发电技术 ›› 2022, Vol. 43 ›› Issue (1): 147-154.DOI: 10.12096/j.2096-4528.pgt.19115

• 发电及环境保护 • 上一篇    下一篇

低低温电除尘系统对SO3脱除性能研究

刘含笑, 郦建国, 姚宇平, 崔盈, 郭高飞, 何海涛, 刘美玲, 沈敏超   

  1. 浙江菲达环保科技股份有限公司,浙江省 诸暨市 311800
  • 收稿日期:2021-03-31 出版日期:2022-02-28 发布日期:2022-03-18
  • 作者简介:刘含笑(1987),男,硕士,工程师,主要从事电力环保技术研发工作,gutounan@163.com
  • 基金资助:
    国家重点研发计划项目(2016YFC0209107)

Study on SO3 Removal Performance of Low-low Temperature Electrostatic Precipitator System

Hanxiao LIU, Jianguo LI, Yuping YAO, Ying CUI, Gaofei GUO, Haitao HE, Meiling LIU, Minchao SHEN   

  1. Zhejiang Feida Environmental Science & Technology Co. , Ltd. , Zhuji 311800, Zhejiang Province, China
  • Received:2021-03-31 Published:2022-02-28 Online:2022-03-18
  • Supported by:
    National Key Research and Development Program of China(2016YFC0209107)

摘要:

为较全面表征低低温电除尘系统(FGC+ESP)对SO3减排特性,提出了一种低浓度SO3测试方法,即“2级控制冷凝+1级异丙醇吸收”采样法,可提高其测试数据的准确性。基于此,测定中试平台低低温电除尘系统(ESP入口90 ℃)的SO3脱除效率为96.15%。3个工程项目4组现场实测数据中,低低温电除尘系统对SO3脱除效率在69.1%~96.6%,分析并验证了低低温工况下飞灰颗粒对SO3的吸附、团聚机制。研究结果可为低低温电除尘技术的大规模推广应用及燃煤电厂SO3减排提供借鉴。

关键词: 燃煤电厂, 超低排放, 低低温电除尘系统, SO3测试方法, 脱除性能

Abstract:

In order to fully characterize the emission reduction performance of SO3 by low-low temperature electrostatic precipitator system (FGC+ESP), a method to test low-concentration SO3 was proposed, namely “two-stage controlled condensation + one-stage isopropanol absorption” sampling method, which can improve the accuracy of its test data. According to this method, in the pilot test, the SO3 removal efficiency of the low-low temperature electrostatic precipitator (LL-ESP) system (90 ℃ at ESP entrance) was 96.15%. In four groups of field measured data from three engineering projects, the SO3 removal efficiency of LL-ESP system was 69.1%-96.6%. The mechanism of SO3 adsorption and agglomeration by fly ash particles under low-low temperature conditions was verified. The study results can provide reference for the large-scale promotion and application of LL-ESP technology and SO3 emission reduction of coal-fired power plants.

Key words: coal-fired power plant, ultra-low emission, low-low temperature electrostatic precipitator system, SO3 test method, removal performance

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