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Pulverized coal fluidization catalytic gasification device and method

A fluidized bed gasifier and pulverized coal technology, which is applied in the gasification process, the manufacture of combustible gas, the production of bulk chemicals, etc., can solve the problem of low methane yield, low utilization rate of pulverized coal, and difficulty in utilizing low-rank coal, etc. question

Pending Publication Date: 2021-04-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The object of the present invention is to provide a pulverized coal pyrolysis, combustion, Gasification coupled pulverized coal fluidized catalytic gasification device and method

Method used

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  • Pulverized coal fluidization catalytic gasification device and method
  • Pulverized coal fluidization catalytic gasification device and method
  • Pulverized coal fluidization catalytic gasification device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] The reaction process is as follows: the raw material is sent into the fast bed pyrolysis furnace (3) by the feeder (1), mixed with the high-temperature gasified semi-coke / ash from the gasification furnace, heated, and pyrolysis reaction occurs, and the pyrolysis gas and The pyrolyzed semi-coke enters the fluidized bed gasifier (5). Wherein, pyrolysis semi-coke is in contact with gasification agent D, and gasification reaction and tar cracking reaction occur in fluidized bed gasification furnace (5) and fast bed gasification furnace (6) to generate synthesis gas. While the gasification reaction takes place in the fast bed gasifier (6), water vapor E is introduced into the fast bed water vapor shift zone (8), and the water vapor shift reaction occurs to adjust H 2 / CO ratio, the circulating synthesis gas is fed into the fast bed methanation zone (9), and the methanation reaction occurs to increase the yield of methane in the product. The synthesis gas that entrains the s...

Embodiment 2

[0076] The reaction process is the same as in Example 1. The raw material in the reaction process is lignite. The pyrolysis pressure of the fast bed pyrolysis furnace (3) is 0, the pyrolysis temperature is 400°C, and the average density of pulverized coal in the fast bed pyrolysis furnace (3) is 200 kg / m 3 , fast bed pyrolysis furnace (3) inner superficial velocity 1.0 m / s; fluidized bed gasification furnace (5) gasification pressure 0, gasification temperature 700 ℃, average density of pulverized coal 200 kg / m 3 , the average superficial linear velocity in the fluidized bed gasifier (8) is 1.2 m / s; the gasification pressure in the fast bed gasification / pyrolysis zone (7) is 0, and the gasification temperature is 700°C; the fast bed water vapor transformation zone The gasification pressure of (8) is 0 and the gasification temperature is 700°C; the gasification pressure of the fast bed methanation zone (9) is 0 and the gasification temperature is 700°C; the average density of ...

Embodiment 3

[0078] The reaction process is the same as in Example 1. The raw material in the reaction process is lignite. The pyrolysis pressure of the fast bed pyrolysis furnace (3) is 0, the pyrolysis temperature is 800°C, and the average density of pulverized coal in the fast bed pyrolysis furnace (3) is 200 kg / m 3 , fast bed pyrolysis furnace (3) inner superficial velocity 1.0 m / s; fluidized bed gasification furnace (5) gasification pressure 0, gasification temperature 1200 ℃, average density of pulverized coal 200 kg / m 3 , the average superficial velocity in the fluidized bed gasifier (8) is 1.2 m / s; the gasification pressure in the fast bed gasification / pyrolysis zone (7) is 0, and the gasification temperature is 1200°C; the fast bed water vapor transformation zone The gasification pressure of (8) is 0 and the gasification temperature is 1000°C; the gasification pressure of the fast bed methanation zone (9) is 0 and the gasification temperature is 900°C; the average density of pulv...

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Abstract

The invention discloses a pulverized coal fluidized catalytic gasification device. The device comprises: a feeder; a fast bed pyrolyzing furnace, which is connected with the feeder through a feeding inclined pipe; a fluidized bed gasification furnace, which is connected with the fast bed pyrolzing furnace; a fast bed gasification furnace, the lower inlet of which is connected with an upper outlet of the fluidized bed gasification furnace; a fluidized bed combustion chamber, the upper inlet of which is connected with a lower outlet of the fluidized bed gasification furnace; and a fine powder settling / stripping apparatus, which is connected with the fast bed pyrolyzing furnace through a gasification inclined pipe. The invention further discloses a pulverized coal fluidized catalytic gasification method. The device and method provided by the invention have the characteristics of high carbon conversion rate, high gasification strength, high pulverized coal utilization rate, wide adaptability of gasified coal types, reasonable energy utilization and stable and efficient operation of the device.

Description

technical field [0001] The invention belongs to the field of coal gasification, and relates to a device and method for pulverized coal fluidized catalytic gasification. Background technique [0002] Coal, oil, and natural gas are the world's three major primary energy sources, of which coal accounts for about 79% of the world's energy reserves. Coal is one of the main fuel resources for generating power, heat, coal coke processing, and by-product asphalt. 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, in 2015, coal accounted for 63.7% 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 coa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10J3/64C10J3/72C10J3/84
CPCC10J3/64C10J3/72C10J3/721C10J3/723C10J3/725C10J3/84C10J2300/0916C10J2300/093C10J2300/0969C10J2300/0976C10J2300/0986C10J2300/1223Y02P20/52
Inventor 钟思青徐俊霍威高攀
Owner CHINA PETROLEUM & CHEM CORP
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