Predictive models of circulating fluidized bed combustors. 14th Technical progress report
- Illinois Institute of Technology, Chicago, IL (United States). Dept. of Chemical Engineering
The overall objective of this investigation is to develop experimentally verified models for circulating fluidized bed (CFB) combustors. Sorption of SO{sub 2} with calcined limestone was studied in a PYROFLOW type CFB loop at conditions approximating those found in a CFB combustor. Initially the CFB loop contained 150 micron CaO particles of a density of 3.3 g/CM{sup 3} and air at 1143{degrees}K and 3.25 atm. At zero time, air containing 600 ppm SO{sub 2} was introduced into the riser bottom at 1143{degrees}K. The effect of gas velocity, sorbent inventory and inlet pressure on the sorption of SO{sub 2} were studied isothermally by running hydrodynamic code with the SO{sub 2} sorption conservation of species equation. At a velocity of 5m/sec., reported to be a typical velocity by PYROPOWER, there is reasonably good SO{sub 2} removal. At 10 m/sec the SO{sub 2} removal is poor. The best SO{sub 2} removal is for a velocity of 5 m/s and a high bed inventory, initial bed height, H = 9m. Most of the SO{sub 2} is removed in the first two meters of the reactor. However, the SO{sub 2} removal is not complete at the bed outlet due to mixing. At the left wall of the reactor (wall opposite the solids inlet) the SO{sub 2} removal was poor due to gas bypassing caused by the asymmetrical solids inlet. Simulation of the PYROPOWER loop with a symmetrical inlet gave us an order of magnitude improvement over the conventional PYROPOWER system.
- Research Organization:
- Illinois Inst. of Tech., Chicago, IL (United States). Dept. of Chemical Engineering
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG22-89PC89769
- OSTI ID:
- 10191058
- Report Number(s):
- DOE/PC/89769-T17; ON: DE95001958; TRN: 94:010083
- Resource Relation:
- Other Information: PBD: Feb 1993
- Country of Publication:
- United States
- Language:
- English
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