Migration and transformation characteristics of SO<sub>3</sub> in coal-fired power plants

LIU Xiaomin

doi:10.19666/j.rlfd.201912291

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Migration and transformation characteristics of SO₃ in coal-fired power plants

更新时间：2025-09-28

- Migration and transformation characteristics of SO₃ in coal-fired power plants
- Thermal Power Generation Vol. 49, Issue 6, Pages: 157-162(2020)
- 作者机构：
  
  厦门华夏国际电力发展有限公司
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.201912291
  CLC： TK314
- Published Online：24 May 2020，
  
  Published：2020
- 稿件说明：
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LIU Xiaomin. Migration and transformation characteristics of SO₃ in coal-fired power plants[J]. Thermal power generation, 2020, 49(6): 157-162.
DOI：

LIU Xiaomin. Migration and transformation characteristics of SO₃ in coal-fired power plants[J]. Thermal power generation, 2020, 49(6): 157-162. DOI： 10.19666/j.rlfd.201912291.

摘要

对某电厂300 MW机组在不同煤种、不同负荷条件下

选择性催化还原(SCR)脱硝系统、空气预热器、低低温电除尘器、海水脱硫以及湿式电除尘器等装置中SO_3迁徙转化特性进行了试验分析。试验结果表明:低低温电除尘器对SO_3的脱除效率可达65%;海水脱硫对SO_3的脱除效率约为15%;湿式电除尘器对烟气中SO_3脱除效率约为5%;烟气经过SCR脱硝装置后SO_3明显增加

这是造成尾部烟气中SO_3质量浓度升高的主要原因;经低低温电除尘器、海水脱硫装置以及湿式电除尘器对烟气中SO_3的协同脱除

能实现最终SO_3排放质量浓度低于2 mg/m~3。

Abstract

The migration and transformation characteristics of SO_3 in SCR denitration system

air preheater

ultra low temperature electrostatic precipitator

seawater desulfurization and wet electrostatic precipitator of a 300 MW unit in a power plant under conditions with different coal types and loads were studied experimentally.The experimental results showed that

the removal efficiency of ultra low temperature electrostatic precipitator on SO_3 could reach 65%.The removal efficiency of SO_3 through seawater desulfurization was about 15%.The SO_3 removal efficiency of the wet electrostatic precipitator was about 5%.The SO_3 concentration of flue gas increased significantly after passing through the SCR denitration device

which was the main reason for the increase of SO_3 concentration in the tail flue gas.In general

low temperature electrostatic precipitator

seawater desulfurization device and wet electrostatic precipitator all have high removal efficiency for SO_3 in flue gas

and can effectively control the final SO_3 emission mass concentration in flue gas to reach less than 2 mg/m~3.

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Migration and transformation characteristics of SO3 in coal-fired power plants

DOI：10.19666/j.rlfd.201912291

摘要

Abstract

关键词

Keywords

references

Migration and transformation characteristics of SO₃ in coal-fired power plants