NTU=ln[(1−mGL)(y1−mx2y2−mx2)+mGL]1−mGLNTU equals the fraction with numerator l n open bracket open paren 1 minus the fraction with numerator m cap G and denominator cap L end-fraction close paren open paren the fraction with numerator y sub 1 minus m x sub 2 and denominator y sub 2 minus m x sub 2 end-fraction close paren plus the fraction with numerator m cap G and denominator cap L end-fraction close bracket and denominator 1 minus the fraction with numerator m cap G and denominator cap L end-fraction end-fraction Height of a Transfer Unit (HTU)
: Total pressure drop includes losses from dry packing, liquid spraying, and internal supports. A common design target is an initial drop of cap H sub 2 cap O of packing. Best Practices for Excel Design Sheets
HTU: This represents the efficiency of the specific packing material used.
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Use the (Leva’s method) or the Eckert Modified Diagram . scrubber design calculation excel best
Structured in clear columns with data validation rules (e.g., preventing negative flow rates).
BHP=Qg×ΔP6356×Fan EfficiencyBHP equals the fraction with numerator cap Q sub g cross cap delta cap P and denominator 6356 cross Fan Efficiency end-fraction
The best scrubber designer isn’t the one with the most expensive software. It’s the engineer who can open Excel, validate the physics in 10 minutes, and say with confidence: “This column will be 32 inches in diameter, 14 feet of packing, and drop 0.8 inches of water per foot.”
The design of a packed column scrubber typically follows a sequence from initial gas properties to final vessel dimensions: Gas and Liquid Characterization This public link is valid for 7 days
(gas-phase basis) using the log-mean driving force equation:
Use =ROUNDUP(Diameter,1) to standardize to nearest 6-inch increment.
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NTU represents the overall difficulty of achieving the target chemical separation. For a dilute system with a linear equilibrium curve ( ), use the Colburn equation in Excel: Can’t copy the link right now
Y=(Gflood)2Fpμl0.1ρg(ρl−ρg)gccap Y equals the fraction with numerator open paren cap G sub f l o o d end-sub close paren squared cap F sub p mu sub l to the 0.1 power and denominator rho sub g open paren rho sub l minus rho sub g close paren g sub c end-fraction Gfloodcap G sub f l o o d end-sub = Gas mass velocity at flood ( Fpcap F sub p = Packing factor ( m-1m to the negative 1 power μlmu sub l = Liquid viscosity ( = Gravitational constant ( Step 3: Calculate Diameter and Cross-Sectional Area Excel should isolate Gfloodcap G sub f l o o d end-sub
, this bilingual (Italian/English) guide allows for preliminary calculations of single-stage spray towers, focusing on removal efficiency and pressure losses. Venturi Scrubber Design Calculation XLS
I can provide the exact empirical equations and packing factors for your configuration. Share public link
: Cells for entering gas flow rates (ACFM), inlet temperatures, pressures, and pollutant concentrations.
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