated. But generally speaking, the moisture absorbent does not need to be fully regenerated, as long as most of the moisture is desorbed, it can be put into dehumidification operation. If the hygroscopic agent needs to be completely regenerated, the valve 108 can be opened to run the dehumidification blower 2 to supplement the recirculation gas to the regeneration circuit while performing the cycle dehydration regeneration operation. Of course, the device shown in Embodiment 2 can also be provided with a condensation branch similar to the device in Embodiment 1 to discharge moisture. The device shown in embodiment 1 adopts the condensate drainage method, and the main function of the regulating valve 8 is to reduce pressure; the device shown in embodiment 2 uses the method of directly discharging water vapor to discharge water, and the function of the regulating valve 8 is mainly to discharge water vapor . All specific implementations of the utility model can use condensation drainage method or direct discharge method to discharge water. The advantage of the condensate drainage method is that there is no need to erect intake and exhaust pipes; the advantage of the direct discharge method is that no condenser is required. The regulating valve 8 that is used to discharge water vapor in the device shown in Figure 2 and all specific implementations of the present utility model can adopt any form of valve, and also can omit regulating valve 8, only the exhaust port 16 of suitable diameter is set (here When the exhaust volume is controlled by the gas pressure in the regeneration circuit). When using the method of directly discharging water vapor to discharge water, a higher regeneration operating temperature should be used so that the lowest temperature of the regeneration circuit has a temperature higher than 100°C.

Parts not mentioned in this embodiment are similar to those in Embodiment 1, and their working principles and applications are the same as those in Embodiment 1, and will not be repeated here.

Example 3

As shown in Figure 3, it is another intermittent adsorption dehumidification device of the present invention.

The adsorption dehumidifier 1 has moisture absorbent beds 101, 102, 103, 104 composed of moisture absorbent particles, heat exchange tubes 105, and circulation fan 107; the partition 100 divides the interior of the adsorption dehumidifier 1 into two chambers. Running the circulation fan 107 can circulate the gas in the adsorption dehumidifier 1 . An operation cycle of the dehumidification device also includes dehumidification and regeneration steps. When the water needs to be discharged, the valve 701 can be opened. Since the gas pressure in the adsorption dehumidifier 1 is higher than the pressure in the condenser 7, the gas in the adsorption dehumidifier 1 enters the condenser 7, and the water vapor contained in the gas is condensed, and the condensed water is discharged from the port 14 out. The advantage of the dehumidification device with built-in heat exchange tubes and circulating fans is that external circulation pipes and valves are omitted, thus reducing heat loss. The device shown in Figure 3 is only a preferred embodiment, and those skilled in the art can easily make various changes, for example, changing the form, quantity and installation position of the adsorption dehumidifier, the regenerative heater and the circulation fan, and the partition The form and number of plates (or the elimination of partitions) can be used to circulate the gas between the regeneration heater and the desiccant bed by means of the forced convection of the circulation fan to achieve a similar effect. Various changes that can be made according to the teaching of this embodiment are included in the protection scope of the claims of the present utility model.

Parts not mentioned in this embodiment are similar to those in Embodiment 2, and their working principles and application occasions are the same as those in Embodiment 2, and will not be repeated here.

Example 4

Since the microporous structure of the hygroscopic agent itself determines that the heat and mass transfer inside the hygroscopic agent is extremely slow during the heating and regeneration process of the hygroscopic agent, it is usually the rate-controlling step of its heating and regeneration, and the external conditions of the hygroscopic agent such as circulating gas The flow rate generally has little effect, therefore, it is feasible to cancel the circulation fan and only rely on the natural convection caused by the temperature difference caused by the temperature difference caused by the heating of part of the circulating gas by the regenerative heater to make the gas circulate between the regenerative heater and the desiccant bed. . As shown in Fig. 4, it is a natural convection heat exchange mode intermittent adsorption dehumidification device of the present invention. The adsorption dehumidifier 1 has hygroscopic agent beds 101, 102 composed of hygroscopic agent particles and regeneration heaters 105, 106; the partition 100 divides the interior of the adsorption dehumidifier 1 into left and right cavities. When regenerative heating starts, all valves are closed, and regenerative heaters 105, 106 are heated alternately. When the regenerative heater 105 heats up and the regenerative heater 106 stops heating, the density of the gas in the right cavity after being heated is less than that of the gas in the left cavity, so the gas in the right cavity moves upward and the gas in the left cavity moves downward , so that the gas in the adsorption dehumidifier 1 generates a circulating flow. When the regeneration heater 105 stops heating and the regeneration heater 106 heats up, the direction of the circulation flow is reversed. When the moisture content of the circulating gas reaches 60g/kg-dry gas or above, the moisture discharge operation can be started: open the valves 110, 701, 702 and adjust the gas flow rate flowing through the condenser 7, and the regenerative heaters 105, 106 are heated at the same time , the gas inside the adsorption dehumidifier 1 moves upward, the gas in the external pipeline flows downward, part of the circulating gas flows through the condenser 7, and the moisture is condensed and discharged. The advantages of the dehumidification device with natural convection heat exchange are uniform heating, small heat loss, lower equipment cost and power consumption after omitting the circulation fan, and higher safety when used for dehumidification of energy gas, chemical raw material gas, and industrial gas. . The device shown in Figure 4 is only a preferred embodiment, and those skilled in the art can easily make various changes, such as changing the form of the adsorption dehumidifier, the form, quantity and installation position of the regenerative heater, and the form and location of the partition. A similar effect can be achieved by using the natural convection generated by the heating of the gas to circulate the gas between the regeneration heater and the desiccant bed. For example, only one moisture absorbent bed and one regenerative heater are set in the adsorption dehumidifier. The regeneration heater is located below the moisture absorbent bed and does not contact the moisture absorbent bed. When the regeneration heater is heated, the heat is transferred to the Inside the moisture absorbent bed, the moisture absorbent bed is heated to generate water vapor to increase the pressure, and the water vapor enters the condenser to be condensed and discharged. As another example, the flat-plate solar collector can be used as a regeneration heater to heat the circulating gas in the regeneration circuit. The adsorption dehumidifier is made into a rectangle and installed on the backlight side of the flat-plate solar collector. The highest end and the lowest end are respectively connected to the highest end and the lowest end of the adsorption dehumidifier. The gas in the solar collector is heated by solar radiation and moves upwards and then flows into the adsorption dehumidifier. The cooler gas in the adsorption dehumidifier moves downward. Movement and circulation into the solar heat collector, so as to realize solar heating and regenerative adsorption dehumidifier in the way of natural convection heat exchange. It should be noted that it is impossible to list all the implementations of the utility model here, and any other specific implementations designed according to the principle and essence of the utility model are all included in the protection scope of the claims of the utility model .

Parts not mentioned in this embodiment are similar to those in Embodiment 3, and will not be repeated here.

Example 5

As shown in Figure 5, it is a rotary wheel type continuous dehumidification device with heat recovery of the present invention. It includes a dehumidification runner 1, a dehumidification gas circuit, a heat recovery gas circuit and a regeneration circuit. The surface of the slowly rotating desiccant wheel 1 mainly made of hygroscopic material is divided into a hygroscopic zone 111 , a preheating zone 112 , a regeneration zone 113 and a cooling zone 114 in sequence. The gas to be dehumidified entering from the inlet 10 in the dehumidification gas path is sent to the dehumidification zone 111 by the dehumidification fan 2 for dehumidification, and the dehumidified gas is discharged from the outlet 11 . Along with the rotation of the runner, the part of the runner that has absorbed moisture in the dehumidification zone 111 turns into the preheating zone 112 . After preheating in the preheating zone 112, this part of the rotor is transferred to the regeneration zone 113. In the regeneration circuit, the circulation fan 3 runs continuously, so that the gas circulates between the regeneration heater 6 and the regeneration zone 113, and maintains the regeneration temperature of the regeneration zone 113, so that the part of the runner that has absorbed moisture into the regeneration zone 113 is firstly exhausted. The temperature is raised by circulating heating, and then regenerated by circulating dehydration. Subsequently, the dehydrated and regenerated part of the runner is transferred to the cooling zone 114 to cool down and then returns to the moisture absorption zone 111. Under the negative pressure of the fan 4 in the regenerating air path, the gas from the outside enters the cooling zone 114 of the dehumidification rotor 1 through the air inlet 15, recovers the sensible heat of the part of the rotor just after dehydration and regeneration, and then uses it as The cooling medium enters the condenser 7, recovers the sensible heat and latent heat of the circulating gas in the condensation branch of the regeneration circuit, and the gas after heat absorption and temperature rise enters the preheating zone 112 of the dehumidification wheel 1 to heat the part located in the preheating zone 112 Runner, discharges to the outside through the air outlet 17 of blower fan 4 then. The above-mentioned dehumidification operation and regeneration operation are carried out continuously, which is the outstanding advantage of the rotary dehumidification device. Most of the existing dehumidification runners are only divided into two areas: the moisture absorption area and the regeneration area. The regeneration circuit of the utility model can be used for the regeneration of the dehumidification rotors in these two areas; some dehumidification rotors are divided into three areas: The moisture absorption zone, the preheating zone and the regeneration zone, the regeneration of the dehumidification runners in these three zones can also be provided with a reheating gas path in addition to the regeneration circuit of the utility model. When the dehumidification wheel is used for indoor air dehumidification, the reheating air path can use indoor air.

It should be noted that the regeneration zone 113 in this embodiment only has one regeneration gas inlet and one regeneration gas outlet connected to the regeneration circuit. The regeneration zone 113 in FIG. The adsorption dehumidifier or the regeneration zone of the adsorption dehumidifier, for example, the regeneration section of the multi-stage moving bed adsorption dehumidifier, the regeneration section of the multi-stage fluidized bed adsorption dehumidifier, the regeneration tower of the double fluidized bed dehumidifier, etc. Apparently, the same embodiment as the regeneration loop in Fig. 5 can also be used for cyclic heating regeneration of the regeneration zone (or regeneration section, regeneration section, regeneration tower, regenerator, etc.) of other types of adsorption dehumidification equipment.

The regeneration circuit and condensation branch of the device shown in Figure 5 are the same as those of the device in Figure 1, and the description can refer to the relevant parts of the device in Figure 1. This embodiment is suitable for continuous dehumidification of air. Parts not mentioned in this embodiment are similar to those in Embodiment 1, and will not be repeated here.

Example 6

In order to further reduce energy consumption, a continuous dehumidification device designed by the utility model with coupled operation of a runner and a refrigeration/heat pump cycle is shown in Figure 6 . The refrigeration/heat pump cycle (that is, the refrigerant circuit) includes a compressor 901 , a condenser 902 , an expansion valve 903 , a first evaporator 905 , and a second evaporator 906 . The refrigerant liquid in the refrigeration/heat pump cycle is compressed by the compressor 901 into a high-temperature and high-pressure state, and then releases heat in the condenser 902 (for the regeneration circuit, it acts as a regeneration heater), and then throttled by the expansion valve 903 into a low-temperature and low-pressure state After that, it absorbs heat in the first evaporator 905 and the second evaporator 906 (for the dehumidification gas circuit and the condensation branch of the regeneration circuit, it acts as a cooler), and then enters the compressor 901 for compression, which is refrigeration/heat pump A period of the cycle. Adjusting the expansion valve 903 can adjust the temperature of the refrigerant liquid in the first evaporator 905, so that the gas temperature at the outlet 11 is significantly lower than the gas temperature at the inlet 10, which can be called a refrigeration cycle; when the gas temperature at the outlet 11 is equivalent to the temperature at the inlet 10 When the gas temperature is , it can be called a heat pump cycle. In Fig. 6, the regenerative heater 6 is used for starting heating and auxiliary heating. The device recovers most of the adsorption heat of the dehumidification gas circuit and the water vapor condensation latent heat and gas sensible heat of the regeneration circuit for regeneration heating, thus greatly reducing the energy consumption of regeneration heating. Parts not mentioned in this embodiment are similar to those in Embodiment 5, and their working principles and application occasions are the same as those in Embodiment 5, and will not be repeated here.

Example 7

Fig. 7 is a schematic diagram of a continuous dehumidification device designed by the utility model with a return air rotor coupled with a cooling/heat pump cycle. The first evaporator 905 and the second evaporator 906 operate in parallel, and adjusting the expansion valves 903 and 904 respectively can independently adjust the temperature of the refrigerant liquid in the first evaporator 905 and the second evaporator 906 . The circulation fan 5 in the dehumidification gas path returns part of the gas cooled by the first evaporator 905 to the dehumidification area, which can reduce the temperature of the dehumidification area and improve the dehumidification effect. Preferably, a valve 109 may be provided in the dehumidification gas path for adjusting the flow rate and pressure of the dehumidification gas path. Preferably, an air inlet 15 with a valve 301 and a valve 302 can also be set in the regeneration circuit, and the opening degree of the valves 301, 302 can be adjusted to make the gas from the outside, or other gas sources, or the dehumidification gas path Part of the gas to be dehumidified or the dehumidified gas is supplemented intermittently or continuously through the air inlet 15 into the regeneration circuit. The device shown in Figure 7 discharges moisture by discharging water vapor out of the regeneration circuit, please refer to the description of the device in Figure 2 about the way of directly discharging water vapor. Parts not mentioned in this embodiment are similar to those in Embodiment 6, and their working principles and application occasions are the same as those in Embodiment 6, and will not be repeated here.

Example 8

Two or more adsorption dehumidifiers in any form of Examples 1 to 4 can be operated in parallel or in series to form a continuous dehumidification device. A continuous dehumidification device of the present utility model, which is composed of two intermittent adsorption dehumidifiers connected in parallel and shares a regeneration circuit, is shown in Figure 8 . Through the switching of valves 18-25, adsorption dehumidifier A and B towers alternately dehumidify and regenerate. This device is suitable for dehumidification treatment of various gases in industrial and civil occasions. When the device is used for indoor air dehumidification, indoor humid air enters through the inlet 10, and dry air enters the room through the outlet 11. The heating regeneration of the adsorption dehumidifier has the following two modes:

(a) Regeneration-heating mode suitable for low-temperature and high-humidity seasons: the condenser 7 is used to discharge water during circulation heating and regeneration, and the cooling medium of the condenser 7 is indoor air, which can increase the indoor air temperature at the same time, and plays a role in the indoor air supply. The effect of heat. In the above process, the heat of the regenerative heater 6 is firstly used to desorb moisture from the moisture absorbent into water vapor, and then the latent heat of condensation of the water vapor is used to heat the indoor air, so all the heat of the regenerative heater 6 is effectively use. In addition, the adsorption heat generated during the dehumidification operation of the device is actually used to increase the indoor temperature. In the season when heating and dehumidification are required at the same time, the device has the outstanding advantage of high energy utilization rate when applied to indoor air humidity regulation.

(b) The regeneration-exhaust mode suitable for high-temperature and high-humidity seasons: the condenser 7 is not used during the cycle heating regeneration, and the water vapor is discharged to the outside through the exhaust port 16; the cooling after the regeneration is completed uses the air inlet 15 outside air.

Parts not mentioned in this embodiment are similar to those in Embodiment 1, and its working principle is the same as that in Embodiment 1, so details will not be repeated here.

Example 9

Another dehumidification device of the present utility model is shown in FIG. 9 , which is operated by coupling three adsorption dehumidifiers in parallel with a refrigeration/heat pump cycle. The device includes adsorption dehumidifiers A, B, C towers and dehumidification gas circuit, regeneration circuit, heat recovery circuit and refrigeration/heat pump cycle. Towers A, B, and C take turns for dehumidification and regeneration operations. 3, 4, and 5 are circulating fans, and they are all bidirectional axial flow fans. Valves 26 and 29, 27 and 30, 28 and 31 are dehumidification gas path valves of towers A, B and C respectively; valves 34, 33 and 32 are return air valves of towers A, B and C respectively; valves 37 and 38, 36 and 39, 35 and 40 are regeneration circuit valves of towers A, B and C respectively; valves 41 and 44 are heat recovery circuit valves between towers A and B, and valves 43 and 46 are heat recovery circuit valves between towers B and C. Heat loop valves, valves 42 and 45 are heat recovery loop valves between towers A and C. There is only one expansion valve 903 upstream of the parallel first evaporator 905 and the second evaporator 906 of the refrigeration/heat pump cycle, and the regulating valves 909 and 910 can adjust the refrigerant liquid flowing through the first evaporator 905 and the second evaporator 906 respectively. flow.

When Tower A is performing dehumidification operation, open the valves 26 and 29, and the dehumidification fan 2 will send the gas to be dehumidified from the inlet 10 into Tower A, and the dehumidified gas will be discharged from the outlet 11 after being cooled by the first evaporator 905; if the temperature of Tower A rises If it is too large, open the valve 34 and run the circulation fan 3, so that part of the gas cooled by the first evaporator 905 can be refluxed, which can reduce the temperature of the A tower. At this time, tower C is performing regeneration operation, its dehumidification gas circuit valves 28 and 31 are closed, regeneration circuit valves 35 and 40 are opened, and the circulation fan 5 is running. The condenser 902 provides heat for dehydration and regeneration of tower C. After tower C completes the regeneration, close the regeneration loop valves 34 and 40, open the heat recovery loop valves 43 and 46 between the B and C towers, and run the circulation fan 4 and/or 5, and then the next B tower that needs to be regenerated and the one that has just completed the regeneration A heat recovery loop is formed between the C towers, the B tower is preheated to raise the temperature, and the C tower is cooled down at the same time. After the heat recovery is completed, the B tower enters the regeneration operation, and the C tower enters the dehumidification operation.

This embodiment is suitable for dehumidification treatment of various gases. Parts not mentioned in this embodiment are similar to those in Embodiment 1, and its working principle is the same as that in Embodiment 1, so details will not be repeated here.

Example 10

Another continuous dehumidification device of the present invention, which is composed of three adsorption dehumidifiers connected in series, is shown in Fig. 10 . Adsorption dehumidifiers A, B, and C towers are connected successively on the annular gas path 66, and are provided with separation valves 47, 48, 49, and the main intake pipe 64 is connected to the gas inlet 10 to be dehumidified. The inlet ends of each tower are connected, and the exhaust main pipe 65 is connected with the dehumidified gas outlet 11. At the same time, the branch pipes of the exhaust main pipe 65 are respectively connected with the exhaust ends of each tower, and the valves 56 and 57, 58 and 59, 60 and 61 They are inlet valves and exhaust valves of towers A, B and C respectively, and valves 50 and 51, 52 and 53, 54 and 55 are regeneration circuit valves of towers A, B and C respectively.

The operation steps of the device are as follows: in the initial state, all valves are closed, and the valves 56, 47, 48, 61 are opened at the beginning of the dehumidification operation, and the dehumidification fan 2 is operated. Discharge from outlet 11; when tower A is close to saturation, open valve 58, close valve 56, continue dehumidification with towers B and C, open valves 50, 51, regenerate tower A with regeneration circuit, and use the gas entering through inlet 15 Cool tower A; when tower A completes regeneration and switches to dehumidification operation, open valves 49 and 57, and close valve 61. At this time, the dehumidification operation sequence is tower B, C, tower A, that is, tower A that has just completed regeneration is placed in The last position of the dehumidification operation sequence. Similarly, when the next tower B is regenerated, open valve 60, close valve 58, use C and A towers to continue dehumidification, open valves 52 and 53, and use the regeneration circuit to regenerate B tower, when B tower completes regeneration and switches to dehumidification operation, Open the valves 47 and 59, close the valve 57, and the dehumidification operation sequence at this time is C, A, B towers. Other steps are similar. The advantage of this device is that it can stably produce dry gas with an extremely low dew point temperature, and it can prevent the newly regenerated adsorption dehumidifier from contacting with humid gas, thus prolonging the service life of the hygroscopic agent. The device can also be provided with a heat recovery gas circuit and used in conjunction with a refrigeration/heat pump cycle.

This embodiment is suitable for dehumidification treatment of various gases. Parts not mentioned in this embodiment are similar to those in Embodiment 1, and its working principle is the same as that in Embodiment 1, so details will not be repeated here.

The implementation of the utility model only involves conventional equipment such as adsorption dehumidifiers, electric heaters or heat exchangers, centrifugal or axial flow fans, etc. of ordinary material shells, and the dehumidification runner itself involved in embodiments 5 to 6 is a relatively mature technology Product, the refrigeration/heat pump cycle that embodiment 6, 7 and embodiment 9 also relate to is also relatively mature technical product. Therefore, the utility model can be easily manufactured as industrial products, for example, civil dehumidifiers for dehumidification in human settlements, industrial dehumidifiers for air humidity adjustment in industrial facilities, industrial dehumidifiers for various industrial gases, chemical raw material gases, and energy gases. Special dehumidification treatment devices such as compressed air, compressed natural gas adsorption dryers, etc.

Using a dehumidifier to dehumidify the air and collect the condensate is actually taking water from the air. The device shown in Fig. 1, 3 to 9 of the utility model can be used for air water intake, and the device shown in Fig. 2, 10 can also be used for this purpose after the exhaust port 16 is equipped with a condenser. The application of the utility model in the technical field of air water intake is included in the protection scope of the claims of the utility model.

Dehumidification can be considered a fundamental unit operation. Dehumidification technology is widely used in thermal energy, chemical industry, metallurgy, electronics, machinery, light industry, food, pharmaceutical and other industries. Dehumidification technology can also be combined with other existing technologies to form a system for various purposes. For example, the utility model can constitute a normal temperature drying system in the following manner: the dehumidified gas outlet of any dehumidification device shown in Figures 1 to 10 is connected to the gas inlet of the container loaded with the material to be dried, The gas outlet of the container is connected to the gas inlet of the dust removal equipment, and the gas outlet of the dust removal equipment is connected to the gas inlet to be dehumidified of the dehumidification device. The utility model can constitute a refrigeration and air-conditioning system in the following manner: the dehumidified gas outlet of any dehumidification device shown in Figures 1 to 5 and Figures 8 and 10 is connected to a surface cooler and an isenthalpic humidifier. The application of the utility model in various industrial fields and its combined application with other prior art are included in the protection scope of the claims of the utility model.

Apparently, the above-mentioned embodiments of the present utility model are only examples for clearly illustrating the present utility model, rather than limiting the implementation manner of the present utility model. For those of ordinary skill in the art, on the basis of the above description, other changes or changes in different forms can also be made, and it is not necessary and impossible to exhaustively enumerate all the implementation manners here. All modifications, equivalent replacements and improvements made within the spirit and principles of the utility model shall be included in the protection scope of the claims of the utility model.

Claims (15)

1. an absorption dehumidifying device, comprise dehumidifying gas circuit, in described dehumidifying gas circuit, connect and need the gas feed that dehumidifies, adsorption moisture eliminator, gas vent has dehumidified, in described dehumidifying gas circuit, be also provided with several valves, it is characterized in that, also comprise regenerative circuit, regenerative heater, circulating fan, and drainage equipment, described circulating fan and regenerative heater are arranged on described regenerative circuit, described regenerative circuit is connected input and the output of described adsorption moisture eliminator, circulating fan orders about gas and flows in described regenerative circuit cocycle, described drainage equipment is communicated with regenerative circuit.

2. absorption dehumidifying device according to claim 1, is characterized in that, described drainage equipment comprises exhaust outlet or condenser, and described exhaust outlet or condenser are connected with regenerative circuit, is also provided with condensate drain outlet on described condenser.

3. absorption dehumidifying device according to claim 1, it is characterized in that, described adsorption moisture eliminator inside is made up of several hygroscopic agent beds spaced apart from each other, and described regenerative heater comprises heat exchanging pipe, and described heat exchanging pipe is through described adsorption moisture eliminator inside and avoid described hygroscopic agent bed.

4. absorption dehumidifying device according to claim 1, it is characterized in that, described regenerative circuit is arranged on adsorption moisture eliminator inside, and two cavitys that are interconnected by adsorption moisture eliminator inside form, described circulating fan orders about gas and circulates between described two cavitys, in described two cavitys, be provided with hygroscopic agent bed, described regenerative heater comprises heat exchanging pipe, and described heat exchanging pipe is through described adsorption moisture eliminator inside and avoid described hygroscopic agent bed.

5. absorption dehumidifying device according to claim 1, it is characterized in that, the quantity of described dehumidifying gas circuit is at least two, each dehumidifying gas circuit connection parallel with one another and separating by described some valves, described regenerative circuit is connected respectively the adsorption moisture eliminator in described each dehumidifying gas circuit, and gas can circulate and carry out heat exchange individually between any one adsorption moisture eliminator and described regenerative circuit.

6. absorption dehumidifying device according to claim 5, it is characterized in that, described dehumidifying gas circuit is at least three, between each adsorption moisture eliminator, be also connected with backheat gas circuit, gas circulates between two adsorption moisture eliminators by described backheat gas circuit, so that two adsorption moisture eliminators can carry out heat exchange.

7. absorption dehumidifying device according to claim 1, is characterized in that, described adsorption moisture eliminator is desiccant wheel, and described dehumidifying gas circuit connects the moisture absorption district of described desiccant wheel, and described regenerative circuit is connected the renewing zone of described desiccant wheel.

8. according to the absorption dehumidifying device described in claim 1 ~ 7 any one, it is characterized in that, also comprise heat pump, described regenerative heater is the condenser being arranged on described heat pump, and the condenser of described regenerative circuit is the first evaporimeter being arranged on heat pump.

9. according to the absorption dehumidifying device described in claim 1 ~ 7 any one, it is characterized in that, described heat pump is also provided with the second evaporimeter, described the second evaporimeter and the first evaporator series or be connected in parallel, described the second evaporimeter is arranged in dehumidifying gas circuit and at described adsorption moisture eliminator and has dehumidified between gas vent.

10. absorption dehumidifying device according to claim 9, is characterized in that, the outlet side of described the second evaporimeter and the inlet end of described adsorption moisture eliminator are connected, described the second evaporimeter of flowing through except humid gas can be back to adsorption moisture eliminator.

11. according to the absorption dehumidifying device described in claim 1 ~ 7 any one, it is characterized in that, is provided with for to regenerative circuit replenishment cycles gas or add the air inlet of refrigerating gas on described regenerative circuit.

12. according to the absorption dehumidifying device described in claim 1 ~ 7 any one, it is characterized in that, connects and be useful on the exhaust outlet that reduces regenerative circuit air pressure on described regenerative circuit.

13. 1 kinds of absorption dehumidifying devices, comprise dehumidifying gas circuit, in described dehumidifying gas circuit, connect and need the gas feed that dehumidifies, adsorption moisture eliminator, gas vent has dehumidified, in described dehumidifying gas circuit, be also provided with several valves, it is characterized in that, also comprise regenerative circuit, regenerative heater, and drainage equipment, described regenerative heater is arranged on described regenerative circuit, described regenerative circuit is connected input and the output of adsorption moisture eliminator, the heating that described regenerative circuit is arranged through described regenerative heater is ordered about gas and is flowed in described regenerative circuit cocycle, described drainage equipment is communicated with regenerative circuit, described drainage equipment comprises exhaust outlet or condenser, described exhaust outlet or condenser connect described regenerative circuit.

14. absorption dehumidifying devices according to claim 13, it is characterized in that, described regenerative circuit is made up of two cavitys that are interconnected of described adsorption moisture eliminator inside, in described two cavitys, be provided with hygroscopic agent bed, described regenerative heater is arranged in described cavity and avoids described hygroscopic agent bed.

15. 1 kinds of absorption dehumidifying devices, comprise gas feed to be dehumidified, adsorption moisture eliminator, gas vent has dehumidified, it is characterized in that, also comprise regenerative circuit, regenerative heater, circulating fan, drainage equipment, and annular gas channel, described adsorption moisture eliminator quantity is several and is serially connected on described annular gas channel, the output of each adsorption moisture eliminator gas vent that dehumidified described in connecting respectively, the input of each adsorption moisture eliminator connect respectively described in gas feed to be dehumidified, between each adsorption moisture eliminator, be provided with valve, described circulating fan and regenerative heater are arranged on described regenerative circuit, described regenerative circuit is connected respectively input and the output of described each adsorption moisture eliminator, described circulating fan orders about gas and flows in regenerative circuit cocycle, described drainage equipment is communicated with regenerative circuit, described drainage equipment comprises exhaust outlet or condenser, described exhaust outlet or condenser connect described regenerative circuit.