Feasibility study of the introduction of separation devices with arc-shaped elements in fluidized bed reactors

The article provides a feasibility study for the introduction of separation devices with arc-shaped elements (SDwAE) in fluidized bed reactors. It has been shown that the currently used cyclone separators in reactors have a number of disadvantages. SDwAE was proposed as a replacement. A model of a separation device is presented and the mechanism of its operation is described. The proposed arrangement of 6 SDwAE in a reactor to replace 12 cyclone separators is shown schematically. An estimated economic calculation showed that the cost of the project for the implementation of 6 SDwAE in reactors is estimated at 5,726 thousand rubles, which is 2.6 times cheaper than analogues (12 cyclone separators). When comparing the technical characteristics of separation devices, it was found that most of the parameters of 6 SDwAE are better than 12 cyclone separators: metal consumption 5119 kg (1.4 times lower), hydraulic resistance of about 3600 Pa (2.5 times lower), wear of the catalyst and walls device is lower due to lower operating speeds. In the course of the economic assessment of the project using the SDwAE, the following parameters were considered: discount factor Kd, discounted cash flows DCF, net present value NPV, profitability index PI and discounted payback period DPP. Possible scenarios for increasing IC to 15,000 thousand rubles are analyzed. Calculation of the profitability index PI for different initial costs of the IC project from 5726 to 15000 thousand rubles. showed that it is cost-effective, i.e. PI > 1, only in those cases in which financial flows per year CF, considering depreciation charges, are at least 1867 thousand rubles. The discounted payback period of the DPP project is 1.4 – 6.6 years with financial flows per year CF equal to 1867 – 5500 thousand rubles with the initial cost of the IC project equal to 5726 thousand rubles.

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