Above Ground Storage Tanks
Above Ground Storage Tanks (ASTs) at terminals, refineries, and tank farms require periodic inspection or maintenance for various reasons. Maintenance includes cleaning out the sludge at the bottom of a tank, fixing a leak or inspecting the tank for problems. In addition, tank farms have frequent changes of products in the tanks.
Tanks must be defueled and cleared of fuel vapors prior to maintenance, repair, or inspection to prevent fires or explosions when work is performed on or in the tank. Current emission control devices for removing the VOCs from the storage tanks include:
- Stack Flares
- Thermal Oxidizers (TO)
- Power washing with surfactants and other chemicals and a TO
- Internal Combustion Engines (ICE machines)
These methods for degassing are time consuming, costly, produces different pollutants and are potentially unhealthy and dangerous. Air purging is typically used to remove fuel vapors from the tank but this process is often time consuming (days to weeks) and unpredictable. NanoVapor’s ST-1000 Vapor Suppression System is a faster, safer, greener and more cost effective alternative to these methods.