Biocarbon/steam co-production device and technology through biomass pyrolysis, gasification, and combustion sectional conversion

Abstract

The invention discloses a biocarbon / steam co-production device and technology through biomass pyrolysis, gasification, and combustion sectional conversion. The co-production device comprises a fluidized-bed pyrolysis and gasification furnace, a low thermal value gas combustion chamber, a primary separation device, a secondary cyclone separator, an air preheater, a steam generator, and a flue gas processing facility. The technology comprises the following steps: making biomass raw materials carry out pyrolysis and gasification reactions in the fluidized-bed pyrolysis and gasification furnace so as to generate biocarbon and high-temperature low thermal value fuel gas, separating the biocarbon and fuel gas by the two grade separation devices to obtain high quality biocarbon, transferring the separated high temperature fuel gas into the low thermal value gas combustion chamber, burning, and transferring the high temperature flue gas generated by the combustion into the steam generator to generate steam. The provided technology is advanced, the production equipment is simple and reliable, the production cost can be effectively reduced, and the production benefit is improved.

Description

technical field [0001] The invention belongs to the technical field of biomass utilization, and in particular relates to a biomass pyrolysis gasification combustion staged transformation biochar / steam cogeneration device and process. Background technique [0002] With the increasingly prominent global energy and environmental issues, the development of new energy sources has become an urgent task. Biomass energy is rich in resources, can be converted into clean fuel, is the only renewable energy that can be stored and transported, and is also the only renewable carbon source. It will play an important role in meeting future social energy needs and promoting sustainable social development. important role. There are many specific types of biomass, mainly referring to wood, crops (straw, rice straw, wheat straw, bean stalk, cotton stalk, chaff, etc.), weeds, algae, etc. my country's biomass energy is also extremely rich, and the biomass resources that can be developed into en...

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Problems solved by technology

However, the biomass in my country is mainly straw, and many links such as collection and transportation are relatively extensive, resulting in the characteristics of high alkalinity, high moisture and low calorific value of the available biomass. The pyrolysis gasification process leads to the low calorific value of the gas, which cannot be utilized by conventional combustion methods, which greatly limits the range of raw materials for biomass pyrolysis gasification polygeneration technology

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