What is the Working Principle of a Ceramic Vacuum Filter?
July 18, 2025
A ceramic vacuum filter utilizes micro-porous ceramic filter discs and vacuum pressure technology for solid-liquid separation and slurry dewatering. The working principle involves several key steps:
Slurry Enters the Filtration System
First, the slurry is delivered to the ceramic vacuum filter through pipelines. The slurry is evenly distributed over the surface of the ceramic filter discs, preparing for filtration. Depending on the characteristics and flow rate of the slurry, the system automatically adjusts the slurry feed to ensure optimal filtration.
Vacuum Pressure Draws Liquids
The combination of micro-porous ceramic filter discs and vacuum pressure is the core of the ceramic vacuum filter. During the filtration process, a vacuum pump extracts air from the filter discs, creating a vacuum environment. This vacuum pressure forces the water in the slurry to pass through the micro-pores of the ceramic filter discs. Solid particles are retained on the surface of the ceramic discs, forming a filter cake.
Solid Particles are Captured
As the slurry moves across the ceramic filter discs, solid particles are unable to pass through the micro-pores and are retained on the surface of the discs. These particles gradually accumulate, forming a filter cake. The thickness of the filter cake increases as the filtration continues until the filtration cycle is complete.
Filtrate Discharge and Filter Cake Removal
Once the water in the slurry is fully filtered, the clear filtrate flows through the filter discs and is collected. At this point, the filter cake has formed on the surface of the ceramic discs and needs to be removed by the automatic discharge mechanism. After removal, the system begins a new filtration cycle.
Automatic Cleaning of Filter Discs
To maintain filtration efficiency, the ceramic vacuum filter automatically cleans the filter discs at the end of each filtration cycle. The cleaning system uses reverse water flow or air pressure to remove solid residues from the ceramic discs, ensuring smooth operation for the next filtration cycle.
