) required to meet emission targets. It relies on the Number of Transfer Units (NTU) and the Height of a Transfer Unit (HTU) method: Z=HTU×NTUcap Z equals HTU cross NTU Based on inlet ( yiny sub in end-sub ) and outlet ( youty sub out end-sub ) gas concentrations:
Inlet flow rate (SCFM/Nm³/hr), inlet temperature (°C/°F), operating pressure, and gas molecular weight.
Based on required removal efficiency:
Scrubbers are typically designed to operate at 60% to 80% of the flooding velocity ( Calculate Area ( ) and Diameter ( ): scrubber design calculation excel hot
) : The gas must be cooled before effective scrubbing. Calculate the adiabatic saturation temperature to determine the final volume. :
Disclaimer: Scrubber design should always be verified by a licensed professional engineer (PE) to account for specific system dynamics and safety factors.
: Program conditional formatting rules that flash red if the calculated fluid velocity exceeds of the flooding velocity limit. 7. Materials of Construction (MOC) Warning for Hot Systems ) required to meet emission targets
A=Qactual,outVdesigncap A equals the fraction with numerator cap Q sub a c t u a l comma o u t end-sub and denominator cap V sub d e s i g n end-sub end-fraction
: Mole fractions of inert gases (nitrogen, carbon dioxide) and target pollutants (e.g., SO2SO sub 2 NH3NH sub 3 Operating Pressure ( ) : Usually near atmospheric pressure ( Liquid Stream Inputs Liquid Density ( ρlrho sub l ) and Viscosity ( μlmu sub l
cap Q sub s a t end-sub equals cap Q sub i n end-sub center dot open paren the fraction with numerator cap T sub s a t end-sub and denominator cap T sub i n end-sub end-fraction close paren center dot open paren the fraction with numerator cap P sub i n end-sub and denominator cap P sub s a t end-sub end-fraction close paren (Corrected for moisture addition). Column Diameter Sizing Determine the column diameter based on superficial gas velocity ). For most vertical scrubbers, is kept between to avoid flooding while maintaining contact time. Calculation: Mass Transfer & Packing Height Calculate the Height of a Transfer Unit (HTU) Height Equivalent to a Theoretical Plate (HETP) . For hot acid gases (like cap H cap C l For most vertical scrubbers
A=QsatVgcap A equals the fraction with numerator cap Q sub s a t end-sub and denominator cap V sub g end-fraction
When dealing with hot gas scrubbers, the liquid temperatures inside the column will rise. Standard, cost-effective plastics like Polypropylene (PP) or Polyvinyl Chloride (PVC) soften rapidly above 140∘F140 raised to the composed with power F 60∘C60 raised to the composed with power C