Economic evaluation of the rationality of using multivortex separators in painting and drying chambers
Abstract. The article provides an economic assessment of the feasibility of application of multi-vortex separators designed to increase the operational life of fine filters in the technological line of an enterprise with paint-drying chambers. It is shown that the rapid wear of fine filters leads to the need for their frequent replacement. As a result, there are significant economic costs. To increase their service life, multi-vortex separators are proposed. The principle of their operation is described. An economic calculation has been carried out for 3 variants of integrating multi-vortex separators into the production line: 1) in front of ceiling filters; 2) in front of floor filters; 3) in front of ceiling and floor filters. In the work, such parameters as cash flow, discounted payback period, net discounted income and profitability index were calculated. The results showed that the project for the introduction of multi-vortex separators into the paint-drying chamber is cost-effective if their efficiency is more than 0.4, since the PI profitability index is more than 1. The net discounted income of the NPV project with the efficiency of multi-vortex separators from 0.4 to 0.8 is from 159.6 to 749.12, from 976.1 to 2417.4 and from 1135.7 to 3166.5 thousand rubles, when implementing the project for options 1, 2 and 3, respectively, with the useful life of the separator N = 10 years. The payback period of the project is from 12 months. As a pilot project, 1 option can act, i.e. the placement of multi-vortex separators in front of ceiling filters. This is due to the minimum investment costs among all options, amounting to 150,000 rubles and a relatively fast discounted payback period of the project, ranging from 12 to 39 months, depending on the effectiveness of multi-vortex separators.
Keywords: economic efficiency, multi-vortex separator, filter, calculation, payback period
Highlights:
♦ an economic assessment was made of the feasibility of introducing a multi-vortex separator designed to capture fine particles from the air up to 10 microns in size;
♦ economic calculations were carried out for 3 different options for integrating multivortex separators into the production line of the enterprise;
♦ the influence of the efficiency of multi-vortex separators on the change in the discounted payback period of the project and the profitability index depending on their location are considered.
Vadim E. Zinurov, Alsu R. Galimova - Kazan State Power Engineering University, Kazan, Russia; Rustem Ya. Bikkulov - Kazan National Research Technological University, Kazan, Russia