The working principle of a Full Automatic High Pressure Diaphragm Filter Press can be explained as follows:

1. Preparation: The slurry or suspension is prepared by mixing solid particles with a liquid. The mixture is then fed into the filter press.

2. Filtration Setup: The filter press consists of a series of vertical plates with filter cloths or membranes and a diaphragm system. Each plate is coated with the filter cloth or membrane to form a filtration chamber when stacked together.

3. Filling: The slurry is pumped into the filtration chambers, filling the space between the plates. The diaphragm is initially in a closed position, separating the feed chamber from the filtrate outlet.

4. Pressurization: Once the filtration chamber is filled, the diaphragm is pressurized using a pneumatic or hydraulic system. This pressure applies force on the slurry, separating the liquid component (filtrate) from the solid particles.

5. Filtration: Under the applied pressure, the liquid component passes through the filter cloth or membrane, while the solid particles are retained in the filtration chamber. The filtrate flows through the outlet ports and is collected for further processing or disposal.

6. De-Pressurization: After the filtration process is complete, the diaphragm is de-pressurized, allowing the filter press plates to separate. This opens up the filtration chambers for cake discharge.

7. Cake Discharge: The solid particles that have formed a filter cake are removed from the filtration chambers. The filter cake can be manually extracted or discharged using an automatic cake discharge mechanism, depending on the specific design of the filter press.

8. Cleaning or Maintenance: After the filter cake is discharged, the filter cloths or membranes may need to be cleaned or replaced to maintain their filtration efficiency for subsequent filtration cycles.

The Full Automatic High Pressure Diaphragm Filter Press offers advantages such as precise pressure control, efficient separation of solids and liquids, and reduced manual intervention. It is particularly suitable for applications where high pressures are required for dewatering and where automation is desired for continuous operation.