Reactor Vessels Flashcards
1
Q
Which reactor is more efficient- PFR or CSTR?
A
PFR
spacially efficient
shorter residence time
smller volume
2
Q
What are the most common PFRs in water treatment?
A
Packed bed type
GAC reactor
sand filtration
Trickling filter
3
Q
Do reactors work in ideal or non ideal conditions?
A
Non ideal
Portion of flow does not remain in reactor for time required for reaction to go to completion
4
Q
What does non ideal conditions do to the mixing and hydraulic conditions?
A
Short circuiting- water bypasses normal route so shorter residence time.
Dead zones- Effective volume is smaller than reactor volume.
Recirculation
5
Q
How to improve PFR performance?
A
Distribute flow evenly at inlet and outlet
Serpentine flow through basin (not for sedimentation)
