Temat: particle agglomeration - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: An Overview of Particle Agglomeration Techniques to Waste Utilization
Autorzy:: Borowski, Gabriel
Powiązania:: https://bibliotekanauki.pl/articles/1955573.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: particle agglomeration
utilization
waste
Opis:: Particulate materials and waste from industrial processes are troublesome in storage, transport and utilization, mainly due to their large volume and dusting. Therefore, originally the main reason for developing the agglomeration processes was to eliminate the afore-mentioned disadvantages. However, the modifications introduced to the merging processes of materials enabled obtaining a new type of products widely used in various applications. For the agglomeration of the inorganic materials, often containing hazardous substances, the disposal and transformation technologies are available for the safe products that can be used, for example, in civil engineering and construction. In turn, the agglomeration of the materials containing organic substances or fine coal, producing alternative fuels for energy recovery. Obviously, the combustion of these fuels results in a subsequent generation of waste in the form of bottom and fly ash, but they can be successfully further agglomerated to produce more valuable products. The numerous examples of the use of various agglomeration techniques to complete utilization of fine grains was shown. An additional effect of the agglomeration processes was also the fulfilment of the economy criteria, which matches with the principles of sustainable development of the environment. Supporting by worldwide literature, the selected agglomeration techniques were discussed, such as: solidification, granulation, extrusion, briquetting, as well as post-agglomeration high-temperature processing.
Źródło:: Journal of Ecological Engineering; 2021, 22, 9; 263-271
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Particle agglomeration in flow modelled with molecular dynamics coupled to a thermal Lattice Boltzmann code
Autorzy:: Jiménez, J. F. C.
Powiązania:: https://bibliotekanauki.pl/articles/1955294.pdf
Data publikacji:: 2013
Wydawca:: Politechnika Gdańska
Tematy:: particle agglomeration
agglomerate structure
lattice Boltzmann method
Langevin kinetics
Opis:: Particle agglomeration can arise naturally (e.g. dust, salt) or as a result of industrial activities and/or combustion processes (e.g. spray drying, particle flame synthesis). The process itself and its mechanisms are important for many applications since the physical properties of the final structures are mainly determined by the composition, number, diameter and geometric arrangement of their constituent primary particles. Thus, knowing and controlling the extent of agglomeration meets a growing interest in environmental and industrial concerns. The objective of the paper is to develop a simulation model of particles suspended in a flowing fluid using MD simulations coupled to a Lattice Boltzmann (LB) solver. These simulations allowed determining the agglomerate transport and deposition rates depending on the flow conditions and agglomerate structure and understanding the relationship between agglomerate characteristics (i.e. growth kinetics and morphology) and their behavior in a flow field. Two systems of 2000 and 1000 particles were simulated at 300 K and 600 K both of them in a known fluid. Simulations using a Langevin thermostat were also performed to compare with the LB thermostat. This allowed quantifying the influence of the fluid flow on the agglomeration process and agglomerate properties. In further applications, this will help to a priori tailor the flow conditions to achieve a desired aggregate morphology. As a result, reasonable aggregate morphologies were achieved. One of the main conclusions is that taking into account the fluid flow (LB solver) the agglomeration process of the particles is notably accelerated in comparison to the Langevin simulations. One of the main implications of this work could be the possibility of using a known fluid to accelerate an aglomeration process given a suitable fluid and to find a desirable configuration of agglomerates. Another conclusion is that the agglomeration process is sensitive to the temperature variation and that the number of particles in the system influences the final configuration of agglomerates in LB simulations.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2013, 17, 3-4; 181--213
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Dispersion of colloidal agglomerate in mesoscale modelled by a hybrid fluid particle model elastic properties of the rectangular crystalline phase of planar hard cyclic pentamers
Autorzy:: Dzwinel, W.
Yuen, D. A.
Powiązania:: https://bibliotekanauki.pl/articles/1965869.pdf
Data publikacji:: 2001
Wydawca:: Politechnika Gdańska
Tematy:: fluid particle model
mesoscopic flow
colloidal agglomerate
fragmentation
agglomeration
Opis:: The dispersion of the agglomerating fluid process involving colloids has been investigated at the mesoscale level by a discrete particle approach - the hybrid fluid particle model (FPM). Dynamical processes occurring in the granulation of colloidal agglomerate in solvents are severely influenced by coupling between the dispersed microstructures and the global flow. On the mesoscale this coupling is further exacerbated by thermal fluctuations, particle-particle interactions between colloidal beds and hydrodynamic interactions between colloidal beds and the solvent. Using the method of FPM, we have tackled the problem of dispersion of a colloidal slab being accelerated in a long box filled with a fluid. Our results show that the average size of the agglomerated fragments decrease with increasing shearing rate gamma, according to the power-law A*gamma k, where k is around 2. For larger values of gamma, the mean size of the agglomerate S_avg increases slowly with gamma from the collisions between the aggregates and the longitudinal stretching induced by the flow. The proportionality constant A increases exponentially with the scaling factor of the attractive forces acting between the colloidal particles. The value of A shows a rather weak dependence on the solvent viscosity. However, A increases proportionally with the scaling factor of the colloid-solvent dissipative interactions. These results may be applied to enhance our understanding concerning the nonlinear complex interaction occurring in mesoscopic flows such as blood flow in small vessels.
Źródło:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2001, 5, 3; 355-371
1428-6394
Pojawia się w:: TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Wpływ aglomeracji w złożu fluidalnym na kształt cząstek wybranych proszków spożywczych
The influence of agglomeration in fluidized bed on particles shape of choosen food powders
Autorzy:: Janowicz, M.
Domian, E.
Kowalska, H.
Lenart, A.
Powiązania:: https://bibliotekanauki.pl/articles/289313.pdf
Data publikacji:: 2006
Wydawca:: Polskie Towarzystwo Inżynierii Rolniczej
Tematy:: aglomeracja
proszek spożywczy
kształt
wielkość
cząstka
agglomeration
food powder
shape
size
particle
Opis:: Celem pracy było zbadanie wpływu aglomeracji nawilżeniowej wieloskładnikowych mieszanin spożywczych na kształt cząstek otrzymywanych aglomeratów. Zakres badań obejmował analizę wpływu metody aglomeracji nawilżeniowej na średnie wartości współczynników związanych z kształtem cząstek: powierzchni projekcyjnej, obwodu projekcji, średnicy projekcyjnej, objętości, współczynnika wydłużenia oraz współczynnika kształtu. Aglomeracja nawilżeniowa wpływa na średnie wielkości badanych współczynników mieszanin proszków spożywczych. Zakres wpływu uzależniony jest od metody aglomeracji oraz składu surowcowego badanych mieszanin. Mechanicznie tworzenie aglomeratów sprzyja powstawaniu większych cząstek o regularnym kształcie.
The aim of work was examining the influence of agglomeration of multiple food mixtures on shape of agglometated particles. The range of investigations hugged the analysis of influence of type of mixing during wett agglomeration on average values of coefficients connected with shape of particles: projection surface, projection perimeter, projection dimeter, volume of particles, elongation coefficient and circularity coefficient. The wett agglomeration influences on average volues of investigated coefficients. The range of influence is dependent on method of agglomeration as well as composition of the raw material. Creating agglomerates mechanically favours formation larger particles with more regular shape.
Źródło:: Inżynieria Rolnicza; 2006, R. 10, nr 3(78), 3(78); 45-54
1429-7264
Pojawia się w:: Inżynieria Rolnicza
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelowanie rozkładu wielkości cząstek w procesie perykinetycznej koagulacji
Modeling of particle size distribution in pure perikinetic coagulation process
Autorzy:: Dyląg, M.
Kamieński, J.
Rosiński, J.
Powiązania:: https://bibliotekanauki.pl/articles/2070879.pdf
Data publikacji:: 2010
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: flokulacja
aglomeracja
destrukcja cząstek
erozja
układy zdyspergowane
flocculation
agglomeration
particle destruction
erosion
dispersed systems
Opis:: W pracy przedstawiono rozważania i wyniki teoretyczno-eksperymentalnej walidacji modelu opartego o bilans populacji, wyznaczanie rozkładów wielkości cząstek w procesie flokulacji. Uzyskane wyniki potwierdziły przydatność modelu do analizy wzajemnych interakcji mechanizmów aglomeracji, pękania i erozji oraz jego zgodność z rozważaniami teoretycznymi.
The paper presents considerations and results of theoretical and experimental validation of a model based on the population balance, and the determination of particle size distributions in flocculation process. The obtained results confirmed the model usefulness to study interactions of agglomeration, cracking and erosion mechanisms, and proved its conformity with theoretical considerations.
Źródło:: Inżynieria i Aparatura Chemiczna; 2010, 2; 35-36
0368-0827
Pojawia się w:: Inżynieria i Aparatura Chemiczna
Dostawca treści:: Biblioteka Nauki

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