Dry deslagging continuous feeding biomass gasification furnace

Abstract

The invention discloses a dry deslagging continuous feeding biomass gasification furnace, and mainly relates to the technical field of energy science. The dry deslagging continuous feeding biomass gasification furnace comprises a furnace body, an air distribution disc is arranged in the furnace body, a slag storage chamber is arranged on the outer side of the bottom of the air distribution disc and fixedly connected with the furnace body, a plurality of slag discharging pipes are arranged at the bottom of the slag storage chamber, upper inserting plates used for sealing the slag discharging pipes are arranged on the upper portions of the slag discharging pipes, and lower inserting plates used for sealing the slag discharging pipes are arranged on the lower portions of the slag dischargingpipes. Wherein a blanking pipe is arranged at the top of the furnace body, a conical distributor is arranged on the lower side of the blanking pipe, a spiral sealing feeder is arranged at the top of the blanking pipe, and a buffer bin is arranged at the top of one end, far away from the blanking pipe, of the spiral sealing feeder; continuous sealed feeding in the gasification process can be achieved, a material layer in the furnace body can be prevented from being fluffy, local partial burning deviation and burning through can be effectively prevented, the gasification strength can be improved, water consumption can be reduced, the ash utilization range can be enlarged, and overheating burning loss of the air distribution disc can be prevented.

Description

technical field [0001] The invention relates to the field of energy science and technology, in particular to a dry slagging continuous feed biomass gasifier. Background technique [0002] At present, the carriers selected by domestic mainstream biomass gasification technologies are circulating fluidized bed gasifiers and updraft fixed bed gasifiers. Due to the low unit density and poor fluidity of biomass materials, the The material is fluffy, which leads to a series of problems in the existing biomass gasifier: [0003] 1) The existing circulating fluidized bed gasifier generally has the problems of low gasification intensity and low utilization rate of biomass gasification equipment, resulting in high operation difficulty and high maintenance cost. In addition, circulating fluidized bed gasification The ash content in the gas produced by the furnace is large, which will cause serious wear and tear on the components, which is not conducive to large-scale promotion and use;...

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Problems solved by technology

[0003] 1) The existing circulating fluidized bed gasifier generally has the problems of low gasification intensity and low utilization rate of biomass gasification equipment, resulting in high operation difficulty and high maintenance cost. In addition, circulating fluidized bed gasification The ash content in the gas produced by the furnace is large, which will cause serious wear and tear on the components, which is not conducive to large-scale promotion and use;

[0004] 2) The feeding system of the existing updraft fixed-bed gasifier has poor airtightness, large air leakage during feeding and air supply, and it is difficult to realize continuous feeding. The updraft fixed-bed gasifier is affected by its structure , when the material enters the furnace body, it is easy to cause uneven blanking, which makes shed material and slagging phenomenon occur during the biomass gasification process. Continuous and stable operation, it is difficult to meet the heat load demand of users, which is not conducive to the popularization and application of biomass gasification technology

[0005] 3) The existing updraft fixed-bed gasifier adopts the integrated structure design of the slag discharge drive mechanism and the wind distribution disk drive mechanism, and its slag discharge speed and wind distribution disk rotation speed cannot be flexibly controlled independently, resulting in the contact between the gasification agent and the material Inhomogeneous and insufficient local reaction can easily cause material bridging and partial burning in the device, which will reduce the gasification intensity and reduce the quality of the generated combustible gas;

[0006] 4) The existing updraft fixed-bed gasifier is affected by its structure, and the surrounding materials are not easy to react completely, resulting in a decrease in the biomass gasification rate and an increase in energy consumption;

[0007] 5) Most of the existing updraft fixed-bed gasifiers use water-sealed wet-type slag discharge, which consumes a lot of water and makes it difficult to realize high-value utilization of ash and slag

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