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Coal liquefaction method and device

A technology of coal and liquefied products, applied in the field of coal chemical industry, can solve the problems of insufficient reaction depth, difficult to react coal, and inability to obtain conversion, etc., to achieve the effect of reducing hydrogen consumption and gas yield, and increasing conversion rate

Inactive Publication Date: 2017-08-18
CHNA ENERGY INVESTMENT CORP LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the process of converting coal into liquid products using the existing direct coal liquefaction process, the products produced include naphtha and diesel fractions with a distillation range 500°C, and some difficult-to-react coals that cannot be converted due to insufficient reaction depth

Method used

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  • Coal liquefaction method and device
  • Coal liquefaction method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0081] Coal slurry with a concentration of 45% (wt) (in which the particle size of coal powder is <150um, the catalyst is a coal-based loaded iron-based catalyst, the catalyst dosage is 1% of the weight of coal powder, and the rest is direct liquefaction and hydrogenation of coal with a certain hydrogen supply capacity oil) into the coal slurry preparation tank, the temperature of the coal slurry preparation tank is set at 80°C, the coal slurry is mixed with hydrogen after being boosted to 200bar by the high-pressure coal slurry pump 5, and enters the coal slurry preheater 97 (coal slurry preheating The reactor temperature is 400°C, the residence time is 10min), and then the reaction mixture enters the first liquefaction reaction unit 10 (the reactor temperature is 440°C, the residence time is 1h), and the outlet product of the first stage of the reactor enters the first product separation unit 20 for further Separation of gas-liquid phase products (the temperature of the high-...

Embodiment 2

[0083] Coal slurry concentration is 5% (wt), other is with embodiment 1.

Embodiment 3

[0085] Coal slurry concentration is 50% (wt), other is the same as embodiment 1.

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Abstract

The invention provides a coal liquefaction method and device. The coal liquefaction method comprises the steps as follows: first liquefaction reaction is carried out on coal slurry and hydrogen to obtain a first liquefied product, wherein the first liquefied product comprises a first gas mixture and a first heavy product and the first gas mixture comprises a first liquefied light oil and a first gas product; a first heavy product in the first liquefied product is separated and second liquefaction reaction is carried out on the first heavy product and the hydrogen to obtain a second liquefied product; and before or during the second liquefaction reaction, the method also comprises the step of adding a first hydrogenation catalyst to the first heavy product. Through the method and the device provided by the invention, the conversion rate and the oil yield of coal can be improved, and meanwhile, the hydrogen consumption and the gas yield are reduced.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and in particular relates to a coal liquefaction method and device. Background technique [0002] The existing direct coal liquefaction process is to prepare coal powder, solvent oil, catalyst, etc. into a certain concentration of coal slurry, then mix it with hydrogen, and enter the coal slurry preheater and coal liquefaction reactor successively. Under certain conditions ( The reaction temperature is 400-450°C, the reaction pressure is 10-30MPa) and the reaction is carried out successively, and the reaction products are separated in the separator to obtain gas products, liquefied oil products and solid residues respectively. [0003] In the process of converting coal into liquid products using the existing direct coal liquefaction process, the products produced include naphtha and diesel fractions with a distillation range <300°C, and liquefied heavy oil fractions with a distillation ra...

Claims

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Application Information

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IPC IPC(8): C10G1/06C10G1/08
CPCC10G1/06C10G1/08
Inventor 单贤根李克健章序文王洪学曹雪萍
Owner CHNA ENERGY INVESTMENT CORP LTD
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