Regarding the selection of chlorine exhaust fans for accidents

1. The Eckert universal correlation diagram (available in the principles of chemical engineering) is used to calculate the critical gas velocity and the pressure drop across the packing layer. First, the horizontal coordinate L/G (ρg/ρL)0.5 is determined based on the gas-liquid load; using this value, the critical point line on the diagram is identified, from which the vertical coordinate u2Φψ/g (ρg/ρL)μL0.2 is obtained. Finally, the value of u is calculated. u: Gas velocity in the empty tower, m/s; g: Acceleration due to gravity, m/s2; Φ(a/ε3): Dry packing factor, m-1; ρg: Specific weight of the gas phase, kg/m3; ρL: Specific weight of the liquid phase, kg/m3; μL: Viscosity of the liquid phase, cp; L: Flow rate of the liquid phase, kg/h; G: Flow rate of the gas phase, kg/h; Z: Height of the packing, m. 2. Given your process parameters: g=9.81 m/s2, a/ε3=180 m-1 (specific surface area/porosity, taking a Taylor flower ring as an example; dimensions: 73×27×3, with the packing arranged in a structured manner at the bottom and in a disordered manner at the top); what is γg? kg/m3, ρL=995 kg/m3, ρL=? kg/h, G=γgV, V=? m3/h, Φ=180 m-1, ψ=γ_water/γ_L=1 (approximate), μ_L=1 cp; then the abscissa: L/G(ρg/ρ_L)1/2=? Chartu: What is the value of the vertical coordinate?:? Then u2Φψ/g(ρg/ρL)μL0.2=?. It is found that the pressure drop ΔP/Z=?.1 mmH2O per meter of packing; therefore, the total pressure drop across the packing layer is:.1×4=?. mmH2O. OK!:victory:

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Thank you! In an absorption tower, if the material moves from water to alkaline spray, shouldn’t the pressure drop be more or less the same? Inlet T wind speed: 7.3 M/S; alkali inlet flow rate: 200 cubic meters per hour; plastic Pall rings are piled up in a disordered manner.