Standpipe models for diagnostics and control of a circulating fluidized bed

Journal Article · Tue Jan 01 04:00:00 UTC 2013 · Powder Technology

DOI:https://doi.org/10.1016/j.powtec.2013.01.016· OSTI ID:1126779

Ludlow, James C. ^[1]; Panday, Rupen ^[2]

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1. retired
2. REM Engineering PLLC

Two models for a Circulating Fluidized Bed (CFB) standpipe were formulated, implemented and validated to estimate critical CFB operational parameters. The first model continuously estimates standpipe bed height using incremental pressure measurements within the standpipe. The second model estimates variations in the void fraction along the standpipe using the Ergun equation in conjunction with the overall pressure drop across the bed, solids circulation rate and the standpipe aeration flows introduced at different locations of the pipe. The importance of different standpipe parameters obtained from these models is discussed in terms of successful operation of the overall CFB system. Finally, the applications of these models are shown in improving the solids circulation rate measurement and in calculating riser inventory.

• Research Organization: National Energy Technology Laboratory - In-house Research; National Energy Technology Laboratory (NETL), Pittsburgh, PA, and Morgantown, WV (United States)
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• OSTI ID: 1126779
• Report Number(s): NETL-PUB-252
• Journal Information: Powder Technology, Journal Name: Powder Technology Vol. 242; ISSN 0032-5910
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
circulating fluidized bed
multi-phase gas solids flow
sandpipe pressure profile
solids circulation rate
standpipe bed height