Low-concentration pvb wastewater treatment equipment based on ion exchange

Abstract

The invention discloses ion exchange-based low-concentration PVB wastewater treatment equipment, which is used for processing wastewater in an impounding reservoir and discharging the processed water into a dilute water recycling pool. The low-concentration PVB wastewater treatment equipment comprises a sand filter tank, a cation bed, a carbon remover, an anion bed, a macroporous resin column and an activated carbon filter, wherein a water inlet of the sand filter tank is the water inlet of the low-concentration PVB wastewater treatment equipment; a water outlet of the sand filter tank is orderly connected with the cation bed, the carbon remover, the anion bed, the macroporous resin column and the activated carbon filter; and the water outlet of the activated carbon filter is the water outlet of the low-concentration PVC wastewater treatment equipment. Sand filtering, anion and cation exchange and macroporous resin adsorption are combined together, efficient treatment of the low-concentration PVB wastewater is achieved, the effluent characteristics achieve the standard, the processed dilute water can be reused after being desalted, and reduction of the operating cost is facilitated. The overall equipment is free of wastewater emission, no poisonous and harmful solid wastes are discharged outside, and environmental protection is facilitated.

Description

technical field [0001] The invention relates to a PVB wastewater treatment device, in particular to a low-concentration PVB wastewater treatment device based on ion exchange. Background technique [0002] Polyvinyl butyral, referred to as PVB for short, is a condensation product of polyvinyl alcohol and butyraldehyde under the catalysis of hydrochloric acid. During the PVB production process, a large amount of PVB rinse water will be produced, and its wastewater contains butyraldehyde and polyvinyl butyral. Aldehyde, polyvinyl alcohol, chloride ion, hydrogen ion, complex composition, low pH value. It is difficult to meet the standard by simply using biological methods or physical and chemical methods, and the treatment cost is high and it is not easy to popularize. There are few researches on this wastewater treatment process at home and abroad, and there is no low-concentration PVB wastewater treatment equipment that can solve this problem well. Contents of the invention...

AI Technical Summary

Problems solved by technology

It is difficult to meet the standard by simply using biological methods or physical and chemical methods, and the treatment cost is high and it is not easy to promote

There are few studies on this wastewater treatment process at home and abroad, and there is no low-concentration PVB wastewater treatment equipment that can solve this problem well.

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