Resistance in hot secondary air duct in a 1000MW unit boiler manufactured in Dongfang Boiler Group

CHEN Nianzhe; ZHU Quanli; HU Guoming; ZHONG Yi; JIA Yan

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Resistance in hot secondary air duct in a 1000MW unit boiler manufactured in Dongfang Boiler Group

Thermal Power Generation Vol. 46, Issue 1, Pages: 36-41(2017)

更新时间：2025-09-28

- Resistance in hot secondary air duct in a 1000MW unit boiler manufactured in Dongfang Boiler Group
- 作者机构：
  
  1. 武汉大学动力与机械学院
  2. 中南电力设计院
- 作者简介：
- 基金信息：
- DOI：
  CLC： TM621.2
- Published：2017
- 稿件说明：
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CHEN Nianzhe, ZHU Quanli, HU Guoming, et al. Resistance in hot secondary air duct in a 1000MW unit boiler manufactured in Dongfang Boiler Group[J]. Thermal Power Generation, 2017, 46(1): 36-41.
DOI：

CHEN Nianzhe, ZHU Quanli, HU Guoming, et al. Resistance in hot secondary air duct in a 1000MW unit boiler manufactured in Dongfang Boiler Group[J]. Thermal Power Generation, 2017, 46(1): 36-41. DOI：

摘要

应用Fluent软件对某1 000MW机组锅炉热二次风管道系统的阻力进行了研究

认为空气预热器出口90°弯头、水平过渡段、前后墙分配处以及前后墙各支管分配处速度分布不均匀等是造成原热二次风风道阻力较大的主要原因。对此

采取流线型热二次风风道、合理的弯头、增设导流板以及局部圆角等改进方案

解决了原设计方案存在的速度分布不均匀和回流区等问题

降低了热二次风管道的阻力。

Abstract

By using Fluent software

the resistance in hot secondary air duct of a 1 000 MW unit boiler manufactured in Dongfang Boiler Group was numerically studied.Several factors

such as the 90°elbow at the preheater outlet

the horizontal transition segment

the uneven velocity distribution around the front and back wall and the branches

were considered as the major reasons for the large resistance in the original hot secondary air duct.Against this problem

a series of detailed improvement measures were put forward

like applying streamline design for the hot secondary air duct

selecting appropriate elbow

adding guide plate and using fillet angle at local place.After the above measurement were taken

the uneven velocity distribution and reflow problems were solved

and the resistance in the hot secondary air duct was decreased.

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