Because of heavy pollution, high density dust and large area, pant cleaning is a challenge. In the industry of steel, nonferrous metals and metallurgy, the dust are heavy, adhesive and thick. And in the field of coal, thermal power and coking, the dust are adhesive, tiny and dust flying. The dust in the cement enterprise are adhesive, tiny, dust flying and harden. It is very difficult to cleaning these plants with normal sweeper. Plant cleaning is the requirement of environmental protection and image presentation of the company.