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Retrieving "Pall Rings" from the archives

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  1. Fractional Distillation

    Linked via "Pall rings"

    Packed Columns
    These columns contain materials such as glass helices, metal saddles (e.g., Pall rings), or Raschig rings. These packing materials serve to maximize the surface area available for the intimate contact between the rising vapor and the descending refluxing liquid. The performance of a packed column is quantified by the Height Equivalent to a Theoretical Plate (HETP). A lower HETP indicates a more efficient column, meaning fewer meters of column are requi…

  2. Structured Packing

    Linked via "Pall Rings"

    Pressure Drop and Flooding
    Structured packing exhibits a significantly lower pressure drop per theoretical stage compared to random packing (e.g., Pall Rings or Raschig Rings) or trays. The pressure drop is modeled using a relationship dependent on the vapor velocity ($U_v$):
    $$\frac{\Delta P}{Z} = K1 \cdot Uv^2 + K2 \cdot Uv$$