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Combined fluidized bed reaction device and reaction method for catalytic gasification coupled pyrolysis

A technology of reaction device and combined flow, which is applied in the direction of gasification process, granular/powdered fuel gasification, and production of combustible gas. Higher problems, to achieve high methane yield, high carbon conversion rate, increased tar production and high utilization of pulverized coal

Active Publication Date: 2020-07-03
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] One of the technical problems mainly solved by the present invention is the problems of low carbon conversion rate and gasification intensity, low methane yield and low utilization rate of pulverized coal existing in the prior art. It provides a new catalytic gasification combined fluidization Bed reaction device and reaction method

Method used

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  • Combined fluidized bed reaction device and reaction method for catalytic gasification coupled pyrolysis
  • Combined fluidized bed reaction device and reaction method for catalytic gasification coupled pyrolysis
  • Combined fluidized bed reaction device and reaction method for catalytic gasification coupled pyrolysis

Examples

Experimental program
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Effect test

Embodiment 1

[0033] The reaction process is as follows: the catalyst and carbon-containing raw materials enter the pyrolysis furnace from the feed pipeline for pyrolysis, the tar gas is collected after separation, and the semi-coke particles loaded with the catalyst, gasification agent and oxidant are simultaneously released at a higher line rate after pyrolysis. Partial combustion and gasification reactions are carried out in the fine reactor with high speed and low particle concentration. After the reaction, the large-particle slag falls into the slag pool through natural settlement, and the catalyst recovery equipment separates the slag and recovers the catalyst from the slag pool. The carbon-containing particles reacted in the fine reactor are lifted into the coarse reactor by gas for further gasification reaction. The reacted gas and solids (fine ash, carbon-containing particles and slag, etc.) enter the separation equipment. After separation, the gas and part of the fine ash and carbo...

Embodiment 2

[0036] The reaction process is the same as in Example 1. In the experiment, Inner Mongolia lignite was selected, and it was crushed to make pulverized coal below 1mm and mixed with 5% potassium carbonate catalyst. The diameter of the fine reactor is 50mm, the height is 3000mm, the linear velocity is 2m / s, the water-carbon ratio is 1mol / mol, the reaction temperature is 800°C, and the reaction pressure is 2MPa; the diameter of the coarse reactor is 300mm, the height is 1500mm, and the reaction temperature is 650°C, reaction pressure 2MPa. The loading amount of the catalyst accounts for 5% of the raw coal mass. The amount of circulating synthesis gas accounts for 20% of the total output of the gasification unit, and the ratio of hydrogen to carbon monoxide in the circulating synthesis gas is 1. The pyrolysis furnace selects a bubbling fluidized bed, and the reaction temperature is 600°C. Due to the high separation efficiency, there are very few particles leaving the separation...

Embodiment 3

[0038] The reaction process is the same as in Example 1. In the experiment, Inner Mongolia lignite was selected, and it was crushed to make pulverized coal below 1mm and mixed with 5% potassium carbonate catalyst. The diameter of the fine reactor is 50mm, the height is 3000mm, the linear velocity is 2m / s, the water-carbon ratio is 1mol / mol, the reaction temperature is 800°C, and the reaction pressure is 2MPa; the diameter of the coarse reactor is 150mm, the height is 1500mm, and the reaction temperature is 650°C, reaction pressure 2MPa. The loading amount of the catalyst accounts for 5% of the raw coal mass. The amount of circulating synthesis gas accounts for 20% of the total output of the gasification unit, and the ratio of hydrogen to carbon monoxide in the circulating synthesis gas is 1. The pyrolysis furnace selects a bubbling fluidized bed, and the reaction temperature is 600°C. Due to the high separation efficiency, there are very few particles leaving the separation...

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Abstract

The invention relates to a reaction device and a reaction method for a catalytic gasification coupling and pyrolysis combined fluidized bed, and mainly solves the problems of low carbon conversion rate and gasification intensity, low methane yield and relatively low powdered coal utilization rate in the prior art. Through the technical scheme, according to the reaction device and a reaction methodfor the catalytic gasification coupling and pyrolysis combined fluidized bed, pyrolysis is carried out on a carbon-containing raw material of a supported catalyst in a fluidized bed pyrolysis furnace, tar gas is collected after being separated, partial combustion and a gasification reaction are carried out on semi-coke particles of the supported catalyst after pyrolysis as well as a gasifying agent and an oxidizing agent in a fine reactor, a further gasification reaction is carried out on subsequently generated synthesis gas and the carbon-containing particles without reacting completely in acoarse reactor, and the separated carbon-containing particles and a part of the catalyst in a settler, together with heat, are returned into the pyrolysis furnace; and the above technical problems are solved preferably, so that the reaction device and the reaction method can be applied to industrial production of catalytic coal gasification rich methanogenesis.

Description

technical field [0001] The invention relates to a combined fluidized bed reaction device and reaction method of catalytic gasification coupling pyrolysis. Background technique [0002] my country is a large coal country with abundant coal resources. With the rapid development of my country's economy, the production and consumption of coal have been rising steadily. In 2014, my country's coal production reached 3.87 billion tons, which is close to half of the world's production. . my country has become the world's largest coal producer and coal consumer. The direct combustion of coal releases a large amount of pollutants, which leads to frequent occurrence of smog in many areas of our country and seriously affects the environmental problems. Coal gasification technology is a key technology to achieve clean, efficient and comprehensive utilization of coal, an important way to convert coal, and one of the key technologies for synthetic chemicals, combined cycle power generatio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/56C10J3/72C10J3/84
CPCC10J3/487C10J3/56C10J3/721C10J3/84C10J2300/0986C10J2300/1662C10J2300/1807Y02P20/52
Inventor 徐俊钟思青霍威屠功毅
Owner CHINA PETROLEUM & CHEM CORP
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