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): Calculates pressure drop per meter of packing using modified Eckert correlations.
Standard scrubber design assumes isothermal conditions or negligible temperature drop. For streams (typically >150°F / 65°C up to 1800°F), the physics shift dramatically:
where R is the gas constant (8.314 J/mol·K).
: Hot gas often requires exotic alloys or specialized FRP (Fiber Reinforced Plastic). Ensure your Excel includes a "Material Factor" lookup table. scrubber design calculation excel hot
A customizable Excel spreadsheet is the most efficient tool for chemical and process engineers to automate these complex thermodynamic and aerodynamic calculations. 1. The Physics of Hot Gas Scrubbing
Account for the high moisture content of quenched gas by sizing a chevron or mesh mist eliminator at the top of the tower to prevent liquid carryover.
where Vg is the gas velocity (m/s or ft/s)
$$D (m) = \sqrt\fracQ_gas / 36000.785 \times V_gas$$ This public link is valid for 7 days
Note that as gas cools, its actual volume decreases significantly. Design your column diameter based on the volume at the average or outlet temperature to avoid over-sizing. 3. Column Diameter & Flooding
Iterative formulas to balance the heat lost by the gas with the heat gained by evaporating the liquid. Tab 3: Hydraulic Sizing (Column Diameter)
This is where Excel shines. Use the or the K4 vs. Flow parameter chart.
Based on required removal efficiency:
): Typically design for 60% to 80% of the flooding velocity. Diameter ( ): Tab 4: Packing or Spray Zone Height
Scrubber Design Calculation Excel Sheet for Hot Gas Applications
Below is the complete step-by-step framework to build your own robust design spreadsheet in Excel. 📊 Core Spreadsheet Input Parameters
Ensure the scrubber operates safely without weeping or flooding if the hot gas flow drops to 50% capacity. Can’t copy the link right now