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Coal tar deep processing technology based on four mixed fractions

A technology for deep processing and coal tar, applied in the field of new high-efficiency and low-consumption tar processing technology, coal tar deep processing technology based on four mixed fractions, to achieve the effect of low investment, low energy consumption, and reasonable design of process equipment

Inactive Publication Date: 2011-08-24
上海同特化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the characteristics and deficiencies of the existing domestic and foreign tar distillation processes, the technical problem to be solved by the present invention is to provide a brand-new product that can effectively solve the concentration and yield of phenol naphthalene and asphalt processing in combination with the economic benefits of tar processing products. Coal tar deep processing technology based on four-mixed fraction based on outlet problem

Method used

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  • Coal tar deep processing technology based on four mixed fractions
  • Coal tar deep processing technology based on four mixed fractions
  • Coal tar deep processing technology based on four mixed fractions

Examples

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Embodiment 1

[0020] As shown in the accompanying drawings, in the coal tar deep processing technology based on the four-mixed fraction provided by the preferred embodiment of the present invention, the high-temperature coal tar produced by blast furnace coke production has properties shown in Table 1, and is heated to 120°C by a tar heat exchanger to enter Dehydration tower, water and part of light oil are separated from the top of the dehydration tower (the main property indicators are shown in Table 2), and the bottom of the tower is anhydrous tar. The dehydration tower is equipped with 12 high-efficiency trays to ensure distillation efficiency.

[0021] The dehydrated tar passes through a heat transfer oil heat exchanger and is heated to 270°C by a tubular heating furnace and enters the middle and lower part of the tar main tower. The bottom of the tower is heated by a tubular heating furnace for a heating cycle. The light phenol-naphthalene washing four mixed distillate is cut from the...

Embodiment 2

[0023] As shown in the accompanying drawings, in the coal tar deep processing technology based on four-mixed fractions provided by another preferred embodiment of the present invention, the high-temperature coal tar produced by blast furnace coke production has properties shown in Table 1 and is heated to 120 °C through a tar heat exchanger. ℃ enters the dehydration tower, and water and part of light oil are separated from the top of the dehydration tower (the main property indicators are shown in Table 2), and the bottom of the tower is anhydrous tar. The dehydration tower is equipped with 12 high-efficiency trays to ensure distillation efficiency.

[0024] The dehydrated tar passes through a heat transfer oil heat exchanger and is heated to 270°C by a tubular heating furnace and enters the middle and lower part of the tar main tower. The bottom of the tower is heated by a tubular heating furnace for a heating cycle. The light phenol-naphthalene washing four mixed distillate ...

Embodiment 3

[0027] As shown in the accompanying drawings, in the coal tar deep processing technology based on four-mixed fractions provided by another preferred embodiment of the present invention, the high-temperature coal tar produced by blast furnace coke production has properties shown in Table 1, and is heated to 120 °C through a tar heat exchanger. ℃ enters the dehydration tower, and water and part of light oil are separated from the top of the dehydration tower (the main property indicators are shown in Table 2), and the bottom of the tower is anhydrous tar. The dehydration tower is equipped with 12 high-efficiency trays to ensure distillation efficiency.

[0028] The dehydrated tar passes through a heat transfer oil heat exchanger and is heated to 270°C by a tubular heating furnace and enters the middle and lower part of the tar main tower. The bottom of the tower is heated by a tubular heating furnace for a heating cycle. The light phenol-naphthalene washing four mixed distillate...

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Abstract

The invention discloses a coal tar deep processing technology based on four mixed fractions. The coal tar deep processing technology comprises the following steps: heating raw material tar by a coke tar heat exchanger to 105-130 DEG C and then entering into a dehydrating tower with 4-12 layers of trays; separating out water and partial light oil from the tower top of the dehydrating tower, and separating out anhydrous tar from the tower bottom of the dehydrating tower; processing the dehydrated tar through a conductive oil heat exchanger and heating to 240 DEG C-300 DEG C by a tubular heating furnace, and then entering into the lower middle part of a main tar tower which is provided with 15-35 layers of trays and is provided with 2-10 layers of trays in a stripping section; performing heating circulation by using the tubular heating furnace at the tower bottom; washing four mixed fractions with light phenol naphthalene cut at the tower top, cooling the four mixed fractions and dephenolizing to obtain a phenol product and a washed fraction, and processing the washed fraction in an industrial naphthalene processing device so as to obtain dephenolized phenol oil, an industrial naphthalene product and high-quality absorber oil; and obtaining mixed oil from the tower bottom, wherein the mixed oil can be directly used for producing high-quality carbon black or mesothermal pitch according to the market conditon.

Description

technical field [0001] The invention belongs to the technical field of tar processing, and relates to a novel high-efficiency and low-consumption tar processing technology, in particular to a coal tar deep processing technology based on four mixed fractions. Background technique [0002] my country is a large coal-producing country. As a by-product of coke production, the annual output of coal tar has exceeded 10 million tons. With the development of iron and steel enterprises, the reasonable utilization of coal tar has gradually been highly valued by people. [0003] At present, the existing tar distillation processes are as follows: (1) The most common atmospheric pressure one-tower and two-tower processes are used in coking plants across the country, and the industrial naphthalene distillation adopts a double-furnace double-tower distillation process. The process is mature and stable, but the disadvantages are normal pressure operation, steam distillation, high energy con...

Claims

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Application Information

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IPC IPC(8): C10C1/00C10C1/02C10C1/08C10C1/12C10C1/14C10C1/16
Inventor 余兆祥黄恒波杨勇李现坡
Owner 上海同特化工科技有限公司
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