Method and system for hydroconversion of coal tar raw material

A hydrogenation conversion and coal tar technology, applied in the field of coal tar raw material hydrogenation conversion, coal tar raw material hydrogenation conversion system field, can solve the problems of long-term stable operation, coke blockage of reactor internal components, etc., to solve the problem of fixed The effect of short operation period, improved utilization rate and utilization value, and high liquid yield of bed coal tar hydrogenation unit

Active Publication Date: 2018-01-09
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] However, the method of the above prior art is easy to coke to generate coke or deposits to block the internal components of the reactor, which is also one of the main reasons why the current coal tar slurry bed hydrogenation unit cannot operate stably for a long period of time

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  • Method and system for hydroconversion of coal tar raw material
  • Method and system for hydroconversion of coal tar raw material
  • Method and system for hydroconversion of coal tar raw material

Examples

Experimental program
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Embodiment 1

[0120] Based on the total weight of the coal tar raw material, the dosage of the slurry bed catalyst is 1.5% by weight based on the active metal elements contained therein. After mixing the coal tar raw material in Table 1 with the aforementioned highly dispersed heterogeneous slurry bed catalyst, they enter the slurry bed hydrogenation reactor together with hydrogen for gentle hydrogenation treatment, and the outflow of the slurry bed hydrogenation reactor The product enters the first separation unit for gas-liquid separation, and separates water, and the separated liquid hydrocarbon product enters the first fractionation tower, and is distilled and cut into light distillate, first middle distillate, second middle distillate and heavy distillate. Taking the corresponding heavy fraction in the coal tar raw material entering the slurry bed hydrogenation reactor as a benchmark, the conversion rate of the heavy fraction in the raw material is controlled to be 52%. Wherein the fir...

Embodiment 2

[0129] Present embodiment adopts the method similar to embodiment 1 to carry out, and difference is:

[0130] Based on the total weight of the coal tar raw material, the dosage of the slurry bed catalyst is 2.0% by weight based on the active metal elements contained therein. The coal tar raw material is uniformly mixed with the aforementioned high-dispersion heterogeneous slurry-bed catalyst, and then enters the slurry-bed hydrogenation reactor together with hydrogen for mild hydrogenation treatment.

[0131] Taking the corresponding heavy fraction in the coal tar raw material entering the slurry bed hydrogenation reactor as a benchmark, the conversion rate of the heavy fraction in the slurry bed hydrogenation reactor is controlled to 65%. 60% by weight of the heavy fraction cut out by the first fractionation tower is thrown out of the device, and the rest of the heavy fraction is recycled back to the slurry bed hydrogenation reactor for further conversion.

[0132] 25% by we...

Embodiment 3

[0140] Present embodiment adopts the method similar to embodiment 1 to carry out, and difference is:

[0141] Based on the total weight of the coal tar raw material, the amount of the slurry bed catalyst is 0.3% by weight based on the active metal elements contained therein. The coal tar raw material is uniformly mixed with the aforementioned high-dispersion heterogeneous slurry-bed catalyst, and then enters the slurry-bed hydrogenation reactor together with hydrogen for mild hydrogenation treatment.

[0142] Taking the corresponding heavy fraction in the coal tar raw material entering the slurry bed hydrogenation reactor as a benchmark, the conversion rate of the heavy fraction in the slurry bed hydrogenation reactor is controlled to be 37%. Wherein the heavy fraction of 40% by weight cut out by the first fractionation tower is thrown out of the device, and the rest of the heavy fraction is recycled back to the slurry bed hydrogenation reactor for further conversion.

[0143...

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Abstract

The present invention relates to the field of coal tar processing, and discloses a method and a system for hydroconversion of a coal tar raw material. The method comprises: carrying out water removingand / or impurity removing pretreatment on coal tar raw material; in the presence of hydrogen gas and a slurry bed catalyst, carrying out mild hydrogenation treatment on the obtained material; sequentially carrying out gas-liquid separation and fractionation on the obtained material; throwing out part of the heavy distillate; recycling part of the first middle distillate and the remaining heavy distillate back to a slurry bed reactor; carrying out a hydrorefining reaction on the light distillate, the second middle distillate and the remaining first middle distillate; and sequentially carrying out gas-liquid separation and fractionation on the effluent to obtain a naphtha distillate, a diesel oil distillate, and a wax oil distillate. According to the present invention, by effectively combining the slurry bed and the fixed bed, the clean and efficient utilization of coal tar resources is achieved, such that the the yield of the liquid can be maximized, the utilization ratio and the utilization value of coal tar resources are improved, and the operation cycle of the equipment is prolonged to a certain extent.

Description

technical field [0001] The invention relates to the field of coal tar processing, in particular to a method for hydrogenation conversion of coal tar raw material and a system for hydrogenation conversion of coal tar raw material. Background technique [0002] With the sustained and rapid development of social economy, my country's demand for petroleum products is also increasing. [0003] However, petroleum is a non-renewable energy source and is facing a crisis of depletion. In contrast, China has relatively abundant coal reserves, so producing liquid fuel from coal has become a basic direction of coal processing and utilization. [0004] With the rapid growth of the international and domestic steel industry, the coking industry presents a high growth trend, the output of coal tar is increasing, and the clean processing and effective utilization of coal tar are becoming more and more important. At present, the conventional coal processing method is to cut various fraction...

Claims

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Application Information

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IPC IPC(8): C10G67/14C10G67/00
Inventor 李猛王蕴王卫平吴昊黄放
Owner CHINA PETROLEUM & CHEM CORP
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