Numerical simulation of dust concentration distribution in transfer site of belt conveyor
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摘要: 针对目前带式输送机转载点粉尘治理的研究主要限于除尘或降尘等具体措施且粉尘治理效果不理想的问题，从转载点粉尘形成诱因出发，分析了煤料在转载点运输过程中形成的诱导气流、剪切气流和牵引气流对粉尘析出的影响；以直线型转载点煤料受力为例，得出影响粉尘浓度分布的转载点结构参数；利用Fluent软件对不同转载点倾角、截面积及截面形状下粉尘浓度分布进行了数值模拟，结果表明：转载点倾角越大，粉尘分布范围越大，转载点出口处粉尘浓度越高；转载点截面积越大，转载点出口处粉尘浓度越低；转载点截面积相同但截面形状不同时，圆形截面转载点粉尘浓度最低。Abstract: For problem that current research on dust control at transfer site of belt conveyor was mainly limited to specific measures such as dust removal or dust reduction, which results in unsatisfied dust control effect, influences of inducing air flow, shear air flow and traction air flow which formed during coal transportation at transfer site on dust generation was analyzed starting from dust inducement at transfer site. Take force of coal material at straight-line transfer site as an example, structure parameters of transfer site which influence dust concentration distribution were obtained. Numerical simulation of dust concentration distribution under different inclination, section area and section shape of transfer site was conducted by use of Fluent software. The results show that the larger the inclination is, the larger the dust distribution range and the higher the dust concentration at transfer site outlet is. The larger the section area is, the lower the dust concentration at transfer site outlet is. When section area is the same but section shape is different, dust concentration at transfer site with circular section shape is the lowest.
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Keywords:
- belt conveyor /
- transfer site /
- dust concentration /
- dust control
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