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Fluidized bed reaction device and reaction method for coal catalytic gasification for producing methane-rich synthetic gas

A technology for methane synthesis gas and coal catalytic gasification, which is used in the gasification of granular/powdered fuels, the manufacture of combustible gases, and the production of bulk chemicals, which can solve the problems of low carbon conversion rate, low methane yield, and complex structure. , to achieve the effect of improving carbon conversion rate, simple and compact structure, and prolonging residence time

Active Publication Date: 2017-04-26
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] One of the technical problems mainly solved by the present invention is the problems of low carbon conversion rate, low methane yield, high energy consumption and complicated structure in the prior art. Fluidized bed reaction device for syngas, which is composed of gasification reaction section and methanation reaction section, which simplifies the furnace structure, reduces equipment investment, realizes self-heating reaction and full utilization of energy, and improves carbon conversion rate and methane yield

Method used

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  • Fluidized bed reaction device and reaction method for coal catalytic gasification for producing methane-rich synthetic gas
  • Fluidized bed reaction device and reaction method for coal catalytic gasification for producing methane-rich synthetic gas

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Embodiment 1

[0036] In this embodiment, the inner diameter of the lower space of the gasification device is 0.1m, and the height is 5m. The inner diameter of the upper space is 0.2m, and the height is 6m. The two-layer gas distributor is set, and the air holes are evenly arranged along the circumference. There are 10 circles of air holes. The ratio is 2%, the angle between the inclined surface of the gas distributor and the horizontal axis is 30°, and an auxiliary feed port is set to supplement the catalyst. In the experiment, Inner Mongolia lignite was selected, and it was crushed to make pulverized coal below 1mm. Potassium carbonate was used as the catalyst, and 10% potassium carbonate catalyst was mixed with pulverized coal evenly. After drying for 24 hours, a mixture with a water content of less than 5% was obtained. Supplementary Potassium carbonate catalyst was 10% of the downspace catalyst. The mixture of pulverized coal and catalyst is added to the gasifier, high-temperature water...

Embodiment 2

[0038] In this embodiment, the inner diameter of the lower space of the gasification device is 0.1m, and the height is 5m. The inner diameter of the upper space is 0.3m, and the height is 6m. The two-layer gas distributor is set, and the air holes are evenly arranged along the circumference. There are 10 circles of air holes. The ratio is 2%, the angle between the inclined surface of the gas distributor and the horizontal axis is 30°, and an auxiliary feed port is set to supplement the catalyst. In the experiment, Inner Mongolia lignite was selected, and it was crushed to make pulverized coal below 1mm. Potassium carbonate was used as the catalyst, and 10% potassium carbonate catalyst was mixed with pulverized coal evenly. After drying for 24 hours, a mixture with a water content of less than 5% was obtained. Supplementary Potassium carbonate catalyst was 10% of the downspace catalyst. The mixture of pulverized coal and catalyst is added to the gasifier, high-temperature water...

Embodiment 3

[0040] In this embodiment, the inner diameter of the lower space of the gasification device is 0.1m, and the height is 5m. The inner diameter of the upper space is 0.3m, and the height is 6m. The two-layer gas distributor is set, and the air holes are evenly arranged along the circumference. There are 20 circles of air holes. The ratio is 2%, the angle between the inclined surface of the gas distributor and the horizontal axis is 30°, and an auxiliary feed port is set to supplement the catalyst. In the experiment, Inner Mongolia lignite was selected, and it was crushed to make pulverized coal below 1mm. Potassium carbonate was used as the catalyst, and 10% potassium carbonate catalyst was mixed with pulverized coal evenly. After drying for 24 hours, a mixture with a water content of less than 5% was obtained. Supplementary Potassium carbonate catalyst was 10% of the downspace catalyst. The mixture of pulverized coal and catalyst is added to the gasifier, high-temperature water...

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Abstract

The invention relates to a fluidized bed reaction device and reaction method for coal catalytic gasification for producing methane-rich synthetic gas. The problems of low carbon conversion rate, low methane yield, high energy consumption and complex structure in the prior art are solved in the invention. The device is formed by a lower space gasification reaction segment and an upper space methane synthesis segment, the internal diameter of the upper space is greater than the internal diameter of the lower space, and the bottoms of the two spaces are respectively provided with a primary gas distributor and a secondary gas distributor. The method comprises the following steps: raw coal, a catalyst, an oxygen-containing gas and water vapor undergo a combustion gasification reaction in the lower space, synthetic gas generated in the gasification reaction is mixed with parts of circulating synthetic gas in the upper space, and a methanation reaction is carried out in order to generate the methane-rich synthetic gas. The device and the method well solve the problems, and can be applied to the field of coal-to-natural gas.

Description

technical field [0001] The present invention relates to a reaction device and method for coal gasification to produce methane, more specifically, the present invention relates to a device and method for producing methane-enriched gas by gasification and methanation reaction staged coal catalytic gasification. Background technique [0002] Natural gas is a high-quality fuel and an important chemical raw material, with the advantages of safety, reliability, and environmental protection. With the rapid development of my country's economy and the acceleration of urbanization, the demand for natural gas is increasing. my country's own natural gas production cannot meet the demand for natural gas, and the contradiction between supply and demand has become increasingly prominent. The supply gap can only be made up by relying on imports, which has greatly affected my country's energy security. Given that my country is a large coal country with abundant coal output, coal consumption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/54C10J3/56C10J3/84C10J3/72
CPCY02P20/52
Inventor 金渭龙顾松园钟思青金永明
Owner CHINA PETROLEUM & CHEM CORP
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