Waste heat generating system and generating method

Abstract

The invention discloses a waste heat generating system and a generating method. The generating system generates power by using the heat energy stage-stored in a multi-stage heat energy storage system; the generating system comprises a generator, a steam turbine, an ammonia turbine and an absorption heat pump; the multi-stage heat energy storage system delivers steam to the steam turbine, and the steam turbine converts the heat energy into dynamic mechanical energy and drives the generator to convert the mechanical energy into electrical energy; the absorption heat pump adopts ammonia-water as working medium, and converts the low-quality heat energy of the steam at the tail end of an output of the steam turbine into higher-quality heat energy; and the heat energy storage system provides a high-quality driving heat source for the heat pump so that a large amount of mixed solution of concentrated ammonia-water is evaporated under high pressure to form high-pressure saturated ammonia, and the high-pressure saturated ammonia drives the ammonia turbine to convert the pressure produced by the ammonia into mechanical energy, and delivers the mechanical energy to the generator. The generating system and the generating method overcome the defects that the heat-electricity conversion efficiency in the conventional waste heat generating process is low and the like, and achieve the purposes of high quality, high efficiency and low consumption.

Description

technical field [0001] The invention relates to the field of recovery and utilization of waste heat in iron and steel metallurgical processes; in particular, it refers to a waste heat power generation system that uses waste heat generated in the process of slag treatment to generate electricity. Background technique [0002] Iron and steel metallurgical process - blast furnace ironmaking, converter steelmaking and other processes produce a large amount of smelting slag at a rate of 30-40% of the steel output every year, with an annual output of hundreds of millions of tons globally, and the heat energy taken away by it is equivalent to standard More than 20 million tons of coal, equivalent to 15 billion yuan. If it can be used effectively, it will be equivalent to reducing the energy consumption of more than 20 million tons of standard coal in the world every year, and it will be a great contribution to human energy conservation and environmental protection. [0003] Since ...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: to provide a waste heat power generation system and power generation method, which can solve the problems of low heat-to-electricity conversion efficiency in the traditional waste heat power generation process, and achieve the purpose of high efficiency, low consumption, and less heat dissipation

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