Verification of the mathematical model of the screen blocking process

Ławińska, Katarzyna; Wodziński, P.; Modrzewski, R.

doi:10.1016/j.powtec.2014.01.074

Cited by 19 publications

(8 citation statements)

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“…There is a significant difference in the results obtained. In case of the vibrating feeder, the forces acting on the fruit are much higher than those acting on the feeder with reciprocating motion [35,36]. In the first case, the average force acting on the fruit after time was 17.4 mN, whereas in case of the reciprocating feeder 11.6 mN, which means that the average value of this force is about 30% lower in comparison with the vibrating feeder.…”

Section: Discussionmentioning

confidence: 99%

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Kryszak

Bartoszewicz²,

Szufa

et al. 2020

Processes

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The application of the Discrete Element Method (DEM) allows simulating the movement of a particle of any shape in a conveyor. The DEM method uses the assumptions of the Lagrange calculation model, in which each particle in the domain is tracked individually. It makes it possible to conduct a thorough examination of the behavior of the entire bulk material bed consisting of a set of elements with characteristic physicochemical properties. Therefore, the deposit is not considered according to averages and constants, e.g., strength values, but as a set of elements that can be described individually. The article presents the results of a simulation, with the use of the Discrete Elements Method (DEM), of the process of soft fruit transport in the food industry. The results of the research and exemplary simulations of blueberry fruit transport are presented. The influence of the type of a transport device on the values of normal and tangential forces occurring between the blueberry fruit and structural elements of the transport device, as well as the interaction between the fruits, were modeled. In addition, based on the amount of energy absorbed by each fruit due to collisions, the analysis of the energy spectrum of collisions of particles was carried out to determine the likelihood of damage to the fruit in transport and to identify the phenomena that favor it.

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Section: Discussionmentioning

confidence: 99%

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Kryszak

Bartoszewicz²,

Szufa

et al. 2020

Processes

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“…Such a low concentration of the agent does not affect the rheological properties of the liquid. After the proper moisture content was reached, granules were screened using sieves, in order to separate the size fractions [30,31]. .…”

Section: The Test Methodologymentioning

confidence: 99%

Spectrophotometric analysis of disintegration mechanisms (abrasion and crushing) of agglomerates during the disc granulation of dolomite

Obraniak

Ławińska²

2017

Granular Matter

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The analysis of mechanisms which affect the formation of agglomerates and determine the granulation process in a broad sense encounters difficulties related to the many ways of the formation of granules. The aim of the study was to perform a qualitative and quantitative analysis of granulation mechanisms with special reference to agglomerates' disintegration in the disc granulation process. This paper contains an analysis of disintegration mechanisms (abrasion and crushing) of agglomerates during the disc granulation of dolomite. The analysis of the mechanisms taking place during the process concerns the granulation stage after wetting. During the research, each time after the wetting stage, the size fraction 10-12.5 mm was substituted with an analogous fraction wetted by means of an aqueous solution of a coloring agent and the process was continued. After the specified time of granulation, the obtained product was sieved through laboratory sieves and then the content of the provided coloring agent in different size fractions was analyzed by means of a spectrophotometer. Measuring the absorbance of the analyzed samples and granulometric composition of the bed, the level and cause of the migration of material of the tested fraction into other size classes were determined, and at the same time, the occurring granulation mechanisms were analyzed. The proposed model and measurement method consisting of determining the absorbance of the tested granulometric fraction enable the qualitative and quantitative analysis of granulation mechanisms are encountered during the carrying-out of the process after wetting the bed.

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“…Factors that depend on the design of the equipment used belong to a second group, and includes the shape and size of the screen openings [5,8,11,12,20,26,27], type and material [5,8], screen inclination angle [2,4,6,11,14,21,26,27], vibration mode (linear, circular, elliptical) [2,7], direction [4,6,14,19,22], vibration amplitude [2,11,14,19,21,27] and frequency [2,4,6,11,14,19,22,27]. The third group includes factors that characterise the sieving/screening process itself, such as mass flow (in the case of a continuous process) or the amount of material fed in (in the case of a batch process) [5,8,11,12,20,22], sieving duration [1,3,16] ...…”

Section: Introductionmentioning

confidence: 99%

Influence of the Selected Sieving Parameters on the Sieving Efficiency of Material MCC Avicel PH102

Jezsó

Peciar

2022

Strojnícky Časopis - Journal of Mechanical Engineering

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Sieving or screening plays a crucial role in the processing of particulate materials. The sieving process is affected by many factors, including the selection of suitable sieving equipment. Several experiments were carried out to examine the influence of three basic sieving parameters on process efficiency. The investigated material was MCC Avicel PH102, which is widely used as an excipient in the pharmaceutical industry. The three mentioned parameters were sample mass, sieving duration, and vibration amplitude. It was necessary to find a suitable method to evaluate screening efficiency.

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Verification of the mathematical model of the screen blocking process

Cited by 19 publications

References 0 publications

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Modeling of Transport of Loose Products with the Use of the Non-Grid Method of Discrete Elements (DEM)

Spectrophotometric analysis of disintegration mechanisms (abrasion and crushing) of agglomerates during the disc granulation of dolomite

Influence of the Selected Sieving Parameters on the Sieving Efficiency of Material MCC Avicel PH102

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