Device for preparing refined anthracene and refined carbazole by taking anthracene oil as raw material

Abstract

The invention belongs to the technical field of a coal tar deep processing process of a metallurgy coking industry and particularly relates to a device for preparing refined anthracene and refined carbazole by taking anthracene oil as a raw material. The device is characterized by comprising a cooling and concentration system, an anthracene-enriched oil and pre-fractionation system, an anthracene rough fraction rectification system, a carbazole rough fraction rectification system, an anthracene narrow fraction washing and drying system, a carbazole narrow fraction washing and drying system and a solvent recycling system. A light fraction, an anthracene rough fraction, a carbazole rough fraction and a heavy fraction are separated from a pre-fractionation device of the anthracene-enriched oil; the anthracene rough fraction and the carbazole rough fraction are respectively refined in corresponding rectification devices to obtain an anthracene narrow fraction and a carbazole narrow fraction; the anthracene narrow fraction and the carbazole narrow fraction are washed in respective washing and drying devices to wash, separate and dry solid matters so as to obtain the refined anthracene product and the refined carbazole product. The device provided by the invention is efficient, energy-saving, low in loss and environment-friendly.

Description

technical field [0001] The invention belongs to the technical field of coal tar deep processing technology in the metallurgical coking industry, and in particular relates to a device for preparing refined anthracene and refined carbazole by using anthracene oil as a raw material. Background technique [0002] At present, the main products of anthracene oil finishing are refined anthracene and refined carbazole, and the physical separation methods mainly include solvent extraction, solvent extraction-distillation, distillation, solvent extraction-distillation-sublimation, crystallization-washing-distillation Wait. [0003] The solvent extraction method is to use the different solubility of anthracene, phenanthrene and carbazole in the solvent, and through the processes of heating washing, cooling crystallization, centrifugal filtration, etc., the easily soluble components are dissolved in the solvent, and the insoluble components are crystallized, and then each Component sep...

AI Technical Summary

Problems solved by technology

This method adopts the use of hot solvent to mix with the material in the centrifuge, the solvent loss is large, and the material and the solvent are not mixed sufficiently, resulting in unclean removal of impurities; the washing process is placed before the rectification treatment, due to the amount of material to be washed If there are too many solvents, the amount of solvent used is large, and the loss of solvent increases. In the process of solvent distillation and recovery, the processing capacity is also increased, which increases energy and power consumption. Loss, so that the content of anthracene and carbazole, which are not high in the crystals, is further reduced, thereby increasing the difficulty of distillation treatment. To make the content of anthracene and carbazole in the refined anthracene and refined carbazole fractions reach a higher level, it is necessary to The number of plates in the rectification tower increases, and the height of the tower increases, which increases equipment investment, energy and power consumption; washing before distillation, there will be a large amount of solvent remaining in the crystals, which will increase the amount of material that needs to be processed in the subsequent distillation process , which inevitably increases energy and power consumption

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