Calculation and Analysis for the Safety of High-temperature Heating Surface of a 700 MW Ultra-supercritical CFB Boiler Without an External Bed After Plant Operation Total Power Failure

WANG Aoyu; LU Jiayi; ZHOU Xu; DENG Qigang; Lü Zhuo; SHI You; YANG Dong

doi:10.19805/j.cnki.jcspe.2025.240532

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Calculation and Analysis for the Safety of High-temperature Heating Surface of a 700 MW Ultra-supercritical CFB Boiler Without an External Bed After Plant Operation Total Power Failure

更新时间：2026-10-10

- Calculation and Analysis for the Safety of High-temperature Heating Surface of a 700 MW Ultra-supercritical CFB Boiler Without an External Bed After Plant Operation Total Power Failure
- Chinese Journal of Power Engineering Vol. 45, Issue 11, Pages: 1767-1776(2025)
- 作者机构：
  
  1. 动力工程多相流国家重点实验室(西安交通大学),陕西,西安,710049
  2. 清洁燃烧与烟气净化四川省重点实验室,四川,成都,611731
  3. 东方电气集团东方锅炉股份有限公司,四川,自贡,643001
- 作者简介：
- 基金信息：
- DOI：10.19805/j.cnki.jcspe.2025.240532
  CLC：
- Online First：17 November 2025，
  
  Published：17 November 2025
- 稿件说明：
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王奥宇,鲁佳易,周旭,邓启刚,吕卓,石友,杨冬. 全厂失电后不带外置床的700 MW超超临界CFB锅炉高温受热面安全性计算分析动力工程学报, 2025, 45(11): 1767-1776 https://doi.

org/10.19805/j.cnki.jcspe.2025.240532
王奥宇,鲁佳易,周旭,邓启刚,吕卓,石友,杨冬. 全厂失电后不带外置床的700 MW超超临界CFB锅炉高温受热面安全性计算分析动力工程学报, 2025, 45(11): 1767-1776 https://doi. DOI： 10.19805/j.cnki.jcspe.2025.240532.

org/10.19805/j.cnki.jcspe.2025.240532 DOI：

摘要

以某不带外置床的700 MW超超临界循环流化床(circulating fluidized bed

CFB)锅炉为研究对象

分析计算了炉膛内及尾部烟道各处受热面的温度变化规律。建立了失电事故发生后锅炉受热面内的流动传热计算模型

同时优化了各受热面的热负荷计算模型

并且在此基础上开发了失电事故发生后锅炉受热面瞬态传热的计算程序。通过计算分析

得到了失电事故发生后各受热面内工质温度和管壁温度等热力参数的变化规律;在不配备紧急补水泵的情况下

仅高温再热器受热面出现短暂超温现象

并且超温幅度小、超温时间短

不会引起受热面的安全问题;考虑紧急补水泵建设成本较高和综合经济性评价

该CFB锅炉无需配备紧急补水泵。

Abstract

Taking a 700 MW ultra-supercritical circulating fluidized bed (CFB) boiler without an external fluidized bed as the research object

the temperature variations across heating surfaces in the furnace and the rear flue gas pass were analyzed and calculated. A flow and heat transfer model for heating surfaces after a power failure accident was established

while the heat load calculation model for each heating surface was optimized. Based on above researches

a computational program for transient heat transfer in heating surfaces of boiler after a power failure accident was developed. Through computational analysis

the variations of thermal parameters such as working fluid temperature and tube wall temperature in each heating surface after power failure

were obtained. Without an emergency supplementing water water pump

only the high-temperature reheater experienced a transient overtemperature

while the overtemperature exhibited a minimal magnitude and a short duration

posing no safety risks to heating surfaces. Considering the high construction costs of emergency supplementing water pump and comprehensive economic evaluations

this CFB boiler does not require an installation of emergency supplementing water pump.

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references

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