7-hole porcelain strip is a specialized porous ceramic component engineered with seven precision-machined microchannels, tailored for efficient fluid or gas distribution in industrial systems-with its core material being high-purity alumina powder blended with pore-forming agents, as specified in its product design. Its manufacturing process follows a strict sequence: first, the alumina-pore-forming agent mixture is extruded through a custom die (to ensure the seven microchannels are uniform in size and spacing), then subjected to high-temperature sintering. This sintering step not only solidifies the structure but also controls the formation of its porous network, a key feature that defines its performance.
Per its technical specifications, product boasts a porosity of over 50% (higher than many porous ceramic strips, enabling better fluid permeability) and an air permeability of approximately 200 L/m²·h·Pa-metrics that ensure efficient gas flow while maintaining enough mechanical strength to withstand assembly and operational stress. Its primary application is in wastewater treatment plants, where it is assembled into aerators and installed at the bottom of aeration tanks to deliver oxygen to sewage. The seven microchannels, paired with its porous structure, generate small, uniform bubbles that maximize the contact area between air and water-this boosts the oxygen transfer efficiency (OTE) to over 25%, a significant improvement compared to traditional perforated tube aerators.
Additionally, 7-hole porcelain strip exhibits strong corrosion resistance (able to withstand the acidic/alkaline nature of sewage) and anti-clogging properties (its porous network prevents debris buildup), allowing it to operate continuously for over 10 years without replacement. This longevity cuts the operational costs of wastewater treatment plants by reducing the frequency of aerator maintenance and replacement, while its energy efficiency aligns with environmental sustainability goals. For wastewater treatment operators, 7-hole porcelain strip is a high-value component that balances performance, durability, and cost-effectiveness, ensuring reliable sewage treatment processes.
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