中国电力 ›› 2016, Vol. 49 ›› Issue (7): 151-156.DOI: 10.11930/j.issn.1004-9649.2016.07.151.06

• 节能与环保 • 上一篇    下一篇

低低温电除尘器设计烟温的理论计算及存在问题

沈艳梅1, 董琨2, 崔智勇2, 魏书洲3   

  1. 1. 中国神华能源股份有限公司国华电力分公司,北京 100025;
    2. 神华国华(北京)电力研究院有限公司,北京 100025;
    3. 神华国华三河发电有限责任公司,河北 三河 065201
  • 收稿日期:2016-01-12 出版日期:2016-07-20 发布日期:2016-07-28
  • 作者简介:沈艳梅(1987—),女,山东宁阳人,博士,工程师,从事火电厂大气污染控制领域研究工作。E-mail: potatosym@163.com

The Theoretical Calculation of Designed Temperature of Flue Gas in Low-Low Temperature Electrostatic Precipitator and the Existing Problems

SHEN Yanmei1, DONG Kun2, CUI Zhiyong2, WEI Shuzhou3   

  1. 1. China Shenhua Energy Co., Ltd., Guohua Electric Power Branch, Beijing 100025, China;
    2. Shenhua Guohua (Beijing) Electric Power Research Institute Co., Ltd., Beijing 100025, China;
    3. Sanhe Power Generation Co., Ltd., Sanhe 065201, China
  • Received:2016-01-12 Online:2016-07-20 Published:2016-07-28

摘要: 与常规电除尘器相比,低低温电除尘器在节能和环保方面有一定优势。对其实际运行案例进行汇总,并分析了国内外低低温电除尘器的设计烟温差异。酸露点的正确估算对低低温电除尘器烟温设计至关重要,以某电厂600 MW低硫煤燃煤机组为研究对象,采用3种广泛使用的酸露点计算方法,对烟气酸露点温度进行预测,并分析了各方法所得结果的准确性及可能存在的问题。同时,通过计算烟气中粉煤灰与SO3质量浓度之比,评价该电厂采用低低温电除尘技术后的设备腐蚀隐患,分析低低温电除尘技术的可用性。对低低温电除尘器入口烟温设计范围提出建议,并分析低低温电除尘器入口烟温长期高于酸露点温度运行的弊端。

关键词: 燃煤电厂, 低低温电除尘器, 酸露点, 烟温计算

Abstract: Compared with the traditional electrostatic precipitator, the low-low temperature electrostatic precipitator(LLT-ESP) has some advantages in the aspects of energy conservation and environmental protection. This paper conducts a study on the practical application cases of LLT-ESP both at home and abroad, analyzing the differences of their designed flue gas temperatures. The conclusion is that the correct estimate of the gas acid dew-point is crucial for the temperature designing of LLT-ESP. Taking a typical 600-MW coal-fired power plant for example, three widely-used methods are adopted to calculate the acid dew-point with the corresponding accuracy and possible problems being analyzed. In addition, the D/S ratio is calculated to evaluate the device corrosion potential and the feasibility of LLT-ESP. At the end, suggestions on the temperature design of LLT-ESP are proposed, and the possible problems in the LLT-ESP operation when the flue gas temperature being long-term higher than the acid dew point. are analyzed.

Key words: coal-fired power plant, low-low temperature electrostatic precipitator, acid dew-point, flue gas temperature calculation

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