Heat supply system for directly recovering sewage multi-section flashing steam waste heat by using multiple sections of absorption heat pumps

Abstract

The invention relates to a heat supply system for directly recovering sewage multi-section flashing steam waste heat by using multiple sections of absorption heat pumps, which is used for recovering sewage flashing steam waste heat. The system comprises 1, 2, ..., and N independent sealing chambers and the multiple sections of absorption heat pumps, wherein the multiple sections of absorption heat pumps comprise respective 1, 2, ..., and N generators, 1, 2, ..., and N condensers, 1, 2, ..., and N absorbers and 1, 2, ..., and N evaporators; water steam which is formed by flashing sewage in the 1, 2, ..., and N independent sealing chambers and has different pressure from high pressure to low pressure enters 1, 2, ..., and N evaporator tubes sequentially by 1, 2, ..., and N flashing steam and is directly connected with the 1, 2, ..., and N evaporators of the multiple sections of absorption heat pumps; and flashing steam condensate outflows the 1, 2, ..., and N evaporator tubes and reflows to respective 1, 2, ..., and N liquid phase areas of the 1, 2, ..., and N independent sealing chambers sequentially by respective 1, 2, ..., and N flashing steam condensate. The system can reduce heat loss, improve the water-supply temperature of hot water and reduce investment and running cost.

Description

technical field [0001] The invention relates to a waste heat heating system for recovering sewage flash steam. It is used to recover the waste heat of sewage flash steam. Background technique [0002] People need a lot of hot water for heating in the production process and life, and generally need to consume primary energy to produce it. At the same time, there is a large amount of hot water waste heat in the production process, but some hot water has water quality problems, and the water contains solid particles. (Such as steel slag flushing water, etc.), corrosive components, etc., it is called sewage. Due to the problems of corrosion, fouling, wear and other problems in sewage, ordinary heat exchangers cannot realize the heat extraction process. In order to recycle the waste heat of this part of sewage without wasting it in vain, there are currently multi-stage flash evaporation of sewage for heat exchange. system way like figure 1 The waste heat of sewage is extracted...

AI Technical Summary

Problems solved by technology

However, this method requires facilities such as heat exchange tube bundles, water inlet chamber, water outlet chamber, and hot water circulation pump to recover the condensation heat of flash evaporation of sewage. This part of the device requires initial investment and power consumption of the water pump, because it is an indirect extraction The waste heat of flash evaporation of sewage, the heat exchange of flash steam and hot water will cause a certain temperature loss, which will affect the temperature rise of hot water for heating and other unfavorable factors

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