MODELLING OF CORROSION OF THE BURNER SWIRLING BLADES OF THE BOILER ТPP-312
The corrosion rate was calculated for steel blades of a swirler of a dust coal burner of the boiler TPP-312 in real conditions of its operation. The material used is steel 3 and steel 20. At the first stage, computer modelling of the thermogas dynamics of the flow in the burner, the process of coal burning in the boiler furnace, was carried out with the aim of determining the temperature state of the blades. At the second stage, using the experimental constants of the heterogeneous oxidation reaction, the calculations of the increase in the mass of the blade material per unit surface and the decrease in the thickness of the base material were carried out. The data obtained on the dynamics of oxidation of the surface of the blades for different operating modes of the burners. Calculations showed that the oxidation process is affected by the type of material of the blade, the number of blades, as well as the mode of operation of the burner. The obtained results allow a reasonable assessment of the service life of the burner blades. Ref. 5, Fig. 4, Tab. 1.
Chen R.Y., Yuen W.Y.D. Review of the High-Temperature Oxidation of Iron and Carbon Steels in Air or Oxygen. Oxidation of Metals. 2003. 59 (5/6). pp. 433–468.
Trindade V.B., Borin R., Hanjari B.Z. Yanga S., Kruppa U., Christa H-J. High-Temperature Oxidation of Pure Fe and the Ferritic Steel 2.25Cr1Mo. Materials Research. 2005. 8 (4). pp. 365–369.
Temliantsev N.V. [Improving the quality of steel plates through the use of rational modes of steel heating in furnaces and deformation scale removal. Autoreferat]. Novokuznetsk, 2007. 23 p. (Rus.)
Ots А.А. [Corrosion and wear of heating surfaces of boilers], Moscow : Energoatomizdat, 1987. 272 p. (Rus.)
Kobzar S.G., Khalatov A.A. [Determining the efficiency of the reduction of nitrogen oxide emissions using the system of stage coal combustion of the TPP-312 boiler block No. 6 DTEK of Ladyzhin Thermal Power Station]. Visnyk NTU KhPI. Ser.: Energetychni ta teplotehnichni procesy j ustatkuvannja [NTU KhPI. Bulletin: Power and heat engineering processes and equipment], 2014, No. 13. pp. 85–91. (Ukr.)