Determination of cores electrification during the flow in the modified Wurster apparatus

• Autorzy: Ludwig W. , Mączka T.
• Języki publikacji: EN

Abstrakty

EN

The purpose of this paper was presentation of the value of cores electrification during their flow in the modified Wurster apparatus, applied for dry encapsulation of pharmaceutical materials. Previous works of the authors dealt with vulnerability of the particles of different diameter, produced by SYNTAPHARM (Cellets 1000, 700 and 100) on electrification in laboratory conditions. The presented work gives the results of examination on particles electrification in real conditions of their stable circulation in a column. The measurement system, that was applied, allowed determination of electrification potential and electrification current. Those quantities, which are the measures of charge accumulation on cores were determined for several particles (Cellets 1000, 700 and 500) with the different humidity, for different mass of the bed and spouting gas velocities.

Słowa kluczowe

EN

electrification; cores; Wurster; spout-fluid bed

• Wydawca: Wydawnictwo Uniwersytetu Warmińsko-Mazurskiego w Olsztynie
• Czasopismo: Technical Sciences / University of Warmia and Mazury in Olsztyn
• Rocznik: 2017
• Tom: nr 20(1)
• Strony: 5--15
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Ludwig W.

• Zakład Inżynierii Chemicznej, Politechnika Wrocławska, ul. Norwida 4/6, 50-373 Wrocław

autor

Mączka T.

• Senior R&D Specialist, Institute of Power Systems Automation, Wrocław

Bibliografia

• CHENG Y., LAU D.Y.J., GUAN G., FUSHIMI C., TSUTSUMI A., WANG C.H. 2012. Experimental and Numerical Investigations on the Electrostatics Generation and Transport in the Downer Reactor of a Triple-Bed Combined Circulating Fluidized Bed. Industrial and Engineering Chemistry Research, 51: 14258-14267.
• GUARDIOLA J., ROJO V., RAMOS G. 1996. Influence of particle size, fluidization velocity and relative humidity on fluidized bed electrostatics. Journal of Electrostatics, 37: 1-20.
• KARLSSON S., BJOERN I.N., FOLESTAD S., RASMUSON A. 2006. Measurements of the particle movement in the fountain region of a Wurster type bed. Powder Technology, 165: 22-29.
• MĄCZKA T. 2015. Study on the electrostatic properties of cores. Report no. 504-002104-026-ZT/TM-25/2015, Wroclaw Electrotechnical Institute.
• MEHRANI P., BI H.T., GRACE J.R. 2005. Electrostatic charge generation in gas-solid fluidized beds. Journal of Electrostatics, 63: 165-173.
• MOUGHRABIAH W.O., GRACE J.R., BI X.T. 2009. Effects of Pressure, Temperature, and Gas Velocity on Electrostatics in Gas – Solid Fluidized Beds. Industrial Engineering Chemical Research, 48: 320-325.
• PARK A.H., BI H., GRACE J.R. 2002. Reduction of electrostatic charges in gas-solid fuidized beds. Chemical Engineering Science, 57: 153-162.
• SZAFRAN R.G., LUDWIG W., KMIEĆ A. 2012. New spout-fluid bed apparatus for electrostatic coating of fine particles and encapsulation. Powder Technology, 225: 52-57.
• TEUNOU E., PONCELET D. 2002. Batch and continuous bed coating- review and state of the art. Journal of Food Engineering, 53: 325-340.
• WURSTER D.E. 1950. Means of applying coatings to tablets or like. Journal of the American PharmaceuticalAssociation, 48(8): 451.
• WURSTER D.E., LINDLOF J. A. 1966. Particle coating apparatus. US patent, 3241529.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).