Catalytic dead bed
Thread Content
For catalytic dead bed operation, is it necessary to ensure that the reaction pressure is 10 KPa higher than the regeneration pressure? Thank you!
It should be ensured that the reaction pressure is 10 KPa higher than the regeneration pressure.
When the bed is sealed, the main fan stops running – where does the pressure come from?
Catalyst bed becomes deactivated; the main fan of the regenerator stops operating, and the two valves are opened manually. The regenerative and standby slide valves are manually closed, and the catalyst settles in the regenerative and standby inclined tubes to create a material seal. After bed packing, the reaction pressure is definitely greater than the regeneration pressure.
It is mainly to prevent the regenerated flue gas from entering the reactor and causing spontaneous combustion of iron sulfide. And the vapor from the reaction is safe once it enters the regenerator.
Most of the accident steam isn’t put into use, right? Is yours put into use?
1. When purging the bed, it is necessary to maintain the reaction pressure higher than that of the regenerator, with an optimal value of 5–10 KPa. 2. The most crucial thing is to have a material seal between the reactor and the regenerator.
If accident steam is used, the bed temperature cannot be maintained; steam is supplied to the settler to maintain a slight negative pressure of -5 to -10 kp
After starting up with accident steam, the bed-dampening air should be switched back as soon as possible to maintain the temperature of the regenerator; this also helps prevent water in the steam from causing hydrothermal deactivation of the catalyst
If the main air catalyst is not used for injection, what then sustains its fluidization?