Excel calculation sheet for rating of a spray tower scrubber
The scrubber diameter is determined by the allowable gas velocity, which ensures adequate gas-liquid contact without excessive entrainment or flooding:
Store constant parameters and empirical formulas here. Use Excel formulas linked to temperature to ensure properties update automatically during iterations. Latent heat of vaporization ( ), density ( ρLrho sub cap L ), and viscosity ( μLmu sub cap L Gas Properties: Specific heat capacities ( ) as a function of temperature ( Constants: Gas constant ( ), atmospheric pressure ( Patmcap P sub a t m end-sub Tab 3: Calculation Engine
Using this structured layout allows you to create a robust, highly adaptable engineering design spreadsheet that handles both standard and high-temperature wet scrubber sizing calculations with precision.
The Cunningham correction factor, especially relevant for high‑temperature gases, incorporates gas temperature: scrubber design calculation excel hot
Dedicate the first sheet or top section to user inputs. Use distinct cell shading (like light blue) to mark these as editable fields. Inlet flow rate (
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 (
The (available from GrowMechanical.com) is a comprehensive tool that “helps streamline the selection process, saving you hours of calculations and improving precision”.
Before sizing the tower, you must calculate the saturated gas flow rate. Hot inlet gas will evaporate scrubbing liquid, increasing the gas volume and cooling it to its adiabatic saturation temperature. Excel calculation sheet for rating of a spray
Designing these systems requires iterative thermodynamic calculations. Building an automated Excel model streamlines this process, prevents manual calculation errors, and allows for rapid optimization of column diameter and packing height. 1. Key Design Challenges for Hot Gas Scrubbers
[ \eta = 1 - e^-k \cdot R \cdot \sqrt\psi ]
Select materials (packing, vessel lining) that can withstand both the temperature and the chemicals being scrubbed (e.g., Stainless Steel, Hastelloy, or specialty plastics).
Liquid density, viscosity, and surface tension. The hot gas enters at temperature Tincap T
: For hot gases, the scrubber will saturate the stream. You must calculate the saturated gas flow rate cap Q sub s a t end-sub ) and temperature ( cap T sub s a t end-sub
Spray towers are the simplest scrubber configuration. A liquid (typically water) is sprayed through nozzles into a vertical vessel as gas flows upward. The (available from melonimarco.it) performs preliminary calculations of removal efficiency and pressure losses for single‑stage spray towers. Internal scrubber parameters for spray towers include:
[ \Delta P_\texttotal = \Delta P_\textdry + \Delta P_\textirrigated ]
The applies these exact equations in an interactive tool, allowing engineers to input gas flow, temperature, and pressure, then instantly view pressure drop, efficiency, and droplet size results.
