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A kind of coal and coal tar mixed hydrogenation system and process

A technology for coal tar and process, applied in the field of coal chemical industry, can solve the problems of low hydrogenation reaction depth, large amount of coke, low yield of light oil product, etc. Effect

Active Publication Date: 2019-01-22
胜帮科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it did not select a suitable distillate oil as a hydrogen-donating solvent for catalytic hydrogenation, while heavy distillate, miscellaneous oil and coal were used as raw materials for catalytic hydrogenation, and the hydrogenation reaction depth was relatively low, resulting in light oil products The yield is low and the amount of green coke is large

Method used

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  • A kind of coal and coal tar mixed hydrogenation system and process
  • A kind of coal and coal tar mixed hydrogenation system and process
  • A kind of coal and coal tar mixed hydrogenation system and process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0098] A coal and coal tar hybrid hydrogenation system, said system comprising:

[0099] A hydrogen supply unit for supplying hydrogen, including a hydrogen supply device;

[0100] A coal supply unit for supplying raw coal, including a coal supply device;

[0101] a catalyst supply unit for supplying a hydrogenation catalyst, including a catalyst supply device;

[0102] The coal tar segmentation unit is used to divide the coal tar into the first light component, the hydrogen-donating solvent pre-liquid and the first heavy component; the boiling point of the first light component is less than 200°C, and the boiling point of the hydrogen-donating solvent pre-liquid is 200-450°C, the boiling point of the first heavy component is greater than 450°C; it includes a coal tar supply device and a first vacuum fractionation unit 1, and the first vacuum fractionation unit 1 is provided with a feed inlet, a first light component outlet, and a hydrogen supply The solvent pre-liquid outle...

Embodiment 2

[0126] The coal and coal tar mixed hydrogenation system described in Example 1 was used to prepare light oil products, and the coal and coal tar mixed hydrogenation process described in Example 1 was used to treat coal and coal tar.

[0127] The properties of the raw coal are shown in Table 1.

[0128] Table 1 Raw coal properties

[0129]

[0130] The properties of the raw coal tar used are shown in Table 2.

[0131] Table 2 Properties of Raw Coal Tar

[0132]

[0133]

[0134] The process conditions used in the mixed hydrogenation process of coal and coal tar are shown in Table 3:

[0135] Table 3 process conditions

[0136] project

value

Coal: coal tar (mass ratio)

0.5:1

Reaction temperature, °C

450-460

Reaction pressure, MPa

22

Airspeed, h -1

0.35

Hydrogen oil ratio, v / v

1000

Catalyst usage, accounted for mass wt% of coal powder

4

Cutting temperature of hydrogen donating solvent, ℃...

Embodiment 3

[0140] The coal and coal tar mixed hydrogenation system described in Example 1 was used to prepare light oil products, and the coal and coal tar mixed hydrogenation process described in Example 1 was used to treat coal and coal tar.

[0141] The properties of the raw coal and raw coal tar are the same as those of the raw coal and raw coal tar in Example 2.

[0142] The process conditions used in the mixed hydrogenation process of coal and coal tar are shown in Table 4:

[0143] Table 4 process conditions

[0144]

[0145]

[0146] Among them, the particle size of the coal powder is less than 100 μm, and the diameter of the catalyst is 50-100 μm.

[0147] The reaction was continued and stabilized for 720 hours, and the yield of light oil was determined to be 65%, indicating that the present invention can effectively carry out mixed hydrogenation of coal and coal tar to produce light oil, the process is simple and feasible, and the device is efficient and stable.

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Abstract

The invention provides a coal-coal tar mixed hydrogenation system and process. The system comprises a hydrogen gas supply unit, a coal supply unit, a catalyst supply unit, a coal tar dividing unit, a hydrogen supply solvent preparation unit, a coal-oil slurry preparation unit and a catalytic hydrogenation reaction unit, wherein the coal tar dividing unit is used for dividing coal tar into a first light component, a hydrogen supply solvent precursor solution and a first heavy component; the hydrogen supply solvent preparation unit is connected with the coal tar dividing unit and the hydrogen gas supply unit respectively; the coal-oil slurry preparation unit is connected with the coal tar dividing unit, the hydrogen supply solvent preparation unit, the catalyst supply unit and the coal supply unit respectively; and the catalytic hydrogenation reaction unit is connected with the coal-oil slurry preparation unit and the hydrogen gas supply unit respectively. According to the system and the process, provided by the invention, the hydrogenation depth can be remarkably improved and the yield of liquefied oil is increased; coke formation on walls can be effectively avoided and the total coke formation quantity is reduced; and the device can be stably operated for a long period, the gas phase yield can be effectively reduced, and the load of a feeding heating furnace is alleviated.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry and relates to a coal and coal tar mixed hydrogenation system and process. Background technique [0002] Coal is the main energy source and an important industrial raw material in my country. In recent years, the coal industry has achieved considerable development, with rapid growth in coal output and a substantial increase in productivity, which has made outstanding contributions to the healthy development of the economy and society. However, the use of coal is extensive and energy-efficient. , heavy pollution and other issues have not been fundamentally resolved, should vigorously develop coal chemical technology. Coal chemical industry is mainly divided into two categories: traditional coal chemical industry and modern coal chemical industry. Among them, coal coking, coal synthetic ammonia, and calcium carbide belong to traditional coal chemical industry, while the coal chemical i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/06
Inventor 沈和平常伟先梅涛
Owner 胜帮科技股份有限公司