Solvent extraction process for coal tar slag

Abstract

The invention provides a solvent extraction process for coal tar slag. The prior art has three methods for treating tar slag as follows: 1, the tar slag is transiently stacked in nature, and due to wind, sun or rain, tar, phenol, as well as high-content sulfur / nitride in the tar slag pollute the atmosphere and damage soil and water; 2, the tar slag is taken as brickyard fuel, but as the tar slag contains a large amount of organic carbon, a large amount of black smoke is produced during combustion, and unpleasant odor of hydrogen sulfide causes serious damage to the living environment of residents around brickyards; and 3, the tar slag is mixed with pulverized coal and used as boiler fuel of power plants, resulting in environmental pollution although the calorific value of coal is improved. The process consists of separation, extraction and distillation, and is applied to the field of coal chemical industry.

Description

Technical field: [0001] The invention relates to a solvent extraction process of coal tar residue. Background technique: [0002] At present, there are three methods of processing tar residue: [0003] 1. Short-term stacking in nature, due to wind or sun or rain, the tar and phenol in the tar residue and the high content of sulfur and nitrogen compounds will pollute the atmosphere and cause damage to soil and water. [0004] 2. As brick factory fuel, but because the tar residue contains a large amount of organic carbon, a large amount of black smoke will be emitted during combustion, and the unpleasant hydrogen sulfide smell will cause serious damage to the living environment of residents around the brick factory. [0005] 3. Combusting with pulverized coal as fuel for power plant boilers improves the calorific value of coal, but there is still the problem of polluting the environment. Invention content: [0006] The purpose of the present invention is to provide an envi...

AI Technical Summary

Problems solved by technology

[0004] 2. As fuel for brick factories, but because the tar residue contains a lot of organic carbon, a lot of black smoke will be emitted when burning, and the unpleasant hydrogen sulfide smell will cause serious damage to the living environment of residents around the brick factory

[0005] 3. Blending with pulverized coal as fuel for power plant boilers improves the calorific value of coal, but there are still problems of environmental pollution