For ammonia plants, a vital goal is extending time between turnarounds. Currently, runtimes range from one to four years. Yet, ammonia facilities have several waterside issues that can ..
For ammonia plants, a vital goal is extending time
between turnarounds. Currently, runtimes range from one to
four years. Yet, ammonia facilities have several waterside
issues that can limit runtimes or cause unplanned shutdowns.
They include corrosion and deposition in bayonet and scabbard
waste-heat boilers, corrosion in the high-pressure reformer
waste-heat boiler (Kellogg designation, 101-C) and cooling
water deposition and microbiological fouling in heat
exchangers.
Waste-heat boiler -
bayonet and scabbard. Bayonet and scabbard units
have a history of failure due to very high heat transfer and
small diameter
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