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High solid content coal tar suspended bed hydrogenation system and technology

A technology of coal tar and suspended bed, applied in the field of coal chemical industry, can solve problems such as troublesome recovery and recycling of high-efficiency homogeneous catalysts, waste of resources, and increased investment in equipment

Active Publication Date: 2017-05-10
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

[0005] Although the existing technology has been able to solve the technical problems in the process of coal tar hydrogenation to a large extent, there are still some problems in the hydrogenation and upgrading of coal tar. For oil products with solid content, for solid coal tar, the raw material oil needs to be removed before entering the reaction system, which not only increases equipment investment but also wastes resources; coking on the reactor wall seriously affects the stability and continuous operation of the system; high efficiency and uniformity The recovery and recycling of phase catalysts is troublesome

Method used

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  • High solid content coal tar suspended bed hydrogenation system and technology
  • High solid content coal tar suspended bed hydrogenation system and technology
  • High solid content coal tar suspended bed hydrogenation system and technology

Examples

Experimental program
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Effect test

Embodiment 1

[0090] A coal tar suspended bed hydrogenation system, the system comprising:

[0091] A hydrogen supply unit for supplying hydrogen, including a hydrogen supply device;

[0092] Catalyst supply unit for supplying hydrogenation catalyst, including catalyst supply device;

[0093] The coal tar splitting unit is used to split the coal tar into a first light component, a hydrogen supply solvent precursor and a first heavy component; the boiling point of the first light component is less than 200°C, and the hydrogen supply solvent precursor has a boiling point of 200-450℃, the boiling point of the first heavy component is greater than 450℃; including the coal tar supply device and the first vacuum fractionation device 1, the first vacuum fractionation device 1 is provided with a feed inlet, a first light component outlet, and hydrogen supply The solvent front liquid outlet and the first heavy component outlet, and the outlet of the coal tar supply device is connected to the inlet of the ...

Embodiment 2

[0116] The coal tar suspension bed hydrogenation system and process described in Example 1 are used to prepare light oil products.

[0117] The properties of the raw coal tar are shown in Table 1.

[0118] Table 1 Properties of coal tar with high solid content

[0119] project Value Density (50℃), kg.m -3

1120 Kinematic viscosity (50℃), mm 2 / s

100.45 Moisture, wt%3 Solid impurities, wt%10 Element composition, wt%: C84.2 H7.8 O6.9 N0.8 S0.3

[0120] The process conditions used in the coal tar suspension bed hydrogenation process are shown in Table 2:

[0121] Table 2 Process conditions

[0122]

[0123]

[0124] The diameter of the catalyst is 10-50μm. The reaction temperature of the catalytic hydrogenation of the precursor liquid of the hydrogen supply solvent is 320-340°C and the pressure is 13MPa.

[0125] The reaction continued and stably proceeded for 720 hours, and the light oil yield was 75% determined by analysis, indicating that the invention can effectively carry out ...

Embodiment 3

[0127] The coal tar suspension bed hydrogenation system and process described in Example 1 are used to prepare light oil products.

[0128] The properties of the high solid content coal tar are the same as those of the raw material coal tar in Example 2.

[0129] The process conditions used in the coal tar suspension bed hydrogenation process are shown in Table 3:

[0130] Table 3 Process conditions

[0131] project Value Mass ratio of hydrogen supply solvent, first heavy component and catalyst 0.5:1:0.01 Reaction temperature, ℃320-380 Reaction pressure, MPa10 Airspeed, h -1

0.2 Hydrogen to oil ratio, v / v500 Cutting temperature of hydrogen supply solvent, ℃200-450 Cutting temperature of the first light component, ℃ Cutting temperature of the first heavy component, ℃ >450

[0132] Among them, the diameter of the catalyst is 50-100 μm. The reaction temperature for the catalytic hydrogenation of the precursor liquid of the hydrogen supply solvent is 300-330°C and the pressur...

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Abstract

The invention provides a high solid content coal tar suspended bed hydrogenation system and a high solid content coal tar suspended bed hydrogenation technology. The system comprises a hydrogen supply unit; a catalyst supply unit; a coal tar segmentation unit used for segmenting high solid content coal tar into a first light component, hydrogen-donor solvent pre-solution and a first heavy component; a hydrogen-donor solvent production unit connected with the coal tar segmentation unit and the hydrogen supply unit respectively; and a catalytic hydrogenation reaction unit connected with the coal tar segmentation unit, the hydrogen-donor solvent production unit and the catalyst supply unit respectively. According to the system and the technology provided by the invention, hydrogenation depth can be significantly improved, liquefied oil productivity is increased, wall-phase coke can be effectively avoided, total quantity of coke is reduced, long-term and stable operation of the device is achieved, and gas-phase productivity can be effectively reduced and the load of a feeding heating furnace is reduced.

Description

Technical field [0001] The invention belongs to the technical field of coal chemical industry, and relates to a coal tar suspended bed hydrogenation system and process, in particular to a high solid content coal tar suspended bed hydrogenation system and process. Background technique [0002] Coal tar is a by-product of coal pyrolysis to produce coke, and it occupies a certain share in coal production. Based on current coal pyrolysis technology, coal tar production accounts for about 3% to 5% (relative to coke production). In recent years, the use of coal tar to produce vehicle fuel has gradually increased. Substituting coal for fuel is not only a way to solve the problem of vehicle fuel shortage, but also in line with the characteristics of China's energy structure. [0003] Coal tar has a complex composition, high content of fused ring aromatics, ash, gum and asphaltenes, and contains heteroatomic substances such as nitrogen and sulfur. Direct use as fuel not only reduces the val...

Claims

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Application Information

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IPC IPC(8): C10G67/02
CPCC10G67/02C10G2400/02C10G2400/04
Inventor 沈和平常伟先梅涛
Owner 胜帮科技股份有限公司
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