Down-draught type biomass gasifier for secondarily cracking tar

A secondary cracking and gasifier technology, which is applied in the petroleum industry and the manufacture of combustible gas, etc., can solve the problems of affecting the stable operation of the gasifier, high tar content, blockage of pipes, etc., and achieve good gasification effect and reduce smoke and dust content. , the effect of the high position of the gas outlet

Active Publication Date: 2010-08-25
湖南哈工机器人研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a downdraft tar secondary cracking biomass gasifier to solve the problem that the downdraft gasifier has a hi

Method used

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  • Down-draught type biomass gasifier for secondarily cracking tar
  • Down-draught type biomass gasifier for secondarily cracking tar
  • Down-draught type biomass gasifier for secondarily cracking tar

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specific Embodiment approach 1

[0007] Specific implementation mode one: combine figure 1 and Figure 4-Figure 6 Explain that the downdraft tar secondary cracking biomass gasification furnace in this embodiment includes ash cleaning door 1, movable grate assembly 2, multiple intake pipes 6, plugging 7, gas outlet pipe 8, inner furnace cylinder, outer Furnace tube 10, furnace cover 11, refractory layer 14 and insulation layer 15; the inner furnace tube is arranged in the outer furnace tube 10, the lower end of the outer furnace tube 10 is closed, the outer furnace tube 10 is a cylindrical tube, and the inner cavity of the inner furnace tube is The furnace, the inner furnace tube is composed of an upper cylindrical tube 9, an upper truncated tube 25, a lower truncated tube 30 and a lower cylindrical tube 21 from top to bottom, and the small diameter of the upper truncated tube 25 and the lower truncated tube 30 The end faces are butted to form a furnace necking 22, the lower end face of the upper cylindrical ...

specific Embodiment approach 2

[0008] Specific implementation mode two: combination figure 1 with Image 6 Description, the movable grate assembly of the present embodiment is made up of movable grate 2, grate rocker 3, sealing ring 18 and grate rocker shaft 24; The side wall of side wall, insulation layer 15, refractory layer 14 and inner furnace cylinder is fixedly connected with movable fire grate 2, and the other end of fire grate rocker shaft 24 is fixed with an end of fire grate rocker 3 that is arranged on the outside of outer furnace cylinder 10. Then, the grate rocker shaft 24 is vertically arranged with the grate rocker 3 , and the sealing ring 18 is mounted on the grate rocker shaft 24 and leans against the outer wall of the outer furnace tube 10 . In this way, the grate rocker shaft 24 is sealed with the outer furnace cylinder through the sealing ring 18; the grate is moved by rotating the grate rocker 3, and then the purpose of removing ash on the grate is realized. Others are the same as the...

specific Embodiment approach 3

[0009] Specific implementation mode three: combination figure 1 Note, the difference between this embodiment and specific embodiment 1 or 2 is that: the gasifier in this embodiment also includes an annular water tank 13; 13, the cross section of furnace cover 11 is circular. With such setting, the furnace cover can be water-sealed and has a good sealing effect. Moreover, the circular furnace cover can also condense and collect the water vapor evaporated by the biomass into the sealed annular water tank, so there is no high requirement for the moisture content of the biomass.

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Abstract

The invention relates to a down-draught type biomass gasifier for secondarily cracking tar and aims at the problems that tar in the down-draught type biomass gasifier has high content and blocks a pipeline after being combined with water, ash, carbon and the like so as to influence the stable running of the gasifier. The lower end of an inner gasifier tube is arranged in an ash bin; a movable gassifier gate is arranged below the inside of a reduction chamber; a fuel gas secondary cracking chamber is arranged between a flame-retardant coating and the inner gasifier tube; a fuel gas secondary cracking chamber inlet is arranged between the outer wall at the lower end of the inner gasifier tube and the inner wall of the flame-retardant coating; one end of an air inlet pipe passes through the side wall of an outer gasifier tube which is arranged above a hearth necking, a heat-insulating layer, a flame-retardant coating and a fuel gas secondary cracking chamber and the side wall of the inner gasifier tube as well as is communicated with a hearth; the other end of the air inlet pipe is in threaded connection with a plug; the side wall of the plug is provided with a plurality of air inlet holes; and an air exhaust pipe passes through the side wall of the outer gasifier tube, the heat-insulating layer and the flame-retardant coating and is communicated with the fuel gas secondary cracking chamber. The invention can realize that tar in the fuel gas is secondarily cracked in a high-temperature area, greatly reduce the content of the tar in combustible gas and meet the requirement of rural residents on gas application.

Description

technical field [0001] The invention relates to a downdraft biomass gasifier, which belongs to the technical field of biomass energy utilization. Background technique [0002] Biomass gasification technology uses a gasification device to perform high-temperature pyrolysis of biomass in an anoxic state to produce combustible gas, which can be used for household cooking and industrial power generation after cooling and purification. At present, gasifiers are divided into two types: fixed bed and fluidized bed, and the most common type in the prior art is fixed bed gasifier. The fixed bed gasifier has the advantages of simple structure, low cost, easy operation and wide fuel range. Fixed bed gasifiers mainly have two structural forms: updraft type and downdraft type. No matter what kind of gasifier is used, there is a problem of high tar content, which will block the pipeline after being combined with water, ash, charcoal, etc., affect the stable operation of the gasifier, an...

Claims

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Application Information

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IPC IPC(8): C10J3/20C10J3/64C10J3/84C10J3/34C10J3/72
Inventor 别如山王庆功刘学忠董凯
Owner 湖南哈工机器人研究院有限公司
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