哈尔滨工业大学学报（英文版）2005，Vol.12Issue(6)：680-683,4.
Analog-experiment analysis of ash-deposition monitoring model of boiler economizers in power plants
Analog-experiment analysis of ash-deposition monitoring model of boiler economizers in power plants
CHENG Wei-liang 1XIA Guo-dong 2XU Shou-chen3
作者信息
- 1. Key Laboratory of Condition Monitoring and Control for Power Plant Equipment of Ministry of Education, North China Electric Power University, Beijing 102206, China
- 2. School of Environment and Energy Engineering,Beijing University of Technology, Beijing 100022, China
- 3. Advanced Training Center, State Grid, Beijing 100085, China
- 折叠
摘要
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 schedule 9 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.关键词
thermal power engineering/monitoring model/ash deposition/orthogonal experiment/boiler economizer/tube-shell exchangerKey words
thermal power engineering/monitoring model/ash deposition/orthogonal experiment/boiler economizer/tube-shell exchanger分类
能源科技引用本文复制引用
CHENG Wei-liang,XIA Guo-dong,XU Shou-chen..Analog-experiment analysis of ash-deposition monitoring model of boiler economizers in power plants[J].哈尔滨工业大学学报（英文版）,2005,12(6):680-683,4.
