A device for improving the performance of ammonia water bromine injection heat pump based on electric drive membrane separation technology

Abstract

The invention discloses a device for improving the performance of an ammonia-water-bromine jet type heat pump based on the electric driven membrane separation technology. The device comprises a solution circulating system. The solution circulating system comprises an absorber (5), a solution pump (6), an injector (7), a solution heat exchanger (8), an electric driven membrane separator (9), a partial condenser (10) and a generator (11). The electric driven membrane separator (9) comprises two or more high-concentration ammonia-water-lithium bromide solution chambers, low-concentration ammonia-water-lithium bromide solution chambers and anion-cation exchange membranes. The device enhances the evaporation process of ammonia in the evaporator through the two-stage injector. The injector is started according to the specific working conditions. The utilization capacity of environmental heat is improved. Meanwhile, the device ensures that a ternary working medium improves the generation efficiency without affecting the absorption capacity through the electric driven membrane separation technology, the temperature utilization interval is expanded, and the utilization efficiency of industrial waste heat in the first kind of absorption heat pumps is improved.

Description

technical field [0001] The invention relates to a method and technology for electrically driving membrane separation to improve the performance of an ammonia-water-lithium bromide absorption-jet heat pump, which belongs to the technical field of heat pumps. Background technique [0002] As people pay more and more attention to energy shortage, the conversion of industrial waste heat has become an important research issue in energy utilization. The paper industry, chemical printing and dyeing, power station and other industries will produce a large amount of low-grade thermal wastewater with a temperature range of 60-90°C during the production process. The large amount of waste heat in this temperature range is difficult to be directly utilized, resulting in energy loss. The first type of absorption heat pump system can use high-temperature heat to generate a large amount of medium-temperature heat. It is an effective way to utilize industrial waste heat to drive the absorpti...

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Problems solved by technology

[0004] The ambient temperature in winter is low, and it is difficult for the evaporator to extract enough heat from the environment by using a heat source tower or a finned tube heat exchanger, so that the amount of ammonia evaporated is too small, and the coefficient of performance of the absorption heat pump is too low

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