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Manufacturer of STP, ETP, Industrial RO, Sewage treatment plant in noida, delhi call-9650608473
Sewage treatment plant in noida,ETP, Industrial RO delhi call-9650608473

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  • 91+ 9650608473
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What is mix bed in water treatment plant?  What is the mixed bed?  How do mixed beds work?  PDF What is mixed bed filter?

Mixed bed water treatment plant

Mixed bed resins, also referred to as mixed bed ion exchange resins, are primarily used in the water purification industry to polish process water in order to achieve demineralized water quality such as after a reverse osmosis system. As the name implies, a mixed bed is made up of strong acid cation exchange and strong base anion exchange resin.

The cation-exchange and anion-exchange resins are thoroughly mixed and contained in a mono pressure vessel in Mixed-Bed deionizers, Cation resin is regenerated with hydrochloric acid to produce deionized water (HCl). Because hydrogen (H+) is positively charged, it binds to the negatively charged resins.

A mixed-bed deionizer is equivalent to a long series of two-bed plants due to the dilution of cation-exchangers and anion-exchangers in a single column. Henceforth, the water quality produced by a mixed-bed deionizer is noticeably higher than that of a two-bed plant.

MIX BED PLANTS CONSISTS OF

  • 1. FRP, MSEP, MSRL, and SS Vessels as needed.
  • 2. There are manual, semi-automatic, and automatic features available.
  • 3. Automatic valves that operate pneumatically or electrically are available.
  • 4. Electrical cabinet and automatic control.
  • 5. Capacity of up to 50 m/h

WHAT ARE THE APPLICATIONS OF MB WATER TREATMENT?

  • 1. In power plants, turbine condensate is treated.
  • 2. Process condensate treatment is done in various industries.
  • 3. Ion exchange resins are often used to treat pre-demineralized water.
  • 4. Reverse osmosis permeates polishing of the water.
  • 5. Ultra-pure water production is done for the semi-conductor industry.
  • 6. Distillate of sea water polishing takes place.

HOW DO MIX BED WORKS?

Water enters the unit through the inlet distributor at the top of the vessel during the service cycle and is evenly distributed across the resin bed. Water's ionic contaminants are exchanged for H and OH ions on the resin beds as it flows through the resin bed. This process removes ionic contaminants from the water, resulting in highly purified Demineralized water. The treated water then flows through the false bottom under drain strainers to the outlet piping at the unit's bottom.

When the capacity of the unit is depleted, regeneration begins. The resin is backwashed and hydraulically classified based on densities, and regeneration is performed after the bed settles. Caustic Sodium hydroxide is introduced into the system via the down flow. The regenerate distributor is activated, and acid is introduced via the up-flow regenerate header. The interface collector collects and disposes of used acid and caustic. After removing regenerate acid and caustic with a slow rinse, the entire bed is rinsed with service water. The vessel is drained until the water level is just above the surface of the bed. After that, the resins are re-mixed with air. Before returning to unit, the vessel is refilled and the bed is rinsed.

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