System controls - Automatic
Automatic Controller is the brain of the RO system. It allows automatic operation of the RO system, and provides important trouble shooting data through LED lights or HMI interface. ForeverPure® reverse osmosis systems use only the highest quality and most reliable supplier.
Standard PLC program provides start/stop, sequential, and alarm control.
RO System start permissible conditions:
- Power On
- Start button pushed
- Low pressure switch closed
- Permeate water tank level below low level (low and high level switches are on open position)
Five conditions will cause the RO to shut down the machine:
- High working pressure,
- Low inlet pressure (<20 psi)
- Starter overload trip
- Product water storage tank level high
- Emergency shut-down button pushed.
- Low Feed Pressure Shut Off with indicator light
- High pressure shut-off switch
- Product Water and raw water Tank level control
- System On switch with light
- Power On switch with light
Feed Water Booster Pump (customer supplied)
Delivers feed water to RO plant at 40~50 psi at required feed water flow rate.
Material : 316 stainless steel.
Acid Dosing System
The most effective way to prevent calcium carbonate scale formation is to lower the feed water pH via the injection of an acid. The acid will convert bicarbonate ion into carbon dioxide.
One metering injection systems will be supplied for controlling different elements in the feed water of the RO plant. The metering pump will allow controlling of different functions such as the stroke length and percentage rate. The Chemical Dosing System prevents membrane from scaling.
Antiscalant Dosing System
One metering injection systems is supplied to inject antiscalant into the feed water stream. The metering pump pumping rate can be adjusted by varying the stroke length and percentage rate.The Antiscalant Dosing System prevents the membrane from scaling.
Multimedia filter is designed to make better use if the bed depth in the removal of a greater volume of suspended solids. This is achieved by loading larger media granules of lower density at the top of the bed, with at least one layer of smaller media granules of higher density below it. The larger granules remove the larger suspended particles, leaving the smaller particles to be filtered by the finer media.
Depth multi-media filtration system is used to filter sand and sediment (turbidity) down to approximately 20 Microns. Automatically backwashes when filter is clogged. Saves replacement filter cost. Corrosion resistant, high performance composite & fiberglass tank will be used to hold the media. 16"x65", 1. No.
Chlorine Dosing System
One metering injection systems is supplied to inject liquid chlorine into the product water stream. The metering pump pumping rate can be adjusted by varying the stroke length and percentage rate. The Chlorine Dosing System sterilizes product water and ensures product water safety, and allows water to be safely distributed.
pH adjustment System
One metering injection system is supplied for the controlling of pH level of the product water. The metering pump pumping rate can be adjusted by varying the stroke length and percentage rate. The pH adjustment system adjusts product water pH by injecting caustics into the product water to raise product water pH.
Membrane Cleaning and Flushing Systems:
Permeate Water Flush
The Permeate Water Flush function purges the salt water out of the system by pumping permeate water into the membrane housing before each shut down and before every startup. By having permeate water during the shut down period, high salinity water would not permeate into the product water side. This maintains product water quality and extends the membrane life time.
High Product Water TDS Diversion With Alarm
If the product water TDS rises above a preset value, then the system will trigger an alarm and divert the unqualified product water into the drain. This function ensures only product water that is within the present TDS range is delivered to the user.