INTRODUCTION

Purified water production facilities
As the uses for water have diversified alongside industrial development, facilities for the manufacture of high purity water required in various industrial organizations and combined heat & power plants are designed in consideration of water quality and economic feasibility.

 

Treatment process chart

Size of particles separated in each membrane separation process

MICRO FILTRATION (MF)

Used in the membrane separation process of separating solutes with a size of 0.1 to 10㎛, or to remove suspended solids, sediments, and turbidity dissolved in the water, and performs the role of restraining water quality change.

ULTRA FILTRATION (UF)

Used in the semiconductor, pharmaceutical, and food industries for the membrane separation process of separating solutes with a size of 0.1 to 10㎛, separation of purified water used in semiconductor plants, and concentration of effective drug ingredients in pharmaceutical factories.

DEGASIFIER

Primarily removes CO2 gas to refrain the generation of scale in the piping

CO2 gas is discharged from water drops to the ambient air to achieve the equilibrium concentration as shown in the figure below when high concentration CO2 gas flows in the degassing tower and makes contact with the air (Henry’s Law). As CO2 gas can be discharged more easily when the water temperature rises, temperature control, HCO3- removal, enhancement of EDI treated water quality, and the prevention of calcium carbonate scale by using the heat exchanger become possible. Coolant, N2 gas, and separation membrane are used.

REVERSE OSMOSIS (RO)

This uses reverse osmosis to separate water from the salt solution by applying hydraulic pressure to the high concentrated solution when separating two solutions with different concentrations by using a semi-permeable membrane. It is able to remove 99.9% of organic and inorganic matter in the unfiltered water.

Electric Dialysis Instrument (EDI)

Electric deionization device for production of purified and highly purified water

1. 1. Ion removal
   Ion-removed purified water is obtained from the chamber as only anions pass through the anion exchange membrane and only cations pass through the cation exchange membrane.
2. 2. Cation exchange membrane
   Selectively filters cations in an electrostatical manner as it features a cation activator.
3. 3. Anion exchange membrane
   Selectively filters anions in an electrostatical manner as it features an anion activator.
4. 4. Ion exchange resin
   Performs the role of reducing electrical resistance as it acts as a medium that increases the movement speed of ions in the electrode direction.
5. 5. DC power supply: Induces the flow of ions in the electrode direction.

Electric Dialysis Instrument (EDI)

• Easy to operate and manage thanks to its simple structure. Unmanned operation through a fully automated system is possible.
• Ensures targeted water quality control.
• Requires less installation space and operating costs.

Applications

Combined heat & power plants, electronic industry, pharmaceutical industry