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A study on the improvement of uniformity of dust extraction from multicyclone dust collectors

Dziubak T.

Silniki Spalinowe

2011

R. 50, nr 4

69-78

The paper presents a possible improvement of uniformity of dust extraction from individual cyclones of a multi-cyclone air filter with modifications of the dust collector design. The suggested dust collector model is divided into segments, with insulated extraction ducts, assigned to a specific number of individual cyclones. The concept of the division into extraction ducts and segments is presented based on the air filter multi-cyclone of a special tracked vehicle. A physical and mathematical model of the dust collector segment is presented, and the heights of individual extraction ducts are calculated.

W artykule przedstawiono możliwość poprawy równomierności odsysania pyłu z pojedynczych cyklonów multicyklonowego filtra powietrza, polegającą na zmianie formy konstrukcyjnej osadnika pyłu. Zaproponowano model osadnika pyłu podzielonego na segmenty mające odizolowane od siebie kanały odsysania, którym przyporządkowano określoną liczbę cyklonów. Ideę podziału na segmenty i kanały odsysania przedstawiono na przykładzie multicyklonu filtra powietrza gąsienicowego pojazdu specjalnego, Przedstawiono model fizyczny i matematyczny konstrukcji segmentu osadnika pyłu. Wykonano obliczenia wysokości kanałów odsysania.

Extraction rate of nickel in aqueous ammonium sulfate solution with 5-dodecylsalicylaldoxime in kerosene

Sana T., Fujii R., Shiomori K., Kawano Y., Nagayoshi K.

Ars Separatoria Acta

2002

No. 1

35-44

In order to clarify the adsorption equilibrium for the species of the extractant and the extraction complex, the interfacial tensions between the aqueous and the organic solutions were investigated, using equilibrated kerosene solution in the presence of 5-dodecylsalicylaldoxime (LIX® 860-IC) and aqueous solution in the presence and absence of nickel ion. The interfacial tensions decreased with increasing in the concentration of LIX® 860-IC. Experimental results of the interfacial tension were analyzed by Gibb’s adsorption isotherm. The adsorption equilibrium constant and the interfacial area for the extractant and the extraction complex were determined. The extraction rate of nickel from the aqueous ammonium sulfate solution with LIX® 860-IC in kerosene was investigated using a Lewis-type transfer cell. The concentration effects of extractant, nickel, and hydrogen ion on the extraction rate were examined. The extraction rate increased with increasing in the concentrations of nickel and the extractant, and approached to constant values depending on the extractant concentration at a high concentration of nickel. The rate increased with decreasing in the concentration of hydrogen ion, and approached to constant values depending on the extractant concentration. These results were analysed based on an interfacial reaction model in which the reaction proceeds between an extractant species adsorbed at the interface and nickel ion in the aqueous solution. The extraction rate is interpreted based on the rate equation in which the interfacial reaction between a 1:1 nickel chelate complex species adsorbed at the interface and the extractant in the organic solution is the rate-determining step. The reaction rate constants and equilibrium constants were determined.