Pressure Leaf Filter Pre-coated Cake filtering working importance

Pressure Leaf Filter filtering function of pre-coated cake layer is simple but very important. The slurry filtration efficiency and accuracy largely affected by the filtering cakes. The filtration of the filter uses the filter cake formed on the filter leave screen when the filter slurry passes through the filter leave blades as a porous medium to achieve the purpose of separating the suspension. Therefore, the formation of the filter cake layer also called pre-coated filtering is crucial in the entire operation of the pressure leaf filter.

Pressure Leaf Filter Pre-coated Cake Layer Filtering formation

The Pressure Leaf Filter Pre-coated Cake Layer Filtering formation is divided into two stages. First, the filtering slurry fills the entire tank of the pressure leaf filters; second, the filter cake layer is formed. The filtering slurry fills the entire tank and is driven into the tank through a pump and a feed valve. As the filtering slurry is continuously pumped from the tank body, the air in the tank is squeezed to the top of the tank and discharged through the top drain valve. When the filtering slurry overflows from the pipeline through the drain valve, it indicates that the tank is filled with filtering slurry. At this time, adjust the valve to form a filter cake layer on the surface of the pressure leaf filter leave screen.

Pressure Leaf Filter Pre-coated Cake Layer and slag cake discharging

Pressure Leaf Filter Efficient Filtering Cycle

Pressure leaf filter mainly relies on the pre-coated filtering cake deposited on the filter screen as the filtering layer to filter the slurry. As filtration proceeds, the thickness of the filter cake layer on the filter leave screen increases, and the resistance of the filter cake to the filtrate passing through the pressure leaf filter increases, and the filter resistance in the tank also increases. The filtration cycle is generally 0.5 to 3.5 hours. When the pressure in the tank reaches 0.45MPa, the filter cake thickness can reach 10 to 25mm. Till this, the one filtration cycle is finished and will drain the slurry liquid, blow and dry the filtering cake, vibrate and remove the slag, and then proceed to the next cycle of pressure leaf filter solid liquid filtrations.

Pressure Leaf Filter Pre-coated Cake filtering working factory applications.

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