Process for treating wastewater generated in neopentyl glycol production

A neopentyl glycol and wastewater treatment technology, applied in natural water treatment, water/sewage multi-stage treatment, water/sludge/sewage treatment, etc., can solve the problem of low microbial treatment efficiency, affecting microbial treatment, and microbial inability to survive and other problems, to achieve the effect of low comprehensive treatment cost, reduced infrastructure costs, and less dosage

Inactive Publication Date: 2011-09-21
TAISHAN SPORTS IND GRP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the amount of wastewater produced during the production of neopentyl glycol is not very large, it has become a relatively serious source of pollution because it contains a large amount of organic pollutants
Serious threats to river water bodies
Although most of the neopentyl glycol factories in my country have treated the sewage produced by them to varying degrees, there is no relevant report on the effective and low-cost solution to the pollution of neopentyl glycol wastewater.
[0003] Moreover, because the formaldehyde in the wastewater exceeds the standard, microorganisms cannot survive. In the prior art, catalyst methods such as calcium oxide or porous materials are often used to remove formaldehyde in the pretreatment of neopentyl glycol wastewater. The amount of formaldehyde can be reduced, but the removal still affects the follow-up. Microbial treatment, at the same time, the concentration of organic matter in neopentyl glycol wastewater is high, and the nutrient substance is single, so the efficiency of microbial treatment is not high and not ideal

Method used

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  • Process for treating wastewater generated in neopentyl glycol production
  • Process for treating wastewater generated in neopentyl glycol production
  • Process for treating wastewater generated in neopentyl glycol production

Examples

Experimental program
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Embodiment 1

[0025] Project implementation, sewage system operation, wastewater treatment process for neopentyl glycol production:

[0026] The neopentyl glycol wastewater first enters the aeration regulating tank, and the wastewater is homogeneously adjusted by the air stirring system installed in the tank, and then lifted to the cooling tower by the pump to remove most of the formaldehyde in the wastewater. The specific requirements for steam blowing : Inlet water temperature 40~50℃, counter-flow FRP cooling tower, power: 4.0KW.

[0027] The water from the cooling tower is then electrolyzed and chemical agents are used to remove the residual formaldehyde in the wastewater, so that the concentration of formaldehyde in the wastewater is reduced to below 3mg / L. The specific requirements of the electrolytic cell: electrolytic DC voltage: 36V, residence time: 1h, distance between electrode plates: 300mm ; The chemical agent is a mixture of hydrogen peroxide and ferrous sulfate, dosage: hydrog...

Embodiment 2

[0031] Wastewater treatment process for neopentyl glycol production:

[0032] The neopentyl glycol wastewater first enters the aeration regulating tank, and the wastewater is homogeneously adjusted by the air stirring system installed in the tank, and then lifted to the cooling tower by the pump to remove most of the formaldehyde in the wastewater. The specific requirements for steam blowing : Inlet water temperature 40~50℃, counter-flow FRP cooling tower, power: 4.0KW.

[0033] The water from the cooling tower is then electrolyzed and chemical agents are used to remove the residual formaldehyde in the wastewater, so that the concentration of formaldehyde in the wastewater is reduced to below 3mg / L. The specific requirements of the electrolytic cell: electrolytic DC voltage: 36V, residence time: 1h, distance between electrode plates: 300mm ; The chemical agent is a mixture of hydrogen peroxide and ferrous sulfate, dosage: hydrogen peroxide: 150mg / L, ferrous sulfate: 60mg / L, re...

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Abstract

The invention relates to a process for treating wastewater generated in neopentyl glycol production. The process comprises the following steps of: removing a formaldehyde component from the wastewater generated in neopentyl glycol production by combining steam stripping, electrolysis and chemical reaction, so that the concentration of the formaldehyde in the wastewater is reduced to below 3mg / L; adding nutritive salt into the wastewater generated in neopentyl glycol production and subjected to formaldehyde removal to complement nutrients for the wastewater; and removing organic pollutants and the like from the sewage by using microbes attached to the surface of a combined biological filler through a biological contact oxidation tank process. The process has the characteristics of low comprehensive treatment cost, high efficiency and good treatment effect.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to a wastewater treatment process for neopentyl glycol production, and belongs to the technical field of environmental protection. Background technique [0002] As an organic raw material, neopentyl glycol (Neopentyl glycol, NPG) is mainly used in the production of saturated polyester resins, unsaturated polyester resins, polyester polyols and esters and polymers used in synthetic lubricants. , plasticizers and alkyd resins, etc. Although the amount of wastewater produced during the production of neopentyl glycol is not very large, it has become a relatively serious source of pollution because it contains a large amount of organic pollutants. pose a serious threat to river water bodies. Although most of the neopentyl glycol factories in my country have treated their wastewater to varying degrees, there is no relevant report on the effective and low-cost solution to the problem of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/36
Inventor 张瑞林吕伟杜春水周永辉刘璇刘雷
Owner TAISHAN SPORTS IND GRP
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