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System used for producing lightweight aromatic hydrocarbons from low grade coal and having water recovering system, and method thereof

A recovery system and low-rank coal technology, applied in chemical instruments and methods, carbon monoxide, acetylene generators, etc., can solve the problems of low output of light aromatics and reduced output of aromatics

Pending Publication Date: 2017-09-29
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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  • System used for producing lightweight aromatic hydrocarbons from low grade coal and having water recovering system, and method thereof
  • System used for producing lightweight aromatic hydrocarbons from low grade coal and having water recovering system, and method thereof
  • System used for producing lightweight aromatic hydrocarbons from low grade coal and having water recovering system, and method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125] Such as Figure 1-3 As shown, quicklime with a particle size below 20 μm and low-rank coal are mixed at a mass ratio of 1.1:1, and an appropriate amount of binder is added to press balls, and the diameter of the pellets is controlled to be 10-40 mm. The pellets are sent to the rotary bed pyrolysis device, the coal pyrolysis temperature in the rotary bed is 800°C, and the pyrolysis time is 1h. The obtained upgraded pellets are thermally loaded into a 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 low-rank coal and 1100kg of quicklime can obtain 370kg of acetylene, 83kg of hydrogen, 220kg of methane, 31kg of carbon dioxide and 420kg of carbon monoxide. The resulting acetylene, hydrogen, methane, carbon dioxide and 221kg of ...

Embodiment 2

[0128] Such as Figure 1-3 As shown, quicklime with a particle size below 20 μm and low-rank coal are mixed at a mass ratio of 1.4:1, and an appropriate amount of binder is added to press balls, and the diameter of the pellets is controlled to be 10-40 mm. The pellets are sent to the rotary bed pyrolysis device, the coal pyrolysis temperature in the rotary bed is 600°C, and the pyrolysis time is 2h. The obtained upgraded pellets are thermally loaded into a 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.

[0129] Through this system, 1000kg of low-rank coal and 1400kg of quicklime can obtain 387kg of acetylene, 73kg of hydrogen, 195kg of methane, 27kg of carbon dioxide and 435kg of carbon monoxide. The resulting acetylene, hydrogen, methane, carbon dioxide and 286kg of ...

Embodiment 3

[0131] Such as Figure 1-3 As shown, quicklime with a particle size below 20 μm and low-rank coal are mixed at a mass ratio of 1.1:1, and an appropriate amount of binder is added to press balls, and the diameter of the pellets is controlled to be 10-40 mm. The pellets are sent to the rotary bed pyrolysis device, the coal pyrolysis temperature in the rotary bed is 700°C, and the pyrolysis time is 1.5h. The obtained upgraded pellets are thermally loaded into a 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.

[0132] Through this system, 1000kg of low-rank coal and 1100kg of quicklime can obtain 381kg of acetylene, 77kg of hydrogen, 204kg of methane, 29kg of carbon dioxide and 430kg of carbon monoxide. The resulting acetylene, hydrogen, methane, carbon dioxide and 262kg o...

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Abstract

The invention relates to a system for producing light aromatics from low-rank coal. The system includes a mixer, a briquetting machine, a rotary bed pyrolysis device, a calcium carbide furnace, an acetylene generator, an oil-gas separator, a purification device, and a reaction for producing aromatics from acetylene devices, separation systems, natural settlers, evaporative concentrators and mixing tanks. The invention also relates to a method of producing light 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 low-rank coal, and more specifically, to a system and method for producing light aromatics from low-rank coal. Background technique [0002] my country's energy structure has always been coal-rich, oil-poor, and gas-poor. 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)", which significantly improved the status of coal classification and utilization, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B57/18C10B57/00C10H19/00C10H21/00C07C2/48C07C15/02C01B32/942C01B32/40
CPCC10B53/04C07C1/325C07C2/48C10B57/005C10B57/18C10H19/00C10H21/00
Inventor 许梅梅闫琛洋于家琳史雪君吴道洪
Owner BEIJING HUAFU ENG
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