Wet Scrubber Design: Steps, Parameters, Calculation, Equations
Designing an industrial gas scrubber requires precise thermodynamic and aerodynamic calculations. When dealing with hot gas streams—such as incinerator flue gas, kiln exhaust, or furnace emissions—the design complexity increases. Hot gases undergo significant volumetric contraction upon entering a scrubber due to rapid evaporative cooling.
D=4×Asπcap D equals the square root of the fraction with numerator 4 cross cap A sub s and denominator pi end-fraction end-root 4. Determine Packing Height scrubber design calculation excel hot
Because the gas is hot, the water temperature will rise significantly. A common mistake is assuming the water temperature is constant. In your Excel sheet, add a heat balance on the water loop to compute the outlet water temperature. If the water exceeds 140°F, you risk scaling and reduced gas absorption.
You can download a sample Excel template from [insert link]. D=4×Asπcap D equals the square root of the
ΔP_hot = ΔP_ambient * (ρ_hot / ρ_ambient)
Your Excel workbook should be divided into sequential tabs or calculation blocks to mirror the physical process. Step 1: Inlet Gas Properties & Quench Calculations In your Excel sheet, add a heat balance
For effective particulate and acid gas removal, typical L/G ratios range from .
D=4Aπcap D equals the square root of the fraction with numerator 4 cap A and denominator pi end-fraction end-root Step 3: Calculate Height of Packing (Mass Transfer) The height of the packed bed ( ) is calculated using the Number of Transfer Units ( NTUcap N cap T cap U ) and the Height of a Transfer Unit ( HTUcap H cap T cap U