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 medi

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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

Examples

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Example Embodiment

[0031] Example one

[0032] like figure 1 , The method of producing coal tar oils and carbon black modified bitumen according to a preferred embodiment of the present invention embodiment, comprising the steps of:

[0033] S1, dehydrated tar fed to a distillation column for distilling the main;

[0034] S2, gas oil fraction to be output stability, anthracene oil side draw;

[0035] S3, the main column bottoms to be distilled generate soft bitumen, the main distillation column bottom part of the material extracted into the modified bitumen modified pre-column;

[0036] S4, the main distillation column bottom material in the process of reforming the pre-column reactor, anthracene oil side draw;

[0037] S5, the recovery of step S4 and step S4 anthracene oil recovery anthracene oil mixed with another part of the material extracted from the bottom of the distillation column of the primary generating carbon black oils;

[0038] S6, the main distillation column bottom of column material...

Example Embodiment

[0041] Example 2

[0042] The difference from the embodiment is in that, on, in the first embodiment, the present embodiment will further explain the step S1.

[0043] In the step S1, the dehydrated tar is subjected to pressure reduction in the distillation main tower. Using reduced pressure distillation, the inner environment of the distillation main tower is negative pressure, and the boiling point of the material in the distillation main tower can be reduced, so that the material can reach a higher temperature in the case of consuming equal fuel energy, precipitated light oil fraction, Reduce the consumption of fuel energy, reduce costs, in addition, due to the negative pressure operation in the distillation main tower, the distillation temperature is reduced, and the tube furnace is focused; and the decompression operation can improve the operating environment, which is conducive to environmental protection.

[0044] Specifically, when the first batch of dehydrated tar enters ...

Example Embodiment

[0046] Example three

[0047] The difference between the present embodiment and the second embodiment is that, on the basis of the second embodiment, the present embodiment will further explain the step S1.

[0048] In the step S1 of the present embodiment, the raw material tar is fed into the dehydrated column for dehydration and preheating to form a dehydrated tar, the raw material tar is dehydrated in the dehydrated column, and the light oil fraction is obtained from the side of the dewatering tower. The raw material tar turns into a dehydrated tar by heat treatment. When heat treatment, the raw material tar will heat, take off moisture and light oil fraction, and the sideways remove the light oil fraction to reduce the dehydrated tar of the distillation main tower to reduce the moisture, so that the moisture coke The softening point is lowered, thereby making the dehydrated tar after entering the distillation main tower, which is easier to heat up, which can reduce the consump...

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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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