Down-flow gas semi-coke activated pulverized coal pyrolysis system and method

A semi-coke and coal gas technology, applied in the field of coal chemical industry, can solve the problems of large amount of gas heat carrier, difficulty in dust removal of raw coal gas, easy carbon deposition, etc., achieve low energy consumption, improve coal pyrolysis efficiency, and smooth feeding

Active Publication Date: 2015-03-25
王树宽
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent is a counter-current method, with materials from top to bottom, gas from bottom to top, and heat heated by gas and side walls. This method uses gas heat carrier and indirect heat exchange because the pulverized coal is in a suspended state, and the gas heat carrier The amount is large, and a large amount of fine coal powder is carried out with the gas, which makes it difficult to remove dust from the raw coal gas
The above patents do not propose a targeted and resolute solution for the waste gas dust removal system. According to the fact that the raw gas contains a large amount of coal tar, it is easy to deposit carbon and agglomerate in the temperature range.

Method used

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  • Down-flow gas semi-coke activated pulverized coal pyrolysis system and method
  • Down-flow gas semi-coke activated pulverized coal pyrolysis system and method
  • Down-flow gas semi-coke activated pulverized coal pyrolysis system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Depend on figure 1 It can be seen that the downstream gas semi-coke activated pulverized coal pyrolysis system in this embodiment is composed of an upward heating riser 1, a first-stage cyclone dust collector 2, a second-stage cyclone dust collector 3, a third-stage cyclone dust collector 4, and a high-temperature semi-coke. Coke buffer bin 5, dry coal bunker 6, cyclone mixer 7, downlink reaction pipe 8, oil and gas cyclone dust collector 9, high temperature flue gas heat exchanger 10, semi-coke cooler 11, fixed bed fine dust collector 12, oil washing device 13. Electric tar catcher 14, first L-shaped valve 15, second L-shaped valve 16, third L-shaped valve 17 and vertical mill 18 are connected.

[0032] The high-temperature flue gas heat exchanger 10 of this embodiment is an ordinary flue gas heat exchanger. The gas inlet of the high-temperature flue gas heat exchanger 10 is connected to the gas pipeline outside, the air inlet is connected to the outside atmosphere, an...

Embodiment 2

[0042] The stroke of the descending reaction tube 8 in this embodiment is 40m, and the feeding port of the descending reaction tube 8 is connected with the feeding port of the cyclone mixer 7 , and the feeding port is connected with the feeding port of the oil-gas cyclone dust collector 9 .

[0043]In the oil-gas cyclone dust collector 9 of the present embodiment, four guide vanes installed obliquely are arranged on the outer wall of the lower end of the vortex inner tube. The outlet angle of the guide vanes is 25°. The vortex outer tube is sealed at the top of the vortex outer tube and the vortex inner tube. Two raw gas outlets are processed on the upper side wall of the vortex outer tube. The airflow exit directions of the two raw gas outlets are symmetrical about the central axis. There are three dust collection ports on the lower side of the raw gas outlet, and each dust collection port is equipped with a feeding leg extending to the semi-coke buffer bin. Two secondary cyc...

Embodiment 3

[0047] The stroke of the descending reaction tube 8 in this embodiment is 80m. In the oil-gas cyclone dust collector 9, four guide vanes installed obliquely are arranged on the outer wall of the lower end of the vortex inner tube, and the outlet angle of the guide vanes is 25°. The structures are exactly the same, and they all adopt the commercially available Stairmand HE high-efficiency cyclone separator. The diameter of the cylinder is 860mm, and the feeding leg extends into the semi-coke buffer bin. The feeding leg of the primary vortex dust removal unit 9-4, the secondary The distance between the feeding legs of the first-level cyclone 9-5 is 600mm, and the distance between the feeding legs of the second-level cyclone 9-5 and the third-level cyclone 9-6 is 600mm, so as to ensure that they do not cross each other. gas.

[0048] Other components and their connections are the same as those in Embodiment 1.

[0049] The pulverized coal pyrolysis method of this embodiment is ...

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Abstract

The invention relates to a down-flow gas semi-coke activated pulverized coal pyrolysis system and method. The system is characterized in that a high-temperature flue gas heat exchanger is communicated with a second L-shaped valve, a first L-shaped valve, a vertical mill and an upward heating riser; the vertical mill is communicated with a dry pulverized coal surge bin; a cyclone mixer is communicated with a high-temperature semi-coke surge bin, the high-temperature flue gas heat exchanger, the dry pulverized coal surge bin and a downer reaction pipe; the downer reaction pipe is communicated with an oil-gas cyclone dust collector; the oil-gas cyclone dust collector is communicated with a semi-coke cooler and the upward heating riser; the upward heating riser is communicated with a primary cyclone dust collector; the primary cyclone dust collector is communicated with a secondary cyclone dust collector; the secondary cyclone dust collector is communicated with a ternary cyclone dust collector; the ternary cyclone dust collector is communicated with the high-temperature flue gas heat exchanger; and the primary cyclone dust collector, the secondary cyclone dust collector and the ternary cyclone dust collector are communicated with the high-temperature semi-coke surge bin. The system and the method can be used for improving the yield of coal tar and reducing the consumption of energy, the dust collectors discharge materials smoothly, and subsequent fine dust removal is carried out stably.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a system and method for producing coal tar, semi-coke and coal gas by pyrolysis of coal gas semi-coke activated pulverized coal in a down-flow type. Background technique [0002] The graded utilization of high volatile bituminous coal and lignite is an important way of clean coal chemical industry. The coal topping device has low investment, low energy consumption, high thermal efficiency, and has broad market prospects and good economic benefits. [0003] From the pyrolysis mechanism and practice, it is proved that fast pyrolysis and fast derivation can increase the yield of coal pyrolysis coal tar. Pyrolysis of pulverized coal less than 200 mesh belongs to flash pyrolysis, with high liquid yield, good controllability of powder transport by airflow, simple process and low investment, so it is highly praised. However, due to the small particle size of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B53/04C10B49/04C10J3/48C10J3/46C10J3/84
CPCC10B49/04C10B53/04C10J3/466C10J3/485C10J3/84C10J2200/152C10J2300/0936C10J2300/0943
Inventor 王树宽杨占彪
Owner 王树宽
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