Air Pollution ControlEquipments
Air pollution control equipment is used to regulate or negate various system emissions. It can be found in a wide range of manufacturing, processing, research and production facilities. In some cases, air cleaning and purifying systems are used to provide a healthy and contaminant-free work environment, while in others they are in place to prevent the escape of harmful chemicals, vapors or dust into the air.
Common varieties of air pollution control equipment include scrubbers, dust collectors, thermal oxidizers, cyclones, blowers, mist collectors, catalytic converters and electrostatic precipitators. The scrubber is perhaps one of the most well-known devices. Its function is to remove or neutralize harmful substance in an exhaust stream before they leave a given system. Typically, a scrubber infuses a new chemical or mixture into the problematic fumes. In the case of a wet scrubber, vaporized water is infused into the polluted substance and, once the resulting mixture condensed, the pollutants remain in the water while the rest of the gas escapes. Other scrubbers involve powdered lime and other materials, which react with acid and other harmful chemicals in the fumes, converting them into workable, pollution-free components. By contrast, an electrostatic precipitator uses a high-voltage electric charge combined with attractive plates to collect harmful materials.
Most car drivers should be familiar with catalytic converters. These devices are installed in automobile exhaust systems, and are now a standard feature in all North American commercial vehicles. They reduce engine emissions by oxidizing carbon monoxide and dangerous hydrocarbons to carbon dioxide and water, two normal components of the environment. They also convert nitrogen oxide to its component parts (nitrogen and oxygen). Catalytic converters use a platinum or platinum/rhodium catalysts to remove and reduce emissions. In addition to their use in automobiles, they serve as air pollution control equipment for numerous industries. Industrial units are much larger, and can handle a far greater volume of emissions.
Cyclones, a fairly widespread type of control equipment, spin polluted vapors at high-speeds. Gravity forces the heavier materials (the pollutants and dust) to the edge of the spinning vapors, where it is collected. The lighter, pollutant-free fumes are then released. These systems, along with a tremendous variety of other specialized or unique pollution control devices are in place at factories and production facilities around the world.