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A kind of lightening method of whole distillate fraction of coal tar

A full-distillate, coal tar technology, applied in the field of coal chemical industry, can solve the problems of unreasonable diesel-gasoline ratio, short operation period and high energy consumption

Active Publication Date: 2018-08-28
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to overcome the above-mentioned defects of the prior art, to maximize the conversion of the full fraction feed of coal tar into light fuels such as clean gasoline and diesel oil, and to avoid high energy consumption, short operation period, and low diesel-gasoline ratio in the existing process. The occurrence of reasonable and other issues

Method used

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  • A kind of lightening method of whole distillate fraction of coal tar
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  • A kind of lightening method of whole distillate fraction of coal tar

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Embodiment 1

[0077] The structure of the two-stage slurry bed reactor of the present embodiment is as follows figure 2 As shown in , the specific operation method is as described in the above-mentioned preferred embodiment of the present invention.

[0078] In this embodiment, the length of the sleeve is 3 / 5 of the length of the inner chamber of the two-stage slurry bed reactor; The length of the inside of the sleeve is 200 mm, the length of the underflow pipe is 100 mm, and the ratio of the length of the inner cavity of the slurry bed reactor to the inner diameter of the inner cavity of the slurry bed reactor is 10:1. The hydrocyclones are set in two stages, and the volumes of the two-stage hydrocyclones are the same, and the ratio of the volume of each hydrocyclone to the volume of the inner cavity of the slurry bed reactor is 1:800.

[0079] The flow rate of hydrogen is controlled so that the average velocity of the reaction materials in the inner cavity of the secondary slurry bed re...

Embodiment 2-4

[0094] Embodiment 2-4 adopts the technical process identical with embodiment 1 to carry out, and difference is that process condition is different, specifically, the relevant reaction conditions and the result in the one-stage slurry bed reactor of embodiment 2-4 are as table Shown in 2; Relevant reaction conditions and results in the two-stage slurry bed reactor are as shown in Table 3; Relevant reaction conditions and results of the fixed-bed hydroprocessing unit are as shown in Table 4, and product properties are shown in Table 5 .

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Abstract

The invention relates to the field of coal chemical industry, and discloses a coal tar whole fraction lightweighting method. The method comprises the following steps: coal tar whole fraction, hydrogen and a hydrogenation catalyst I are introduced into a primary slurry bed reactor for a hydrocracking reaction to obtain a cracking reaction mixture; the cracking reaction mixture is separated to first gas, a light oil phase and a heavy oil phase; the hydrogen and the heavy oil phase are introduced into a secondary slurry bed reactor with a built-in hydrocyclone separator for a deep hydrogenation conversion reaction, and the reacted solid content ingredient and the light oil phase are introduced into a fixed bed hydrotreatment unit for hydrotreatment. According to the invention, a two-stage combined-type treatment and a fixed bed hydrocracking coupled technology flow are employed, on the based of running period guarantee, the coal tar whole fraction is directly charged, whole plant distillate oil yield is increased, and a purpose of producing a cleaning fuel with maximum degree is achieved.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a method for lightening the whole fraction of coal tar. Background technique [0002] Coal tar is a black or dark brown, viscous liquid product with a pungent smell, which is by-produced during the carbonization and / or gasification process of coal. According to the process reaction temperature, it can be divided into low-temperature coal tar (450-650°C), medium-temperature coal tar (600-1000°C) and high-temperature coal tar (greater than 1000°C). Overall, the annual output of coal tar in my country has exceeded 20 million tons. In 2011, the total production capacity of high-temperature coal tar in my country was about 22 million tons, and the actual output was about 17.5 million tons; the total production capacity of medium-low temperature coal tar was about 6 million tons, and the total output reached 3.5 million tons. In addition, a large number of coal-to-natural gas in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G67/02
CPCC10G67/02C10G2300/202C10G2300/205C10G2400/02C10G2400/04
Inventor 王蕴吴治国王卫平王鹏飞崔龙鹏汪燮卿
Owner CHINA PETROLEUM & CHEM CORP
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