A combined partial circulation biomass gasifier and its working method

Abstract

The invention discloses a combined partial circulation biomass gasification furnace and its working method, belonging to the technical field of biomass energy gasification utilization. The feeding section of the horizontal furnace body is respectively connected with the feeding system and the drying-gasification section; the drying-gasification section is embedded in the middle and upper part of the vertical furnace body and separated from the vertical furnace body by the upper partition and the lower partition respectively , the outlet of the drying-gasification section communicates with the middle of the vertical furnace body; the upper partition and the lower partition are provided with ventilation holes; the upper part of the vertical furnace body is provided with a crude gas outlet, which is connected to the dust removal device The combustible gas outlet pipe is connected, and the solid outlet of the dust removal device is connected to the middle of the vertical furnace body; one side of the bottom of the vertical furnace body is provided with an air inlet, and the other side is provided with an ash outlet; the gasification gas circulation device is installed in the vertical Outside the straight furnace body, the upper inlet of the gasification gas circulation device communicates with the middle of the vertical furnace body, and the lower inlet communicates with the air inlet. The gasification efficiency can be improved, and the tar content in the generated combustible gas can be 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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