Viscose fiber production wastewater pretreatment neutralization process method

A viscose fiber and waste water production technology, applied in water/sewage treatment, chemical instruments and methods, multi-stage water/sewage treatment, etc., can solve random fluctuations in water quantity and quality, large amount of alkali used for neutralization, and impact on biochemistry Dealing with issues such as effects

Inactive Publication Date: 2020-10-27
山东雅美科技有限公司
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Problems solved by technology

The general treatment method is: the acidic wastewater is discharged to the sewage treatment plant and mixed with other sewage for unified treatment. The water volume and water quality fluctuate randomly. The wastewater entering the biochemical system often affects the subsequent biochemical treatment effect, and the amount of alkali used for neutralization is large. Cost higher source

Method used

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Embodiment Construction

[0017] A process method for pretreatment and neutralization of viscose fiber production wastewater, comprising the following steps: (1) centrally collecting viscose fiber acidic wastewater and stirring; collecting alkaline wastewater centrally and stirring; (2) collecting acidic wastewater The waste water is pumped to the reaction tank 1, and calcium carbonate slurry is added to the reaction tank; (3) The acidic water after mixing and sedimentation enters the reaction tank 2, and the alkaline wastewater is mixed with it before adding lime slurry; (4) The wastewater after mixing and sedimentation Enter the reaction pool three, add sodium hydroxide lye to neutralize and adjust the pH value; (5) The neutral and alkaline wastewater after mixed precipitation enters the intermediate pool, and then goes to the biochemical system.

[0018] The acidic water is collected centrally and pumped to reaction tank 1, where calcium carbonate CaCO 3 The calcium carbonate slurry formed by mixing...

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Abstract

The invention relates to a viscose fiber production wastewater pretreatment neutralization process method which comprises the following steps: (1) centrally collecting viscose fiber acidic wastewater,and stirring; collecting the alkaline wastewater in a centralized manner, and stirring; (2) pumping the acidic wastewater into a reaction tank I, and adding calcium carbonate slurry into the reactiontank; (3) feeding the reacted acidic water into a reaction tank II, mixing the alkaline wastewater with the acidic water, and then adding lime slurry; and (4) after the reaction, allowing the wastewater to enter a reaction tank III, and supplementing sodium hydroxide alkali liquor to neutralize and adjust the pH value. According to the method, the viscose fiber production wastewater is pretreatedand neutralized in a multi-stage neutralizing and settling mode, suspended solids in the wastewater can be reduced, the neutralizing effect can be improved, the operation cost can be reduced, and themethod has guiding significance in viscose fiber production wastewater treatment correspondingly.

Description

technical field [0001] The invention relates to a process method for pretreatment and neutralization of viscose fiber production wastewater, which belongs to the field of viscose fiber production, in particular to the field of treatment of viscose fiber production wastewater. Background technique [0002] The acidic wastewater discharged from the viscose fiber factory contains sulfuric acid, sodium sulfate, zinc sulfate, etc., and the alkaline wastewater contains sodium hydroxide, sulfide, etc. In general, the amount of acidic wastewater exceeds that of alkaline wastewater, and the amount of sulfuric acid is greater than that of alkali. The general treatment method is: the acidic wastewater is discharged to the sewage treatment plant and mixed with other sewage for unified treatment. The water volume and water quality fluctuate randomly. The wastewater entering the biochemical system often affects the subsequent biochemical treatment effect, and the amount of alkali used for ...

Claims

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Application Information

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IPC IPC(8): C02F9/04
CPCC02F1/5236C02F1/66C02F2001/007
Inventor 刘方波徐涛徐高学
Owner 山东雅美科技有限公司
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