Include a packing factor table indexed by packing type and size.
The choice of scrubbing liquid depends on the solubility of the target gas. For acidic gases like HClcap H cap C l SO2cap S cap O sub 2 , an alkaline solution (such as aqueous NaOHcap N a cap O cap H ) is common. For basic gases like NH3cap N cap H sub 3 , an acidic solution ( H2SO4cap H sub 2 cap S cap O sub 4 ) is used. Calculate the minimum liquid flow rate ( Lmincap L sub m i n end-sub
To build the , organize your workbook logically across four dedicated tabs to keep your calculations auditable:
Data from process simulators (like Aspen HYSYS) can be directly imported for optimization. 2. Key Components of a Scrubber Design Excel Model scrubber design calculation excel best
: Highly rated for its user-friendliness, this tool provides a preliminary calculation of single-stage spray towers
Base resistance of the structural media.
Must calculate tower cross-sectional area based on gas/liquid flow rates and gas density. Flooding Analysis Include a packing factor table indexed by packing
Constrain superficial velocity inputs to 1.5–3.0 m/s for random packing, and use conditional formatting to warn users when velocities fall outside these ranges.
Set up: Your design velocity must equal 70% of flooding velocity.
An automated safety warning using IF statements (e.g., =IF(Flood_Fraction>0.8, "WARNING: FLOODING RISK", "DESIGN SAFE") ). Essential Excel Formulas for Your Spreadsheet =SQRT((4 * Gas_Flow_Rate) / (PI() * Target_Velocity)) Use code with caution. For basic gases like NH3cap N cap H
Operate at 70–80% of the flooding limit to maintain stable operation and account for fouling and foaming.
D=4Aπcap D equals the square root of the fraction with numerator 4 cap A and denominator pi end-fraction end-root 3. Calculate Packing Height (NTU/HTU Method) The total height of the packed bed (
The column diameter must balance gas velocity. If the velocity is too high, the liquid cannot flow down, causing a catastrophic operational failure known as . If it is too low, mass transfer drops. Flooding Velocity ( Vfcap V sub f