Use of Pressure Fluctuations to Determine Online the Regime of Gas-Solids Suspensions from Incipient Fluidization to Transport

0326815 - ÚCHP 2010 RIV US eng J - Journal Article
Hartman, Miloslav - Trnka, Otakar - Svoboda, Karel
Use of Pressure Fluctuations to Determine Online the Regime of Gas-Solids Suspensions from Incipient Fluidization to Transport.
[Využití tlakových fluktuací k on-line stanovení režimu suspenzí plyn-tuhé částice od prahu fluidace k pneumotransportu.]
Industrial and Engineering Chemistry Research. Roč. 48, č. 14 (2009), s. 6830-6835. ISSN 0888-5885
R&D Projects: GA AV ČR IAA400720701
Institutional research plan: CEZ:AV0Z40720504
Keywords : fluidized beds * fluidization regimes * pressure fluctuations
Subject RIV: CI - Industrial Chemistry, Chemical Engineering
Impact factor: 1.758, year: 2009

An effective monitoring method, based upon measurements and processing the fluctuating pressure signal within a bed, is presented. The developed technique makes it possible to on-line determine the actual hydrodynamic states of a fluidized bed spanning a wide range of operation regimes from the onset of fluidization through vertical pneumatic transport. The procedure employs the Fast Fourier Transform (FFT) of a successive time series of pressure fluctuations, representing the fluidization behavior, and determines the fluidization characteristic of a desired bed. On the basis of this characteristic, the present study provides a qualitative and quantitative classification of modes of fluidization. Experimental measurements were performed in a glass, transparent column with an inner diameter (ID) of 8 cm and height of 600 cm.

Prezentována efektivní monitorovací metoda založená na měření a zpracování tlakových fluktuací ve vrstvě. Postup umožňuje určovat aktuální hydrodynamický režim vrstvy i v průmyslových zařízeních.
Permanent Link: http://hdl.handle.net/11104/0173806