Dynamic Characteristics of Solids Transportation in Rotary Dryers

Song, Yang; Thibault, Jules; Kudra, Tadeusz

doi:10.1081/drt-120021685

Cited by 32 publications

(19 citation statements)

References 6 publications

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“…The same tendency is observed in decreasing the kiln slope as shown in Figure 3b. These results are consistent with previous studies (Liu & Specht, 2006 ;Song et al, 2003). The solid hold-up, the nominal space time, the mean residence time and the standard deviation are summarized in Table 2 for all the experimental runs.…”

Section: Residence Time Distribution Curvessupporting

confidence: 93%

“…These parameters are classically regarded as having an impact on the residence time and the solid hold-up in rotary kilns. The gas flow rate is also an important parameter, when the gas is used as heat carrier (Song et al 2003) or when the air velocity influences solid transportation like in rotary kilns equipped with lifters or processing the solids in a cascading mode (Langrish et al 2007). Here, the nitrogen velocity is low and the influence of the gas-flow rate is neglected.…”

Section: Experimental Designmentioning

confidence: 99%

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Wood chips flow in a rotary kiln: Experiments and modeling

Colin

Dirion

Arlabosse

et al. 2015

Chemical Engineering Research and Design

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Section: Residence Time Distribution Curvessupporting

confidence: 93%

Section: Experimental Designmentioning

confidence: 99%

Wood chips flow in a rotary kiln: Experiments and modeling

Colin

Dirion

Arlabosse

et al. 2015

Chemical Engineering Research and Design

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“…1. [7] For a positive step change, the solids holdup (H P ) was estimated by integrating the area circumscribed between the solids input flow rate (t ¼ 0) and the discharge flow rate (t ¼ t 1 ) curves, as shown in Fig. 1a.…”

Section: Discussionmentioning

confidence: 99%

Hydrodynamic Characteristics of a Pilot-Scale Screw Conveyor Dryer

2007

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This article presents results of an experimental study on the flow characteristics of a pilot-size screw conveyor dryer (SCD). In particular, the effects of granular solids flow rate (15.2-206 kg/h) and screw speed (10.8-28 rpm) on the residence time distribution (RTD) were studied using sand as the model material. The RTD was measured using a dynamic step change in the solids flow rate. Parameters such as solids holdup, degree of fullness, mean residence time, and uniformity of the discharge flow were studied. The solids holdup and hence the degree of fullness was found to decrease with increase in the screw speed and decrease with the solids flow rate. The mean residence time was found to decrease with an increase in the screw speed, as expected. The screw speed and the solids flow rate strongly affected the discharge uniformity. An optimum value of the degree of fullness was observed with regard to the solids flow rate. Over the operating range examined, the solids flow pattern was close to plug flow, as indicated by high values of N and Pe number.

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“…Rotary cylinders are widely used in industrial processes such as drying, heating, humidifying, mixing, and calcining, [1] which is attributed to its treatment flexibility for various particulate solids and its ability to handle large volumes of material continuously. [2,3] In the field of drying operations, the rotary dryer has been used as one of the main dehydration methods for processing food and agriculture products, such as sugar, corn, seeds, and pasture.…”

Section: Introductionmentioning

confidence: 99%