Light oil and wide fraction separation technology and equipment applicable to tar distillation

Abstract

The invention provides a light oil and wide fraction separation technology and equipment applicable to tar distillation. The equipment comprises a quench tower, an ammonia water tank, a distillation tower, an oil and water separation tank and a condenser cooler, wherein the quench tower is connected with a feeding port of the distillation tower; an ammonia water outlet of the distillation tower is connected with the ammonia water tank which is connected with the quench tower through an ammonia water pump; a light fraction escape port in the top of the distillation tower is connected with the condenser cooler; the condenser cooler is connected with the oil and water separation tank which is connected with a reflux port of the distillation tower through a light oil reflux pump. Compared with the prior art, the technology and the equipment have beneficial effects as follows: 1), condensing cooling load of the top of a rectifying tower is greatly reduced, and a reflux ratio of the top of the rectifying tower is reduced; 2), heavy components capable of being separated out through cooling are firstly guided into an oil and water separation region at the lower part of the tower through quenching, so that unnecessary circulation of materials in the equipment is reduced; 3), the diameter of the rectifying tower is reduced.

Description

technical field [0001] The invention relates to the field of coal tar processing, in particular to a separation process and equipment for light oil and wide fraction suitable for tar distillation. Background technique [0002] Tar is a liquid product produced during the dry distillation and gasification of coal. It is a dark brown viscous liquid with a pungent smell. It is a raw material for the production of a series of aromatic hydrocarbons, industrial oil and electrode pitch. Tar is a highly aromatic complex mixture of various organic compounds. Tar distillation is a conventional method of dividing tar fractions under industrial conditions. It usually consists of a complete set of chemical unit operations such as heating, evaporation, fractionation, and condensation cooling. According to the differences in products and auxiliary media provided by various production enterprises, there are a variety of technically reliable distillation process routes to choose from, and p...

AI Technical Summary

Problems solved by technology

In the second distillation column 17, due to the relatively high temperature of the gas phase entering the column, a large amount of reflux liquid is required at the top of the column to reflux and cool down, resulting in a heavy burden of condensation and cooling for the system, large gas volume and large column diameter

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