What are the application scenarios of folding filters?

Pleated filters, with their large filtration area, high efficiency, low pressure drop, and easy replacement, are widely used in liquid and gas filtration scenarios in various industries, covering industrial production, environmental protection treatment, food and medicine, scientific research experiments, and other fields. The following is the specific classification and description of application scenarios:
I. Liquid Filtration Scenarios
The pharmaceutical and biopharmaceutical industry
Pharmaceutical liquid filtration: It is used for clarifying and filtering raw materials, injections, oral liquids, and other pharmaceutical liquids to remove particulate impurities, microorganisms (such as bacteria and fungi), and colloidal substances, ensuring the purity of the drugs. For instance, nylon or polyethersulfone (PES) pleated filter cartridges are used to filter vaccine and antibiotic solutions.
Process water treatment: Filtration and purification of water, intermediate water in the preparation process of injection water, removal of particle contamination caused by pipelines and storage tanks, and protection of subsequent reverse osmosis (RO) membranes or EDI equipment.
Fermentation broth filtration: Separating bacteria, cell fragments, etc., during the fermentation process, such as the pretreatment filtration of antibiotic fermentation broth.
2. Food and beverage industry
Beverage clarification: Filter fruit juice, beer, wine, soft drinks, etc., to remove fruit pulp residues, yeast, microorganisms, etc., to enhance the clarity and stability of beverages. For instance, in beer filtration, pleated filters are used to remove yeast cells and protein particles.
Syrup and additive filtration: Filter high-concentration syrup, food coloring, preservatives, etc., to prevent impurities from affecting the product's taste or clogging the filling equipment.
Edible oil refining: Filter out the gum, impurities, and suspended particles in frying oil and vegetable oil to extend the service life of the oil products.
3. Chemical and fine chemical industry
Solvent and chemical filtration: Filter organic solvents (such as ethanol, acetone), coatings, inks, adhesives, etc., remove undissolved particles, pigment impurities, and ensure product purity and subsequent processing quality.
Catalyst recovery: In chemical reactions, expensive catalyst particles (such as palladium and platinum catalysts) are filtered and recovered to reduce production costs.
Cooling water and circulating water filtration: Remove rust, sludge, and microbial slime from circulating water to protect heat exchangers and pipelines from blockage and corrosion.
4. Electronics and semiconductor industry
Ultra-pure water filtration: In the production of chips and electronic components, it filters out tiny particles (less than 0.1μm) and ionic contaminants in ultra-pure water to prevent short circuits or performance failures of components.
Photoresist and developer filtration: Filter impurities from the photoresist to ensure the accuracy of the lithography pattern and improve the yield of the chip.
5. Environmental protection and the water treatment industry
Industrial wastewater treatment: Filter suspended particles and heavy metal precipitates in electroplating wastewater, printing and dyeing wastewater, etc., reduce wastewater turbidity, and provide pretreatment for subsequent biochemical treatment or discharge compliance.
Purification of domestic drinking water: As the core filter element of household or commercial water purifiers, it removes sediment, rust, colloids, and other substances from water to improve water quality.
Ii. Gas Filtration Scenarios
Compressed air and gas purification
Compressed air filtration: Remove oil mist, water vapor, and dust particles from compressed air to protect pneumatic equipment (such as cylinders, valves), painting equipment, or food packaging machines and prevent product contamination.
Industrial gas filtration: Filtering out trace impurities in nitrogen, oxygen, inert gases, etc., to meet the demand for high-purity gases in industries such as electronics and metallurgy.
2. Cleanroom and ventilation system
Air purification: In places such as pharmaceutical cleanrooms, hospital operating rooms, and electronic cleanrooms, it serves as a pre-filter or post-filter element for high-efficiency air filters (HEPA), removing dust and microorganisms from the air to maintain cleanliness levels (such as Class 100 and Class 1,000).
3. High-temperature gas filtration
Industrial furnace and kiln exhaust gas treatment: High-temperature resistant pleated filters (such as those made of metal) are used to filter out dust particles in the high-temperature flue gas emitted from boilers and incinerators, reducing air pollution.
Gas filtration in drying equipment: During the drying processes of food and chemical materials, impurities in hot air or inert gas are filtered to prevent contamination of the materials.
Iii. Other special scenarios
Automobile and mechanical manufacturing: Filter metal debris and gum from engine coolant, hydraulic oil, and transmission oil to protect engines and hydraulic systems.
Scientific research experiments: Precision filtration for small liquids or gases in laboratories, such as sample pretreatment filtration before chromatographic analysis, to remove interfering particles.
Ship and Ocean Engineering: Filter algae, sediment in seawater desalination systems, or impurities in ship fuel to ensure the normal operation of equipment.
Summary
The core application of pleated filters lies in achieving efficient filtration within a limited space. Their application scenarios range from basic industrial production to high-precision fields such as medicine and electronics. Moreover, with the development of filter material technology (such as acid and alkali resistance, high-temperature resistance, and antibacterial properties), their application scope is constantly expanding. When making a selection, it is necessary to match the appropriate filter material and structure based on parameters such as the filter medium (liquid/gas), temperature, pressure, type of impurities, and filtration accuracy.