The hydraulic pressure clamping mechanism of the filter press consists of a hydraulic station, a cylinder, a piston, a piston rod and a hydraulic shaft of the Haveland card hydraulic pump connected to the pressure plate. The motor, the oil pump and the relief valve are adjusted. Directional valve, pressure gauge, oil circuit, fuel tank. When the hydraulic pressing machinery is pressed, the hydraulic station supplies high-pressure oil, and the component chamber formed by the cylinder and the piston is filled with oil. When the pressure is greater than the frictional resistance of the pressing plate, the pressing plate slowly presses the filter plate, when the pressure is pressed. When the tightening force reaches the pressure value set by the relief valve (displayed by the pressure gauge pointer), the filter plate, the filter frame (plate frame type) or the filter plate (box type) is pressed, and the relief valve begins to unload. When the motor power is cut off, the pressing action is completed. When retracting, the reversing valve is reversing, and the pressure oil enters the rod cavity of the cylinder. When the oil pressure can overcome the frictional resistance of the pressing plate, the pressing plate begins to retreat. When the hydraulic pressure is automatic pressure holding, the pressing force is controlled by the electric contact pressure gauge, and the upper limit pointer and the lower limit pointer of the pressure gauge are set to the values ​​required by the process. When the pressing force reaches the upper limit of the pressure gauge, the power supply When the oil pump stops, the oil pump stops supplying power. The pressure is reduced due to the internal leakage and external leakage that may occur in the oil circuit system. When the pressure is lowered to the lower limit of the pressure gauge, the power is turned on, the oil pump starts to supply oil, and when the pressure reaches the upper limit, the power is cut off. The oil pump stops supplying oil, and this cycle is used to achieve the effect of ensuring the pressing force during the process of filtering the material. Filtration method: The way the filtrate flows out is clear flow filtration and dark flow filtration. For the clear flow filtration, a water nozzle is arranged on the lower liquid outlet of each filter plate, and the filtrate flows out intuitively from the water nozzle. Under the dark flow filtration, a liquid outlet hole is arranged below each filter plate, and the liquid outlet holes of the plurality of filter plates are connected into a liquid outlet passage, which is discharged by a pipe connected by a liquid outlet hole below the thrust plate. Washing method: When the filter cake needs to be washed, it sometimes flows in one-way washing and two-way washing, undercurrent one-way washing and two-way washing. The clear flow one-way washing is that the washing liquid enters sequentially from the washing liquid inlet hole of the thrust plate, passes through the filter cloth and then passes through the filter cake, and flows out from the non-porous filter plate, and at this time, the liquid discharging nozzle of the orifice plate is closed. The outlet nozzle of the non-porous plate is open. The clear flow two-way washing is that the washing liquid is washed twice from the washing liquid inlet holes on both sides above the thrust plate, that is, the washing liquid is first washed from one side and then washed from the other side, and the outlet of the washing liquid is diagonal with the inlet. Direction, so it is called two-way cross washing. The dark flow unidirectional flow is that the washing liquid enters the perforated plate from the washing liquid inlet hole of the thrust plate, passes through the filter cloth and then passes through the filter cake, and flows out from the non-porous filter plate. The undercurrent two-way washing is that the washing liquid is washed twice from the two washing liquid inlet holes on both sides above the stopper plate, that is, the washing is first washed from one side and then washed from the other side, and the outlet of the washing liquid is diagonally oriented. So it is also called undercurrent two-way cross washing. Bathroom Accessories Set,Bathroom Accessories Hotel,Washroom Accessories Set,Toilet Accessories Set,Bathroom Faucet Accessories,Sanitary Wares Bathroom Accessories,Bathroom Accessories Black Yuyao Gaobao Sanitary Ware Factory , https://www.gurberry.com
The working principle of the filter press