Temat: granular bed - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Hydrodynamic and kinetic study of an elution of a high viscosity liquid from the sand bed using eluent of low viscosity
Autorzy:: Sęk, J.
Błaszczyk, M.
Bartos, M.
Powiązania:: https://bibliotekanauki.pl/articles/185535.pdf
Data publikacji:: 2012
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: granulacja
wymywanie
przepuszczalność
kinetyka
porous beds
granular bed
elution
permeability
kinetics
Opis:: The study was aimed to determine the hydrodynamic of water seepage through a porous bed saturated with different amounts of high viscosity liquids. An attempt was made to describe the process of seepage through beds saturated with oils using the theory of outflow of a liquid from the tank. It was assumed that the discharge coefficient will represent changes of flow resistance during the process. It was found that the dependence of this factor on time is linear. In the second part of this work kinetics of the seepage process was investigated. Dependence of oil concentrations, eluted from the deposit with the flowing water, on time has been evaluated. Thanks to these studies it was possible to determine the effectiveness of an elution of high viscosity liquids from porous beds using water as the washing out liquid.
Źródło:: Chemical and Process Engineering; 2012, 33, 1; 31-41
0208-6425
2300-1925
Pojawia się w:: Chemical and Process Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Aparat hybrydowy ze złożem ziarnistym w instalacji spalania odpadów
Hybrid apparatus with granular bed in the Installation of waste combustion
Autorzy:: Hehlmann, J.
Pietrasik, E.
Kujawska, E.
Bania, D.
Powiązania:: https://bibliotekanauki.pl/articles/1825937.pdf
Data publikacji:: 2009
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: aparat hybrydowy
instalacja spalania odpadów
granular bed
hybrid apparatus
waste combustion
Opis:: Combustion of municipal and industrial waste is widely used method of utilization. However it is accompanied by a number of problems, mainly related to ensuring dequate calorific value and reducing emission of pollutants in the exhaust gas (dust, sulfur dioxide, carbon monoxide, nitrogen oxides, dioxins and PAHs).The designed waste incinerating plants equipped with complex systems of harmful compounds emission reduction, flue gas treatment and disposal of ashes accounts for 75% of the whole incinerating plant capital costs. The way to reduce costs can be a usage of the flue gas heat for drying specially preparated bed. This bed purifies flue gas from the dust and gas components and then undergoes co-combustion with waste, contributing to an increase of calorific value and stabilization of the combustion process. This paper presents potential use of the apparatus with sliding granular bed as a hybrid device for simultaneous removal of solid and gas pollutants from flue gas, as well as skin-drying of the bed. Finding this solution advisible, comprehensive process researches of the gas cleaning, drying and gas pressure drop across model granular beds have been carried out. The laboratory installation enabled measurement of gas cleaning effectiveness, rate of bed drying and gas pressure drop in its variables; flow velocity in the range of w0=<0.1...1>m/s, temperatures t=<90...190>deg. C dust concentration cp=<1...10>ź10-3 kg/m3 and also different parameters of the bed have been used. Based on the collected results, the criterion equations of gas cleaning process, drying and pressure drop for model granular beds have been developed. Research and analysis of the results showed that: 1) the drying of waste prior to their thermal disposal gives the possibility of increasing their calorific value for about 27÷30%, which translates directly into the calorific effect of the boiler, 2) the possibility to obtain the gas cleaning efficiency in the range of 60 to 99.9%. Such solution may be a first stage of dedusting or a final one, depending on the structure of bed, dust and gas properties and selected load of filtration surface as well as the sequences of apparatuses in the line of flue gas treatment from the municipal waste incinerating installation. Developed calculation methods are helpful in designing equipment for the beds drying and waste gases cleaning in the waste disposal process i.e.: in waste incinerating plants, in the plants of formed biofuel production, or when inert beds are used as high performance filter deduster especially in the case of high-temperature gases with recovery of the powdery product (eg. installation of Titanium White).
Źródło:: Rocznik Ochrona Środowiska; 2009, Tom 11; 281-297
1506-218X
Pojawia się w:: Rocznik Ochrona Środowiska
Dostawca treści:: Biblioteka Nauki

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