Answer:
Number of Trays = Six (6)
Explanation:
Given that: y' = 25x' , in terms of molecular ratio, we can write it as
......... 1
after plotting this we get equilibrium curve as shown in the attached picture.
inlet concentration and outlet concentration of liquid phase is
x₂ = 4% = 0.04 (inlet)
so that can be converted into molar
and
x₁ = 0.2% = 0.002
Now we have to use the balance equation a
.............. a
here amount of solute is comparably lower than
Here we have
L = 300 kmol (total)
= 300(1 - 0.04) = 288 kmol pure oil
G = = 11.42 kmol
= 0 , solvent free steam
substitute into the equation a
Y₂ = 1.0003
Now plot the point A(X₁ , Y₁) and B(X₂ , Y₂) and join them to construct operating line AB.
Starting from point B, stretch horizontal line up to equilibrium curve and from there again go down to operating line as shown in the picture attached. This procedure give one count of tray and continue the same procedure up to end of operating.
at last count, the number of stage, gives 6.
∴ <em>Number of trays = 6</em>
