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Peristaltic Metering Pump Solves Biological Build-up Challenge in Industrial Water Reuse Application

CHEM-FEED® Dual skid with FLEXFLO® peristaltic metering pumps is able to resolve water treatment challenges, such as those found at The Southern Power Stanton Energy Plant.

Southern Company’s Stanton Energy Center located in Orlando, FL

The CHEM-FEED® Dual Peristaltic Pump Engineered Skid System manufactured by Blue-White® Industries consists of two FLEXFLO® A3 peristaltic pumps, a calibration cylinder, and Plast-OMatic components (e.g., eight True Blue manual ball valves, two diaphragm check valves, a gauge with gauge guard, and a relief valve.) Skid Model Number: CFS-2AA-AAAXBA. Pump Model Number: A3V24-MNJ. 

LOCATION: An Energy Center located in Orlando, FL, is a natural gas-fueled, combined-cycle electric-generating unit with a capacity to generate 656 megawatts. The combined-cycle plant includes two natural gas-fired combustion turbines, two heat-recovery steam generators, and a steam turbine. 

APPLICATION: Injecting 12.5% Sodium Hypochlorite (250 – 300 GPD) into the reuse water to prevent biological build-up within the water tubes of the condenser. Any build-up within the condenser would greatly reduce the efficiency to produce steam, hence less mechanical power. In a condensing turbine, the thermal energy of steam is converted into mechanical power, which is converted into electric power by a generator. 

PREVIOUS METHOD: The Energy Center elected to implement the changeover from Chlorine gas to Sodium Hypochlorite due to cost-reducing measures. Maintaining the liquid gas on-site required the full-time support of an Emergency Management Team. Eliminating the EMT would reduce operating expenses. 

REASON FOR SELECTING THE PERISTALTIC PUMP TECHNOLOGY: The peristaltic pump has proven to be far superior to that of any diaphragm pump when injecting gaseous chemicals against moderate to low pressures. The peristaltic pump maintains a smooth, constant flow rate while eliminating the potential for a vapor lock. The diaphragm pump is adversely affected by off-gassing, hence the potential to lose prime. However, the peristaltic pump technology allows any excess gas build-up to be pumped through the tubing while maintaining a highly accurate and continual flow. 

REASON FOR SELECTING THE “CHEM-FEED” ENGINEERED SKID SYSTEM: The CHEM-FEED® Skid System is a quality engineered, compact, efficient design, incorporating high quality, proven FLEXFLO® peristaltic pump and Plast-O-Matic components that will maintain the integrity of the skid system’s performance. The skid encompasses a full chemical feed design that is less expensive and easy to install as opposed to purchasing the components separately and using an in-house engineering team to design and assemble. In addition, the dual pump CHEM-FEED® model offered an excellent option for an emergency backup in case downtime was required on the primary pump. Lastly, the local chemical feed skid manufacturers proposed outdated technology of a diaphragm pump-based skid system as well as using components that were far less inferior to the PlastO-Matic components used with the CHEM-FEED® System. 

RESULTS: The Energy Center is extremely pleased with the CHEM-FEED® performance since it has been installed. The ease of installation of a UPS-delivered chemical feed skid system was a remarkable feature, far exceeding their expectations. The CHEM-FEED® Skid System comprised of the A3 peristaltic pumps should expect to see a minimum of 7000 – 7500 hours of tube life based on previous applications with similar chemicals and pressure ranges of less the 20 PSI. 

a3 skid system stanton energy 2
a3 skid system stanton energy 3

Written By:
Amparo Burke
, Advertising

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