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采用气固两相流双流体连续模型,结合颗粒动力学方法,运用计算流体力学的手段,对PC中试生产装置垂直管中的气力输送过程进行了初步数值模拟,在所要求的输送条件下,依据输送压降和投资费用的综合影响,计算出最佳管径为50mm,根据颗粒相轴向速度分布,分析出在满足最大输送能力的情况下,应减少管径,有利于提高固气比,有利于减少能源消耗,提高经济效益。计算出不同输送气速下的压降,压降最低点所对应的输送气速就是最佳经济速度,最佳经济速度随输送量的增大而增大,不同输送量下最佳经济速度点的连线,为最佳经济速度线。
The gas-liquid two-phase continuous flow model of gas-solid two-phase flow was used in combination with the particle dynamics method to simulate the pneumatic conveying process in the vertical pipe of the PC pilot plant by means of computational fluid dynamics. Under the required conveying conditions , According to the combined effect of transportation pressure drop and investment cost, the optimal pipe diameter is calculated to be 50mm. According to the axial velocity distribution of the particle phase, it is analyzed that if the maximum conveying capacity is met, the pipe diameter should be reduced and the solid gas Than, is conducive to reducing energy consumption, improve economic efficiency. Calculating the pressure drop under different delivery gas velocities, the corresponding delivery gas velocity is the best economic speed, and the optimal economic speed increases with the increase of feed volume. The optimal economic speed under different feed rates The connection for the best economic speed line.