Lvyuan water filter element manufacturer explains the principle of water filter element in detail

In many fields, water filtration is a very important link, so the role of water filter is particularly important. So, what is the principle of the water filter element? The Lvyuan water filter element manufacturer introduces the principle of the water filter element in detail. 1. The filtration principle and operation method of water treatment. The quality of raw water is very complicated, and a series of filtration steps are needed to get the required water quality, so the filtration process of water treatment is necessary. Filtration is the use of a porous medium to separate the suspension. When working, under the action of external force, the liquid in the suspension flows out through the pores of the medium, and the solid particles are intercepted, thereby realizing separation. Generally, the suspension to be filtered is called the filter slurry; the porous medium used is called the filter medium; the liquid passing through the pores of the medium is called the filtrate; the retained solid is called the filter cake or filter residue. 2. The driving force of the filtration operation is the pressure difference between the upstream and downstream sides of the filter medium. There are several ways to generate the pressure difference: ①Using the pressure head of the filter slurry; ②Pressing on the surface of the filter slurry; ③In the filter medium Vacuum on the downstream side; ④Using inertial centrifugal force. Filtration operations can be divided into two categories according to the principle of action: 1. Sieve analysis filtration: The pore size of the filter medium is smaller than the diameter of the solid particles, and the solid particles are removed from the suspension by the sieve analysis. In the initial stage of sieve filtration, fine particles flow out, and the filtrate is relatively turbid. With the formation and thickening of the cake layer, the filtrate gradually becomes clear. Due to the gradual blockage of the sieve holes, the filtration rate is in a decreasing trend. During the filtration process, when the filter cake layer is formed, the sieving effect is produced by the cake layer, and the filter medium loses the sieving effect and only plays the role of supporting the cake layer, which is called cake layer filtration. 2. Adsorption filtration: The mesh of the filter medium is larger than the diameter of the solid particles, and the solid particles are absorbed by the surface of the medium after entering the pores of the filter medium. In actual production, sieve analysis and adsorption work simultaneously, and the adsorption filter medium retains larger particles; the sieve filter medium cake layer can adsorb smaller particles.

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