Differential rotating bed continuous feeding biomass gasification furnace

Abstract

The invention discloses a differential rotating bed continuous feeding biomass gasification furnace, and mainly relates to the technical field of energy science. The furnace comprises a furnace body,an air distribution disc and an air disc driving device for driving the air distribution disc to rotate are arranged in the furnace body, the furnace body comprises a cylinder body and a cylinder bodysupport located on the outer side of the cylinder body and used for supporting the cylinder body, an ash bin is arranged on the lower side of the cylinder body, and an ash bin driving device for driving the ash bin to rotate is arranged on the cylinder body support. 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, a buffer bin is arranged at the top of the end, away from the blanking pipe, of the spiral sealing feeder, and a feeding barrel with the closed bottom end is obliquely arranged on one side of the buffer bin. The biomass gasification furnace can realize continuous sealed feeding in the gasification process, can effectively prevent partial burning deviation and burning through, is easy to control the thickness of an ash layer, can enhance the disturbance of biomass in the furnace, and improves the gasification strength.

Description

technical field [0001] The invention relates to the field of energy science and technology, in particular to a differential rotary bed continuous feed biomass gasifier. Background technique [0002] Biomass gasification technology is a rapid and reliable biomass energy utilization technology developed in recent years. It is an efficient way of biomass energy conversion. At present, the carrier selected by domestic mainstream biomass gasification technology is circulating flow Bed gasifier and updraft fixed bed gasifier, but there are a series of problems in use: [0003] 1) The common problems of circulating fluidized bed gasifiers are low gasification intensity and low utilization rate of biomass gasification equipment, which lead to high operation difficulty and high maintenance cost. The ash content in the produced gas is large, which will cause serious wear and tear on the components, which is not conducive to the large-scale promotion and use of equipment; [0004] 2)...

AI Technical Summary

Problems solved by technology

[0003] 1) The common problems of circulating fluidized bed gasifiers are that the gasification intensity is low and the utilization rate of biomass gasification equipment is not high, which leads to high operation difficulty and maintenance cost. The ash content in the produced gas is large, which will cause serious wear and tear on the components, which is not conducive to the large-scale promotion and use of equipment;

[0004] 2) The feed system of the updraft fixed-bed gasifier has poor airtightness, large air leakage during feeding and air supply, and it is difficult to realize continuous feeding

Due to the low unit density and poor fluidity of the biomass material, the material in the biomass gasification device is fluffy, and it is easy to cause uneven blanking when the material enters the furnace body, resulting in shed material and slagging during the biomass gasification process. Uneven reaction in the furnace will cause the gasification furnace to burn partially and burn through, resulting in that the gasification process cannot be carried out continuously and smoothly, and 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 poor contact between the gasification agent and the material. Insufficient uniform and partial reaction can easily cause bridging and partial burning of materials in the device, reducing the gasification intensity and reducing 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

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