Demineralization (DM) Plant

Pure & Reliable Water Treatment

A Demineralization (DM) Plant is a proven water treatment system designed to remove dissolved salts, minerals, and impurities through ion exchange technology. DM plants produce high-purity water that is essential for applications requiring low conductivity and mineral-free water, such as boilers, pharmaceuticals, laboratories, and power plants.

 

Ralsonics offers custom-engineered DM Plants with advanced ion-exchange resins, robust construction, and user-friendly operation, ensuring consistent and reliable performance.

Types of DM Plants

 

1.) Two-Bed DM Plant

 

  • Consists of two separate vessels – one for cation exchange and one for anion exchange.
  • Produces water with conductivity in the range of 5–30 µS/cm.
  • Suitable for general industrial applications such as cooling towers and process water.

 

2.) Mixed Bed DM Plant

 

  • Contains both cation and anion resins in a single vessel.
  • Produces ultra-pure water with conductivity as low as 0.1–1 µS/cm.
  • Commonly used in pharmaceuticals, electronics, and power plants where high purity is critical.

 

3.) Automatic DM Plant

 

  • Equipped with PLC/SCADA systems for automatic operation and regeneration.
  • Ensures consistent performance, reduced human error, and easy monitoring.
  • Ideal for large-scale industries requiring continuous operation.

 

4.) Manual/Semi-Automatic DM Plant

 

  • Operated manually or semi-automatically with control valves.
  • Cost-effective and easy to maintain.
  • Best for small and medium industries with moderate water requirements.

How a DM Plant Works

A typical DM plant operates using ion exchange resins that replace dissolved ions with hydrogen (H⁺) and hydroxide (OH⁻) ions, which then combine to form pure water. The process involves:

 

  1. Cation Exchange – Removes positively charged ions (Ca²⁺, Mg²⁺, Na⁺, Fe²⁺) and replaces them with H⁺ ions.
  2. Anion Exchange – Removes negatively charged ions (Cl⁻, SO₄²⁻, NO₃⁻, HCO₃⁻) and replaces them with OH⁻ ions.
  3. Mixed Bed Polishing (optional) – Provides ultra-pure water by further reducing conductivity and silica.

Key Features of Ralsonics DM Plants

  • High-Capacity Ion Exchange Resins – Long life and superior performance.
  • Skid-Mounted Compact Design – Easy installation and mobility.
  • Automatic or Manual Operation – Options to suit different applications.
  • Low Conductivity Output – Achieves conductivity as low as 0.1 µS/cm.
  • Corrosion-Resistant Construction – SS/FRP/MSRL vessels available.
  • Efficient Regeneration – Reduced acid/alkali consumption.
  • User-Friendly Design – Simple controls and minimal operator training required.
  • Customizable Flow Rates – From laboratory scale to large industrial plants.

Advantages

  • Consistent High-Purity Water – Removes dissolved salts and minerals effectively.
  • Cost-Effective – Lower capital cost compared to RO for low TDS feed water.
  • High Efficiency – Produces water suitable for critical industrial applications.
  • Scalable Solutions – Available in small, medium, and large capacities.
  • Durable & Reliable – Long resin life and robust plant design.
  • Flexible Operation – Manual, semi-automatic, or fully automatic options.

Application

  • Power Plants – Boiler feed water and turbine operation.
  • Pharmaceuticals – High-purity water for formulations and cleaning.
  • Electronics & Semiconductor – Ultra-pure water for sensitive processes.
  • Laboratories & Research Institutes – Water for testing and analysis.
  • Chemical & Fertilizer Plants – Process water with low ionic content.
  • Food & Beverage Industry – Ingredient water and process water.

Technical Specifications (Typical Range – Customizable)

Parameter Specification

Flow Rate

100 LPH – 50,000+ LPH

Conductivity of Output

≤ 0.1 – 1 µS/cm

pH of Treated Water

Neutral (6.5 – 7.5)

Material of Construction

FRP / MSRL / SS 304 / SS 316

Resin Type

Strong Acid Cation (SAC), Strong Base Anion (SBA), Mixed Bed (MB)

Operation

Manual / Semi-Automatic / PLC-SCADA

Regeneration

Acid (HCl/H₂SO₄) & Alkali (NaOH)

Optional Add-ons

Degasser, Activated Carbon Filter, Mixed Bed Polisher

Why Choose Ralsonics DM Plants?

  • Decades of expertise in water treatment technology.
  • Custom-engineered systems for diverse industries and applications.
  • Reliable, durable, and efficient performance.
  • Compliance with global water quality standards.
  • Proven installations across pharmaceuticals, power, food, and electronics sectors.

“FAQs”

FAQ Accordion
Q1. What is the difference between RO and DM Plants?

RO plants use membranes to remove salts, while DM plants use ion exchange resins. RO is ideal for high TDS feed water, while DM is best for low to medium TDS water.

Q2. How often should the resins be regenerated?

Regeneration frequency depends on feed water quality and plant capacity but typically occurs after 8–12 hours of operation.

Q3. What is the lifespan of DM resins?

Resins generally last 3–5 years with proper regeneration and maintenance.

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