Selection of Corrugation Spacing of the Plate
Briefly explains how to select the corrugation spacing of the plates based on the dust content of the flue gas.
Selection of Corrugation Spacing of the Plate
Dust is a key factor affecting the operating cycle of the heat storage medium, and the corrugation spacing needs to be selected based on the dust content.
The Impact of Dust Content on Operation
Dust gradually accumulates at the bottom of the corrugations and at corners, leading to narrowing of the channels, increased pressure drop, and decreased efficiency. The higher the dust content and the finer the dust particles, the faster the deposition rate.
The Logic of Corrugation Spacing Selection
Flue Gas Dust Content | Recommended Corrugated Gap | Considerations |
Clean (<5mg/m³) | 4-8mm (Fine) | Efficiency Priority |
Low Dust (5-20mg/m³) | 8-15mm (Medium) | Balancing Efficiency and Anti-clogging |
Medium Dust (20-50mg/m³) | 15-20mm (Coarse) | Anti-clogging Priority |
High Dust (>50mg/m³) | 20-25mm (Extra Coarse) | Extending Cleaning Cycle |
Dust particle size correction
Dust Particle Size | Spacing Requirements | Reasons |
Coarse particles (>50μm) | Recommended ≥15mm | Prone to bridging and clogging at the inlet |
Medium particles (10-50μm) | 10-15mm | Standard design |
Fine particles (<10μm) | 8-12mm | Insufficient airflow scouring force if too wide |
Supporting Measures
Front-end Dust Removal: Cyclone or baghouse dust collectors reduce inlet dust concentration.
Regular Purging: High-pressure air online cleaning.
Airflow Guiding Design: Inlet baffles prevent dust accumulation.
Summary
Corrugation spacing selection can be summarized as follows: finer corrugations for clean surfaces to improve efficiency, coarser corrugations for dusty surfaces to prevent clogging, and ≥20mm for high dust content to ensure throughput. Coarse particles require wider corrugations to prevent clogging, while fine particles can be appropriately narrowed to utilize airflow for scouring. Properly matching the spacing with dust content is key to balancing heat exchange efficiency and long-term operation.