Scrubber Design Calculation Excel - Hot

A complete wet scrubber design evaluation follows a sequential engineering workflow:

Represents the difficulty of the separation. For dilute systems with a pure solvent, it simplifies to:

If your Excel spreadsheet calculates an adiabatic saturation temperature or a liquid outlet temperature higher than 140∘F140 raised to the composed with power F

Use Goal Seek or an iterative formula loop until Gas Heat Loss = Liquid Evaporation Heat Gain. kg/hrkg/hr =Inlet_Gas_Mass + (Heat_Duty / Latent_Heat) Actual Gas Density kg/m3kg/m cubed =(Avg_Mol_Wt * P_atm) / (R * (T_sat + 273.15)) Flow Parameter ( ) =(L_Mass / G_Mass) * SQRT(Gas_Density / Liquid_Density) Gas Flood Flux ( G*cap G raised to the * power ) Sourced from GPDC curve fit equation using Flow Parameter Tower Diameter ( ) =SQRT((4 * Design_Vol_Flow) / (PI() * V_design)) NTU =LN(Pollutant_In / Pollutant_Out) Total Bed Height ( ) =NTU * HTU_Vendor Tab 4: Design Summary & Warnings

[ \Delta P_\texttotal = \Delta P_\textdry + \Delta P_\textirrigated ] scrubber design calculation excel hot

While the carrier gas volume shrinks, the total gas volume gains a massive amount of water vapor evaporated from the scrubbing liquid.

) unique to your chosen packing material (e.g., Pall rings, Raschig rings, or structured packing), find the gas velocity at flooding ( Vfloodcap V sub f l o o d end-sub ). A standard safety convention is to design the column at .

Pfan(kW)=Vact⋅ΔPtotal3600⋅ηfancap P sub fan end-sub open paren kW close paren equals the fraction with numerator cap V sub act end-sub center dot cap delta cap P sub total end-sub and denominator 3600 center dot eta sub fan end-sub end-fraction (where ηfaneta sub fan end-sub is the fan efficiency, typically 3. Step-by-Step Guide to Coding Formulas in Excel

Column sizing, packing depth, and fan power calculations must be based on the saturated gas properties at the exit of the quench zone , not the inlet hot gas properties. 2. Core Modules of the Excel Calculation Sheet A complete wet scrubber design evaluation follows a

Before any mass transfer (absorption) can be calculated, you must determine the quenched gas properties. The hot gas enters at temperature Tincap T sub i n end-sub and is cooled to the adiabatic saturation temperature Tsatcap T sub s a t end-sub by evaporating water. Heat Duty (

Do you prefer to build the calculations in or Imperial units ?

The pressure drop determines the fan power required for the system. In Excel, this is usually calculated using the or the Leva correlation for packed beds:

Total Packing Height required (including a safety factor, typically 10–20%) Total Pressure Drop (in. H2Ocap H sub 2 cap O Minimum Liquid Recirculation Rate (gpm or 4. Engineering Best Practices for Spreadsheet Verification ) unique to your chosen packing material (e

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Rapid cooling saturates the exit gas with water vapor, creating a visible white moisture plume at the stack. The spreadsheet should calculate down-stream reheating requirements if local environmental regulations prohibit visible plumes. If you want to build this tool, let me know:

Rapid temperature drops at the inlet can crack ceramic packing or buckle plastic internals. Ensure your tool prompts for a dedicated alloy or refractory-lined quench spray zone before the packing bed. Material Selection: Standard plastics like PVC soften above 60∘C60 raised to the composed with power C

Gas absorption in a packed bed scrubber relies on passing a contaminated gas stream upward through a chemical packing material while a liquid solvent (often water or an alkaline/acidic solution) flows downward. The packing maximizes the surface area for contact between the gas and liquid phases.

): Typically design for 60% to 80% of the flooding velocity. Diameter ( ): Tab 4: Packing or Spray Zone Height

: For common spray towers, a typical velocity is approximately Calculate Area ( ): Calculate Diameter ( ):