The impact of electrodialysis module design on its hydraulic characteristics

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F28676092%3A_____%2F16%3AN0000073" target="_blank" >RIV/28676092:_____/16:N0000073 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

The impact of electrodialysis module design on its hydraulic characteristics

Popis výsledku v původním jazyce

Measure hydraulic char. of various pilot electrodialysis modules and thus to extend knowledge basis necessary to design new modules adapted for specific applications.Measured char. incl. pressure drop dependence on linear flow velocity, internal leakages determined while only one working circuit was circulated and external leakages at defined pressure.Modules differed e.g. by spacer material,type of turbulizing net,design of liquid distribution system in the chambers, nr. of working circuits or nr. of membrane pairs.It was shown that nr. of membrane pairs in the range of 25–60 in pilot electrodialysis module didn´t affect the pressure drop in module significantly. Similar pressure drops were obtained also in modules with spacers differing in material, turbulizing net type or design of liquid distribution system.Significant increase in pressure drop was observed in the case of module with tortuous spacers,as measured values was more than twice as that of the modules with flow sheet spacers.Higher pressure drops occurred also in the case of 3-circuit module with bipolar membranes, probably due to narrower channels in liquid distribution system or the application of bipolar membranes without reinforcing fabric.However,obtained results were a bit confusing,as higher differences between various module designs were expected.Regarding internal leakages,it was observed that this parameter is affected mainly by the design of liquid distribution channels in spacers, but also by the number of module membrane cells.Modules with dense mesh in spacer distribution channels and with less membr. cells had lower internal leakages than modules with narrow empty channels and with more membr. cells.Measurements of external leakages shown that modules with spacers made from polyethylene and with more membrane cells had higher external leakages that the others.Moreover,modules with polypropylene spacers had in most cases no external leakages no matter what was the pressure in the module.

Název v anglickém jazyce

The impact of electrodialysis module design on its hydraulic characteristics

Popis výsledku anglicky

Measure hydraulic char. of various pilot electrodialysis modules and thus to extend knowledge basis necessary to design new modules adapted for specific applications.Measured char. incl. pressure drop dependence on linear flow velocity, internal leakages determined while only one working circuit was circulated and external leakages at defined pressure.Modules differed e.g. by spacer material,type of turbulizing net,design of liquid distribution system in the chambers, nr. of working circuits or nr. of membrane pairs.It was shown that nr. of membrane pairs in the range of 25–60 in pilot electrodialysis module didn´t affect the pressure drop in module significantly. Similar pressure drops were obtained also in modules with spacers differing in material, turbulizing net type or design of liquid distribution system.Significant increase in pressure drop was observed in the case of module with tortuous spacers,as measured values was more than twice as that of the modules with flow sheet spacers.Higher pressure drops occurred also in the case of 3-circuit module with bipolar membranes, probably due to narrower channels in liquid distribution system or the application of bipolar membranes without reinforcing fabric.However,obtained results were a bit confusing,as higher differences between various module designs were expected.Regarding internal leakages,it was observed that this parameter is affected mainly by the design of liquid distribution channels in spacers, but also by the number of module membrane cells.Modules with dense mesh in spacer distribution channels and with less membr. cells had lower internal leakages than modules with narrow empty channels and with more membr. cells.Measurements of external leakages shown that modules with spacers made from polyethylene and with more membrane cells had higher external leakages that the others.Moreover,modules with polypropylene spacers had in most cases no external leakages no matter what was the pressure in the module.

Druh

D - Stať ve sborníku

CEP obor

JP - Průmyslové procesy a zpracování

OECD FORD obor

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Projekt

<a href="/cs/project/LO1418" target="_blank" >LO1418: Progresivní rozvoj Membránového inovačního centra</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2016

Kód důvěrnosti údajů

C - Předmět řešení projektu podléhá obchodnímu tajemství (§ 504 Občanského zákoníku), ale název projektu, cíle projektu a u ukončeného nebo zastaveného projektu zhodnocení výsledku řešení projektu (údaje P03, P04, P15, P19, P29, PN8) dodané do CEP, jsou upraveny tak, aby byly zveřejnitelné.

Název statě ve sborníku

Proceedings 43rd International Conference of Slovak Society of Chemical Engineering

ISBN

978-80-89597-35-2

ISSN

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e-ISSN

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Počet stran výsledku

8

Strana od-do

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Název nakladatele

Slovak Society of Chemical Engineering

Místo vydání

Bratislava

Místo konání akce

Tatranské Matliare

Datum konání akce

23. 5. 2016

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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