What is the Operating Principle of an Inclined Plate Settling Tank?
I. Core Operating Principle (Based on Shallow Tank Theory)
By adding inclined plates to traditional settling tanks, it breaks the limit that "tank depth decides sedimentation efficiency". The key logic has 3 parts:
1.Shorter settling distance, faster efficiency
In traditional tanks, particles settle 2-4m to the bottom; with inclined plates, they only need to settle 50-100mm to the adjacent plate. When particle settling speed is fixed, settling time is cut to 1/20-1/80 of the original, handling more wastewater in the same time.
2. Larger settling area, lower load
Plates are tilted at 60°, so their projected area (perpendicular to water flow) is much bigger than the tank's horizontal area. With the same wastewater volume, the "surface loading rate" (wastewater per unit area per hour) drops-particles get more time to settle, especially fine ones.
3. Auto-sliding sludge, no blockage
60° is steeper than sludge's repose angle (30°-45°). Sludge on plates slides down to the bottom by gravity, no extra scraping equipment needed, and no blockage between plates
Ⅱ. Key Design Parameters (Simplified)
|
Design Part |
Key Requirements |
Core Role |
|
Inclined Plates |
Spacing ≥50mm; Length 1.0-1.2m; 60° tilt; Net spacing 80-100mm |
Prevent blockage; ensure settling time; auto-sludge sliding |
|
Tank Height |
0.5-1.0m water above plates; 1.0m buffer layer; ≥0.5m water distribution zone |
Stable water flow; no sludge re-suspension |
|
Effluent Collection |
Multi-row perforated pipes;holes 2cm under water |
Uniform collection; no floating matter intake |
|
Flow Velocity (Domestic Sewage) |
0.5-0.7mm/s |
Avoid sludge accumulation or scouring |
Ⅲ. Simple Design Calculation (Example: Domestic Sewage)
Given: Wastewater volume (Q = 500m^3/h); particle settling speed (U0= 0.3mm/s)
Key indicators: Plates (100mm spacing, 1.2m length, 60° tilt); flow velocity 0.6mm/s; tank heights (0.8m above plates, 1.0m buffer, 0.5m distribution, 1.5m sludge)
Key results:
Total plate projected area: ~535m²; number of plates: ~450 (1m width each)
Tank width: ~45m (or 8 grids × 5.6m each); total depth: ~4.9m
Ⅳ. Get Complete Solutions & Free Samples
The above is a basic framework. Actual projects need adjustments for wastewater quality, site conditions, and standards.
For customized designs (calculations, drawings, equipment lists) or free samples (1-2 plates for testing), contact the Juntai Team directly. With 10+ years of experience, they ensure stable operation and cost control.