EXTENSION OF THE RESOURCE OF THE BURNER SWIRL BLADES OF THE BOILER TPP-312


  • S.G. Kobzar Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • I.I. Borisov Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine
  • A.A. Khalatov Institute of Engineering Thermophysics of the National Academy of Sciences of Ukraine

Abstract

Numerical research of high-temperature corrosion of steel blades of the swirler of a pulverized coal burner of the TPP-312 boiler in real conditions of its operation is carried out. Data on the dynamics of oxidation of the blade surface for two steels and different operating conditions of the burners were obtained. The results of the calculation allow a reasonable assessment of the service life of the blades of the burner device. Corrosion rate calculations were performed based on the results of computer simulation of pulverized coal combustion in the boiler volume with subsequent determination of the temperature field on the blade surface.

The corrosion dynamics was determined using the experimental oxidation constants of steel given in the literature. Data were obtained for two types of low-carbon steel, two different modes of burner operation, for the number of blades 8 and 24, and for different distances of burner blades from the embrasure of the boiler furnace, a total of 16 different variants were calculated.

Calculations have shown that with increasing the distance of the blades from the embrasure of the furnace, corrosion is significantly reduced. The highest corrosion, which in its absolute value is comparable to the thickness of the blade, occurs for the disconnected burner with blades from Art. 3. The lowest corrosion occurs for the working burner with blades made from steel 20 (reduction of corrosion by 4 times), and for the disconnected burner this dependence is much smaller (reduction of corrosion by 30… 40%). References 6, Figures 5

References

1. 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 No6 DTEK of Ladyzhin Thermal Power Station] // [NTU "KhPI" Bulletin: Power and heat engineering processes and equipment], 2014, 13(1056). – pp.85–91. (Ukr)
2. Kobzar S.G., Borisov I.I., Khalatov A.A. [Modelling of Corrosion of the Burner Swirling Blades of the Boiler ТPP-312] // [Energy Technologies and Resource Saving], 2019, №4, pp. 56–61. (Ukr)
3. 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. Vol. 59, No. 5/6. P. 433–468.
4.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/ Vol. 8, No. 4, P.365-369.
5. Temliantsev N.V. [Improuving the quality of steel plates through the use of rational modes of steel heating in furnaces and deformation scale removal], Autoreferat, Novosibirsk, 2007, 23 p. (Rus)
6. Ots А.А. [Corrosion and wear of heating surfaces of boilers], Publishing house “Energoatomizdat” 1987, Moscow, 272 p. (Rus.)

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PDF Downloads: 99
Published
2020-06-22
How to Cite
Kobzar, S., Borisov, I., & Khalatov, A. (2020). EXTENSION OF THE RESOURCE OF THE BURNER SWIRL BLADES OF THE BOILER TPP-312. Thermophysics and Thermal Power Engineering, 42(3), 61-67. https://doi.org/https://doi.org/10.31472/ttpe.3.2020.7
Section
Fuel Utilization and Burning, Heat Power Units, Ecology

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