硕士论文电力电子与电力传动研究生毕业论文题目 流光放电等离子体烟气脱硫反应器、电源及其匹配问题研究专 业：电力电子与电力传动流光放电等离子体烟气脱硫反应器、电源及其匹配问题研究摘 要燃煤烟气所含的烟尘、二氧化硫、氮氧化物等有害物质是造成大气污染、酸雨和温室效应的主要根源。脉冲电晕法烟气脱硫脱硝技术经过各国科技人员的不断努力，目前已经发展到工业试验阶段。脉冲电源问题是脉冲电晕法脱硫脱硝技术产业化的难以克服的困难之一。交直流叠加电源流光放电等离子体发生技术的出现，以及在此基础上的烟气脱硫工艺流程的实现，使流光放电烟气脱硫技术工业应用近在眼前。交直流叠加电源发生流光电晕与脉冲电源发生的流光在脱硫脱硝效果是相同的。交直流叠加电源采用电力电子开关器件代替火花隙的，这样可以大大的提高开关的寿命以及电源工作的可靠性和稳定性。电源采用交直流电源叠加的方式，交流电压使放电增强，产生自由基增多，因而氧化脱除量增加；直流基压驱使正离子和电子离开流光通道，在更大的范围内发生复合反应，自由基分布更广，交直流叠加可以产生稳定、宽范围和有效的流光。该交直流叠加电源采用高频电能变换技术，利用谐振的工作方式，在谐振升压的同时可以实现逆变电路开关管的零电流关断，减少开关损耗和散热器的体积。同时串联电感的应用使电源可以可靠的工作在负载频繁放电的条件下。反应器作为交直流叠加电源的负载对电源的工作状态有很大的影响；在电源和反应器系统中流光的发生不能脱离反应器，电源和反应器必须结合在一起进行研究。本文主要针对流光放电等子体烟气脱硫反应器、交直流叠加电源及其匹配问题进行研究。本文分析了流光放电脱硫反应器的负载特性，利用镜像法，计算了线板结构反应器的静态电容。研究了如何优化反应器的板电极宽度、放电极邻距等电极配置形式，从而提高交直流叠加电源的效率和脱硫系统能量利用率。在12000Nm3/h工业中试试验平台上，在模拟烟气的情况下，对流光放电烟气脱硫反应器、电源系统以及以此为基础的整个工艺流程进行了大量的实验研究，获得了良好的实验结果，确定了工艺流程的大量的工业运行参数，为以后大规模工业应用积累了宝贵经验。关键词：烟气脱硫，流光放电，交直流叠加，反应器，匹配THE RESEARCH OF STREAMER DISCHARGE PLASMA FGD REACTOR, AC+DC POWER SUPPLY AND MATCH PROBLEM OF THEMABSTRACTSoot, SO2, NOX and other deleterious matters contained in flue gas are the main roots of atmosphere empoison, acid rain and greenhouse effect. Many achievements in the technology of DESO2 from flue gas by PPCP(Pulse Corona Induced Plasma Chemical Process) have been achieved and this technology will be enlarged into industrial scale in the future. Pulse power supply problem is the primary difficulty to DESO2 and DENOX from flue gas by PPCP. Industrial application of DESO2 and DENOX from flue gas by streamer discharge will come into true soon with the utilizing of the technology of inspiring streamer discharge plasma by AC+DC power supply and the achieving technical process based on this.Streamer corona induced by AC+DC power supply has the same effect of DESO2 with streamer corona induced pulse power supply. This power supply uses the solid-state switch to take place the spark-gap switch, which will increase the life span of switch and the stability & dependability of power supply. The output of the power supply is the AC supposed on the DC in order to produce effective and steady streamer at a broad range. AC makes the discharging stronger and increases the energy density and free radical quantity in the reactor. DC spreads cation and free radical to a broad range.The AC+DC power supply make use of the technology of high frequency power transform and resonant. Using the resonant technique can realize ZCS and decrease switching loss. At the same time the series inductance can make the power supply work normally under the condition of frequent discharging in the reactor.Reactor has a great influence to working state of AC+DC power supply as its load and cant be leaved out of account from the system producing streamer discharge. So the study on reactor and power supply must be taken into account synchronously. The paper mainly researches streamer discharge plasma DESO2 reactor, AC+DC power supply and the switch problem of them.In the paper, the load characteristic of streamer discharge DESO2 reactor is analyzed and the static capacitance of the line-plane reactor is calculated with the method of enantiomorphy. The paper researches into optimizing electrode configurations of streamer discharge reactor such as the distance between discharge electrodes and panel electrodes, which can improve the power factor of AC+DC power supply and energy utilizing rate of the DESO2 system. Streamer discharge plasma DESO2 reactor, AC+DC power supply and the whole DESO2 system are investigated comparatively deeply in the pilot test of 12,000Nm3/h. The pilot run demonstrates that the whole system is feasible. All works supply useful method and experience for larger industrial application. KEY WORDS：FGD，streamer discharge，AC+DC，reactor, match目 录1 绪论11.1 前言11.2 等离子体烟气脱硫国内外研究现状21.2.1 电子束法21.2.2 脉冲电晕法31.2.3 交直流叠加电源流光放电等离子体发生技术51.2.4 有关反应器的研究综述51.3 流光放电等离子体烟气脱硫工艺流程介绍61.4 本课题的主要研究内容72 流光放电等离子体烟气脱硫反应器的初步研究92.1 反应器负载特性分析92.2 线板电极结构静态电容的计算102.3 不同供电方式的电晕放电模式122. 3.1 直流供电的电晕放电模式122. 3.2 交直流叠加供电的电晕放电模式142.4 反应器电极配置的实验研究152.4.1 实验装置152.4.2 测量系统152.4.3 实验结果及分析162.4.4 讨论183 交直流叠加电源的工作原理