Particulate - PM10, 2.5
Innovative and proven methods are required to economically and consistently meet fine particulate control operational and emission performance requirements. Stack exhaust test methodologies have been improved to allow for the quantification of particle size, in 1 micron increments, as well as the mass of both filterable and condensable components in each size fraction.
According to the EPA, sulfate is a significant fraction (ranging from 9-40%) of PM2.5 mass emissions on fossil fuel fired systems. The integration of an additional fine cleaning stage in a crude gas cleaning system to remove sulfates from the crude gas stream therefore increases the control efficiency of fine particles.
Higher cleaning efficiencies are required to meet these new standards. Lower air-to-cloth ratios are needed without drastically changing the physical footprint.
Condensable particulates, like organics, metallic fume, and acid gases, are controlled by chemical or physical adsorption in the exterior layers of the filter cake. The filter cake provides a bed for the sorbents to react and form chemical bonds with the additives. The bed structure creates a depth of physical contact sites for the particulate to impact, removing them from the gaseous exhaust stream.
The Luehr Filter system has a unique cleaning mechanism to maintain this filter cake depth, and maintain removal efficiencies with a low delta P.