Abstract:Abstract:In order to investigate the conveying characteristics of dense phase pulverized coal in bend pipe, a mathematical model of dense phase particle pneumatic conveying was established by using the kinetic theory of granular flows and introducing the improved frictional resistance coefficient of particles and radial distribution function. And then mathematical model was used to simulate the pressure drop and flow distribution of dense phase pulverized coal pneumatic conveying in 90° bend pipe with vertical rotating to level. The results show that the phenomena of second flow zone, vortex zone, subsidence zone, and particle packing are found in the place where the pipe is bending; and the total pressure drop of bend pipe increases with the increasing of particle size of the pulverized coal particles, the solidgas ratio, as well as the conveying speed, respectively. These findings are of great significance for the conveying conditions of dense phase pulverized coal pneumatic conveying as well for the design of pipelines.
代婧鑫1,丁学勇1,许海法2,刘程宏1,居天华1. 弯管中高浓度煤粉气力输送流动特性的模拟[J]. 钢铁研究学报, 2020, 32(5): 377-385.
DAI Jing-xin1,DING Xue-yong1,XU Hai-fa2,LIU Cheng-hong1,JU Tian-hua1. Numerical simulation of conveying characteristics of dense phase pulverized coal in bend pipe. JOURNAL OF IRON AND STEEL RESEARCH , 2020, 32(5): 377-385.