Steam-water double-pressure waste heat power generation system

Abstract

The invention discloses a steam-water double-pressure waste heat power generation system. A steam turbine is connected to a first generator, and high-pressure steam flows into the steam turbine to dowork and then is converted into hot water in a steam condenser and flows into a hot water tank; an expansion machine is connected to a second generator; an evaporator, a preheater, an organic workingmedium condenser and an organic working medium pump are connected with the expansion machine; the evaporator is connected with a steam-water double-pressure waste heat boiler; the preheater is connected with the hot water tank; organic working medium and low-pressure hot water exchange heat in the evaporator to enable organic wording medium steam to flow into the expansion machine to do work; theorganic working medium steam after doing work is converted into organic working medium liquid through the organic working medium condenser; the hot water tank is connected with the steam-water double-pressure waste heat boiler; the steam-water double-pressure waste heat boiler is connected with a deaerator; and the deaerator is respectively connected with the steam-water double-pressure waste heatboiler through a third water pump and a fourth water pump, so that the hot water in the deaerator is capable of flowing back to the steam-water double-pressure waste heat boiler and respectively converted into the high-pressure steam and the low-pressure hot water for recycling.

Description

technical field [0001] The invention relates to the field of waste heat power generation systems, in particular to a steam-water dual-pressure waste heat power generation system. Background technique [0002] Steam-water dual-pressure waste heat boilers are widely used in industrial flue gas waste heat utilization technology. Steam-water dual-pressure waste heat boilers will have high-pressure steam and low-pressure hot water at the same time. However, single-pressure waste heat power generation technology, flash waste heat power generation technology and dual It is difficult to use high-pressure steam and low-pressure hot water simultaneously in high-pressure waste heat power generation technology. Among them, the single-pressure waste heat power generation technology is limited by a single pressure, which causes the exhaust gas temperature of the waste heat boiler to be too high, and the waste heat resources in the flue gas cannot be fully utilized; the flash waste heat po...

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Problems solved by technology

[0003] In order to solve the problem in the prior art that it is difficult to efficiently utilize the heat of high-pressure steam and low-pressure hot water in a steam-water dual-pressure waste heat boiler at the same time, the present invention provides a steam-water dual-pressure waste heat power generation system

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