国电恒泰电厂300MW锅炉贫—烟混煤双尺度低NOx燃烧

发布时间：2018-05-26 13:27

本文选题：低氮燃烧 + 混煤　；参考：《重庆大学》2014年硕士论文

【摘要】：随着我国综合实力的增强，人民生活水平的提高，社会高度关注环境问题，火电等敏感领域对环境影响较大，《火电厂大气污染物排放标准》已经三次修订，排放标准更加严格，在运火电机组必须开展低NOx、脱硝改造。本文用“双尺度”低氮燃烧技术对国电恒泰电厂锅炉机组开展低氮燃烧研究和改造。国电恒泰电厂实际燃用煤种、煤质与设计煤质发生了较大变化，锅炉NOx排放超过环保排放标准数倍，，采用先低氮燃烧再烟气脱硝的技术改造路线，实现NOx达标排放。在总结国内外低氮燃烧技术成果的基础上，针对锅炉设备和燃用混煤的特殊性，采用贫煤、烟煤分层燃烧方式，进行了两次试验改造，在总结分析试验改造结果的基础上，进一步优化空间尺度和过程尺度，使用保证低氮燃烧、锅炉效率和安全运行的技术，开展了燃烧优化试验。实施低氮改造后，锅炉NOx排放由700mg/Nm3左右降至400mg/Nm3以下，实现了在复杂煤种、煤质下低氮燃烧技术改造目标，未产生影响锅炉安全经济运行的其他问题，通过对贫煤、烟煤混煤低氮燃烧的研究和改造，“双尺度”低氮燃烧技术的成功应用可以为其他同类型锅炉机组改造提供借鉴。
[Abstract]:With the enhancement of our country's comprehensive strength and the improvement of people's living standards, the society is highly concerned about environmental problems, and the sensitive fields such as thermal power plants have a great impact on the environment. The Emission Standards for Atmospheric pollutants from Thermal Power plants have been revised three times, and the emission standards have become more stringent. The transformation of low no _ x and denitrification must be carried out in thermal power units. In this paper, the low nitrogen combustion of the boiler unit of Hengtai Power Plant is studied and reformed by using "double scale" low nitrogen combustion technology. The actual burning of coal in Hengtai power plant of Guodian has changed greatly the quality of coal and design coal has changed greatly. The NOx emission of boiler is several times higher than the standard of environmental protection. The technical retrofit route of low nitrogen combustion and flue gas denitrification is adopted to realize the discharge standard of NOx. On the basis of summing up the technical achievements of low nitrogen combustion at home and abroad, according to the particularity of boiler equipment and mixed coal burning, the lean coal and bituminous coal stratified combustion methods are adopted to carry out two test revamping, and on the basis of summing up and analyzing the results of test transformation, Further optimization of space scale and process scale was carried out using the technology of ensuring low nitrogen combustion boiler efficiency and safe operation. After the low nitrogen revamping, the NOx emission of boiler is reduced from 700mg/Nm3 to 400mg/Nm3, which realizes the goal of low nitrogen combustion technology reform under complex coal and coal quality, and does not produce other problems that affect the safe and economical operation of boiler. Through the research and transformation of low nitrogen combustion of lean coal and bituminous coal, the successful application of "double scale" low nitrogen combustion technology can be used as a reference for other boiler units of the same type.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM621.2

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