Wyniki wyszukiwania - BazTech

1

The effect of solids on interfacial rheology and the performance of coalescence filters

Krasiński Andrzej, Sołtan Łukasz, Kozyrski Jakub

Chemical and Process Engineering

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2021

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Vol. 42, nr 4

337-–348

EN

The paper presents a research work on the process of emulsion separation by filtration-coalescence method in the presence of solid particles. A polyester PBT coalescence medium was used in experiments of water removal from diesel fuel. Apart from parameters representing the geometry and inherent properties of coalescence filters, the additional emulsion constituents such as surfactants and solid particles also affect the process. These constituent can cover fibres and they can also influence emulsion properties. It has been experimentally confirmed that contrary to surface active compounds, which stabilise the emulsion, the presence of specific solid particles decreased the system stability. If surface active compounds are present in the system, the influence of solid particles is different at the same concentration level depending on their type. The destabilization of emulsion due to the presence of Arizona dust was more pronounced. Although the presence of particles mitigated the effect of surfactants, their deposition in the filter media oppositely affected the coalescence process depending on solid type. Oleophilic iron oxide particles improved the separation efficiency of water from diesel fuel, while Arizona test dust had a negative impact on the separation process performance.

2

Rozdział emulsji woda-olej napędowy przy użyciu mikrofiltrów

Dziak J., Gadowska I.

Inżynieria i Aparatura Chemiczna

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2016

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Nr 6

228--229

PL

Przedstawiono wyniki badań doświadczalnych rozdziału emulsji woda-olej napędowy. Do rozdziału emulsji wykorzystano mikro-filtry o średnicy por 30 pm: polipropylenowy (PP 30) oraz poliamidowy (NN30). W przypadku filtra poliamidowego dominował mechanizm wychwytywania kropel wody przez włókna filtra. W filtrze polipropylenowym funkcjonował mechanizm zderzania kropel wody między sobą oraz o włókna filtra, w wyniku czego powstawały większe krople, łatwiejsze do oddzielenia od fazy ciągłej. Różny mechanizm rozdziału emulsji wpływał na czas trwania procesu oraz na spadki ciśnienia podczas przepływu emulsji przez mikrofiltr.

EN

Results of experimental investigation on water-diesel fuel emulsion separation are presented in the paper. Microfilters of 30 pm pore diameter made of polypropylene (PP 30) and polyamide (NN30) were applied in emulsion separation. Different mechanisms of separation in filters made of different materials were observed. In case of polyamide filter dominates the mechanism of water droplet capture by filter fibers. In case of polypropylene filter the coalescence of droplets is mainly caused by impact of droplet into another droplet or a fiber. It leads to the formation of bigger droplet that can be easily separated from the continuous phase. A different mechanism of emulsion separation influences the separation time and determines the pressure drop in liquid during its flow through the niter.

3

Badania usuwania zanieczyszczeń olejowych z wody po procesie szczelinowania

Krasiński A., Wierzba P.

Inżynieria i Aparatura Chemiczna

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2016

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Nr 2

58--59

PL

Przeprowadzono badania usuwania oleju z wody. Zweryfikowano działanie dwóch komercyjnie oferowanych deemulgatorów, zmieniając ich stężenie oraz czas. W instalacji pilotażowej pracę separatora koalescencyjnego wspomagano dodatkiem wybranego deemulgatora w dawce określonej w badaniach laboratoryjnych. Uzyskano redukcję stężenia zemulgowanego oleju poniżej 10 mg/dm3, pozwalającego na bezproblemową pracę modułów membranowych w zasadniczej części instalacji oczyszczania wody po szczelinowaniu.

EN

In this work the oil removal from water was studied. The effect of concentration and time was investigated for two commercial deemulsifiers. Then, selected product was used to improve the separation performance of coalescence separator in the pilot-scale rig. The oil concentration below 10 mg/dm3 was obtained, which enables a reliable long-time operation of membranes located downstream the coalescer in the cleaning system of water used for hydraulic fracturing.

4

Aspekty techniczno-technologiczne rozdziału emulsji

Filipczak G., Mydlarz-Gabryk K.

Zeszyty Naukowe. Mechanika / Politechnika Opolska

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2008

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Vol. 324, z. 90

95-110

PL

W artykule, na podstawie dokonanego przeglądu literatury, podjęto próbę określenia przydatności i skuteczności metod mechanicznych rozdziału ciekłych mieszanin niejednorodnych. Wskazano na ich efekty, zalety jak i wady. Scharakteryzowano szkodliwość odpadu niebezpiecznego - emulsji ściekowych, a także zagrożenia dla środowiska, spowodowane występowaniem tego rodzaju emulsji. Przedstawiono problem rozdziału emulsji powstających w różnych dziedzinach przemysłu.

EN

The article, basing on the research literature is an attempt to designate the usefulness and efficiency of mechanical methods in order to separate liquid heterogeneous mixtures, namely sedimentation, rotation, effluence, filtration and flotation. Their effects, qualities as well as defects were indicated. The harmfulness of dangerous waste-sewage emulsion was characterized and furthermore its threat to environment caused by abundance of this kind of emulsions was specified. It was shown that there is a problem of emulsion separation generated in different branches of industry. Moreover, it was stated that the separation effect of liquid heterogeneous mixture by means of a specific mechanical method is among all dependant on emulsion creation conditions as well as emulsion properties. It was indicated that emulsion destruction depends on the extermination of factors consolidating it.

5

The adsorption effectiveness during emulsion separation on a carbon-lime bed

Sobczak E., Gozdecka G.

Ekologia i Technika

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2006

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R. 14, nr 2

77-81

EN

A study of the effectiveness of oil sewage purification by filtration on a carbon-lime bed was carried out. The volume ratio of carbon ash to waste lime equalled Vc/VCa = 0.375; 0.5; 0.625 of a regenerated carbon-lime bed. The ether extract, COD and inorganic contaminations with components of the bed, such as Ca+2, Cl-, were determined. The effectiveness of sewage purification increased as the quantity of sewage treated was increased. Sewage purification by adsorption on the carbon-lime bed does not solve the problem of environment protection as pollution get transported from liquid to solid state, and oily slag heaps of the used absorbent are produced. This in consequence causes the environment pollution as well. Relating to this, there is a need to regenerate oily absorbents and reuse them in adsorption process. The effectiveness of sewage purification on a regenerated bed and permeability of the bed after regeneration are similar to those for a freshly-prepared bed.