Wall pressure issues in the aeration of bulk material silos

Brázda, Robert; Zegzulka, Jiří

doi:10.1016/j.powtec.2010.09.028

Cited by 3 publications

(7 citation statements)

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“…The wood dusts, from physical and chemical standpoints, belongs to the range of colloidal and dispersed systems for which the linear dimension of the particle is the essential characteristic. Dust is understood to consist of particles of a solid substance that have at least two dimensions smaller than 0.5 mm (Bartknecht 1987). Small linear dimensions lead to a significant increase in the surface area relative to the given mass of the entire system.…”

Section: Experimental Materialsmentioning

confidence: 99%

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Creation of Wood Dust during Wood Processing: Size Analysis, Dust Separation, and Occupational Health

et al. 2015

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Mechanical separators and fabric filters are being used to remove airborne fine particles generated during the processing and handling of wood. Such particles might have a harmful effect on employee health, not only in smallbut also in large-scale wood processing facilities. The amount of wood dust and its dispersion conditions vary according to geometric boundary conditions. Thus, the dispersion conditions could be changed by changing the linear size of the particles. Moreover, the smaller the particles are, the more harmful they can be. It is necessary to become familiar with properties, from a health point of view, of wood dust generated from processing. Wood dust has to be sucked away from the processing area. The fractional separation efficiency of wood dust can be improved using exhaust and filtering devices. Filtration efficiency depends on moisture content, particle size, and device performance. Because of the carcinogenicity of wood dust, the concentration of wood dust in air has to be monitored regularly. Based on the results hereof, a conclusion can be made that both mechanical separators of types SEA and SEB as well as the fabric filters with FINET PES 1 textile are suitable for the separation of wet saw dust from all types of wooden waste produced within the process.

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Section: Experimental Materialsmentioning

confidence: 99%

“…The forces from the neighbouring particles affecting the atoms or molecules in the depth of solid or liquid phases are balanced. However, the forces occurring on the surface interface are not balanced (Brázda and Zegzulka 2011). This is related to the surface tension and surface energy needed to enlarge the surface.…”

Section: Experimental Materialsmentioning

confidence: 99%

Creation of Wood Dust during Wood Processing: Size Analysis, Dust Separation, and Occupational Health

et al. 2015

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“…It is carried out there measuring the intensity of the dispersedand the undispersed laser beam on the detector and then based on the position of detectors, which is the indication ring radius. And the distance measured from the cell detector at a known wavelength of the incident laser beam can be determined by mathematical theory Frankhoferových matrices investigated particle size [10]. Mievovs theory is used for accurate measurement to 1mm and is as opposition to Frankhofers theory and its assumption of the projection area [11].…”

Section: The Laser Analyzer Mastersizer 2000mentioning

confidence: 99%

The Dimensional Characteristics of the Particles of Wood Dust of Selected Deciduous Trees Considering to Explosion

Mračková

Tureková

2016

KEM

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The article is dealing with wood dust particle size problem in consideration of their fire and explosion. The aim of the thesis is statistical evaluation of wooden particles of Palisander (Jacaranda Mimosifolia) and Oak (Quercus robur L.). The samples were taken from the operation of the production furniture, in which dust is formed during the technology. Measurement was carried out by laser analyzer. Measurements were carried out on samples in specific time interval. Values, which were acquired, were evaluated of characteristics of the Weibull Distribution and treated in statistical program. It has been found by means of measurement and evaluation that sample of Palisander (Jacaranda Mimosifolia) has finer grain than sample of Oak (Quercus robur L.), therefore the has greater assumption to the creation of fire and explosions in process at the wood processing. We note in comparison with other sizes of wood particles, that the percentages are comparable.

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“…3b. The calculation was also taken from [7]: however, in contrast to [2], the skewing models according to [3] and [7] are identical. In other words, the model shown in Fig.…”

Section: B Calculation Model As Per čSn 73 0103mentioning

confidence: 99%

“…-with manual travel drive, according to formula (2): Although the procedure used to calculate the forces arising from crane skewing on the runway laid down in [2] is based on [7], the procedures based on the two different sources differ as regards both the physical model of skewing and the relation for the calculation of the transverse force H tpn : this force is determined based on Eq (1) in [7], the sum of forces ΣV n , however, is replaced by the mere wheel pressure V (see [4]).…”

mentioning

confidence: 99%

Action on Crane Runway Caused by Horizontal Forces due to Crane Skewing

Hrabovský

2015

KEM

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Determination of the (residual) lifetime of steel structures of construction, mining and maintenance machines has recently received increased attention, particularly for safety, environmental and economic reasons. One of the problems that are addressed in this context is crane skewing, a phenomenon that directly affects, through friction and wear, the life of the crane guiding structure, and indirectly affects the secondary life of the crane supporting structure.

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Wall pressure issues in the aeration of bulk material silos

Cited by 3 publications

References 0 publications

Creation of Wood Dust during Wood Processing: Size Analysis, Dust Separation, and Occupational Health

Creation of Wood Dust during Wood Processing: Size Analysis, Dust Separation, and Occupational Health

The Dimensional Characteristics of the Particles of Wood Dust of Selected Deciduous Trees Considering to Explosion

Action on Crane Runway Caused by Horizontal Forces due to Crane Skewing

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