An experimental comparison of the spray performance of typical water-based dust reduction media

Wang, Hetang; Du, Yunhe; Xiang, Wei; He, Xuhua

doi:10.1016/j.powtec.2019.01.032

Cited by 76 publications

(14 citation statements)

References 16 publications

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“…The 3D traverse system had a positioning resolution of 10 µm and was controlled by 2D-LDA/PDA analyzer software. During the tests, subsequent droplets passed through a small sample volume in the area of two intersecting laser beams, scattering the light by refraction [24][25][26]. The receiving optics were set at an angle of 43.5 • in relation to the laser beam, which ensured the dominance of the refraction of the light scattering mode.…”

Section: Methodsmentioning

confidence: 99%

Analysis of Volume Distribution and Evaluation of the Spraying Spectrum in Terms of Spraying Quality

2020

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Assessment of the quality of the operation of agricultural nozzles on the basis of transverse volume distribution and spatial methods of analysis for stream spraying spectra is insufficient, and positive result do not guarantee that the intended and effective spraying effects are obtained. Tests were carried out to assess the quality of nozzles on the basis of transverse volume distribution analysis, microstructure characteristics, and detailed analysis of places where an unexpected change in the nature of the transverse volume distribution (increase in volume) was noted. The subjects of the study were RS11003 flat fan nozzles and a measuring stand equipped with a grooved table, which was used to carry out tests. During the tests, the unit flow rate from the nozzles, the transverse volume distribution of liquids from individual table grooves, and the corresponding CV distribution coefficients of variation were recorded. Detailed tests were carried out for the selected nozzle, consisting of spot measurement of droplet characteristics in individual liquid stream bands. The widths of these bands were constant and equal to the width of the measuring table groove. Measurements were made using analyzer 2D-Laser Doppler Anemometry/Phase Doppler Anemometry (2D-LDA/PDA) from Dantec Dynamics. The analysis of the results obtained from the grooved table and the droplet characteristics in individual stream bands showed clear and unexpected changes in the nature of the transverse volume distribution for all tested nozzles. These changes, consisting of a local increases in droplet diameters (with a reduced number of occurrences), can cause a significant reduction in the quality and effectiveness of spraying, despite the positive fulfillment of generalized normative criteria for their assessment.

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Section: Methodsmentioning

confidence: 99%

Analysis of Volume Distribution and Evaluation of the Spraying Spectrum in Terms of Spraying Quality

2020

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“…Currently, the main dust prevention methods in underground coal mine include preinjection of water into coal, ventilation, exhausting of dust, purification of air by dust remover, spraying, and dust isolation via enclosing [19][20][21][22][23][24][25]. Spraying has been extensively applied in underground mines for dedusting due to the low cost, convenient operation, and practicability [26][27][28][29][30][31].…”

Section: Introductionmentioning

confidence: 99%

Effects of Metamorphic Degree of Coal on Coal Dust Wettability and Dust‐Suppression Efficiency via Spraying

Wang

Han

Liu

et al. 2020

Advances in Materials Science and Engineering

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Currently, spraying is a main means for dust prevention and control in underground coal mines. The dust-suppression efficiency via spraying is highly correlated with the wettability of coal dusts. There are many factors affecting the wettability of coal dust, among which coal’s metamorphic degree has great influence. In order to gain in-depth knowledge of the effects of coal metamorphic degree on coal dust wettability and the dust-suppression efficiency via spraying, 6 coal dust samples with different metamorphic degrees were collected and used in the study. In the experiments, the microproperties, wetting performance, and dust-suppression efficiency via spraying were measured. According to the experimental results of coal’s microproperties, with the improvement of metamorphic degree, the content of hydrophilic oxygen-containing functional groups on the surface, the surface roughness, the specific surface area, and the interpore diameter all decreased. In addition, as coal’s metamorphic degree was enhanced from lignite to meager-lean coal, the wettability of the coal dust dropped. On the other hand, as the metamorphic degree of coal quality continued to be improved to anthracite, the wettability of the coal dust increased instead. The measured results revealed that the dust-suppression efficiency via spraying was highly correlated with the wettability of coal dust. The coal dust with better wettability exhibited higher dust-suppression efficiency via spraying. With the increase of water-supply pressure, the effect of coal dust wettability on the dust-suppression efficiency via spraying was weakened, and the difference of dust-suppression efficiency among different coal dust samples was narrowed.

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“…The suspended dusts in the air pose a serious threat to the health of workers and the safety of mines (Xu et al, 2019a;Ahmed et al, 2017;Zhou et al, 2018a;Wang et al, 2019g;Hua et al, 2020). According to the National Occupational Diseases Statistics Report issued by the National Health Commission of China, in recent years, the new cases of pneumoconiosis in China are mainly distributed in the coal mining and non-ferrous metal mining industries.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance Analysis of a Spray Dust Suppressant for Coking Coal Dust

Jiang

Wang

Pei

et al. 2020

Preprint

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Coking coal dust has strong hydrophobicity, and it is difficult to combine with droplets in the air and settle. In order to improve the ability of droplets to collect coking coal dusts, a spray dust suppressant for coking coal dusts was studied. Based on monomer optimization and compounding experiments, two types of surfactant monomers, fatty alcohol ether sodium sulfate (AES) and sodium dodecyl benzene sulfonate (SDBS), were selected as the surfactant components for the dust suppressant. Meanwhile, the surfactant monomers were combined with four inorganic salts and the reverse osmosis moisture absorption of each solution was measured. By combining the results of both reverse osmosis moisture absorption and the water retention experiments, CaCl 2 was selected as the inorganic salt auxiliary component for the dust suppressant. Finally, the best concentration combination of the three components were obtained using orthogonal experiments, i.e., AES (0.05%), SDBS (0.03%), and CaCl 2 (0.6%). The dust suppressant solution constituted by this scheme had a high moisture absorption and great performance.

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An experimental comparison of the spray performance of typical water-based dust reduction media

Cited by 76 publications

References 16 publications

Analysis of Volume Distribution and Evaluation of the Spraying Spectrum in Terms of Spraying Quality

Analysis of Volume Distribution and Evaluation of the Spraying Spectrum in Terms of Spraying Quality

Effects of Metamorphic Degree of Coal on Coal Dust Wettability and Dust‐Suppression Efficiency via Spraying

Preparation and Performance Analysis of a Spray Dust Suppressant for Coking Coal Dust

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