Method for preparing coal tar by carrying out catalytic pyrolysis on pulverized coal and device thereof

A technology of catalytic pyrolysis and coal tar, which is applied in the field of coal chemical industry, can solve problems such as the limitation of scale-up production, achieve the effect of reducing secondary cracking and increasing yield

Active Publication Date: 2011-01-05
王树宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The MRF pyrolysis method invented by the Beijing Institute of Coal Chemistry produces coal tar. The main equipment used is a rotary furnace. Lignite, long-bituminous coal and weakly sticky coal are used as raw materials, and the scale-up of production is limited.

Method used

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  • Method for preparing coal tar by carrying out catalytic pyrolysis on pulverized coal and device thereof
  • Method for preparing coal tar by carrying out catalytic pyrolysis on pulverized coal and device thereof
  • Method for preparing coal tar by carrying out catalytic pyrolysis on pulverized coal and device thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] in figure 1 In this embodiment, the device for producing coal tar by catalytic pyrolysis of pulverized coal consists of a catalytic pyrolysis reactor 1, a heating riser 2, a circulating gas blower 3, a raw gas purification device 4, a gas blower 5, and a high-temperature semi-coke heat exchanger 6. , The heating furnace 7, the flue gas induced draft fan 8, and the high temperature gas heat exchanger 9 are connected together.

[0034] The upper outlet of the catalytic pyrolysis reactor 1 is connected to the inlet of the raw gas purification device 4 through a pipeline, and the middle outlet is connected to the inlet of the lower end of the heating riser 2 through a valve installed on the pipeline, and is exchanged with high temperature semi-coke through the pipeline. The middle inlet of the heat exchanger 6 is connected, the heating furnace 7 is connected with the inlet of the heating riser 2 through a pipe, the middle outlet of the heating riser 2 is connected with the semi...

Embodiment 2

[0050] In this embodiment, the vertical section of the pyrolysis reaction tube 1-5 of the catalytic pyrolysis reactor 1 and the annular closed partition 1-2 are welded and connected with four cyclone tubes 1-3, the cyclone tubes 1-3 and the heat The dereaction tubes 1-5 are in communication with each other, pass through the flow guide tubes 1-4, and the free ends extend outside the tube wall of the flow guide tubes 1-4, and the free ends are processed into a downward spiral shape. The angle between the oblique wall of the necking section of the outer cylinder 1-6 and the horizontal plane is 36°C. The gas distributor 1-11 of the catalytic pyrolysis reactor 1 is processed with 3 circles of pores arranged in concentric circles. One of the pores in one circle is arranged on the same radius as the one in the adjacent circle. The pores in the circle and the pores in the adjacent circle can also be staggered, and the pore diameter is 12mm. The support plate 1-10 of the catalytic pyro...

Embodiment 3

[0053] In this embodiment, the vertical section of the pyrolysis reaction tube 1-5 of the catalytic pyrolysis reactor 1 and the annular closed partition 1-2 are welded and connected with 8 cyclone tubes 1-3, the cyclone tubes 1-3 and the heat The dereaction tubes 1-5 are in communication with each other, pass through the flow guide tubes 1-4, and the free ends extend outside the tube wall of the flow guide tubes 1-4, and the free ends are processed into a downward spiral shape. The angle between the oblique wall of the necking section of the outer cylinder 1-6 and the horizontal plane is 60°. The gas distributor 1-11 of the catalytic pyrolysis reactor 1 is processed with 20 circles of pores arranged in concentric circles. One of the pores in one circle is arranged on the same radius as the one in the adjacent circle. The pores in the circle and the pores in the adjacent circle can also be arranged staggered, and the pore diameter is 8mm. The support plate 1-10 of the catalytic...

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Abstract

The invention discloses a method for preparing coal tar by carrying out catalytic pyrolysis on pulverized coal and a device thereof. The device thereof is characterized in that the upper outlet of a catalytic pyrolysis reactor is communicated with the inlet of a crude gas purification device, and the middle outlet thereof is communicated with the lower inlet of a heating riser tube and the middleinlet of a high-temperature carbocoal heat exchanger; a heating furnace is communicated with the inlet of the heating riser tube; the middle outlet of the heating riser tube is communicated with the carbocoal inlet of the catalytic pyrolysis reactor, and the upper outlet thereof is communicated with the smoke inlet of a high-temperature gas heat exchanger; the outlet of the crude gas purificationdevice is communicated with the gas input end of the high-temperature gas heat exchanger through a circulating gas blower, and the lower outlet thereof is communicated with the inlet of the high-temperature carbocoal heat exchanger through a gas blower; one output port of the high-temperature gas heat exchanger is communicated with the catalytic pyrolysis reactor, and the other output port thereof is communicated with the inlet of the heating riser tube through a smoke draught fan; and the outlet of the high-temperature carbocoal heat exchanger is communicated with the inlet pipeline of the catalytic pyrolysis reactor. The method comprises: circulating carbocoal powder heating, pulverized coal catalytic pyrolytic reaction, coal tar recovery and residual-heat utilization.

Description

Technical field [0001] The invention belongs to the technical field of coal chemical industry, and specifically relates to a method and a device for preparing coal tar by catalytic pyrolysis of pulverized coal. Background technique [0002] Over the years, extensive research has been done on the methods and devices for producing coal tar, coal gas and semi-coke by low-temperature pyrolysis of coal at home and abroad. [0003] Germany adopts the Lurgi method to prepare coal tar. The main equipment used is a vertical moving bed with the generated gas as the heat source. This method reduces the yield due to the secondary decomposition of tar, and the structure of the retort furnace is complex. limit. [0004] The former Soviet Union used the ETCH-175 method to prepare coal tar. The coal solid heat carrier used to pyrolyze lignite in a moving bed has the main disadvantages of low separation efficiency of coke powder in raw gas and low yield of prepared coal tar. [0005] One method used ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G1/00
Inventor 王树宽杨占彪
Owner 王树宽
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