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Matching technology method for optimizing feeding of coal tar suspended bed hydrocracker

A technology for hydrocracking and coal tar, which is used in hydrotreating process, petroleum industry, processing hydrocarbon oil, etc. It can solve the problems of high solid content and high raw material harshness, so as to reduce the raw material harshness, flexibly utilize, and realize products. Diversified Effects

Active Publication Date: 2014-01-01
BEIJING PETROCHEM ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Coal tar has a high solid content, and it directly enters the suspension bed hydrogenation unit without a reasonable deslagging process, and the raw material is highly harsh

Method used

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  • Matching technology method for optimizing feeding of coal tar suspended bed hydrocracker
  • Matching technology method for optimizing feeding of coal tar suspended bed hydrocracker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] This embodiment provides a coal tar processing system, the structure of which is as follows figure 2 Shown.

[0064] The coal tar processing system includes: raw oil buffer tank 1, coal tar pump 2, first filter 3, first heat exchanger 4, dehydration tower 5, first air cooler 6, separator 7, and second heat exchange Device 8, coal tar feeding furnace 9, coal tar pressure reducing tower 10, light oil mixing tank 11, light oil pump 12, heavy oil mixing tank 13, heavy oil pump 14, second filter 15, raw material mixing tank 16, raw oil pump 17 , New hydrogen compressor 18, suspended bed reactor unit, fixed bed reactor 20, decompression tower 21, third heat exchanger 22, fixed bed thermal high-pressure separator 23, fourth heat exchanger 24, second air cooler 25. Fixed-bed cold high-pressure separator 26, circulating hydrogen compressor inlet separation tank 27, circulating hydrogen compressor 28, suspended bed reactor unit including suspended bed cracking reactor 19-1, hot hi...

Embodiment 2

[0084] This embodiment provides a coal tar processing method, which uses the coal tar processing device provided in Example 1 for processing, and includes the following steps:

[0085] The coal tar from the tank farm is fed into the raw oil buffer tank 1 at a mass flow rate of 75t / h, and then the coal tar raw material is transported to the first filter 3 by the coal tar pump 2 for filtration, and the coal is removed during the pumping process. The pressure increase of tar is 1.4MPaG;

[0086] The first filter 3 removes solid particles with a particle size ≥25μm in the coal tar, and then the coal tar enters the first heat exchanger 4, the temperature of the coal tar rises to 130°C, and enters the dehydration tower 5 to remove most of the water. The water content of coal tar at the bottom of the tower is about 0.1%. The water leaves from the top of the dehydration tower 5 and brings out a small amount of light oil. After being condensed by the first air cooler 6, it enters the separa...

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Abstract

The invention relates to a matching technology method and a treatment system for optimizing feeding of a coal tar suspended bed hydrocracker. The method comprises the following steps: filtration and deslagging of coal tar, dehydration treatment through a dehydrating tower, and deep drawing through a vacuum tower. According to the invention, light oil pumped out from the top of the vacuum tower is mixed with diesel fractions pumped out from the vacuum tower siding to be sent to a fixed bed reactor for hydrocracking treatment; the light oil pumped out from the top of the vacuum tower can also be sent to the fixed bed reactor for hydrocracking treatment, and the diesel distillate pumped out from the siding is sent to a phenol-extracting device to be used as a raw material for extracting phenolic substances; wax oil fractions pumped out from the vacuum tower siding are sent to the suspended bed hydrocracker to be used as a raw material for a hydrocracking reaction; heavy oil pumped out from the bottom of the vacuum tower is subjected to filtration, a filtrate is sent to the suspended bed hydrocracker to be used as a raw material for the hydrocracking reaction, and filter residues are sent to a granulating device for granulating. The invention also provides the treatment system, suitable for the method, of the coal tar.

Description

Technical field [0001] The invention relates to a supporting process method for optimizing the feed of a coal tar suspension bed hydrocracking device, and belongs to the technical field of coal chemical industry and petrochemical industry. Background technique [0002] Coal tar is a by-product of coal pyrolysis to make coke, and it occupies a certain share in coal production. Currently, China's annual output of tar is about 9 million tons, but the actual processing capacity is only 3 million tons. Due to the restriction of backward technology in the downstream chemical industry of coke, the huge amount of coal tar is difficult to effectively use. [0003] The traditional processing method of coal tar aims at physically separating and extracting single-component or narrow-component products, and extracting washing oil, light oil, anthracene oil, industrial naphthalene, crude phenol and inferior asphalt from coal tar. Due to the complex composition of coal tar, the low content of h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10G67/14
Inventor 刘戈范风铭
Owner BEIJING PETROCHEM ENG
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