Power generation system and method by mixing fuel gas generated in molded biomass fuel burning with pulverized coal

Abstract

The invention discloses a power generation system and method by mixing fuel gas generated by molded biomass fuel burning with pulverized coal. Burning molded biomass fuel for a circulating fluidized bed is adopted, biomass energy is converted into high-temperature biomass gas, after high-temperature dust removal and heat exchange and cooling, the biomass gas is sent into a gas burner arranged on a pulverized coal boiler through a booster fan and has mixed combustion with the high-temperature pulverized coal in the boiler through the gas burner, so as to improve the utilization efficiency of the biomass energy and utilize an efficient coal-fired power generation unit to conduct combined power generation by the biomass and the fire coal. According to the system, a biomass gas energy on-line measuring device is arranged, so as to realize real-time effective online biomass gas heat energy detection. According to the power generation system and method, the problems that a biomass power plant is difficult in storage, large in land occupation and low in burning power generation efficiency are better solved, the system takes full use of the existing coal-fired power generation unit device to efficiently conduct power generation by molded biomass fuel, meanwhile the fire coal consumption of the existing coal-fired power generation unit is also reduced, and the low-load stable burning property, the low-load capacity and the low-load boiler efficiency of the existing coal-fired unit are improved.

Description

【Technical Field】 [0001] The present invention belongs to the technical field of biomass energy utilization, and more specifically relates to a power generation system and method in which fuel gas produced by the combustion of shaped biomass fuel in a circulating fluidized bed is sent to a coal-fired boiler for joint power generation. 【Background technique】 [0002] Biomass energy is a renewable carbon source and one of the energy sources advocated by the country. However, the currently widely used biomass direct combustion power generation technology has many defects. Its power generation system has a complex structure, huge floor space, high investment quota, many production and operation personnel, high operation and maintenance costs, low comprehensive energy efficiency, high fuel consumption, and power generation hours are restricted by seasonal fuel supply and other issues, causing a large part of the production. It is difficult for material direct-fired power plants to su...

AI Technical Summary

Problems solved by technology

Its power generation system has a complex structure, a huge floor area, high investment, a large number of production and operation personnel, high operation and maintenance costs, low comprehensive energy efficiency and high fuel consumption, and the power generation hours are limited by fuel seasonal supply. It is difficult for material direct combustion power plants to survive

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