Ultrahigh pressure primary reheat power generation system

Abstract

The invention provides an ultrahigh pressure primary reheat power generation system. The system involves a steam turbine and a combustion boiler, wherein the steam turbine is connected with a generator, and the steam turbine comprises a steam turbine high-pressure cylinder and a steam turbine low-pressure cylinder; and an evaporation water cooling wall, a swing burner, a wall-type reheater, a high-temperature superheater, a low-temperature superheater, a reheater, a economizer and an air preheater are arranged in the combustion boiler, wherein the air preheater is connected with a primary fanand a secondary fan, and a bottom flue of the combustion boiler is sequentially connected with a dust remover, an induced draft fan and a chimney. According to the system, the 13.7 MPa-540 DEG C ultrahigh pressure high temperature primary reheat system is creatively applied to coal-fired power stations with the grade below 50 MW, thereby greatly improving the efficiency and economic benefits of the power stations.

Description

technical field [0001] The invention belongs to the technical field of thermal power generation, and more specifically relates to an ultra-high voltage primary reheat power generation system. Background technique [0002] At present, small coal-fired power plants below 50 MW generally use high-temperature and high-pressure units, and the boilers of small coal-fired power plants below 50 MW use ultra-high pressure primary reheating, because the flue gas volume per unit fuel of the boiler is much smaller than that of biomass power plants and Gas-fired power plants bring huge difficulties to the arrangement of superheaters and reheaters and heat balance in the tail flue behind the furnace, which leads to the inability to stably control the outlet steam temperature of the reheaters. Therefore, there is an urgent need in the prior art for a technical solution to control the steam temperature at the outlet of the reheater after adding a reheater to coal-fired boilers below 50 MW. ...

AI Technical Summary

Problems solved by technology

[0002] At present, small coal-fired power plants below 50 MW generally use high-temperature and high-pressure units, and the boilers of small coal-fired power plants below 50 MW use ultra-high pressure primary reheating, because the flue gas volume per unit fuel of the boiler is much smaller than that of biomass power plants and Gas-fired power station brings huge difficulties to the arrangement of superheater and reheater and heat balance in the tail flue behind the furnace, which leads to the inability to stably control the outlet steam temperature of the reheater

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