TRU-SCAN® Reactor & Cyclones
 Benefits of a TRU-SCAN®
- Provides bed level heights, which can affect the efficiency of primary and secondary cyclones
- Identifies a problem cyclone providing evidence for customers to make critical operating decisions
Excessive loss of catalyst through the Reactor cyclones is a common problem.
Identifying the reason for the loss is often difficult. The use of a TRU-SCAN®
can be a powerful tool for gathering needed information about the problem.
A TRU-SCAN® can be applied to check the catalyst disengagement zone
(distance between the primary cyclone inlet and the dense catalyst bed).
A high bed level reduces the disengagement space and increases catalyst
loadings to the cyclones and catalyst loss. However, low bed level may
also cause problems. Since for some cases the catalyst level seals the
cyclone diplegs, the bed height is extremely important to prevent vapor
flowing up the cyclone dip legs and disrupting cyclone operation. 
When properly aligned, a TRU-SCAN® of a Reactor can locate the catalyst
level in the dip leg. High or low catalyst levels can indicate a problem
with flapper valves. Occasionally, a cyclone is found full of catalyst
due to a blocked dip leg. Scan results provide confirmation of the problem
cyclone so that critical operating decisions can be made.
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