煤粉浓缩器阻力特性的试验研究

An Experimental Investigation of the Resistance Characteristics of Pulverized Coal Concentrators

采用近似模化法研究了两种不装导流板的煤粉浓缩器———丘体和百叶窗的阻力随结构参数变化的特性。试验结果表明，随着丘体斜面长度的增加，阻力系数增大。对于百叶窗，阻力系数随着叶片倾角或叶片宽度的增加而增大，叶片间距比的变化对流体流动影响比较大，它在２．５～３．０之间变化时，流动阻力较小。

By the use of an approximation simulation method a study was conducted of two types of pulverized coal concentrator without guide plates with respect to the variation of their mound body and louver resistance characteristics with the change of structural parameters. The test results show that with the increase in mound body inclined surface length there is an increase in the resistance factor. The louver resistance factor increases with an increase in the blade inclined angle or blade width. The variation of blade spacing ratio has a fairly significant effect on fluid flow. A relatively small flow resistance is observed when the blade spacing ratio has a variation interval of 2.5 ～3.0.