Steam reinjection gas turbine power generation method and device based on solar energy and waste heat recovery

Abstract

The invention relates to a steam reinjection type gas turbine power generation method and device based on solar energy and waste heat recovery. Purified air enters a gas compressor to be pressurized, the compressed air enters a heat regenerator or enters the heat regenerator after being mixed with saturated steam, the heat regenerator heats the work medium gas through tail gas of a gas turbine, and part of waste heat is recovered. The work medium gas heated by the heat regenerator enters a combustion chamber to be combusted together with fuel after being heated by a solar heat collector, generated high-temperature flue gas enters the gas turbine to do work, tail gas sequentially enters the heat regenerator and a steam generator, the tail gas waste heat is recovered by the steam generator again, the saturated steam for reinjection is generated, and steam in the tail gas is recovered after being condensed. When solar radiation does not exist or radiation is not sufficient, the work medium gas directly enters the combustion chamber through a bypass. The saturated steam is re-injected into a gas turbine system, the power consumption of the gas compressor is reduced, and the power generation efficiency and the specific power of the gas turbine are improved; and meanwhile, solar energy is utilized to heat the work medium gas, and the consumption of the fuel is reduced.

Description

technical field [0001] The content of the patent relates to the field of gas turbine technology, especially the steam reinjection gas turbine power generation method and device based on solar energy and waste heat recovery. Background technique [0002] The development and utilization of solar energy, a clean and non-polluting renewable energy source, is of great significance for alleviating the current pressure on fossil energy and environmental pollution. Solar thermal power generation technology is to convert solar thermal energy into electrical energy. There are mainly four utilization methods: dish type, tower type, trough type, and Fresnel type. Among them, for distributed power generation, the dish type solar heat collection system has good light concentrating performance. , The system structure is simple, the distribution is flexible, the site adaptability is good, and it has a broader prospect. However, the efficiency of solar direct thermal power generation is gen...

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Problems solved by technology

[0005] The invention proposes a steam reinjection gas turbine power generation method and device based on solar energy and waste heat recovery, which solves the problem of low efficiency of solar thermal power generation alone, improves the power generation efficiency of gas turbines, and can realize comprehensive utilization of multiple energy sources at the same time

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