Analysis of sulfates deposition on induced draft fan blade in a coal-fired power plant with ultra-low emission

WANG Yibin; TAN Houzhang; XIAO Jiafan; DONG Kun; ZHANG Junjie

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Analysis of sulfates deposition on induced draft fan blade in a coal-fired power plant with ultra-low emission

Thermal Power Generation Issue 11, (2016)

更新时间：2025-09-28

- Analysis of sulfates deposition on induced draft fan blade in a coal-fired power plant with ultra-low emission
- 作者机构：
  
  1. 西安交通大学能源与动力工程学院,陕西,西安,710049
  2. 神华集团国华(北京)电力研究有限公司,北京,100052
- 作者简介：
- 基金信息：
- DOI：
  CLC： TK05;X773
- Published Online：24 November 2016，
  
  Published：2016
- 稿件说明：
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WANG Yibin, TAN Houzhang, XIAO Jiafan, et al. Analysis of sulfates deposition on induced draft fan blade in a coal-fired power plant with ultra-low emission[J]. Thermal Power Generation, 2016, (11).
DOI：

WANG Yibin, TAN Houzhang, XIAO Jiafan, et al. Analysis of sulfates deposition on induced draft fan blade in a coal-fired power plant with ultra-low emission[J]. Thermal Power Generation, 2016, (11). DOI：

摘要

针对燃煤电厂采用选择性催化还原(SCR)技术及低低温电除尘技术实现污染物超低排放

使得低温省煤器后烟气温度过低

引起引风机叶片表面硫酸盐沉积

严重影响引风机出力和锅炉带负荷等问题，本文以某污染物超低排放燃煤电厂引风机叶片表面厚达10 mm的结垢样品为研究对象

详细分析了结垢灰样的元素、矿物构成与微观形貌。结果表明:引风机叶片表面灰样主要由硫酸钙、二水合硫酸钙、铵明矾(十二水硫酸铝铵)、硫酸铵和二氧化硅等结晶矿物质组成；灰样中氮、氢和硫元素质量分数高达22%

样品灼烧质量损失可达到60%以上；含硅铝元素球形颗粒完全被絮状硫酸盐裹覆；SCR脱硝系统出口氨逃逸量较高与低温省煤器后烟温过低是造成引风机叶片表面硫酸盐沉积的主要原因。建议应根据不同燃用煤种

结合氨逃逸水平、烟气含湿量、灰浓度等因素，进行低温省煤器出口温度设计。

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