Abstract
As a result of consideration of the phenomena occurring in the vortex tubes, it has been established that there are two forms of swirling dust-gas flow. The circumferential velocity profile in the zone of swirler and return flow is close to the quasi-solid type of rotation. In the peripheral zone, it is close to the quasi-potential type. It has been established by simulation that in the zone of quasi-solid rotation and subsequent transition to a quasi-solid flow, aggregation of particles takes place due to an intense collision of the dust particles drifting to the walls of the vortex tube. There is a 5 to 10 times increase in the determining particle size depending on the value of their specific surface area. In the zone of quasi-potential flow, the bulk of the solid dust particles is concentrated near the tube walls in a zone close to the boundary layer and the dust-free gas concentrates in a zone close to the axial flow. Taking into account the effect of uneven distribution of the braking temperature and consequently creation of a positive gradient of gas temperatures from the tube axis to the walls, thermodynamic and kinetic conditions arise for destruction of CO, NO x , SO x gas impurities (in the case of hot gas with a temperature above 673 K). Thus, when preparing a dusty gas stream from a process source before feeding it to the dust collector, the vortex tube creates conditions for complex purification of the gas stream from dust and gas impurities. Also, efficiency of dust removal in the main unit increases to 99.9 %. This will make it possible to lower the industrial negative impact on atmosphere and reduce threat of global consequences for future generations.
Highlights
**National Technical University «Kharkiv Polytechnic Institute» Kyrpychova str., 2, Kharkiv, Ukraine, 61002. As it is generally known, the main task at present of gas scrubbing is to bring content of toxic impurities in gas emissions to maximum permissible concentrations established by sanitary code
The variety of harmful impurities in industrial gas emissions and their physico-chemical properties brings about a large number of cleaning methods, devices and reactors used
The greatest success in the centrifugal capture of particulate dust from gas flows was observed in the field of hardware implementation rather than in scientific designs
Summary
As it is generally known, the main task at present of gas scrubbing is to bring content of toxic impurities in gas emissions to maximum permissible concentrations established by sanitary code. The variety of harmful impurities in industrial gas emissions and their physico-chemical properties brings about a large number of cleaning methods, devices and reactors used. The greatest success in the centrifugal capture of particulate dust from gas flows was observed in the field of hardware implementation rather than in scientific designs. This is due to the accumulation of a many years’ experience in operation of industrial devices on the one hand and a high complexity of the gas-solid system in the centrifugal field on the other hand. Study of flow conditions in the dry gas purification device, redistribution of energy under various conditions and influence of physical and chemical characteristics of the gas flow on these parameters is a relevant issue and will improve device efficiency
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Eastern-European Journal of Enterprise Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
