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A kind of treatment method of epoxy resin production wastewater

A technology for epoxy resin and waste water production, which is applied in natural water treatment, multi-stage water treatment, water/sewage treatment, etc. It can solve the problems of shortening the service life of the evaporator, reducing the evaporation efficiency, and complex salt components, etc., and achieves enhanced fen The effect of the treatment effect, the removal load is high, and the treatment effect is enhanced

Active Publication Date: 2020-08-14
武汉弘康本环保新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because there is no separation of the organic phase, and no impurity removal before and during concentration, the resulting salt has complex components and poor practicability. When concentrated, the evaporation efficiency will be reduced and the service life of the evaporator will be shortened.

Method used

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  • A kind of treatment method of epoxy resin production wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The COD in the epoxy resin production wastewater to be treated is 3200mg / L, and the TOC is 2200mg / L.

[0025] The epoxy resin wastewater to be treated is removed by the grid to remove the large suspended impurities; the treated wastewater enters the coagulation degreasing tank for degreasing treatment, and ferrous chloride 5ml / L is added during the treatment process, and mixed in the pipeline. Then enter the oil removal tank through the water inlet pipe in a tangential direction to react, the reaction time is 5 minutes, and the residence time is 2 hours; after treatment, xylene extractant is added to the waste water, and the organic phase of the upper layer is extracted and separated and returned to the resin production process for recycling; After the treatment, the wastewater enters the electrodialysis desalination system for desalination treatment. The electrodialysis uses a 0.5mm separator; after the treatment, the wastewater is firstly added with hydrochloric acid t...

Embodiment 2

[0027] The COD in the epoxy resin production wastewater to be treated is 2500mg / L, and the TOC is 1800mg / L.

[0028] The epoxy resin wastewater to be treated is removed through the grid to remove the large suspended impurities; the treated wastewater enters the coagulation degreasing tank for degreasing treatment. During the treatment process, ferrous sulfate 5ml / L is added, mixed in the pipeline, and then Enter the oil removal tank in a tangential direction through the water inlet pipe for reaction, the reaction time is 7 minutes, and the residence time is 3 hours; after treatment, xylene extractant is added to the waste water, and the organic phase of the upper layer is extracted and separated and returned to the resin production process for recycling; treatment After the wastewater enters the electrodialysis desalination system for desalination treatment, the electrodialysis uses a 0.5mm separator; after the treatment, the wastewater is firstly added with hydrochloric acid t...

Embodiment 3

[0030] The COD in the epoxy resin production wastewater to be treated is 1000mg / L, and the TOC is 500mg / L.

[0031] The epoxy resin wastewater to be treated is removed through the grid to remove the large suspended impurities; the treated wastewater enters the coagulation degreasing tank for degreasing treatment. During the treatment process, ferrous sulfate 5ml / L is added, mixed in the pipeline, and then Enter the oil removal tank through the water inlet pipe in a tangential direction for reaction, the reaction time is 5 minutes, and the residence time is 2 hours; after treatment, xylene extractant is added to the waste water, and the organic phase of the upper layer is extracted and separated and returned to the resin production process for recycling; treatment After the wastewater enters the electrodialysis desalination system for desalination treatment, the electrodialysis uses a 0.5mm separator; after the treatment, the wastewater is firstly added with hydrochloric acid to...

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Abstract

The invention belongs to the technical field of sewage water treating, and particularly relates to a treating method of epoxy resin generated waste water. The method comprises the steps that large suspended matter impurities in the epoxy resin generated waste water are removed by grilles, through the combination of physical and chemical methods of coagulation, extraction, electrodialysis desalination, fenton oxidation, flashing, decolorizing and refined filtration, salt water is directly recycled and reused after organics in high-salt waste water are removed, the cost is saved, and the treating method has the advantages of being low in energy consumption, high in removing loading, good in water quality of purified output water and the like.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and in particular relates to a treatment method for epoxy resin production wastewater. Background technique [0002] In recent years, my country's epoxy resin industry has developed rapidly, and at the same time, a large amount of high-salt organic wastewater is produced. This type of wastewater treatment is extremely difficult and has become a bottleneck restricting the sustainable development of the epoxy resin industry. Due to the existence of excess epichlorohydrin, excess sodium hydroxide and toluene, the composition of wastewater is complicated. The main components of impurities in wastewater are: toluene, aging resin, epoxy resin polymer suspension, glycerin, chloroglycerin, hydrogen Sodium oxide, xylene, sodium chloride, emulsifier, etc. [0003] At present, the domestic effective conventional treatment process of epoxy resin wastewater with high salt content and high organic m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/10C02F103/38
CPCC02F1/001C02F1/06C02F1/26C02F1/281C02F1/283C02F1/40C02F1/4693C02F1/5236C02F1/5281C02F1/66C02F1/722C02F9/00C02F2103/38C02F2301/08C02F2305/023C02F2305/026
Inventor 胡茂宅
Owner 武汉弘康本环保新材料有限公司
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