where Vg is the gas velocity (m/s or ft/s)

To design a functional packed bed scrubber for hot gases, follow these steps: Gas Saturation & Flow Correction

Write a simple macro to handle the iterative loop for adiabatic saturation temperature. This avoids "Circular Reference" errors in Excel.

Usually higher in hot applications to provide necessary cooling capacity.

This is critical for "hot" applications. You must calculate the heat transfer between the hot gas and the cooler liquid. : Sensible heat + Latent heat of evaporation.

High temperatures limit the use of cheap plastics (like PVC or FRP) in the inlet section. The Excel sheet must accurately predict the quench zone temperature to assist in proper metallurgy selection (e.g., Hastelloy, Inconel, or refractory-lined steel). 2. Core Modules Required in the Excel Template

The contaminant removal efficiency (η) can be calculated using the following formula:

Below is the logical order of engineering conclusions your Excel spreadsheet must display after running the calculations: Critical Dimensions Checklist

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Excel calculation sheet for rating of a spray tower scrubber

: The combined resistance of the packing, liquid spray, and mist eliminator, used to finalize the horsepower rating for your system's fan.

) units match your GPDC formula units (Imperial vs. Metric packing factors differ significantly).

[Tab 1: Inputs] ---> [Tab 2: Properties] ---> [Tab 3: Calculations] ---> [Tab 4: Summary] Tab 1: Input Parameters

A robust Excel model should be structured into three main sections: , Calculations , and Outputs/Results . A. Input Section Define the following parameters in your spreadsheet:

A high-temperature scrubber must cool the gas stream while removing particulates or acid gases. Your Excel tool should solve for these three primary variables: Based on gas velocity and flooding limits.

Cheap plastics like Polypropylene (PP) lose mechanical strength above 65°C (150°F) and can crush under the weight of the bed. For hot applications, your spreadsheet should flag warnings if temperatures exceed thresholds for plastics, prompting a switch to High-Temperature Polypropylene, PVDF, Tefzel, or Ceramic packing. 4. Step-by-Step Excel Implementation

D=4⋅Aπcap D equals the square root of the fraction with numerator 4 center dot cap A and denominator pi end-fraction end-root Module 5: Pressure Drop Estimation Pressure drop (

The diameter must ensure the scrubber operates below the flooding point. The often use the Generalized Pressure Drop Correlation (GPDC) . Calculate the flow parameter (