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在自主研发的高压密相气力输送实验台上进行不同配比的生物质粉与煤粉混合物的输送实验,对比分析输送不同物料时,直管和弯头等管段的阻力特性,研究结果表明生物质粉与煤粉混合物在此系统上可以稳定、可控输送。在固气体积比μv相差不大的情况下,直管和弯管的压降随着表观气速的增加而增大;表观气速相同时,粉体中煤粉配额增大,各管段压降随之增大。此外,根据Barth附加压力损失理论,运用量纲分析法,考虑气体与粉体密度以及输送几何条件等对压降的影响,得到了各管段的压降回归公式,此公式有较好的预测效果。
In the independent research and development of high-pressure dense-phase pneumatic conveying experimental platform for different proportions of biomass powder and pulverized coal mixture transportation experiment, comparative analysis of different materials conveying, straight pipe and elbow pipe section of the resistance characteristics of the results show that biomass Powder and coal mixture in this system can be stable, controlled delivery. When the volume of solid gas is smaller than that of μv, the pressure drop of straight pipe and elbow increases with the increase of apparent gas velocity. When the apparent gas velocity is the same, the quota of coal in powder increases Pipe pressure drop increases. In addition, according to the theory of pressure loss attached to Barth, the pressure drop regression formula of each pipe section is obtained by using the dimensional analysis method, considering the influence of gas and powder density and conveying geometry on the pressure drop. This formula has a good prediction effect .