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Coal tar full-fraction hydrogenation method for coupling slurry bed and static bed

A technology for coal tar and full distillate, applied in the field of coal chemical industry, can solve the problems of complex multi-stage hydrotreating process and high input cost

Active Publication Date: 2013-04-24
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the existing technology, this process can carry out the hydrogenation of the whole fraction of coal tar, the utilization rate of coal tar raw material is high, and at the same time, it can ensure the long-term stable operation of the device, but the multi-stage hydrogenation process is relatively complicated and the input cost is high

Method used

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  • Coal tar full-fraction hydrogenation method for coupling slurry bed and static bed
  • Coal tar full-fraction hydrogenation method for coupling slurry bed and static bed
  • Coal tar full-fraction hydrogenation method for coupling slurry bed and static bed

Examples

Experimental program
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Effect test

Embodiment 1

[0022] The whole distillate of a kind of high-temperature coal tar is used as the raw material, which is recorded as 1# raw material oil, and its properties are shown in Table 1. It is pretreated to remove water and mechanical impurities, mixed with the hydrocracking catalyst evenly into the slurry bed reactor, and hydrocracked The reaction conditions are listed in Table 3. The initial product after hydrocracking enters the fractionation tower, and the light fraction enters the rear stage fixed-bed reactor for hydrofining. This fraction accounts for about 15wt%, and about 65wt% of the middle distillate is recycled back to the slurry bed The reactor continues to hydrocrack, and about 20 wt% of the heavy fraction enters the raw material storage tank after filtering to remove part of the catalyst and coke generated during the reaction, and the recycling rate of the catalyst is about 80%. Table 3 shows the reaction conditions for fixed-bed hydrotreating of light distillates. The p...

Embodiment 2

[0024] The mixture of high-temperature coal tar phenol oil fraction and medium-temperature coal tar whole fraction oil is used as raw material oil, which is recorded as 2# raw material oil, and its properties are shown in Table 1. Pretreatment removes water and mechanical impurities, and the raw material is mixed with hydrocracking catalyst Evenly enter the slurry bed reactor, the hydrocracking reaction conditions are listed in Table 3, the primary product after hydrocracking enters the fractionation tower, and the light fraction enters the rear stage fixed bed reactor for hydrorefining, and this fraction accounts for about 45wt%. , about 50wt% of the middle distillate is recycled back to the slurry bed reactor to continue hydrocracking, and about 5wt% of the heavy fraction enters the raw material storage tank after filtering to remove part of the catalyst and the coke produced in the reaction process. The recycling rate of the catalyst is about 90%. The light fractions contin...

Embodiment 3

[0026] The mixture of low-temperature coal tar whole distillate oil and residual oil is used as raw material oil, recorded as 3# raw material oil, its properties are shown in Table 1, pre-treated to remove water and mechanical impurities, mixed evenly with hydrocracking catalyst and entered into slurry bed reaction The hydrocracking reaction conditions are listed in Table 3. The initial product after hydrocracking enters the fractionation tower, and the light fraction enters the rear fixed-bed reactor for hydrofining. This part of the fraction accounts for about 30wt%, and the middle distillate is about 55wt%. Circulate back to the slurry bed reactor to continue hydrocracking. About 15wt% of the heavy fraction enters the raw material storage tank after filtering to remove part of the catalyst and coke generated during the reaction. The recycling rate of the catalyst is about 85%. The hydrofining reaction conditions are listed in Table 3. The products are cut into gasoline and ...

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Abstract

The invention relates to a coal tar full-fraction hydrogenation method for coupling a slurry bed and a static bed. The coal tar full-fraction hydrogenation method mainly comprises a coal tar material pretreatment unit, a slurry bed hydrocracking unit, a primary hydrogenation product fractionation unit, a static bed hydrorefining unit, and a product distilling unit, wherein the coal tar full-fraction oil is subjected to pretreatment such as dewatering and dedusting, and enters a slurry bed reactor to carry out hydrocracking reaction after being mixed and pre-heated together with a hydrocracking catalyst; the reacted primary hydrogenation product enters the static bed hydrorefining unit through a light component obtained by fractionation; the middle fraction and the catalyst return to a slurry bed hydrogenation reactor in a circulating manner; a light component returns to a tar pretreatment unit to hydrogenate in circulation after removing a part of catalyst and coke generated in a cracking manner, and the light component is rectified to obtain naphtha and diesel oil product after common hydrorefining. The method is coal tar full-fraction hydrogenation; the utilization rate of the coal tar is improved to the maximal extent; and the coking of the heavy component of the coal tar and inactivation of the catalyst are effectively delayed by the process for coupling the slurry bed and the static bed, and the production cycle is also prolonged.

Description

technical field [0001] The invention belongs to the field of coal chemical industry, and relates to a slurry bed and fixed bed coupling method for hydrogenation of full fractions of coal tar, in particular to produce gasoline and diesel by using the slurry bed and fixed bed coupling hydrogenation method using the whole fractions of coal tar as raw materials . Background technique [0002] Coal tar is one of the main products of coal thermal processing and is a multi-component mixture. According to different coal thermal processing techniques, the obtained coal tar is usually divided into low-temperature, medium-temperature and high-temperature coal tar. In recent years, with the depletion of petroleum resources, coal tar hydrogenation to prepare clean fuel oil has attracted much attention as a petrochemical alternative product, and significant progress has been made in the development of coal tar hydrogenation technology. At present, coal tar hydrogenation technology can b...

Claims

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Application Information

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IPC IPC(8): C10G67/00
Inventor 李春山王红岩阚涛曹益民孙晓艳张锁江
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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