A method and device for maximizing the preparation of phenol-containing oil and diesel oil from coal tar

A technology for coal tar and diesel oil, which is applied in heating/cooling refining, tar processing by distillation, petroleum industry, etc., can solve the problems of inability to handle pulverized coal tar, low yield of phenolic oil, etc., so as to improve comprehensive utilization rate, yield realization, and the effect of reducing difficulty

Active Publication Date: 2017-10-03
SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect of low yield of phenol-containing oil in the existing technology of producing crude phenol from coal tar, and further provide a method and device for maximizing the preparation of phenol-containing oil and diesel oil from coal tar
[0007] Another technical problem to be solved by the present invention is to overcome the defect that the existing coal tar crude phenol technology cannot handle the tar containing pulverized coal, and then provide a kind of raw material containing pulverized coal tar to maximize the preparation of phenol-containing oil and diesel oil method and device

Method used

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  • A method and device for maximizing the preparation of phenol-containing oil and diesel oil from coal tar
  • A method and device for maximizing the preparation of phenol-containing oil and diesel oil from coal tar

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Embodiment 1

[0054] The method of utilizing coal tar to maximize the preparation of phenol-containing oil and diesel oil described in this embodiment includes:

[0055] (1) The medium-temperature coal tar is sent into the flash tower 4, and the coal tar is flashed under the conditions of 0.22MPa and 290° C., and the flash steam is collected at the top of the tower, and the liquid in the tower is the flash oil;

[0056] (2) The flash oil enters the coke tower 8, and carries out delayed coking under the conditions of 480°C, 0.2MPa, and a circulation ratio of 0.3, where cracking and condensation reactions occur to generate oil gas and pitch coke, and the pitch coke is decoked by hydraulic force Exit the coke tower;

[0057] (3) The flash gas of step (1) and the oil and gas of step (2) all enter the fractionation tower 9 and carry out fractionation treatment under the condition that the tower top pressure is 0.16MPa and the tower top temperature is 130°C, and the fractionation tower is from to...

Embodiment 2

[0061] The method of utilizing coal tar to maximize the preparation of phenol-containing oil and diesel oil described in this embodiment includes:

[0062] (1) Transport the pulverized coal tar to the preheating furnace 3 for preheating to 300° C. and then mix and exchange heat with part of the tail oil from the fractionation tower 9 to form a mixed oil, and then send the mixed oil to the flash tower 4. Under the conditions of MPa and 320°C, the mixed oil is flashed, and the flash steam is collected at the top of the tower, and the liquid in the tower is the flash oil;

[0063] Wherein the dust content in the pulverized coal-containing tar is 10wt%, the dust is coke powder and / or coal powder, and the particle size of the dust is less than 100 μm.

[0064] (2) The flash oil enters the coke tower 8 after being heated to 480°C by the heating furnace 6, and carries out delayed coking under the conditions of 480°C, 0.1MPa, and a circulation ratio of 0.55, and cracks and condenses t...

Embodiment 3

[0070] The method of utilizing coal tar to maximize the preparation of phenol-containing oil and diesel oil described in this embodiment includes:

[0071] (1) Transport the pulverized coal tar through the buffer tank 1 to the preheating furnace 3 for preheating to 320°C, then mix and exchange heat with part of the tail oil from the fractionating tower 9 to form a mixed oil, and then send the mixed oil to the flash tower 4. Under the conditions of 0.32MPa and 335°C, the mixed oil is flashed, and the flash steam is collected at the top of the tower, and the liquid in the tower is the flash oil;

[0072] Wherein the dust content in the tar containing pulverized coal is 5.5wt%, the dust is coke powder and / or coal powder, and the particle size of the dust is less than 100 μm.

[0073] (2) The flash oil enters the coke tower 8 after being heated up to 420°C by the heating furnace 6, and carries out delayed coking under the conditions of 420°C, 0.3MPa, and a circulation ratio of 0.8...

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Abstract

The invention provides a method and a device for maximally preparing phenol-containing oil and diesel oil from coal tar. The method comprises steps as follows: coal tar is subjected to flash evaporation treatment, obtained flash evaporation oil is subjected to delayed coking, and oil gas and pitch coke are prepared; flash evaporation gas and oil gas are subjected to fractional distillation together, and crude gasoline, overhead cycle oil, crude diesel oil and tail oil are obtained; the crude gasoline is separated, and stable gasoline is prepared and mixed with the overhead cycle oil to be used as the phenol-containing oil; the crude diesel oil is subjected to hydrotreatment, and refined diesel oil and naphtha are obtained. With the adoption of the method, the crude gasoline is separated initiatively, the stable gasoline is obtained and mixed with the overhead cycle oil to be used as the phenol-containing oil, compared with an existing technology for preparing crude phenol from coal tar, the method has the advantages that the crude gasoline approximately accounting for 40wt% of the total amount of the phenol-containing oil in the coal tar is properly treated to be used as the phenol-containing oil, and the yield of the phenol-containing oil is greatly increased, so that the yield of the phenol-containing oil prepared from the coal tar is maximized.

Description

technical field [0001] The invention relates to the technical field of coal tar processing, in particular to a method and a device for maximizing the preparation of phenol-containing oil and diesel oil from coal tar. Background technique [0002] my country is a big consumer of petroleum products, but at the same time it is a country with poor petroleum resources and relatively rich coal resources. With the depletion of petroleum resources and the increasing demand for energy, the prices of some petrochemical products have risen sharply, and these chemical products can also be directly or directly obtained from coal gasification, dry distillation and other products. Indirectly obtained, so the use of advanced coal conversion technology to develop modern coal chemical industry and produce gasoline, diesel and chemical products will not only play a positive role in promoting the industrial structure adjustment of the chemical industry and upgrading the industrial energy level, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10G31/06C10C1/04
CPCC10C1/04C10G31/06C10G2400/04
Inventor 王守峰李锦涛常景泉李秀辉苗喜林
Owner SHAANXI COAL & CHEM IND GRP SHENMU TIANYUAN CHEM IND
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