Belt vacuum filter

الوصف

 vacuum filter is one of the oldest filters used in the industrial liquid-solids separation. It offers a wide range of industrial processing flow sheets and provides a flexible application of dewatering, washing and/or clarification.
A vacuum filter consists of a large rotating drum covered by a cloth. The drum is suspended on an axial over a trough containing liquid/solids slurry with approximately ****0% of the screen area immersed in the slurry.
As the drum rotates into and out of the trough, the slurry is sucked on the surface of the cloth and rotated out of the liquid/solids suspension as a cake. When the cake is rotating out, it is dewatered in the dying zone. The cake is dry because the vacuum drum is continuously sucking the cake and taking the water out of it. At the final step of the separation, the cake is discharged as solids products and the drum rotates continuously to another separation cycle.
Application
As a basic separation operation, rotary vacuum drum filter is used in a wide range of applications: dewatering slurries of food, pulp, pharmaceutical and chemical, applications of metallurgical and the treatment of waste water
Advantages
1.The rotary vacuum drum filter is a continuous and automatic operation, so the operating cost is low.
2.The variation of the drum speed rotating can be used to control the cake thickness.
3.The process can be easily modified (pre-coating filter process).
Can produce relatively clean product by adding a showering device.