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Fixed bed biomass gasification process and equipment capable of collecting tar in steps

A biomass and fixed-bed technology, applied in fixed-bed gasification, petroleum industry, gas purification of condensed non-gaseous materials, etc., can solve the problems of waste of resources, difficult recycling of tar, secondary waste water pollution, etc., and improve the quality of gas. , the effect of alleviating the energy crisis and improving the environment

Inactive Publication Date: 2012-06-13
XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing biomass gasification devices adopt the traditional method of water washing and decoking. This method is not only difficult to recycle tar, but also produces secondary wastewater pollution.
Since tar has a certain economic value, disposal will also cause waste of resources

Method used

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  • Fixed bed biomass gasification process and equipment capable of collecting tar in steps
  • Fixed bed biomass gasification process and equipment capable of collecting tar in steps
  • Fixed bed biomass gasification process and equipment capable of collecting tar in steps

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] figure 1 Shown is the structural diagram of the downdraft fixed-bed gasification equipment. The equipment includes a cylindrical gasification furnace 1. The top inlet of the gasification furnace 1 is provided with a gasification air inlet pipe 21, and the bottom outlet is provided with a first air guide pipe 2. A high-temperature filter and dust collector 3 is connected through the first air guide pipe 2. The bottom of the high-temperature filter and dust collector 3 is provided with an ash discharge pipe 4. The upper part of the high-temperature filter and dust collector 3 is connected in series with three coke pools through the second air guide pipe 5. The three coke pools are respectively the first coke pool 9, the second coke pool 14 and the third coke pool 19. The first coke pool 9 is provided with a tar collector 6 and a first cooler 7 to control the temperature 600°C-250°C, the bottom of which is equipped with a first coke discharge tube 10; the second coke pool ...

Embodiment 2

[0016] figure 2 Shown is the structure diagram of updraft fixed bed gasification equipment. It is basically the same as the first embodiment, except that a gasification air inlet pipe 21 is arranged at the bottom inlet of the gasifier 1 , and a first gas guide pipe 2 is arranged at the top outlet of the gasifier 1 . The same parts are omitted.

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Abstract

The invention provides a fixed bed biomass gasification process and equipment capable of collecting tar in steps. According to the invention, a high temperature filter collector is arranged to be connected with a gasification furnace, a plurality of tar collectors are cascaded at a gas outlet of the high temperature filter collector, gasified wind current is blown into the top or the bottom of the gasification furnace through a gasified wind inlet, high temperature mixed gas containing tar in the gasification furnace is discharged, and under the condition that temperature is maintained, the high temperature mixed gas enters into the high temperature filter collector through a first gas-guide tube for high temperature dedusting and then enters into the cascaded tar collectors through a second gas-guide tube for segmental treatment so as to obtain tar containing different components. The tar in combustion gas is collected in steps through cooling according to different distillation sections of the components in the tar, and the tar is effectively utilized according to collected different components. According to the invention, stepped collection of tar is realized, harm of tar to environment is eliminated, obtained chemical raw materials are effectively utilized, and collected components with a high calorific value can be returned to the furnace for burning; the invention has important scientific significance to alleviation of energy crisis and improvement of environment.

Description

technical field [0001] The invention relates to a fixed-bed biomass gasification process and equipment, in particular to a fixed-bed biomass gasification process and equipment that uses surface heat exchange to collect tar grades. Background technique [0002] As far as biomass gasification is concerned, regardless of the fixed bed or fluidized bed gasification process, tar is inevitably contained in the gas due to the limitation of gasification temperature and reaction conditions during the reaction process. The components of tar are very complex, with as many as several hundred kinds, among which the hydroxyl derivatives of benzene are the most abundant, and the content of naphthalene is also relatively high. They are all very important organic chemical raw materials and are widely used in spices, plastics, dyes and medicines important intermediates in synthesis. Since there are 27 kinds of hydrocarbon oxygen-containing organic compounds, the existence of a large number o...

Claims

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Application Information

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IPC IPC(8): C10J3/20C10J3/06C10J3/62C10J3/84C10K1/04
Inventor 孙昌栋胡松年张红月
Owner XUZHOU KERONG ENVIRONMENTAL RESOURCES CO LTD
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