Steady state modelling and simulation of an indirect rotary dryer

Canales, Edgardo R.; Bórquez, Rodrigo; Melo, Diógenes L.

doi:10.1016/s0956-7135(00)00027-x

Cited by 20 publications

(17 citation statements)

References 1 publication

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“…The mass flow of the dry soybean meal, M s , was calculated as a function of its initial moisture, X ini , as in equation (25), presented by Canales et al (2000):…”

Section: Energy Balancementioning

confidence: 99%

“…Shene and Bravo (1998) and Strumillo and Kudra (1986) utilized models from the mass and energy balances to obtain a temperature and moisture profile of the solids in this kind of dryer. Canales, Bórquez and Melo (2000) presented a simplified model, in the permanent regime, to simulate fish meal drying, taking into consideration that the drying occurs in the constant rate.…”

Section: Introductionmentioning

confidence: 99%

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Modeling and Energetic Analysis of Soybean Meal Drying in the Indirect Rotary Dryer

Luz¹,

Paraíso²,

Jorge³

et al. 2009

Chemical Product and Process Modeling

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Recommended Citation: Luz, Gianini R.; Paraíso, Paulo R.; Jorge, Luiz M. M.; and Andrade, Cid M. G AbstractThe process of soybean meal industrial drying requires a high consumption of energy, and it is usually performed in an indirect rotary dryer. A study aiming for the reduction of this energy consumption is vital for the competitiveness of this product. Thus, the purpose of this work was to develop a mathematical model of soybean meal drying, in permanent regime, in order to assess the optimal operational conditions of the dryer and its energetic performance. The developed model is based on balances of mass and energy, and using constitutive and empirical equations. The model validation was carried out through operational data. From this, the influences of the initial temperature, initial moisture, and relative humidity of air, as well as the dryer energetic performance, were investigated.

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“…The mass flow of the dry soybean meal, M s , was calculated as a function of its initial moisture, X ini , as in equation (25), presented by Canales et al (2000):…”

Section: Energy Balancementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modeling and Energetic Analysis of Soybean Meal Drying in the Indirect Rotary Dryer

Luz¹,

Paraíso²,

Jorge³

et al. 2009

Chemical Product and Process Modeling

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“…A modelagem matemática genérica do secador industrial rotativo com aquecimento indireto foi estudada por alguns autores, tais como Strumillo e Kudra (1986) e Shene e Bravo (1998), que utilizaram modelos provenientes de balanços de massa e energia para a obtenção de perfis de temperatura e umidade do sólido ao longo desse tipo de secador. Além destes, Canales et al (2000) apresentaram um modelo simplificado, em regime permanente, para simular a secagem de farelo de peixe, considerando que a secagem ocorre à taxa constante. Acta Sci.…”

Section: Introdução Introdução Introduçãounclassified

Análise energética da secagem de farelo de soja em secador rotativo indireto

Luz¹,

Andrade²,

Jorge³

et al. 2006

Acta Sci. Technol.

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“…In practice, this means decreasing the moisture content below 12%, which generally may be considered low enough to check microbial activity, but not lower than 6% to avoid elimination of proteins [6].Two main types of rotary disk dryer are used for this end: the direct and indirect rotary disk dryer.…”

mentioning

confidence: 99%

“…The direct rotary dryer works under the convection heat transfer principle, and although, it has been used for several years due to its high efficiency transfer of heat and mass, it has the drawback that produces a series of reactions and deterioration of the meal [6]. Opposite to this, the indirect rotary dryer improves the quality of the final product, avoiding the contamination of the meal with the ash contained in the combustion gases.…”

mentioning

confidence: 99%

Modeling and Nonlinear Model Predictive Control of a rotary disc dryer for fishmeal production

Hernández

Keyser

Manrique

et al. 2014

2014 European Control Conference (ECC)

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This paper presents the dynamic modeling and control of a rotary disc dryer used in fishing industry. The nonlinear model obtained from energy and mass balances, is validated with real data measured in two plants of fishmeal located in the north of Perú. A constrained nonlinear predictive controller is designed with the purpose of regulating the moisture content in the fishmeal to obtain a stable final product. Simulation results are shown to illustrate the effectiveness of the controller to handle input, slew-rate and output constraints even for the case of short prediction horizons. I. INTRODUCTIONRIYING technology is a major energy consumer used in many industries, including agriculture, food, polymer, wood, and others. Drying aims at reducing the moisture content within a product by application of thermal energy to produce dried products of desired attributes.It has been noticed that the major cost of dryers is not the initial investment (design and assembly) but in the daily operation. Concerning the energy consumption, drying is a highly energy-intensive operation. Moreover, it is also known that a majority of industrial dryers operate at low energy efficiency, from a disappointing 10% to a respectable 60% (this ratio is defined as the theoretical energy required for the drying to the actual energy consumed). Therefore, due to the escalating energy costs and more intensive global competition, these performances have to be improved. Control appears as an important tool to save energy and to obtain a more reliable and cost effective production [1].In general, drying is a process mainly governed by transfer of heat and mass [2]. Among the different types of dryers available, the rotary dryer is more frequently used in practice; therefore,its modeling and control is important. Although, previous research has been performed in modeling and control of rotary dryers [3][4][5], there are scarce publications of rotary disk dryers related to the fishmeal production.The process to obtain fishmeal begins with cooking the fish in a continuous cooker. This process coagulates the protein and ruptures the cell walls to release the water and

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Steady state modelling and simulation of an indirect rotary dryer

Cited by 20 publications

References 1 publication

Modeling and Energetic Analysis of Soybean Meal Drying in the Indirect Rotary Dryer

Modeling and Energetic Analysis of Soybean Meal Drying in the Indirect Rotary Dryer

Análise energética da secagem de farelo de soja em secador rotativo indireto

Modeling and Nonlinear Model Predictive Control of a rotary disc dryer for fishmeal production

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