To know the principle of oil-water separation cloth, one must first understand it. Oil water separation cloth is also equivalent to filtration, so the following will talk about the filtration principle of oil-water separation cloth, oil-water separation cloth filter material and filter aid!

1、 Principle of oil-water separation cloth filtration

(1) The basic concept of filter cloth for oil-water separation cloth is to use porous media to separate suspension. When the filter cloth is working, under the action of external forces, the liquid in the suspension flows out through the channel of the medium, and solid particles are intercepted to achieve separation. Generally speaking, the suspension to be filtered is called filter slurry; The porous medium used is called a filtering medium; The liquid passing through the medium channel is called filtrate; The retained solid is called filter cake or filter residue. The driving force of filtering operation is the pressure difference between the upstream and downstream of the filtering medium.

① Utilize the pressure head of the filter slurry itself;

② Apply pressure to the surface of the filter slurry;

③ Vacuum the downstream of the filtering medium;

④ Utilize inertial centrifugal force.

The oil-water separation cloth filtration operation can be divided into two categories according to its principle.

(1) The mesh size of the sieve analysis filter is smaller than the diameter of solid particles, and the suspended solid particles are removed by the sieve analysis function.

In the early stage of filtration, small particles flow out and the filtrate becomes turbid. As the filter cake layer forms and thickens, the filtrate gradually becomes clear. As the sieve holes gradually become clogged, the filtration speed decreases. After the formation of the filter cake layer, the filter cake layer undergoes sieving, and the filter material loses its sieving effect, only serving to support the filter cake layer, hence it is called filter cake layer filtration.

(2) Adsorption filtration (deep filtration): The mesh size of the filtering medium is greater than the diameter of the solid particles, and the solid particles are adsorbed on the surface of the medium after entering the pores.

In fact, in actual production, oil-water separation cloth filtration and adsorption work simultaneously. The adsorption filter medium intercepts larger particles, and the filter cake layer of the filtration filter medium can adsorb smaller particles.

Next, let's introduce the second point: how to choose oil-water separation cloth filter media and filter aids

2、 Oil water separation cloth filter material and filter aid

1. Filter material: The main function of filter material is to support the filter cake, which must have a porous structure, minimal mechanical strength and flow resistance, and corrosion resistance.

The commonly used oil-water separation cloth filter media include the following:

① Fabric media, such as industrial filter cloth, metal wire mesh, etc;

② Granular media, such as perlite powder, cellulose, diatomaceous earth, etc;

③ Solid boards, such as bleached wooden boards, synthetic fibers, etc;

④ A filtration membrane composed of cellulose and other polymers. The surface of the fabric is treated with granular media as a filter aid for coarse filtration; Solid cardboard medium is used for semi fine filtration and fine filtration; Membrane media are used for fine filtration and ultrafine powder filtration.

The above is the knowledge about oil-water separation cloth that I have introduced to you. If you need it, please contact us and we will be happy to serve you!