THERMAL SCIENCE

International Scientific Journal

External Links

ON-LINE MONITORING OF THE FOULING OF THE BOILER HEATING SURFACES

ABSTRACT
The designed system for the monitoring of the fouling of the furnace and super-heaters/reheaters, presented in the paper, will make it possible to operate the boiler with high efficiency. Measurements of temperatures, pressures, flows, and gas analysis data are used to perform heat transfer analysis in the boiler furnace and evaporator. Power boiler efficiency is calculated by an indirect method. The local and average degree of the combustion chamber slagging is determined in an "on-line" mode. In the case of superheaters, the fouling coefficient is determined for each superheater stage, due to big differences in ash-related fouling of individual stages. Fouling processes deteriorate the boiler capacity and efficiency and increase the rate of corrosion of the boiler heating surfaces. The energy consumption of flue gas fans rises as well because the accumulation of slag and ash involves higher pressure losses at individual superheater stages. In addition, examples of ash fouling of individual boiler heating surfaces are presented and discussed in the paper.
KEYWORDS
PAPER SUBMITTED: 2019-03-12
PAPER REVISED: 2019-04-13
PAPER ACCEPTED: 2019-05-12
PUBLISHED ONLINE: 2019-09-22
DOI REFERENCE: https://doi.org/10.2298/TSCI19S4289T
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2019, VOLUME 23, ISSUE Supplement 4, PAGES [S1289 - S1300]
REFERENCES
  1. Wessel, B., et al., Operational Experience Gained with Unit K at the Niederaußem Power Plant, VGB PowerTech, 11 (2006), pp. 47-51
  2. Taler, J., et al., An Assessment of Polish Power, Modern Power Systems, 27 (2007), 5, pp. 13-17
  3. Balting, U., et al., Plasma Coatings against Corrosion and Abrasion on Pipes and Panels at Coal-Fired Power Plants, Biomass and Waste Incinerating Plants, VGB PowerTech, 11 (2006), pp. 74-79
  4. Savat, P., Operational Experiences in Co-Firing Coal and Different Biomass, VGB PowerTech, (2006), 11, pp. 79-83
  5. Cerri, G et al., Optimization of Cleaning Timing and Load Allocation in Steam Generator Managment, Applied Thermal Engineering, 18 (1998), 3-4, pp. 763-775
  6. Taler, J., A Method of Determining Local Heat flux in Boiler Furnaces, Brennstoff-Wärme-Kraft (BWK), 42 (1990), 5, pp. 269-277
  7. Taler, J., Taler, D., Tabular Type Heat Flux Meter for Monitoring Internal Scale Deposits in Large Steam Boilers, Heat Transfer Engineering, 28 (2007), 3, pp. 230-239
  8. Taler, J., et al., Computer System for Monitoring Power Boiler Operation, Proceedings of the Institution of Mechanical Engineers, Part A: Journal of Power and Energy, 222 (2008), 1, pp. 13-24
  9. Neal, S. B. H. C., et al., The Measurement of Radiant Heat Flux in Large Boiler Furnances - II. Development of Flux Measuring Instruments, International Journal of Heat Mass Transfer, 23 (1980), 7, pp. 1023-1031
  10. Clyde, B., Slag Measurement Promises Better Sootblowing, Modern Power Systems, 24 (2004), 2, pp. 34-35
  11. Johnson, R., et al., Superheater Fouling Monitor System, Electric Power, 2004 (2004), Mar.-Apr., pp. 3-10
  12. Taler, D., et al., Numerical Simulation of Convective Superheaters in Steam Boilers, International Journal of Thermal Sciences, 129 (2018), Apr., pp. 320-333
  13. Raghavan, V., Combustion Technology. Essentials of Flames Burners, John Wiley and Sons Ltd., UK, 2016
  14. Ranade, V. V., Gupta, D. F., Computional Modeling of Pulverized Coal Fired Boilers, CRC Press, Taylor and Francis Group, Boca Raton, Fla., USA, 2015

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence