🌪️ Industrial Cyclone Particle Separator Sizer (Leith-Licht)

Size industrial cyclone dust collectors: 50% cut-off particle diameter (d50), fractional grade collection efficiency curve, inlet velocity, and pressure drop across Stairmand, Swift, and Lapple geometries.

⚡ Fortran 90 Engine Double Precision (IEEE 754) ✓ ISO / ASME Validated

Industrial Cyclone Particle Separator Sizer (Leith-Licht)

Fluid Mechanics

📊 Solver Telemetry ● ACTIVE

👁️ Views 19

⚡ Solves 14

💾 Downloads 256 📦 Fortran Code 4.5 KB

📅 Released Jun 2026

⏱️ Latency < 1 ms

🌪️ Reverse-Flow Cyclone Double Vortex & Centrifugal Separation

Real-time visual simulation: Outer descending dust vortex, inner clean gas vortex core, and hopper collection

📝 Configuration & Presets

🏭 Cement Clinker (Stairmand) 🪵 Wood Sawdust (Lapple) ⚡ Biomass Fly Ash (Swift) 🥛 Spray Dryer Powder

📐 Cyclone Geometry Standard

Proportions Model:

Cyclone Barrel Diameter D_c [m]:

💨 Gas Flow Conditions

Inlet Gas Volumetric Flow Q [m³/h]:

Gas Temperature [°C]:

Operating Pressure [bar abs]:

🔬 Dust Particle Characteristics

Target Particle Size d_p [μm]:

Dust Solid Density ρ_p [kg/m³]:

Lapple & Leith-Licht Formulation:
• Cut-off Diameter: d₅₀ = √[ 9 μ_g b / (2 π N_e V_in (ρ_p − ρ_g)) ] [μm]
• Grade Collection Efficiency: η(d_p) = 1 / [ 1 + (d₅₀/d_p)² ]
• Pressure Drop: ΔP_c = ½ ρ_g V_in² · N_H [mbar]
• Recommended Inlet Velocity: V_in ≈ 15 − 22 m/s.

📊 Separation Results

📊 Output Summary
💾 Fortran Source

Grade Collection Efficiency (at 8 μm)

63.41 %

Cut-off Diameter d₅₀: 6.08 μm | Pressure Drop: 11.5 mbar

V_in = 18.6 m/s

Cut-off Diameter (d₅₀) 6.08 μm 50% capture threshold

Cyclone Pressure Drop (ΔP) 11.5 mbar 1.15 kPa

Inlet Duct Gas Velocity 18.63 m/s Target: 15 - 22 m/s

Overall Cyclone Height 4.40 m 4.0 × Dc

📈 Fractional Grade Efficiency η (%) vs Particle Size dp (μm)

📉 Cyclone Pressure Drop ΔP (mbar) vs Inlet Velocity Vin (m/s)

=================================================================
 THERMOFLUIDCALC — CYCLONE PARTICLE SEPARATOR REPORT
=================================================================
Case Title                 : Biomass Boiler Fly Ash Cyclone Pre-Cleaner
Cyclone Geometry Standard  : Swift High-Efficiency (a=0.44D, b=0.21D, De=0.4D, NH=9.2)
Barrel Diameter (Dc)       : 1.10 m (Inlet = 0.48 m × 0.23 m)
Flow Conditions            : Q = 7500.0 m3/h (2.08 m3/s), Temp = 220.0 C, Pressure = 1.02 bar
Dust Characteristics       : dp = 8.00 microns, Solid Density = 2100.0 kg/m3
-----------------------------------------------------------------
CUT-OFF DIAMETER (d50)     : 6.077 microns
GRADE COLLECTION EFFICIENCY: 63.41 % (at 8.0 um)
CYCLONE PRESSURE DROP      : 11.51 mbar (1.151 kPa)
Inlet Duct Velocity (Vin)  : 18.63 m/s
=================================================================

📘 Calculation Methodology & Cyclone Dedusting Standards

Reverse-Flow Vortex Centrifugal Force

Tangential gas injection creates a powerful double vortex where centrifugal acceleration pushes solid particles outwards to the conical wall, falling into the bottom dust hopper.

Stairmand vs Swift Proportions

Standardized geometric proportions balance collection efficiency against pressure drop ($N_H = 6.4 - 9.2$ velocity heads), ensuring optimal fan electrical consumption.

Key Engineering Assumptions

Lapple / Leith-Licht semi-empirical grade efficiency formulation.
Ideal Stokes drag on micron-sized solid dust particles.
Applicable to cement kilns, biomass boilers, woodworking shops, and spray dryers.

ThermoFluidCalc Engineering Report