In a filter press, the solid-liquid separation machine is the filter press itself. A filter press is a batch operation equipment used for separating solids from liquids in various industries such as wastewater treatment, mining, chemical processing, pharmaceuticals, and food production.

Here's how a filter press works:

Filling: The mixture of solid and liquid (called slurry) is pumped into the filter press chambers.

Filtration: The slurry passes through a series of filter plates that are covered with filter cloths. The filter cloths allow the liquid to pass through while trapping the solid particles.

Formation of Filter Cake: As the slurry passes through the filter plates, the solid particles accumulate on the filter cloths, forming a layer of solid material called the filter cake.

Dewatering: Pressure is applied to the filter plates to squeeze out the remaining liquid from the filter cake. This process helps in dewatering the solid material and reducing the moisture content.

Cake Discharge: Once dewatered, the filter cake is removed from the filter press chambers, typically by opening the press and manually or mechanically discharging the cake.

Cleaning and Repeating: The filter press is then cleaned, and the cycle can be repeated for the next batch of slurry.

Filter presses come in various sizes and configurations, including manual, semi-automatic, and fully automatic models. The choice of filter press depends on factors such as the volume of slurry to be processed, the desired level of automation, and the characteristics of the solid and liquid being separated.