FIS-483 Engineering Study Report R1.03.11.19
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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 />
3.1.3 Offtake Ducts and Stack<br />
The flue gas leaving the convection section enters the<br />
stack through two offtake ducts and is discharged into<br />
the atmosphere. Each offtake duct has a cross-section<br />
of 9.14 ft x 5.47 ft. The flue gas velocity in the offtake<br />
duct is 11.3 ft/s. The breaching is lined with 3” thk.<br />
Kaolite 2200 and offtake ducts are lined with 2” thk.<br />
Kaolite 2200.<br />
The stack is located at the top of the convection section<br />
and is self-supported. The length of the stack is 120 ft<br />
and the inside insulation diameter is 11.21 ft. Top of<br />
stack elevation is 213 ft. The stack is provided with a<br />
multi-blade damper with pneumatic actuator to control<br />
the draft. The damper blade and shaft are made up of<br />
SS-304 material. The stack is lined with 2” thk. Kaolite<br />
2200. The flue gas duct from the adjacent Debutanizer<br />
Reboiler connects the Platformer heater stack 5 ft<br />
above the stack damper. The debutanizer flue gas duct<br />
diameter is 2’ -7”.<br />
Refer to <strong>FIS</strong>-<strong>483</strong>-CIS-1001 (Sheets 1 and 2 of 2) for Existing Design Coil and<br />
Insulation Summary.<br />
Refer to <strong>FIS</strong>-<strong>483</strong>-PFD-1001 for Existing Design Process Flow Diagram.<br />
Furnace Improvements<br />
Low Cost Solutions for Fired Heaters 28
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