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Study of the Influence of Cavitation and Magnetic Field on the Change of Water Properties and its Purification in a Vibrating Machine with Determination of Drive Modes

Hordieiev Anatoly, Kalda Galyna, Pashechko Mykhaylo, Hanzyuk Andriy, Tkachuk Vitaliy, Kostiuk Nazar

Advances in Science and Technology. Research Journal

2024

Vol. 18, no 3

234--245

The paper presents the results of research into the influence of low-frequency sound and magnetic fields on the change in the properties of water and its purification in a vibrating machine with an eccentric drive, which allows obtaining a constant amplitude of oscillation when the frequency of oscillations of the drive is changed. A method and construction of a vibrating machine for changing the properties of water and cleaning is proposed. Thanks to its reciprocating movement, and in the pulsation chamber and the nozzle, appropriate reactions take place. At certain oscillation frequencies, a cavitation cavity appears in the nozzle and the pulsation chamber, in which the process of splitting water molecules into active radicals takes place. At the same time, during the reciprocating movement of water through a non-magnetic nozzle, which is covered by permanent magnets, an additional effect of a variable magnetic field direction is exerted on water, which strengthens the breaking of hydrogen bonds in water molecules. Visualization of the hydrocavitation process during operation of a vibrating machine with a transparent nozzle was studied. During the experiment, changes in water parameters were studied, i.e. changes in pH, changes in the oxidation-reduction potential of treatment ORP and the total content of mineralization according to the TDS index with treatment time. The total concentration of dissolved salts decreases from 400 to 300 units, which also indicates an improvement in water quality. The rational frequency limits of the vibration drive of the machine are in the range from 18 to 23 Hz with an amplitude of oscillations of 0.002 m, and the ratio of its design parameters is determined: with a piston diameter of 0.1 m, it is recommended to use a diameter of the hole in the piston from 0.006 to 0.008 m.

Investigation of the Optimal Tightness of the Combustion Chamber of a Solid Fuel Boiler in Order to Increase its Environmental Friendliness

Tkachuk Vitaliy, Kalda Galyna, Piegdoń Izabela, Sokolan Yulia, Sokolan Katarzyna, Karazey Vitaliy

Ecological Engineering & Environmental Technology

2022

Vol. 23, iss. 5

34--41

The paper presents a model of a solid fuel boiler with the improvement of the locking mechanism to increase its efficiency, which in turn will increase the savings and ecological safety of such a boiler. The given calculation of the volume of dry gases, theoretical volume of nitrogen and the volume of water vapor, which makes it possible to determine the content of oxygen in the air and other elements in the fuel. Given a 3-D model of solid fuel boiler by means of FlowSimulation software. Based on the test results, the amount of combustion products leaving the chamber was shown. The research results show that, depending on the size of the boiler elements, there is no ventilation in the room where the boiler is located, and after an hour of operation, a long stay of a person may cause health problems. t has been shown that the excess air factor depends on the type of combustible fuel, the method of its combustion and the structure of the boiler combustion chamber. A construction of the closing mechanism of the combustion chamber of a solid fuel boiler is proposed. Based on experimental and computational research, a model of the boiler door handle was constructed, when automatic opening would be impossible. Such a design of the mechanism closing the combustion chamber of a solid fuel boiler allows to increase its efficiency as a result of the stability of the gas mixture composition and to reduce the risk of carbon monoxide falling into the room.