A study of fine particles residence time in a jetting fluidized bed
Experiments were carried out to study the fine particles residence time in a 30-cm diameter laboratory fluidized bed. Fines, -170+230 mesh with an average size of 75 ..mu..m, were injected both radially and coaxially to simulate different fines recycle possibilities in an actual operating unit at two different bed heights and three different bed operating conditions. It was found that the transitory time of fines from the bed surface to the collecting cyclone dipleg and filter dominated the characteristic particle collection times. The experimental results were corrected for this transitory time by solving 25 simultaneous equations to arrive at the true fines residence time in the bed. The true fines residence time in the bed is in the order of 10 to 20 seconds, however, the experimental uncertainties in the current experiments do not allow exact determination of the residence time distribution.
- Research Organization:
- Research and Development Center, Westinghouse Electric Corp., Pittsburgh, PA 15235
- OSTI ID:
- 6417485
- Report Number(s):
- CONF-861146-; TRN: 87-023670
- Resource Relation:
- Conference: AIChE winter annual meeting, Miami, FL, USA, 2 Nov 1986
- Country of Publication:
- United States
- Language:
- English
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