Combined cycle thermodynamic system based on coupling of light gas turbine and biomass direct-fired fire grate type boiler

Abstract

The invention provides a combined cycle thermodynamic system based on coupling of a light gas turbine and a biomass direct-fired fire grate type boiler. The NOX emission of the light gas turbine and the biomass direct-fired fire grate type boiler is reduced; the highest combustion temperature in the biomass direct-fired fire grate type boiler is lower than 950 DEG C, so that the slagging problem is fundamentally solved; heat and oxygen in exhaust smoke of the light gas turbine are reasonably used, the input heat of the boiler is greatly increased, and the power generation efficiency of the system is obviously improved; and the power generation capacity of renewable energy sources is improved, and the consumption of fossil energy sources and the carbon emission are reduced accordingly. Thesystem achieves the effects of high efficiency, energy conservation and emission reduction, accords with the industrial policy of developing low-carbon economy in China at present, and is beneficial to realizing a peak carbon dioxide emissions target and a carbon neutral desire in China.

Description

technical field [0001] The invention belongs to the technical field of comprehensive utilization of natural gas and biomass fuels, and in particular relates to a thermal system coupled with a light gas turbine and a biomass direct-fired grate boiler. Background technique [0002] Natural gas is a relatively clean fossil energy and is usually used as a driving fuel for gas turbines or internal combustion engines. Biomass is the renewable energy with the largest reserves, the widest range and the most stable energy type in nature. In the context of the current increasingly stringent carbon dioxide emissions, biomass fuels will become an important part of my country's energy structure reform due to its "carbon neutral" characteristics. There are many technical routes for biomass utilization, including direct combustion, solid-state gasification, co-combustion with fossil energy, fermentation to produce biogas, briquetting to make fuel, etc. Among them, the cost of direct combu...

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Problems solved by technology

[0032] In view of the above problems, the purpose of the present invention is to solve the problem of high combustion temperature, low ash melting point, thermal NO X To solve the problem of high generation, reduce the plant power load of the biomass boiler system, optimize the steam water system, reduce the heat consumption of power generation, improve the power generation efficiency and power of the unit, and then promote the consumption of biomass energy and increase the "green power" The proportion in my country's power supply system

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