Engineering and Technology Journal

An Experimental Investigation of The Dynamic Effects in Upper Drum Boiler Under Steam Mass Flow Rate Variation

Document Type : Research Paper

Authors

Electromechanical Engineering Department, University of Technology, Baghdad, Iraq

Abstract

The dynamic effects in the “upper“ drum of the boiler (mechanical’s effects) are very complex problems and critical due to the pressure disturbance in the upper drum of the boiler. This work deals with an experimental investigation of the dynamic behavior of the boiler drum level system is reported from plant data (Al-Quds power plant) in Baghdad / Iraq under a particular condition of operating, and the mathematical equations of the boiler model variables explained and defined. The dynamic effects are investigated with increasing steam mass flow rate (10% and 20%) at the outlet of the boiler. The results showed that the rapid rise in the rate of steam mass flow causes the dynamic effects to increase (shrink and swell) by 15%, rates of evaporation and thus causes an increase in the volume of water inside the upper drum boiler that causes overheating in the tubes.

Highlights

  • Rapid rise in the steam mass flow rate causes the increase in dynamic effects.
  • The pressure disturbance in the boiler's upper drum cause mechanical effects.
  • Drum level fluctuations cause interactions with the controls of boiler combustion.
  • Interactions with the controls, resulting inefficient and dangerous operations.

Keywords

References

 

[1] S. R. Tawfeic, “Boiler drum-level modeling,” JES. Journal of Engineering Sciences , vol.41, no.5, pp. 1812-1829, September and October 2013.
[2] A. S. E. Din Ahmed, M. A. Elhosseini, and H. Arafat Ali, “Modelling and practical studying of heat recovery steam generator (HRSG) drum dynamics and approach point effect on control valves,” Ain Shams Eng. J., vol. 9, no. 4, pp. 3187–3196, 2018.
[3] Wohlfarth, Ray, and A. L. Kohan, “Boiler operator's guide,” McGraw-Hill Education, 2021. ‏
[4] S. Kim, S. Choi, T. H. Song, and J. Lappalainen, “Dynamic simulation study of the steam temperature in a ultra-supercritical circulating fluidized bed boiler system,” Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 2020. ‏
[5] W. Zima. “Simulation of rapid increase in the steam mass flow rate at a supercritical power boiler outlet,” Energy 173, pp. 995-1005, 2019. ‏‏
[6] S. Ardi, S. Fairus, and S. Sukmaningrum, “Design Control and Monitoring System for Boiler Wastewater Treatment Process Using Programmable Logic Controller and Hmi (Human Machine Interface),” Sinergi, vol. 24, no. 2, pp. 133, 2020.
[7] X. Zhu, W. Wang, L. Mu, and Q. Bi, “Theoretical analysis on response characteristics of mass flow in supercritical pressure circulating fluidized bed boiler,” Appl. Therm. Eng., vol. 87, pp. 286–296, 2015.
[8] K. G. Bilde, K. Sørensen, and T. Condra, “Mathematical model of natural circulation biomass boilers during       start-up,” Int. J. Heat Mass Transf., vol. 143, pp. 118477, 2019.
[9] M. A. Habib, H. E. Emara-Shabaik, I. Al-Zaharnah, and T. Ayinde ,“A thermal nonlinear dynamic model for water tube drumboilers,” International Journal of Energy Research,” vol.34.1,  pp.20-35, 2010.
[10] B. Hemalatha, D. A. . V. Juliet, and N. Natarajan, “Boiler Level Control using LabVIEW,” Int. J. Comput. Appl., vol. 1, no. 17, pp. 85–88, 2010.
[11] Sreepradha, Chandrasekharan, R. C. Panda, and N. S. Bhubaneswar, “Mathematical model for integrated coal fired thermal boiler using physical   laws,” Energy vol.118, pp. 985-998, 2017.
[12] A. F. Halihal, “Modeling and control of water level in boiler drum for nassiriyah thermal power plant,” Iran. J. Electr. Electron. Eng., vol. 15, no. 2, pp. 229–242, 2019.
[13] http://www.mech-engineeringbd.blogspot.com/2016/07/water-level-indicator.html.
[14] Iacob, Mihai, and G. D. Andreescu. “Drum-boiler control system employing shrink and swell effect remission in thermal power plants,” 2011 3rd International Congress on Ultra-Modern Telecommunications and Control Systems and Workshops (ICUMT),” IEEE, 2011. ‏
[15] M. A. Habib, Alzaharnah, I.  El-Shafei, M. Al-Anizi, S. Al-Awwad, M. Y., and M. Hajji, “Influence of Boiler Load Swing Rates on Response of Drum Water Level,” Journal of Energy Resources Technology, 135.2, 2013. ‏
[16] Savargave, S. Bhagwanrao, and M. J.  Lengare, “Modeling and optimizing boiler design using neural network and firefly algorithm,” Journal of Intelligent Systems 27.3, pp. 393-412, 2018.
[17] A. Kouadri, A. Namoun, and M. Zelmat, “Modelling the nonlinear dynamic behavior of a boiler‐turbine system using a radial basis function neural network,” International Journal of robust and nonlinear Control vol. 24, pp. 1873-1886, 2014. ‏
[18] Z. Wiesław, “Simulation of steam superheater operation under conditions of pressure                                                                         decrease,” Energy vol. 172, pp.  932-944, 2019. ‏
[19] M. A. Habib, H. E. Emara-Shabaik, I. Al-Zaharnah, and T. Ayinde, “A thermal nonlinear dynamic model for water tube drum boilers,” International Journal of Energy Research 34.1, pp. 20-35, ‏ 2010.
Engineering and Technology Journal
Volume 39, Issue 9
Mechanical Engineering
September 2021
Page 1376-1383
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