ODM Industrial Demineralized Water Equipment from China Suppliers - High-Quality Factory Solutions for Low Conductivity Water Factory, Suppliers
Product Description
Product Overview and Positioning
The industrial demineralized water equipment manufactured by Shanghai Tongjie Environmental Protection Technology Co., Ltd. adopts a combined process of "Pretreatment + Reverse Osmosis (RO) + Mixed Bed (MB) or Electrodeionization (EDI)" to perform deep demineralization of raw water, producing demineralized water with conductivity below 0.1 μS/cm.
The equipment operates on the principles of ion exchange and membrane separation, without the need for a heat source. The produced water quality meets the low salt content requirements of various industrial applications such as high-pressure boilers, electronics cleaning, and pharmaceutical preparation.
Process Flow and Principle
Raw water first passes through the pretreatment unit to remove suspended solids, residual chlorine, and some organic matter, then enters the Reverse Osmosis (RO) unit. The RO membrane is a polyamide composite membrane that, under an operating pressure of 1.0–1.8 MPa, removes more than 97% of dissolved salts, colloids, and microorganisms from the water.
- Mixed Bed (MB) Process: Uses a homogeneous mixture of cation and anion exchange resins. Residual ions are replaced with H⁺ and OH⁻ ions, producing water with resistivity up to 18 MΩ·cm.
- EDI Process: Utilizes selective permeability of ion exchange membranes and continuous electrical regeneration under a DC electric field. Produces resistivity consistently above 17 MΩ·cm without chemical regeneration.
Equipment Structure and Core Components
The system is a fully integrated solution consisting of:
- Pretreatment filters (Multimedia & Activated Carbon).
- RO membrane modules (Spiral-wound brackish water membranes).
- Mixed bed or EDI modules for deep demineralization.
- Chemical dosing and cleaning systems.
- PLC control cabinet for automated operation and monitoring.
Key Performance Indicators and Applicable Standards
Typical control parameters include:
Conductivity
MB: EDI:
Resistivity
MB: ≥ 18 MΩ·cm
EDI: ≥ 17 MΩ·cm
Silica Content
Controlled at ≤ 20 μg/L
(Boiler feed standards)
Compliance: Meets GB/T 12145 Quality standard of water and steam for thermal power plants.
Application Fields
This equipment is widely utilized across various high-demand industries:
- Power Industry: High-pressure boiler makeup water.
- Electronics: Ultrapure water pretreatment.
- Pharmaceutical: Purified water and water for injection.
- Chemical & Food: Process ingredients and reaction mediums.
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