2018 Issue 2


Inż. Ap. Chem. (Chemical Engineering and Equipment) 2018, 57, issue 2

Table of Contents


→Full texts will be available
on our Polish pages






Scientific papers:


CELAREK: Modern protection of pressure equipment against uncontrolled pressure increase
Inż. Ap. Chem., 2018, 57, 2, 25-28
The presented review of modern protection can be applied in the designing of operation and safe use of pressure equipment. Shallow plates and safety heads protecting the pressure equipment against sudden, variable or uncontrolled pressure increase are presented. They are an alternative to commonly used safety valves. A combination of safety plate with safety valve represents the optimal solution guaranteeing complete tightness of the system. This is important for environmental protection in case of toxic media.
Keywords: tiles, heads, safety valves, pressure equipment




K. JANUSZKIEWICZ, A. MROZEK-NIEĆKO, J. RÓŻAŃSKI: Influence of surfactants on the moisture absorption and removal by ZnIDHA fertilizer
Inż. Ap. Chem., 2018, 57, 2, 29-30
The paper presents an influence of three surfactants: polyglucoside, fatty alcohol ethoxylate and trisiloxane on the rate of absorption and moisture removal by ZnIDHA fertilizer (D, L-Aspartic acid, N-(1,2 dicarboxyethyl) disodium salt of Zn). The studies showed that trisiloxane and fatty alcohol ethoxylate extended for a few hours the time in which fertilizer in moist air is present in a solid form. None of surfactants used increased the time of water holding in fertilizer.
Keywords: solid fertilizer, ZnIDHA, moisture absorption, surfactant




M. NOWAK, K. KIJOWSKA, M. KABZIŃSKI, P. PTASZEK: Influence of hydrocolloid concentration on the mixing power and rheological parameters of guar gum aqueous solutions
Inż. Ap. Chem., 2018, 57, 2, 31-33
An influence of hydrocolloid concentration on rheological properties of model food fluids under long-term mixing is analyzed in the paper. Aqueous solutions of guar gum were used as model food fluids. The helical ribbon stirrer rotational speed was increased step by step. The mixing power and rheological parameters were calculated on a base of measured values of torque and rotational speed of the stirrer. The flow curves were used for the calculation of Ostwald-de Waele equation parameters. Moreover, the experimental data were described by power monomials and their coefficients were determined.
Keywords: mixing, guar gum, mixer-type rheometry




M. OCHOWIAK, A. KRUPIŃSKA, S. WŁODARCZAK, M. MATUSZAK, T. SZULC: Analysis of spatial distribution of the size of droplets generated by two-phase atomizers with swirl flow
Inż. Ap. Chem., 2018, 57, 2, 34-35
The paper presents results of experimental study aimed at the investigation of operating parameters effects on atomization process and swirl chamber geometrical dimensions on droplets size and droplets size distribution in aerosol stream. The effect of gas and liquid volumetric flow rate on the radial droplets size distribution, drop size histogram and Sauter mean diameter was determined. It was shown that the higher value of height to mixing chamber diameter ratio, the larger droplets are obtained in the spray axis.
Keywords: pressure-swirl atomizer, two-phase atomizer, mean droplet diameter, radial droplets size distribution




S. RÓŻAŃSKA, J. RÓŻAŃSKI, P. KOMOROWSKA: Measurement of extensional viscosity of cocamidopropyl betaine/sodium dodecylbenzenesulfonate mixtures using the capillary breakup of filament technique
Inż. Ap. Chem., 2018, 57, 2, 36-37
The paper presents the results of rheological measurements in the extensional flow for mixtures of cocamidopropylobetaine (CAPB) and sodium dodecylbenzenesulfonate (SDBS) solutions using the capillary breakup of filament technique. It was shown that the Oldroyd-B model of viscoelastic liquids can be used to describe the elasto-capillary thinning behaviour of CAPB/SDBS solutions. It was found that the ratio of extensional relaxation time to the limi-ting relaxation time for CAPB/SDBS solutions is much smaller than that for the solutions of cationic surfactants.
Keywords: extensional viscosity, capillary breakup of filament, CaBer