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A gasification method for co-production of methane and light tar

A technology for light tar and methane gas, which is used in granular/powder fuel gasification, petroleum industry, gas fuel, etc., and can solve the problems of heavy tar component proportion, low economic benefit, and low coal tar output.

Active Publication Date: 2018-02-27
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the products obtained in the existing process are all methane as the main product, while the output of coal tar with high economic added value is small, and the proportion of heavy tar components in the produced tar is relatively large. The selection, separation and processing of tar products bring a lot of inconvenience, and directly cause low economic benefits

Method used

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  • A gasification method for co-production of methane and light tar
  • A gasification method for co-production of methane and light tar
  • A gasification method for co-production of methane and light tar

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Such as figure 2 As shown, a two-stage fluidized bed gasifier is used, and the diameter ratio of the pyrolysis section to the gasification section is 1. A certain bituminous coal enters the pyrolysis section of the gasifier through the feed port A after the catalyst loading process. After being upgraded in the pyrolysis section, it falls into the gasification section of the gasifier for gasification reaction. The high-concentration methane synthesis gas produced by the catalytic gasification section and the gas and tar produced by the pyrolysis section are discharged from the top of the gasifier, and enter the tar condensation recovery system after cyclone dust removal, and the tar in the gas is separated, and then enters the The low-temperature methanol washing section removes acid gases such as hydrogen sulfide and carbon dioxide, and then enters methane synthesis to obtain high-concentration methane gas (methane content above 96%). Among them, a small part of high-c...

Embodiment 2

[0060] Such as image 3 As shown, a two-stage gasifier is used, and the diameter ratio of the pyrolysis section to the gasification section is 2. A certain bituminous coal enters the pyrolysis section of the gasifier through the feed port A after the catalyst loading process. After being upgraded in the pyrolysis section, it falls into the gasification section of the gasifier for gasification reaction. The high-concentration methane synthesis gas produced by the gasification section and the gas and tar produced by the pyrolysis section are discharged from the top of the gasification furnace, and enter the tar condensation recovery system after cyclone dust removal. After the tar is separated, it enters the low-temperature methanol washing section. Remove acid gases such as hydrogen sulfide and carbon dioxide to obtain methane-containing gas (containing hydrogen 50-55%, methane 28-35%, carbon monoxide 15-18%), and a small part of methane-containing gas returns to the gasifier a...

Embodiment 3

[0064] use Figure 4 Two-stage gasification furnace structure, the diameter ratio of the pyrolysis section and the gasification section is 1. A lignite enters the pyrolysis section of the gasifier through the catalyst loading process through the feed port A. After being upgraded in the pyrolysis section, it falls into the gasification section of the gasifier for gasification reaction. The high-methane-concentration syngas produced by the catalytic gasification section, together with the gas and tar produced by the pyrolysis section, are discharged from the top of the gasifier, and enter the tar condensation recovery system after cyclone dust removal, and part of high-quality superheated steam is generated through heat exchange. The gas from the tar condensation recovery outlet enters the low-temperature methanol washing section, and then undergoes methane synthesis. The high-quality superheated steam obtained by heat exchange is synthesized with methane to obtain high-concent...

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Abstract

The invention provides a gasification method for co-producing methane and light tar, which belongs to the field of coal catalytic gasification and can effectively increase the output of coal tar, especially the output of light tar while generating high-concentration methane. The gasification method includes: the carbonaceous raw material is sequentially passed through the pyrolysis section in the gasification furnace for cracking reaction and the gasification section for gasification reaction to form methane synthesis gas; wherein, the methane-containing gas is introduced into the pyrolysis section , the cracking of methane in the methane-containing gas promotes the generation of light tar. The invention can be used in the gasification process of co-producing methane and light tar.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification, in particular to a gasification method for co-producing methane and light tar. Background technique [0002] Coal catalytic gasification technology is an important way of clean and efficient utilization of coal. Using coal catalytic gasification technology, coal is gasified with a gasification agent composed of water vapor, hydrogen, and carbon monoxide under the catalytic action of a catalyst under certain pressure and temperature conditions. reaction, producing high concentrations of methane. Compared with other coal gasification technologies, coal catalytic gasification technology has the advantages of high methane content, low temperature required for gasification reaction, and by-product tar at the same time. [0003] The existing technology is to pre-mix coal and catalyst into the gasifier, control the temperature in the furnace at about 700°C, and the reaction pressure at about ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/54C10L3/08C10G1/00
Inventor 祖静茹李克忠郑岩
Owner ENN SCI & TECH DEV
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