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Low-rank coal coking process

A low-rank coal and coking technology, applied in the field of coking process, can solve the problems of expensive raw materials for coking process, low-rank coal cannot be applied on a large scale, low economic benefit in the coking industry, etc. , The effect of not easy to powder

Active Publication Date: 2016-03-16
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that low-rank coal cannot be applied on a large scale in the prior art, the raw materials of the coking process are expensive, and the economic benefits of the coking industry are low, a coking process using low-rank coal as raw material is provided.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] (1) Pulverize the sub-bituminous coal and mix it with auxiliary agents, and use tamping equipment to carry out tamping and molding of the raw coal, wherein the added quality of the auxiliary agent is 40wt% of the quality of the sub-bituminous coal, and the G value of the sub-bituminous coal is 45. The part content is 65%, and the auxiliary agent is asphaltene with a softening point of 105°C, and the asphaltene loses 45% in dry distillation at 850°C in the absence of air;

[0027] (2) Push the formed raw coal into the coke oven for coking, control the coking temperature to 850°C, and coking time for 16 hours, collect the overflowing mixture of crude gas, tar and crude benzene, and obtain coke as a by-product;

[0028] Adopt conventional process to separate crude gas and tar, and further separate crude benzene from tar, the amount of said crude gas obtained is 650Nm 3 / t dry coal, the amount of the tar is 109kg / t dry coal, the amount of the by-product coke is 390kg / t dry ...

Embodiment 2

[0030] (1) Pulverize the sub-bituminous coal and mix it with auxiliary agents, and use tamping equipment to carry out tamping and molding of the raw coal, wherein the added quality of the auxiliary agent is 35wt% of the quality of the sub-bituminous coal, and the G value of the sub-bituminous coal is 40. The content is 70%, and the additive is asphaltene with a softening point of 115°C, and the asphaltene loses 40% in dry distillation at 850°C in the absence of air;

[0031] (2) Push the formed raw coal into the coke oven for coking, control the coking temperature to 900°C, and coking time for 15.5 hours, collect the overflowing mixture of crude gas, tar and crude benzene, and obtain coke as a by-product;

[0032] Adopt conventional process to separate crude gas and tar, and further separate crude benzene from tar, the amount of said crude gas obtained is 680Nm 3 / t dry coal, the amount of the tar is 117kg / t dry coal, the amount of the by-product coke is 360kg / t dry coal, and ...

Embodiment 3

[0034] (1) Pulverize the sub-bituminous coal and mix it with auxiliary agents, and use tamping equipment to carry out tamping and molding of the raw coal, wherein the added quality of the auxiliary agent is 30wt% of the quality of the sub-bituminous coal, and the G value of the sub-bituminous coal is 35. The part content is 45%, and the auxiliary agent is asphaltene with a softening point of 120°C, and the weight loss of the asphaltene is 42% at 850°C in isolated air dry distillation;

[0035] (2) Push the formed raw coal into the coke oven for coking, control the coking temperature to 950°C, and coking time for 17 hours, collect the overflowing mixture of crude gas, tar and crude benzene, and obtain coke as a by-product;

[0036] Adopt conventional process to separate crude gas and tar, and further separate crude benzene from tar, the amount of said crude gas obtained is 450Nm 3 / t dry coal, the amount of the tar is 45kg / t dry coal, the amount of the by-product coke is 586kg / t...

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Abstract

The present invention discloses a low-rank coal coking process, which comprises: (1) crushing low-rank coal, mixing the crushed low-rank coal and an auxiliary agent, and carrying out stamp-charging molding on the raw material coal by using stamp-charging equipment; and (2) pushing the molded raw material coal into a coke oven, coking, and collecting the overflowed crude coal gas, tar and crude benzene mixture while obtaining the byproduct coke, wherein the coking temperature is controlled at more than 800 DEG C, the coking time is not less than 15 h, and the auxiliary agent is an organic binder with air isolated dry distillation weightlessness of less than 50% at a temperature of 850 DEG C. According to the present invention, with the low-rank coal coking process, the problems of low existing stamp-charging coke oven utilization rate and excess coking industry production capacity are solved, and the problem that the application of the low-rank coal is limited due to no large-scale industrial equipment is solved.

Description

technical field [0001] The invention relates to a coking process, in particular to a coking process using low-rank coal as a raw material, and belongs to the technical field of low-rank coal conversion. Background technique [0002] Coal is the main energy source in my country, accounting for about 70% of the primary energy structure. In the long process of geological evolution, the formation of coal is affected by many factors, resulting in various types of coal. According to the structure and composition, coal is divided into three categories: lignite, bituminous coal and anthracite. Bituminous coal is divided into low-metamorphic bituminous coal and medium-metamorphic bituminous coal. Low-metamorphic bituminous coal is also called sub-bituminous coal, which is collectively referred to as "low-rank coal" together with lignite. . Low-rank coal is the product of the initial stage of coalification. It has the characteristics of low carbon content, high moisture, easy pulver...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/08C10B57/06
Inventor 林科杜明来
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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