Experiment on removal performance of SO<sub>3</sub> from coal-fired flue gas using typical base-type absorbents

李泽华; 周俊波; 郭彦君; 王睿东; 李晓宇; 张鑫; 李新奥; 卿梦霞

doi:10.19666/j.rlfd.202411253

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Experiment on removal performance of SO₃ from coal-fired flue gas using typical base-type absorbents

Thermal Power Generation Vol. 54, Issue 9, Pages: 154-163(2025)

更新时间：2026-08-11

- Experiment on removal performance of SO₃ from coal-fired flue gas using typical base-type absorbents
- 作者机构：
  
  1. 国家电投集团内蒙古白音华煤电有限公司坑口发电分公司
  2. 西安热工研究院有限公司
  3. 长沙理工大学能源与动力工程学院
- 作者简介：
- 基金信息：
- DOI：10.19666/j.rlfd.202411253
  CLC： X773
- Published：2025
- 稿件说明：
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[1]李泽华,周俊波,郭彦君,等.典型碱基吸收剂对燃煤烟气中SO_3的脱除性能实验[J],2025,54(09):154-163.
[1]李泽华,周俊波,郭彦君,等.典型碱基吸收剂对燃煤烟气中SO_3的脱除性能实验[J],2025,54(09):154-163. DOI： 10.19666/j.rlfd.202411253.

DOI：10.19666/j.rlfd.202411253.

摘要

燃煤烟气中SO

的生成与排放严重威胁着电厂的安全经济运行与大气环境。为此研究了钠基、钙基与镁基吸收剂对SO

脱除性能，以及Na_2CO

、Ca(OH)

与CaO 3种碱基吸收剂在不同运行工况下的SO

脱除性能变化。结果表明：在SO

与SO

共存的条件下，吸收剂均会优先与烟气中的SO

发生反应，各种吸收剂对SO

的脱除效果从高到低顺序为Na_2CO

NaHCO

Mg(OH)

MgOCa(OH)

CaO；在一定实验条件下，当吸收剂与SO

化学当量比达2:1后，所有吸收剂对SO

的脱除效率均可达80%以上；对NaHCO

、Ca(OH)

、CaO 3种吸收剂进行煅烧预处理后，其对SO

的脱除率略有提高；反应温度、化学当量比和SO

初始质量浓度等参数的增加均有利于吸收剂对SO

的脱除，而在适当范围内提高H_2O体积分数有利于吸收剂对SO

的脱除；吸收剂显著过量时，外扩散是影响化学反应速率的主要控制步骤，而吸收剂类型对其影响较小。

Abstract

The formation and emission of SO

in coal-fired flue gas pose serious threats to both the safe and economical operation of power plants and the atmospheric environment. To solve this problem

the SO

removal performance of sodium-based

calcium-based and magnesium-based absorbents is investigated

and the pe

rformance variations of Na_2CO

Ca(OH)

and CaO under different operating conditions are studied. The results indicate that

under the coexistence of SO

and SO

the absorbers would react with SO

in the flue gas preferentially

and the effectiveness of SO

removal by various absorbents ranked from highest to lowest is as follows: Na_2CO

NaHCO

Mg(OH)

MgOCa(OH)

CaO. Under certain experimental conditions

the SO

removal efficiencies of all the absorbents could reach higher than 80% when the chemical equivalent ratio of absorbent to SO

reached 2:1. Pre-calcination treatment for the absorbents enhanced their pore structures

facilitating SO

diffusion into the absorbent and improving the SO

absorption efficiency. Increasing reaction temperature

chemical equivalent ratio

and initial SO

mass concentration can promote the SO

removal.Additionally

a moderate increase in H_2O volume fraction aided SO

removal. When the absorbent is significantly excessive

external diffusion is the main controlling step affecting the chemical reaction rate

while the type of absorbent has a relatively minor impact on it.

关键词

Keywords

references

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Experiment on removal performance of SO3 from coal-fired flue gas using typical base-type absorbents

DOI：10.19666/j.rlfd.202411253

摘要

Abstract

关键词

Keywords

references

Experiment on removal performance of SO₃ from coal-fired flue gas using typical base-type absorbents