The design of a packed column scrubber typically follows a sequence from initial gas properties to final vessel dimensions: Gas and Liquid Characterization
where Q is the gas flow rate (m³/s), A is the cross-sectional area of the duct (m²), V is the gas velocity (m/s), ρ is the gas density (kg/m³), and T is the temperature (K).
A robust Excel calculator must account for the (flow rate, temperature, density, viscosity) and the liquid stream properties (flow rate, solvent concentration, density). The heart of the calculation lies in determining the Liquid-to-Gas ratio (L/G) , a critical parameter that dictates the efficiency of mass transfer. Furthermore, engineers must calculate the pressure drop to ensure the fan selected for the system has sufficient power to overcome the resistance of the scrubbing media. In packed towers, calculating the flooding point —the velocity at which the gas prevents the liquid from flowing down—is essential to avoid operational failure.
), and chemical properties of both the gas and scrubbing liquid.