This equipment is specially in order to get rid of oil , gluey thing and solidsuspended substance in industry and municipal sewage and design, can separate these materials automatically from the waste water . The concave air of EVU whirlpool floats with the help of chemical flocculant, can reduce the content of BOD and COD in sewages greatly , make sewage disposal reach discharge standard , reduce blowdown is it spend to abolish, is it invest in province , operate expenses to be low to have , install advantage such as easy operations.