Calculations
Recommendations
Sludge removal device for settling tank (BIOWASSERTRACK®)Celerity in pipes filled with waterPercolator Biologic Filter Crusher - Bond's Law | Power and SizingLapple cyclone
Input data
Cyclone diameter
Output data
Input data
Output data
Input data
Cyclone's diameter
Input total flow
Data
Mesh
Retained accumulated
Output data
Total mass of overflow
Total mass of underflow
Granulometric distribution output
Mesh
Retained at underflow
Retained at overflow
Input data
Diameter cut
Input total flow
Data
Mesh
Retained accumulated
Output data
Total mass of overflow
Total mass of underflow
Granulometric distribution output
Mesh
Retained at underflow
Retained at overflow
Description
The Lapple cyclone is a widely used device for separating solid particles from gases through centrifugal force. It provides a simplified yet effective model to estimate separation efficiency, pressure drop, and power requirements in ventilation and exhaust systems.
Lapple Cyclone
Available calculation methods:
- Dimensions – computes main geometric parameters, cut diameter, pressure drop, and power.
- Granulometric curve – generates the grade efficiency curve as a function of particle size.
- Granulometry from the cyclone diameter – calculates the outlet granulometric distribution based on the cyclone diameter.
- Granulometry from the diameter cut – estimates outlet granulometric distribution using a predefined cut diameter.
Inputs and outputs of the dimension calculation
Inputs
Parameter | Default units | Description |
|---|---|---|
Cyclone diameter ($dc$) | m | Main dimension of the cyclone |
Particle density ($\rho_p$) | kg/m³ | Solid particle density |
Air flow ($Q$) | m³/s | Volumetric airflow |
Air density ($\rho$) | kg/m³ | Carrier fluid density |
Air viscosity ($\mu$) | Pa·s | Dynamic viscosity of air |
Blower efficiency ($\eta$) | % | Efficiency of the fan |
Outputs
Parameter | Default units | Description |
|---|---|---|
Cut diameter ($d_p$) | m | Particle diameter at 50% collection efficiency |
Head loss ($\Delta P$) | Pa | Pressure drop across the cyclone |
Power ($P$) | W | Power required for operation |
L1, L2, L3 | m | Characteristic heights of the cyclone |
W | m | Inlet width |
Dd | m | Discharge duct diameter |
H | m | Cylindrical body height |
De | m | Exit diameter |
References
- CIMBALA, J. M. Lesson 12B: Lapple Cyclone. A Practical Application of Inertial Separation.