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Polyvinyl chloride centrifugal mother liquid multi-method combined pretreatment method

A technology of centrifuging mother liquor and polyvinyl chloride, which is applied in water/sewage multi-stage treatment, sedimentation treatment, water/sewage treatment and other directions, can solve the problem that the operation cost cannot be put into use, and the maximum value of mother liquor water reuse, salinity, The problem of incomplete removal of organic matter, etc., can reduce production costs, solve the problem that membrane pores are often blocked, and reduce biodegradability.

Inactive Publication Date: 2017-09-19
CHUZHOU HONGYUAN SPRAYING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] When the above-mentioned treatment methods and processes are treated separately, either the salt and organic matter in the water are not completely removed, or they cannot be put into actual production due to problems such as operating costs.
Even if the technology can be put into use, the treated water can only be used for primary reuse such as circulating cooling water replenishment, and cannot achieve the maximum value of mother liquor water reuse

Method used

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Examples

Experimental program
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Embodiment Construction

[0017] A multi-method combined pretreatment method for polyvinyl chloride centrifugal mother liquor, comprising the following specific steps:

[0018] (1) Heat the centrifuged mother liquor through a cooling tower to reduce the temperature of the centrifuged mother liquor to below 35°C, then pass it into the regulating tank with a pre-aeration device, control the ventilation rate to 30L / h, and mix the water quality and water quantity Carry out hydrolytic acidification treatment afterward, stir 4 hours with the agitator of 120 rev / mins;

[0019] (2) Send the centrifuged mother liquor treated in step (1) into a contact oxidation tank with an aeration device for treatment, control the aeration rate at 20L / h, react for 6 hours, and then pass through the sedimentation tank, add 1L centrifuged mother liquor Add 0.08g of polyaluminum chloride and 8mg of polyacrylamide into the mother liquor, stir at a speed of 300 rpm for 30 minutes and then let it stand for 2 hours. into the quartz...

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Abstract

The invention discloses a polyvinyl chloride centrifugal mother liquid multi-method combined pretreatment method. Through a series of process steps, polyvinyl chloride centrifugal mother liquid is fully pretreated; the biodegradability of the centrifugal mother liquid can be lowered; the problem that membrane holes are often blocked in the subsequent membrane treatment process is solved; the work efficiency is improved; meanwhile, the treated centrifugal mother liquid can be reutilized to the production through water circulation and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of polyvinyl chloride production wastewater treatment, in particular to a multi-method combined pretreatment method for polyvinyl chloride centrifugal mother liquor. Background technique [0002] Polyvinyl chloride (PVC) is one of the main general-purpose plastic varieties. Because of its good physical and mechanical properties, it is widely used in the production of building materials, textile processing, papermaking and paper processing, packaging materials, and can also be used as an emulsion stabilizer. The wastewater produced in the polyvinyl chloride polymerization section is mainly centrifuged mother liquor wastewater. Centrifugal mother liquor wastewater requires different reaction temperatures for different polymerization degree reaction systems during the polymerization process, so the temperature of the discharged centrifuged mother liquor is generally around 60°C; and the organic matter in the w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/38
CPCC02F1/5236C02F1/56C02F1/78C02F3/02C02F3/28C02F9/00C02F2001/007C02F2103/38
Inventor 王新志张凯郑海迪
Owner CHUZHOU HONGYUAN SPRAYING