Lithium bromide II adsorption and compression composite type high-temperature heat pump system and working method

Abstract

The invention provides a lithium bromide II adsorption and compression composite type high-temperature heat pump system. The system comprises an evaporator, a first water vapour compressor, a water vapour absorber, a first throttle valve, a solution reheater, a generator, a solution pump, a condenser, a water pump as well as a second water vapour compressor and a waste heat heating heat exchanger.The system can increase pressure difference and temperature difference between the evaporator and the water vapour absorber through the first water vapour compressor, so that a heat supply temperature of the absorber can be increased, and heating and reutilizing of low-temperature waste heat resources are realized through the second water vapour compressor and the waste heat heating heat exchanger. The system expands the waste heat recycling temperature of the original lithium bromide II absorption type heat pump to 20-100 DEG C from 80-100 DEG C, and expands the heat supply temperature to 90-170 DEG C from 90-150 DEG C, so that the range of application of the system is increased, effective recycling of waste heat at different temperature sections is realized, energy is saved, and energyconsumption in an industrial production process is reduced.

Description

technical field [0001] The invention relates to a second-type lithium bromide absorption and compression composite high-temperature heat pump system, which relates to the field of energy recovery and utilization. Background technique [0002] Since the 21st century, my country's energy recycling rate is still in a low state. Relevant data show that my country's energy utilization rate is only 33%, and more than 50% of industrial energy consumption is directly discarded as waste heat. In many industrial fields such as textiles, in addition to a large amount of waste heat resources, the process also consumes a large amount of heat energy to meet heating and preheating requirements. Most of the heat sources used are high-temperature water above 80°C or boiler steam above 100°C. [0003] Heat pump technology is an energy-saving technology that can recover useless low-grade heat energy and transform it into high-grade heat energy required by industry or life. Nowadays, heat pump...

AI Technical Summary

Problems solved by technology

However, since the second type of absorption lithium bromide heat pump system has higher requirements on the temperature of the driving waste heat source, the temperature requirement of the waste heat source is 60°C to 100°C, and the low temperature waste heat below 60°C cannot be effectively recycled, and the existing second type of absorption Type lithium bromide heat pump system can only meet the heat supply heat source temperature demand within 150 ℃, if the second type of lithium bromide absorption heat pump can reduce the low-temperature waste heat temperature requirements, and further increase the heat supply temperature that it can achieve, it will be able to be effectively promoted Its application fields of industrial waste heat recovery and utilization contribute to national industrial energy conservation and emission reduction

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