Speed control mechanism of reaction between SO<sub>2</sub>/SO<sub>3</sub> and CaO

LIU Yong; ZHENG Chenghang; YANG Zhengda; QU Ruiyang; ZHANG Yongxin; WENG Weiguo; LIU Shaojun; GAO Xiang

doi:10.19666/j.rlfd.201802027

English

您当前的位置：

首页 >

文章列表页 >

Speed control mechanism of reaction between SO₂/SO₃ and CaO

Thermal Power Generation Vol. 47, Issue 11, Pages: 29-34(2018)

更新时间：2025-09-28

- Speed control mechanism of reaction between SO₂/SO₃ and CaO
- 作者机构：
  
  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.201802027
  CLC： X701.3
- Published Online：24 October 2018，
  
  Published：2018
- 稿件说明：
移动端阅览
LIU Yong, ZHENG Chenghang, YANG Zhengda, et al. Speed control mechanism of reaction between SO₂/SO₃ and CaO[J]. Thermal Power Generation, 2018, 47(11): 29-34.
DOI：

LIU Yong, ZHENG Chenghang, YANG Zhengda, et al. Speed control mechanism of reaction between SO₂/SO₃ and CaO[J]. Thermal Power Generation, 2018, 47(11): 29-34. DOI： 10.19666/j.rlfd.201802027.

摘要

碱基喷射是脱除燃煤烟气中SO_3的重要方法

烟气中的SO_2也可能与碱基反应

降低碱基吸收剂对SO_3的脱除效率。为了研究不同温度下SO_2、SO_3分别与CaO的反应速率以及反应的控制机制

本文设计了耐腐蚀性气氛的吸收反应装置

建立了反应速率控制模型

计算得到了关键的反应动力学参数。研究结果表明:温度为350、400、450℃时

反应20 min内

SO_3与CaO的平均反应速率分别为SO_2的3.2倍、4.2倍和4.0倍;CaO与SO_2反应时

反应速率的控制步骤为界面反应;CaO与SO_3反应时

反应速率的控制步骤为外扩散;提出从吸收剂侧减小外扩散阻力的SO_3强化脱除方法

如磨细吸收剂

将吸收剂溶解后雾化喷射

优化流场等;另外

适当降低反应温度可以减少SO_2对吸收剂的消耗。

Abstract

Alkaline sorbent injection is an important method to remove SO_3 from coal-fired flue gas

while SO_2 in the flue gas may also react with the alkaline sorbent

which reduces the SO_3 remove efficiency of alkaline sorbent. In order to study the reaction rate and mechanism of reaction between SO_2/SO_3 and CaO at different temperatures

a corrosion-atmosphere-resistant absorption reaction device was designed and a reaction rate control model was established. The key reaction kinetic parameters were calculated. The results show that

the average reaction rates of SO_3 and CaO are 3.2 times

4.2 times and 4.0 times of that of SO_2 respectively at 350 ℃

400 ℃ and 450 ℃within 20 min. When CaO reacts with SO_2

the control step of the reaction rate is interface reaction. When CaO reacts with SO_3

the control step of the reaction rate is external diffusion. On this basis

a method is proposed to improve the removal efficiency of SO_3 by alkaline sorbent injection

namely reducing the external diffusion resistance from the sorbent side

such as fine grinding of the sorbent

atomization spraying after the sorbent is dissolved

and optimization of the flow field. In addition

decreasing the reaction temperature appropriately can reduce the consumption of sorbent by SO_2.

关键词

Keywords

references

Views

197

下载量

CSCD

Alert me when the article has been cited

提交

Publicity Resources

CALCULATION AND MECHNISM ANALYSIS OF SNCR PROCESS PROMOTED BY ADDING CH₄

APPLICATION OF FLUE GAS AUTOMATIC CONTINUOUS EMISSION MONITORING SYSTEM

TEST STUDY ON EMISSION OF NO_x AND SO₂ FROM GASIFIED INCINERATION OF ORGANIC SOLID WASTES

INFLUENCE OF CaO UPON ASH MELTABILITY OF SHENHUA COAL

PREDICTION MODEL FOR POLLUTANTS SO₂ AND NO_x FROM LARGE-SCALE COAL-FIRED POWER PLANT BASED ON NEURAL NETWORK

Related Author

ZHANG Yanwen

CAI Ningshen

LI Zhenshan

DING Hui

KONG Fan-xin

FU Cong-wei

JIA Mei-qin

MA Yan

Related Institution

Tsinghua University

Huaju Energy Jidong Branch

Shenyang Institute of Aeronautics and Astronautics

Dalian University of Technology

Xi'an Thermal Power Research Institute Co., Ltd

AI问答

⁰

Speed control mechanism of reaction between SO2/SO3 and CaO

DOI：10.19666/j.rlfd.201802027

摘要

Abstract

关键词

Keywords

references

Speed control mechanism of reaction between SO₂/SO₃ and CaO