A method and device for treating wastewater in a suspension polyvinyl chloride polymerization section

A polyvinyl chloride and wastewater treatment technology, applied in water/sewage treatment, natural water treatment, biological water/sewage treatment, etc., can solve the problems of substandard wastewater treatment and high energy consumption for treatment, and achieve rapid and effective removal and mass transfer High efficiency and efficient removal effect

Active Publication Date: 2018-01-09
北京中科众联新能源技术服务有限公司
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Problems solved by technology

[0004] The present invention aims at the deficiencies of the existing suspension polyvinyl chloride polymerization section wastewater treatment not up to standard and high energy consumption, and provides a treatment process with compact structure, good treatment effect, high treatment efficiency, and simultaneous removal of various organic pollutants ( method) and device

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  • A method and device for treating wastewater in a suspension polyvinyl chloride polymerization section
  • A method and device for treating wastewater in a suspension polyvinyl chloride polymerization section
  • A method and device for treating wastewater in a suspension polyvinyl chloride polymerization section

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Embodiment Construction

[0039] The present invention will be described in further detail below through a specific embodiment and in conjunction with the accompanying drawings. The same reference numerals in the drawings represent the same and similar parts.

[0040] see figure 1 , PVC slurry stripping waste water with 20m 3 The flow rate of / h first enters the first regulating tank to balance the water quality and quantity, and the residence time is 8h, and then enters the microbubble pre-oxidation unit, the residence time is 30-40min, and the ozone concentration is 20-40mg / L. Remaining O 3 Under the action of the high-efficiency catalyst in the ozone tail gas destruction device, the catalytic generation of O 2 .

[0041] Pre-oxidized slurry stripping wastewater and cooled, pre-sedimented centrifugal mother liquor wastewater (160m 3 / h) into the second regulation pool, and then into the primary biochemical pool. The first-level biochemical pool is a stuffed biofilm reactor, and the reaction poo...

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Abstract

The invention discloses a method and device for treating wastewater in a suspension polyvinyl chloride polymerization section. The process mainly includes the following steps: (1) PVC slurry stripping wastewater first enters a first adjustment tank for homogeneous adjustment, and then enters pre-oxidation (2) PVC centrifuge mother liquid waste water first enters the cooling tower to cool down, and then enters the sedimentation tank; (3) The waste water after step (1) and (2) enters the second regulating pool, the first biochemical pool, the second Level biochemical section, coagulation sedimentation tank and advanced treatment section, the effluent after advanced treatment can be reused. The process innovatively adopts the combined process of microbubble pre-oxidation-filler biofilm reactor-AFMABR-advanced treatment. The treatment of each unit is highly targeted and provides a favorable environment for subsequent unit treatment. Various characteristic pollutants can be efficiently removed at the same time. The system has the advantages of high processing efficiency, low energy consumption, small footprint, and strong impact resistance.

Description

technical field [0001] The invention generally relates to the field of industrial waste water treatment, and in particular to a waste water treatment device and method in a suspension polyvinyl chloride polymerization section. Background technique [0002] my country's chlor-alkali industry is mainly concentrated in water-scarce areas in the northwest. With the increase of polyvinyl chloride (PVC) production, water consumption and drainage have also risen sharply. water pressure. [0003] The wastewater produced in the polyvinyl chloride polymerization section of the suspension method mainly includes the washing water of the coating wall of the polymerization tank, the drainage and condensed water of the recovered VCM storage tank, the sealing water of the compressor, the condensed water at the top of the slurry stripping tower, and the stripped PVC polymer resin slurry. Then send the filtered mother liquor produced by centrifugal filter separation. This type of wastewater ...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14
CPCC02F1/001C02F1/32C02F1/4672C02F1/52C02F1/5236C02F1/56C02F1/722C02F1/725C02F1/78C02F3/1268C02F3/301C02F3/302C02F9/00C02F2001/007C02F2103/38
Inventor 李开明刘政王宇
Owner 北京中科众联新能源技术服务有限公司
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