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Development of a novel wind-assisted centralized spraying dedusting device for dust suppression in a fully mechanized mining face

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Abstract

Aiming at addressing serious pollution in the No. 30106 fully mechanized coal mining face of Shiquan Coal Mine during coal cutting process, the spraying device between hydraulic supports was improved through the combination of experimental analysis, numerical simulation, and field measurement, and a novel wind-assisted centralized spraying dedusting device was developed. The newly developed device could make the formed spraying field more concentrated on the dust-producing source around the coal shearer’s drum, and thus significantly enhanced the spraying performance. According to numerical simulation results, the spraying performance reached the optimum at a hydraulic pressure of 8 MPa for the spraying device and an air pressure of 1 MPa for the pneumatic motor; under these optimal conditions, the droplet concentration in the spraying field around the coal cutter drum was as high as 24.85 g/m3, and the formed high-concentration spraying field could basically cover the whole section in the spraying field from coal wall to the support pillar. Field measured results revealed that, at a hydraulic pressure of 8 MPa and an air pressure of 1 MPa, the dust suppression rate around coal cutter driver reached up to 87.96%, suggesting that the developed wind-assisted centralized spraying dedusting device had remarkable dust suppression performance and could effectively improve the operating environment in the fully mechanized mining face.

In this paper, we have designed a novel wind-assisted centralized spraying dedusting device and studied the optimal spray parameters. Firstly, the nozzles were selected according to the multi-factor experimental platform for measuring the spraying field’s atomization characteristics. Secondly, we had a numerical simulation of the fully mechanized mining face. And the third, we tested the effect of dust removal.

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Funding

This work has been funded by the National Natural Science Foundation of China (NO. 51874191 and 51404147), the Focus on Research and Development Plan in Shandong Province (NO.2017GSF20111), the National Key R&D Program of China (2017YFC0805201), the China Postdoctoral Science Foundation (NO.2015M570601 and 2017T100503).

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Authors and Affiliations

  1. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, 266590, China

    Huitian Peng, Wen Nie, Peng Cai, Qiang Liu, Zhiqiang Liu & Shibo Yang

  2. State Key Laboratory of Mining Disaster Prevention and Control Co-found by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao, 266590, China

    Huitian Peng, Wen Nie, Peng Cai, Qiang Liu, Zhiqiang Liu & Shibo Yang

Authors
  1. Huitian Peng
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  2. Wen Nie
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  3. Peng Cai
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  4. Qiang Liu
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  5. Zhiqiang Liu
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  6. Shibo Yang
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Corresponding author

Correspondence to Wen Nie.

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Responsible editor: Philippe Garrigues

Highlights

• A novel wind-assisted centralized spraying dedusting device was designed.

• The droplet concentration distribution rules of a fully mechanized mining face were analyzed by numerical simulation.

• Field measurement showed that the spraying device achieved very good dusting effect.

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Peng, H., Nie, W., Cai, P. et al. Development of a novel wind-assisted centralized spraying dedusting device for dust suppression in a fully mechanized mining face. Environ Sci Pollut Res 26, 3292–3307 (2019). https://doi.org/10.1007/s11356-018-3264-8

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  • DOI: https://doi.org/10.1007/s11356-018-3264-8

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