Activated carbon for filter cartridges is a porous material made from high-carbon-content materials (such as wood, coal, nutshells, or bones). It effectively removes impurities from water through physical and chemical adsorption. Its core characteristic lies in its well-developed microporous structure, providing a huge specific surface area (up to several thousand square meters per gram), thus efficiently adsorbing organic matter, residual chlorine, odors, pigments, and other pollutants.
The structural design of activated carbon filter cartridges emphasizes practicality and durability. They are typically made by sintering granular activated carbon with food-grade binders. An internal polypropylene skeleton enhances pressure resistance, while an outer layer of polypropylene fiber felt and a plastic mesh sleeve achieves dual filtration, with a nominal filtration accuracy of up to 10 microns. This structure not only traps particles larger than 10 microns but also combines adsorption and filtration functions, preventing carbon powder from shedding. Common specifications include a 10-inch (25.4 cm) cylindrical shape, a pressure resistance of approximately 0.4 MPa, and an operating temperature range typically of 5-38℃.
In water treatment applications, activated carbon filters effectively remove residual chlorine, organic pollutants, and off-colors and odors, and also have decolorizing properties. They are widely used in household water purifiers, industrial water purification (such as in the electronics, chemical, and food and beverage industries), and environmental protection projects. For example, in household water purification systems, it is often used as a second-stage filter, in conjunction with pretreatment materials like PP cotton, to improve the taste of the water. Coconut shell activated carbon, due to its larger specific surface area, has an adsorption capacity more than three times that of ordinary coal-based activated carbon, significantly improving water clarity.
Regarding lifespan and maintenance, the recommended replacement cycle for activated carbon filters is generally 6 months or for treating approximately 12 tons of water, depending on water quality (such as TDS value). In high-efficiency designs, the filter lifespan can be extended to 6-8 months, treating up to 4000 liters of water, with lower daily costs. Maintenance considerations include:
Regular replacement to prevent adsorption saturation and pollutant precipitation; In some industrial applications, air regeneration equipment can be used to remove pore residues, extending the lifespan.
