Chemical industry pure water ultrapure water system

DAWT·2022-05-09

System Introduction

Ultrapure water equipment in the chemical industry is mainly used in battery solvent water, chemical analysis, chemical materials, product cleaning, material separation, concentration, purification, waste recycling and other occasions. The water quality requirements are relatively not too high, pure water The conductivity can basically meet the requirements from 0.1uS/cm-20uS/cm. The ultrapure water equipment used in the chemical industry generally uses reverse osmosis as pretreatment and is equipped with an electrodeionization (EDI) device, which is currently the most economical to produce ultrapure water. The ultrapure water equipment used in the chemical industry is also the most environmentally friendly ultrapure water. The water preparation process can continuously produce ultrapure water without regeneration with acid and alkali. The ultrapure water equipment used in the chemical industry is not destructive to the environment. The disadvantage is that the initial investment is too expensive compared to the above two methods.

Process flow

1. Using ion exchange method:

Raw water→raw water pressure pump→multi-media filter→active carbon filter→water softener→precision filter→cation resin filter bed→anion resin filter bed→anion and cation resin mixed bed→microporous filtration → water point

2. Adopt secondary reverse osmosis method:

Raw water→raw water pressure pump→multi-media filter→activated carbon filter→water softener→precision filter→first stage reverse osmosis→PH adjustment→intermediate water tank→second stage reverse osmosis (reverse osmosis The membrane surface is positively charged)→pure water tank→pure water pump→microporous filter→water point

3. Using EDI:

Raw water→raw water pressure pump→multi-media filter→active carbon filter→water softener→precision filter→first stage reverse osmosis→intermediate water tank→intermediate water pump→EDI system→microporous Filter →Water point