A kind of coal tar waste residue extraction and separation method

A separation method, coal tar technology, applied in the direction of tar processing through selective solvent extraction, solid waste removal, etc., can solve the problems of high toxicity of extraction solvent, high boiling range, large recovery energy consumption, etc., to reduce the secondary environment The risk of pollution, the effect of simple process and low operating cost

Active Publication Date: 2017-10-27
太原市金浦顺化工有限公司
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  • Abstract
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Problems solved by technology

The disadvantage of this method is that the extractant used is anthracene oil, and its main components are highly toxic polycyclic aromatic hydrocarbons such as anthracene, phenanthrene, fluorene, acenaphthene, and carbazole, which are highly irritating and have a high boiling range. 280~360℃, if the anthracene oil is recovered, it will consume a lot of energy
[0007] In the above-mentioned prior art, the extractants used for extraction and separation of coal tar waste residues generally have high toxicity and / or high boiling point of the extraction solvent, large recovery energy consumption and / or high cost

Method used

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  • A kind of coal tar waste residue extraction and separation method
  • A kind of coal tar waste residue extraction and separation method

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Experimental program
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Effect test

Embodiment 1

[0036] Under normal temperature and pressure, furfural and methyl acetate are formulated into a furfural ester composite extractant according to the volume percentage of 5% and 95%, and then the composite extractant is mixed with the coal tar waste residue J1 produced by the coking plant according to the mass ratio of 1:1 mixed in the extraction tank to obtain the mixture; under the condition of normal temperature and pressure, the above mixture was fully stirred for 0.5h, left standing for 0.5h, and then sent to the separation equipment for separation to obtain the mixed solution and solid residue; The separated mixed solution is placed in a distillation tank, heated to boiling and separated by distillation to obtain a composite extractant and tar, the composite extractant is recycled, and the tar is sent to a tar storage tank; the solid residue obtained by separation is again mixed with a composite extractant or The composite extraction agent recovered in the above steps is s...

Embodiment 2

[0038] Under normal temperature and pressure, furfural and ethyl acetate are formulated into a furfural ester composite extractant according to the volume percentage of 12% and 88%, and then the composite extractant and the coal tar waste residue J2 produced by the coking plant are prepared according to the mass ratio of Mix 2:1 in the extraction tank to obtain the mixture; under the condition of normal temperature and pressure, fully stir the above mixture for 40min, let it stand for 0.5h, and then send it to the separation equipment for separation to obtain the mixed solution and solid slag; the separation The obtained mixed solution is placed in a distillation tank, heated to boiling and separated by distillation to obtain a composite extractant and tar, the composite extractant is recycled, and the tar is sent to a tar storage tank; The composite extraction agent recovered in the step is subjected to secondary washing and separation to obtain a mixed solution and solid resi...

Embodiment 3

[0040]Under normal temperature and pressure, furfural, ethyl acetate and methyl acetate were formulated into furfural ester composite extractant according to the volume percentage of 12%, 58%, and 30%, and then the composite extractant was mixed with the coal gasification process. Coal tar waste residue Q1 is mixed in the extraction tank according to the mass ratio of 2.5:1 to obtain the mixture; under the condition of normal temperature and pressure, the above mixture is fully stirred for 50 minutes, allowed to stand for 1 hour, and then sent to the separation device for separation to obtain the mixture Solution and solid slag; the separated mixed solution is placed in a distillation tank, heated to boiling and separated by distillation to obtain a composite extractant and tar, the composite extractant is recycled, and the tar is sent to a tar storage tank; the solid slag obtained by separation, The composite extractant or the composite extractant recovered in the above steps ...

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Abstract

The invention relates to a method for extracting and separating coal tar waste residue. The purpose of the present invention is to solve the technical problems existing in the existing method of solvent extraction and separation of coal tar waste residue, which easily cause secondary environmental pollution, expensive extraction agent, high operating cost and complicated process. The technical solution adopted in the present invention is, under normal temperature and pressure, using a composite extractant composed of furfural and ester solvents, through the steps of extraction, separation, distillation and washing, the tar, coal powder, and coke in the coal tar waste residue are extracted. In the process of extraction, the amount of the composite extractant used is 1 to 3 times the mass of the coal tar waste residue. The composition of the composite extractant of the invention is cheap and easy to obtain, all of which have low toxicity and high separation efficiency. The whole extraction and separation operation process is carried out under normal temperature and pressure conditions, the process is simple, and the energy consumption and operation cost are low.

Description

technical field [0001] The present invention relates to an extraction and separation method of coal tar waste residue, in particular to a composite extractant composed of furfural and ester solvents at normal temperature and pressure, and through the steps of extraction, separation, distillation and washing, the coal tar residue is extracted A coal tar waste residue extraction and separation method for separating tar from solid residues such as coal powder and coke powder. Background technique [0002] Coal tar waste residue is an industrial waste residue formed when high-boiling organic compounds generated under high-temperature conditions are condensed and mixed with coal powder and solid particles entrained in the gas during the gasification and coking process of coal. Coal tar waste residue contains a large amount of fixed carbon and organic volatile matter, and its calorific value is about 8000kcal / kg, which is a useful secondary energy source. However, at present, mos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/18B09B3/00B09B5/00
Inventor 牛艳霞刘彦荣王雄雷张建文申峻盛清涛刘刚
Owner 太原市金浦顺化工有限公司
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