Multi-medium dry biomass direct coupling power generation system and method

Abstract

The invention discloses a multi-medium dry biomass direct coupling power generation system and method. The multi-medium dry biomass direct coupling power generation system comprises a biomass storage bin, a biomass crusher, a biomass distributor, a unit steam pipeline, a unit hot primary air pipeline, a boiler tail high-temperature flue and a boiler tail low-temperature flue; a bottom outlet of the biomass storage bin communicates with an inlet of the biomass crusher, and an outlet of the biomass crusher communicates with a combustor on a boiler; the unit steam pipeline communicates with the inlet of the biomass crusher; the unit hot primary air pipeline communicates with the inlet of the biomass crusher; an extraction opening of the high-temperature flue at the tail part of the boiler is communicated with an inlet of the biomass crusher; and an extraction opening of the boiler tail high-temperature flue communicates with the inlet of the biomass crusher. According to the multi-medium dry biomass direct coupling power generation system and method, direct coupling power generation of dried biomass and a conventional coal-fired power generation system can be realized.

Description

technical field [0001] The invention belongs to the field of biomass coupling power generation utilization, and relates to a multi-media drying biomass direct coupling power generation system and method. Background technique [0002] As a renewable zero-carbon emission fuel, biomass has unique advantages in carbon emission reduction. However, for a long time, due to factors such as low calorific value, scattered distribution, difficulty in collection and seasonality of biomass, my country's biomass utilization is still dominated by direct return of straw to the field, composting, and direct combustion of small units, and the technical level is relatively low. my country has the world's largest ultra-low-emission coal-fired unit, and is facing enormous pressure to reduce carbon emissions in today's energy transition. Direct combustion, as the lowest-cost biomass-coupled power generation method, has attracted widespread attention. There have been successful cases of directly ...

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Problems solved by technology

There have been successful cases of directly coupling power generation with a large proportion of wood-molded pellets in Europe, but due to the characteristics of high moisture, high volatile matter, and high alkali metal content of straw-based biomass, so far no direct coupling of unformed biomass with straw-based biomass has been seen. Successful cases of coupled power generation, that is, direct coupling power generation of dried biomass and conventional coal-fired power generation systems cannot be achieved

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