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Apply your chosen design safety margin (e.g., 70% of flood) to find the design gas mass velocity ( Gdesigncap G sub d e s i g n end-sub
Below is the definitive methodology for building or evaluating a top-tier wet scrubber design spreadsheet (Venturi, Packed Bed, or Spray Tower).
This article provides a definitive guide to performing , focusing on the spreadsheet logic, key equations, and why Excel is the industry’s secret weapon. scrubber design calculation excel best
Gdesign=0.70×Gfloodcap G sub d e s i g n end-sub equals 0.70 cross cap G sub f l o o d end-sub Finally, calculate the total cross-sectional area ( ) and column diameter (
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 Apply your chosen design safety margin (e
Operating Velocity: Typically set at 60% to 80% of the flooding velocity.
For gas absorption operations with dilute concentrations (less than 5% solute), the driving force is assumed to be linear. Excel can evaluate NTUGcap N cap T cap U sub cap G focusing on the spreadsheet logic
Always stay within the industry-standard L/G ratio (ranging typically from 1 to 10
Height(H)=NTU×HTUHeight open paren cap H close paren equals NTU cross HTU
The dimensionless flow parameter compares the liquid-to-gas mass ratios adjusted for fluid densities: