Optimum control of fluidised bed dryer by electrical capacitance tomography. Part 1: Moisture measurement

• Autorzy: Wang H. G. , Senior P. , Mann R. , Yang W. Q.
• Języki publikacji: EN

Abstrakty

EN

This is the first part of a paper, presenting online moisture measurement of a fluidised bed drying process based on online moisture measurement by ECT. From the adjacent electrode pairs of ECT, the water content of the particles is estimated based on correlation between the moisture content and the permittivity value. To compare and validate the noisture measurement by ECT, a simple mathematical model has been developed based on the temperature and relative humidity (RH) of the outlet air phase. To improve the image quality and reduce the imaging error, the Landweber iteration method is applied.

Słowa kluczowe

EN

fluidised bed dryer; ECT; moisture measurement; mathematical model

• Wydawca: Wydawnictwo Politechniki Łódzkiej
• Czasopismo: Zeszyty Naukowe. Elektryka / Politechnika Łódzka
• Rocznik: 2009
• Tom: z. 114
• Strony: 23--27
• Opis fizyczny: Bibliogr. 10 poz.

Twórcy

autor

Wang H. G.

autor

Senior P.

autor

Mann R.

autor

Yang W. Q.

• School of Electrical and Electronic Engineering, The University of Manchester, UK,

Bibliografia

• KING R.J., KING K.V., WOO K., (1992), Microwave moisture measurement of grains, IEEE Transaction on Instrument and Measurement, Vol. 41, pp 111-115.
• PERRY R.H., GREEN D., MALONEY J.O., (1985), Perry's Chemical Engineering's handbook, McGraw-Hill, New York.
• PAIN C.C, MANSOORZADEH S., OLIVERIRA C.R.E., (2001), A study of bubbling and slugging fluidised beds using the two-fluid granular temperature model. International Journal of Multiphase Flow., Vol. 27, pp 527-551.
• RANTANEN J., LEHTOLA S., RÄMET P., MANNERMAA J.P., YLIRUUSI J., (1998), On-line monitoring of moisture content in an instrumented fluidized bed granulator with a multi-channel NIR moisture sensor. Powder Technology, Vol. 99, pp 163-170.
• VILLEGAS J.A., LI M., DUNCAN S.R., WANG H.G., YANG W.Q., (2008), Control of moisture content in a batch fluidized bed dryer using tomographic sensor, American Control Conference, 11 June 2008, Seattle, Washington, USA (accepted).
• WANG H.G., (2007), The procedure of calculating the solid phase moisture (Xp) from the relative humidity (RH) of outlet gas phase, Project Report, The University of Manchester.
• WANG H.G., DYAKOWSKI T., SENIOR P., RAGHAVAN R.S., YANG W.Q., (2007), Modelling of batch fluidised bed drying of pharmaceutical granules, Chemical Engineering Science., Vol. 62, pp 1524-1535.
• WANG H.G., YANG W.Q., SENIOR P., RAGHAVAN R.S., DUNCAN S.R., (2008), Investigation of batch fluidised bed drying by mathematical modelling, CFD simulation and ECT measurement, AlChE Journal, Vol. 54, pp 427-444.
• YANG W.Q., CHONDRONASIOS A., NATTRASS S., NGUYEN V.T., BETTING M., ISMAIL I., MCCANN H., (2004), Adaptive calibration of a capacitance tomography system for imaging water droplet distribution, Flow Measurement and Instrumentation, Vol. 15, pp 249-258.
• YANG W.Q., PENG L.H. (2003), Image reconstruction algorithms for electrical capacitance tomography, Measurement Science Technology, Vol. 14, pp R1-R13.