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Revolving bed coal catalytic pyrolysis method

A rotary bed, coal catalysis technology, applied in the direction of indirect heating dry distillation, special form dry distillation, petroleum industry, etc., can solve the problems of easy pulverization and low coal strength, so as to prolong the service life, reduce the energy consumption of forming, and reduce the forming The effect of pressure

Active Publication Date: 2015-09-16
SHENWU TECH GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] Aiming at the deficiencies of the prior art, the present invention proposes a rotary bed coal catalytic pyrolysis method. The method cleverly combines the low strength of the catalyst briquette and the low requirements of the rotary bed pyrolysis furnace for the strength of the incoming materials. It solves the problems of low coal strength and easy pulverization in the pyrolysis process after pulverized coal plus catalyst molding, reduces the dust content in the volatile matter in the coal pyrolysis process, and then reduces the dust content in the tar and increases the tar yield , to improve tar quality

Method used

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  • Revolving bed coal catalytic pyrolysis method
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  • Revolving bed coal catalytic pyrolysis method

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Effect test

Embodiment 1

[0041] The catalyst of this embodiment is Fe 2 o 3 and CaO; the weight percent of pulverized coal molding is: pulverized coal: Fe 2 o 3 : CaO: binder = 79%: 5%: 1%: 15%; molding pressure is 21MPa / piece, drying temperature is 110°C, rotating bed pyrolysis temperature is 500°C, rotating bed processing capacity is 1 million tons / year. The catalytic pyrolysis results are shown in Table 1.

[0042] Table 1 Catalytic pyrolysis results (dry basis)

[0043]

Embodiment 2

[0045] The catalyst of this embodiment is Fe 2 o 3 and CaO; the weight percent of pulverized coal molding is: pulverized coal: Fe 2 o 3 : CaO: binder = 75%: 6%: 2%: 17%; the molding pressure is 22MPa / piece, the drying temperature is 115°C, the pyrolysis temperature of the rotating bed is 550°C, and the processing capacity of the rotating bed is 1 million tons / year. The catalytic pyrolysis results are shown in Table 2.

[0046] Table 2 Catalytic pyrolysis results (dry basis)

[0047]

Embodiment 3

[0049] The weight percent of the pulverized coal molding of the present embodiment is: pulverized coal: Fe 2 o 3 : CaO: binder=74%:4%:3%:19%; molding pressure is 24MPa / piece, drying temperature is 105°C, rotary bed pyrolysis temperature is 550°C, rotary bed processing capacity is 1,000,000 tons / year. The catalytic pyrolysis results are shown in Table 3.

[0050] Table 3 Catalytic pyrolysis results (dry basis)

[0051]

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Abstract

The invention provides a revolving bed coal catalytic pyrolysis method. The method comprises steps of raw coal pretreatment, catalyst preparation, powdered coal shaping with addition of the catalyst, catalyst briquette coal drying, and pyrolysis in a revolving bed thermal decomposition furnace, and the catalyst is a mixture of Fe2O3 and CaO. The method solves the problems that after powdered coal shaping with addition of the catalyst, the briquette coal is low in intensity, and is easy to pulverize during the pyrolysis process. The dust content in tar can be lowered, the tar yield is raised, and the tar quality is improved.

Description

technical field [0001] The invention relates to a rotary bed coal catalytic pyrolysis method. Background technique [0002] According to the prediction of international geologists, low-rank coal is one of the main energy sources that can be used in the future, accounting for more than half of the world's total coal reserves. In the future, how to scientifically, rationally and fully utilize low-rank coal resources will be of great significance to the sustainable development of the coal industry. [0003] Low-rank coal can be converted into gas, tar, semi-coke and other products through pyrolysis, and then realize the clean and comprehensive utilization of resources, so it has been widely valued by scholars at home and abroad. Pyrolysis technology has a research history of hundreds of years. At present, coal pyrolysis technology has problems such as low yield of reaction oil products and high content of heavy components in oil products. Although scholars have done a lot of ...

Claims

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Application Information

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IPC IPC(8): C10B53/08C10B57/10C10B57/06C10B47/30
Inventor 赵小楠王其成吴道洪
Owner SHENWU TECH GRP CO LTD
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