Integrated heat storage industrial steam supply combined heat and power generation peak regulation and frequency modulation system and operation method

Abstract

The invention discloses an integrated heat storage industrial steam supply combined heat and power generation peak regulation and frequency modulation system and an operation method. The system is composed of a coal-fired power generation system, a steam supply system and a fused salt heat storage system. The coal-fired power generation system comprises a boiler, a steam turbine, a condenser, a condensate pump, a high-low pressure heater, a deaerator and a water feeding pump; and the steam supply system comprises a reheater cold section steam extraction adjusting valve, a reheater hot section steam extraction adjusting valve, an industrial steam supply header, a steam generator, a water tank water feeding pump and a steam supply water supplementing tank. The fused salt heat storage system comprises a heating selection valve, a fused salt heat heater, a fused salt electric heater, a fused salt adjusting valve, a high-low-temperature fused salt tank and a high-low-temperature fused salt pump. Heat supply steam comprises reheater cold section extraction steam, reheater hot section extraction steam and steam generated in the steam generator, and the three are matched with one another to meet the requirement of a steam heat supply network. By adjusting the opening degrees of the reheater cold section steam extraction adjusting valve and the reheater hot section steam extraction adjusting valve and the rotating speed of the water tank water feeding pump, the fused salt heat storage assists a coal-fired power generation system to rapidly increase and decrease the load, and the unit operation flexibility is improved.

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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