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Production method of high-quality impregnated asphalt

A production method and high-quality technology, applied in the field of coal chemical industry, can solve the problems of complex process and high energy consumption

Active Publication Date: 2021-05-11
BAOWU CHARCOAL MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the need to use mixed solvents and carry out secondary distillation on the light phase (containing solvent), the process is complicated and the energy consumption is high

Method used

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  • Production method of high-quality impregnated asphalt
  • Production method of high-quality impregnated asphalt
  • Production method of high-quality impregnated asphalt

Examples

Experimental program
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Embodiment Construction

[0027] 1. Set the flow rate to 1~5m 3 / h and tar with a QI content of 0.5-2.0% are extracted from the raw material tank, sent to the first-stage heat exchanger, and exchanged heat with the tar at the outlet of the disc centrifuge to 90-120°C, and then exchanged heat with steam through the second-stage heat exchanger to 95~180℃, make it reach viscosity 2~30mPa.S, density 1.05~1.13g / cm 3 , so that the sliding drum chassis can be normally closed by water pressure and spring action;

[0028] 2. When the outlet temperature of the tar secondary heat exchange does not reach 95°C during the heating-up stage, cut into the underground tank through the bypass of the electric three-way valve;

[0029] 3. After the temperature of the tar secondary heat exchange outlet rises to 95°C, the electric three-way valve automatically cuts into the disc centrifuge, and the two phases are separated through the disc centrifuge. Intermittent 0.3 ~ 0.6mm;

[0030] 4. The disc centrifuge discharges sl...

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Abstract

The invention relates to the field of coal chemical industry, and particularly provides a production method of high-quality impregnated asphalt. Tar reaches a certain temperature through secondary heat exchange, so that the tar reaches low viscosity and good fluidity, the density of the tar is reduced, separation is performed through a disc centrifuge with a high separation factor, and slag phase has good fluidity and is prevented from blocking a disc and a slag cavity due to the setting of regular slag discharge and intermittent slag discharge of the centrifuge. The centrifugally purified tar is distilled, and parameters are properly controlled, so that the requirements for softening point, toluene insoluble, quinoline insoluble, coking value, ash content and the like of the high-quality impregnated asphalt are met.

Description

technical field [0001] The invention relates to the field of coal chemical industry, in particular to a production method of high-quality impregnated asphalt. Background technique [0002] The impurities represented by primary QI in coal tar will seriously hinder the production of high-quality and high value-added coal tar pitch products, such as impregnating agent pitch, needle coke, mesophase pitch, pitch-based carbon fiber and spherical activated carbon, etc. tar or coal tar pitch for purification. QI particles are very small, with an average particle size of about 1 μm, so it is difficult to remove. The disclosed purification methods mainly include: static sedimentation, filtration, centrifugation, solvent method, and vacuum distillation. Among them, the solvent method is divided into solvent-sedimentation method, solvent-centrifugation method, solvent-filtration method, solvent-flocculation method, solvent-extraction method, etc. Among them: (1) The static sedimentat...

Claims

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Application Information

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IPC IPC(8): C10C1/00C10C1/04C10C1/16
CPCC10C1/00C10C1/04C10C1/16
Inventor 杜亚平陈年连苏绕宁张子昂
Owner BAOWU CHARCOAL MATERIAL TECH CO LTD
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