Pristine Water - Model PCP Series -Concentric Tubular Electrode System

The seawater flows through the annular space between the outer and inner tubes. The flow is horizontal and at a higher velocity. The seawater that flows inside the tubes does not encounter any sharp corners or gaps or areas of low flow, which would otherwise induce deposition of calcium or magnesium salts resulting in the formation of scales.

Sodium Hypochlorite is a strong disinfectant that kills all the pathogens which lead to water borne diseases like cholera, typhoid, paratyphoid etc. Our system also leaves some residual Sodium Hypochlorite in water to prevent bacteria from getting picked up during storage or redistribution.

Seawater Booster Pump
These pumps are required if inlet seawater is not provided at a pressure of at least 2 kg/cm3. These pumps are normally made up of Duplex Stainless Steel. Working and stand by pumps are provided with inlet and outlet valves, check valves and required instruments.

Auto Backwash Strainers
The mechanical cleaning of the circulating water is performed by Automatic Backwash Strainers. The strainers can remove suspended solids of a particle size larger than 0.5 mm and be automatically self-cleaning. The strainers are complete with interconnecting pipe work, isolating valves, pressure gauges and automatic backwash equipment. The operation of the strainers will be controlled by a differential pressure switch. One strainer will be on stand-by.

Transformer/Rectifiers
The Transformer Rectifier controlled power supply will be self-cooling. These can either be Air cooled, Seawater cooled or Oil cooled and fitted with rectifiers of either Thyristors or Diodes. The output of the hypochlorite from each generator is directly proportional to the direct current (D.C.) output of the power supply. The Transformer/Rectifiers are provided with control panels for local and/or remote control and monitoring.

Acid Cleaning Unit
Acid Cleaning system is provided with Acid tank that will hold diluted Hydrochloric Acid. HC! dosing pump pumps the diluted acid through the Electrolyzer to remove the deposits of Calcium and Magnesium salts. The tank is designed to hold enough acid for one complete operation.

Hypochlorite Degassing cum Storage Tanks
The hypochlorite solution flows to the sodium hypochlorite degassing cum storage tank. The tanks are made of fiberglass. The storage capacity shall be sufficient to cover the shock dosing requirement. The necessary level switches are provided, for high level alarm, level switch for switching on/off the hypochlorite generator, low level switch which will, in case of being triggered, interrupt the continuous hypochlorite injection and will stop the shock dosing pumps.

Two sets of (100%) fresh air blowers are installed next to the tank to blow air into the tank to blow out the entrapped Hydrogen. As an added safety precaution, Auto switchover of the Blower occurs in the event of the operating blower tripping. Open Top Tanks do not need Blowers.

Dosing System for Continuous Chlorination and Shock Chlorination
Normally, two continuous dosing pumps are provided, for continuous flow of hypochlorite solution to the dosing point. Most of the time a set of Shock Dosing pumps are provided to meet the demand of biofouling control. While the continuous pumps dose hypo solution at a lower rate, the shock dosing pumps dose a higher rate of the solution but for a shorter time.

Instrumentation and Control
Pressure Gauges, Pressure Switches, Flow Meters, Temperature Controllers, Level Switches, Level Controllers, Hydrogen Detectors etc., are provided in the system to monitor the operation of the chlorine production. Output from all the instruments are connected to a Control Panel to properly control and monitor the operation. These Control Panels are either Relay based or PLC based. PLC based system have an interface with the plant DCS through SCADA.

Piping and Valves
Normally PVC or CPVC pipes are used in Sodium Hypochlorite Generation Systems, with PVC or CPVC Valves and fittings. These items are not only resistant to corrosion but easy to fabricate and erect.

• Low in maintenance
• No acid cleaning or washing
• Full capacity output
• Easy production adjustments

We offer capacities ranging from 0.5 kg/hr to 100 kgs/hr in modular design. Larger capacities can be designed as per customer specifications.

We, at Pristine Water along with our associate company Ti Anode also undertake the refurbishment of old Electrolyzers.

• Off shore & On shore water disinfection
• Algae removal in Cooling Towers especially where sea water is being used as input
• Sodium Hypochlorite generators for Ballast tank applications
• Algae removal from Fire Water especially where sea water is being used as input
• Water disinfection in the sea water intake fore bay
• Thermal Power Plant
• Desalination Plants