Model predictive control of a fluidized bed dryer with an inline NIR as moisture sensor

Quiñones, Luis Obregón; Quiñones, Leonel; Velázquez, Carlos

doi:10.1016/j.conengprac.2012.11.002

Cited by 33 publications

(16 citation statements)

References 16 publications

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“…The factors that are wanted to improve are the rate of drying and the solid flow profiles in the fluidized bed. It is necessary to avoid granulometric changes in the particles [7] and dead zones that cause dust adhesion.…”

Section: Introductionmentioning

confidence: 99%

CFD analysis of a continuous powder dryer with inclined metal sheets

Quiones¹,

Prez²,

Salgado³

2018

IJCTR

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A continuous powder dryer of inclined metal sheets was designed and simulated using computational fluid dynamics. This dryer suggests an alternative for the drying of lactose in the pharmaceutical and food industry where there are high control requirements for moisture content. The dryer was designed to process the granular material over a wide range of particle sizes. The dryer dimensions are calculated by the particle entrainment theory to obtain the terminal particle velocity. CFD simulations were performed by feeding the air in the front and the back of the metal sheets with inclination angles of 40°, 50°, and 60° angles.The results of these simulations indicate that the velocity profiles with the best contact air-solid were obtained using the configuration of 60° inclination angle.

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Section: Introductionmentioning

confidence: 99%

CFD analysis of a continuous powder dryer with inclined metal sheets

Quiones¹,

Prez²,

Salgado³

2018

IJCTR

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“…In general dryers are equipment commonly used to remove water or certain solvents from powders such as those used in industries such as pharmaceutical [1], chemical [2], metallurgical [3], food [4], ceramics [5], agriculture [6], among others. Most of them use a continuous flow of gas to disperse the particles through a confined space to increase the surface area of contact increasing as well the drying.…”

Section: Introductionmentioning

confidence: 99%

“…The factors that are wanted to improve are the rate of drying and the solid flow profiles in the fluidized bed. It is necessary to avoid granulometric changes in the particles [1] and dead zones that cause dust adhesion. There are other important factors to consider when selecting the type of drying method such as the type of material to be dried and the conditions that are required for the process, such as production time, costs, final product conditions, among others.…”

Section: Introductionmentioning

confidence: 99%

Design, construction, and start-up of an inclined sheet continuous powder dryer

Salgado¹,

Perez²,

Quiñones³

et al. 2018

ces

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It was designed a continuous powder dryer of inclined metal sheets that is an alternative for the drying of lactose in the pharmaceutical and food industry where there are high control requirements for moisture content. However, the dryer can be used to dry any type of wet solid. The dryer was designed to process the granular material over a wide range of particle sizes. The air velocity used in the experiments were lower terminal particle velocity to avoid particle drag. The experiments were compared with CFD simulations. The results of the simulations helped to explain the results obtained experimentally. The best contact air-solid were obtained using the configuration of 60° inclination angle. With this arrangement, the air reduces the loss of energy caused by the sheet friction maintaining its high velocity.

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“…There are different drying processes used in the industry that depend on the type of material to be dried, the mechanism of drying accepted, and the conditions that are required for the process [1,2]. Drying processes in fluidized beds are usually preferred to favor the fluidity on the final product [3] and to obtain a high production by decreasing the operating times [4]. On the other hand, when carrying out the drying procedures using a fixed bed, the most common types of dryers are the tray dryers [5], where the contact surface is usually increased by decreasing the thickness of the layer of the wet powder to be dried.…”

Section: Introductionmentioning

confidence: 99%

Effect of the operating conditions in the drying of anhydrous lactose in a square fixed bed dryer

Quiñones¹,

Ochoa²,

Forero³

2018

ces

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Drying is a very important unit operation highly used in the chemical, pharmaceutical, food industries, among others. In the present research project, a laboratory-scale square fixed bed dryer was built to dry anhydrous lactose. The parameter studied was the humidity of the lactose in different zones of the dryer to analyze the behavior of the convection and conduction process inside the equipment. A conduction heat transfer rate at the bottom of the dryer of 0.8 KW was applied through electrical resistances, and a convection heat transfer rate of 0.7 KW was transmitted through hot air of a blower. Profiles of humidity were obtained as a function of time, measuring the dry and wet bulb temperatures at the entry and exit of the air. The variable of highest influence in the drying process was the flow through the hoses. The small induced air flow despite having a relatively lower temperature than the inside temperature of the solid in the container, helps to increase the porosity of the powder and therefore to improve the drying contact area air-wet solid.

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Model predictive control of a fluidized bed dryer with an inline NIR as moisture sensor

Cited by 33 publications

References 16 publications

CFD analysis of a continuous powder dryer with inclined metal sheets

CFD analysis of a continuous powder dryer with inclined metal sheets

Design, construction, and start-up of an inclined sheet continuous powder dryer

Effect of the operating conditions in the drying of anhydrous lactose in a square fixed bed dryer

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