2 replies to this topic

[sg21255]

I am designing an ethylene glycol purification distillation column for my final project for a 700,000 ton/year capacity my results for the column are;--- MASS BALANCE ---
Feed = 1326.74 kmol/h, zF = 0.9718
Distillate= 1289.33 kmol/h, xD = 0.9985

Bottom = 37.41 kmol/h, xW = 0.0516
MEG recovery = 99.85%

--- OPERATING CONDITIONS ---
P_top = 100.0 mmHg, T_top = 144.52 °C
P_bot = 109.56 mmHg, T_bot = 177.18 °C
ΔP = 9.56 mmHg, T_avg = 160.85 °C

--- THEORETICAL DESIGN ---
N (McCabe-Thiele) = 13 stages
Feed plate = 6 (from top)

COLUMN GEOMETRY
HETP = 0.48 m
D_top = 4.64 m
D_bot = 5.28 m
D_column = 5.28 m (standard: 5.3 m)
H_packing = 6.24 m
H_total = 13.14 m
L/D ratio = 2.48

--- PRODUCT QUALITY ---
MEG purity = xD = 0.9985 mole fraction MEG
MEG recovery = 99.85%
Total MEG production = 1287.40 kmol/h “ as is it too high for 5.3m diameter for a distillation column with a L/D ratio of 2.48? I thought that maybe I can divide the unit as two column and diameter could decrease to 3.78 m something, since I did so many assumptions this is the final results what do ypu suggest?

[Pilesar]

For your project, I suggest checking your work, documenting your design, writing a good report. Two columns will be much more expensive than one column and I do not see the advantage of two columns. Congratulations on surviving school! The world needs more good engineers.

[breizh]

Hi,

To support your work.

Distillation Calculators | CheCalc

Breizh

Attached Files

•  PackdCol.pdf   663.29KB   4 downloads
•  Info RASCHIG Column Internals-1101.pdf   2.91MB   3 downloads
•  Distillation Basic Controls.pdf   570.51KB   4 downloads
•  distnprs.pdf   895.14KB   3 downloads
•  high performance random packing Norton.pdf   136.45KB   2 downloads