No water pumps are typically required. We ask for a minimum of 30 PSI water at the elevation of fog application. DSI can supply water pumps and storage tanks if required.
Yes, Dry Fog is often the only practical solution for Dump Pockets. We fill the pocket with fog prior to the dump and continue the fog output through the duration of the dump cycle. At PRB Coal Rollover Rail dumps we have achieved reductions in excess of 96%! DSI can evaluate the feasibility of controlling dust from your dump pocket.
Fog systems when properly designed and applied can meet or exceed all air quality standards. The EPA now specifies fogging systems as Best Demonstrated Technology for Sub-bituminous coal. In Wyoming, fogging systems are considered B.A.C.T. (Best Available Control Technology) for conveyors transporting PRB Coal, giving it a Zero Visible Emission Rating. At Rollover Rail Car Dumpers for PRB Coal, DSI has achieved reductions of over 96% as reported in Power Magazine .
Yes, Dry Fog is the system of choice and is Best Demonstrated Technology for sub-bituminous western coals like PRB Coal. It used for other hydrophobic materials such as pet coke and fly ash. We make water droplets the same size as the airborne particles overcoming any surface tension issues. The Colorado School of Mines reported their research on the how droplet size effects dust suppression in a 1976 issue of Coal Age Magazine .
It is true fog just like nature makes. Meaning the majority of droplets are between 1 & 10 microns in diameter. The importance of small droplets is there ability to impact and agglomerate airborne dust particles so the process material stays dry.