超临界循环流化床（circulating fluidized bed, CFB）机组是否有必要配备紧急补给水系统在业内仍存在争议。为推动统一认识的形成，有必要在紧急补给水系统不投入使用的前提下，对全厂失电事故发生后超临界CFB锅炉各受热面的安全性开展相应的研究。但由于该事故发生率较低，目前仍未有相关数据报道。为给后续研究提供有力数据支持，本文介绍了一起发生在350 MW超临界循环流化床锅炉上的主给水泵故障事故，基于对事故发生后锅炉炉侧和水侧的物理过程的分析，总结和归纳了这一事故与全厂失电事故的异同。研究发现，在处理得当的情况下，主给水泵故障事故中采集的数据可用于验证全厂失电事故的预测模型。最后，本文建立了全厂失电事故的初步预测模型，为下但由于该事故发生率较低，目前仍未有相关数据报道。为给后续研究提供有力数据支持，本文介绍了一起发生在350 MW超临界循环流化床锅炉上的主给水泵故障事故，基于对事故发生后锅炉炉侧和水侧的物理过程的分析，总结和归纳了这一事故与全厂失电事故的异同。研究发现，在处理得当的情况下，主给水泵故障事故中采集的数据可用于验证全厂失电事故的预测模型。最后，本文建立了全厂失电事故的初步预测模型，为下一步工作的开展打下了良好基础。
DENG Boyu, ZHANG Man, WEI Guohua, LYU Junfu, YANG Hairui
. Analysis and Referential Significance of a Breakdown Accident of the Main Feed Water Pump in a 350 MW Supercritical CFB Boiler[J]. 热科学学报, 2023
, 32(5)
: 1797
-1806
.
DOI: 10.1007/s11630-023-1799-6
Controversies still exist over the necessity of equipping with an emergency water supply system in the supercritical circulating fluidized bed/CFB unit. To resolve the dispute, research on the safety of the heating surfaces in the supercritical CFB boiler during the electricity failure accident under the assumption of not putting the emergency water supply system into use must be conducted. However, due to the low incidence rate of this accident, no relevant data have been reported yet. To provide useful data for the related research, a breakdown accident of the main feed water pump that happened in a 350 MW supercritical CFB boiler was introduced in this work. The analysis of the physical processes in both the furnace and water side of the boiler during this accident was performed. Then the discussion on the similarities and discrepancies between the two accidents was carried out. It was found out that with appropriate handling, the data collected in two periods of the breakdown accident of the main feed water pump can provide a reference for the verification of the prediction model of the electricity failure accident. Finally, a preliminary prediction model was established as the first step of the verification work.
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