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A kind of coal tar pretreatment method and its device

A technology for pretreatment and coal tar, applied in the field of coal chemical industry, can solve the problems of ineffective removal of colloids and asphaltenes in coal tar, high pretreatment cost, and achieves reduced treatment difficulty, less usage, and mild adsorption conditions. Effect

Active Publication Date: 2019-12-24
BEIJING HUASHI UNITED ENERGY TECH & DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For this reason, what the present invention intends to solve is that the existing oil pretreatment method cannot effectively remove colloids and asphaltenes in coal tar, and the defects of high pretreatment cost, and then provide a method that can effectively remove coal tar. The colloid and asphaltene, and the coal tar pretreatment method and its device with low processing cost

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  • A kind of coal tar pretreatment method and its device
  • A kind of coal tar pretreatment method and its device
  • A kind of coal tar pretreatment method and its device

Examples

Experimental program
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Effect test

Embodiment 1

[0047] The present embodiment provides a kind of pretreatment method of coal tar, comprises the steps:

[0048] (1) Pass into air in described coal tar, make particle diameter be 0.2mm, specific surface area be 150m 2 / g of semi-coke powder and coal tar are back-mixed and contacted at a mass ratio of 0.1:1, adsorbed at 50°C and 0MPa, and the air flow required for every 1kg of the semi-coke powder is 0.5m 3 / s;

[0049] (2) After the adsorption is completed, sedimentation and stratification are carried out, and the upper liquid phase and the lower layer slurry are collected respectively;

[0050] (3) Carry out solid-liquid separation to the upper liquid phase, collect liquid phase and solid phase, obtain the coal tar after purification;

[0051] (4) Combine the lower layer slurry and the solid phase, and knead the combined mixture and coal powder at a mass ratio of 1:1 to obtain caking asphalt.

[0052] Compared with the coal tar before pretreatment, the residual carbon value...

Embodiment 2

[0054] The present embodiment provides a kind of pretreatment method of coal tar, comprises the steps:

[0055] (1) Pass into air in described coal tar, make particle diameter be 0.5mm, specific surface area be 300m 2 / g of semi-coke powder and coal tar are back-mixed and contacted at a mass ratio of 0.2:1, adsorbed at 80°C and 1.0MPa, and the air flow required for every 1kg of the semi-coke powder is 0.8m 3 / s;

[0056] (2) After the adsorption is completed, sedimentation and stratification are carried out, and the upper liquid phase and the lower layer slurry are collected respectively;

[0057] (3) Carry out solid-liquid separation to the upper liquid phase, collect liquid phase and solid phase, obtain the coal tar after purification;

[0058] (4) Combine the lower layer slurry and the solid phase, and knead the combined mixture and coke powder at a mass ratio of 1.5:1 to obtain a bonded asphalt.

[0059] Compared with the coal tar before pretreatment, the residual carbo...

Embodiment 3

[0061] The present embodiment provides a kind of pretreatment method of coal tar, comprises the steps:

[0062] (1) Pass into air in described coal tar, make particle diameter be 1mm, specific surface area be 500m 2 / g of semi-coke powder and coal tar are back-mixed and contacted at a mass ratio of 0.05:1, adsorbed at 100°C and 0.5MPa, and the air flow required for every 1kg of the semi-coke powder is 1m 3 / s;

[0063] (2) After the adsorption is completed, sedimentation and stratification are carried out, and the upper liquid phase and the lower layer slurry are collected respectively;

[0064] (3) Carry out solid-liquid separation to the upper liquid phase, collect liquid phase and solid phase, obtain the coal tar after purification;

[0065] (4) Combine the lower layer slurry and the solid phase, and knead the combined mixture and coal powder at a mass ratio of 0.5:1 to obtain caking asphalt.

[0066] Compared with the coal tar before pretreatment, the residual carbon va...

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Abstract

The invention discloses a method or device for pretreating coal tar. The method for pretreating the coal tar includes the following steps of: (1) performing contact between the coal tar and adsorbentin a fluidized state so as to generate an effect of adsorption, wherein the adsorbent is semi-coke and / or kaolin; (2) after the adsorption in the step (1) is completed, performing sedimentation and layering, and collecting an upper-layer liquid phase; (3) and performing solid-liquid separation on the upper-layer liquid phase, and collecting a liquid phase to obtain purified coal tar. The method for pretreating the coal tar has a simple procedure, mild adsorption conditions and low-cost pretreatment, and colloid and asphaltene in the coal tar can be removed effectively. The device has simple connection and easy assembly, and the purpose of removal of the colloid, asphaltene and other solid impurities in the coal tar can be achieved effectively.

Description

technical field [0001] The invention belongs to the technical field of coal chemical industry, and in particular relates to a coal tar pretreatment method and a device thereof. Background technique [0002] Coal tar, also known as coal paste, coal distillate or coal tar solution, is a product produced in the process of producing crude gas by pyrolysis of coal in the coking industry. Colloids, asphaltenes and solid impurities, etc., make it very easy to coke during the processing (such as catalytic hydrogenation process), which will cause blockage of heat exchangers, reaction towers, heating furnaces and other equipment, affecting the long-term cycle of the system run. For this reason, the prior art usually uses solvent deasphalting to concentrate the asphaltenes and metals in the coal tar in the asphalt, and finally obtain deoiled asphalt and deasphalted oil. The solvents commonly used in this process include propane, iso Organic solvents such as butane, n-butane, and pent...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/00
CPCC10C1/00
Inventor 李林路阳李春桃
Owner BEIJING HUASHI UNITED ENERGY TECH & DEV
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