Steam heat pump for heat fluid regenerative flash evaporation circulation

Abstract

The system integrates energy-saving technologies such as a heat exchanger, heating throttling flash evaporation water supplementing circulation and a jet type heat pump to achieve systematicness and economy of the energy-saving technologies, the heat exchanger recovers heat fluid waste heat to replace a primary energy source to drive the heating throttling flash evaporation water supplementing circulation, low-pressure saturated water vapor is directly generated, and the heat-fluid heat-regeneration flash evaporation circulation steam heat pump is used for heat recovery of the heat-fluid heat-regeneration flash evaporation water supplementing circulation. The pressure reduction potential energy and the temperature reduction sensible heat of the high-pressure water vapor of the pipe network are recycled by the jet type heat pump, so that the low-pressure saturated water vapor is injected and mixed, and medium-pressure water vapor is generated; and meanwhile, investment and power consumption of a water vapor compressor are avoided, so that the initial investment of the energy-saving system is reduced exponentially, and the operation cost of the energy-saving system is reduced exponentially.

Description

(1) Technical field [0001] The invention relates to a method of recovering the waste heat of 100-900°C hot fluid by a heat exchanger to drive a heating and throttling flash evaporation water replenishment cycle, so as to continuously flash to generate 90-120°C saturated water vapor, and then the water vapor at a gauge pressure of 5-16 barg passes through the water vapor. The thermal compression jet heat pump ejects, mixes and diffuses to generate water vapor with a gauge pressure of 1 to 6 barg. (2) Background technology [0002] Current status of energy-saving technologies for recovering waste heat and pressure in the industrial energy-saving market: [0003] 1. The heat exchanger recovers the waste heat of the hot fluid: the heat exchanger recovers the latent heat of condensation and or the sensible heat of cooling of the high-temperature gaseous thermal fluids such as boiler flue gas, generator flue gas, engine flue gas, rectification tower top gas, and aldehyde gas. , c...

AI Technical Summary

Problems solved by technology

[0010] To sum up, in the existing waste heat and pressure recovery technology: although the heat exchanger recovers the waste heat of the hot fluid, it does not directly generate water vapor; although the steam generator generates water vapor, it must be driven by primary energy; the high-pressure water vapor in the pipe network At the end of the user, in order to increase the latent heat of condensation heating by about 10%, it is necessary to lose decompression potential energy and desuperheating sensible heat as a cost; although the water vapor compressor can compress low-pressure water vapor to generate high-pressure water vapor, it needs high-grade electric energy to drive ; so it is difficult to independently realize the economy of energy-saving technology

Images