ISSUE 22



Kyiv National University of Construction and Architecture (KNUCA)

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VENTYLIATSIIA, OSVITLENNIA TA TEPLOHAZOPOSTACHANNIA

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I. Redko, associate professor, O.M.Beketov National University of Urban Economy in Kharkiv, Kharkov, Ukraine, germes_s2006@ukr.net ORCID: 000-0000-0000-0000
A. Redko, ScD, professor, Kharkiv National University of Construction and Architecture, Kharkiv, Ukraine, andrey.ua-mail@ukr.net, ORCID: 0000-0003-2331-7273
О. Priymak, ScD, professor, Kiev National University of Construction and Architecture, Kyiv, Ukraine, 02opriymak@gmail.com
V. Kostiuk, Ph.D, NAU "Kharkiv Aviation Institute", Kharkiv, Ukraine, vlakos@ukr.net, ORCID: 0000-0003-0142-8060
E. Kirilash, PhD, assistant professor, NAU "Kharkiv Aviation Institute", Kharkov, Ukraine, kirilashelena@gmail.com, ORCID: 0000-0003-2949-3577
V. Norchak, Post-graduate student, Kharkiv National University of Civil Engineering and Architecture, Kharkiv, Ukraine, super.jeep2000@ukr.net


Numerical Simulation of Combustion Processes of Solid Fuel in a Furnace with Counter-Current Twisted Streams


Abstract. The purpose of the work is numerical research of the powdered peat processes in a cylindrical vortex furnace with counter current twisted flows. The results of computer simulation has been presented for burning processes of low-grade solid fuel (powdered peat) with humidity of 40 %, ash content of 6 % and higher specific heat of combustion Qh = 12.3 MJ/kg. The fields of temperature distribution and gases velocity and particles in volume and at the exit from the furnace are obtained. The particle motion trajectories with a diameter of 25 microns and 250 microns in volume of heating are obtained. It has been calculated that the concentration of oxygen is close to zero along the height of heating. At the outlet of the furnace the concentration of oxygen is equal to 5...6%, since oxygen is supplied from excess (αv = 1,2). Mechanical underburning is 0.06 %. It has been shown that the furnace provides the complete burning of 99.8 % for powdered particles of peat and 100% for volatile particles.


Key words: numerical simulation, combustion processes, solid fuel, boiler heating


Refernces (MLA)


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