Gas-dynamic resistance in the swirling zone of the vortex apparatus gas flow

Kazan National Research Technological University, 68, Karla Marksa St., Kazan, 420015, Russia

^* Corresponding author: lejnya@yandex.ru

Abstract

At the end of the twentieth and beginning of the twenty-first century, almost all national policies in the world are oriented towards environmental problems. Therefore, environmental policy is aimed at reducing the consumption of various resources and reducing harmful emissions into the environment. This is especially true for dusts, which can be formed at almost all enterprises. One of the ways to improve environmental safety from gaseous, solid and liquid emissions from the production of various types and types of products in chemistry, petrochemistry and refining is modernization. Such modernization can be implemented in production management systems and resource consumption policies, as well as in modernization of technical processes and improvement of equipment design. In many chemical processes, dust-like particulate matter from gaseous emissions is captured by dust collection equipment, particularly cyclones and centrifuges. Such devices are usually installed in the “tail end” of the process circuit. However, despite the high effectiveness of these devices, their effectiveness decreases significantly as the size of solid particles in dust decreases, for instance, below 85-90% for cyclones of CN-15 type at particle size less than 10-15 microns. At the department “Machines and apparatuses of chemical productions” of Kazan National Research Technological University (KNRTU) a vortex apparatus has been developed, which retains high effectiveness at the size of solid particles in dust about 2.0-5.0 microns. In this paper, the gas dynamic resistance in the swirling region of the gas flow of the vortex device was investigated by changing the mode and velocity of the gas flow. Experimental research results of the resistance of the swirled flow of the vortex device for different modes and gas flow velocities are presented. The dependence and influence of the twist coefficient of the gas-air mixture (gas) flow on the resistance coefficient of the vortex device is revealed. Recommendations on application of research results for engineering calculations of similar apparatuses are given.