2 replies to this topic

[Alaa55]

Dear Colleagues,

We are currently investigating an incident involving one of our multiple convection heaters. During this event, the process outlet temperature exceeded the design limits for both the heater and the associated piping.

While we initially considered potential causes such as low process flow, excessive heat input, or malfunctioning fuel control valves, a sharp increase in process flow during the overshoot event makes these less likely.

A plausible explanation is that one of the two tube heating paths within the heater may have become partially or fully blocked. This blockage could have led to localized overheating, and once the blockage was cleared, the increased flow through the previously restricted path caused a sudden spike in outlet temperature.

Unfortunately, the absence of temperature and flow sensors on individual heating paths limits our ability to directly confirm this hypothesis.

We seek your expert advice on the credibility of this scenario and potential strategies to ensure the safe operation of the heater.

Thank you for your valuable insights.

Edited by Alaa55, 27 October 2024 - 10:29 AM.

[breizh]

Hi,

Could an infra-red camera be a support to your investigation? You will see hot spot and temperature spike?

Breizh

[Alaa55]

Unfortunately this event occured weeks ago.