When the candle filter is mainly used for the clarification of liquids in the process of using, the auxiliary agent such as diatomaceous earth and activated carbon can be added directly in the slurry, so that the filtration rate is faster and the filtrate is more clarified. The precision of the candle filter can be selected from 1μm~300μm.
The candle filter is mainly used for its full hermetic operation. It is suitable for the filtration of general materials in the process of operation. It can also be used for dangerous products that are flammable, explosive, toxic or highly toxic and does not allow pollution when used. Filtration of delicious foods, biological products, and pharmaceuticals.
After the candle filter is in the later stage of filtration, the residual slurry at the bottom of the equipment cannot be returned to the slurry tank. In this case, the residual slurry at the bottom can be pumped out and then returned to the top of the filter cover at the top and pass through. The nozzle is evenly sprayed onto the filter tube, and the residual liquid is filtered out by the compressed gas input in the machine.
The candle filter can be directly used for the uniform cake layer formed during the re-filtration, so that the filter cake can be easily washed by passing the washing liquid into the machine. If the filter cake is washed by the top spraying method, the washing can be greatly saved. If a dry cake is obtained, air, hot air or steam, etc. are introduced into the machine after filtration or washing and filtering, so that they can be washed. Pass through the cake layer until the filter cake has reached the desired dryness, then depressurize the inside of the filter, and backflush the filter cake from the bottom.
One or more filter elements are arranged in the barrel of the candle filter, and a special filter cloth is selected on the filter core according to the characteristics of the raw material liquid. When the liquid passes through the filter cloth, solid substances in the liquid are gradually accumulated on the surface of the filter cloth. When a solid material reaches a certain thickness, a so-called “cake layer” is formed. Since the gap between the filter cake particles is small, the escape of the particulate impurities in the liquid is blocked, so that the filtrate becomes clear and the desired filtering effect is produced.