Calculated to size the system fan or blower accurately. 2. Step-by-Step Scrubber Design Calculations
Gas flow, temp, pressure, packing type, contaminant concentration. Intermediate Calculations (Yellow Cells): ρgrho sub g , gas velocity, flow parameter
The design of a scrubber involves several key calculations, including:
🚀 When dealing with "hot" gases, ensure your material selection (FRP or alloys) is validated against the saturation temperature calculated in your sheet. scrubber design calculation excel hot
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 = Column cross-sectional area ( m2m squared Vgcap V sub g = Operational gas velocity ( , typically for packed towers) = Column internal diameter ( Step 4: Packing Height and Liquid Hydraulics The height of the packing zone ( ) is calculated using the Number of Transfer Units ( ) and the Height of a Transfer Unit ( Z=NTU⋅HTUcap Z equals NTU center dot HTU
Include a reference note in your sheet. Hot gases handling acid components often require exotic alloys or specialized FRP (Fiberglass Reinforced Plastic) with vinyl ester resins capable of handling high quench temperatures.
Never hardcode packing factors or densities directly into your formulas. Keep them referenced to independent cells so you can swap out packing sizes or gas compositions without breaking the sheet logic. Calculated to size the system fan or blower accurately
For engineers working on emission control in high-temperature industrial processes, an efficient scrubber design calculation tool in Excel is indispensable. Industrial processes involving furnaces, incinerators, and kilns generate hot flue gases laden with pollutants such as SO₂, NOx, HCl, and fine particulate matter (PM). These gases, often ranging from 150°C to over 300°C before any cooling stage, require careful treatment before atmospheric release. Spreadsheet-based design tools allow engineers to streamline the selection process, saving hours of manual calculations while improving design precision.
): High temperature increases gas volume and enhances evaporation. Concentration of contaminants ( SO2cap S cap O sub 2 HClcap H cap C l , particulate matter). Liquid Flow Rate ( ): Scrubbing liquid (usually water + reagent). Scrubber Diameter ( ): Based on allowable gas velocity (flooding calculation). Packing Height ( ): Based on Transfer Units ( 3. Step-by-Step Calculation Methodology A robust Excel model should follow these steps: Step 1: Physical Properties
: Divide the saturated volumetric flow rate by the allowable shell velocity (typically around for spray towers). Cross-Sectional Area ( cap A sub s Intermediate Calculations (Yellow Cells): ρgrho sub g ,
An Excel spreadsheet allows you to quickly evaluate different packing materials, gas flow rates, and liquid-to-gas (L/G) ratios. Organize your workbook into four distinct, logical sections. Section 1: Input Parameters (Data Entry)
The required height depends on the mass transfer efficiency needed to meet outlet concentration targets.
H=NTU×HTUcap H equals cap N cap T cap U cross cap H cap T cap U Step 4: Pressure Drop Calculations
[ H = v_g \times t_\textcontact ]
Before deploying your Excel design sheet for official project estimations, verify it against known standards using this final checklist: