Utilize Excel's tool ( Data > What-If Analysis > Data Table ) to map how changes in alter the system pressure drop ( Generate a scatter plot charting Particle Diameter ( ) vs. Collection Efficiency ( ) to visually identify the scrubber's cut-diameter ( d50d sub 50 Tab 4: Fan Power & Operating Costs
Define these essential inputs in your spreadsheet's dedicated "Inputs" section: : Flow rate ( Qgcap Q sub g ), temperature ( Tgcap T sub g ), pressure ( ), moisture content, and molecular weight ( MWgascap M cap W sub g a s end-sub Liquid Properties : Flow rate ( Qlcap Q sub l ), temperature ( Tlcap T sub l ), density ( ρlrho sub l ), viscosity ( μlmu sub l ), and surface tension ( Particle Properties : Mean particle size ( ), particle density ( ρprho sub p ), and required removal efficiency ( 2. Calculating Throat Velocity ( )
ψ=C⋅ρp⋅dp2⋅Vt9⋅μg⋅d0psi equals the fraction with numerator cap C center dot rho sub p center dot d sub p squared center dot cap V sub t and denominator 9 center dot mu sub g center dot d sub 0 end-fraction venturi scrubber design calculation xls upd
This guide explores the fundamental design equations and provides a structured approach to building a calculation spreadsheet. Fundamental Principles of Venturi Scrubbers A Venturi scrubber consists of three main sections:
According to documentation from Cheresources and Scribd , the spreadsheet processes the following: Throat Velocity ( Utilize Excel's tool ( Data > What-If Analysis
): Aerodynamic mass median diameter of the target particles ( Liquid Stream Properties Volumetric flow rate of the scrubbing liquid ( GPMcap G cap P cap M Liquid Density ( ρlrho sub l ): Typically valued for water ( Liquid Viscosity ( μlmu sub l ): Dynamic viscosity of the scrubbing fluid ( 2. Venturi Geometry Dimensions
Venturi scrubbers are highly efficient wet scrubbing systems used to remove fine particulate matter (PM) and hazardous gases from industrial exhaust streams. Designing an effective Venturi scrubber requires precise mathematical modeling of gas-liquid interactions, fluid dynamics, and particle collection mechanics. At=Qgvtcap A sub t equals the fraction with
At=Qgvtcap A sub t equals the fraction with numerator cap Q sub g and denominator v sub t end-fraction Atcap A sub t , the diameter ( Dtcap D sub t
Older spreadsheets often rely on classical models from the 1970s—Johnstone, Calvert, or Yung models. While foundational, they lack:
To build an accurate design spreadsheet, several critical variables must be accounted for:
For highly corrosive or acidic flue gases, factor in material degradation adjustments if shifting away from basic carbon steel calculations to high-nickel alloys or FRP.
