Before finalizing your scrubber design in Excel, always verify the following boundary conditions:
$$ L = \frac\textMolar flow rate of SO2 \times \textStoichiometric ratio\textMolecular weight of NaOH \times \textDensity of NaOH solution $$
where:
✅ – Diameter, pressure drop (Norton / Eckert), HETP, and packing height ✅ Venturi scrubber – Throat velocity, pressure drop, liquid-to-gas ratio, and particulate removal efficiency (Johnstone eqn.) ✅ Gas absorption – NOx, SO₂, or HCl removal with mass transfer coefficients ✅ Duct & fan sizing with static pressure loss ✅ Water balance & blowdown calculation ✅ Built-in unit converter and chemical properties table scrubber design calculation excel hot
) at inlet temperature and pressure using the Ideal Gas Law. 2. Perform Humidification and Saturation Calculations
Key packed bed design calculations include:
$$ \textMolar flow rate of SO2 = Q \times C \times \frac110^6 \times \fracPR \times T $$ Before finalizing your scrubber design in Excel, always
[ H = v_g \times t_\textcontact ]
For venturi scrubbers, the can be approximated as:
Calculates required packing depth based on target removal efficiency (e.g., 99%). Tab 4: Pressure Drop & Utilities Calculates total system pressure drop ( Calculates required pump motor power ( ) for liquid distribution. Calculates ID (Induced Draft) fan power ( ) required to overcome gas pressure drop. 4. Free VBA Code Snippet for Water Vapor Pressure Tab 4: Pressure Drop & Utilities Calculates total
[ \Delta P = f \times \frac12 \rho_g v_t^2 \times \text(geometry factors) ]
Total system pressure drop dictates the fan size needed to pull or push gas through the scrubber. Calculate ΔPcap delta cap P