Wet spinning acrylic fiber production polymerization wastewater treatment system and treatment method

Abstract

The invention discloses a wet spinning acrylic production polymeric wastewater treatment system and a treatment method. The system comprises a gas-energy-flocculation device for flocculation, a multielement catalytic oxidizer for oxidation treatment, a biochemical intake sump, a membrane bioreactor for biological reaction and a biochemical outlet sump which are arranged in order. The treatment method comprises a gas-energy-flocculation pretreatment and one or several times of the following steps: multielement catalytic oxidization treatment; and membrane biotreatment. The invention has the following advantages: the gas-energy-flocculation technology is adopted as polymeric wastewater pretreatment, the particular vortex three-phase mixing technology of gas-energy-flocculation can maximize utilization of chemical agents and fully capture fine pollution particles and colloid, turbidity removal rate of polymeric wastewater is high, and subsequent multielement catalytic oxidization and biochemical intake water quality requirements can be effectively guaranteed.

Description

technical field [0001] The invention relates to a method for producing and treating wet-spun acrylic fibers, which belongs to the field of environmental engineering. Background technique [0002] The two-step wet-spinning acrylic fiber production device mainly includes units such as polymerization, spinning, recycling, and short fiber. The wastewater discharged during the acrylic fiber production process is mainly composed of polymerization wastewater, spinning wastewater and recycling wastewater; wherein the polymerization device produces wastewater (ie, polymerization Wastewater) mainly comes from the drainage of the washing machine filtrate receiving tank, the overflow water of the sealing water receiving tank, the overflow water of the dehydrator filtrate receiving tank, the oxidant, the catalyst preparation plant floor flushing water, the device floor flushing water, pump sealing water, etc. [0003] The main pollutants in polymerization wastewater include unreacted mon...

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Problems solved by technology

The plant has carried out a number of biochemical effluent advanced treatment tests, using technologies including ozone catalytic oxidation, Fenton oxidation, iron-carbon internal electrolysis, etc., but the treated water quality cannot reach COD cr Emission requirements less than 100mg / L

[0013] At present, the treatment effect of acrylic fiber production wastewater is generally unsatisfactory. The current treatment methods include biological filter, pure oxygen aeration, biological contact oxidation, plug-flow activated sludge and other secondary biological treatment methods can not achieve the stability of acrylic fiber wastewater. emissions target

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