ǂA ǂnovel rotation generator of hydrodynamic cavitation for the fibeillation of long conifer fibers in paper production

Janez Kosel (Author), Andrej Šinkovec (Author), Matevž Dular (Author)

Abstract

Refining of cellulose pulp is a critical step in obtaining high quality paper characteristics, however, this process is slow and costly especially for refining longer conifer fibers which are the preferred source for high quality paper production and give the paper its strength. In this study, we have applied a novel rotation generator of hydrodynamic cavitation for refining conifer rich pulp samples. Our results show that the device is capable of generating intense shear forces and multiple zones of developed cavitation and is successful in increasing the drainage rate of high consistency pulp (3%). The paper produced by means of the obtained pulp has higher quality because of its higher tensile index (50.5 kN m kg-1) and burst index (3 kPa m2 g-1). These physical parameters were sufficient for newsprint paper and other paper/board quality manufacture. In addition, this laboratory scale rotation generator proved to be economically efficient in comparison to the routinely employed laboratory beaters. To our knowledge, this is the first example of using hydrodynamic cavitation for the refinement of softwood fiber pulp of standard industrial consistencies (3%).

Keywords

rotational cavitation generator;hydrodynamic cavitation;drainability rate;tensile index;burst index;papermaking fibres;

Data

Language:	English
Year of publishing:	2019
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	532.528:676.026(045)
COBISS:	514097195
ISSN:	1350-4177
Views:	229
Downloads:	100
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	rotacijski generator;hidrodinamska kavitacija;stopnja drenaže;natezni indeks;razpočni indeks;vlakna;papirna inustrija;
Type (COBISS):	Journal
Pages:	str. 1-9
Issue:	ǂVol. ǂ59
Chronology:	Dec. 2019
DOI:	10.1016/j.ultsonch.2019.104721
ID:	12792651