Original scientific paper

https://doi.org/10.17559/TV-20151002110105

Experimental investigation about the influence of airflow on droplet sizes of mechanical nozzles for coal mining face

Gang Zhou ; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China
Mao Xu ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China
Han Qiu ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China
Wen Nie ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China
Weimin Cheng ; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China
Cong Chen ; College of Mining and Safety Engineering, Shandong University of Science and Technology, Qianwangang Road 579, 266590 Qingdao, China

Abstract

High-pressure spraying is one of the primary methods for dust prevention in coal mine fully mechanized caving face, and the atomization effects of mechanical nozzles influence dedusting result significantly. While so far, the nozzles are selected by technician’s subjective arbitrariness mainly, affecting improving dedusting effect. For this reason, before and after simulating actual air velocity of coal workface, the comparative experiments on the atomization effects of the six kinds of commonly used mechanical nozzles were conducted with self-designed spraying platform. Based on the test data, the average droplets’ size and the atomization quality order of different mechanical nozzles were obtained, moreover, the airflow’s turbulence influence on droplets’ sizes was induced. Finally, according to the experimental results, nozzles used in external spray of shearer were selected for #10310 working face of Xinglongzhuang coal mine in China, which had achieved great dust reduction effects.

Keywords

coal mine fully mechanized caving face; dust suppression; different types of mechanical nozzles; engineering application; simulating air velocity; turbulence influence to droplet sizes

Hrčak ID:

190167

URI

https://hrcak.srce.hr/190167

Publication date:

3.12.2017.

Article data in other languages: croatian

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