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Wenzhou Yuanao Fluid Equipment Technology Co., Ltd
Process principle of stainless steel filter cartridge filter
Date: 2025-04-29Read: 3
The process principle of stainless steel filter cartridge is mainly based on its structural design and filtration mechanism, which can be divided into the following core steps:
1、 Structure composition and basic filtering process
1. Multi layer filtering structure
The equipment consists of a housing, filter element, backwash mechanism, differential pressure controller, etc. The filter element is usually made of stainless steel fiber sintered felt or woven mesh material, with regular or irregular pore structure, used to intercept impurities of different particle sizes.
The liquid enters the lower chamber of the shell through the inlet, and impurities are intercepted when passing through the pores of the filter element. The clean liquid then passes through the pores into the upper chamber and is discharged from the outlet.
2. Staged filtering mechanism
Combination of coarse and fine filtration: Some models of filters first intercept large particle impurities through a coarse filter screen, and then undergo deep purification through a fine filter screen.
Differential pressure drive: Impurities accumulate on the inner surface of the filter element to form a filter layer, and the backwash program is triggered when the internal and external pressure difference reaches the preset value.
2、 Core filtering mechanism
1. Physical interception function
Surface interception: The woven mesh filter directly blocks particles larger than the pore size through the mesh, which belongs to surface filtration.
Deep adsorption: The sintered fiber filter element adsorbs tiny particles inside through a complex pore structure, achieving deep filtration.
2. Dynamic filtering effect
Inertial collision: Large particles in high-speed fluids are captured by the inertial impact on the surface of the filter element.
Diffusion effect: Micron sized particles are affected by Brownian motion and randomly move to the fiber surface for adsorption.
Electrostatic adsorption: Specially treated filter cartridges with static electricity can attract dust particles with opposite charges.
3、 Filter regeneration and maintenance process
1. Automatic backwashing technology
When the pressure difference reaches the threshold, the cleaning valve opens, and negative pressure is formed by the pressure difference between the filter cartridge and the suction pipe. The suction cleaner thoroughly cleans the inner surface of the filter element through spiral motion. The entire process only takes a few tens of seconds without interrupting the water supply.
2. Manual cleaning design
Some models support disassembling the flange cover or filter basket, directly cleaning the filter element after discharging residual liquid, suitable for high viscosity or special working conditions.
4、 Adaptation of application scenarios and filter types
1. Melt purification: For high-temperature melts (such as petroleum products), sintered fiber filters are used to intercept unmelted particles and ensure product purity.
2. Liquid precision filtration: Woven mesh filter cartridges are suitable for scenarios that require rated filtration accuracy, such as the pharmaceutical and food industries.
3. Gas dust removal: The filter element combined with electrostatic treatment can efficiently capture gaseous dust and is widely used in industrial waste gas treatment.
Through the above process combination, the stainless steel filter element achieves efficient and stable solid-liquid/gas separation, while also meeting the requirements of automated maintenance.
