CN100595491C - Composite solution dehumidification system based on ultrasonic atomization technology - Google Patents

Abstract

The invention discloses a compound solution dehumidification system based on the ultrasonic atomization technology and belongs to the air-conditioning energy-saving technology field. The compound solution dehumidification system of the invention increases a solution atomization device on the basis of a traditional dehumidification tower, and the solution atomization device comprises an ultrasonicgenerator and an atomization chamber. Concentrated solution submerges an ultrasonic transducer, and the concentrated solution is mixed and fully contacted with air after the atomization by being subjected to the ultrasonic atomization effect in the atomization chamber and then enters the dehumidification tower. The air to be processed is subjected to preliminary dehumidification by using salt fogobtained by atomization, and the air after the preliminary dehumidification and the salt fog are sent to the dehumidification tower for being subjected to secondary dehumidification. The specific surface area in the tower is improved as the existence of the salt fog. Compared with the traditional solution dehumidification technology, the technology of the invention has the greatest advantage thatthe compound solution dehumidification system can not only reduce the requirements of the dehumidification tower on stuffing and reduce the cost of the dehumidification tower, but can also improve thesolution dehumidification energy efficiency rate by the salt fog.

Description

Composite solution dehumidification system based on ultrasonic atomization technology

Technical field:

The invention relates to a solution dehumidification system, in particular to a composite solution dehumidification system based on ultrasonic atomization technology. The utility model belongs to the technical field of air conditioning energy saving.

Background technique:

The power consumption of air conditioners can account for 40% of the total power consumption in summer in big cities such as Beijing and Shanghai. The investigation and research on air conditioning systems in civil buildings have found that the dehumidification energy consumption of air conditioners in summer accounts for 20%-40% of the entire air processing energy consumption, so it can be seen that , The energy saving of the dehumidification system plays a decisive role in the energy saving of the air conditioning system. In the dehumidification system, solution dehumidification can not only make good use of low-grade heat sources such as solar energy and industrial waste heat, but also the design and structure of the system can be very flexible. It can be used alone for the purpose of dehumidification, and can also be used in conjunction with traditional air conditioning systems. Use, effectively reduce its energy consumption; at the same time, the dehumidification solution used can eliminate bacteria and microorganisms in the air, which helps to improve indoor air quality. Therefore, solution dehumidification technology has received extensive attention and research in recent years due to its incomparable advantages.

Among them, the dehumidification tower module with filler is the basic heat and mass transfer unit in the solution dehumidification system, and also the basic component of the system. Multiple dehumidification tower modules can be combined to form a variety of different solution dehumidification system forms. The packed dehumidification tower can use a relatively simple geometric structure to achieve a large specific surface area, and has high heat and mass transfer efficiency. It is the most widely used dehumidification tower. Its main disadvantages are: 1. The dehumidification solution absorbs heat and heats up during dehumidification; 2. The air The pressure drop is larger when flowing through. Many scholars have done in-depth research on these two shortcomings. For the first point, some people have proposed an internal cooling dehumidification tower and a dehumidification tower for heat exchange and cooling of the dehumidification solution, which have achieved good results; for the second point, some scholars have continuously proposed new types of fillers with high specific surface areas. In the prior art, by Shi Jun, Zhang Weijiang in "Research on Metal Packing Type Direct Evaporative Air Cooler [J]" (Journal of Refrigeration, 1994 (4): 28-31) and Chen Ying in "A Honeycomb Two types of fillers were proposed in the article "Experimental Research on Paper Felt Fillers Used in Dehumidification Liquid Regeneration Process" (Journal of Refrigeration Vol.28, No.3 June.2007), but both articles also pointed out that although the two fillers The form greatly improves the specific surface area, but it does not solve the disadvantage that the wetted surface area of the filler increases with the increase of the filler height, but the pressure drop also increases. In addition, Sun Hejiang and You Shijun also clearly pointed out in the article "Experiments on Heat and Mass Transfer Performance of Metal Fillings for Air Conditioners" (Journal of Tianjin University Vol.38 No.6 Jun.2005): "The experiments show that the specific surface area of the filler has a great Heat transfer and mass transfer performance have a relatively large impact. However, the increase in specific surface area will lead to a significant increase in the resistance of the filler. Therefore, it is not possible to blindly emphasize the improvement of the thermal performance of the filler by increasing the specific surface area of the filler.”

Therefore, the further development of packing technology is greatly limited by the resistance requirements of dehumidification towers. In the process of packing design, it is necessary not only to increase its specific surface area, but also to reduce pressure loss and make it have good porosity. This series of requirements restricts the long-term development of packing technology. The surface area will inevitably increase the difficulty of filler research, as well as a series of problems such as increased cost and difficult processing. In such a case, how to improve the dehumidification system by combining new technologies, increasing the specific surface area of the dehumidification tower and improving the efficiency of the dehumidification tower is particularly important.

Invention content:

In order to overcome the deficiencies and defects of the prior art, the present invention provides a simple, easy-to-implement, and efficient composite solution dehumidification system based on ultrasonic atomization technology.

The present invention is realized through the following technical solutions: the present invention adds a solution atomization device on the basis of the traditional dehumidification tower, and the solution atomization device includes an ultrasonic generator and an atomization chamber, wherein the ultrasonic transducer in the ultrasonic generator is placed The bottom of the atomization chamber, the lower part of the atomization chamber is filled with concentrated solution, and the concentrated solution submerges the ultrasonic transducer. The air inlet of the atomization chamber communicates with the air to be treated, the air outlet of the atomization chamber communicates with the air inlet of the dehumidification tower, and the air outlet of the dehumidification tower discharges dehumidified air. The concentrated solution outlet of the atomization chamber is connected to the concentrated solution inlet of the solution tank of the dehumidification tower, and the dilute solution outlet of the solution tank of the dehumidification tower communicates with the concentrated solution inlet of the atomization chamber through a regeneration device.

The concentrated solution submerges the ultrasonic transducer, which converts electrical energy into mechanical vibration energy. Applying a resonant electrical signal to the transducer causes the transducer to generate ultrasonic vibrations in the range of 1-5MHZ. This ultrasonic vibration atomizes the salt solution into a diameter of 1 -10 micron salt spray particles; In the spray chamber, the concentrated solution atomized particles are mixed with air and fully contacted. The air is initially dehumidified in the section from the atomization chamber to the dehumidification tower. This dehumidification process is completely achieved by the dehumidification of atomized salt mist particles; the mixed gas of air and salt mist enters the dehumidification tower for secondary dehumidification. This dehumidification process is the same as Same as conventional solutions for dehumidification.

The beneficial effect of the invention is that the dehumidification specific surface area of the dehumidification tower is greatly increased because the air brings a large amount of salt mist into the dehumidification tower, and the ultrasonic atomization effect greatly increases the specific surface area of the salt solution of the same quality. Due to the presence of salt mist, the specific surface area inside the tower increases, which reduces the requirement for packing in the dehumidification tower, thus making it feasible to use packing with a small body surface area and high porosity in the packed tower. The increase in the porosity of the filler means that the resistance loss of the dehumidification tower is reduced, and the energy consumption is also reduced. Compared with the traditional solution dehumidification system, the technology of the present invention has the biggest advantage that it can not only reduce the requirement of the dehumidification tower for packing, reduce the cost of the dehumidification tower, but also improve the energy efficiency ratio of the solution dehumidification.

Description of drawings:

Fig. 1 is the schematic diagram of the compound solution dehumidification system based on ultrasonic atomization technology of the present invention:

In the figure, 1 atomization chamber inlet, 2 atomization chamber, 3 atomization chamber outlet, 4 dehumidification tower inlet, 5 packing, 6 dehumidification tower outlet, 7 regeneration device, 8 dehumidification tower, 9 dehumidification tower solution Tank, 10 solution pump, 11 nozzle, 12 ultrasonic generator, 13 ultrasonic transducer, 14 solution atomizing device.

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 includes a dehumidification tower 8 and a solution atomization device 14, wherein the dehumidification tower 8 is a traditional solution dehumidification device, and its form is a traditional adiabatic dehumidification tower, an adiabatic with a concentrated solution cooling heat exchange device Type dehumidification tower, or a dehumidification tower composed of multiple dehumidification tower modules. The solution atomizing device 14 comprises an ultrasonic generator 12 and an atomizing chamber 2, wherein the ultrasonic transducer 13 in the ultrasonic generator 12 is placed at the bottom of the atomizing chamber 2, and the bottom of the atomizing chamber 2 is equipped with a concentrated solution, and the concentrated solution is submerged The ultrasonic transducer 13 is made of a high-frequency piezoelectric ceramic sheet. The air inlet 1 of the atomization chamber communicates with the air to be treated, the air outlet 3 of the atomization chamber communicates with the air inlet 4 of the dehumidification tower, and the air outlet 6 of the dehumidification tower discharges the dehumidified air. The concentrated solution outlet at the lower part of the atomization chamber 2 is connected to the concentrated solution inlet of the solution tank 9 of the dehumidification tower, and the dilute solution outlet of the solution tank 9 of the dehumidification tower communicates with the concentrated solution inlet at the lower part of the atomization chamber 2 through the regeneration device 7 . The concentrated solution is lithium chloride, calcium chloride, triethylene glycol or a combination thereof.

At the beginning of dehumidification, the ultrasonic generator 12 works, and atomizes a part of the concentrated solution in the lower part of the atomization chamber 2 into salt mist to fill the upper space of the atomization chamber 2, mixes with the air to be treated and enters the dehumidification tower 8, and after dilution, falls into the solution tank of the dehumidification tower 9; the other part of the concentrated solution is directly transported to the solution tank 9 of the dehumidification tower, sprayed out by the nozzle 11 through the solution pump 10, and finally returns to the solution tank 9 of the dehumidification tower after wetting the filler 5. The two parts of the concentrated solution become a dilute solution after absorbing moisture and enter the regeneration device 7 for circulation.

Compared with the traditional solution dehumidification device, this solution cycle has more atomization links in the cycle of concentrated solution. The air to be treated first enters the atomization chamber 2, mixes with salt mist, and the humidity is initially reduced, and then enters the dehumidification tower 8, and the air coming out of the dehumidification tower outlet 6 is the dehumidified air.

Claims (4)

1. A compound solution dehumidification system based on ultrasonic atomization technology, comprising dehumidification tower (8), regeneration device (7), is characterized in that also comprising solution atomization device (14); Solution atomization device (14) comprises ultrasonic Generator (12) and atomization chamber (2), the ultrasonic transducer (13) in the ultrasonic generator (12) is placed at the bottom of the atomization chamber, and the bottom of the atomization chamber (2) is equipped with concentrated solution, and the concentrated solution is submerged The ultrasonic transducer (13), the air inlet of the atomization chamber (1) communicates with the air to be treated, the air outlet of the atomization chamber (3) communicates with the air inlet of the dehumidification tower (4), and the air outlet of the dehumidification tower (6) discharges To dehumidify the air, the concentrated solution outlet of the atomization chamber (2) is connected to the concentrated solution inlet of the dehumidification tower solution tank (9), and the dilute solution outlet of the dehumidification tower solution tank (9) passes through the regeneration device (7) and the atomization chamber (2) ) The concentrated solution inlets are connected. 2. The composite solution dehumidification system based on ultrasonic atomization technology according to claim 1, characterized in that the form of the dehumidification tower (8) is a traditional adiabatic dehumidification tower, a heat insulation dehumidification tower with a concentrated solution cooling heat exchange device A dehumidification tower or a dehumidification tower composed of multiple dehumidification tower modules. 3. The composite solution dehumidification system based on ultrasonic atomization technology according to claim 1, characterized in that the ultrasonic transducer is made of high-frequency piezoelectric ceramic sheets. 4. The composite solution dehumidification system based on ultrasonic atomization technology according to claim 1, characterized in that the concentrated solution is lithium chloride, calcium chloride, triethylene glycol or a combination thereof.

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