Platformer HeaterCapacity Improvement
Furnace Improvements (FIS) was employed by a refinery in California to perform a capacity improvement on a Platformer Heater (H-70-01/02/03).
The heater was originally built in 1979. It was designed for 12 MBPD and rated for 135.58 MMBtu/hr of heat duty and 84.03 MMBtu/hr of process heat duty. The heater was running at 13,000 to 15,000 BPD charge rate.
They were seeking to revamp the heater for 18 MBPD and total process heat duty of 113.01 MMBtu/hr and 160.86 MMBtu/hr of the total heat duty.
The design thermal efficiency of the heater was ~ 88% and was operating at 80- 81%. The stack temperature was higher by almost 300°F than design. The conventional revamp option was to extend the existing radiant cells. Extending the radiant cells has the following disadvantages:
Higher firing rates
Very high cost ( requires radiant tubes and new manifolds)
FIS’ recommended increasing the capacity of the heater using our patented “Split Flow Technology”.
Advantages of revamped design based on split flow are as follows:
Lower heat flux
Lower firing rates
No radiant section modification
No civil works