A De-Mineralised (DM) Water Plant is a water purification system designed to remove dissolved minerals and salts from water. It typically uses ion exchange, reverse osmosis (RO), or electro-deionization (EDI) to produce high-purity water, which is essential for industries like pharmaceuticals, power plants, electronics manufacturing, and laboratories.
Key Components of a DM Water Plant
- Raw Water Treatment
- Sand and activated carbon filters remove suspended solids, organic matter, and chlorine.
- Ion Exchange System
- Cation Exchange Resin: Removes positive ions (Ca²⁺, Mg²⁺, Na⁺) by replacing them with H⁺ ions.
- Anion Exchange Resin: Removes negative ions (Cl⁻, SO₄²⁻, NO₃⁻) by replacing them with OH⁻ ions.
- The H⁺ and OH⁻ ions combine to form pure H₂O.
- Reverse Osmosis (RO) System (Optional)
- Reduces dissolved solids before ion exchange to extend resin life.
- Electro-Deionization (EDI) (Optional)
- Uses electricity to remove ions without chemicals, producing ultra-pure water.
- Storage & Distribution
- DM water is stored in stainless steel or plastic tanks to avoid contamination.
Applications of DM Water
- Boilers & Power Plants (Prevents scaling and corrosion)
- Pharmaceuticals (Used in medicine and IV solutions)
- Electronics & Semiconductor Manufacturing
- Automobile & Battery Industry
- Laboratories & Chemical Processing
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