辽河油田火电厂锅炉烟气脱硫技术选择与研究

发布时间：2018-04-03 13:29

本文选题：烟气污染　切入点：脱硫技术　出处：《东北石油大学》2016年硕士论文

【摘要】：2014年国家提出当前环保工作的重点之一是治理二氧化硫污染,在我国要防治二氧化硫污染,控制火电厂、工业锅炉及窑炉等三大项烟气源的排放是关键。目前,国内外普遍采用的燃煤脱硫方法主要有三种:一是燃烧前脱硫,二是燃烧中脱硫固硫,三是燃烧后脱硫又即烟气脱硫技术(FGD)是解决烟气排放污染的主要途径。辽河油田热电厂在脱硫方面起步较晚,现有设备脱硫效率低,达不到排放要求,若想要继续生存,必须寻找合适的脱硫技术。论文的主要研究内容就是通过对国内外火电厂脱硫技术的对比分析,综合考虑辽河油田热电厂的具体客观条件,最终选择出适合的脱硫技术,并且保证其应用之后能够达到理想的脱硫效果。经过对现有主流脱硫方法的比较筛选,最终确定了采用回流式循环流化床半干法烟气脱硫法。该方法具有技术先进、工艺成熟、脱硫率高、初期投资小、运行维护费用低的特点,符合我厂的实际情况。在方案的具体实施阶段,进行了气气换热器的安装必要性讨论,确定其没有投资的必要;对脱硫塔主体参数进行了设计,计算保证较高脱硫效率时的最小反应塔尺寸;除雾器的自行改造,采用增强聚丙烯代替不锈钢体,减小腐蚀造成的影响;对吸收剂输送管材进行升级;选择出合适的SO_2排放量统计方法;对脱硫系统进行了调试。最后系统运行正常,调试后烟气SO_2含量低于200 mg/Nm~3,达到了预期目标。
[Abstract]:In 2014, the state put forward that one of the key points of current environmental protection work is to control sulfur dioxide pollution. In our country, it is the key to control the emission of three major flue gas sources, such as thermal power plant, industrial boiler and kiln.At present, there are mainly three kinds of coal-fired desulfurization methods adopted at home and abroad: one is desulfurization before combustion, the other is desulphurization and sulfur fixation during combustion, and the third is desulfurization after combustion, that is, FGD), which is the main way to solve flue gas emission pollution.The thermal power plant in Liaohe Oilfield started late in desulfurization, and the existing equipment has low desulfurization efficiency and can not meet the emission requirements. If we want to continue to survive, we must find suitable desulfurization technology.The main research content of this paper is to choose the suitable desulfurization technology by comparing and analyzing the desulfurization technology at home and abroad, considering comprehensively the specific objective conditions of the thermal power plant in Liaohe Oilfield.And to ensure that it can achieve ideal desulfurization effect after its application.Through the comparison and screening of the existing mainstream desulfurization methods, the reflux circulating fluidized bed semi-dry flue gas desulfurization method was finally determined.This method has the characteristics of advanced technology, mature technology, high desulfurization rate, low initial investment and low operating and maintenance cost, which accords with the actual situation of our plant.In the concrete implementation stage of the scheme, the necessity of installation of gas-gas heat exchanger is discussed, and the necessity of no investment is determined, the main parameters of desulfurization tower are designed, and the minimum reaction tower size is calculated to ensure higher desulfurization efficiency.In order to reduce the influence caused by corrosion, the demister was reformed by using reinforced polypropylene instead of stainless steel body. The absorbent conveying pipe was upgraded; the appropriate SO_2 emission statistics method was selected; and the desulfurization system was debugged.Finally, the system runs normally, and the SO_2 content of flue gas is lower than 200mg / Nmf3 after debugging, which achieves the expected goal.
【学位授予单位】：东北石油大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：X773

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