Working Principle of Automatic Slag Discharge Filter

The gear oil pump or centrifugal pump pumps the mixed liquid mixed by the decolorization pot or stirring tank through the pipeline into the decolorization filter tank and fills it up. Under the thrust of the pump, the filter material with large particles (such as white clay, Diatomite, activated carbon, etc.) are firstly trapped on the surface of the filter to form a filter cake layer. Under the action of the filter cake layer, the fine particles of white clay are trapped to form countless fine channels, and then finer suspended matter is retained. Allow the clear liquid to pass through, and start to filter at this time. During the filtration process, new mixed liquid is continuously pumped in to form a new filter cake layer, so that the filter cake will not be blocked, so that the material will pass through the filter cake layer for substantial With permanent filtration, the clear liquid flows through the inner channel of the screen to the oil outlet pipe through the oil nozzle, and flows to the finished product tank through the pipeline under the thrust of the pump.

Filter Slag Discharge Process

As the amount of mixed liquid filtered increases, the filter cake layer becomes thicker, the filter resistance increases, and the pressure in the tank rises. When the pressure gauge on the upper part of the filter shows 0.4Mpa, stop sending the mixed liquid into the filter tank. , turn on the air compressor, input air into the filter tank through the overflow port through the pipeline, under the action of air pressure, the oil in the filter cake is gradually pressed out, and returns to the decolorization pot or stirring tank through the pipeline, after about 30 minutes , the filter cake is pressed dry, stop inputting air into the filter, when the upper pressure gauge shows 0, open the butterfly valve, start the vibrating body, start slag discharge, when the slag is discharged, close the butterfly valve and all valves, start Next round of filtering. 

The special filter for decolorization is mainly composed of a lifting frame, a tank body, a stainless steel screen, a vibrating slag discharge device, a butterfly valve, and a transport bracket.