Tertiary reheating power generation system

Abstract

The invention provides a tertiary reheating power generation system, and relates to the field of power generation systems. The tertiary reheating power generation system comprises a boiler, an ultrahigh-pressure cylinder, a high-pressure cylinder, an intermediate-pressure cylinder, a low-pressure cylinder and a power generator; the ultrahigh-pressure cylinder, the high-pressure cylinder, the intermediate-pressure cylinder and the low-pressure cylinder are all in transmission connection with the power generator; a primary reheater and a secondary reheater are arranged in the boiler, a steam inlet of the boiler and a steam inlet of the ultrahigh-pressure cylinder are connected with a main steam pipeline, a primary reheating hot section pipeline is connected with a steam inlet of the primary reheater and a steam inlet of the high-pressure cylinder, and a secondary reheating hot section pipeline is connected with a steam inlet of the secondary reheater and a steam inlet of the intermediate-pressure cylinder; a steam inlet of the intermediate-pressure cylinder and a steam inlet of the low-pressure cylinder are connected with a tertiary reheating pipeline, the tertiary reheating pipeline is connected with a steam-steam heat exchanger in series, and the steam-steam heat exchanger and any one of the main steam pipeline, the primary reheating hot section pipeline and the secondary reheating hot section pipeline are connected with a heating steam source pipeline; and hot steam of the heating steam source pipeline in the steam-steam heat exchanger is used for heating steam of the tertiary reheating pipeline.

Description

technical field [0001] The invention relates to the technical field of power generation systems, in particular to a triple reheat power generation system. Background technique [0002] As the consumption situation of fossil energy is becoming more and more serious, thermal power units generally adopt the scheme of secondary reheating system, and at the same time, improve the operating parameters to improve the power generation efficiency of coal-fired thermal power units. [0003] For example, the Chinese invention patent application with the application publication number CN110030047A and the application publication date of 2019.07.19 discloses a three-time reheat power generation system and its working method, and specifically discloses that the system includes a primary reheater, a secondary reheater, Boiler with tertiary reheater, steam turbine, generator, condenser, cooling system, low pressure heater, high pressure heater and deaerator, the steam outlet of the boiler i...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above problems, the object of the present invention is to provide a three-time reheat power generation system to solve the problem that the existing three-time reheat power generation system adds a second-stage reheater to the original two-time reheat boiler body, increasing the boiler body The heating area, the furnace volume and the consumption of high-temperature pipelines, the investment cost is large, and the operation economy is poor.

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