Reaction system for extraction of heated solvent of coal and reaction method

A reaction system and solvent technology, applied in the field of coal chemical industry, can solve the problems of not realizing continuous operation, the solvent cannot pass through, the filter screen is blocked, etc., and achieve the effect of ensuring efficient and continuous operation, low equipment requirements, and easy operation control.

Inactive Publication Date: 2014-03-05
HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The device realizes the continuous addition of solvent and the separation of the extraction liquid and the extraction residue, but the disadvantages include: the extraction residue needs to be taken out intermittently from the extractor, so that the device does not realize real continuous operation and the processing capacity is very large. Small; the existence of the filter in the extractor is prone to the problem that the filter is blocked by residue and the solvent cannot pass through

Method used

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  • Reaction system for extraction of heated solvent of coal and reaction method
  • Reaction system for extraction of heated solvent of coal and reaction method
  • Reaction system for extraction of heated solvent of coal and reaction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: The reaction method used for coal thermal solvent extraction adopts the following specific implementation steps.

[0044] figure 2 Coal is thermally extracted using a circumferential helical tubular reactor 19 as shown. Add 10L of 1-methylnaphthalene to 5 kg of dry coal particles with a particle size of ≤200 μm and dried at 100°C for 20 hours according to the mass-to-volume ratio of coal particles to solvent at 1:2; add the above-mentioned raw materials to the first stirring tank In 13, replace the air in the first stirred tank 13 and the circumferential spiral tubular reactor 19 with nitrogen and fill it with nitrogen to 5 MPa, keep the pressure in the tank and the tube constant within 30 minutes, and then let off the nitrogen. Then fill the first stirred tank 13 with nitrogen to 5 MPa, turn on the stirring and heating switch of the first stirred tank 13, and rapidly raise the temperature to 450° C. under stirring at a speed of 600 r / min. The heating u...

Embodiment 2

[0045] Embodiment 2: The reaction method used for coal thermal solvent extraction adopts the following specific implementation steps.

[0046] image 3 As shown, the coal is thermally extracted using horizontal reciprocating tubular reactors 22 . Add 3 kg of dry coal particles with a particle size of ≤200 μm and dried at 150°C for 1 hour, and add 18 L of industrial-grade national standard washing oil according to the mass-to-volume ratio of coal particles and solvent to 1:6, and then add it to the first stirring tank 13. Nitrogen replaces the air in the first stirred tank 13 and the horizontally reciprocating tubular reactor 22 and fills it with nitrogen to 5 MPa, keeps the pressure in the still and in the tube constant within 30 minutes, then releases the nitrogen, and then injects nitrogen into the first stirred tank 13 Fill it with nitrogen gas 1Mpa. Open the first stirring tank 13 for stirring, and the rotating speed is set at 100r / min. Turn on the heating device of the...

Embodiment 3

[0047] Embodiment 3: The reaction method used for coal thermal solvent extraction adopts the following specific implementation steps.

[0048] Figure 4 As shown, a vertically reciprocating tubular reactor 23 is used for thermal extraction of coal. Add 1kg of dry coal particles with a particle size of ≤200 μm and dried at 120°C for 10 hours, and add 12L of N-methylpyrrolidone according to the mass-to-volume ratio of coal particles to solvent 1:12. Put the above raw materials into the first stirred tank 13, replace the air in the first stirred tank 13 and the vertically reciprocating tubular reactor 23 with nitrogen and fill it with nitrogen to 5MPa, keep the pressure in the tank and the tube constant within 30min , and then let off the nitrogen. Then fill the first stirred tank 13 with nitrogen to 3Mpa; turn on the stirring and heating switch of the first stirred tank 13, rapidly raise the temperature to 200°C under stirring at a speed of 400r / min, and simultaneously open th...

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Abstract

The invention discloses a reaction system for extraction of a heated solvent of coal and a reaction method. The reaction system comprises a plurality of sets of premixing and stirring devices which are arranged to be in parallel. The outputs of the premixing and stirring devices are communicated with inlets of tubular-type reactors, and transportation of materials is achieved through a pressurized feeding device. The outlets of the tubular-type reactors are communicated with a plurality of sets of post-treatment devices which are arranged to be in parallel and used for separating the material liquid after reaction. The system can stir materials in different phases through the premixing and stirring devices, and achieves uniform contact and flow of the materials in different phases in a reaction pipe. The high efficiency and continuous operation of the system can be ensured. Through alternate operation of the plurality of sets of premixing and stirring devices and post-treatment devices, the continuous operation of operating processes can be achieved. The system has advantages of low requirements to devices, short technological process and low device cost.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, in particular to a reaction system and a reaction method for thermal solvent extraction of coal. Background technique [0002] Hot solvent extraction of coal is to dissolve the chain of coal molecules in the solvent under the action of a high-temperature solvent, so as to achieve separation from ash and obtain ash-free coal. Ashless coal can be used for direct liquefaction of coal, and can also be used as a coking binder to replace part of coking coal. For the solvothermal extraction of coal under high temperature and high pressure, the following two methods are usually adopted: one is to use an autoclave reactor, and the other is to use a flow-type extractor. Sang et al. (Sang woo Park, Cheol Hyeon Jang. BioreSource Technoiogy, 2001, 102:8205) use a high-temperature and high-pressure reactor made of 316 stainless steel, and open a discharge port at the bottom of the kettle body. After the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D11/02
Inventor 崔咏梅张兆翔赵风云张晓力刘玉敏黄世平李立业胡永其
Owner HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
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