Coal tar deslagging and fraction separation process and device

A separation device and a technology for coal tar, applied in the field of coal chemical industry, can solve the problems of complicated operation, time-consuming, and various waste water generation, etc., and achieve the effects of easy industrialization, simple structure and low cost

Active Publication Date: 2019-06-04
NORTHWEST UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The process is complex in operation, low in slag removal efficiency, and high in energy consumption, making it difficult to expand production scale
[0006] Chinese patent CN105316018A describes a coal tar deep-processing pretreatment method. The present invention uses centrifugal separation, gas backwash filtration, distillation, and high-voltage electric field to respectively deslagging, deammonia, dephenol, and desalination of coal tar, which is suitable for medium and low temperature or Pretreatment of high-temperature coal tar, but the process has low separation efficiency, complicated operation and high energy consumption
Although the fractionation device can know the operation status of the equipment in time, the structure is too complicated and the operation is cumbersome, which is not conducive to large-scale production
[0009] To sum up, the traditional coal tar deslagging and fraction separation process not only consumes a lot of energy, produces various waste water, and causes a certain degree of pollution to the environment, but also has low separation efficiency, incomplete separation, complex operation, and time-consuming

Method used

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  • Coal tar deslagging and fraction separation process and device
  • Coal tar deslagging and fraction separation process and device
  • Coal tar deslagging and fraction separation process and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Take 200g of dehydrated coal tar and add tetrahydrofuran solvent in a volume ratio of 1:1, stir evenly with a glass rod, remove the tar residue by suction filtration and centrifugation, volatilize a small amount of solvent in the filter paper and the tar residue in the centrifuge tube, and weigh it The calculated slag removal rate (relative to the amount of dehydrated coal tar) is 0.12%. Then take 200g of dehydrated coal tar and tetrahydrofuran solvent in a volume ratio of 1:1 and add it to the coal tar extraction reaction kettle of the device, carry out the test according to the above procedure, weigh the tar residue stored in the tar residue storage tank and calculate the deslagging The ratio (relative to the amount of dehydrated coal tar) was 0.3%.

[0086] To sum up, it can be seen that the deslagging of coal tar by this device is more thorough than that of laboratory deslagging, and there will be no loss due to solvent volatilization.

Embodiment 2

[0088] A certain amount of dehydrated coal tar was tested according to the aforementioned process, and the temperature of the second tubular preheater was set to 200°C and 300°C respectively. ≥200°C fraction), heavy 1 (≤200°C fraction), light 2 (≥300°C fraction), heavy 2 (≤300°C fraction) each 1mL, then dissolved in 2mL of dichloromethane, and then GC-MS and TG analysis, analysis results see image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8, Figure 9 , Figure 10 And Table 2, Table 3, Table 4 and Table 5.

[0089] Take a certain amount of dehydrated coal tar into the device, after deslagging and desolventization, the deslagging coal tar is preheated to 200°C in the second tubular preheater, and cut in the decompressed state of the second decompression vaporization chamber. Fractions, light 1 (fraction ≤ 200°C) and heavy 1 (fraction ≥ 200°C) of medium and low temperature coal tar were obtained, detected by GC-MS and TG, and the analysis results were as ...

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Abstract

A coal tar deslag and fraction separation process and device, which uses a solvent to mix and extract coal tar in a coal tar extraction reactor, and then separates it in a solid-liquid separator to obtain tar residue and solvent extracts, which are flashed under reduced pressure. The steam tower and filter further deslag; the solvent extract enters the first decompression vaporization chamber and is condensed through the first condensation device to obtain the solvent and deslag coal tar, and the solvent can be recycled; the deslag coal tar enters the second decompression vaporization chamber The heavy coal tar component and the light coal tar component are obtained through condensation in the second condensation device. The object of the present invention is to provide a coal tar deslag and fraction separation process and device, which can achieve effective fractionation of coal tar components, has low process energy consumption, no waste water discharge, low equipment investment, continuous production and is easy to expand production. scale.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and relates to a coal tar deslagging and fraction separation process and device. Background technique [0002] With the rapid economic development, China has become a major energy consumer in the world. The market demand for petroleum products is increasing day by day, and the shortage of crude oil supply is becoming increasingly prominent. It is imperative to seek new alternative energy sources. China has relatively abundant coal resources and a large number of coking enterprises, which produce a large amount of coal tar by-product. Coal tar obtained from coal dry distillation and pyrolysis is a very valuable chemical raw material. Almost all carbazoles and quinolines on the market are derived from coal tar, and most of anthracene, acenaphthene and pyrene are also processed and separated from coal tar. , extracted. It can be seen that coal tar products occupy an extremely import...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C37/68
CPCC10C1/00C10C1/04C10C1/18
Inventor 孙鸣钟姣姣杨叶伟苏小平马晓迅徐龙郝青青焦林郁
Owner NORTHWEST UNIV
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