Development and Application of On-line Monitoring System for Falling-off Oxides of Supercritical Boilers

doi:10.12096/j.2096-4528.pgt.18257

Abstract

Abstract:

In order to realize the life cycle monitoring of exfoliated oxide, a real-time on-line monitoring system for exfoliated oxide of supercritical boilers was developed. The monitoring system installs measuring probes at the outlet of superheater and reheater. By using the impact vibration wave measurement technology, the mass content, particle size distribution and particle flow of exfoliated oxide particles can be directly measured online, real-time and continuously, and the flow of exfoliated oxide in steam pipeline can be effectively monitored. The system is applied in supercritical generating units. By analyzing particle characteristics data, and the variation trend of solid particle concentration with time and load in steam pipeline, the severity of oxide shedding is monitored, and the operation control is evaluated. The purpose of reducing oxide shedding and preventing solid particle erosion is realized. At the same time, the system is used to monitor the quality of steam impurities during the start-up and operation of the unit, and to study the flow of iron in the steam-water cycle of the unit.

Key words: supercritical boilers, exfoliated oxide, life cycle, on-line monitoring, characteristic data

CLC Number:

TK227

Xiuqiang CUI. Development and Application of On-line Monitoring System for Falling-off Oxides of Supercritical Boilers[J]. Power Generation Technology, 2020, 41(4): 385-390.

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