Integrated heat storage industrial steam supply cogeneration peak regulation and frequency regulation system and operation method

Abstract

The invention discloses an industrial steam supply cogeneration peak regulation and frequency modulation system with integrated heat storage and an operation method. The system is composed of a coal-fired power generation system, a steam supply system, and a molten salt heat storage system. The coal-fired power generation system includes a boiler, Steam turbine, condenser, condensate pump, high and low pressure heater, deaerator, feed water pump, steam supply system including reheater cold section and hot section extraction regulating valve, industrial steam supply header, steam generator, water tank supply Water pump, steam supply and water tank, molten salt thermal storage system includes heating selection valve, molten salt thermal heater, molten salt electric heater, molten salt regulating valve, high and low temperature molten salt tank, high and low temperature molten salt pump. The steam for heating includes steam extracted from the cold and hot sections of the reheater and the steam generated in the steam generator. The three cooperate with each other to meet the needs of the steam heating network. By adjusting the opening of the steam extraction control valve in the cold and hot sections of the reheater and the speed of the feedwater pump in the water tank, the molten salt heat storage is used to assist the coal-fired power generation system to quickly reduce the load and improve the operating flexibility of the unit.

Description

technical field [0001] The invention belongs to the field of cogeneration of heat and power, and in particular relates to an operation method of an industrial steam supply cogeneration peak regulation and frequency regulation system with integrated heat storage. The system uses a steam supply system and a molten salt heat storage system to cooperate with each other to provide steam that meets the needs of industrial steam supply. By adjusting the speed of the valve group of the steam supply system and the water tank feed pump, the industrial steam supply can be used to assist the coal-fired power generation system to quickly increase and decrease the load, and the flexibility of the system's peak regulation and frequency regulation is enhanced. Background technique [0002] Intermittent renewable energy such as wind energy and solar energy will have a surplus when generating electricity, and integrating them into the grid will cause a huge impact on the grid. The contradict...

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Problems solved by technology

The disadvantage is that due to the limitation of the site, the noise of the air compressor is large, and the working efficiency of the system is not high if there is an air leakage

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