CN102052715B - Multi-stage M-shaped air way liquid desiccant dehumidification air-conditioning system utilizing ultrasonic atomization technology - Google Patents

Abstract

The invention relates to a multi-stage M-shaped air channel solution dehumidification air-conditioning system utilizing ultrasonic atomization technology, which belongs to the technical field of air-conditioning energy saving. The invention changes the structure of the traditional solution dehumidifier and adopts multi-stage M-shaped air passages instead of dehumidification fillers. Ultrasonic technology is used to atomize the salt solution, and the humid air to be treated fully contacts with the atomized salt solution particles in the dehumidification air-conditioning box for heat and mass exchange. The M-shaped air channel structure makes full use of the building space and increases the gas-liquid contact reaction time, while the ultrasonically atomized salt solution particles increase the gas-liquid contact area. Compared with the traditional packing dehumidification air-conditioning system, the present invention has the biggest advantages of high utilization rate of building space, low system resistance, increased gas-liquid contact area and gas-liquid reaction time, and improved solution dehumidification efficiency, thereby significantly reducing air-conditioning energy consumption.

Description

Multi-stage M-shaped air channel solution dehumidification and air conditioning system using ultrasonic atomization technology

Technical field:

The invention relates to a solution dehumidification air-conditioning system, in particular to a multi-stage M-shaped air channel solution dehumidification air-conditioning system utilizing ultrasonic atomization technology. The utility model belongs to the technical field of air conditioning and energy saving.

Background technique:

Dehumidification and air conditioning systems consume a lot of energy when creating a comfortable working and living environment for humans. Studies have shown that the dehumidification energy consumption of air conditioning in summer accounts for 20%-40% of the entire air treatment energy consumption. Therefore, the energy saving of dehumidification system plays a decisive role in the energy saving of air conditioning. Compared with the traditional cooling dehumidification air conditioner, the power consumption of the solution dehumidification air conditioner system is only 25%, and it can make good use of low-grade heat sources such as solar energy and industrial waste heat. The system design and structure are also very flexible. It can also be used in conjunction with traditional air conditioning systems to effectively reduce its energy consumption; at the same time, the dehumidification solution used can effectively remove air pollutants and improve indoor air quality. Therefore, solution desiccant air conditioners have been extensively researched and applied in recent years due to their huge advantages.

The dehumidifier is the core component of the solution dehumidification system, and its structure is one of the key factors affecting the dehumidification performance. Generally, the dehumidifier is required to have the following characteristics: 1. The solid phase resistance should be small; 2. The specific surface area of the filler should be large. Filled dehumidifier is the most widely used dehumidifier at present, and scholars at home and abroad are constantly researching to improve its dehumidification performance. In the article "Experimental Research on Liquid Dehumidification Characteristics" (Acta Solaris Sinica, 2000, 21(4): 391-395), Li Weiyi and others proposed a structured packing with corrugated orifice plates, which can increase the specific surface area of the packing. Gandhidasan et al. proposed a structured filler in the article "Evaluation of heat and mass transfer coefficients in agauze-type structured packing air dehumidifier operating with liquid desiccant" (International Journal of Refrigeration, 2002, 25(3): 330-339). The packing has better heat and mass transfer performance for air dehumidification, and it is pointed out that the structured packing has a smaller pressure drop. However, it is undeniable that increasing the specific surface area of the filler will increase the solid phase resistance accordingly. Sun Hejiang and others also clearly pointed out in the article "Experiment on Heat and Mass Transfer Performance of Metal Filling for Air Conditioning" (Journal of Tianjin University Vo1.38No.6Jun.2005): "The experiment shows that the specific surface area of the filler has a great influence on the heat and mass transfer of the filler. The impact on the performance is relatively large. But the increase of the specific surface area will lead to a significant increase in the resistance of the filler. Therefore, we cannot blindly emphasize the improvement of the thermal performance of the filler by increasing the specific surface area of the filler.”

The pursuit of high specific surface area and small solid phase resistance makes the processing of packing more difficult and the production cost increases; at the same time, in order to improve the comprehensive dehumidification efficiency, the multi-stage packing dehumidification tower takes up a large building space. In addition, in the existing technology, the application number is 200810041926.X, and the name is the invention patent of the composite solution dehumidification system based on ultrasonic atomization technology. Effect. However, it still has the disadvantages of large system resistance, complex structure, large space occupation, and limited dehumidification efficiency, so the further development of packing dehumidification technology is limited.

Invention content:

In order to overcome the deficiencies and defects of the prior art, the present invention proposes a multi-stage M-shaped air channel solution dehumidification and air conditioning system using ultrasonic atomization technology.

The present invention is realized through the following technical proposals: the present invention includes an air inlet pipe, a dehumidification air-conditioning box, an exhaust pipe, a defogging device, two salt solution atomization devices, an ultrasonic generator, a dilute solution tank, a first solution pump, a regeneration device, a concentrated solution cylinder and a second solution pump, wherein the interior of the dehumidification and air conditioning box is a multi-stage M-shaped air channel. Two ultrasonic salt solution atomization devices are made of corrosion-resistant alloy materials and installed on the top of the dehumidification air-conditioning box respectively. The signal output ends of the ultrasonic generator are respectively connected with the signal receiving ends of two ultrasonic saline solution atomization devices. The air inlet pipe and the air exhaust pipe are respectively installed on both sides of the upper part of the dehumidification air-conditioning box. The air inlet pipe communicates with the air to be treated, the defogging device is installed inside the exhaust pipe, and the exhaust pipe discharges the treated air. The dilute solution tank is located under the dehumidification air-conditioning box, and the three solution outlets at the bottom of the dehumidification air-conditioning box communicate with the dilute solution tank, and the dehumidification air-conditioning box is supported by a bracket installed in the dilute solution tank. The outlet of the dilute solution tank is connected to the inlet of the regeneration device through the first solution pump, and the outlet of the regeneration device is connected to the inlet of the concentrated solution cylinder. Inlet connection for nebulizer. Concentrated solution adopts calcium chloride, lithium chloride, lithium bromide or their mixed solutions.

The ultrasonic salt solution atomization device receives the ultrasonic signal generated by the ultrasonic generator, and atomizes the concentrated salt solution into salt mist particles. In the dehumidification and air-conditioning box, the wet air to be treated fully contacts with the atomized particles of the salt solution to exchange heat and mass. The atomized particles of the salt solution absorb the moisture in the humid air and become thinner, and gradually settle at the bottom of the dehumidification and air-conditioning box and enter the dilute solution tank, the dilute solution is regenerated into a concentrated solution through the regeneration device, and is continuously recycled. After removing the liquid particles that have not settled down with the demisting device, the dry air is sent into the air-conditioned room.

Beneficial effects of the present invention: the atomized particles of salt solution produced by ultrasonic waves replace fillers, and the solid-phase resistance in the dehumidification air-conditioning box is significantly reduced. At the same time, the atomization of salt solution greatly increases the specific surface area produced by the solution of the same quality, and the gas-liquid contact area Effective promotion. In addition, the M-shaped air channel makes full use of the building space, effectively prolonging the travel distance of the atomized particles of the salt solution entrained by the humid air, and greatly increasing the gas-liquid reaction time. Compared with the traditional packing dehumidification air-conditioning system, the present invention has the biggest advantages of high utilization rate of building space, low system resistance, increased gas-liquid contact area and gas-liquid reaction time, and improved solution dehumidification efficiency, thereby significantly reducing air-conditioning energy consumption.

Description of drawings:

Fig. 1 is the schematic diagram of the dehumidification air-conditioning system of ultrasonic atomization solution of the present invention:

In the figure, 1 air inlet pipe, 2 dehumidification air-conditioning box, 3 exhaust pipe, 4 defogging device, 5 ultrasonic salt solution atomizing device, 6 ultrasonic generator, 7 dilute solution tank, 8 first solution pump, 9 regeneration device, 10 concentrated solution cylinders, 11 second solution pumps.

Detailed ways:

The concrete implementation of the present invention is described further below in conjunction with accompanying drawing:

As shown in Figure 1, the present invention comprises air inlet duct 1, dehumidification air conditioning box 2, exhaust duct 3, defogging device 4, two saline solution atomization devices 5, ultrasonic generator 6, dilute solution tank 7, the first Solution pump 8, regeneration device 9, concentrated solution tank 10 and second solution pump 11, wherein the dehumidification air conditioning box 2 adopts a cubic structure box made of corrosion-resistant PVC material, and the interior is divided into 2~ 3-stage M-shaped air channel. Two ultrasonic salt solution atomization devices 5 are made of corrosion-resistant alloy materials, and are respectively installed on the top of the dehumidification air-conditioning box 2 . The signal output ends of the ultrasonic generator 6 are respectively connected to the signal receiving ends of two ultrasonic saline solution atomization devices 5 . The air inlet pipe 1 and the air exhaust pipe 3 are installed on both sides of the upper part of the dehumidification and air conditioning box 2 respectively. The air inlet pipe 1 communicates with the air to be treated, the defogging device 4 is installed inside the exhaust pipe 3, and the exhaust pipe 3 discharges the air to be processed. The dilute solution tank 7 is located below the dehumidification air-conditioning box 2, and the three solution outlets at the bottom of the dehumidification air-conditioning box 2 communicate with the dilute solution tank 7, and the dehumidification air-conditioning box 2 is supported by a bracket installed in the dilute solution tank 7. The outlet of the dilute solution tank 7 is connected to the inlet of the regenerating device 9 through the first solution pump 8, and the outlet of the regenerating device 9 is connected to the inlet of the concentrated solution tank 10. The concentrated solution tank 10 contains a strong salt solution, and its outlet is passed through the second solution pump 11 They are respectively connected to the inlets of two ultrasonic saline solution atomization devices 5 . The salt solution adopts calcium chloride, lithium chloride, lithium bromide or a mixed solution thereof.

When the dehumidification and air-conditioning system starts to work, two ultrasonic salt solution atomization devices 5 receive the ultrasonic signals generated by the ultrasonic generator 6, and generate ultrasonic vibrations in the range of 44-47 kHz, which atomize the concentrated salt solution into diameters of about Salt mist particles of 30-50 microns are sent into the dehumidification air-conditioning box 2. The humid air to be treated is in full contact with the atomized particles of the salt solution in the multi-stage M-shaped air channel for heat and mass exchange. The atomized particles become thinner after absorbing water, and gradually settle at the bottom of the dehumidification air-conditioning box 2 and enter the dilute solution tank 7. After the dilute solution is regenerated into a concentrated solution by the regeneration device 9, the second solution pump 11 is sent to two ultrasonic salt solution atomization devices 5 for recycling. After the treated air passes through the demisting device 4 to remove the unsettled liquid particles, it is discharged through the exhaust pipe 3 to obtain the dry air required for the air-conditioned room.

Claims (4)

1. A multi-stage M-shaped air channel solution dehumidification air-conditioning system using ultrasonic atomization technology, including air inlet pipe (1), dehumidification air-conditioning box (2), exhaust pipe (3), demisting device (4), Two salt solution atomization devices (5), ultrasonic generator (6), dilute solution tank (7), first solution pump (8), regeneration device (9), concentrated solution tank (10) and second solution pump (11), characterized in that the dehumidification and air conditioning box (2) is a cubic structure box, and the inside is divided into 2 to 3 levels of M-shaped air passages by baffles; two ultrasonic salt solution atomization devices (5) are respectively installed in the dehumidification and air conditioning The top of the box (2); the signal output ends of the ultrasonic generator (6) are respectively connected to the signal receiving ends of two ultrasonic saline solution atomization devices (5), and the ultrasonic generator (6) produces a range of 44 ~ 47kHz Ultrasonic vibration; the air inlet pipe (1) and the exhaust air pipe (3) are respectively installed on both sides of the upper part of the dehumidification air conditioning box (2); the air inlet pipe (1) communicates with the air to be treated, and the defogging device (4) In the exhaust pipe (3); the dilute solution tank (7) is located under the dehumidification air-conditioning box (2), and the three solution outlets at the bottom of the dehumidification air-conditioning box (2) communicate with the dilute solution tank (7), and the dehumidification air-conditioning box (2) ) is supported by a bracket installed in the dilute solution tank (7); the outlet of the dilute solution tank (7) is connected to the inlet of the regeneration device (9) through the first solution pump (8), and the outlet of the regeneration device (9) is connected to the concentrated solution cylinder ( 10) Inlet connection, concentrated solution cylinder (10) contains concentrated saline solution, its outlet is respectively connected to the inlets of two ultrasonic saline solution atomization devices (5) through the second solution pump (11), and the ultrasonic saline solution mist The atomization device (5) receives the ultrasonic vibration in the range of 44-47kHz generated by the ultrasonic generator (6) to atomize the concentrated salt solution into salt spray particles with a diameter of about 30-50 microns, and send them into the dehumidification air-conditioning box (2). 2. The multi-stage M-shaped air channel solution dehumidification and air conditioning system using ultrasonic atomization technology according to claim 1, characterized in that the box and internal baffles of the dehumidification and air conditioning box (2) are made of corrosion-resistant PVC material. 3. The multi-stage M-shaped air channel solution dehumidification and air conditioning system using ultrasonic atomization technology according to claim 1, characterized in that the ultrasonic salt solution atomization device (5) is made of corrosion-resistant alloy materials . 4. The multi-stage M-shaped air channel solution dehumidification air-conditioning system utilizing ultrasonic atomization technology according to claim 1, characterized in that said salt solution is calcium chloride, lithium chloride, lithium bromide or a mixed solution thereof. the

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