中国电力 ›› 2015, Vol. 48 ›› Issue (7): 120-114.DOI: 10.11930.2015.7.120

• 技术经济 • 上一篇    下一篇

某电厂烟气监测系统与脱硝自动控制改造

王奇伟   

  1. 浙江大唐乌沙山发电有限责任公司,浙江 宁波 315722
  • 收稿日期:2015-04-02 出版日期:2015-07-25 发布日期:2015-11-26
  • 作者简介:王奇伟(1986—),男,浙江台州人,助理工程师,从事电厂热工自动化及环保维护工作。E-mail: 516428335@qq.com

Retrofit of Flue Gas Monitoring and Denitration Automatic Control Systems in a Power Plant

WANG Qiwei   

  1. Zhejiang Datang Wushashan Power Generation Co., Ltd., Ningbo 315722, China
  • Received:2015-04-02 Online:2015-07-25 Published:2015-11-26

摘要: 以某电厂600 MW国产超临界机组为例,对机组脱硫、脱硝设施烟气连续监测系统常见故障进行分析,提出和采取措施后,提高了SO2、NOx、烟尘、烟气流量测量的准确性;针对脱硝反应器出口截面NOx质量浓度不均匀现象,进行了计算机数值模拟,优化了设计方案,在此基础上对喷氨控制系统进行改造,使脱硝效率得以提高,氨逃逸率得到控制。

关键词: 燃煤电厂, 烟气连续监测, 烟气脱硝, 烟尘, SO2, NOx

Abstract: Taking the 600 MW domestically-made supercritical unit of a power plant as an example, the common existing faults in the continuous monitoring system for the desulfurization and denitriation equipments is analyzed and the corresponding preventive measures are put forward. The implementation of these preventive measures has effectively improved the accuracy of SO2, NOx, gas dust and gas flow measurement. In addition, the numerical simulation is carried out on the unevenness of the exit sectional NOx concentration during the denitration process to optimize the original design. Based on the simulation result, the ammonia injection control system is modified such that, the denitration efficiency is improved and the NH3 escape rate is now under control.

Key words: coal-fired power plant, gas continuous emission monitoring, gas denitration, gas dust, SO2, NOx

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