2 replies to this topic

[kaidlut]

Dear forummembers：

 

Recently，one question puzzled me a lot. For SMR plant, if the reform steam carryover liquid drop, can this cause a reformer tube hot band problem? for example: Steam drum demister Or sour water stripping tower demister degradation.

 

As I mentioned in another post, there was steam carrying liquid from the sour water stripping tower several times. https://www.cheresou...tripping-tower/

 

Several temperature thermocouples along the line captured the temperature drop, The temperature at the end is above the saturation temperature, but I suspect there is a measurement blind spot. Is this possible?

Edited by kaidlut, 07 August 2025 - 01:52 AM.

[Pilesar]

In a SMR (steam methane reformer) reactor, the reaction is endothermic. The outside of the tube is heated and the reaction takes place inside the tubes filled with catalyst. The reaction in the tubes absorbs the heat and cools the tube metal. If the reaction in the tubes is insufficient or the heat transfer surface is fouled, then the tube metal more closely approaches the furnace temperature. It may be that process upsets damaged the catalyst which reduced the reaction rate and will require a catalyst change. The tubes will stretch (creep) and thin at an accellerated pace as the metal temperature increases. A weak tube can begin to leak -- adding uncontrolled fuel and flame inside the furnace and resulting in much higher maintenance cost.The feed to the tubular reactor is designed to be distributed evenly among the many tubes. The distributor design is based on all feed being a vapor. If the feed contained slugs of liquid, then the liquid would not have been distributed evenly amongst the tubes.

[breizh]

Hi,

Consider this link:

STEAM REFORMER

Breizh