Cause analysis on abnormal displacement of high temperature reheat steam pipeline and the prevention research and application

CHEN Shengguang; WANG Junmin; DENG Linghui; SHI Weiwei; CHEN Dongming; LI Nanlin

doi:10.19666/j.rlfd.202112261

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Cause analysis on abnormal displacement of high temperature reheat steam pipeline and the prevention research and application

更新时间：2025-09-28

- Cause analysis on abnormal displacement of high temperature reheat steam pipeline and the prevention research and application
- Thermal Power Generation Vol. 51, Issue 5, Pages: 169-174(2022)
- 作者机构：
  
  1. 西安热工研究院有限公司
  2. 浙江浙能绍兴滨海热电有限责任公司
  3. 华能洛阳热电有限责任公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202112261
  CLC： TM621
- Published：2022
- 稿件说明：
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CHEN Shengguang, WANG Junmin, DENG Linghui, et al. Cause analysis on abnormal displacement of high temperature reheat steam pipeline and the prevention research and application[J]. Thermal power generation, 2022, 51(5): 169-174.
DOI：

CHEN Shengguang, WANG Junmin, DENG Linghui, et al. Cause analysis on abnormal displacement of high temperature reheat steam pipeline and the prevention research and application[J]. Thermal power generation, 2022, 51(5): 169-174. DOI： 10.19666/j.rlfd.202112261.

摘要

为掌握某超超临界1 000 MW机组投产后，高温再热蒸汽管道出现异常大位移且多组支吊架存在严重欠载、超载甚至压死等现象的原因，建立了涵盖恒力吊架实测性能指标的管道力学计算模型与评估方法，系统及定量地研究了高温再热蒸汽管道异常位移产生的原因。分析认为，高温再热蒸汽管道多弯多起伏布置、垂直方向刚性约束较少、连续布置恒力吊架数量较多及恒力吊架性能超标是产生异常位移的主要原因。实施分段约束控制及载荷补偿为主的防治措施后，高温再热蒸汽管道实测热位移值接近计算值，异常大位移得到了消除，管道及支吊架力学安全性得到了大幅提高。

Abstract

In order to find out the causes of abnormal large displacement of high temperature reheat steam pipe and serious underload

overload and even crushing of several groups of supports and hangers after an ultra-supercritical 1 000 MW unit was put into operation

the calculation model and evaluation method of pipeline mechanics covering the measured performance indexes of constant support hanger were established

and the causes of abnormal displacement of high temperature reheat steam pipeline were systematically and quantitatively studied. The analysis shows that

the main causes of the abnormal displacement are the multi-bend and multi-undulating arrangement of the high temperature reheat steam pipeline

less rigid constraints in the vertical direction

more continuous arrangement of the constant support hangers

and the performance of the constant support hangers exceeds the standard. After the prevention and control measures of sectional restraint con20trol and load compensation were implemented

the measured value of the thermal displacement of the high-temperature reheat steam pipe is close to the calculated value

the abnormal large displacement has been eliminated

and the mechanical safety of the pipeline and the supports and hangers has been greatly improved.

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