FIS-483 Consolidated Engineering Study Report
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Marathon Petroleum Company, Catlettsburg Refinery, KY<br />
Capacity Improvement <strong>Study</strong> of LPCCR Platformer Heater (1-44-B-1/2/3/4)<br />
radiant heat flux is 12,700 Btu/hr.ft 2 . The radiant tubes have a maximum metal<br />
temperature of 1,125°F.<br />
The Charge heater has 41.9 ft high, 38.14 ft long and 17.94 ft wide inside insulation<br />
dimensions. It consists of 28 inverted arbor coils arranged in 28 passes. The coils<br />
are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The effective<br />
length of the coil is 87.3 ft. The coils are placed at a center to center spacing of<br />
1.27 ft. The radiant heat transfer area is 2,879 ft 2 .<br />
No.1 Interheater (1-44-B-2)<br />
The No.1 Interheater is designed for 37.46 MMBtu/hr duty. This cell is designed to<br />
heat 211,731 lb/hr of feed from 801ºF to 1,010ºF. The feed enters at a pressure of<br />
71.8 psig and leaves at 69.8 psig. The calculated coil pressure drop is 2 psi. The<br />
process fluid mass velocity is 23.8 lb/sec.ft 2 . The average radiant heat flux is<br />
10,065 Btu/hr.ft 2 and the maximum radiant heat flux is 14,090 Btu/hr.ft 2 . The<br />
radiant tubes have a maximum metal temperature of 1,130°F.<br />
The No.1 Interheater has 54.47 ft high, 38.14 ft long and 15.05 ft wide inside<br />
insulation dimensions. It consists of 28 inverted arbor coils arranged in 28 passes.<br />
The coils are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The<br />
effective length of the coil is 112.85 ft. The coils are placed at a center to center<br />
spacing of 1.27 ft. The radiant heat transfer area is 3,723 ft 2 .<br />
No.2 Interheater (1-44-B-3)<br />
The No.2 Interheater is designed for 28.7 MMBtu/hr duty. This cell is designed to<br />
heat 211,731 lb/hr of feed from 852ºF to 1,010ºF. The feed enters at a pressure of<br />
68.2 psig and leaves at 66.2 psig. The calculated coil pressure drop is 2 psi. The<br />
process fluid mass velocity is 23.8 lb/sec.ft 2 . The average radiant heat flux is 9,970<br />
Btu/hr.ft 2 and the maximum radiant heat flux is 13,960 Btu/hr.ft 2 . The radiant tubes<br />
have a maximum metal temperature of 1,125°F.<br />
The No.2 Interheater has 41.9 ft high, 38.14 ft long and 16.1 ft wide inside<br />
insulation dimensions. It consists of 28 inverted arbor coils arranged in 28 passes.<br />
The coils are 4” NPS x Sch 40. The coils are made of A335 Gr P9 material. The<br />
effective length of the coil is 87.3 ft. The coils are placed at a center to center<br />
spacing of 1.27 ft. The radiant heat transfer area is 2,879 ft 2 .<br />
No.3 Interheater (1-44-B-4)<br />
The No.3 Interheater is designed for 13.98 MMBtu/hr duty. This cell is designed to<br />
heat 211,731 lb/hr of feed from 934ºF to 1,010ºF. The feed enters at a pressure of<br />
63 psig and leaves at 61.3 psig. The calculated coil pressure drop is 1.7 psi. The<br />
Furnace Improvements<br />
Low Cost Solutions for Fired Heaters 22
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