Effects of spraying pressure and installation angle of nozzles on atomization characteristics of external spraying system at a fully-mechanized mining face
Effects of spraying pressure and installation angle of nozzles on atomization characteristics of external spraying system at a fully-mechanized mining face
复制标题
喷洒压力和喷嘴安装角度对综采工作面外喷洒系统雾化特性的影响
DOI：
10.1016/j.powtec.2018.11.042
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发表时间：
2019-02
影响因子：
5.2
通讯作者：
Changwei Xu
中科院分区：
文献类型：
--
作者：
Shibo Yang;Wen Nie;Shasha Lv;Zhiqiang Liu;Huitian Peng;Ma Xiao;Changwei Xu
摘要为有效抑制综采工作面截割滚筒周围粉尘浓度过高及粉尘颗粒扩散问题，采用实验、数值模拟和现场实测相结合的方法，对外喷雾系统的抑尘性能进行了深入研究。首先，对优化后的喷嘴进行了雾化特性测试。实验结果表明，在8 MPa的喷雾压力下，孔径为2.0 mm、导流芯为X型的混合喷嘴（B型喷嘴）具有最佳的雾化性能，喷雾角约为81.9°，有效喷雾范围约为2.56 m。其次，利用ANSYS Fluent软件对外喷雾系统的抑尘性能进行了数值模拟。结果表明，当喷嘴倾角为30°，喷雾压力为8 MPa时，形成的喷雾场可覆盖转鼓周围的整个产尘区域。同时，滚筒附近的喷雾场不受气流的影响，防止了粉尘颗粒被气流分散，减轻了污染。最后，在石泉煤矿30106工作面进行了现场试验，结果表明，该系统的平均综合降尘效率可达90.10%，有效地解决了该综采工作面的粉尘问题。综上所述，本文研究的措施能够有效解决综采工作面采煤过程中的粉尘污染问题。
Abstract Aiming to effectively suppress excessively high dust concentration around the drums during coal cutting and the related dust particle dispersion issues at a fully-mechanized mining face, the present study employed experiments, numerical simulations, and field measurements to carry out an in-depth investigation of the dust suppression performance of an external spraying system. Firstly, the atomization characteristics of the nozzles with optimized macro-atomization performances were tested. According to the experimental results, hybrid nozzles with an orifice diameter of 2.0 mm and an X-shaped diversion core (type-B nozzles) delivered the best overall atomization performances at a spraying pressure of 8 MPa; in this case, the spraying angle and the effective spraying range were approximately 81.9° and 2.56 m, respectively. Next, numerical simulations were conducted to assess the dust suppression performances of an external spraying system, using ANSYS Fluent software. The results showed that, when the nozzles were installed at an inclination angle of 30° and operated at a spraying pressure of 8 MPa, the spray field formed could cover the whole dust-producing region around the drum. Meanwhile, the spray field near the coal cutter drum was not affected by airflow, which prevented dust particles being dispersed by the airflow, leading to a mitigation of pollution. Finally, field testing at the No. 30106 mining face of the Shiquan Coal Mine indicated that the mean overall dust suppression efficiency could reach up to 90.10%, i.e. the dust particles at this fully-mechanized mining face were effectively settled. To conclude, the dust pollution issues at a fully-mechanized mining face during the coal cutting process were adequately addressed by the measures investigated here.
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影响因子：
5.2
作者：
Haiming Yu;Weimin Cheng;Hao Wang;Huitian Peng;Xie Yao
通讯作者：
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影响因子：
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影响因子：
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影响因子：
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影响因子：
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作者：
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