The second type of lithium bromide absorption and compression composite high temperature heat pump system and working method

Abstract

The present invention provides a second-type lithium bromide absorption and compression compound high-temperature heat pump system, which includes an evaporator, a first water vapor compressor, a water vapor absorber, a first throttle valve, a solution regenerator, a generator, and a solution pump , a condenser, a water pump, and a second water vapor compressor and a waste heat heat exchanger. The system can increase the pressure difference and temperature difference between the evaporator and the water vapor absorber through the first water vapor compressor, thereby increasing the heat supply temperature of the absorber, which is realized by the second water vapor compressor and the waste heat heat exchanger For the heating and reuse of low-temperature waste heat resources, the system expands the waste heat recovery temperature of the original second-type lithium bromide absorption heat pump from 80°C to 100°C and the heating temperature from 90°C to 150°C to the waste heat recovery temperature of 20°C to 100°C. The heating temperature ranges from 90°C to 170°C, which further increases the scope of application of the system, realizes effective recovery and utilization of waste heat at different temperature ranges, saves energy, and reduces energy consumption in industrial production processes.

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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