Mixed Bed Units
Mixed-bed deionizers are normally used to —polish— the water to higher levels of purity after it has been initially treated by either a two-bed deionizer or a reverse osmosis unit. In mixed-bed deionizers the Strong Acid Cation and Strong Base Anion resins are closely mixed and contained in a single pressure vessel.
The thorough mixture of resins in a single column makes a mixed-bed deionizer equivalent to an extended series of two-bed plants. As a result, the water quality obtained from a mixed-bed deionizer is appreciably higher than that produced by a two-bed plant.
We at Shubham, provides broad range of custom-built Mixed Bed Units for high purity industrial process water & utility applications. Our exclusive design of Mixed Bed plant ensures the maximum utilization of the High bed depth, effective surface area, uniform space and linear velocity across the resin bed, which provides effective contact time between water and resin bed yield high purity water for sensitive process application i.e. WFI (water for Injection) High Pressure Boilers, EC circuits etc.
Shubham MB Plants are available in diameters from 0.225 Mts. to 2.0 Mts. with the flow rates up to 150M3/Hr. and OBR up to 1500 M3@40 PPM TDS. These strong, pre-engineered, pre-assembled units minimize installation and start-up costs. Our Mixed Bed Units are acclaimed in the market for cost efficiency and consistent functioning.
Working Principle
A mixed bed exchange has both cation and anion resin mixed together in a single vessel. As water flows through the resin bed, the ion exchange process is repeated many times, —polishing— the water to a very high purity. During regeneration, the resin is separated into distinct cation and anion fractions by back washing. Regenerate acid is introduced through the bottom distributor, and caustic is introduced through distributors above the resin bed. The regenerate streams meet at the boundary between the cation and anion resin and discharge through a collector located at the resin interface. Following regeneration, air and water are used to mix the resins, and the unit is ready for service.
Technical Specification
| Flow | 0.5M3/Hr. — 150 M3/Hr. |
| OBR | 1500 m3 |
| Inlet conductivity | Up to 70 micro siemens / cm |
| Outlet conductivity | <1 micro siemens / cm |
| Silica at outlet | Max 0.05 ppm as CaC03 |
| Total Hardness | NIL |
| Liner Velocity | 4 to 80 M/Hr. |
| Space Velocity | 4 to 60 M/Hr. |
| Type of Resin | Strong Acid Cation (H+ — Mono Type) : Strong Base Anion (OH+ — Mono Type) |
| Type of Regenerant | HCL / H2So4 for SAC & NaOH for SBA. |
| Diameter (Vertical Vessel) | 0.225 Mts. — 2.0 Mts. |
| Height of Shell | 2.4 Mts. |
| MOC | FRP / Mid Steel / Stainless Steel |
| Coating / lining | Epoxy / FRP / Rubber Lined |
| Design Code | ASME / IS |
| Design Pressure | Up to 10 Bar |
| Working Pressure | 1.1 to 3.5 Bar |
| Clear Pressure Drop | 0.3 bar |
| Top distribution system | Strainer Plate |
| Bottom distribution system | Strainer plate |
| MOC of Regenerant Tank | FRP/HDPE/MSRL |
| Mixing Element | Agitator/Aeration |
Salient Features
- MOC — FRP / MSRL / MSEP
- Ion exchange Vessels
- Cation Resin of reputed make
- Automatic / Semiautomatic
- 12 auto valves & High quality CPVC piping
- PLC based control panel
Benefits
- Rinse water requirements are very low
- Water purity very high
- Low Maintenance
- Leak proof
Application
- High Pressure Boiler Feed
- Water for Injection (WFI)
- EC circuits
- Laboratories & R&D Centers