Injection and falling film combined absorption tower and absorption refrigeration system and operation method thereof

Abstract

The invention relates to a spraying and falling film combined absorption tower and an absorption refrigeration system and an operation method thereof, and belongs to the technical field of waste heat utilization, the spraying and falling film combined absorption tower comprises a tower body, a falling film absorber, at least one group of solution spraying absorbers and at least one group of spraying cooling absorption pipes are arranged in the tower body, and the spraying cooling absorption pipes are partially located in the falling film absorber; outlets of the group of solution injection absorbers are connected with inlets of the group of injection cooling absorption pipes, the solution injection absorbers inject gaseous refrigerants into the injection cooling absorption pipes by utilizing external mixed solution flow, a barren liquor spray head is arranged at the top of the tower body, and barren liquor sprayed by the barren liquor spray head cools the solution injection absorbers and then enters the falling film absorber. According to the invention, the solution jet absorber, including the falling film cooling absorption pipe, and the falling film absorber are installed in the same equipment, so that the absorption rate of the absorption equipment is improved, the equipment structure is optimized, and the cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of waste heat utilization, and in particular relates to an absorption tower combined with injection and falling film, an absorption refrigeration system and an operation method thereof. Background technique [0002] Waste heat refrigeration is a technology that uses gas or waste gas, waste liquid in the production process, and the heat discharged by some power machinery as energy to drive compression or absorption refrigerators for refrigeration. Compared with traditional compression refrigeration, it can save energy and reduce costs. . [0003] The refrigerant solution in the absorber in the waste heat absorption refrigeration system will release a large amount of heat when absorbing the gaseous refrigerant, which will affect the absorption rate. Therefore, the heat needs to be removed quickly, and the absorption pressure must be increased as much as possible to increase the absorption rate. . Traditional...

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Problems solved by technology

Traditional absorbers use various heat exchange absorption equipment, including falling film absorbers for absorption, but only for heat exchange absorption, failing to increase the absorption pressure, the absorption refrigeration system hopes to reduce the pressure of the evaporator as much as possible to obtain lower refrigeration temperature, heat exchange and absorption equipment can not reduce the pressure and temperature of the evaporator; also use the ejector to absorb, but often adopt the way of first absorption and then cooling, the absorption of refrigerant solution in the ejector absorber fails to cool down in time and effectively, which affects Absorption rate

Moreover, the existing absorption refrigeration process adopts single-stage absorption, and it is generally difficult to completely absorb the gaseous refrigerant, which affects the refrigeration efficiency of the entire system, or it is absorbed by increasing the circulation of the absorption refrigerant solution, but it increases equipment investment and cost. power consumption

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