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Method and system for producing modified pitch and carbon black oil from coal tar

A technology for modifying asphalt and carbon black oil, applied in the field of coal tar distillation, which can solve the problems of high fuel energy consumption and high cost, and achieve the effects of reducing cost, improving quality and reducing use

Pending Publication Date: 2022-02-08
宝钢化工湛江有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent generates medium-temperature asphalt through tar distillation, and then produces modified asphalt through a modified asphalt production process. During the production of medium-temperature asphalt, tar is distilled to produce soft asphalt, which is pretreated to produce medium-temperature asphalt, and then modified. Heat, consumes more fuel energy, high cost

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  • Method and system for producing modified pitch and carbon black oil from coal tar
  • Method and system for producing modified pitch and carbon black oil from coal tar

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Embodiment 1

[0032] Such as figure 1 As shown, a kind of coal tar production method of modified pitch and carbon black oil of the preferred embodiment of the embodiments of the present invention comprises the following steps:

[0033] S1, sending the dehydrated tar into the distillation main tower for distillation;

[0034] S2. When the output of light oil fraction is stable, anthracene oil is produced in the side line;

[0035] S3. The bottom of the distillation main tower is to generate soft asphalt, and a part of the material at the bottom of the distillation main tower is taken out and sent to a modified pretreatment tower for asphalt modification;

[0036] S4. During the reaction process of the reforming pretreatment tower, anthracene oil is extracted from the side line of the material at the bottom of the distillation main tower;

[0037] S5, the anthracene oil produced in step S4 and the anthracene oil produced in step S4 are mixed with another part of the material extracted from ...

Embodiment 2

[0042] The difference between this embodiment and Embodiment 1 is that, on the basis of Embodiment 1, step S1 is further described in this embodiment.

[0043] In this embodiment, in step S1, the dehydrated tar is subjected to vacuum distillation in the distillation main column. Vacuum distillation is used to make the internal environment of the distillation main tower a negative pressure, which can reduce the boiling point of the material in the distillation main tower, so that the material can reach a higher temperature while consuming equal fuel energy, and precipitate light oil fractions. The consumption of fuel and energy is reduced, and the cost is reduced. In addition, since the distillation main tower is operated under negative pressure, the distillation temperature is reduced, and the coking of the tube furnace is reduced; and the decompression operation can improve the operating environment and is beneficial to environmental protection.

[0044] Specifically, when th...

Embodiment 3

[0047] The difference between this embodiment and Embodiment 2 is that, on the basis of Embodiment 2, this embodiment further describes step S1.

[0048] In step S1 of this embodiment, the raw tar is sent to the dehydration tower for dehydration and preheating to generate dehydrated tar. During the process of dehydration and preheating of the raw tar in the dehydration tower, light oil fractions are extracted from the side line of the dehydration tower. The raw tar becomes dehydrated tar after heat treatment. During the heat treatment, the raw tar will heat up to remove water and light oil fractions. The light oil fractions extracted from the side line can reduce the light components in the dehydrated tar entering the distillation main tower, making the dehydrated tar The softening point of the dehydrated tar is lowered, which makes it easier to heat up after the dehydrated tar enters the distillation main tower, which can reduce the fuel energy consumed.

[0049] The other st...

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Abstract

The invention relates to the technical field of coal tar distillation, and discloses a method for producing modified pitch and carbon black oil from coal tar, the method comprises the following steps: S1, feeding dehydrated tar into a distillation main tower for distillation; s2, when the output of the light oil fraction is stable, extracting anthracene oil from a side line; s3, when maltha is generated at the tower bottom of the main distillation tower, pumping out a part of materials at the tower bottom of the main distillation tower, and feeding the materials into a modification pretreatment tower for modifying asphalt; s4, in the reaction process of the material at the bottom of the distillation main tower in the modification pretreatment tower, extracting anthracene oil from the side line; s5, mixing the anthracene oil extracted in the step S4 and the other part of materials extracted from the bottom of the distillation main tower to generate carbon black oil; and S6, reacting the material at the bottom of the distillation main tower through a modification pretreatment tower to generate medium-temperature pitch, and feeding the medium-temperature pitch generated by the modification pretreatment tower into a modification tower for flash evaporation. The use of fuel energy can be reduced, and the cost is reduced. In addition, the invention also provides a system for realizing the method.

Description

technical field [0001] The invention relates to the technical field of coal tar distillation, in particular to a method and system for producing modified pitch and carbon black oil from coal tar. Background technique [0002] Coal tar is directly condensed and recovered from coking gas, and its yield accounts for about 3-4% of coking dry coal. Its composition is extremely complex, containing tens of thousands of substances, and more than 500 substances have been identified. There are more than 200 kinds of processed products, among which bitumen accounts for more than half of the coal tar content. The production of pitch from coal tar is generally carried out through a tar distillation process. Among them, soft pitch, also known as carbon black oil, is often used to produce high value-added products such as impregnating pitch, needle coke, mesophase pitch, and carbon fiber; modified pitch, as the main downstream product of coal tar pitch, is used in the electrolytic aluminu...

Claims

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Application Information

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IPC IPC(8): C10G7/00
CPCC10G7/00
Inventor 余建帅赵龙陈水旺郝永强华权章陈俊杰柳叶青郑日云李土新
Owner 宝钢化工湛江有限公司
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