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Acid tar oil treating method

A treatment method and technology for acid tar, applied in the direction of refining tar by chemical method, etc., can solve the problems of high labor intensity, excessive volatile components, difficult to handle, etc., to solve technical problems, eliminate serious harm, and have positive social effects. Effect

Inactive Publication Date: 2005-11-09
SICHUAN DAZHOU IRON & STEEL GROUP
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Problems solved by technology

The first method can be used as a measure of interest for a small amount of ammonium sulfate tar, but for the by-product of ammonium sulfate tar in large-scale industrial production, the land where it is buried will become a swamp of ammonium sulfate tar, and no grass will grow , the trees will die in pieces, which will cause great damage to the human ecological environment
The second method is labor-intensive, the toxicity of ammonium sulfate tar will greatly endanger the health of workers, and the production equipment is severely corroded (especially the pulverizer hammer, shell, transmission pin, coal belt, etc. are the most prominent)
At the same time, it is easy to agglomerate in the top silo of the coke oven, which is not only difficult to feed, but also difficult to deal with once the blockage occurs. More importantly, the coking coal blending with ammonium sulfate tar will affect the quality of coke, making the Its strength is uneven, its volatile components exceed the standard, and its raw and cooked are uneven, so it cannot be used as coke for metallurgy.

Method used

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Embodiment Construction

[0023]The coking plant adopts the semi-direct method to recover the nitrogen from the coal gas to produce ammonium sulfate, and put the sulphuric acid tar and dilute ammonia water in the neutralization reaction tank 1. The added amount of the sulphuric acid tar and the diluted ammonia is mixed according to the reaction neutralization. The pH value of the solution is controlled at 6.5. After sulphuric acid tar and dilute ammonia are added to the reaction tank, open the control valve 2 and close the control valve 3, and pass into the neutralization reaction tank through a pipe connection located on the bottom of the reaction tank and also serving as an output pipe connection for the neutralization reaction mixture solution. , The liquid in the reaction tank is heated and maintained at about 80°C to dissolve the sulphuric acid tar in the dilute ammonia, and the sulfuric acid contained in the sulphuric acid tar is neutralized with the dilute ammonia. The reaction time is not less than...

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Abstract

A process for treating the acidic tar, which is the by-product in preparing ammonium sulfate from N2 in gas generated in coking plant and has severe environmental pollution features that its another by-product, diluted ammonia water is used to neutralize the sulfuric acid in said acidic tar and recover tar.

Description

1. Technical Field [0001] The present invention relates to the technical field of "three wastes" treatment in a coking plant, in particular to the technical field of treatment of ammonium sulphate tar by-produced by the production of ammonium sulfate with gas discharged from a coking plant. 2. Background technology [0002] When coking plants use semi-direct methods to recover ammonia from coal gas to produce ammonium sulfate, they inevitably produce a by-product-ammonium sulfate tar. The sulphuric acid tar is dark brown, heavy in proportion, in the form of thick paste and small lumps, with extremely poor fluidity, poisonous and odorous, and seriously polluting the environment. So far, the treatment of sulphuric acid tar is still a headache. For the treatment of ammonium sulfate tar, there are two methods generally adopted at home and abroad, one is manual fishing and deep burying on the spot, and the other is manual fishing for coking and coal blending. The first method can be u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10C1/20
Inventor 李学攀江善明江亮夏兰李元廷
Owner SICHUAN DAZHOU IRON & STEEL GROUP
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