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Carbon offset method for methane synthesis gas prepared from dry distillation gas

A methane synthesis gas and dry distillation gas technology, which is applied in combustible gas purification, liquid scrubbing gas purification, combustible gas purification/transformation, etc., can solve the problems of difficult coal dry distillation enterprise promotion, complicated process, large one-time investment, etc., and achieve improvement The effect of environmental quality, simple process and low equipment investment

Active Publication Date: 2014-06-18
科瑞康洁净能源技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned existing technologies are complicated in process and large in one-time investment, so it is difficult to popularize them in coal dry distillation enterprises in my country

Method used

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  • Carbon offset method for methane synthesis gas prepared from dry distillation gas
  • Carbon offset method for methane synthesis gas prepared from dry distillation gas
  • Carbon offset method for methane synthesis gas prepared from dry distillation gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0087] According to the above-mentioned specific embodiment of the present invention, a kind of method for replenishing carbon by dry distillation coal gas to methane synthesis gas is specifically implemented, and in the method for replenishing carbon described in it:

[0088] Limestone ore composition (wt%): CaO 54.3%, burning loss rate 42.7%, impurity 3.0%.

[0089] The furnace coal is composed of 30% lean coal, 35% 1 / 3 coking coal, 20% fat coal and 15% main coking coal; its quality index (wt%): V adf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%, cohesion index G=74, fineness (≤3mm)=73.6%.

[0090] The coal into the furnace was tested in a 40kg small coke oven (the furnace charge was isolated from the air and continuously heated for 24 hours, the temperature of the center of the furnace charge reached 1100°C before being released from the furnace, and it was cooled to room temperature after coke quenching): the gas production rate of the furnace charge was 353.4 Nm 3 / t;...

Embodiment 2

[0100] Dolomite ore composition (wt%): CaO 30.4%, MgO 21.7%, burning loss rate 47.4%, impurity 0.46%.

[0101] The furnace coal is composed of 30% lean coal, 35% 1 / 3 coking coal, 20% fat coal and 15% main coking coal; its quality index (wt%): V adf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%, cohesion index G=74, fineness (≤3mm)=73.6%.

[0102] The coal into the furnace was tested in a 40kg small coke oven (the charge was continuously heated for 20 hours in isolation from the air, and the center temperature of the charge reached 1050°C before it was released from the furnace, and it was cooled to room temperature after coke quenching): the gas production rate of the charge into the furnace was 353.4 Nm 3 / t; In dry distillation gas before adding carbonate carbon replenishing raw materials: H 2 57.5%, CH 4 24.5%, CO7.5%, CO 2 2.8%, the rest is N 2 、C m h n , O 2 Wait. CO 2 The conversion ratio is calculated as 0.55, and the hydrogen-to-carbon ratio is calculated as 3...

Embodiment 3

[0112] Siderite composition (wt%): FeO 52.7%, burning loss rate 26.3%, impurity 21.0%.

[0113] The furnace coal is composed of 30% lean coal, 35% 1 / 3 coking coal, 20% fat coal and 15% main coking coal; its quality index (wt%): V adf 30.0%, A d 13.5%, FC d 60.6%, S t,d 0.67%, cohesion index G=74, fineness (≤3mm)=73.6%.

[0114] The coal into the furnace was tested in a 40kg small coke oven (the charge was continuously heated for 15 hours in isolation from the air, the center temperature of the charge reached 950°C before being released from the furnace, and it was cooled to normal temperature after coke quenching): the gas production rate of the charge into the furnace was 353.4 Nm 3 / t; In dry distillation gas before adding carbonate carbon replenishing raw materials: H 2 54.5%, CH 4 25.5%, CO10.7%, CO 2 3.7%, the rest is N 2 、C m h n , O 2 Wait. CO 2 The conversion ratio is calculated as 0.55, and the hydrogen-to-carbon ratio is calculated as 3.10. According to ...

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Abstract

The invention discloses a carbon offset method for methane synthesis gas prepared from dry distillation gas. The method is implemented through that a carbonate carbon offset raw material with a mineral powder particle size of less than or equal to 80 meshes is added into retort coal and uniformly mixed, the obtained mixture is added into a dry distillation furnace to heat, red heat furnace charges are cooled to room temperature, the obtained product is sieved so as to obtain a solid clean fuel, and produced CO2 and CO gases are directly fed into the dry distillation gas to match with excess H2 gas, so that the hydrogen-carbon ratio requirement for the synthesis of synthetic oil is met, thereby achieving the purpose of carbon offset. According to the method disclosed by the invention, carbonate minerals are directly added into the retort coal, and a carbon offset effect on dry distillation gas is achieved by using CO2 and CO gases produced by thermal decomposition, therefore, the method has the characteristics of rich raw material sources, simple technological processes, equipment investment saving, low carbon offset cost, good economical efficiency and the like, and can be widely applied to the comprehensive utilization projects of high and medium temperature dry distillation gas.

Description

technical field [0001] The invention relates to a method for producing methane synthesis gas by dry distillation of coal gas, in particular to a carbon replenishing method for adjusting the hydrogen-carbon ratio when dry distillation of coal gas to produce methane synthesis gas. Background technique [0002] Coal combustion is the main way for my country to obtain energy at present and for a long time in the future. The direct combustion of a large amount of coal has led to serious air pollution in my country, frequent haze weather, and ineffective use of chemicals in coal. The waste is serious, resulting in process economy Poor sex. Therefore, the implementation of dry distillation (topping) of coal to fully recover the chemicals contained in coal has formed a broad consensus in the industry on the efficient cascade utilization of coal. [0003] After coal dry distillation gas is recovered by chemical production, the main component is H 2 、CH 4 , CO, CO 2 , N 2 、C m h ...

Claims

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Application Information

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IPC IPC(8): C10B57/06C10B57/14C10B57/16C10K1/00C10K1/08
Inventor 杜文广刘守军张智聪上官炬杨颂
Owner 科瑞康洁净能源技术有限公司
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