They remove particulate matter found in smoke, vapors, dust or mists. The filters remove particles from exhaust gases, leaving the particles on the filter while the cleaner air passes through. The dust cake falls into a hopper for disposal or reuse in the industrial process.
Filter bags hang in a sturdy house.
Sometimes the house is insulated when cleaning hot gases to prevent corrosive moisture or acid mists from condensing and harming the equipment. Sometimes dozens, even hundreds of cylindrical filters, each eight to 40 feet long may hang in a series of houses at one location. Filters are made of woven cotton, wool or synthetic materials. Some synthetic materials can withstand high temperatures or are resistant to chemical reaction. Each baghouse must meet the needs of the particular industry process.