Applications


SANILEC® systems take full advantage of our knowledge and experience in the design of offshore skid-mounted units, with strenuous area classification requirements. These systems generate sodium hypochlorite from seawater using an extensively field-proven electrochemical process suited for biofouling control in water flood, cooling water and fire water loops. SANILEC systems are also designed for industrial power and coastal biofouling control applications.

Fire Water Systems
For use on Pump Caisson and Loop Antifouling
Biofouling, when mussels and algae restrict the intake to firewater and jockey pumps, must be considered by offshore facilities using seawater for their firewater systems so that these restrictions in flow do not compromise the performance of the vital safety equipment. Severn Trent De Nora offers skid-mounted systems that provide a shock dose of sodium hypochlorite at set intervals to the firewater pump caisson and a continuous does of sodium hypochlorite to the jockey pump caisson. This shock dose keeps the firewater pump caissons clean and free from macrofouling while also ensuring the firewater main loop is algae and slim free.

Cooling Water
For use on Vessels, Oil & Gas Facilities and Seachest
In applications where seawater is used for cooling, biofouling or the build up of marine growth reduces the system efficiency, increases the frequency of system maintenance and decreases the life of process equipment. Severn Trent De Nora offers a skid-mounted system that receives pressurized seawater and produces sodium hypochlorite at a concentration of 40 to 1660 ppm that can then be injected, at any point, within the vessel to control marine growth. The product can be varied 0 to 100 percent to maintain the desired residual.

For use at Power Plants
Open-loop seawater cooling is a widely-accepted practice for providing cooling water to a power plant. Cooling towers are typically used when the distance from the sea to the power plant is so great that the cost of pumping is prohibitive. Seawater is used for make-up water. Sodium hypochlorite is injected at the intake structure and the intake basin to control biological growth.

For use at Coastal or Inland Thermal Power Stations
Coastal or inland thermal power stations powered by nuclear energy or fossil fuel typically use seawater as a coolant in steam condensers. Controlling the fouling of the steam condensers in once-through cooling water systems can greatly increase the efficiency of power generation. Sodium hypochlorite is introduced into seawater intake of a power station to prevent fouling of the mechanical equipment, such as the seawater circulating pumps, bar screens and drum screens of the power station.

Water Flood Systems
For use on Oil and Gas Product
In a typical water flood package sodium hypochlorite is used to restrict marine growth in the seachest, condenser, heat exchanger and downhole. Reduced marine growth in the condenser and heat exchanger can increase efficiency and significantly reduce the requirement for maintenance. Sodium hypochlorite injected with the seawater in downhole applications can prevent slime and marine growth in the oil bearing substrate.

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