Combined partial circulation biomass gasification furnace and working method thereof

Abstract

The invention discloses a combined partial circulation biomass gasification furnace and a working method thereof, belonging to the technical field of biomass energy gasification and utilization. The feeding section of a horizontal furnace body is respectively connected with a feeding system and a drying and gasifying section; the drying and gasifying section is embedded into the inner middle upperpart of a vertical furnace body and is separated from the vertical furnace body through an upper partition plate and a lower partition plate respectively; an outlet of the drying and gasifying section communicates with the middle part of the vertical furnace body; vent holes are formed in the upper partition plate and the lower partition plate; a crude gas outlet is formed in the upper portion ofthe vertical furnace body and connected with a dust removal device; the dust removal device is connected with a combustible gas outlet pipe, and a solid outlet of the dust removal device communicateswith the middle part of the vertical furnace body; an air inlet is formed in one side of the bottom of the vertical furnace body, and an ash outlet is formed in the other side of the bottom of the vertical furnace body; a gasified gas circulating device is arranged outside the vertical furnace body; and an upper end inlet of the gasified gas circulating device communicates with the middle part ofthe vertical furnace body, and a lower end inlet of the vertical furnace body communicates with the air inlet. According to the invention, gasification efficiency can be improved, and meanwhile, a tar content in generated combustible gas is greatly reduced.

Description

technical field [0001] The invention belongs to the technical field of gasification and utilization of biomass energy, and in particular relates to a combined partial circulation biomass gasification furnace and a working method thereof. Background technique [0002] With the rapid development of my country's economy, the demand for new clean energy continues to increase. Biomass energy, as a low-carbon emission and sustainable Difficulties and other disadvantages. Biomass gasification technology can convert low-grade biomass energy into high-quality gas fuel, which can replace fossil fuels such as natural gas and be used in residential gas, heating, gas power generation and other fields, so it has been widely used. However, tar is inevitably produced in the process of biomass gasification, which leads to the reduction of biomass gasification efficiency. At the same time, tar will also block and corrode pipelines. At this stage, there is a lack of effective tar treatment met...

AI Technical Summary

Problems solved by technology

However, tar is inevitably produced in the process of biomass gasification, which leads to the reduction of biomass gasification efficiency. At the same time, tar will also block and corrode pipelines. At this stage, there is a lack of effective tar treatment methods, which limits the better development of biomass gasification technology.

[0003] At the same time, the distribution of townships and rural areas in my country is relatively scattered, and the amount of straw and other wastes produced by farming is relatively large. Direct burning will cause serious environmental pollution problems. Therefore, a large amount of straw wastes are buried in the ground, and direct return to the field also brings The problem of increased pests and diseases, and too many fields and slow maturity will affect the germination and rooting of new crops

The patent with the authorized notification number CN210620724U discloses a biomass gasification furnace with a new structure. The gas recycling output port is set on the gas discharge pipe, but the purified biomass gasification gas is fed back, which does not play a role Significantly reduce the effect of tar content, and the long purification pipeline is easy to cause tar condensation blockage

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