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Coal tar dehydration method and coal tar dehydration device

A dehydration device and a technology for coal tar, applied in the field of coal tar dehydration, can solve the problem of high moisture content of coal tar, and achieve the effects of low separation energy consumption, mild operating conditions and environmental friendliness

Active Publication Date: 2016-07-20
ZHENGZHOU SIWEI SPECIAL MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the moisture content in the coal tar obtained by this method is still high, only reaching a level lower than 0.8%

Method used

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  • Coal tar dehydration method and coal tar dehydration device

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the coal tar dehydration device of the present invention comprises a settling tank 1, a preheating furnace 2, a membrane separation device 4, a condenser 6, and a vacuum pump 7 connected in sequence, and the membrane separation device is also connected with a reflux pump 5, and the settling tank passes through The pipeline is connected to the preheating furnace, and the preheating furnace is connected to the membrane separation device through the pipeline. The membrane separation device is provided with a raw material inlet for adding crude coal tar, and a dehydrated coal tar outlet for discharging the dehydrated coal tar out of the membrane separation device. And the water vapor outlet that is used to extract the water vapor on the permeate side, the membrane separation device includes a plurality of membrane modules 3, the membrane module in this embodiment is a circular membrane tube, and the circular membrane tube includes a membrane tube s...

Embodiment 2

[0026] The difference between the coal tar dehydration device of this embodiment and the coal tar dehydration device of Embodiment 1 is that no return pump is included.

Embodiment 3

[0028] The difference between the coal tar dehydration device in this embodiment and the coal tar dehydration device in Embodiment 1 is that no condenser is included.

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Abstract

The invention relates to a coal tar dehydration method and a coal tar dehydration device, and belongs to the technical field of coal tar dehydration. The coal tar dehydration method comprises the following steps: preheating crude coal tar to be 80 to 90 DEG C, and performing membrane separation, wherein membrane separation is implemented by performing vacuumizing on the osmosis side of a separation membrane to osmose and evaporate water in the crude coal tar to the osmosis side of the separation membrane to obtain dehydrated coal tar on the osmosis residual side. According to the coal tar dehydration method, a separation process is high in separation coefficient, and has good separation effects, and the water content of the coal tar can be reduced to be 0.1 percent or lower; distillation is avoided in the separation process, so that energy consumption is greatly reduced; the method is easy to operate and lower in cost; moreover, an operating condition is mild, and introduction of a third component is avoided to achieve environment friendliness.

Description

technical field [0001] The invention relates to a coal tar dehydration method and a coal tar dehydration device, belonging to the technical field of coal tar dehydration. Background technique [0002] Coal tar is one of the crude gas products produced by the pyrolysis of coal in the coking industry. It is a black viscous liquid under normal temperature and pressure. There is a small amount of water in coal tar, which forms an emulsion of water and tar, which makes the heating of the tar uneven, and the water may suddenly boil due to overheating, causing the tar to spew out. In addition, the water may introduce corrosive impurities, causing corrosion of equipment and pipelines. The dehydrated tar can reduce the energy consumption of the distillation system, increase the production capacity of the equipment, reduce the resistance of the distillation system, improve the quality of the distillate and asphalt, and reduce the corrosion of the equipment. Coal tar dehydration techn...

Claims

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Application Information

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IPC IPC(8): C10C1/02
CPCC10C1/02
Inventor 常立玉贾进盈刘国库李朝治
Owner ZHENGZHOU SIWEI SPECIAL MATERIALS CO LTD
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