Study the distillation column in Figure P24.20(a), the stream information in Table P24.20, and the additional information. Use the pump/system curve information in Figure P24.20

(b) as needed. It is necessary to scale up the throughput of this column without altering the column pressure.

a. Identify at least four potential bottlenecks to scale-up you can find, estimate the maximum percent scale-up possible for each, and identify the limiting bottleneck. Quantitative calculations are needed to support your result.

b. Suggest one method to debottleneck this problem that might possibly be accomplished without shutting the process down. What problem(s) might arise with this solution?

Figure P24.20(a)

Table P24.20

Figure 24.20 (b)

Additional information:
Cooling water supply lines to E-101 are 4-in schedule \(40, A=0.0129 \mathrm{~m}^{2}\)
Pump and system curves provided P-601 A/B not close to cavitation at normal operating conditions E-102 uses hps desuperheated to \(200^{\circ} \mathrm{C}\)
Column designed to operate at \(70 \%\) flooding Cooling water enters at \(30^{\circ} \mathrm{C}\) and design and maximum return temperature are both \(40^{\circ} \mathrm{C}\)
Assume maximum allowable velocity in pipes and tubes is \(3.75 \mathrm{~m} / \mathrm{s}\)
Equal resistances on each side in E-101 Condensation in shell in E-101

Transcribed Image Text:

hps bfw T-101 E-102 E-101 CW FIC V-101 LIC P-101 A/B