王曲电厂600MW机组电除尘提效改造研究

发布时间：2018-04-26 08:38

本文选题：电除尘器 + 提效改造　；参考：《华北电力大学》2017年硕士论文

【摘要】：近年来,空气质量越来越受到人们的关注,冬季全国多地持续的雾霾天气更是严重影响到人们的身体健康和生活质量。随着环境问题的日益突出,国家制定了越来越严格的火力发电厂锅炉烟尘排放标准,这对新建燃煤发电厂或已有燃煤发电厂的烟尘排放都提出了更高的要求。王曲发电公司1、2号机组电除尘设备是按照2004年开始实施的《火电厂大气污染物排放标准》执行设计的,此标准规定燃煤机组排尘浓度标准执行50mg/m~3。加上机组长期运行,电除尘效率下降,难以长期持续维持排放烟气中的烟尘浓度不高于20mg/m~3或30mg/m~3。因此须对王曲电厂的电除尘器进行升级改造。本文汲取了国内外电除尘器的改造经验,结合王曲电厂的实际情况,提出了四类电除尘设备的改造方案:一是在静电除尘器的基础上适当改造并加装布袋除尘器形成电袋除尘器;二是增设布袋除尘器及其配套设施;三是对原来的静电除尘设备进行升级改造;四是电除尘不改造在脱硫塔后增加湿式电除尘器。针对四种改造方案,本文从设备投资、运行维护费用和年费用等经济性指标进行比较,由不同方案经济性分析看若三相电源改造后能够达到环保要求时其改造费用最低。因此王曲电厂采用对原来的静电除尘设备进行升级改造的方案。为进一步降低出口烟尘浓度及有效提高机组的脱硫效率,王曲电厂还进行了脱硫系统除雾器改造。经试验测试改造效果达到预定目标,符合最新的排放标准。
[Abstract]:In recent years, people pay more and more attention to the air quality, and the sustained haze weather in winter has a serious impact on people's health and quality of life. With the increasingly prominent environmental problems, the state has formulated more and more strict emission standards for boiler smoke and dust emissions from coal-fired power plants, which puts forward higher requirements for smoke emissions from new coal-fired power plants or existing coal-fired power plants. According to the Standard of Atmospheric Pollutant Emission of Thermal Power Plant, the electric precipitating equipment of No. 1 and No. 2 units of Wangqu Power Plant is designed according to the standard of emission of atmospheric pollutants from thermal power plants, which stipulates that the standard of dust removal concentration of coal-fired units shall be 50 mg / m ~ (3). Combined with the long-term operation of the unit, the efficiency of electric dust removal is decreased, and it is difficult to maintain the smoke and dust concentration in the flue gas for a long time to be no higher than that of 20mg/m~3 or 30 mg / m ~ (3). Therefore, it is necessary to upgrade the ESP of Wangqu Power Plant. This paper draws on the experience of domestic and foreign ESP retrofitting, combined with the actual situation of Wangqu Power Plant, Four kinds of retrofit schemes of electrostatic precipitator are put forward: one is to properly reform and install bag dust collector on the basis of electrostatic precipitator, the other is to add bag dust collector and its supporting facilities. The third is to upgrade the original electrostatic precipitator and the fourth is to increase the wet electrostatic precipitator after the desulfurization tower. According to the economic indexes of equipment investment, operation and maintenance cost and annual cost, this paper compares the four retrofit schemes. According to the economic analysis of different schemes, it is shown that if the three-phase power supply can meet the environmental protection requirements after the transformation, the cost of the revamping will be the lowest. Therefore, Wangqu Power Plant adopted the original electrostatic dust removal equipment upgrading scheme. In order to further reduce the smoke concentration at the outlet and effectively improve the desulfurization efficiency of the unit, the fogger of the desulphurization system was retrofitted in Wangqu Power Plant. The test and test results reach the target and meet the latest emission standards.
【学位授予单位】：华北电力大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621

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