This comprehensive guide breaks down the essential steps, formulas, and methodologies required to build a robust, high-utility scrubber design calculation template in Excel. 1. Fundamentals of Packed Bed Scrubber Design
Include a minimum wetting rate check in your spreadsheet. If the calculated liquid flow per unit of packing circumference falls below the packing manufacturer's minimum, increase liquid flow or reduce tower diameter.
Represents the difficulty of the separation.
Most designs aim for 50% to 85% of flooding velocity . Formula Logic: Calculate the gas mass velocity ( scrubber design calculation excel best
ΔP/L = 150 × (1−ε)²/ε³ × (μU)/(d_p²) + 1.75 × (1−ε)/ε³ × (ρU²)/(d_p)
Every scrubber calculation sequence begins with raw process data. You must gather and verify these input values before starting your spreadsheet equations. Gas Stream Properties Volumetric Flow Rate ( Qgcap Q sub g
L = (Q x C) / (η x ρ)
| Parameter | Units | Typical Range | Why Critical | |-----------|-------|---------------|---------------| | Gas flow rate (Q_g) | ACFM or m³/h | 500–100,000 | Sizes vessel diameter | | Inlet dust/gas temp | °F or °C | 60–1000°F | Affects gas density, viscosity | | Pressure drop (ΔP) | inWC or Pa | 4–100+ | Drives energy & fan cost | | Liquid-to-gas ratio (L/G) | gal/1000ft³ or L/m³ | 2–20 | Key for mass transfer | | Particulate size (d_p) | microns | 0.5–200 | Determines collection efficiency |
=LN((Y_in - Y_star_in) / (Y_out - Y_star_out))
| | C_in (kg/m³) | C_out (kg/m³) | η (%) | | --- | --- | --- | =(A2-B2)/A2 | This comprehensive guide breaks down the essential steps,
Designing a packed bed specifically for acid gas removal (like HCl).
Ratio: Use Excel to find the minimum liquid flow rate that achieves the target emission limit without exceeding pressure drop constraints.
Where Q_g is in m³/h, ΔP is in Pa, and η_fan is fan efficiency (typically 0.7–0.85). If the calculated liquid flow per unit of