Plastic Heilex rings and Conjugate Rings
Briefly introduce other random packing materials such as plastic Heilex rings and conjugate rings.
Plastic Heil rings and Conjugate Rings
Within the plastic packing family, besides Pall rings, multifaceted hollow spheres, and floral ring packings, Hell rings and conjugate rings have undergone structural optimization for specific operating conditions, each with its own focus on pressure drop, anti-clogging, and mass transfer efficiency.
Hell Rings
Hell rings are cage-like random packings composed of multiple parallel circular rings and longitudinal ribs, resembling a "birdcage" in appearance. They are among the plastic packings with the highest porosity currently available.
Features | Description |
Structure | Parallel circular rings + longitudinal connecting ribs, cage-like |
Porosity | 97%-98% |
Specific Surface Area | 50-120 m²/m³ |
Material | PP、PE |
Advantages: extremely low pressure drop (lowest among all plastic fillers), extremely resistant to clogging, extremely light weight
Limitations: small specific surface area, low mass transfer efficiency
Applicable: Cooling tower, large air volume exhaust gas washing, easy-to-scale media
Conjugated ring
The conjugate ring adopts a spiral surface structure with an asymmetric shape, and the gas-liquid mixing is enhanced through the diversion design.
Characteristics | Description |
Structure | Helical curved surface, asymmetric |
Porosity | 90%-95% |
Specific surface area | 150-250 m²/m³ |
Material | PP、PVDF |
Advantages: Lower pressure drop (lower than Pall rings), higher mass transfer efficiency (close to Pall rings), better anti-foaming properties.
Limitations: Higher manufacturing cost than Pall rings.
Applications: Easily foaming systems, absorption towers, vacuum distillation.
Selection Recommendations
Operating Conditions | Recommended Packing Material | Reasons |
Pressure drop is the primary limitation (cooling towers, high-volume scrubbers) | Haier rings | Highest porosity, lowest pressure drop |
Easily foaming systems (e.g., amine absorption) | Conjugate rings | Helical curved surface breaks up foam |
High efficiency requirements, general operating conditions | Pall rings | Highest cost-effectiveness, good versatility |
Balancing pressure drop and anti-clogging | Cascade Ring | Good balance |
Summary
Haier rings and conjugate rings are optimized packing materials for specific operating conditions. They can be summarized as follows: Haier rings have the lowest pressure drop and the strongest anti-clogging properties, making them suitable for cooling towers and dirty media; conjugate rings are anti-foaming and have higher efficiency, making them suitable for easily foaming absorption systems. When selecting packing materials, the appropriate optimized packing material should be chosen based on the specific operating conditions.