CN207162794U - Recovery type heat double runner level Four dehumidifier/air-conditioning system with high temperature refrigerant cooling - Google Patents

Abstract

The utility model discloses a kind of recovery type heat double runner level Four dehumidifier/air-conditioning system with high temperature refrigerant cooling, including high temperature refrigerant system, auxiliary cooling system, auxiliary electrical heater system, two desiccant wheels, heat-exchangers of the plate type and blower fan system, the cold coal measures system of high temperature is by five pre-cooling units in parallel, water circulating pump, five flow control valves and high temperature low-temperature receiver form closed cycle, five pre-cooling units are sequentially distributed to form processing air pipe line by processing air-flow direction, each pre-cooling unit is correspondingly provided with flow control valve respectively, each desiccant wheel all deciles divide four regions into, dehumidify area and renewing zone order distribution, vertical angles region is identical function area.The air-conditioning system mainly designs according to the operation characteristic of rotary dehumidifier, the advantages of combining other Hybrid Air Condition Using Desiccants, has the advantages that dehumidification rate is high, regeneration energy consumption is low, Temperature and Humidity Control precision is high and low grade heat energy fully uses.

Description

Heat recovery double-rotor four-stage dehumidification air-conditioning system with high-temperature refrigerant cooling

technical field

The utility model relates to a dehumidification and air-conditioning system with runners, in particular to a heat recovery type double-rotor four-stage dehumidification and air-conditioning system cooled by high-temperature refrigerant (low-grade heat energy).

Background technique

In recent years, the rotary dehumidification air-conditioning system has been continuously developed and applied in our country. Its biggest advantage is that the wet treatment and heat treatment in the air treatment process are separately carried out, thus realizing the independent control of temperature and humidity. Although the humidity of the air treated by the dehumidification wheel meets the air supply requirements, the temperature rise is large, so the lower refrigerant temperature is no longer required in the further heat treatment process, which also makes low-grade high-temperature refrigerants well used. .

The existing rotary dehumidification air-conditioning system mainly adopts condensation heat as regeneration heat in reducing regeneration energy consumption, or regenerated exhaust air waste heat as regeneration heat, but does not recover condensation heat and regeneration exhaust air waste heat together as regeneration heat; In terms of utilizing low-grade high-temperature refrigerants, the high-temperature refrigerants are not classified and used, and most of them send out the treated air after the dehumidification rotor is cooled at one time, so that the low-grade high-temperature refrigerants are not fully utilized; in dehumidification The combination of the runner and the surface cooler and other equipment is mostly in the form of no precooling, single runner and the treatment area of the runner is only divided into two areas: the dehumidification area and the regeneration area, which restricts the improvement of the dehumidification performance of the rotary dehumidifier , but also reduces the overall performance of the system cooling and dehumidification. To sum up, most of the current rotary dehumidification air-conditioning systems have the disadvantages of no pre-cooling, high regeneration energy consumption, low efficiency of rotary dehumidification, and insufficient utilization of low-grade heat energy.

Utility model content

In order to solve the above-mentioned technical problems in the prior art, the purpose of this utility model is to provide a heat recovery type double-rotor four-stage dehumidification air-conditioning system with high-temperature refrigerant cooling. The air-conditioning system is mainly designed according to the operating characteristics of the rotary dehumidifier, and integrates the advantages of other rotary dehumidification air-conditioning systems. It has the advantages of high dehumidification efficiency, low regeneration energy consumption, high temperature and humidity control accuracy and full use of low-grade heat energy.

The technical solution of the utility model is: a heat recovery type double-rotor four-stage dehumidification air-conditioning system with high-temperature refrigerant cooling, which is characterized in that the dehumidification air-conditioning system includes a high-temperature refrigerant system, an auxiliary refrigeration system, an auxiliary electric heating system, two desiccant wheel, plate heat exchanger and fan system,

The high-temperature cold coal system consists of five parallel pre-cooling units, circulating water pumps, five flow regulating valves and high-temperature cold sources. The five pre-cooling units are distributed in sequence according to the flow direction of the processing air to form a processing air pipeline. Each pre-cooling unit Correspondingly set flow regulating valves, five pre-cooling units, circulating water pumps, five flow regulating valves and high-temperature cold sources form a closed loop;

The auxiliary refrigeration system consists of a condenser, an evaporator, a compressor and a throttle valve. The evaporator is located at the air outlet of the last pre-cooling unit. The condenser is connected with a plate heat exchanger, four auxiliary electric heaters, and a regeneration fan in sequence. ;

The auxiliary electric heating system is composed of four auxiliary electric heaters, and the four auxiliary electric heaters are distributed in sequence according to the flow direction of the regeneration air to form a regeneration air pipeline;

Each dehumidification wheel is equally divided into four areas, namely two dehumidification areas and two regeneration areas, the dehumidification area and the regeneration area are distributed sequentially, and the area on the opposite corner is the same functional area; the process air pipeline passes through the dehumidification area , the regeneration air pipeline passes through the regeneration zone;

The fan system consists of a supply fan and a regeneration fan, which power the flow of process air and regeneration air, respectively.

Among them, if the number of dehumidification wheels is 2+N, the number of auxiliary electric heaters is 4+2N, the number of pre-cooling units is 5+2N, and the number of flow regulating valves is 5+2N, N For the number of newly added dehumidification wheels.

According to the wind flow, the system is divided into the treatment air flow and the regeneration air flow. The air treatment process is as follows: the air to be dehumidified is sent to the first dehumidification wheel dehumidification zone I after being dried and cooled by the first pre-cooling unit, and sent to the second pre-cooling unit for pre-cooling and cooling after its drying temperature rise, and then sent to the second pre-cooling unit for pre-cooling and cooling. It enters the dehumidification zone I of the second dehumidification wheel, after its dehumidification and temperature rise, it is sent to the third pre-cooling unit for pre-cooling and cooling, and then driven by the blower into the dehumidification zone III of the second dehumidification wheel, after its drying temperature rise Then it is sent to the fourth pre-cooling unit for pre-cooling and cooling, and then sent to the dehumidification zone III of the first dehumidification wheel. After drying and temperature rise (the humidity meets the air supply requirements at this time), it is sent to the fifth pre-cooling unit for pre-cooling and cooling , and finally cooled down to the design air supply temperature by the evaporator and then sent out of the system. The regeneration air process is as follows: the regeneration air is heated by the condenser and then sent to the plate heat exchanger for sensible heat exchange with the hotter regeneration exhaust air. After further temperature rise, it is sent to the first auxiliary electric heater to be heated to the regeneration temperature and sent to into the regeneration zone II of the first dehumidification rotor, after the regeneration zone II is desorbed and dehumidified to restore the dehumidification capacity, the temperature of the regeneration air is lowered, and then sent to the second auxiliary electric heater to heat up to the regeneration temperature, and then sent to the second In the regeneration zone II of the dehumidification wheel, after the regeneration zone II is desorbed and dehumidified to recover the dehumidification capacity, the temperature of the regeneration air is cooled, and then sent to the third auxiliary electric heater to be heated to the regeneration temperature, and then sent to the regeneration zone IV of the second dehumidification wheel , after the regeneration zone IV is desorbed and dehumidified to restore the dehumidification capacity, the regeneration air is cooled, and then sent to the fourth auxiliary electric heater to heat up to the regeneration temperature, and then sent to the regeneration zone IV of the first dehumidification wheel, so that the regeneration zone IV After dehumidification and dehumidification restore the dehumidification capacity, it is driven by the regeneration fan and sent to the plate heat exchanger to exchange sensible heat with the newly entered regeneration air, and finally discharged out of the system.

Because the utility model adopts the above technical scheme, it has the following advantages: 1. Since the air-conditioning system recycles the condensation heat and the waste heat of the regenerated exhaust air together with multiple desorption and dehumidification processes of the regenerated wind to the dehumidification runner, this It avoids the energy waste of the regeneration air discharge system after one desorption and dehumidification of the traditional single-rotor single-stage dehumidification system, so the system has the characteristics of low regeneration energy consumption. 2. Since the system adopts the double-rotor four-stage dehumidification mode, more pre-cooling units can be set in this mode to pre-cool and cool the treated air, so the dehumidification rotor has better dehumidification performance, and the low-grade high-temperature cold source can be fully utilized. 3. The uniform division and sequential distribution of the drying area and the regeneration area of the dehumidification wheel make the heat and mass exchange process between the regeneration air and the regeneration area and between the treatment air and the dehumidification area more sufficient. 4. The evaporator of the auxiliary refrigeration system only performs the cooling process of the air under dry working conditions, so the evaporation temperature can be appropriately increased, so the energy efficiency of the auxiliary refrigeration system is higher. 5. The utility model has the advantages of very flexible and convenient design and use. It can be widely applied to the humidity adjustment requirements of the air-conditioning system with independent temperature and humidity control, and can better realize the energy-saving and efficient operation of the air-conditioning system.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Fig. 2 is the air treatment psychrometric chart of the present utility model.

Reference numerals: 1-first pre-cooling unit; 2-first dehumidification rotor; 3-second pre-cooling unit; 4-second dehumidification rotor; 5-third pre-cooling unit; 6-blower; 7- 4th pre-cooling unit; 8-fifth pre-cooling unit; 9-evaporator; 10-condenser; 11-plate heat exchanger; 12-first auxiliary electric heater; 13-second auxiliary electric heater; 14 - the third auxiliary electric heater; 15 - the fourth auxiliary electric heater; 16 - the regeneration fan; 17 - the compressor; 18 - the throttle valve; 19 - the fifth flow regulating valve; 20 - the first flow regulating valve; 21 - the fourth flow regulating valve; 22 - the second flow regulating valve; 23 - the third flow regulating valve; 24 - circulating water pump; 25 - high temperature cooling source.

Detailed ways

According to the low dehumidification efficiency of the rotary dehumidifier in high temperature environment, a pre-cooling unit is set before the treated air enters the dehumidification rotor to reduce the inlet temperature of the treated air to improve the dehumidification performance of the dehumidification rotor; After dehumidification, the temperature rise of the treated air is large and does not require wet treatment. The low-grade high-temperature refrigerant is used as the brine of the pre-cooling unit to bear the heat load of the treated air after the dehumidification rotor (dry cooling condition); in order to increase To deal with the contact time between the air and the dehumidification rotor (the longer the contact time, the more sufficient the heat and mass exchange process), the system is equipped with double rotors, each rotor is divided into four treatment areas, and there are four dehumidification processes in total, which in turn increases The number of pre-cooling times (the number of cooling times for the treated air before entering the dehumidification rotor), thereby improving the dehumidification performance of the dehumidification rotor; in order to ensure that the final outlet temperature of the treated air meets the requirements, an auxiliary refrigeration system is set; in order to ensure the regeneration temperature To meet the requirements, an auxiliary electric heater is installed before each treatment air enters the dehumidification rotor; according to the high temperature of the regeneration exhaust air of the dehumidification rotor and the considerable condensation heat of the refrigeration cycle, the waste heat and condensation heat of the regeneration exhaust air are recycled and utilized.

As shown in Figure 1, the air conditioning system consists of a high-temperature refrigerant system, an auxiliary refrigeration system, an auxiliary electric heating system, double dehumidification wheels, a plate heat exchanger and a fan system. The high-temperature cold coal system is composed of five pre-cooling units, a circulating water pump 24, five flow regulating valves and a cooling source 25. The five pre-cooling units are respectively the first pre-cooling unit 1, the second pre-cooling unit 3, the third pre-cooling unit 5, the fourth pre-cooling unit 7 and the fifth pre-cooling unit 8 according to the flow direction of the processing air. The five flow regulating valves corresponding to the cold units are the first flow regulating valve 20 , the second flow regulating valve 22 , the third flow regulating valve 23 , the fourth flow regulating valve 21 and the fifth flow regulating valve 19 .

The high-temperature refrigerant prepared by the high-temperature cooling source 25 is driven by the circulating water pump 24, and the flow rate entering the pre-cooling unit is adjusted through each flow regulating valve according to the temperature of the corresponding pre-cooling air of the pre-cooling unit, and then the flow rate of the pre-cooling unit is adjusted with the processing air from the pre-cooling unit. Sensible heat is exchanged and then returned to the high-temperature cold source 25 .

The auxiliary refrigeration system is composed of a condenser 10, an evaporator 9, a compressor 17 and a throttle valve 18, wherein the evaporator 9 performs final cooling on the processed air to meet the requirements of the air supply temperature, and the condensation heat of the condenser 10 is Utilize as regeneration heat.

The auxiliary electric heating system is composed of a first auxiliary electric heater 12, a second auxiliary electric heater 13, a third auxiliary electric heater 14 and a fourth auxiliary electric heater 15, and each auxiliary electric heater is regenerated according to its outlet The temperature adjusts the size of its own power to ensure that the regeneration temperature meets the requirements.

The double dehumidification rotor includes the first dehumidification rotor 2 and the second dehumidification rotor 4. Each dehumidification rotor is divided into four areas equally. The dehumidification area and the drying area are distributed sequentially, that is, the opposite corner areas are the same functional areas. The plate heat exchange 11 recycles and regenerates the waste heat of the exhaust air and uses it as regeneration heat; the fan system is composed of a blower 6 and a regeneration blower 16, and the blower 6 and the regeneration blower 16 provide power for the flow of the treatment air and the regeneration air respectively.

As shown in Figure 1, combined with Figure 2, the specific process is explained according to the psychrometric chart of the air treatment process. The process of air treatment is as follows: the dehumidified air a is dry-cooled by the first pre-cooling unit 1 first, and then becomes a state point b with a lower temperature, and then sent to the dehumidification zone I of the first dehumidification wheel 2, after being adsorbed and dried, Due to the release of adsorption heat, it becomes a state point c with a higher temperature, and then it is sent to the second pre-cooling unit 3 to pre-cool and cool down to a state point d with a lower temperature, and then sent to the dehumidification zone I of the second dehumidification wheel 4 Among them, after adsorption and drying, due to the release of adsorption heat, it becomes a state point e with a higher temperature, and then it is sent to the third pre-cooling unit 5 to pre-cool and lower the temperature to become a state point f with a lower temperature, which is driven by the blower and sent to the third pre-cooling unit 5. In the dehumidification zone III of the second dehumidification wheel 4, after adsorption and drying, due to the release of adsorption heat, it becomes a state point g with a higher temperature, and then it is sent to the fourth precooling unit 7 for precooling and cooling, and then becomes a state with a lower temperature Point h, then sent to the dehumidification zone III of the first dehumidification runner 2, after adsorption and drying, due to the release of adsorption heat, it becomes a state point i with a higher temperature, and then sent to the fifth precooling unit 8 for precooling and cooling. become a state point j with a lower temperature, and finally cool down through the evaporator 9 to become a state point k that meets the air supply requirements.

As shown in Figure 1, the regeneration air process is as follows: the regeneration air is heated by the condenser 10 and then sent to the plate heat exchanger 11 for sensible heat exchange with the hotter regeneration exhaust air, and then sent to the first auxiliary power plant after further temperature rise. The heater 12 is heated to the regeneration temperature and then sent to the regeneration zone II of the first dehumidification rotor 2. After the regeneration zone II is desorbed and dehumidified to restore the dehumidification capacity, it becomes regeneration air with a lower temperature, and then sent to the second After the auxiliary electric heater 13 heats up to the regeneration temperature, it is sent to the regeneration zone II of the second dehumidification rotor 4, so that the regeneration zone II desorbs and dehumidifies and restores the dehumidification capacity, and becomes the regeneration air with a lower temperature, and then It is sent to the third auxiliary electric heater 14, heated to the regeneration temperature, and then sent to the regeneration zone IV of the second dehumidification rotor 4, so that the regeneration zone IV desorbs and dehumidifies to restore the dehumidification capacity, and becomes the regeneration air with a lower temperature. , and then sent to the fourth auxiliary electric heater 15, heated up to the regeneration temperature and then sent to the regeneration zone IV of the first dehumidification runner 2, so that the regeneration zone IV desorbs and dehumidifies to restore the regeneration capacity, and finally the regeneration fan 16 The drive is sent into the plate heat exchanger 11 to exchange sensible heat with the regeneration air at a lower temperature and then discharged out of the system.

Claims (2)

1. a kind of recovery type heat double runner level Four dehumidifier/air-conditioning system with high temperature refrigerant cooling, it is characterized in that, the dehumidification air conditioner System includes high temperature refrigerant system, auxiliary cooling system, auxiliary electrical heater system, two desiccant wheels, heat-exchangerss of the plate type (11) and blower fan system,

The cold coal measures system of high temperature is by five pre-cooling units, water circulating pump (24), five flow control valves and high temperature low-temperature receiver in parallel (25) form, five pre-cooling units are sequentially distributed to form processing air pipe line by processing air-flow direction, each pre-cooling unit Flow control valve, five pre-cooling units, water circulating pump (24), five flow control valves and high temperature low-temperature receiver (25) are correspondingly provided with respectively Form closed cycle；

Auxiliary cooling system is made up of condenser (10), evaporator (9), compressor (17) and choke valve (18), evaporator (9) position At the air outlet slit of last pre-cooling unit, condenser (10) and heat-exchangers of the plate type (11), four electrical auxiliary heaters, Regeneration blower fan (16) is sequentially connected；

Auxiliary electrical heater system is made up of four electrical auxiliary heaters, four electrical auxiliary heaters by regeneration air flowing direction according to Secondary distribution forms regeneration air pipeline；

Each desiccant wheel all deciles divide four regions into, have two dehumidifying areas and dry section and dehumidifying area and dry section order are divided Cloth, vertical angles region are identical function area；Processing air pipe line passes through renewing zone by the area that dehumidifies, regeneration air pipeline；

Blower fan system is made up of pressure fan (6) and regeneration blower fan (16), and pressure fan (6) and regeneration blower fan (16) are respectively to handle sky The flowing of gas and regeneration air provides power.

2. the recovery type heat double runner level Four dehumidifier/air-conditioning system as claimed in claim 1 with high temperature refrigerant cooling, its feature It is that the quantity of desiccant wheel is 2+N, the quantity of electrical auxiliary heater is 4+2N, and the quantity of pre-cooling unit is 5+2N, stream The quantity of adjustable valve is 5+2N, and N is the quantity of the desiccant wheel newly increased.