What is Thermal Degradation of DEA? 1

[27may2002]

Hi everybody,

I am going to design a Hot Oil system for our DEA reboiler of a stripper column in an NGL plant.To reduce circulatin rate of heating medium I am thinking to use HM with a high temp.However I am worried about thermal degradation of DEA due to high skin temp.(Bulk temp. of amine is 252F).
Does anyone knows what is the maximum recommended skin temp in a DEA reboiler?

Regards,

27may2002

 

[bchoate]

bchoate
For alkanolamines the maximum recommended bulk temperature is 260 F. The maximum skin temperature is 300 - 325 F. Above 350 F all alkanolamines will thermally degrade. In addition a conservative heat flux for the reboiler of 8,000 btu/hr/sft is recommended by most authorities.
Bill Choate

 

[25362]

50 psig saturated steam is the common reboiler heating source I've seen.