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Circulating fluidized bed-entrained bed combined gasification method and device

A circulating fluidized bed and combined gasification technology, which is applied in gasification process, granular/powder fuel gasification, production of combustible gas, etc., can solve problems such as difficulty in utilizing low-rank coal

Active Publication Date: 2020-07-07
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 solved by the present invention is to overcome the defects of the prior art and provide a circulating fluidized bed-entrained bed combined gasification device, which effectively improves the overall carbon conversion rate of gasification and solves the problem of low-order Coal is difficult to use and realize the characteristics of diversification of gasification products

Method used

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  • Circulating fluidized bed-entrained bed combined gasification method and device
  • Circulating fluidized bed-entrained bed combined gasification method and device

Examples

Experimental program
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Effect test

Embodiment 1

[0030] The lignite raw material containing papermaking black liquor is transported from the raw material inlet of the circulating fluidized bed riser 1 to its furnace, and the gasification agent with a ratio of 20:100 of oxygen and water vapor from the gas distributor 6 is used at an operating temperature of 700°C The reaction takes place under the environment to generate methane-rich synthesis gas and high-temperature semi-coke particles. After being separated by the first cyclone separator 2, the methane-rich first product gas D and CO which can be used as industrial fuels are obtained. 2 , wherein the first product gas D active ingredient H 2 , CO and CH 4 The contents are 41.3%, 19.6%, and 6.5%, respectively. The high-temperature semi-coke particles continue to undergo gasification reaction in the circulating fluidized bed reactor. As the combustibles in the high-temperature semi-coke particles are continuously consumed, the first ash E is finally formed, and falls from ...

Embodiment 2

[0032] The lignite raw material containing papermaking black liquor is transported from the raw material inlet of the circulating fluidized bed riser 1 to its furnace, and the gasification agent with a ratio of 25:100 of oxygen and water vapor from the gas distributor 6 is used at an operating temperature of 850°C The reaction takes place under the environment to generate methane-rich synthesis gas and high-temperature semi-coke particles. After being separated by the first cyclone separator 2, the methane-rich first product gas D and CO which can be used as industrial fuels are obtained. 2 , wherein the first product gas D active ingredient H 2 , CO and CH 4 The contents are 39.9%, 20.1%, and 7.1%, respectively. The high-temperature semi-coke particles continue to undergo gasification reaction in the circulating fluidized bed reactor. As the combustibles in the high-temperature semi-coke particles are continuously consumed, the first ash E is finally formed, and falls from ...

Embodiment 3

[0034] The lignite raw material containing papermaking black liquor is transported from the raw material inlet of the circulating fluidized bed riser 1 to its furnace, and the gasification agent with a ratio of 25:100 of oxygen and water vapor from the gas distributor 6 is used at an operating temperature of 850°C The reaction takes place under the environment to generate methane-rich synthesis gas and high-temperature semi-coke particles. After being separated by the first cyclone separator 2, the methane-rich first product gas D and CO which can be used as industrial fuels are obtained. 2 , wherein the first product gas D active ingredient H 2 , CO and CH 4 The contents are 39.9%, 20.1%, and 7.1%, respectively. The high-temperature semi-coke particles continue to undergo gasification reaction in the circulating fluidized bed reactor. As the combustibles in the high-temperature semi-coke particles are continuously consumed, the first ash E is finally formed, and falls from ...

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Abstract

The invention relates to a CFB (circulating fluidized bed)-entrained flow bed combined gasification method and device and solves the problems of poor coal applicability and low carbon conversion ratein the prior art. With the adoption of combination of a CFB reactor and an entrained flow bed reactor, the method comprises steps as follows: low-rank coal containing a catalyst reacts with a gasifying agent in the CFB reactor to produce synthesis gas rich in methane, ash residues serving as the raw material and the catalyst of the entrained flow bed reactor are sent into the entrained flow bed reactor through nozzles to impact with high-rank coal or petroleum coke and subjected to a reaction under the action of the gasifying agent, synthesis gas is produced, therefore, carbon residues in theash residues of the CFB reactor are effectively utilized, the carbon conversion rate is increased, and wide raw material adaptability to the low-rank coal, the high-rank coal and petroleum coke is realized.

Description

technical field [0001] The invention belongs to the field of coal gasification, and in particular relates to a gasification method and device for segmented gasification of circulating fluidized bed and entrained bed gasification. 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 acid rain, PM2.5, and SOx and NOx and other greenhouse gas emissions. Therefore, coal ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/48C10J3/56C10J3/84C10J3/72
CPCC10J3/485C10J3/56C10J3/72C10J3/84C10J2300/0986Y02P20/52
Inventor 霍威钟思青金渭龙高攀
Owner CHINA PETROLEUM & CHEM CORP
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