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Downer-fixed bed pyrolysis-gasification integrated method and device

A fixed-bed gasifier and fixed-bed technology, which are applied in fixed-bed gasification, gasification process, manufacture of combustible gas, etc., can solve the problem of difficulty in utilizing tar yield of low-rank coal, and achieve good application prospects and energy utilization. High efficiency and low energy consumption

Active Publication Date: 2019-04-19
CHINA PETROLEUM & CHEM CORP +1
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  • Application Information

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Problems solved by technology

[0006] One of the technical problems solved by the present invention is to overcome the defects of low-rank coals that are difficult to utilize and low tar yields in the prior art, and provide a descending-bed-fixed-bed pyrolysis-gasification integration that is suitable for efficient utilization of low-rank coals The device effectively improves the overall carbon conversion rate of gasification and realizes the characteristics of diversification of gasification products

Method used

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  • Downer-fixed bed pyrolysis-gasification integrated method and device
  • Downer-fixed bed pyrolysis-gasification integrated method and device
  • Downer-fixed bed pyrolysis-gasification integrated method and device

Examples

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Embodiment 1

[0030]The lignite with a particle size of 2 , CO and CH 4 The contents are respectively 39.9%, 20.1%, and 6.3%, and the results are shown in Table 1.

Embodiment 2

[0032] The lignite with a particle size of 2 , CO and CH 4 The contents are respectively 39.2%, 20.2%, and 6.0%, and the results are shown in Table 1.

Embodiment 3

[0034] The lignite with a particle size of 2 , CO and CH 4 The contents are respectively 39.1%, 19.9%, and 6.1%, and the results are shown in Table 1.

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Abstract

The invention relates to a downer-fixed bed pyrolysis-gasification integrated method and device, and the problems that in the prior art, the tar yield is low, the heat transfer efficiency is low, andlow-rank coal is difficult to utilize are mainly solved. A downer pyrolysis furnace and a fixed bed gasification furnace are combined, and the method comprises: raw materials are added from the upperpart of a downer pyrolysis furnace and heated by a gasified product gas from the fixed bed gasification furnace, a pyrolysis reaction is performed, and a pyrolysis gas, tar and coal coke are generated; by separation, a mixed gas of the gasified product gas and the pyrolysis gas is sent to a condensing device for rapid cooling, wherein a condensable gas is cooled to form the tar, and a non-condensable gas is further purified and treated; the coal coke is sent into the fixed bed gasification furnace for gasification reaction to generate a gasified product gas, the high-temperature gasified product gas is sent into a downer pyrolysis furnace to be used as a heat source and a pyrolysis medium required by pyrolysis to carry out pyrolysis reaction, the energy consumption of the whole circulatingsystem is reduced, and the method can be applied to the technical field of coal chemical industry.

Description

technical field [0001] The invention belongs to the technical field of coal pyrolysis and gasification graded utilization, and in particular relates to a method for realizing the coproduction of synthesis gas and tar through the integrated utilization of low-rank coal gasification and pyrolysis graded utilization. Background technique [0002] my country is a country with coal as the main energy structure, which will not change for a long time in the future. According to statistics, coal accounts for 66% of my country's primary energy consumption structure. With the increasing shortage of petroleum resources, the effective use of coal resources has become a strategy for the sustainable development of energy in our country. my country's low-rank coal reserves account for more than 55% of the total coal resources, but its high moisture content, low coalification degree, and low efficiency of direct combustion not only waste resources but also pollute the environment, causing a...

Claims

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Application Information

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IPC IPC(8): C10B49/02C10B53/04C10C1/00C10J3/04C10J3/20C10K1/04
CPCC10B49/02C10B53/04C10C1/00C10J3/04C10J3/20C10J2300/093C10J2300/0959C10J2300/0976C10K1/04Y02P20/10
Inventor 霍威钟思青徐俊屠功毅
Owner CHINA PETROLEUM & CHEM CORP
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