Supercritical reheating type double-back-pressure-turbine double-steam-extraction industrial heat supply system

Abstract

The invention discloses a supercritical reheating type double-back-pressure-turbine double-steam-extraction industrial heat supply system which comprises a condenser, a condensate pump, a shaft seal heater, a low-pressure deaerator, a relay water pump, a low-pressure heater, a high-pressure deaerator, a water feeding pump steam turbine set, a high-pressure heater, a boiler, an ultrahigh-pressure back-pressure steam turbine generator set and a medium-pressure back-pressure steam turbine generator set. The ultrahigh-pressure back-pressure steam turbine generator set and the medium-pressure back-pressure steam turbine generator set are respectively designed as ultrahigh-pressure parameters according to industrial heat supply pressure, and an ultrahigh-pressure parameter heat supply pipeline is arranged between a reheating hot section of a boiler and a medium-pressure steam inlet main regulating valve to supply heat to the outside. The low-pressure parameter heat supply adopts an interstage extraction steam source of a medium-pressure back-pressure turbine generator set; when the medium-pressure and back-pressure steam turbine generator set stops running or cannot meet low-pressure heat supply, heat is adopted for low-pressure parameter heat supply and then subjected to temperature and pressure reduction to provide a standby steam source, and double-extraction heat supply is achieved. And ultrahigh-pressure parameter industrial heat supply and low-parameter heat supply are effectively realized.

Description

technical field [0001] The invention relates to the technical field of heat and power cogeneration equipment, in particular to an ultra-high voltage industrial heating system. Background technique [0002] Combined heat and power generation has comprehensive benefits such as high comprehensive utilization efficiency of energy, energy conservation and environmental protection, improvement of the environment, improvement of heating quality, and increase of power supply. The construction of thermal power plants is one of the effective means for cities to improve the quality of the atmospheric environment, and it is a public welfare infrastructure that improves people's quality of life. Since the reform and opening up, my country's cogeneration of heat and power has developed rapidly, which has played an important role in promoting national economic and social development. Industrial parks dominated by industrial heat loads should concentrate on planning and construction of heat...

AI Technical Summary

Problems solved by technology

For industrial steam with ultra-high pressure parameters, the current combined heat and power units cannot meet the heating demand. At present, industrial heating with ultra-high pressure parameters generally uses small boilers for direct heating, which is economical and environmentally friendly. Meet the project's electricity load demand

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