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设计了一种新型煤粉浓缩装置,采用正交分析方案,利用Fluent软件对16种工况下浓缩器内的煤粉气流进行了数值模拟.结果表明:角高H对阻力系数和中轴线最高浓缩比影响最为显著,其次是环边距L,综合考虑后确定该浓缩器最佳结构参数为:角高H=50 mm,环边距L=50mm,覆盖率h=0,浓缩间距X=120 mm,浓缩角α=30°.在最佳结构参数下,对管式煤粉浓缩器进行了数值模拟验证,结果表明:管式煤粉浓缩器的中轴线最高浓缩比达到6.96,而阻力系数仅为2.492,在阻力增加不多的情况下基本实现了高度浓缩.
A new type of pulverized coal concentration device was designed and the orthogonal design was used to simulate the flow of pulverized coal in the concentrator under 16 operating conditions by using Fluent software.The results showed that the angle H was the highest for the coefficient of drag and the highest axis Concentration ratio is the most significant, followed by the ring edge distance L, considering the best configuration parameters to determine the concentrator: angle height H = 50 mm, the ring edge distance L = 50mm, coverage h = 0, concentration spacing X = 120 mm, concentration angle α = 30 ° under the optimum structural parameters of the tubular pulverized coal concentrator was verified by numerical simulation. The results show that: the maximum concentration ratio of tubular pulverized coal concentrator axis reached 6.96, while the resistance The coefficient is only 2.492, basically achieving a high degree of concentration without much increase in resistance.