Page $14$

$40$ marks

Question $3$

$($a$)$ In reference to the fourteen elements of the Process Safety Management $($PSM$),$ outline the technical and safety requirement for the following two elements:

$($i$)$ Process Safety Information $($PSI$).$

$[5$ marks$]$

$($ii$)$ Process Hazard Analysis $($PHA$).$

$[5$ marks$]$

$($b$)$ The distillation column T$-1202$ and its accessory equipment $($condenser$,$ E$-505,$ reboiler, $E-504,$ the pump, $P-503\frac{A}{B}$ and the reflux drum, V$-504)$ is shown in Figure Q$3($b$).$

Figure Q$3($b$)$: Distillation ColumnT$-502$

$($i$)$ Examine and interpret the control loops on the PDF and specify for each loop the control objective, the controlled and manipulated variables.

$[6$ marks$]$

$($ii$)$ Recommend additional control schemes needed to maintain a safe and proper operation of the distillation column T$-502?$

$[8$ marks$]$

$($iii$)$ Develop and draw the Piping and Instrumentation Diagram $($P&ID$)$ of the distillation column.

$[6$ marks$]$

$($c$)$ Develop a HAZOP study to improve the safety of the process for the study node, the bottom line $($stream $12),$ Use the guide$-$words high and low to the process parameters: flow, temperature and pressure. Use Tables Q$3\mathrm{.}1-$Q$3\mathrm{.}3$ in Appendix C$.$

$[10$ marks$]$