2 replies to this topic

[kkay]

Hi everyone,

 

 

i'm doing a project about fired heaters, checking how big are the gains in efficiency when the convection section gets a chemical cleaning.

 

The system is a cylindrical heater with vertical coil, has convection section with studded tubes and has dual fuel burners (fuel gas and fuel oil). I was checking the background data about the flue gases temperature at the stack and at the bridgewall and i found that when the cleaning occurs both temperatures drop. And that drop is more significant in the bridgewall  that in the stack.

 

I thought that the bridgewall temperature after the cleaning would remaing the same. what is the reason for the bridgewall drop?

 

 

Thanks

 

[Tube Tech International]

Hi there

Gains in efficiency can be higher by using robotic cleaning technology. Unlike chemical cleaning the robot provides 360 degree surface contact ensuring fouling removal throughout the fired heater.

Let me know if you need more info.

Thanks

Simone

Tube Tech International

[GSaikrishn]

is the process coil entering into the convection zone first and then the radiant section. If that is the case, if the convection zone is cleaned, the process side will recover more heat and the duty requirement in the radiant zone will come down, so the firing duty will come down as the heater is trying to maintain the coil outlet temperature. So lower the firing duty, lower will be the BWT