The leaf filter is a highly efficient, environmentally friendly and energy-saving filtering equipment. It is a product specially developed for some special-purpose applications. It has a particularly high cost performance for those occasions where the clear liquid and filtered solid components need to be recovered. The conventional product is a jacket design, which can meet the requirements of constant temperature filtration process for materials with special requirements on temperature. The bottom slag discharge is controlled by the cylinder, which not only ensures the product quality and safety, but also ensures the safety of the operators, especially for those materials that are harmful to the human body. In order to ensure the purity of the product, the completely recovered product is generally directly filtered by the filter plate without adding any filter aid. For materials with higher viscosity and the filter residue is not recovered, you can use filter aid to filter to increase flow. With its simple form, the leaf filter brings customers a convenient sense of operation. From appearance to operation, it has become an ideal choice in the filtration industry, and it also greatly reduces labor and material costs.
The filtering principle of leaf filter:
1. Used for solid-liquid separation of dirty liquids such as machine-pressed crude oil. The filter pump pumps the filtrate into the tank through the liquid inlet pipe and overflows. Under the action of pressure, the solid impurities in the filtrate are added to the filtrate. The filter screen intercepts and forms a filter cake on the filter screen. The filtrate passes through the filter screen and enters the outlet pipe and flows out of the tank through the filter nozzle to obtain a clear filtrate.
As the filtering time of the leaf filter increases, more and more solid impurities are trapped on the filter screen, which increases the thickness of the filter cake from time to time. This increases the filtering resistance and the pressure in the tank. When the pressure rises to a certain value When it is necessary to discharge the slag, stop the input of the filtrate into the irrigation and blow the compressed air into the tank through the overflow pipe, and the hydraulic pressure in the tank to be filtrated into other containers, and the filter cake is blown dry. Turn off the compressed air, turn on the butterfly valve, start the vibrator, vibrate the filter leaf, shake off the filter cake on the filter screen and discharge it through the slag discharge port under the tank.
2. As a clear filter for the liquid after the preliminary solid-liquid separation, the stainless steel filter blade is used to support and adsorb diatomaceous earth and other filter aids in the sealed casing of the filter tank. After the filter aid is mixed with the material in the mixing tank, it is circulated by the conveying pump to form a stable filter cake layer on the filter screen, that is, stop the diatomite pre-coating.
After pre-coating, start to filter. The small filter aid particles can provide countless micro channels, trap suspended debris, only allow clear liquids to pass, and add filter aids such as diatomaceous earth from time to time during the filtration process. In order to form a new filter layer, the filter cake will not be blocked, so that the material will stop the essential filtering through the filter cake layer, remove its impurities, flow into the inner cavity of the filter leaf of the leaf filter, and then flow out of the clear through the liquid outlet pipe. liquid. In addition, if decolorization is required during filtration, a certain percentage of activated carbon must be added.