CFB oxygen-enriched combustion smoke near zero emission power generation system

Abstract

The invention provides a CFB oxygen-enriched combustion smoke near zero emission power generation system which is composed of a boiler, a powder feeding system, an air separating device, a chimney, multiple stages of heat exchangers, multiple stages of dust removers, a recirculating fan, an induced draft fan, a dewatering device, an SO2 separating device, a CO2 catching device, an N2 separator, an NOx reaction device and the like. By changing the concentration of oxygen in secondary gas, it is ensured that coal of different types is stably combusted and burnt out, boiler efficiency is improved, and the adaptability of the boiler to loads and coal types is enhanced. Through all the devices, dust, vapor, SO2, NOx, CO2 and the like brought by coal powder combustion smoke are recycled, harmful gas, fine particles and trace elements in the smoke are integrally removed, the smoke exhaust temperature is lowered to be close to the atmosphere temperature, the near zero emission of the combustion smoke is achieved, the environment is protected, and the maximization of resource utilization is achieved.

Description

technical field [0001] The invention relates to a coal-fired boiler technology for a power station, in particular to a circulating fluidized bed (CFB) oxygen-enriched combustion near-zero-emission power generation technology. Background technique [0002] With the development of human industry, the environment and climate change issues have become the concerns of the whole world. The flue gas produced by the combustion of fossil fuels in the power station industry brings a large amount of dust, sulfide, nitrogen oxides and a large amount of carbon dioxide. The combustion products produced by the combustion of fossil fuels have a huge adverse impact on the environment and climate. However, the power station industry, which uses fossil fuels as raw materials, occupies an important position in the use of fossil fuels, and has also become a relatively concentrated source of carbon dioxide and other pollutant emissions, with huge emissions. Therefore, the control and treatment o...

AI Technical Summary

Problems solved by technology

However, these measures for the emission of fossil fuel combustion products are not well combined. They are all independently considered to remove them, and chemical raw materials such as sulfides and nitrogen oxides are not recycled, which increases operating costs and a waste of resources

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