Valerii Kolesnyk, Artem Pavlychenko, Olena Borysovska, Yurii Buchavyi, Daria Kulikova. Justification of the method of dust emissions localization on mobile crushing and sorting complexes of quarries with the use of air-and-water ejectors

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Parent Category: Geo-Technical Mechanics, 2020
Category: Geo-Technical Mechanics, 2020, № 154

Geoteh. meh. 2020, 154, 84-96

https://doi.org/10.1051/e3sconf/202016800029

 

JUSTIFICATION OF THE METHOD OF DUST EMISSIONS LOCALIZATION ON MOBILE CRUSHING AND SORTING COMPLEXES OF QUARRIES WITH THE USE OF AIR-AND-WATER EJECTORS

 1Valerii Kolesnyk, 1Artem Pavlychenko, 1Olena Borysovska, 1Yurii Buchavyi, 1Daria Kulikova

1National Technical University "Dnipro Polytechnic" of the Ministry of Education and Science of Ukraine

Language: English

Abstract. Rock mass transloading from bunkers to conveyors or from conveyors to conveyors in quarries is accompanied by intense releases of dust into the atmosphere, which is a significant danger to the environment. The regularities of the interaction process between dust particles and droplets of a liquid (water) in polluted air flow are determined. It is established that when the pressure of compressed air is changed from 0.1 to 0.4 MPa (approximately in the range of 1 to 4 atm.), the average size of droplets decreases from 26 to 9 microns. Justification of the localization method of dust emissions into the atmosphere, arriving from the units of dust formation in crushing and sorting complexes of quarries, is done with the use of air-and-water ejectors − irrigators with highly efficient water use, sprayed with separate nozzles. Variants of air-and-water ejectors placement on dust formation sources are grounded. The choice of the optimal mode of air-and-water ejectors operation depends on the characteristic sizes of the formed dust particles, which are determined by the parameters of the crushing and sorting equipment in the quarry. Reducing dust emissions within the sanitary protection zone of the quarries prevents its dispersion in the adjacent zone.

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