The filter area of a plate and frame filter press consists of filter plates and filter frames that are alternately arranged to form a set of filter chambers. The surface of the filter plate has grooves, and its protrusions support the filter cloth. The filter frame and the corners of the filter plate have through holes, which form a complete channel after assembly, and can enter the suspension, wash water and guide the filtrate. The handles on both sides of the plate and frame are supported on the beam, and the plate and frame are pressed by the pressing device. The filter cloth between the plate and the frame is used as a gasket. The suspension pressure is introduced into the filter chamber by a feed pump, and filter residues are formed on the filter cloth until the filter chamber is filled. The filtrate passed through the filter cloth, and flowed along the groove of the filter plate to the corner channel of the plate frame, and was discharged. After the filtration is completed, the filter residue can be washed with washing water. After cleaning, compressed air is sometimes introduced to remove residual cleaning fluid. Then turn on the filter press to remove the filter residue, clean the filter cloth, re-press the plate, frame and start the next work cycle.
The hydraulic system of the plate and frame filter press. When it comes to the hydraulic system of the plate and frame filter press, the notable part of the seal is the hydraulic device. Because the hydraulic device uses a double-cylinder and screw extension structure, if there is a slight problem with the double-cylinder piston seal, or the gap between the screw arm and the bottom nozzle is 1 mm, the sealing effect of the hydraulic system will be reduced, which will not only A large amount of hydraulic oil overflow will also cause insufficient pressure generated by the hydraulic system, affecting the operation of the entire equipment.
Plate and frame filter presses are used to separate solids and liquids. Compared with other solid-liquid separation equipment, the filter cake filtered by the filter press has a higher solid content and excellent separation effect. The basic principle of solid-liquid separation is that the mixed liquid flows through the filter medium (filter cloth), the solids stay on the filter cloth, and gradually accumulate on the filter cloth to form a filter cake. The filtrate partially permeated through the filter cloth and became a solid-free supernatant.
The filter room of the plate and frame filter press, I believe that as long as people who have seen the horizontal filter press, they will know the extremely important part of the plate and frame filter press-the filter room, which is an independent filter plate. Put the filter cloth in the middle, and then the equipment provides strong pressure to make them enter the filter chamber. It is mainly responsible for filtration and separation. When working, the interior is full of filtrate, and its internal energy is still high. If the space in the filter chamber is small, it cannot be sealed, which is sufficient to cause insufficient internal pressure in the filter chamber. High, resulting in the filtrate cannot flow according to the normal filtration path, thereby affecting the efficiency and quality of the equipment. In addition, the continuous infiltration of the filter fluid from an unsealed place not only reduces the working quality of the equipment, but also increases the uselessness of the equipment, resulting in waste of equipment. Therefore, it is necessary to make the filter room sealed, so that the filter press equipment can work normally.