A kind of coal catalytic gasification method

A coal catalytic gasification and catalyst technology, applied in the direction of granular/powdered fuel gasification, etc., can solve problems that affect normal production, narrow optional range, safety accidents, etc.

Active Publication Date: 2017-05-31
ENN SCI & TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering that the composition of coal is relatively complex, the range of coal types suitable for each gasifier is narrow, and the influence of coal caking, reactivity, ash melting point, slagging and other indicators on the gasification process It is very important, especially the reactivity and slagging of coal have a great influence on the pressurized fluidized bed coal catalytic gasification technology, so that when the catalytic gasification process is carried out, it is necessary to choose raw materials carefully, otherwise it will seriously affect the production efficiency. Normal operation, even lead to safety accidents

Method used

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  • A kind of coal catalytic gasification method
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  • A kind of coal catalytic gasification method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] Select coal type 1 to investigate whether it is suitable for catalytic gasification process:

[0057] Coal sampling is carried out according to GB475, which will be pulverized and sieved to obtain 80-160 mesh coal; then a certain amount of potassium carbonate catalyst aqueous solution is added for catalyst loading, and the amount of catalyst added is 10% of the coal mass, and the raw materials are dried to obtain The gasified feedstock is labeled Feedstock 1.

[0058] Conduct cohesive inspection of raw material 1: Put raw material 1 into the crucible, open the atmosphere muffle furnace, set the reaction temperature to 700°C, pass water vapor into the furnace to replace the air in the furnace for a period of time after stabilization, and then open the furnace door to Put the sample loading crucible into the furnace, increase the steam flow rate to quickly raise the furnace pressure to 3.5MPa, place it at 3.5MPa and 700°C for 7min, then take out the crucible and place it ...

Embodiment 2

[0064] Select coal type 2 to investigate whether it is suitable for catalytic gasification process:

[0065] Coal sampling is carried out according to GB475, which will be pulverized and sieved to obtain 80-160 mesh coal; then a certain amount of potassium carbonate catalyst aqueous solution is added for catalyst loading, and the amount of catalyst added is 10% of the coal mass, and the raw materials are dried to obtain The gasified feedstock is labeled Feedstock 2.

[0066] Carry out cohesive inspection of raw material 2: Put raw material 2 into the crucible, open the atmosphere muffle furnace, set the reaction temperature to 700°C, pass water vapor into the furnace to replace the air in the furnace for a period of time after stabilization, and then open the furnace door to Put the sample loading crucible into the furnace, increase the steam flow rate to quickly raise the furnace pressure to 3.5MPa, place it at 3.5MPa and 700°C for 7min, then take out the crucible and place i...

Embodiment 3

[0073] The coal type 3 to be used in the catalytic gasification process will be sampled according to GB475, and will be pulverized and sieved to obtain 80-160 mesh coal, which will be marked as raw material 1; after that, a certain amount of potassium carbonate catalyst aqueous solution is added to carry out catalyst loading. The addition amount is 10% of the coal mass, and the raw material for preparation is dried to obtain the gasification raw material, which is marked as raw material 2.

[0074] Carry out cohesive inspection of raw material 2: Put raw material 2 into the crucible, open the atmosphere muffle furnace, set the reaction temperature to 700°C, pass water vapor into the furnace to replace the air in the furnace for a period of time after stabilization, and then open the furnace door to Put the sample loading crucible into the furnace, increase the steam flow rate to quickly raise the furnace pressure to 3.5MPa, place it at 3.5MPa and 700°C for 7min, then take out t...

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Abstract

The invention provides a coal catalytic gasification method, belonging to the field of coal catalytic gasification, capable of quickly selecting a coal type suitable for a catalytic gasification process, avoiding the risk of slagging in a gasification furnace, and realizing stable operation of the gasification process. The coal catalytic gasification method includes: using a catalyst to load coal to produce a catalyst-loaded coal, and performing a gasification reaction on the catalyst-loaded coal and a gasification agent in a reactor main body; The product is discharged from the reactor through the gas outlet line, and the solid product is discharged from the reactor through the gas control slagging device; wherein, the coke slag characteristic of the catalyst-loaded coal is ≤3; the carbon conversion rate of the catalyst-loaded coal is >60%; the The catalyst-loaded coal is not prone to slagging; and / or the catalyst recovery rate of the catalyst-loaded coal is >90%. The invention can be used in coal catalytic gasification technology using fluidized bed reactor.

Description

technical field [0001] The invention relates to the field of coal catalytic gasification, in particular to a coal catalytic gasification method. Background technique [0002] my country's energy structure is characterized by "short of oil, less gas, and rich in coal". The development of coal-based clean energy is an effective way to solve the problem of energy supply. Coal-to-natural gas has the highest energy efficiency and is the most effective way to utilize coal. [0003] The coal catalytic gasification process adopts fluidized bed gasification, combined with the characteristics of the fluidized bed itself, the selected coal type is non-sticky or weakly cohesive coal, otherwise pyrolysis is easy to stick, causing the fluidized bed to lose fluidization and fail to operate; In order to meet the requirement of high content of methane in the product gas, limited by the thermodynamic equilibrium, the reaction needs to be carried out at higher pressure and lower temperature, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10J3/54
Inventor 毛燕东金亚丹裴增楷李克忠郑岩
Owner ENN SCI & TECH DEV
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