云南火电厂烟气污染物排放现状及控制对策研究

发布时间：2018-04-19 23:12

本文选题：火电厂 + 烟气污染物　；参考：《华北电力大学》2015年硕士论文

【摘要】：经济增长带来的能源消耗使得火电厂排放了越来越多的烟气污染物,国家对环保的重视,为了更好的控制大气污染、改善大气质量,出台了更为严格的大气污染物排放标准GB13223-2011。本文对云南省火电厂烟气污染物排放进行了调查和研究,概述了云南省火电厂环保设备安装及运行情况和烟气污染物排放现状,简要总结云南省火电厂脱硫、脱硝、除尘系统存在的问题,主要集中在环保设备实际运行情况偏离了设计工况、设备故障率高使得运行不稳定,燃用煤质成分波动较大等,从而影响了烟气污染物控制效果。对不满足规定排放限值的环保系统提出了改进措施和建议,除常规技术改造措施外,还需对运行调节、配煤控制等手段进行优化,以满足GB13223-2011规定的烟气排放限值。由于循环流化床(CFB)机组在云南电网调峰的重要性,其烟气污染物排放特性的研究显得格外重要,通过试验改变石灰石量、床温、氧量等因素,得到锅炉不同工况下SO2、NOx及N20的排放特性,从生成机理角度分析了不同参数之间的影响关系,得出了满足国家排放标准要求前提下的最佳的运行工况。通过本文的分析研究,对云南省火电厂乃至国内同类型机组的环保系统设计、设备稳定运行,控制烟气污染物排放满足规定标准起到积极的借鉴意义,还可带来可观的社会效益和环境效益。
[Abstract]:The energy consumption brought by the economic growth makes the thermal power plant discharge more and more flue gas pollutants. In order to better control the air pollution and improve the air quality, the state pays more attention to the environmental protection. In order to better control the air pollution and improve the air quality, a more stringent emission standard GB13223-2011 has been issued. In this paper, the emission of flue gas pollutants from thermal power plants in Yunnan Province is investigated and studied. The installation and operation of environmental protection equipment and the current situation of emission of flue gas pollutants in thermal power plants in Yunnan Province are summarized, and the desulfurization and denitrification of thermal power plants in Yunnan Province are summarized briefly. The problems in the dust removal system mainly focus on the deviation of the actual operation of the environmental protection equipment from the design conditions. The high failure rate of the equipment makes the operation unstable and the coal composition fluctuates greatly, which affects the control effect of the flue gas pollutants. The improvement measures and suggestions are put forward for the environmental protection system which does not meet the prescribed emission limit. In addition to the conventional technical renovation measures, it is also necessary to optimize the operation regulation, coal blending control and other means to meet the flue gas emission limit stipulated by GB13223-2011. Because of the importance of circulating fluidized bed (CFB) units in peak shaving in Yunnan Power Grid, the study of emission characteristics of flue gas pollutants is particularly important. The factors such as limestone content, bed temperature, oxygen content and so on are changed through experiments. The emission characteristics of so _ 2 no _ x and N _ 20 under different operating conditions are obtained. The influence relations between different parameters are analyzed from the point of view of formation mechanism, and the optimal operating conditions under the premise of meeting the requirements of national emission standards are obtained. Through the analysis and research of this paper, it has positive reference significance for the environmental protection system design, the stable operation of the equipment, and the control of flue gas pollutant emissions to meet the prescribed standards of Yunnan thermal power plant and even the same type of units in China. It can also bring considerable social and environmental benefits.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：X773

【参考文献】