Drying characteristics of low rank coals in a pressurized flash drying system

Gwak, In Seop; Gwak, You Ra; Kim, Ye Bin; Lee, See Hoon

doi:10.1016/j.jiec.2017.08.017

Cited by 10 publications

(2 citation statements)

References 27 publications

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“…From the results, they have reported that the Midilli–Kucuk model showed best fit for nitrogen and super‐heated steam fluidized beds, and the Page model showed best fit for microwave oven (Tahmasebi et al, ). Gwak, Gwak, Kim, and Lee () have performed pressurized flash drying to find drying characteristics of low rank coal particles. They have conducted experimentation with pressure up to 40 bars, gas outlet temperature up to 573 K, particle sizes with a range of 212–300 and 300–355 μm.…”

Section: Introductionmentioning

confidence: 99%

“…They have conducted experimentation with pressure up to 40 bars, gas outlet temperature up to 573 K, particle sizes with a range of 212–300 and 300–355 μm. From their reports, the effect of operating conditions on drying ratio was analyzed and reported that the temperature is more effective than pressure (Gwak et al, ). Khanali, Rafiee, and Jafari () have examined experimental and simulation studies on a plug flow fluidized bed dryer using inert dry solids to determine outlet gas humidity and temperature.…”

Section: Introductionmentioning

confidence: 99%

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Energetic and exergetic analyses of Barnyard millet drying using continuous multistage fluidized bed dryer

Devani

Yelamarthi

2019

J Food Process Engineering

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Most of the exergy studies reported were in batch fluidized bed drying process. The continuous dryer plays a pivotal role in industrial usage. In this study, exergy and energy analyses of multistage fluidized bed drying of Barnyard millet with stages connected externally were examined. The dryer was operated by changing wall temperature of stages (313–328 K), air inlet velocity (1.01–1.3 m/s), downcomer height (50–70 mm), and flow rate of solids (5–10 kg/h). Drying characteristics of Barnyard millet by changing process operating conditions of the dryer, were reported and the energy utilization ratio, exergy loss and exergy efficiency of dryer were also reported. The EUR of dryer at steady state has been found to be in the range of 0.25–0.46 and the maximum exergy efficiency of dryer was observed as 0.64 and lowest as 0.371 in the continuous drying process. Practical Applications Fluidized beds offer many distinct features and advantages for processing of particulate food materials. To decrease the drying time than that for single stage dryers, continuous multistage fluidized bed dryer was introduced. Reducing moisture content from feed materials in continuous dryers while discharging continuously, helps to process large quantity of solid materials with good quality of product. Several dryers with different modifications and designs have been suggested by many earlier investigators but continuous dryers play significant role in particulate industry. The multistage dryer is designed by connecting two or more fluidized beds internally or externally, where each bed is termed as a stage. Advantages of the multistage dryer are improvement in gas–solid axial mixing, which results in good quality of product. Due to stage‐wise contact of solids with gas, dried product with uniform moisture content can be obtained.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%