The rotary drum screens occupies a smaller area than other fine screens, but its processing effect is excellent and it is a very efficient grille. Because the rotary drum screens has been in contact with sewage, which is highly polluted and highly impurities. The composition of sewage can not be simple. Now there are many impurities in some sewage, and the drum grille is long-term operation, so the load is very heavy. 

Rotary drum screens is a new type of solid-liquid separation environmental protection equipment, which integrates three functions of grille, conveyor and screw press. The spiral fine grille machine can be installed directly in the canal or in the container box. Sewage flows into the front end of the grille basket of the spiral slender drum grille and flows out of the grille gap. The filter residue is intercepted in the grille basket. The filter residue accumulated on the grille of the drum-type fine grille machine forms a filter layer to further play a filtering role, thus improving the filtration efficiency of the screw-type fine grille machine filter residue.

When the water level difference between the front and the back of the grille basket reaches the set value, the deceleration motor starts automatically and drives the dregs rake to rotate. Its dregs clearing teeth extend between the grilles and take out all the dregs. When the rotary drum screens rotates to the vertical position, the dregs fall into the hopper in the center of the lower end of the screw and are transferred by the screw, and pressed at the same time. Finally, the dregs fall into the material box or the conveyor for external transportation. 

In order to clean up the filter residue on the teeth, the slag clearing rake can automatically reverse 15 degrees. After a slag clearing gear plate, the residual residue on the slag rake can be cleared automatically, so as to avoid the malfunction of the spiral drum. The filter residue of rotary drum screens is squeezed and dehydrated in the process of conveying, and the solid content can reach 35%-45%. The dry residue has small volume, less pollution and is easy to be transported abroad. http://khnwatertreatment.com/