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Method for fixed-bed gasification by utilizing cohesive soft coal

A cohesive, fixed-bed technology, applied in fixed-bed gasification, gasification process, bulk chemical production, etc., can solve the problems of low gasification activity and failure to meet conventional gasification, so as to improve gasification activity, High-efficiency breaking action and widening application range

Inactive Publication Date: 2018-05-15
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low gasification activity of caking bituminous coal used for g

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Weigh 1g of K 2 CO 3 Dissolve in 7ml of distilled water to make a solution. Add 7g of Yanzhou gas coal to the solution and stir at 60°C for 60 minutes, and then put the mixture in a drying oven at 105°C for 4 hours. Finally, the dried coal sample is taken out and put into a fixed-bed gasifier for gasification. Found to join K 2 CO 3 The cohesive index of post-gas coal is reduced from 81 to 12, and the reduction rate of carbon dioxide at 1000°C is increased from 40% to 55%.

Embodiment 2

[0017] Weigh 2g of K 2 CO 3 Dissolve in 7ml of distilled water to make a solution, add 7g of Yanzhou coal gas into the solution and stir at 60°C for 60 minutes, and then put the mixture in a drying box for drying at 105°C for 4 hours. Finally, the dried coal sample is taken out and put into a fixed-bed gasifier for gasification. Found to join K 2 CO 3 The cohesive index of post-gas coal is reduced from 81 to 7, and the reduction rate of carbon dioxide at 1000°C is increased from 40% to 65%.

Embodiment 3

[0019] Weigh 1.5g of Na 2 CO 3 Dissolve in 7ml of distilled water to make a solution, add 7g of Yanzhou coal gas into the solution and stir at 60°C for 60 minutes, and then put the mixture in a drying box for drying at 105°C for 4 hours. Finally, the dried coal sample is taken out and put into a fixed-bed gasifier for gasification. Found to join Na 2 CO 3 The caking index of the post-gas-coal decreased from 81 to 17, and the reduction rate of carbon dioxide at 1000°C increased from 40% to 58%.

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PUM

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Abstract

The invention discloses a method for fixed-bed gasification by utilizing cohesive soft coal, and belongs to the technical field of comprehensive utilization of coal. The method selects a catalyst capable of breaking the cohesiveness of the soft coal and improving the gasification activity, and the soft coal is added into a catalyst solution for loading; then catalyst supported raw material coal isdried; and finally fixed-bed gasification is performed on the catalyst supported soft coal. According to the method provided by the invention, the cohesiveness of the catalyst supported raw coal canbe completely broken compared with the cohesiveness of raw coal, and the gasification activity is significantly improved; and the method provided by the invention has the advantages of a simple process, a clean process, a good gasification effect, a small use amount of the catalyst and low costs.

Description

Technical field: [0001] The invention belongs to the technical field of comprehensive utilization of coal, and specifically relates to a method for using caking bituminous coal for fixed-bed gasification. The method breaks the adhesion of caking bituminous coal and is used for fixed-bed gasification. Background technique: [0002] In the coal washing process of my country's coking industry, nearly 200 million tons of low-quality washed medium coal are produced every year. These washed coals are generally burned directly as boiler fuel, which is less economical. If the washed coal of these coking enterprises can be gasified to produce coal gas, its efficient and clean utilization can be realized. Then, because these washed coals have a certain degree of cohesiveness, their cohesiveness must be broken if they are gasified by conventional fixed bed and fluidized bed. [0003] The main methods for breaking the adhesion of caking bituminous coal at home and abroad are pre-oxidation (F...

Claims

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Application Information

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IPC IPC(8): C10J3/02
CPCC10J3/02C10J2300/093C10J2300/0986Y02P20/52
Inventor 赵志刚吴爽查荣轩解乐乐
Owner ANHUI UNIVERSITY OF TECHNOLOGY