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A method for dry distillation and upgrading of low-metamorphic coal

A low-metamorphic coal and dry distillation technology, which is used in special forms of dry distillation, petroleum industry, coke ovens, etc., can solve the problem of insufficient utilization of low-metamorphic coal, and achieve the effect of being beneficial to efficient utilization, accelerating coking speed and improving economy.

Inactive Publication Date: 2016-04-20
赵昱
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem in the prior art that low metamorphic coal with coking and colloid layers cannot be fully utilized, the present invention provides a method for dry distillation and upgrading of low metamorphic coal, which uses existing coking equipment and improves the existing coking process Transformation is carried out to improve the quality of the low-metamorphic coal, and the yield and output of tar, crude benzene and coke oven gas can be greatly increased while producing qualified chemical coke or metallurgical coke

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of briquettes

[0034] The mixture of 65wt% clean coal and 35wt% flotation coal and coal slime is mixed to obtain the required coal powder. During the process of loading the coal powder into the tamping machine, add some PC polycarbonate pipes and use a tamping hammer Mix the pulverized coal with PC polycarbonate tubes to form briquettes with PC polycarbonate tubes inside, wherein the volume of PC polycarbonate tubes in the formed briquettes is 10% of the volume of briquettes, and the PC polycarbonate tubes The diameter of the carbonate tube is 100-150mm.

[0035] Coking process

[0036] (1) Push the above briquettes into the coke oven for coking, control the coking temperature to 450°C, and coking time to 8 hours, collect the overflowed crude gas, separate and purify the collected crude gas to obtain tar, crude benzene and coke furnace gas.

[0037] (2) After the crude gas fully overflows, raise the temperature of the coke oven to 1000°C and maintain it ...

Embodiment 2

[0039] Preparation of briquettes

[0040] Mix the mixture of 50wt% coarse clean coal, 50wt% flotation coal and coal slime evenly to form the required coal powder. During the process of putting the coal powder into the tamping machine, add several PET pipes and hammer it with a tamping hammer The pulverized coal mixed with the PET tube forms a briquette with a PET tube inside, wherein the volume of the PC polycarbonate tube in the formed briquette is 7% of the volume of the briquette, and the diameter of the PET tube is 5-50mm.

[0041] Coking process

[0042](1) Push the above briquettes into the coke oven for coking, control the coking temperature to 800°C, and coking time to 4 hours, collect the overflowed crude gas, separate and purify the collected crude gas to obtain tar, crude benzene and coke furnace gas.

[0043] (2) After the crude gas fully overflows, raise the temperature of the coke oven to 1000°C and maintain it for 16 hours to obtain the required chemical coke....

Embodiment 3

[0045] Preparation of briquettes

[0046] In the process of putting the pulverized coal into the tamping machine, add some HDPE pipes, hammer the pulverized coal mixed with the HDPE pipes with a tamping hammer to form a briquette with HDPE pipes inside, wherein the pulverized coal composition in this embodiment is Clean coal 60wt%, medium coal 40wt%, the volume of PC polycarbonate tube in the formed briquette is 4% of the volume of briquette, and the diameter of PC polycarbonate tube is 80mm.

[0047] Coking process

[0048] (1) Push the above briquettes into the coke oven for coking, control the coking temperature to 550°C, and coking time to 6 hours, collect the overflowed crude gas, separate and purify the collected crude gas to obtain tar, crude benzene and coke furnace gas.

[0049] (2) After the crude gas fully overflows, raise the temperature of the coke oven to 1100°C and maintain it for 14 hours to obtain the required chemical coke. The yields of coke oven gas, tar...

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Abstract

The invention discloses a method for dry distillation and quality improvement of low-metamorphic coal. According to the method, the dry distillation and quality improvement of the low-metamorphic coal are carried out by adopting a tamping coking process. The method comprises the following steps: (1) pushing a coal cake into a coke oven for quality improvement, controlling the coking temperature to be 450-1,000 DEG C and the coking time to be 2-8 hours, and collecting overflowed crude coal gas, wherein a gas guide structure is arranged in the coal cake; and (2) after the crude coal gas is fully overflowed, heating the coke oven to 900-1,400 DEG C, and keeping the temperature for 8-24 hours to obtain a required coke product. According to the method, the structure of a coal cake in a tamping type coke oven is changed and an overflow channel of volatile matters in the coal cake is formed, so that the overflow speed of the volatile matters is increased, the repeated combustion of coke oven gas (containing tar and crude benzene) is reduced, and the coking speed is increased; and moreover, a coking process is adjusted, so that the decomposition loss of the volatile matters traversing a high-temperature region in the coal cake is reduced and the yield of tar, crude benzene and coke oven gas in the coking process is greatly increased.

Description

technical field [0001] The invention relates to a method for upgrading the quality of low-metamorphic coal, in particular to a method for dry distillation and upgrading of low-metamorphic coal with coking and colloid layers by using a tamping coke oven. Background technique [0002] Low-metamorphic coal is the product of the initial stage of coalification, with high water content and volatile matter, low density, poor cohesiveness, and strong chemical reactivity, but poor thermal stability, low calorific value, easy weathering and spontaneous combustion, which mainly include Low metamorphic lignite, long-flame coal, non-caking coal, weakly caking coal and some gas coals, the global low-metamorphic coal resources exceed 510 billion tons, accounting for 49.1% of the world's total coal resources. my country is rich in low-metamorphic coal resources, and the proven reserves of lignite are 130.3 billion tons, accounting for nearly 13% of the national coal reserves. Low-metamorphi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10B53/08C10B57/04
Inventor 赵昱
Owner 赵昱
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