Multifunctional heat exchanger and cascade absorption system thereof

Abstract

The invention discloses a multifunctional heat exchanger in the technical field of absorption type circulation. The multifunctional heat exchanger comprises a shell, the side wall of the shell is provided with an air outlet, the right side wall of the shell is also provided with a liquid inlet, a high-pressure gaseous refrigerant inlet, a high-pressure liquid refrigerant outlet, a barren liquor inlet, a low-pressure gaseous refrigerant inlet and a rich liquor outlet, and a first horizontal plate and a third horizontal plate are fixedly connected with the inner side wall of the shell. Through the arrangement of the liquid inlet, a long heat exchange pipe, a first partition plate and other structures, evaporation outside the pipe, absorption inside the pipe and condensation are achieved, heat exchange is directly conducted through the long heat exchange pipe and a short heat exchange pipe, efficiency is high, two heat exchangers are combined into one heat exchanger, equipment is saved, and meanwhile, indirect heat exchange of original circulating water and circulating power required by the circulating water are omitted, so that barren liquor flows from the upper part to the lower part under the action of gravity, ammonia gas rises from the lower part to the upper part and flows back, and the best absorption effect can be achieved.

Description

technical field [0001] The invention relates to the technical field of absorption circulation, in particular to a multifunctional heat exchanger and a cascade absorption system thereof. Background technique [0002] Waste heat refrigeration is a technology that uses the 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. Waste heat refrigeration can help us recover waste heat, save energy and reduce costs. [0003] Traditional compression refrigeration is a conversion process of electrical energy. The compressor sucks the low-pressure and low-temperature refrigerant gas (such as Freon) generated in the evaporator into the cylinder, and after being compressed, it becomes a gas with a higher pressure and temperature and is discharged into the condenser. It is condensed into a liquid, and then enters the evaporator through a pressure regulating v...

AI Technical Summary

Problems solved by technology

The compression process needs to consume a lot of power

[0004] In order to save energy, the public document with the application number CN201310521246.9 proposes a heat medium water-driven ammonia and lithium bromide integrated absorption refrigeration device and method. In this public document, the integrated absorption refrigeration technology of ammonia and lithium bromide realizes The purpose of using 90-120°C heat medium water to prepare -30-19°C refrigerant is to save heat, improve refrigeration efficiency, and reduce refrigeration costs compared with conventional steam-driven ammonia and lithium bromide absorption refrigeration processes, but , the device needs to be equipped with multiple links and multiple heat exchange devices. This process also requires brine and driving pumps to drive the cycle, which consumes extra energy. In order to solve these problems, this application combines the existing technology to carry out a new Process design, propose a multifunctional heat exchanger and its cascade absorption system

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