Feasibility study of the use of a multi-vortex classifier-separator
Abstract. The article presents a feasibility study of the use of a multi-vortex classifier-separator for fractionation of fine bulk material based on silica gel. In the course of the study, the technical and economic method of comparing devices was applied. Technically, the analysis is based on a comparison of technical characteristics, fractionation efficiency, air flow, hydraulic resistance, and other parameters. From an economic point of view, the comparison process is determined by financial characteristics, factors affecting the cost. The objects of evaluation were the following indicators: annual savings of funds due to a decrease in the electricity consumption for the year and savings of funds due to a decrease in the electricity consumption spent on obtaining 1 kg of the finished product. The paper compares the multi-vortex classifier-separator developed by the authors with 3 positions of close analogues. During the evaluation calculations, it was assumed that in the case of not 100% fractionation efficiency, repeated grinding is performed once. The air flow rate for all devices was assumed to be 2000 m3/hour, the specific concentration of the material was assumed to be 200 g/m3, the fractionation efficiency was set from 20% to 100%. During the evaluation calculations, it was found that the use of a classifier-separator allows to obtain annual savings of money by reducing the electricity consumption for the year relative to classifier № 2, cyclone classifier and classifier № 4 on average with fractionation efficiency from 20% to 100% equal to 45.4, 503.1 and 421.5 million rubles, respectively. At the same time, the annual savings of money due to the reduction in the electricity consumption spent on obtaining 1 kg of the finished product, relative to classifier № 2, cyclone classifier and classifier № 4, on average, amounts to 10.1, 111.7, 93.6 rubles/kg, respectively.
Keywords: classifier, cyclone classifier, technical and economic method, economic justification, profitability of the use of the device, the introduction of the device, technical and economic comparison
Highlights:
♦ a feasibility study of the application of the developed multi-vortex classifier-separator for fractionation of fine bulk material based on silica gel with a separation boundary of less than 50 microns has been carried out;
♦ the cost of electricity spent on obtaining 1 kg of the finished product by various classifier models with fractionation efficiency from 20% to 100 is obtained%;
♦ the article considers the change in the annual savings of money due to the reduction of the electricity consumption for the year when the finished product is released and the savings of money due to the reduction of electricity consumption spent on obtaining 1 kg of the finished product.
Vadim E. Zinurov, Alsu R. Galimova, Irina G. Akhmetova - Kazan State Power Engineering University, Kazan, Russia; Ilnur N. Madyshev - Nizhnekamsk Institute of Chemical Technology (branch) Kazan National Research Technological University, Nizhnekamsk, Russia