We have already mentioned some principles about various equipments of filter presses. We have further deepened the working principle of plate and frame filter presses today.

The plate and frame filter press is the most ideal filter press type for suspension solid and liquid separation . It is light, flexible and reliable. Moreover, the operation is convenient, the operation is more stable, and the use period is longer. This model has a clear flow and an undercurrent. To obtain a slightly dry filter cake, compressed air can be introduced into the filter press to drain the filter cake, making the filter residue drier. Below we will further explain the structure and working principle of the plate and frame filter press .

For each frame filter press configuration of the filter frame, filter cloth, filter plate and the filter pressing parts (hand wheel, jack) frame member pressing screw type manual mode S, J is a manual hydraulic jacks type. Each hole of the thrust plate end is a feed hole, a washing liquid hole, a filtrate discharge liquid collecting hole, a washing liquid discharge liquid collecting hole, and the like. Install the tubing according to the type of filter press you have chosen . The hydraulic compression plate and frame filter press consists of a filter chamber , hydraulic components and electrical parts. It is now occupying a large share of the plate and frame filter press, is the main type of promotion and use of the filter press in the future, and is the most promising of all filter presses.

  The filter chamber is formed by the patchwork dependence of the filter plate and the filter plate, and the interaction between the filter press and the filter cloth achieves the purpose of separating the solid solution. The filter chamber of the current filter press is generally composed of 10 to 20 filter plates, in which a filter cloth is placed. The filter chamber is placed on two beams, and the two ends of the filter chamber are respectively fixed on the two sides of the thrust plate and the hydraulic cylinder block to form a frame. The thrust is provided by the hydraulic device, so that the hydraulic cylinder piston drives the front and rear movement, and the filter frame and the filter plate are pressed to provide a high pressure environment for filtering. When the hydraulic working pressure is reached, the hydraulic unit will automatically turn off the power .

Today's filter presses generally use a hydraulic pressure-applying structure, which we will consider. The hydraulic system is the source of pressure for the hydraulic filter press. The hydraulic components consist of hydraulic accessories (tank and oil filter), hydraulic pumps, valves, hydraulic cylinders and piping. The electric motor drives the oil pump, and the pressure oil enters the hydraulic cylinder through the electromagnetic valve; the piston is pushed to complete the pressing and loosening process of the filter chamber. This is the basic principle of all hydraulics.
Plate and frame filter press operation

When the mixed liquid enters the filter chamber of the filter press from the inlet of the filter press, when the filter chamber is kept at a constant pressure, the solid will remain on the filter cloth after the mixed liquid enters the filter cloth layer of the filter chamber. The natural liquid will penetrate under the action of high pressure and will be discharged outside the device through the diversion of the discharge conduit. When the filter residue of the filter chamber is pushed too much, the filter press will automatically close the inlet valve, introduce gas into the filter chamber, discharge the moisture of the filter residue and compress the filter residue. Make it drier. After the filter residue is discharged, the above process is repeated.