FIS-483 Consolidated Engineering Study Report

Marathon Petroleum Company, Catlettsburg Refinery, KY
Capacity Improvement Study of LPCCR Platformer Heater (1-44-B-1/2/3/4)
radiant heat flux is 12,700 Btu/hr.ft 2 . The radiant tubes have a maximum metal
temperature of 1,125°F.
The Charge heater has 41.9 ft high, 38.14 ft long and 17.94 ft wide inside insulation
dimensions. It consists of 28 inverted arbor coils arranged in 28 passes. The coils
are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The effective
length of the coil is 87.3 ft. The coils are placed at a center to center spacing of
1.27 ft. The radiant heat transfer area is 2,879 ft 2 .
No.1 Interheater (1-44-B-2)
The No.1 Interheater is designed for 37.46 MMBtu/hr duty. This cell is designed to
heat 211,731 lb/hr of feed from 801ºF to 1,010ºF. The feed enters at a pressure of
71.8 psig and leaves at 69.8 psig. The calculated coil pressure drop is 2 psi. The
process fluid mass velocity is 23.8 lb/sec.ft 2 . The average radiant heat flux is
10,065 Btu/hr.ft 2 and the maximum radiant heat flux is 14,090 Btu/hr.ft 2 . The
radiant tubes have a maximum metal temperature of 1,130°F.
The No.1 Interheater has 54.47 ft high, 38.14 ft long and 15.05 ft wide inside
insulation dimensions. It consists of 28 inverted arbor coils arranged in 28 passes.
The coils are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The
effective length of the coil is 112.85 ft. The coils are placed at a center to center
spacing of 1.27 ft. The radiant heat transfer area is 3,723 ft 2 .
No.2 Interheater (1-44-B-3)
The No.2 Interheater is designed for 28.7 MMBtu/hr duty. This cell is designed to
heat 211,731 lb/hr of feed from 852ºF to 1,010ºF. The feed enters at a pressure of
68.2 psig and leaves at 66.2 psig. The calculated coil pressure drop is 2 psi. The
process fluid mass velocity is 23.8 lb/sec.ft 2 . The average radiant heat flux is 9,970
Btu/hr.ft 2 and the maximum radiant heat flux is 13,960 Btu/hr.ft 2 . The radiant tubes
have a maximum metal temperature of 1,125°F.
The No.2 Interheater has 41.9 ft high, 38.14 ft long and 16.1 ft wide inside
insulation dimensions. It consists of 28 inverted arbor coils arranged in 28 passes.
The coils are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The
effective length of the coil is 87.3 ft. The coils are placed at a center to center
spacing of 1.27 ft. The radiant heat transfer area is 2,879 ft 2 .
No.3 Interheater (1-44-B-4)
The No.3 Interheater is designed for 13.98 MMBtu/hr duty. This cell is designed to
heat 211,731 lb/hr of feed from 934ºF to 1,010ºF. The feed enters at a pressure of
63 psig and leaves at 61.3 psig. The calculated coil pressure drop is 1.7 psi. The
Furnace Improvements
Low Cost Solutions for Fired Heaters 22