Defluorination and heavy metal removal water treatment syste

DAWT·2022-05-09

Introduction

Groundwater and drinking water defluorination equipment (defluorination filter) introduces new technologies, new processes and new devices, and uses special activated alumina as defluorination adsorbent. The defluorination process is combined with acid or the pH value of raw water is adjusted and adsorbed and catalyzed , to obtain high adsorption performance for fluorine, the fluorine removal device uses aluminum sulfate or sodium hydroxide as the regenerating agent, adopts large-flow circulation regeneration, and quickly neutralizes it. It can maximize the recovery of the adsorption performance of activated alumina, so as to achieve the continuous process of defluorination. Special defluorination material is used as adsorbent, and the tank is made of carbon steel or glass fiber reinforced plastic. Using aluminum sulfate or sodium hydroxide solution with a concentration of 1%-2% as a regeneration agent, the filter material can be reused. It is a new type of fluorine removal equipment different from deionization methods (electrodialyzer, reverse osmosis).

Working principle

When the raw water flows through the fluoride remover and the inner core filter layer of the fluoride reducer - the natural mineral filter material, the water contacts the natural mineral filter material in the fluoride removal and fluoride reducer, and through physical and chemical reactions - adsorption, Ion exchange, the fluoride ion in the water is adsorbed and exchanged by the filter material, and the fluoride ion in the water is removed, so that the fluorine content in the water reaches the national drinking water hygiene standard (GB5749-2006) within 1.0 mg/L. After a period of operation, the natural mineral filter material is saturated with adsorption and exchange, and needs to be regenerated by a regeneration system. After regeneration, the performance of the filter material is restored to the original, and can be used repeatedly for a long time. The regenerant can be potassium aluminum sulfate (alum).