Here is a practical workflow for creating a scrubber design calculation sheet in Excel:
Tower Diameter (m): D=4⋅Qg3600⋅π⋅fflood⋅UfTower Diameter (m): cap D equals the square root of the fraction with numerator 4 center dot cap Q sub g and denominator 3600 center dot pi center dot f sub f l o o d end-sub center dot cap U sub f end-fraction end-root
This guide breaks down the core chemical engineering principles required to build or evaluate the . 1. Establish Core Design Inputs
where η is efficiency (as a fraction), k is a correlation coefficient (typically 0.1–0.2), R is the liquid-to-gas ratio, and ψ is the inertial impaction parameter.
📥 Download the Best Scrubber Excel Tool Now scrubber design calculation excel best
Lowering the target from 80% to 65% increases the vessel diameter, which reduces gas velocity and drops the pressure gradient. Reducing Excessive Column Height
Process streams are frequently provided in a mix of metric and imperial units (e.g., Flow in
Cross-Sectional Area (Ac)=Qg3600⋅UdCross-Sectional Area open paren cap A sub c close paren equals the fraction with numerator cap Q sub g and denominator 3600 center dot cap U sub d end-fraction
The height of the packed bed depends on how easily the pollutant transfers from the gas phase to the liquid phase. This is calculated using the Number of Transfer Units (NTU) and the Height of a Transfer Unit (HTU). Here is a practical workflow for creating a
1. EPA Air Pollution Control Cost Manual (Wet & Dry Scrubbers)
The height is calculated mathematically by multiplying the by the Height of a Transfer Unit (HTU) : Z=HTU×NTUcap Z equals HTU cross NTU Number of Transfer Units (NTU)
Calculate gas density using the Ideal Gas Law: =(Pressure * Mol_Weight) / (Universal_Gas_Constant * (Temperature + 273.15)) .
Flv=(LG)ρGρLcap F sub l v end-sub equals open paren the fraction with numerator cap L and denominator cap G end-fraction close paren the square root of the fraction with numerator rho sub cap G and denominator rho sub cap L end-fraction end-root Step B: Find the Flooding Gas Velocity ( Vfcap V sub f Using the calculated Flvcap F sub l v end-sub 📥 Download the Best Scrubber Excel Tool Now
Create a dedicated area for conversions (e.g., ACFM to m³/s) so all input data is standardized to SI or Imperial before calculation.
Instead of writing formulas with abstract cell coordinates like =B2*C15 , name your cells. A formula written as =Gas_Flow * Gas_Density is self-documenting and significantly reduces calculation errors.
This is where Excel's mathematical capabilities shine. The diameter of a packed scrubber depends heavily on the flooding velocity. The classic method relies on the correlation. The x-axis parameter is calculated as:
A second set of eyes catches errors that you might miss.
Instantly see how varying the Liquid-to-Gas (L/G) ratio impacts the number of transfer units (NTU) and overall removal efficiency.