Page 85 - Plant design and economics for chemical engineers

Possible problem Are unloading con-
in reactor nections different?
What are possible
impurities?
Pressure
Less 10. Break l-in. line to Reagent released Potential fire PICA-l Consider PAL to
flare or l-in. PICA- 1
nitrogen line
Consider independent
PAL.
11. Lose nitrogen Tank implodes Reagent released PICA-l Consider vacuum-break
valve.
12. PV-2 fails closed Tank implodes Reagent released PICA-l Consider PAL on
PICA-l.
13. PICA-1 fails, Tank implodes Reagent released PICA-l Tank not designed
closing PV-2 for vacuum.
More 14. PICA-l fails Reagent released Tank rupture if PICA-l What is capacity of
closing PV-1 via RV-1 RV-1 fails PV-l? RV-l?
Consider independent PAH.
15. PV-1 fails Reagent released Tank rupture if PICA-1 Consider independent PAH.
closed via RV-1 RV-1 fails
16. V-7 closed Reagent released Tank rupture if PICA-1 Is V-7 locked open?
via RV-1 RV-1 fails Is V-S locked open?
Consider independent PAH.
17. Ovefill tank See Event 6 Tank rupture if PICA-1 Consider second
RV-1 fails high-level shutoff.
18. Temperature of Reagent released Tank rupture if PICA-l What prevents high
inlet is hotter via RV-1 RV-1 fails temperature of inlet?
than normal Consider independent PAH.
19. High pressure Reagent released Tank rupture if PICA-l Can pressure in flare
in flare header via RV-1 RV-1 fails header exceed tank
design? Consider
alternative venting.