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Acid tar processing method

A treatment method, acid tar technology, applied in the coking oven, petroleum industry, etc., can solve the problems of equipment corrosion, misunderstanding of acid tar, high treatment cost, etc., and achieve the effect of preventing precipitation and stratification, improving fluidity and reducing corrosion

Inactive Publication Date: 2007-09-19
SHANGHAI MEISHAN IRON & STEEL CO LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

The former is bound to cause certain pollution to the environment; the latter recycles sulfuric acid to produce ferric sulfate or recycles tar, the production process is more complicated, and the processing cost is higher
The treatment of acid tar has always been a technical problem that has plagued the coking industry for a long time. Before that, people did not use acid tar in the production of coking coal blending industry. The main reason was that there was a misunderstanding about acid tar. Serious, it will have a great impact on the quality of coke

Method used

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Embodiment Construction

[0022] A coking plant has an annual output of 5,000 tons of waste acid tar, and the amount of coking coal blending is 1.8 million tons. The waste acid tar can be blended into 0.5% of the coking coal in a suitable way, which can completely consume the waste acid tar produced by the factory.

[0023] Specific process flow: Add the lye in the alkali tank, such as sodium hydroxide solution, into the waste acid tank through the pump, and stir continuously through the agitator. After mixing, the pH value of the solution is controlled at 6-8. In the tank where acid tar and alkali are mixed The neutralization reaction temperature is maintained at 80-100°C by heating around. The mixed solution is pumped to the tank car, and the tank car sends the mixed solution to the coal blending workshop, where it is pumped into the waste acid tank. The spent acid tank needs to be heated and kept at 50-80°C to prevent the mixed solution from stratifying and settling. The mixed solution is sent by th...

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Abstract

The invention relates to a method of processing acid tar, concretely is a method of processing acid tar by coal blending coking, which mainly solves technical problems of environment pollution made by the acid tar. Technical project for solving the problems includes steps: a) adding alkaline solution into the acid tar to adjusting pH value of 6-8 at 80-100 DEG C; b) putting mixed liquid of the acid tar and the alkaline solution in waste acid groove beside coal blending belt of coal blending workshop, wherein the waste acid groove must be heated to 50-80 DEG C to prevent the mixed liquid from delaminating and depositing; c) adding the mixed solution befittingly into coal blending by pipe and spraying device. Adding mode of the mixed solution is continuously adding at upper of the coal blending belt when the belt is carrying coal, and stopping when the belt stops. The invention is mainly used for post-treatment of acid tar generated from coking plant.

Description

Technical field: [0001] The invention relates to a method for processing acid tar, in particular to a method for processing acid tar by using coal blending and coking. Background technique: [0002] Sulfuric acid washing process is adopted in the processing of coking light benzene. Light benzene first enters the initial distillation tower, and the unwashed mixture discharged from the bottom of the tower enters the washing process. The unsaturated compounds and sulfides in light benzene react with concentrated sulfuric acid to generate saturated fat and transfer to the final residue. After the reaction reaches a certain level, water is added to stop the reaction, and tar waste acid is obtained at the bottom of the acid oil separator. [0003] In addition to sulfuric acid, tar waste acid also contains a certain amount of tar because the acid oil is not completely separated in the acid oil separator. Acid tar is dark brown, heavy in density, thick in shape, extremely poor in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10B57/06
Inventor 任学延张文成王国辉
Owner SHANGHAI MEISHAN IRON & STEEL CO LTD
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