Abstract
In the paper, the investigation of new advanced cascades of four-flow separating elements with three withdrawals has been presented. The numerical calculation of main parameters of different cascade schemes of such separating elements has been carried out. The efficiency analysis of a work of considered cascade schemes has been made based on obtained data about the distribution of matter flow and the distribution of component concentrations of a work mixture in each point of cascade. The biggest performance coefficient η has the counter-current symmetric connection scheme with extended zones of additional depletion. It has been demonstrated that the performance coefficient for this scheme does depend neither on a number of separating elements in cascade nor on characteristics of separating process. The permanence of coefficient η allows us to evaluate a size of the cascade for given external parameters, what has a practical reason under planning of energy level consumption of a future separation plant.
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