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Biomass gasification system

A gasification system and biomass technology, applied in the field of biomass gasification systems, can solve the problems of high tar content in the gaseous gas, unfavorable equipment selection, and high gas temperature, and achieve the improvement of carbon conversion rate, volumetric gas production rate, The effect of high volume vaporization rate

Active Publication Date: 2014-03-26
GUANGZHOU XINGUANGHE ENVIRONMENTAL PROTECTION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The disadvantage of the above-mentioned technical solution is that there are two serious problems in the actual production of the updraft fixed-bed gasifier. One is that the gas tar content of the produced material is high and the temperature is low, which leads to a large amount of tar precipitation in the gas pipeline. Then block the pipeline, another problem is that the grate is easy to burn
The downdraft gasifier also has two serious disadvantages. One is that the gas temperature is higher and the calorific value is lower, which is not conducive to the selection of subsequent equipment. The other problem is that the grate is burned

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0044] like Figure 1-Figure 2 As shown, the biomass gasification system of this embodiment includes a multi-stage fixed-bed biomass gasifier 1 , a dust removal device (such as a single-cylinder cyclone dust removal device 2 ), a diffuser 3 , and a wet slag discharge device 4 .

[0045] Among them, the multi-stage fixed-bed biomass gasification furnace 1 includes a feeding device 111 (such as a screw conveyor), a blanking pipeline 11, and a furnace body. The furnace body is built with refractory and thermal insulation materials, including the first gas production section 12, the second gas production section 13, and the tail ash section 14. The top of the first gas production section 12 is provided with a fuel inlet.

[0046] The tail ash section 14 is cone-shaped and located at the bottom of the furnace body. The bottom of the tail ash section 14 is provided with a slag outlet 142 , and the side of the tail ash section 14 is provided with an air inlet 145 and a return inlet...

Embodiment 2

[0053] The differences between this embodiment and Embodiment 1 are: (1) It also includes a third gas production section, which is located between the first gas production section and the second gas production section; (2) the first gas production section The gas production section, the second gas production section and the third gas production section are all in the shape of a square tube; (3) There are four gas outlets in each gas production section, and in each gas production section, the gas outlets are at the same height Evenly arranged, the angle between adjacent gas outlets is 90°; (4) There is a gas collecting pipe in each gas production section, and the gas collecting pipe includes a vertically arranged main pipe and four branch pipes connected to the main pipe, four The branch pipes are respectively inserted into the four gas outlets correspondingly.

Embodiment 3

[0055] like image 3 As shown, the difference between this embodiment and Embodiment 1 is that the feeding device is a two-stage feeding device 7 , which includes a first-stage feeding device 701 , an intermediate material box 702 , and a final-stage feeding device 703 . The primary feeding device 701 is a speed-adjustable cantilever screw conveying device. It includes an inlet at the upper front and an outlet at the end. The feeding port of the silo is connected to the feeding port above the front part of the primary feeding device 701 . The discharge opening at the end of the primary feeding device 701 is an upward slant, and a gland 704 is provided on the slant. The angle formed by the plane where the bevel is located and the axis of the cantilever screw conveying device is 45°. The gland 704 has an automatic reset mechanism (such as a spring 705). In addition, a section of blades before the outlet of the primary feeding device 701 is removed. The outlet of the primary...

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Abstract

The invention provides a biomass gasification system. The biomass gasification system comprises a multi-section fixed bed biomass gasification furnace, wherein the multi-section fixed bed biomass gasification furnace comprises a furnace body which is arranged in the longitudinal direction, the furnace body comprises a conical-hopper tail ash section which is arranged on the bottom and at least two gas production sections which are arranged on the tail ash section, the two gas production sections are arranged in the longitudinal direction and connected with each other in an end-to-end manner, and a fire grate is arranged between the tail ash section and the gas production section on the bottom; the side part of each gas production section is provided with a gas outlet; each gas outlet is connected with a gas branch pipeline, and a plurality of gas branch pipelines are connected to a gas main pipeline; the bottom of the tail ash section is provided with a slag outlet, and the side part of the tail ash section is provided with an air inlet; the upper side surface or the top end of the gas production section on the top is provided with a fuel inlet. The gasification furnace is compact in structure; the biomass raw material moisture applicability is high, and the strict requirement of the conventional gasification furnace on the moisture can be broken through; the produced gas is controllable in nature, and the appropriate biomass gas can be adjusted according to different requirements of the user; the biomass gasification system is applicable to the multi-section gas production process, so that the gasification efficiency is higher than that of the conventional gasification furnace.

Description

technical field [0001] The invention relates to a biomass gasification system. Background technique [0002] Biomass is a very important renewable energy, which has the characteristics of renewability, low pollution and wide distribution. The use of biomass as an alternative energy source is of great significance to low-carbon emission reduction, reduction of "greenhouse effect" and improvement of atmospheric acid rain environment. Biomass gasification system is to use biomass to burn in a closed anoxic furnace in a gasifier, and produce combustible gas after dry distillation, pyrolysis and thermochemical oxidation. Fixed bed biomass gasifier is a commonly used biomass gasifier. Currently used fixed-bed biomass gasifiers mainly include updraft gasifiers and downdraft gasifiers. [0003] For example, Chinese patent application 200810010318 discloses an updraft straw gasifier, which includes a furnace body and a water chamber with a water inlet; The upper chamber and the l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/20C10J3/30C10J3/72
Inventor 赵广健
Owner GUANGZHOU XINGUANGHE ENVIRONMENTAL PROTECTION TECH
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