乌拉特电厂电除尘改造技术研究

发布时间：2019-05-07 07:46

【摘要】：面对日益提高的烟尘排放要求,加之逐渐提高的环境保护意识,降低发电烟尘排放浓度成了当务之急。在发电厂众多设备中除尘器是烟气除尘的最主要设备,因此对除尘器的提效改造就显得尤为必要。本文结合乌拉特电厂实际情况,对乌拉特电厂电除尘改造技术进行研究,选题具有工程应用价值。论文首先介绍了除尘器的工作原理、分类和性能指标,重点分析了电厂常用的静电除尘、袋式除尘和电-袋复合除尘的原理和各自优缺点。之后结合乌拉特电厂的实际情况提出了原厂电除尘器的三种改造方案:将原电除尘器更换高频电源改进控制系统的方案一、将电除尘改造为袋式除尘的方案二以及将电除尘改为电-袋复合除尘的方案三。然后通过除尘指标、改造工作量、改造成本和运行维护成本各方面的技术经济比较,确定了电厂除尘器改造的最终方案。在此基础上,结合具体机组除尘器情况,详细设计了原电除尘器的具体改造措施。最后对比分析了乌拉特电厂电除尘器技术改造前后的除尘效果和节电效果,分析表明通过将首级电场电源更换为高频电源和对整个除尘控制系统的升级改造,电厂烟气可以满足最新的排放要求,而且还可以大幅度降低除尘器的运行电耗。
[Abstract]:It is urgent to reduce the emission concentration of power generation dust due to the increasing demand for dust emission and the increasing awareness of environmental protection. Dust collector is the most important equipment of flue gas dedusting in many equipments of power plant, so it is necessary to improve the efficiency of dust collector. Based on the actual situation of Wulat Power Plant, this paper studies the electrodedusting technology of Wulat Power Plant, and the selected topic has engineering application value. Firstly, the paper introduces the working principle, classification and performance index of the precipitator, and analyzes the principles, advantages and disadvantages of electrostatic precipitator, bag dedusting and electric-bag compound dedusting, which are commonly used in power plant. Then, according to the actual situation of Urat Power Plant, this paper puts forward three retrofitting schemes of the electric precipitator of the original plant: the scheme of replacing the original electrostatic precipitator with the high frequency power supply and improving the control system. The second scheme is to change the electrodedusting into bag dedusting, and the third is to change the electrodedusting to the electric-bag compound dedusting. Then through the technical and economic comparison of dust removal index, reconstruction workload, transformation cost and operation and maintenance cost, the final scheme of dust remover transformation in power plant is determined. On this basis, combined with the specific situation of the unit dust collector, the detailed design of the original electrostatic precipitator concrete improvement measures. Finally, the dust removal effect and energy saving effect before and after the technical transformation of the electric precipitator in Wulat Power Plant are compared and analyzed. The analysis shows that by replacing the first stage electric field power supply with the high frequency power supply and upgrading the whole dust removal control system, The flue gas of the power plant can meet the latest emission requirements and greatly reduce the operation power consumption of the precipitator.
【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】：TM621.73

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