ABSTRACT
Air pollution control should be considered in terms of both the total technological system and ecological consequences. In effect, the air pollution control devices can remove both particulate matter and gases from effluent gas streams. Water sprays can be injected into the gas stream; gas can be forced to pass through sheets or films of liquid; or, the gas can move through beds of plastic spheres covered with liquid. Therefore, for systems of nearly equivalent power inputs, the collection efficiencies should be nearly equivalent. In view of the multitude of complex and often ambiguous pollution control regulations, it is in the best interest of the prospective user to work closely with regulatory officials as early as possible in the process. When felted fabrics are used, this dust cake is minimal or almost nonexistent, and the primary filtering mechanisms are a combination of inertial forces, impingement, and so on, on the fabric.
