Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "fluidized-bed" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 101
Tytuł:
The influence of process parameters on combustion of plastic waste in the fluidized bed reactor
Autorzy:
Jankowski, D.
Żukowski, W.
Powiązania:
https://bibliotekanauki.pl/articles/778547.pdf
Data publikacji:
2013
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
plastics
fluidization
combustion
thermal decomposition
polymers
fluidized bed reactor
municipal waste
waste utilization
fluidized bed
Opis:
The paper presents the results of a research on the effects of process parameters on the combustion of waste plastics. The experiments were carried out in a laboratory fluidized bed reactor. The temperature and the conditions of the process were changed during the experiments. The plastics were combusted continuously (autothermally), periodically with extra fuel (co-firing) and alone in a hot fluidized bed. During the combustion process of materials containing nitrogen (PA, ABS), while the bed temperature decrease, changes of emissions of nitrogen oxides, in particular an increase in the concentration of N2O, up to 250 ppm at ~730°C, were observed. During ABS combustion, emission of HCN was registered, at a maximum of 400 ppm. The presence of the supporting fuel (LPG) resulted in the stabilization and acceleration of the plastic samples degradation process. The rate of thermal decomposition of waste materials depended on its elemental composition and also the physicochemical properties.
Źródło:
Polish Journal of Chemical Technology; 2013, 15, 4; 75-79
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical optimization of air flow in the plenum chamber of an industrial CFB boiler
Autorzy:
Mirek, P.
Jabłoński, J.
Nowak, W.
Powiązania:
https://bibliotekanauki.pl/articles/1943239.pdf
Data publikacji:
2008
Wydawca:
Politechnika Gdańska
Tematy:
windbox
air distributor
circulating fluidized bed
Opis:
The article presents the results of experimental and numerical studies on windboxes operating in a 235MWe Circulating Fluidized Bed (CFB) boiler. The main problems of windbox designs have been identified and a modified internal geometry has been proposed which causes a more uniform flow under the grid and prevents the velocity field from formation of dead zones.
Źródło:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk; 2008, 12, 3-4; 237-244
1428-6394
Pojawia się w:
TASK Quarterly. Scientific Bulletin of Academic Computer Centre in Gdansk
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Scaling of flow phenomena in circulating fluidized bed boilers
Autorzy:
Mirek, P.
Powiązania:
https://bibliotekanauki.pl/articles/185439.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrodynamika
fluidyzacja
scaling
fluidized bed
hydrodynamics
Opis:
The paper presents an overview of scaling models used for determining hydrodynamic parameters of Circulating Fluidized Bed boilers. The governing equations and the corresponding dimensionless numbers are derived and presented for three different approaches to the scaling law of fluidized beds: classical dimensional analysis, differential equations and integrated solutions and experimental correlations. Some results obtained with these equations are presented. Finally, the capabilities and limitations of scaling experiments are discussed.
Źródło:
Chemical and Process Engineering; 2011, 32, 2; 91-100
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Carbon Shale Combustion in the Fluidized Bed Reactor
Autorzy:
Olek, M.
Kandefer, S.
Kaniowski, W.
Żukowski, W.
Baron, J.
Powiązania:
https://bibliotekanauki.pl/articles/779262.pdf
Data publikacji:
2014
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
shale coal
combustion
fluidized bed technology
Opis:
The purpose of this article is to present the possibilities of coal shale combustion in furnaces with bubbling fluidized bed. Coal shale can be autothermally combusted in the fluidized bed, despite the low calorie value and high ash content of fuel. Established concentrations of CO (500 ppm) and VOC (30 mg/m3) have indicated a high conversion degree of combustible material during combustion process. Average concentrations of SO2 and NOx in the flue gas were higher than this received from the combustion of high quality hard coal, 600 ppm and 500 ppm, respectively. Optional reduction of SO2 and NOx emission may require the installation of flue gas desulphurization and de-NOx systems.
Źródło:
Polish Journal of Chemical Technology; 2014, 16, 2; 74-76
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modelling of fluidized bed biomass gasification in the quasi-equilibrium regime for preliminary performance studies of energy conversion plants
Autorzy:
Kalina, J.
Powiązania:
https://bibliotekanauki.pl/articles/185441.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biomasa
fluidyzacja
termodynamika
biomass
fluidized bed
thermodynamics
Opis:
Thermodynamic equilibrium-based models of gasification process are relatively simple and widely used to predict producer gas characteristics in performance studies of energy conversion plants. However, if an unconstrained calculation of equilibrium is performed, the estimations of product gas yield and heating value are too optimistic. Therefore, reasonable assumptions have to be made in order to correct the results. This paper proposes a model of the process that can be used in case of deficiency of information and unavailability of experimental data. The model is based on free energy minimization, material and energy balances of a single zone reactor. The constraint quasiequilibrium calculations are made using approximated amounts of non-equilibrium products, i.e. solid char, tar, CH4 and C2H4. The yields of these products are attributed to fuel characteristics and estimated using experimental results published in the literature. A genetic algorithm optimization technique is applied to find unknown parameters of the model that lead to the best match between modelled and experimental characteristics of the product gas. Finally, generic correlations are proposed and quality of modelling results is assessed in the aspect of its usefulness for performance studies of power generation plants.
Źródło:
Chemical and Process Engineering; 2011, 32, 2; 73-89
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Simulation of circulating fluidized bed gasification for characteristic study of pakistani coal
Autorzy:
Ramzan, N.
Athar, M.
Begum, S.
Ahmad, S. W.
Naveed, S.
Powiązania:
https://bibliotekanauki.pl/articles/779604.pdf
Data publikacji:
2015
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
ASPEN PLUS
circulating fluidized bed
coal
gasification
simulation
Opis:
A process model for turbulent pressurized circulating fluidized-bed coal gasifier is created using ASPEN PLUS software. Both hydrodynamic and reaction kinetics parameter are taken into account, whose expressions for fluidized bed are adopted from the literature. Various reactor models available in ASPEN PLUS with calculator as External Block are nested to solve hydrodynamics and kinetics. Multiple operational parameters for a pilot-plant circulating fluidized-bed coal gasifier are used to demonstrate the effects on coal gasification characteristics. This paper presents detailed information regarding the simulation model, including robust analysis of the effect of stoichiometric ratio, steam to coal ratio, gasification temperature and gasification agent temperature. It is observed that, with the increase in the flow rate of air, the components hydrogen, carbon monoxide, carbon dioxide and methane reduce, which causes the Lower Heating Value (LHV) of synthesis gas (Syn. Gas) to decrease by about 29.3%, while increment in the steam flow rate shows a minute increase in heating value of only 0.8%. Stoichiometric ratio has a direct relationship to carbon conversion efficiency and carbon dioxide production. Increasing the steam to coal ratio boosts the production of hydrogen and carbon monoxide, and causes a drop in both carbon dioxide concentration and the conversion efficiency of carbon. High gasifying agent temperature is desired because of high concentration of CO and H2 &ensp, increasing carbon conversion and LHV. A high gasifying agent temperature is the major factor that affects the coal gasification to enhance H2 &enspand CO production rapidly along with other gasification characteristics.
Źródło:
Polish Journal of Chemical Technology; 2015, 17, 1; 66-78
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling of a Primary Air Distribution in a Plenum Chamber of the 700 MWth Circulating Fluidized Bed Boiler
Autorzy:
Mirek, Paweł
Powiązania:
https://bibliotekanauki.pl/articles/2201878.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
windbox
circulating fluidized bed boiler
fluidization
primary air
Opis:
The windbox is a compressed air chamber installed directly beneath the fluidized bed boiler grid and is designed to evenly distribute air across the entire cross-section of the air distributor. Due to the large volume of the plenum chambers, it is very difficult to experimentally determine the flow conditions within them. Therefore, the analysis of airflow in these devices is usually performed using computational fluid dynamics tools. The article presents the results of modeling primary air distribution in the plenum chamber of the 700 MWth circulating fluidized bed boiler operating in PGE GiEK S.A. Turów Power Plant Division. Based on the results of calculations performed using the ANSYS Fluent software, the basic problems of the design windbox geometry were identified and a method for improving the uniformity of the gas flow under the grid was proposed. As can be seen from the results obtained, the design geometry of the windbox does not provide the required uniformity of air distribution under the grid.
Źródło:
Advances in Science and Technology. Research Journal; 2022, 16, 5; 86--99
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Instalacja procesu suszenia niskotemperaturowego w złożu fluidalnym
Installation of low temperature drying process in a fluidized bed
Autorzy:
Krempski-Smejda, M.
Stawczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/2071179.pdf
Data publikacji:
2010
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
suszenie niskotemperaturowe
złoże fluidalne
freeze-drying
fluidized bed
Opis:
W pracy przedstawiono budowę i schemat działania instalacji do suszenia fluidyzacyjnego niskotemperaturowego pod ciśnieniem atmosferycznym. Wykonane prace modernizacyjne komory suszarniczej umożliwiły prowadzenie procesu w złożu fluidalnym, w którym stan zamrożenia zmniejsza szybkość suszenia. Ponadto zaprezentowany został system zdalnego sterowania instalacją, której głównym atutem jest możliwość pomiaru masy bez konieczności wyjmowania próbki z komory suszarniczej.
The paper describes the principle of work and construction of freeze flu-idized-bed drying under atmospheric pressure. A modernization of drying chamber enabled one to conduct the process in a fluidized bed in which freeze state is responsible for drying rate reduction. The data acquisition and control system enabled the mass change measurement without taking out a sample from the drying chamber.
Źródło:
Inżynieria i Aparatura Chemiczna; 2010, 4; 44-45
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A sedimentation model for particulate suspensions in liquid–solid fluidized beds with inclined channels
Autorzy:
Li, Y.
Li, N.
Qi, X.
Zhang, W.
Zhu, R.
Powiązania:
https://bibliotekanauki.pl/articles/949735.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
suspension
fluidized bed
fluidization
inclined channel
inclined sedimentation
Opis:
The motion characteristics of mineral particles in a modified fluidized bed (mFB) with inclined plates have been studied both theoretically and experimentally. A particulate sedimentation model is built on the fluidization superficial velocity, terminal settling velocity, the device dimensions, the particle properties, and the volume fraction of the particulate suspensions in the inclined channel, which is to describe the motion behavior of particles in mono-disperse suspensions. The experimental particles are a mixture of silica and sand particles with the sizes in the range of 425 - 710 μm and 710 - 880 μm, respectively. Further, the model is extended to describe bi-disperse suspensions. The experimental system is established to be consistent with the theoretical arrangements, aiming to provide more accurate measurements. Specifically, the prediction results are in good agreement with the experimental data with the absolute deviation less than 11%. The results showed that the average solid volume fraction in the inclined channel fluctuates slightly for a given total solid inventory. The theoretical model is of certain practical significance for applications of this system to the classification, separation, and desliming of minerals.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 3; 837-846
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ehksperimentalnye i teoreticheskie issledovanija gidrodinamiki kipjashhego sloja drevesnogo topliva
Experimental and theoretical researches of hydrodynamics of the fluidized bed of wood waste
Autorzy:
Red'ko, A.
Pivnenko, J.
Powiązania:
https://bibliotekanauki.pl/articles/78160.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
fluidized bed
wood waste
hydrodynamics
experimental research
theoretical research
Źródło:
Motrol. Motoryzacja i Energetyka Rolnictwa; 2015, 17, 6
1730-8658
Pojawia się w:
Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Oxidative decomposition of methanol in a vibroacoustic fluidized bed of Ag-coated cenosphere core-shell catalyst
Autorzy:
Berkowicz, G.
Żukowski, W.
Baron, J.
Powiązania:
https://bibliotekanauki.pl/articles/778910.pdf
Data publikacji:
2016
Wydawca:
Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:
fluidized bed
catalytic oxidation of methanol
silver coated cenospheres
Opis:
The paper presents results of a study of oxidative decomposition of methanol in a fluidized bed of silver catalyst. The process of methanol oxidation was carried out on Ag-coated cenospheres core-shell catalyst. The catalyst was obtained by precipitation of silver from methanolic solution of silver nitrate on cenospheres. Cenospheres are lightweight, inert, hollow spheres, which can be easily introduced into a fluidized bed. Application of the catalyst in a form of fluidized bed should ensure good temperature equalization which is very important at low temperatures due to the possibility of generation of formaldehyde. It turned out that local hot points occur in that kind of a catalyst (in the form of a fluidized bed but with very low density), thus use of additional acoustic wave is necessary to ensure good control over the temperature of the process. The products of the process of methanol oxidation were monitored on-line by Fourier transform infrared spectroscopy (FTIR). The catalyst has proven to be highly active in the oxidative decomposition of methanol. Full of methanol conversion in reaction of complete oxidation was achieved at 350°C.
Źródło:
Polish Journal of Chemical Technology; 2016, 18, 4; 71-75
1509-8117
1899-4741
Pojawia się w:
Polish Journal of Chemical Technology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe rozwiązanie odbioru zawiesiny z krystalizatora fluidalnego
Autorzy:
Wójcik, J.
Synowiec, P. M.
Powiązania:
https://bibliotekanauki.pl/articles/142595.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Przemysłu Chemicznego. Zakład Wydawniczy CHEMPRESS-SITPChem
Tematy:
krystalizator fluidalny
odbiór zawiesiny
CFD
fluidized-bed crystallizer
discharge
Opis:
New Solution of Crystal Dischrge from FL Crystallizer
Źródło:
Chemik; 2014, 68, 3; 194-197
0009-2886
Pojawia się w:
Chemik
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A simplified methodolgy for scaling hydrodynamic data from Lagisza 460 MWC supercritical CFB boiler
Autorzy:
Mirek, P.
Powiązania:
https://bibliotekanauki.pl/articles/185646.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
hydrodynamika
skalowanie
złoże fluidalne
hydrodynamics
circulating fluidized bed
scaling
Opis:
The paper presents the results of model studies on the hydrodynamics of the world's first supercritical circulating fluidized bed boiler Lagisza 460 MWe, carried out on a scale model built in a scale of 1/20 while preserving the full geometrical similarity. To reflect the macroscopic pattern of flow in the boiler's combustion chamber, tests were carried out based on two dimensionless flow dynamic similarity criteria, while maintaining a constant Froude number value between the commercial and the scaled-down units. A mix of polydispersion solids with its fractional composition determined by scaling down the particle size distribution of the boiler's inert material was utilised for the tests using a special scaling function. The obtained results show very good agreement with the results of measurements taken on the Lagisza 460 MWe supercritical CFB boiler.
Źródło:
Chemical and Process Engineering; 2011, 32, 4; 245-253
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphology and elemental composition of product obtained from struvite fluidized bed reactor
Morfologia i skład chemiczny produktu odzysku fosforu w reaktorze z ruchomym złożem
Autorzy:
Bydałek, F.
Kula, A.
Mąkinia, J.
Powiązania:
https://bibliotekanauki.pl/articles/396097.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Zielonogórski. Oficyna Wydawnicza
Tematy:
phosphorus recovery
struvite
fluidized bed
odzysk fosforu
struwit
złoże ruchome
Opis:
Phosphorus scarcity is no longer a distant future, therefore the idea of phosphoru recovery is currently widely adopted and developed. Technologies based on the struvite precipitation are consider to address the future P challenges in the optimum way. This paper presents the results of the pilot scale implementation of fluidized bed reactor for struvite precipitation at the wastewater treatment plant. The test was carried out to assess the applicability of the technology in terms of robustness and final product quality, operating at low pH level (7,5-7,8). Obtained struvite pellets were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) with an energy dispersive spectrometer (EDS). The presence of foreign ions and particulate impurities in the feed source, affected the uniform growth of the crystal structure, resulting in highly porous structure of the pellets. Despite the varying physiochemical conditions, typical for wastewater, obtained pellets were determined with 95% struvite purity.
Kurczące się zasoby fosforu kopalnego jak i ich niekorzystny rozdział geopolityczny, powodują iż koncepcja odzysku fosforu z różnego rodzaju odpadów staje się rozwiązaniem niezbędnym dla zapewnienia dalszego, sprawnego funkcjonowania ludzkości. Na przestrzeni ostatnich dwóch dekad, opracowany został cały szereg technologii, dostosowanych do pracy w układach oczyszczania ścieków. Biorąc pod uwagę możliwości wdrożeniowe jak i właściwości agronomiczne uzyskanego produktu w danym procesie odzysku fosforu, technologie oparte o proces wytrącania fosforu w postaci fosforanu magnezowo-amonowego/struwitu (MgNH4PO4 •6H2O), uznane są powszechnie za jedno z najlepszych rozwiązań. W artykule scharakteryzowano granulat uzyskany w reaktorze o złożu ruchomym zasilanym odciekami z komory fermentacji. Reaktor wykonany był w technologii Ostara PEARL. Ciecz procesową utrzymywano w przedziale pH 7,5-7,8, tym samym ograniczając ilość dozowanych chemikaliów. Jako źródło magnezu wspomagające proces krystalizacji struwitu wykorzystano chlorek magnezu. Pomiary składu chemicznego i morfologii uzyskanego materiału wykonano przy użyciu technik dyfrakcji rentgenowskiej (XRD) oraz spektroskopii dyspersji energii promieniowania rentgenowskiego (SEM-EDS). Uzyskane wyniki wykazują wysoką (95%) zawartość struwitu w granulacie oraz śladowe ilości zanieczyszczeń organicznych wbudowanych w strukturę przestrzenną materiału. Obecność jonów Ca oraz kwasów humusowych, zaburzyła równomierny rozrost sieci krystalicznej, powodując wysoką porowatość materiału. Badanie potwierdziło potencjał wdrożeniowy technologii produkcji struwitu, w szczególności w odniesieniu do odporności procesu na występujące wahania składu chemicznego cieczy procesowej.
Źródło:
Civil and Environmental Engineering Reports; 2018, No. 28(2); 139-149
2080-5187
2450-8594
Pojawia się w:
Civil and Environmental Engineering Reports
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of calcination temperature on activation behaviors of coal-series kaolin by fluidized bed calcination
Autorzy:
Yuan, S.
Han, Y.
Li, Y.
Gao, P.
Yu, J.
Powiązania:
https://bibliotekanauki.pl/articles/109800.pdf
Data publikacji:
2018
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
coal-series kaolin
fluidized bed calcination
calcination temperature
activation behaviors
Opis:
This paper is aimed at investigating activation behaviors for coal-series kaolin using fluidized bed calcination as a novel method. The properties of calcined products at different temperature by fluidized bed calcination were evaluated by determination of weight loss rate, whiteness, chemical oxygen demand (COD), aluminum dissolution degree. The thermal behaviors and reaction mechanism were characterized by thermo gravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), particle size distribution (PSD) and scanning electron microscopy (SEM). The results showed that calcination temperature was essential factor determining the properties and crystallinity of calcined products using fluidized bed calcination. Coal-series kaolin transformed into irregular and amorphous metakaolin with excellent properties as calcined at 600-900 °C, which attributed to the dehydroxylation of kaolinite and combustion of carbon/organic matter. Calcined kaolin eliminated activity ascribed to the recrystallization into mullite when calcination temperature was over 1000 °C. It was believed that fluidized bed calcination was an efficient thermal activation technology for coal-series kaolin and the calcination temperature should be controlled accurately.
Źródło:
Physicochemical Problems of Mineral Processing; 2018, 54, 2; 590-600
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 101

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies