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Coal tar processing method

A processing method and technology for coal tar, which are applied in the petroleum industry, coke ovens, coking carbon-containing materials, etc., and can solve the problems that similar methods have not been reported.

Active Publication Date: 2010-11-24
何巨堂
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Similar method of the present invention has not been reported

Method used

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Embodiment

[0034] The properties of medium temperature coal tar are shown in Table 1. The invention is used for separation. The fractionation tower is divided into upper and lower sections. The upper section of the fractionation tower is a rectification section, and the lower section of the fractionation tower includes a washing section, coal tar raw material flashing section and steam stripping. segment. The pressure at the top of the fractionation tower is 0.02MPa, and all coal tar is separated into the top oil discharged from the reflux tank at the top of the tower, the oil extracted from the middle section of the tower (diesel oil), the oil extracted from the middle section of the tower lower part (wax oil), the oil thrown from the washing section and the tower Bottom residue. After the oil sling outside the washing section is heated to the temperature T1, it is mixed with the residual oil at the temperature T2 and then coked together. The temperature T1 is 50°C higher than the temper...

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Abstract

The invention relates to a coal tar processing method, which comprises the following steps of: feeding coal tar into a fractionating tower T, setting a washing section at a position above a coal tar feeding hole of the fractionating tower T, discharging washing section outside throwing oil from the washing section, and discharging residual oil from the bottom of the fractionating tower T; and further heating the washing section outside throwing oil to a temperature T1, and coking the heated washing section outside throwing oil and the residual oil at a temperature T2 together, wherein the temperature T1 is higher than the temperature T2. The coal tar processing method has the advantages of improving the flexibility of controlling the asphalt content of lightweight distillate oil and effectively reducing the exit temperature of a residual oil heating furnace.

Description

Technical field [0001] The invention relates to a coal tar processing method, which is particularly suitable for the separation process and coking process of medium and low temperature coal tar. Background technique [0002] As we all know, the medium and low temperature coal tar from coal pyrolysis or coal gasification or other processes contains a large amount of light oil components suitable for hydroconversion (such as naphtha components with a conventional boiling point below 510℃, diesel components). The coal tar oil or its residual oil contains a large amount of asphaltenes, ash and particulate matter. The production operation shows that the coal tar fractionation tower usually adopts the feed heating furnace, and the upper tower of the feed port The internal liquid return flow is very small. When the washing section is set up, part of the liquid is drawn from the tower and then returned to the upper part of the tower to increase the liquid flow of the tower section to was...

Claims

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Application Information

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IPC IPC(8): C10G7/00C10B55/00
Inventor 何巨堂
Owner 何巨堂
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