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Author:

Cheng, Wei-Liang (Cheng, Wei-Liang.) | Xia, Guo-Dong (Xia, Guo-Dong.) (Scholars:夏国栋) | Xu, Shou-Chen (Xu, Shou-Chen.)

Indexed by:

EI Scopus

Abstract:

Ash deposition is a form of particulate fouling, and appears usually in boiler economizers. The ash deposition increases capital expenditure, energy input and maintenance costs. An analog experiment for monitoring ash deposition was performed from the analogous objective of a 410 t/h boiler economizer to verify the rationality and reliability of the ash-deposition-monitoring model presented in order to increase the security and economy in economizer running. The analog experiment platform is a tube-shell exchanger that conforms well to the conditions of a self-modeling area. The analog flue gas in the shell side is the heated air mixed with ash, and in the tube side the fluid is water heated by the flue gas. The fluid state in the water side and the flue gas side follows the second self-modeling area. A 4-factor-3 level orthogonal table was used to scheduled operation conditions of orthogonal experiment, with the 4 factors being heat power, flue gas velocity, ashes grain diameter and adding ashes quantity while the three levels are different values due to different position classes in every factor. The ash deposition thermal resistances is calculated by the model with the measure parameters of temperature and pressure drop. It shows that the values of the ash deposition thermal resistances gradually increase up to a stable state. And the experimental results are reliable by F testing method at α=0.001. Therefore, the model can be applied in online monitoring of ash deposition in a boiler economizers in power plants and provides scientific decision on ash deposition prediction and sootblowing.

Keyword:

Power plants Boilers Mathematical models Pressure drop Reliability Monitoring Economizers

Author Community:

  • [ 1 ] [Cheng, Wei-Liang]Key Laboratory of Condition Monitoring and Control for Power Plant Equipment, North China Electric Power University, Beijing 102206, China
  • [ 2 ] [Xia, Guo-Dong]School of Environment and Energy Engineering, Beijing University of Technology, Beijing 100022, China
  • [ 3 ] [Xu, Shou-Chen]Advanced Training Center, State Grid, Beijing 100085, China

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Source :

Journal of Harbin Institute of Technology (New Series)

ISSN: 1005-9113

Year: 2005

Issue: 6

Volume: 12

Page: 680-683

Cited Count:

WoS CC Cited Count: 0

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 10

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