Ceramic Lessing Ring Product Description

Ceramic Lessing Ring, also known as Ceramic One-Partition Ring, Ceramic Single Partition Ring, or Ceramic One-Word Ring in Chinese industry terminology, is a structural random packing developed as an improvement over the traditional Ceramic Raschig Ring. Its defining feature is a single vertical partition (diaphragm) inserted across the internal diameter of the cylinder—this design was patented as the “Lessing ring” and is recognized as one of the earliest structured enhancements to random tower packing. In Chinese industry, it is also commonly referred to by the alternative name 勒辛环 (Lessing Ring).

The ring is typically produced in large dimensions (Φ50mm up to Φ150mm and beyond) and is most often used in stacked (ordered) arrangement. Its primary role today is as a support and distribution layer at the bottom of random packed towers, where high mechanical strength and chemical resistance are essential.

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Product Highlights

• Enhanced Compressive Strength: The internal single partition significantly increases the ring‘s mechanical strength compared to standard Raschig Rings, providing the load-bearing capacity required for tower bottom support layers
• Improved Surface Area: The added partition increases the specific surface area, enhancing mass transfer potential while maintaining sufficient void space for gas-liquid flow
• Superior Acid Resistance: High-alumina ceramic composition resists all inorganic acids, organic acids, and organic solvents except hydrofluoric acid, with acid resistance >99.6%
• High Temperature Stability: Withstands operating temperatures up to 1200–1400°C with a softening point >1400°C, making it suitable for extreme thermal environments and RTO applications
• Tower Bottom Support Function: In Φ80–200mm sizes, Ceramic Lessing Rings serve as support material at the bottom of random packed towers, with void fraction greater than 60%
• Wide Industrial Application: Suitable for drying towers, absorption towers, cooling towers, scrubbing towers, and regeneration towers in chemical, metallurgy, coal gas, and oxygen production industries