黑龙江某燃煤电厂电袋复合式除尘器应用技术的研究

发布时间：2018-03-15 22:15

本文选题：除尘改造　切入点：静电除尘器　出处：《哈尔滨商业大学》2017年硕士论文　论文类型：学位论文

【摘要】：静电除尘器和布袋除尘器在空气污染控制领域中应用较为广泛,但单一除尘设备的缺陷较多,电袋复合式除尘器有机的结合了单一除尘器的有点,具有较高的除尘效率。将静电除尘器改造成为电袋复合式除尘器这种改造方法只需对原有的除尘设备进行部分改造,具有改造周期短、经济性好等优点。在实际的除尘器改造项目中,不仅会受到原有除尘器工艺系统条件的限制,还会出现原系统的引风机、气力输灰系统不能满足改造后袋式除尘器使用要求的问题。本文以黑龙江某热电厂除尘器改造项目为例,通过理论分析和具体的设计,并将具体的设计拿到工程中实践检验,提出了除尘器改造的总体设计路线和方法,主要工作内容如下,(1)对电袋复合式除尘器内袋除尘区域的关键参数进行详细的设计,并核算工作压力、设备功率以及各灰斗的输灰量,确定原有电除尘系统引风机能够满足改造后除尘器的需求,对无法满足新除尘系统需求的气力输灰系统进行改造。(2)对煤质、电压和电流以及机组的运行情况进行了测试。结果显示煤质的灰分、低位热值波动不大,煤质较稳定;电场中的电流、电压运行稳定,符合标准;机组的运行正常,系统运行良好。为后续除尘效果的测试打下了良好的基础。(3)除尘器测试期间,运行阻力以及处理烟气总量均在设计范围之内,除尘器出口烟尘排放浓度小于20mg/m3,除尘效果得到了有效地提高,并且符合中国大气污染颗粒物排放标准的要求,工程实践证明该改造方案合理有效。(4)为了证明设计的可行性和合理性,本文利用FLUENT软件对改造前后的除尘器进行模拟分析,为"电改袋"改造技术提供了理论基础。本文探讨了黑龙江某燃煤电厂除尘器改造工程的设计以及实际应用中的投运效果,为其他燃煤电厂除尘器的改造提供了参考。目前,电袋复合式除尘器的应用还不是很广泛,但可以预见,复合式除尘器结合了电除尘和布袋除尘的优点,必然会为发电企业在今后的升级改造中趋势得到广泛的应用。
[Abstract]:Electrostatic precipitator and bag dust collector are widely used in the field of air pollution control, but there are many defects in single dust collection equipment. The method of transforming electrostatic precipitator into electric bag composite dust collector only needs partial transformation of the original dust removal equipment, and has short transformation period. In the actual project of retrofitting the dust collector, it will not only be restricted by the original condition of the process system of the dust collector, but also will appear the original system of induced fan, The pneumatic ash conveying system can not meet the requirements of the modified bag dust collector. This paper takes the retrofit project of the dust collector in a thermal power plant in Heilongjiang as an example, through theoretical analysis and concrete design, and puts the concrete design to the practical test in the project. This paper puts forward the overall design route and method of the retrofit of the dust collector. The main work contents are as follows: 1) the key parameters of the dust removal area in the bag of the electric bag composite dust collector are designed in detail, and the working pressure is calculated. Equipment power and ash carrying capacity of each ash hopper, determine that the original electrostatic precipitator system can meet the needs of the dust collector after the transformation, and transform the pneumatic ash transportation system which can not meet the requirements of the new dust removal system to improve the coal quality, The results show that the ash content of coal quality, low calorific value fluctuates little, the coal quality is stable, the current and voltage in electric field are stable and accord with the standard, the operation of the unit is normal. The system runs well. It lays a good foundation for the test of dust removal effect. During the testing period of dust collector, the running resistance and the total amount of flue gas treatment are all within the design scope. The dust emission concentration at the outlet of the dust collector is less than 20 mg / m ~ 3, so the dust removal effect has been effectively improved and meets the requirements of China's standards for the discharge of particulate matter from air pollution. In order to prove the feasibility and rationality of the design, this paper uses FLUENT software to simulate and analyze the dust collector before and after the retrofit. This paper discusses the design of the retrofit project of the dust collector in a coal-fired power plant in Heilongjiang and the practical application effect, which provides a reference for the retrofit of the dust collector in other coal-fired power plants. The application of electric bag composite dust collector is not very extensive, but it can be predicted that the composite dust collector combines the advantages of electric dust collection and cloth bag dust removal, and it will certainly be widely used in the future upgrade and transformation of power generation enterprises.
【学位授予单位】：哈尔滨商业大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM621.73

【参考文献】