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Xihua filter cloth mainly includes: polyester filter cloth, polypropylene filter cloth, nylon filter cloth, Vinylon filter cloth. Filter cloth material performance: acid resistance, alkali resistance. Good wear resistance, corrosion resistance, recovery, conductivity is very poor. Polyester fiber temperature resistance is generally 130-- 150℃, the product has the advantages of ordinary felt filter, and wear resistance is very good, has a high cost performance and become the largest use of felt filter material variety. Filter cloth mainly used for filtering chemical industry filter cloth, sewage treatment plant, steel plant dust removal, thermal power plant dust removal, cement plant dust removal and various environmental protection industry filter dust removal, printing industry; Automotive glass printing, silk floral printing, electronic circuit board printing, ceramic printing.
What is the filtration principle of the filter cloth
The basic concept of the filter cloth is to use a porous medium to separate the suspension. When the filter cloth is operating, under the action of external force, the liquid in the suspension flows out through the channel of the medium to intercept the solid particles, so as to achieve separation. Generally speaking, the suspension to be filtered is called filter mud; The porous medium used is called the filter medium; The liquid through the medium channel is called the filter fluid; The solids intercepted are called filter cake or filter residue.
The driving force of filtration operation is the pressure difference between the filter material upstream and downstream. Choose the following methods to produce pressure difference:
1. Use the pressure head of the filter pulp itself;
2. Pressure on the surface of the filter pulp;
3. Vacuum in the downstream of the filter medium;
4. Use inertial centrifugal force.
Filtering operations can be divided into two categories based on their principles.
(1) sieve analysis filter filter medium pores smaller than the diameter of solid particles, depends on the sieve analysis function to remove suspended solid particles.
At the initial stage of filtration, fine particles flow out and the filtrate is cloudy. As the cake layer forms and thickens, the filtrate gradually becomes clear. As the sieve gradually clogs, the filtration rate decreases. When the filter cake layer is formed, the filter cake layer is screened, and the filter media loses the screening function and only plays the role of supporting the filter cake layer, so it is called the filter cake layer filtration.
(2) adsorption filtration (depth filtration) : the mesh number of the filtration 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 pore.
In practice, filtration and adsorption function at the same time. The adsorption filter medium intercepts larger particles, and the filter cake layer of the filter medium can absorb smaller particles.
Changzhou Xiahua Environmental Protection Technology Co., Ltd. specializes in the production and operation of industrial filtration materials for many years, mainly in the chemical industry, and the products are exported to many countries. Xiahua mainly produces the filter cloth, filter bag, pressure filter bag, etc., Xiahua filter cloth, use heart!