Mechanical Collectors are particulate mater control devices that use gravity settling inertia, dry impaction processes to collect pollutants. Mechanical collectors are reasonably tolerant of high dust loadings. Cyclones force incoming gas streams to abruptly change direction in tight, spiral pattern. Large Particulars entering with the gas stream cannot turn with the gas because of their momentum (or inertia). As a result, these particulars "break out" of the gas stream and hit the wall of the cyclone. The particles then fall down the wall and collected in hopper.