Reboiler Trim Heaters Efficiency Improvement

There were two trim heaters, Stripper and Stabilizer Reboiler Trim Heaters, in the reforming plant.

The heaters were originally designed for a heat duty of 12 and 13.8 MM Btu/hr respectively. The convection sections in these heaters were in a bad state. They were operating at very low efficiency.

Furnace Improvements not only increased the capacity of the heaters but also improved their efficiency.

Trim Heaters Revamp

Parameter	Units	Before Revamp	After Revamp
Heat Duty	MM Btu/hr	13.78	15.14
Heat Release	MM Btu/hr	18.06	18.29
Efficiency	%	76.4	83.2
Stack Temp.	°F	813	572

 

Parameter	Units	Before Revamp	After Revamp
Heat Duty	MM Btu/hr	12	13.20
Heat Release	MM Btu/hr	16.13	16.10
Efficiency	%	74.4	82.0
Stack Temp.	°F	832	575

FIS carried out process design, detailed engineering, fabrication drawings, engineering specifications and material requisitions and also supervised the field activities. The heaters are running with the enhanced capacity & efficiency since October 2002.