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Internal circulation external heating type gasification device

A gasification device, external heating technology, applied in the field of internal circulation and external heating gasification devices, can solve the problems of incomplete and continuous movement of gasification raw materials, low conversion efficiency of residual carbon, and short residence time, etc., to achieve improved Heat and mass transfer efficiency and gasification rate, heat loss is small, and the effect of improving gasification efficiency

Active Publication Date: 2011-11-30
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (1) The movement of the gasification raw material in and out of the gasifier by its own weight cannot be completely continuous and stable
[0008] (2) The residence time of gasification raw materials in the furnace is short, and the conversion efficiency of residual carbon is low, which ultimately leads to low gasification efficiency

Method used

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  • Internal circulation external heating type gasification device
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Examples

Experimental program
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Effect test

example 1

[0030] The experimental raw material is pine sawdust from a furniture factory, which is processed into a powder with a particle size of less than 250 μm by a self-made crusher, and then cracked in the gasification device.

[0031] After the raw material is cracked, the total gas production is 1.53Nm 3 / kg. The gaseous products mainly include H 2 , CO, CH 4 、C 2 h 4 、C 2 h 6 and CO 2 etc., the respective contents are 42.8%, 22.5%, 5.7%, 0.8%, 0.06% and 27.2%, the residual oxygen content is 0.3%, and the carbon conversion rate reaches 93.59%.

example 2

[0033] The experimental raw material is urban waste from a certain place, and its main components include kitchen waste, paper, fabric, bamboo wood and plastic. The raw material is processed into particles with a particle size of less than 15mm by a self-made crusher, and the cracking reaction is carried out in the gasification device, and the moisture content of the crushed garbage is 29.5%.

[0034] After the raw material is cracked, the total gas production is 1.12Nm 3 / kg. The gaseous products mainly include H 2 , CO, CH 4 、C 2 h 4 、C 2 h 6 and CO 2 , etc., the respective contents are 44.3%, 21.5%, 5.6%, 0.6%, 0.1% and 26.9%, and the residual oxygen content is 0.3%. Due to the increased residence time, the conversion of carbon reached 90.3%.

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Abstract

The invention discloses an internal circulation external heating type gasification device. The device comprises a central gasification chamber, an annular heating chamber, a peripheral gasification chamber, a residual carbon reflux chamber and the like. Biomass micron fuel enters the annular heating chamber and is efficiently burned, so that the required heat is provided for the central gasification chamber, the peripheral gasification chamber and the residual carbon reflux chamber. Cracking and gasification raw materials absorb the heat in the down-up movement process of the central gasification chamber to be cracked and gasified, and an initial cracking product then enters the peripheral gasification chamber and is further gasified; and residual carbon refluxes through the residual carbon reflux chamber and enters the central gasification chamber to carry out a water gas reaction with water vapor, so that medium-calorific-value gas of which the content of CO and the content of H2 are equal and CO and H2 account for about 80 percent of the total amount is obtained. In the device, an internal circulation external heating mode is used for gasification; and the device has the advantages of high heat utilization rate, heat transfer efficiency and gasification efficiency and the like, and the calorific value of gas is high. The internal circulation external heating type gasification device can be widely applied to the preparation of the gas by cracking and gasifying municipal organic refuse, agricultural and forest residues and the like.

Description

technical field [0001] The invention belongs to biomass resource technology, and in particular relates to an internal circulation and external heating type gasification device, which is suitable for cracking and gasifying solid fuels such as biomass and coal to produce fuel gas. Background technique [0002] With the depletion of fossil energy and the seriousness of environmental problems, the development of clean and renewable energy has become an urgent issue. Biomass has the characteristics of renewability, storage, low pollution, and wide distribution, and its efficient conversion and clean utilization have increasingly attracted worldwide attention. [0003] Biomass refers to all organic substances formed by photosynthesis of green plants directly or indirectly, and is a very important renewable resource. However, compared with fossil energy, the energy quality of biomass is low, which cannot meet the applicability and economy of industry. Therefore, in order to make b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/60C10J3/66C10J3/84C10J3/72C10J3/48
Inventor 肖波胡智泉章北平陈朱蕾刘石明冯宇焦李胡沔
Owner HUAZHONG UNIV OF SCI & TECH
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