Pressure loss during expansion of local resistance pipes in a mixture of air and fibrous waste

Аннотация

In this article, to ensure the efficiency of cotton fiber production on a global scale, based on the results of research to improve the quality and reduce the cost of production, to identify and eliminate factors that negatively affect the quality of products at all stages of cotton production, as well as in the processes of transporting cotton using pneumatic transport, to create resource-saving technologies that reduce the cost of production, air and fiber waste, taking into account that the local resistance of the mixture will be associated with pressure losses. His theoretical research on these problems and analytical developments have not been widely studied, the reason for which is that a general theoretical analytical method for calculating local resistances has not yet been developed. On the basis of the analysis, theoretical equations of motion of a mixture of air and fibrous waste in currently used pneumatic transport systems in the pipeline expansion section are developed. The dependence of the expansion angle of the expanding pipeline on local resistances arising in the expanding part of the pipeline during the movement of air and fibrous waste at a cotton gin plant is theoretically proved. Based on the results obtained, it was proved that the optimal value of the local resistance is equal to the local resistance » 0,06 x C when the expansion angle of the expansion pipe is ap = 29° .