Maintenance of Vacuum Belt Filter during Shutdown

If the internal energy of the filtrate in the vacuum belt filter machine increases, the liquid must also exert pressure on the filter plate. If the filter plate cannot withstand this pressure, the filtrate will inevitably leak through the gaps in the filter plate, greatly reducing the original internal energy of the filtrate. Therefore, the equipment needs to provide pressure to the filter plate, which must be greater than the adverse force of the filtrate on the filter plate, ensuring that the filtrate has high internal energy, thus improving the filtration effect. The higher the pressure provided to the filter plate by the equipment, the higher the internal pressure of the filtrate that the equipment can filter, and the higher the working efficiency of the equipment.

The mesh size of the filter cloth is too small: The mesh size is an important parameter for the diaphragm filter press, indicating the size of the filtering holes in the filter cloth. When the mesh size is smaller, and the filtering holes are larger than the solids that need to be intercepted, many solid particles will pass through the filter cloth normally, resulting in the liquid still being turbid after filtration. The plate frame of the plate and frame filter press forms the filtering chamber of the equipment. When the number of plate frames does not meet the specifications, it will severely affect the working efficiency and results of the equipment.

The filter material of the belt vacuum filter can be replaced by itself, but what kind of filtering medium should be selected to enable the box filter press to exert a strong filtering effect? Before selecting a suitable filtering medium, we need to know what kind of filtering medium we have and what characteristics it possesses.

The filtering mechanism of the belt vacuum filter: There are two main types of fluid filtering mechanisms.

One is based on the size of the particles, such as retention, screening, and surface retention; the other is adsorption, where particles adhere to the filter under chemical/electrical charge effects. This requires pharmaceutical companies to choose different filter membranes based on actual needs. Characteristics of vacuum filtration fluid: Related to fluid characteristics. For example, the viscosity and chemical/ionic components of the fluid. The higher the viscosity of the fluid, the slower the flow rate under the same pressure, the more contact the fluid has with the membrane, and the better the filtration effect of the vacuum filter. For example, the impact of the mixing/contact time of the fluid and the membrane on the filtration effect is greater; the longer the mixing/contact time, the better the filtration effect. Additionally, it should be noted that the characteristics of the fluid only affect the adsorption and retention effect of the membrane on the fluid, not the removal of particle size. The operating conditions of the vacuum filter are related to the actual operating conditions, such as the flow rate of the particles and the filtration pressure.

We need to regularly maintain the machine so that we can work more efficiently.

The filter is a device for removing a small amount of solid particles from the liquid. When the fluid enters a filter element of a certain specification, its impurities are blocked, while the clean filtrate is discharged from the filtering port. When cleaning is needed, twist the plug to the bottom of the pipe to drain the liquid, remove the flange cover, take out the filter element, and then reinstall the filter element. It is well known that the core component of the filter is the filter membrane, which is prepared on a microporous support layer (support layer) filled with more micropores. The materials used to make the filter membrane include many materials, which are divided into organic membranes (such as polymer hollow fiber membranes) and inorganic membranes (such as ceramic membranes). Membrane filtration machines have high filtration accuracy, controlled particle size, and easy recovery of backwashing functions. Therefore, the use and maintenance are very convenient.

For the filter cloth of small plate frame filter presses, a common characteristic is that it is insoluble in water and can be penetrated by water.

Due to the incorrect installation of the self-priming pump device, users need to fix the self-priming pump on a bracket welded with triangular iron. Because the triangular iron frame is too simple, only a small number of self-priming pump bases contact the triangular iron, the method is incorrect. The correct method is to remove the wooden strips and fix the pump on a hard, flat surface.

Misalignment of the rewinding machine or other rollers may also lead to misalignment and wrinkling. This misalignment is displayed as a diagonal deviation of the filter cloth zipper. By adding balance weights to the sliding adjustment block of the tensioning wheel, the tension on the dragging side of the filter cloth is reduced, shortening the travel distance of the dragging side of the filter cloth, thus correcting this phenomenon. This issue can also be caused by misalignment of the filter cloth support rollers, and all filter cloth support rollers should be checked for alignment with the frame. During any such adjustment, the filter cloth should be kept in the center of the filter and should not stand for at least half an hour. Many filter cloths are prone to shrinkage after being moistened, and the filter cloth may be either too narrow or much larger than the size used. Before making any significant adjustments to the calibration, the filter cloth should stabilize for a period.

Without the filter plate, the plate frame filter press cannot operate.