In order to solve the environmental pollution caused by the open-type filter and increase the dryness of the filter cake, we developed a completely pressure-tight. The pressure-tight filter is placed some candle tubes, which is suitable for different occasions. Because there is no actuator device, and its structure is simple, so it is suitable for a operating condition of large filtration area. The filter device is fully automatic operation, no any leakage.
The filter element adopts a structure design of double plum blossom tube bank (internal stainless steel skeleton and external filter cloth). The middle drainage tube can help to drain the liquid in the filter tube, and, the remaining liquid can be drained away by the middle bleeder tube, and, the filter cake is blown off by back flushing of clean gas, its efficiency is obviously higher than other filter. The filter is suitable for the filtration of impurity content of 0.1% to 50%.
Operating Principle
When the candle filter is start to its filtering process, the slurry is fed into the filter by the pump. The
liquid phase in the slurry passes through the filter medium and enters into the center of multi-hole filter
element, and is discharged from the outlet of the clear liquid. Before the cake layer is formed, the relatively clean liquid is sent to the inlet of raw material slurry again to do a filtration process, until the filter cake layer is formed (or meet the requirements), and then, the control system will give a signal to stopping the recycle filtration. The clean liquid will be sent to next process through the control valve and execute the normal filtration process.