A multifunctional heat exchanger and its cascade absorption system

Abstract

The invention discloses a multifunctional heat exchanger in the technical field of absorption cycle, which comprises a casing, the side wall of the casing is provided with an air outlet, the right side wall of the casing is also provided with a liquid inlet, a high-pressure gaseous refrigerant Inlet, high-pressure liquid refrigerant outlet, lean liquid inlet, low-pressure gaseous refrigerant inlet, rich liquid outlet, the inner wall of the shell is fixedly connected with the first horizontal plate and the third horizontal plate, by setting the liquid inlet, long heat exchange The structure of the tube and the first partition plate realizes evaporation outside the tube, absorption and condensation inside the tube, heat exchange directly through the long heat exchange tube and the short heat exchange tube, and the efficiency is high. The two heat exchangers are combined into one heat exchange The device saves equipment, and at the same time saves the indirect heat exchange of the original circulating water and the circulating power required by the circulating water, so that the lean liquid flows from the top to the bottom under the action of gravity, while the ammonia gas rises from the bottom to the top, countercurrent, Can play the best absorption effect.

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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