Coal-into-aromatic hydrocarbon preparation system having flue gas reuse function and method

A technology for aromatics and flue gas, applied in chemical instruments and methods, organic chemistry, hydrocarbons, etc., can solve the problems of reduced aromatics output and light aromatics output, and achieve the effect of large heat capacity and good heat storage effect

Pending Publication Date: 2017-09-26
BEIJING HUAFU ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the yield of coal tar obtained by coal dry distillation is low, generally less than 5%, while the <200°C fraction in coal tar is less than 30%, and the content of light components in high-temperature coal tar is lower, so the light aromatics produced by this method The output is small, and coal resources are not fully utilized to produce aromatics, which cannot fundamentally solve the problem of reduced aromatics production caused by the lack of oil resources

Method used

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  • Coal-into-aromatic hydrocarbon preparation system having flue gas reuse function and method
  • Coal-into-aromatic hydrocarbon preparation system having flue gas reuse function and method
  • Coal-into-aromatic hydrocarbon preparation system having flue gas reuse function and method

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Experimental program
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Effect test

Embodiment 1

[0122] Such as Figure 1-3 As shown, the limestone is crushed to be below 45mm, and the particle size is selected to be 5-45mm, and transported to the first coke oven 3 by belt for firing. The medium and low rank coal is crushed to below 25mm, and the particle size is selected to be 5-25mm, and transported to the second coke oven 4 for pyrolysis via a belt. The mass ratio of low-rank coal to limestone is 1:2, and the heating temperature of the combustion chamber of the coke oven is 1000°C. After 12 hours of firing and pyrolysis, the upgraded coal and quicklime enter the mixing tank 5 for mixing, and the mixed material is put into the high-level trough of the calcium carbide production system, and then put into the calcium carbide furnace 6 to produce calcium carbide. The calcium carbide produced is cooled and pulverized, the particle size of the calcium carbide is controlled between 50-80mm, and it enters the acetylene generator 7 to react to obtain acetylene.

[0123] Throu...

Embodiment 2

[0125] Such as Figure 1-3 As shown, the limestone is crushed to less than 45mm, with a particle size of 5-45mm, and transported by belt to the first coke oven for firing. The medium and low-rank coal is crushed to below 25mm, with a particle size of 5-25mm, and transported to the second coke oven for pyrolysis via a belt. The mass ratio of low-rank coal to limestone is 1:1, and the heating temperature of the coke oven combustion chamber is 1000°C. After 12 hours of firing and pyrolysis, the upgraded coal and quicklime enter the mixing tank for mixing, and the mixed material is put into the high-level trough of the calcium carbide production system, and then put into the calcium carbide furnace to produce calcium carbide. The calcium carbide produced is cooled and pulverized, and the particle size of the calcium carbide is controlled between 50 and 80 mm, and then enters the acetylene generator to react to obtain acetylene.

[0126] Through this system, 1000kg of medium and ...

Embodiment 3

[0128] Such as Figure 1-3 As shown, the limestone is crushed to be below 45mm, and the particle size is selected to be 5-45mm, and transported to the first coke oven 3 by belt for firing. The medium and low rank coal is crushed to below 25mm, and the particle size is selected to be 5-25mm, and transported to the second coke oven 4 for pyrolysis via a belt. The mass ratio of low-rank coal to limestone is 1:2, and the heating temperature of the coke oven combustion chamber is 1000°C. After 12 hours of firing and pyrolysis, the upgraded coal and quicklime enter the mixing tank 5 for mixing, and the mixed material is put into the high-level trough of the calcium carbide production system, and then put into the calcium carbide furnace 6 to produce calcium carbide. The calcium carbide produced is cooled and pulverized, the particle size of the calcium carbide is controlled between 50-80mm, and it enters the acetylene generator 7 to react to obtain acetylene.

[0129] Through this...

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Abstract

The invention relates to a system for preparing aromatics from coal with the function of flue gas recycling. The system includes a material pretreatment system, a purification system, a calcium carbide furnace, an acetylene generator and an acetylene-producing aromatics reactor. The invention also relates to methods of producing aromatics using the system. The invention prepares aromatics from coal, solves the problem of limited output of aromatics due to limited petroleum resources, and realizes the conversion process from low-value low-rank coal to high value-added aromatics.

Description

technical field [0001] The invention relates to a combined process for preparing light aromatics from coal, more specifically, to a system and method for producing acetylene, hydrogen, etc. from low-rank coal and limestone, and then producing light aromatics from acetylene. Background technique [0002] my country's energy structure has always been rich in coal, poor in oil, and low in gas, and its coal reserves can reach 17% of the world's coal reserves. Among them, lignite, long-flame coal and other low-rank coal resources are abundant, accounting for more than 50% of my country's coal reserves and coal production. However, due to the high water content of low-rank coal, direct combustion or gasification efficiency is low, and existing technologies cannot make full use of their resources. value, resulting in a huge waste of coal resources. In April 2015, the National Energy Administration issued the "Action Plan for Clean and Efficient Utilization of Coal (2015-2020)", whi...

Claims

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Application Information

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IPC IPC(8): C07C2/48C07C15/02
CPCC07C2/48
Inventor 许梅梅闫琛洋于家琳史雪君吴道洪
Owner BEIJING HUAFU ENG
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