Multi-phase flow measurements in powder processing

Williams, Richard A; Xie, Chenggang; Dickin, F.J.; Simons, S.; Beck, M.S.

doi:10.1016/0032-5910(91)80033-f

Cited by 42 publications

(12 citation statements)

References 45 publications

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“…Various experimental techniques have been proposed for instantaneous and local measurements of solids dispersions. Capacitance probes measure either cross-sectional average or local solids concentration (Irons and Chang, 1983;Soong et al, 1995;Williams et al, 1991), fiber optic probes measure either solids velocity or concentration (Dyakowski and Williams, 1993;Herbert et al, 1994;Li et al, 1991;Reh and Li, 1990;Sobocinski et al, 1995) and the Laser-Doppler technique measures solids and/or gas velocities (Hamdullahpur, 1985;Werther et al, 1991;Yang et al, 1993). None of these techniques can, however, be applied to pilot and industrial plants.…”

Section: Introductionmentioning

confidence: 97%

Evaluation of gas‐solids mixing chamber through cross correlation and Hurst's analysis

et al. 1997

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Fast circulating jluidized-bed reactors are used for many applications, both in riser and downer modes. Typical residence times are in the order of a few hundreds of milliseconds. A good understanding of initial gas-solids contact must be reached to realize the full potential of such reactors. Effective and stable gas-solids miring chambers were identified from the signals of simple and robust probes, which could be used in industrial and pilot plants. Criteria based on cross correlation or Hurst anabsis provided consistent results. Although this study used simplified momentum probes, the criteria it developed can be applied to the signal of any fast-response sensor which is affected by local hydrodynamics. Temperature, capacitance, ultrasonic, or y -ray absorption measurements could be used. Gas or liquid-liquid miring chambers could also be optimized with the same criteria.

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Section: Introductionmentioning

confidence: 97%

Evaluation of gas‐solids mixing chamber through cross correlation and Hurst's analysis

et al. 1997

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“…They have estimated the mass flow rate directly or by two separate measurements of concentration and velocity; each one of them showing strengths and weaknesses. Several mass flow meters have been developed based on different principles such as ultrasound, capacitance, electrostatics, pressure, microwave, tomography and so on [3][4][5] though none of them has become a standard for mass flow rate measurement in industry.…”

Section: Introductionmentioning

confidence: 99%

Air mass balance for mass flow rate calculation in pneumatic conveying

Arakaki

Ghaderi²,

Sæther

et al. 2010

Powder Technology

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“…There are sensors based on a variety of sensing principles such as capacitance [2] , modulation/attenuation of ultrasonic waves, radiation [3,4] , or optics [5,6] . However, these sensors are lack of sufficient sensitivity.…”

Section: Introductionmentioning

confidence: 99%