An RTD study for the flow of lignite particles through a pilot rotary dryer. Part I: Bare drum case

Hatzilyberis, KS; Androutsopoulos, GP

dc.contributor.author	Hatzilyberis, KS	en
dc.contributor.author	Androutsopoulos, GP	en
dc.date.accessioned	2014-03-01T01:14:24Z
dc.date.available	2014-03-01T01:14:24Z
dc.date.issued	1999	en
dc.identifier.issn	0737-3937	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13047
dc.subject	Allothermal (indirect heat) gasification plant	en
dc.subject	Particle size segregation	en
dc.subject	Residence time	en
dc.subject	Rotary kiln	en
dc.subject	Rotating drum	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Dryers (equipment)	en
dc.subject.other	Flow of solids	en
dc.subject.other	Gasification	en
dc.subject.other	Industrial plants	en
dc.subject.other	Lignite	en
dc.subject.other	Particles (particulate matter)	en
dc.subject.other	Phase separation	en
dc.subject.other	Rotary kilns	en
dc.subject.other	Rotational flow	en
dc.subject.other	Allothermal gasification plants	en
dc.subject.other	Bare drum case	en
dc.subject.other	Particle size segregation	en
dc.subject.other	Residence time distribution	en
dc.subject.other	Rotating drums	en
dc.subject.other	Mass transfer	en
dc.subject.other	dryer	en
dc.subject.other	flow	en
dc.subject.other	gasification	en
dc.subject.other	lignite processing	en
dc.subject.other	particle size analysis	en
dc.subject.other	residence time	en
dc.title	An RTD study for the flow of lignite particles through a pilot rotary dryer. Part I: Bare drum case	en
heal.type	journalArticle	en
heal.identifier.primary	10.1080/07373939908917567	en
heal.identifier.secondary	http://dx.doi.org/10.1080/07373939908917567	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	In Part I of the present work a pilot rotating cylindrical drum, without an internal lifting flight system (bare), has been employed for the study of lignite motion through it, at ambient temperature. Tracer pulse stimulus - response experiments have been carried out to deduce residence time distribution (RTD) data and relate them to the operating conditions (slope, speed of revolution, etc.). Mean residence time, space-time and solids bold-up have been correlated with the drum operating conditions. Experimental data of mean axial velocity of solids have been compared with theoretical predictions and found to deviate within a ± 15% margin. A size segregation of particles during their motion through the kiln under a variety of operating conditions has been confirmed and quantified. An average maximum divergence of 20% between the residence time of the smallest and that of the largest nominal particle sizes has been assessed.In Part I of the present work a pilot rotating cylindrical drum, without an internal lifting flight system (bare), has been employed for the study of lignite motion through it, at ambient temperature. Tracer pulse stimulus - response experiments have been carried out to deduce residence time distribution (RTD) data and relate them to the operating conditions (slope, speed of revolution, etc.). Mean residence time, space-time and solids held-up have been correlated with the drum operating conditions. Experimental data of mean axial velocity of solids have been compared with theoretical predictions and found to deviate within a ± 15% margin. A size segregation of particles during their motion through the kiln under a variety of operating conditions has been confirmed and quantified. An average maximum divergence of 20% between the residence time of the smallest and that of the largest nominal particle sizes has been assessed.	en
heal.publisher	Marcel Dekker Inc, New York, NY, United States	en
heal.journalName	Drying Technology	en
dc.identifier.doi	10.1080/07373939908917567	en
dc.identifier.isi	ISI:000080188000006	en
dc.identifier.volume	17	en
dc.identifier.issue	4-5	en
dc.identifier.spage	745	en
dc.identifier.epage	757	en