SIMULATION AND ANALYSIS ABOUT WORN-OUT ON CONNECTING PIPE OF LOW-PRESSURE REHEATER FOR A BOILER OF 600 MW UNIT

LI Xiang-peng1; GAO Zeng-liang1; CHEN Jiang1; ZHOU Hao2; CEN Ke-fa21.College of Mechanical and Electrical Engineering

doi:10.19666/j.rlfd.2009.02.015

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SIMULATION AND ANALYSIS ABOUT WORN-OUT ON CONNECTING PIPE OF LOW-PRESSURE REHEATER FOR A BOILER OF 600 MW UNIT

更新时间：2025-09-28

- SIMULATION AND ANALYSIS ABOUT WORN-OUT ON CONNECTING PIPE OF LOW-PRESSURE REHEATER FOR A BOILER OF 600 MW UNIT
- Thermal Power Generation Vol. 38, Issue 2, Pages: 54-58(2009)
- 作者机构：
  
  1. 浙江工业大学机电工程学院
  2. 浙江大学能源清洁利用国家重点实验室
  3. 浙江工业大学机电工程学院
  4. 浙江大学能源清洁利用国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.2009.02.015
  CLC： TK223.3
- Published：2009
- 稿件说明：
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LI Xiang-peng1, GAO Zeng-liang1, CHEN Jiang1, et al. SIMULATION AND ANALYSIS ABOUT WORN-OUT ON CONNECTING PIPE OF LOW-PRESSURE REHEATER FOR A BOILER OF 600 MW UNIT[J]. Thermal power generation, 2009, 38(2): 54-58.
DOI：

LI Xiang-peng1, GAO Zeng-liang1, CHEN Jiang1, et al. SIMULATION AND ANALYSIS ABOUT WORN-OUT ON CONNECTING PIPE OF LOW-PRESSURE REHEATER FOR A BOILER OF 600 MW UNIT[J]. Thermal power generation, 2009, 38(2): 54-58. DOI： 10.19666/j.rlfd.2009.02.015.

摘要

采用三维模型对600 MW机组锅炉烟道气相流场分布、飞灰运动和浓度分布等对炉膛出口附近低温再热器连接管束的磨损进行了模拟分析。结果表明

受烟道气固两相流分布的影响

在炉膛出口处烟气具有较大的速度、颗粒浓度和颗粒平均碰撞速度

从而使低温再热器连接管磨损速率较大。对此

建议在第1排连接管底部和连接管之间的水平低温再热器I管束迎风面安装6 mm厚的防磨瓦

在其余部位安装3 mm厚的防磨瓦

以改善磨损。

Abstract

By adopting three-dimentional model

the simulation and analysis of worn-out on connecting pipe bundle of low-pressure reheater nearby the furnace outlet suffured from gas-phase flow field distribustion

movement of flyash

and concentration distribution etc.in the flue duct of boiler concerning 600 MW unit have been carried out.Results show that the flue gas velocity

particle's concentration and average collision velocity of particles nearby the furnace outlet all are larger due to influence of solid-gas two-phase flow distribution in the flue duct

thereby

the velocity of wornout on connecting pipes of the low-pressure reheater is also larger.It is recommended to install wornout-resistant covers of 6 mm thickness onto the windward surface of horizontal I-shaped pipe bundle of the low-pressure reheater between bottom of the first row connecting pipe and the other connecting pipes

as well as installing wornout-resitant covers with 3 mm thickness onto the other remained parts.

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