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Process for reclaiming PVC slurry waste water using liquid phase suspension method

A waste water recovery and treatment process technology, applied in the field of environmental protection technology and water treatment, can solve the problems of poor biodegradability and high treatment difficulty of waste water

Inactive Publication Date: 2009-09-09
王小军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to relevant information, the BOD / COD ratio of PVC slurry wastewater is about 0.04, so the wastewater has poor biodegradability and is difficult to treat with biochemical methods

Method used

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  • Process for reclaiming PVC slurry waste water using liquid phase suspension method
  • Process for reclaiming PVC slurry waste water using liquid phase suspension method
  • Process for reclaiming PVC slurry waste water using liquid phase suspension method

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0005] 1. Raw water quality (extremely poor biodegradability; based on the water quality report provided by the user)

[0006] project COD ct Calcium ion temperature Suspended matter Chloride Turbidity PH Conductivity Alkalinity unit mg / l mg / l ℃ mg / L mg / l NTU μS / cm 2 mg / l data <169

<20

60～70 ≤40 <67

<110

8.43-9.6 300 61

[0007] 2. Water quality after treatment

[0008] For circulating water replenishment, the main influencing indicators of this raw water quality are COD and turbidity.

[0009] Other indicators have reached the standards when they ensure that these two indicators meet the standards. After comprehensive consideration, it is believed that the effluent index should be met

[0010] COD Mn <10mg / l Turbidity <2NTU

[0011] Attached to GB50335-2002 "Design Code for Wastewater Reclamation and Utilization Engineering", the control indicators for reclaimed water used as cooling water:

[0012] ...

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Abstract

The invention discloses waste water recycling disposing technology of polyvinyl chloride slurry through liquid-phase floating method in the environmental protective technique and water disposing technique domain, which is characterized by the following: combining cyclone concrete sediment, pressurized catalytic biological contact oxidization, oxidization sterilization, rough filter and fine filter; using specific concrete and oxide bactericide of PVC slurry, high-effect cyclone concrete sediment and pressurized catalytic biological contact oxidization tower to study the agent and equipment; removing COD and suspension in the PVC slurry step by step; making the outlet water reaching standard.

Description

1. Technical Field [0001] The invention provides a technology for recycling waste water from a polyvinyl chloride slurry produced by a liquid phase suspension method, which belongs to the technical field of environmental protection and the technical field of water treatment. 2. Background technology [0002] At present, domestic polyvinyl chloride plants generally use liquid phase suspension to produce polyvinyl chloride, and a large amount of slurry wastewater is discharged during the centrifugal dehydration of stripped slurry. Each ton of polyvinyl chloride produced produces about 5-10 tons of wastewater). The wastewater is characterized by high temperature (about 60~70℃), high suspended solids, turbidity and colloid content. At present, the most advanced PVC production process in the world does not involve the water treatment process, and still adopts the direct discharge treatment method. According to relevant information, the BOD / COD ratio of PVC slurry wastewater is about 0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/14C02F1/52C02F3/02C02F1/72C02F1/50C02F1/44C02F7/00C02F1/24
CPCY02W10/10
Inventor 王小军
Owner 王小军