多出口稀相气力输送过程分析与计算OA

In order to optimize the structure of multi-outlet dilute phase pneumatic conveying pipeline and realize multi-point uniform discharge,the flow characteristics of dilute phase pneumatic conveying in four-outlet branch pipeline with two structural forms were simulated and studied by using the particle fluid dynamics simulation software Barracuda and Wen-Yu drag force model.Taking the partial flow coefficient as the evaluation index,the degree of partial flow of the two structures was compared,and the influence of conveying conditions and fluidization distributor structure on the uniformity of discharge was analyzed.The results show that the discharge quantity of each outlet is more uniform in the pipeline with fluidization distributor.Both the conveying volume and the conveying gas velocity affect the flow characteristics in the pipe.The deviation coefficient increases continuously with the conveying volume increasing,and the deviation coefficient decreases continuously with the inlet gas velocity increasing.With the increase of the diameter-height ratio of the cylindrical part of the fluidization distributor,the deviation coefficient increases first and then decreases,and the deviation coefficient is the largest when the diameter-height ratio is 10∶7.With the increase of the volume of the fluidization distributor,the deviation coefficient increases continuously.For the pipeline with four outlets,the recommended diameter is 300-600 mm.The research results provide a basis for the design and optimization of industrial multi-export dilute-phase pneumatic conveying pipelines.