IGCC power station coupling water electrolysis equipment system and operation method thereof

Abstract

The invention discloses an integrated gasification combined cycle (IGCC) power station coupling water electrolysis equipment system and an operation method. The system comprises IGCC power station conventional equipment, water electrolysis equipment, and a power supply line, an oxygen supply pipeline, a hydrogen supply pipeline, a hydrogen storage tank and an oxygen storage tank of the water electrolysis equipment. The power supply line of the water electrolysis equipment is connected with an electric energy output end of an IGCC power station and a power grid. The water electrolysis equipment electrolyzes water to prepare hydrogen and oxygen by utilizing electric power generated by the IGCC power station or electric power conveyed by the power grid. The oxygen supply pipeline of the water electrolysis equipment is connected with an oxygen supply pipeline of a coal gasifier, and oxygen generated by the water electrolysis equipment is used to partially replace oxygen prepared by an air separation device. The water electrolysis equipment can quickly change the power supply power and load characteristics at any time, so that the peak and frequency regulation load requirements of the power grid on the IGCC power station are met. Oxygen generated by the water electrolysis equipment is used for the coal gasifier, so that the oxygen cost of the gasifier is reduced, and the operation cost of the air separation system is also reduced.

Description

technical field [0001] The invention belongs to the field of IGCC power generation, and in particular relates to an IGCC power station coupled water electrolysis equipment system and an operating method thereof. Background technique [0002] The global climate issue has attracted more and more attention from people, and the "low-carbon economy" characterized by low energy consumption, low emission and low pollution has become a hot spot in the global political and economic game. my country's power supply is mainly based on coal power. In order to reduce soot-type pollution, vigorously developing coal-fired technology is a research direction that improves coal use efficiency, reduces pollution, and is economically feasible. IGCC power generation technology not only has the high efficiency of combined cycle, but also solves the environmental pollution problem caused by coal-fired power generation. [0003] IGCC is a clean coal power generation technology that organically inte...

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Problems solved by technology

[0007] Although this method uses the energy storage part of the air separation system to realize the enhancement of the peak-shaving capacity of the IGCC power station, due to the complex composition of the air separation system and the energy storage in the form of liquid oxygen, it is impossible to use the air separation system and liquid oxygen energy storage to achieve minute Level or even second-level power changes and load responses, therefore, it is impossible to meet the requirements of IGCC power plants to respond to grid frequency regulation

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