Filter press equipment is mainly used to dehydrate and separate liquids and solids in aggregate and mineral processing applications. The common ones are belt filter presses and recessed plate filter presses. This post will introduce the main differences between belt and recessed plate filter presses.
Belt Filter Presses
The belt filter press is also called a sludge dewatering machine. It is a device used to separate solids and liquids in the sludge and can run continuously for 24 hours.
The belt filter press does not need to use a buffer tank. It usually requires the use of chemical flocculants to agglomerate the fine solid particles in the slurry into larger particles, so that the slurry can be drained more easily. Therefore, the belt filter press uses a large amount of chemical flocculants, and the moisture content of the mud cake will be higher than that of the recessed plate filter press.
The initial investment of the belt filter press may be less, but the later maintenance and chemical use costs will gradually increase.
Recessed Plate Filter Presses
The recessed plate filter press is used to dehydrate the mud into a “dry” cake material that is easy to handle, and it is more used in sand washing plants.
Since the polypropylene filter plates are empty, the recessed plate filter press needs a buffer tank to collect the mud. When the mud material is completely captured by the filter plate, a very high dehydration pressure can be applied to the mud, and a mud cake with a lower moisture content can be obtained.
The recessed plate filter press usually does not need any chemical additives to help dehydration, and it saves chemicals.
The input cost is very low, because it does not require full-time operators or chemical additives, and requires less maintenance.