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Coke tar distillation process

A tar and process technology, applied in the field of tar production process, can solve the problems of complex distillation process, poor dehydration effect, and poor dehydration time, and achieve the effects of improving the operating environment, saving costs, and fast dehydration speed

Inactive Publication Date: 2018-02-16
CHENGDU ARITIME INTELLIGENT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a tar distillation process, which can effectively solve the problems in the prior art of poor dehydration time, poor dehydration effect, complicated subsequent distillation process, high cost, and environmental pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of tar distillation process, comprises the following steps:

[0027] (1) Mix the raw material tar with a dehydrating agent, heat to 75°C, and perform dehydration treatment under the condition of an electric field strength of 2000V / cm. The treatment time is 75min. The final tar is tar after dehydration;

[0028] Wherein, the dehydrating agent comprises the following components in weight percentage: 1.5wt% phenalkamine polyoxypropylene polyoxyethylene ether, 1wt% polyether, 2wt% methanol, 95wt% mass fraction is 30% sodium acetate aqueous solution, and the balance is water ; Add 150 mg of dehydrating agent in every kilogram of raw tar;

[0029] (2) Put the dehydrated tar in the 1# distillation tower and carry out distillation under normal pressure conditions. The oil fraction is cooled by a condenser to obtain light oil; then the temperature is raised to a tower top temperature of 170-190°C, a naphthalene oil fraction extraction plate temperature of 215-235°C, and...

Embodiment 2

[0038] A kind of tar distillation process, comprises the following steps:

[0039] (1) Mix raw material tar with dehydrating agent, heat to 85°C, and perform dehydration treatment under the condition of electric field strength of 3000V / cm, the treatment time is 60min, remove supernatant after layering, supernatant flows into ammonia water tank, separates The final tar is tar after dehydration;

[0040] Wherein, the dehydrating agent comprises the following components in weight percentage: 1wt% phenalkamine polyoxypropylene polyoxyethylene ether, 0.5wt% polyether, 1wt% methanol, 90wt% mass fraction is 35% sodium acetate aqueous solution, and the balance is water ; Add 300 mg of dehydrating agent in every kilogram of raw tar;

[0041] (2) Put the dehydrated tar in the 1# distillation tower, and carry out distillation under normal pressure conditions. The oil fraction is cooled by a condenser to obtain light oil; then the temperature is raised to a tower top temperature of 170-...

Embodiment 3

[0050] A kind of tar distillation process, comprises the following steps:

[0051] (1) Mix the raw material tar with a dehydrating agent, heat to 85°C, and perform dehydration treatment under the condition of an electric field strength of 2500V / cm. The treatment time is 70min. The final tar is the tar after dehydration;

[0052] Wherein, the dehydrating agent comprises the following components in weight percent: 1.2wt% phenalkamine polyoxypropylene polyoxyethylene ether, 1wt% polyether, 1.5wt% methyl alcohol, 93wt% mass fraction is the sodium acetate aqueous solution of 35%, and the balance is Water; Add 250 mg of dehydrating agent in every kilogram of raw tar;

[0053] (2) Put the dehydrated tar in the 1# distillation tower, and carry out distillation under normal pressure conditions. The oil fraction is cooled by a condenser to obtain light oil; then the temperature is raised to a tower top temperature of 170-190°C, a naphthalene oil fraction extraction plate temperature o...

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Abstract

The invention discloses a coke tar distillation process. The coke tar distillation process comprises the following steps: (1) mixing raw material coke tar with a dehydrating agent, heating the mixture, carrying out dehydrating treatment under the condition that the electric field intensity is 2,000-3,000 V / cm for 60-75 min, and removing liquid supernatant after layering to obtain dehydrated coke tar; (2) placing the dehydrated coke tar in a 1# distillation tower, carrying out distillation under the condition of normal pressure, removing light oil distillate, then heating, producing carbolic oil fraction on the top of the tower, and cutting naphthalene oil fraction on a side line; and (3) heating mixed oil obtained from the bottom of the 1# distillation tower via a tubular heating furnace,then feeding the mixed oil into a 2# distillation tower, producing heavy scrubbing oil fraction on the top of the tower under the condition of reduced pressure, cutting first anthracene oil fraction and second anthracene oil fraction from a side line, and producing medium-temperature pitch from the bottom of the tower. The distillation process is good in dehydrating effect, simple to operate and low in cost, is energy-saving and environmentally friendly, and is suitable for large-scale coke tar processing engineering.

Description

technical field [0001] The invention belongs to a tar production process, in particular to a tar distillation process. Background technique [0002] Tar, also known as coal tar or coal paste, is a black or dark brown viscous liquid obtained during the dry distillation of coal. It has a special odor, is flammable and corrosive, and is a highly aromatic hydrocarbon. complex mixture. There are tens of thousands of substances in tar, more than 500 kinds of substances have been identified, and more than 200 kinds of products can be processed. Since tar processing is composed of rough separation, fine processing, and obtaining high value-added products, rough separation is an indispensable basis for subsequent processing, and the effect of rough separation will directly affect the quality, yield and energy of subsequent deep-processing products. In addition, because there is a small amount of water in the tar, an emulsion of water and tar is formed, which makes the heating of th...

Claims

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Application Information

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IPC IPC(8): C10C1/02C10C1/08C10C1/12C10C1/16C10C1/14
CPCC10C1/02C10C1/08C10C1/12C10C1/14C10C1/16
Inventor 郑朝辉刘才佐刘静关力
Owner CHENGDU ARITIME INTELLIGENT CONTROL
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