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Gravitation Auger Water Separator from a Suspension of Wet Bulk Material

Hrabovský Leopold, Durna Antonin, Fries Jiri, Režnar Jiří

Advances in Science and Technology. Research Journal

2020

Vol. 14, no 4

58--67

The paper deals with the problem of water separation from a mixture of wet loose material using a worm, or auger, dewaterer, whose working element is a full auger with variable thread pitch, rotating in a fixed trough. The extrusion of water from the wet material suspension, consisting of a mixture of mineral wool tufts and granules, is effected in the auger dewaterer by entraining and compressing the wet bulk material through the threads, the varied pitch of the conical screw, and the rotation of the auger.The thread faces and thread edges of an improperly designed screw of the auger dewaterer by Advanced Metal Powders s.r.o. showed notable wear from the applied pressure of the packed wet bulk material (passing through the threads of the different pitch of the conical auger). Finding the cause of the severe abrasion and preventing excessive further wear of the auger was the subject of theoretical calculations and experimental verification tests, whose main conclusions are presented in this paper. The paper gives the relations that allow calculation of the volume of bulk material in individual sections of the auger dewaterer. The calculated values from these relationships, were verified and compared with the values read from the 3D CAD system for designing SolidWorks Premium 2012 SP 5.0 models.The percentage compression values of the loose material in the threads of differential pitch of the conical auger of the unsuitably designed auger-screw dewaterer by Advanced Metal Powders s.r.o. allowed us to define recommendations that, applied, would ensure malfunction-free operation of the auger-screw dewaterer.

Ocena efektywności grawitacyjnego odwadniania osadów organicznych na zagęszczaczach taśmowych

Maliga G., Składzień J., Szymków J.

Inżynieria i Aparatura Chemiczna

2009

Nr 4

77-78

Zaprezentowano wyniki eksperymentów, przeprowadzonych na urządzeniu testowym w skałi laboratoryjnej, polegających na grawitacyjnym zagęszczaniu komunalnych ścieków pofermentacyjnych zmieszanych z różnymi dawkami flokulanta syntetycznego w postaci polielek-trolitu kationowego. Wyznaczono krzywe odwadniania dła każdej dawki dozowanego polimeru. Wykazano, że na podstawie analizy otrzymanych krzywych można dokonać wyboru optymałnej ilości dozowanego polielektrolitu.

Results of experimental tests on gravity dewatering of municipal sewage sludges were presented in the paper. Experiments on gravity dewatering of sewage studges conditioned with different quantity of fiocculation agent, i.e. cationic polyelectrolyte, were carried out in a laboratory stand. As a result of these investigations a series of dewatering curves were obtained. It was confirmed that on the basis of dewatering curves the optimum dosage of polyelectrolyte could be suggested.