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Elution tower and method for eluting full-fraction coal tar by using elution tower

A technology of elution tower and coal tar, which is applied in the field of elution tower, can solve problems such as inadaptability to dehydration of coal tar, instability of viscous properties, and influence on normal operation of the tower, so as to avoid sticking and coking, good Economic benefits, the effect of avoiding the phenomenon of tower flushing

Active Publication Date: 2020-06-26
深圳前海新域能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because coal tar is a liquid with extremely high viscosity and unstable properties, and also contains solid particles such as moisture and dust, when operating in the existing elution tower, it is very easy to produce tower flushing phenomenon (that is, a large amount of liquid is washed by gas. brought to the upper part), and it is easy to produce dead corners, and carbonization and coking occurs at the dead corners to affect the normal operation of the tower. Therefore, the existing elution towers are not suitable for dehydration of coal tar, dissolved oxygen, and low-boiling phenolic compounds (i.e. "three Stripping operation

Method used

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  • Elution tower and method for eluting full-fraction coal tar by using elution tower
  • Elution tower and method for eluting full-fraction coal tar by using elution tower
  • Elution tower and method for eluting full-fraction coal tar by using elution tower

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Effect test

Embodiment 1

[0032] Such as Figure 1-4 As shown, the present embodiment provides a schematic structural diagram of an elution tower, including a tower body 1, a liquid inlet 3 and a gas outlet 2 are provided on the top of the tower body 1, wherein the liquid inlet 3 extends to the uppermost dispersing plate in the tower In the liquid collection area; the bottom of the tower body 1 is provided with a liquid outlet 9 and a gas inlet 10; the tower body 1 is provided with 10 sets of dispersing plates, and each set of dispersing plates includes umbrella-shaped dispersing plates 5 distributed up and down And the bucket-shaped dispersion plate 8, there is a gap between the umbrella-shaped dispersion plate 5 and the side wall of the tower body 1, and the lower end of the bucket-shaped dispersion plate 8 is provided with an opening 13.

[0033] In this embodiment, the umbrella-shaped dispersing plate 5 is a right conical steel plate, installed in the center of the tower, and there are four connect...

Embodiment 2

[0040] The present embodiment provides a method for elution of full fraction coal tar using the elution tower of Embodiment 1, implemented in a coal company in Hami, Xinjiang, comprising the following steps:

[0041] (1) Heating treatment: use a heat exchanger to heat the coal tar to 170°C, and send it into the elution tower from the liquid inlet;

[0042] (2) Nitrogen is passed into the tower: feed nitrogen into the tower from the gas inlet, the amount of nitrogen feed is 1.5% of the full fraction coal tar tower charge, thereby reducing the partial pressure of each component in the full fraction coal tar, so that it evaporates at a lower boiling temperature;

[0043] (3) System vacuuming: adopt vacuum pump to vacuumize, and the vacuum degree is 0.08Mpa, so that moisture, dissolved oxygen, and low-boiling point phenolic compounds are evaporated from the tower top;

[0044] (4) Separation of distillate at the top of the tower: the distillate at the top of the tower enters the ...

Embodiment 3

[0049] The present embodiment provides a method for elution of full-fraction coal tar using the elution tower of Embodiment 1, which is implemented in B Coal Enterprise in Hami, Xinjiang, including the following steps:

[0050] (1) Heating treatment: use a heat exchanger to heat the coal tar to 200°C, and send it into the elution tower from the liquid inlet;

[0051] (2) pass into nitrogen in the tower: pass into nitrogen in the tower from gas inlet, nitrogen feed rate is the 2.0% of full cut coal tar tower feed, thereby reduces the partial pressure of each component in the full cut coal tar, so that It distills off at a lower boiling temperature;

[0052] (3) System vacuuming: adopt vacuum pump to vacuumize, and the vacuum degree is 0.085Mpa, so that moisture, dissolved oxygen, and low-boiling point phenolic compounds are evaporated from the tower top;

[0053] (4) Separation of distillate at the top of the tower: the distillate at the top of the tower enters the cooler from...

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Abstract

The invention provides an elution tower and an elution method thereof for full-range coal tar, the elution tower comprises a tower body, the top of the tower body is provided with a liquid inlet and agas outlet, and the bottom of the tower body is provided with a liquid outlet and a gas inlet; wherein a plurality of groups of dispersion plates are arranged in the tower body, each group of dispersion plates comprises an umbrella-shaped dispersion plate and a bucket-shaped dispersion plate which are distributed up and down, a gap is formed between the umbrella-shaped dispersion plate and the side wall of the tower body, and an opening is formed in the lower end of the bucket-shaped dispersion plate. The method for eluting the full-range coal tar by adopting the elution tower comprises the following steps: heating the full-range coal tar to 130-240 DEG C and then feeding the full-range coal tar into the elution tower; introducing nitrogen into the tower, and vacuumizing the elution towerby using vacuumizing equipment; cooling the tower top distillate to below 40 DEG C; cooling the distillate at the top of the elution tower, and then enabling the distillate to enter a separation tankfor oil, water and gas separation; and sending the coal tar removed from the bottom of the elution tower to the next process.

Description

technical field [0001] The invention relates to the technical field of elution towers, in particular to an elution tower and a method for elution of full fraction coal tar. Background technique [0002] All kinds of coal tar contain impurities that cause harm or have adverse effects on production equipment, especially hydrogenation production equipment, hydrogenation catalysts and product quality. These impurities are mainly water (1.5-4.5%), metals (100-400mg / kg) and solid impurities (2-5%). The water in the coal tar can cause fluctuations in the operating temperature of the heating furnace, increase energy consumption, and cause pressure changes in the equipment after the water vaporizes. The water vapor will age the catalyst and reduce its activity or pulverize it, blocking the hydrogenation reactor. The metals contained in coal tar are mainly sodium, calcium, magnesium, iron, etc. These metals will not only cause harm to hydrogenation production equipment and pipelines,...

Claims

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Application Information

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IPC IPC(8): C10C1/18C10C1/19C10C1/02C10C1/06
CPCC10C1/02C10C1/06C10C1/18C10C1/19
Inventor 李志英何宏鹰张军黄亚松房广信
Owner 深圳前海新域能源科技有限公司