Analysis of Wall Temperature Characteristics of the Panel Superheater in a 600MW Supercritical Circulating Fluidized Bed Boiler

DOI

10.2991/978-94-6463-780-9_42How to use a DOI?

Keywords

SCCFB boiler; panel superheater; theoretical calculations; tube panel over-temperature

Abstract

To address the overheating issue in the panel superheater during the operation of a 600MW supercritical circulating fluidized bed boiler, this paper establishes a heat transfer characteristics calculation model for the panel superheater. By integrating actual operational data from the boiler, we calculated the pipe wall temperatures and the mass flow rates of the working medium inside the pipes under three typical operating conditions, and analyzed the heat transfer characteristics of the panel superheater. The theoretical calculations reveal that under identical load conditions, when the thermal deviation is greater, the heat load increases, leading to higher heat absorption by the pipes and consequently larger mass flow rates of the working medium inside the pipes. There is a positive correlation between heat load and the mass flow rate of the working medium. Under the three different loads, the maximum mass flow rates are 0.356 kg/s, 0.533 kg/s, and 0.721 kg/s, while the minimum mass flow rates are 0.149 kg/s, 0.211 kg/s, and 0.261 kg/s, respectively. Under all three operating conditions, the maximum wall temperature of the pipe screen consistently occurs at the penetration point between the panel superheater and the water-cooled wall of the furnace top, specifically on the fin of the 50th pipe. The highest temperatures recorded are 637.76 ℃ at 60% load, 649.52℃ at 80% load, and 652.96 ℃ at 100% load. Notably, at 100% load, the maximum temperature exceeds the allowable steel temperature by 2.96 ℃, resulting in localized overheating and posing a threat to the safe operation of the boiler.

Copyright

© 2025 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Nenghong Zheng
AU  - Ye Chen
AU  - Jun Li
AU  - Tao Liu
PY  - 2025
DA  - 2025/07/03
TI  - Analysis of Wall Temperature Characteristics of the Panel Superheater in a 600MW Supercritical Circulating Fluidized Bed Boiler
BT  - Proceedings of the 2025 International Conference on Engineering Management and Safety Engineering (EMSE 2025)
PB  - Atlantis Press
SP  - 464
EP  - 476
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-780-9_42
DO  - 10.2991/978-94-6463-780-9_42
ID  - Zheng2025
ER  -