The Power Consumption Performance of an Orbiting Screw Solid-Solid Mixer

Abstract

In this work we have investigated mixing in a modified orbiting screw mixer (MOSM) designed for solid-solid mixing. Mixing was carried out using urea powder and natural zeolite powder (UZ) of three varying particle sizes (50-60, 60-80 and 80 mesh). Power consumption was calculated from the measured torque of orbit and screw, obtained from computerized records. It was found that the mixing process in the modified orbiting screw mixer with air injection required a lower power consumption for each particle-size group when compared to mixing without air injection. With UZ mixing in MOSM with air injection, the lowest E was obtained for the 60-80 mesh particle-size group (4,297 Joule/kg-1), whereas when mixing without air injection, the value was 10,296 J/kg. The best mixing operation in this experiment was achieved at N Fr = 1.18x10-3 and in the range of values N Re ≈ 8.77x10 7 to 2.63x10 8. Moreover, in this study, we have developed an equation to estimate the power consumption required for mixing and determined its correlation with dimensionless numbers.

Demulsifier Performance in Diluted Bitumen Dewatering: Effects of Mixing and Demulsifier Dosage

“…Laplante et al and Chong et al both showed that reducing the injection concentration (% of active ingredient in the demulsifier solution) improves demulsifier performance and that mixing depends on both the rate of energy dissipation and the mixing time. These two variables can be combined to give a single scaling variable, the mixing energy ( J = ε× t mix ). − The mixing energy ( J ) can be estimated and/or directly measured for various vessels, mixers, pipes, and pumps . It allows a translation of mixing conditions from batch (mixing time × energy dissipation rate) to continuous (residence time × energy dissipation rate) processes.…”

Експериментальна Автоматизована Установка Гвинтового Конвеєра З Обертовим Кожухом Для Змішування Сипких Матеріалів

“…Для визначення впливу модифікації гвинтових конвеєрів на траєкторію переміщення частинок окремих компонентів використано метод дискретних елементів [10][11][12], математичне моделювання [13][14][15] та експериментальні дослідження [16][17].…”