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Process for treating and controlling acid waste water containing fluorine

A technology for acid wastewater and wastewater treatment, which is applied in water/sewage treatment, chemical instruments and methods, neutralized water/sewage treatment, etc. Environmental conditions and the effect of reducing safety hazards

Inactive Publication Date: 2006-01-25
WENGFU (GRP) CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a treatment method for fluorine-containing acidic wastewater that can be applied to the production process of high-concentration phosphate fertilizers, so as to solve the pollution problem of fluorine-containing acidic wastewater to the environment

Method used

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  • Process for treating and controlling acid waste water containing fluorine

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Embodiment

[0016] Embodiment: Guizhou Hongfu Industrial Development Co., Ltd. Wengfu Phosphate Fertilizer Factory has the following waste water in the production process: ① Sulfuric acid branch factory waste water, 20m 3 / h, mainly containing sulfuric acid and SO 2 ; ② Phosphoric acid plant waste water, 120m 3 / h, mainly containing fluoride ions; 3 / h, mainly containing fluoride ions; ④Wastewater from slag field, 100m 3 / h, mainly containing fluoride ions and P 2 o 5 . Sulfuric acid wastewater is discharged into the wastewater pool of the sewage treatment station through pipes alone, and the rest of the process wastewater is collected in the main sewage pipe of the factory area and discharged into the wastewater pool of the sewage treatment station. Then proceed as follows:

[0017] The first step is to pump the above-mentioned fluorine-containing acidic wastewater from the wastewater pool into the primary reaction tank with a 150-WFKB submerged pump, add lime milk and stir vigorou...

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Abstract

A process for treating the F-contained acidic sewage generated by producing P fertilizer includes such steps as pumping the sewage in class-one reaction pool, adding lime milk, neutralizing, mixing it with efficient composite water treating agent in an efficient concentrating machine, depositing, pumping the supernatant in the class-two reaction pool, adding lime milk for regulating pH value, press filtering the sludge, transporting the cake to stack yard, pumping the filtrate in the class-one reaction pool, mixing the slurry of the class-two reaction pool with said water treating agent in class-two slant depositing pool, depositing, regulating the pH value of its supernatant for draining, and regulating the pH value of its sludge for returning it back to the class-one depositing pool.

Description

technical field [0001] The invention relates to waste water treatment, in particular to a treatment method for fluorine-containing acid waste water produced in the production process of phosphate fertilizer. Background technique [0002] During the production process of high-concentration phosphate fertilizers such as ammonium phosphate and double superphosphate, as well as phosphogypsum slag, a large amount of acidic wastewater mainly containing fluoride ions will be produced, which contains fluoride, phosphoric acid, phosphate, sulfuric acid and suspended matter. This kind of wastewater is usually treated by lime milk graded neutralization process, so that the fluorine and phosphorus in the treated wastewater can reach the allowable discharge index. However, due to the interference of a large number of other ions in the actual production process, the fluoride ion content of the wastewater treated by the original process is difficult to control within the allowable discharg...

Claims

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Application Information

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IPC IPC(8): C02F1/58C02F1/66C02F101/14
Inventor 何庭云张金栋
Owner WENGFU (GRP) CO LTD
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