How to determine the flow rates of the agitated slurry and agitating steam at the bottom of a catalytic fractionation tower?
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As the title suggests, what are the basic principles and methods for determining the magnitudes of these two flow rates?
It’s really hard to say for sure. We use pipelines with a diameter of DN80 and the mixing is done at full capacity; in my opinion, the use of mixing steam isn’t very significant. During maintenance checks, we found a lot of coke inside the mixing steam loop, and many of the holes in that loop were blocked
The reasons for blockage of the holes in the steam distribution tubes are nothing other than too low a steam flow rate or overly large holes, which result in too low a pressure difference inside and outside the distribution holes, as well as low flow velocities near those holes
We generally determine the amounts of stirring steam and stirring slurry on a proportional basis, based on the design values and taking into account the amount of processing required
Do you have flow meters on your oil slurry mixing pipelines? We don’t; we use manual valves to control the flow rate
Would it be more effective if I blocked part of the eye of the annular tube near the steam inlet?
It seems that the mixing of the slurry is calculated based on a flow rate of 1.0 m/s for small holes; I’m not entirely sure. I don’t know about the steam used for stirring.
We have flow meters, available for both the steam line and the slurry line
We have a flow meter for the steam used in stirring, but none for the slurry oil