脉冲放电脱硫反应器电参数测量及结构优化

【作者】 张轶；

【导师】 吴彦；

【作者基本信息】 大连理工大学 ， 环境工程， 2003， 硕士

【摘要】 本课题运用实验方法对脉冲放电低温等离子体线—板式脱硫反应器的放电特性、电极配置形式对脱硫效率的影响以及脉冲能量沿放电线的传输进行了较为深入和系统的研究，目的是为该技术的工业化应用提供科学依据。主要研究内容和结论有： 1、在室温、空气介质条件下，研究了不同初级电压、不同成形电容匹配、不同线板间距、不同放电极邻距等因素对放电特性的影响，得到了反应器的放电规律：脉冲峰值电压、基压和拖尾电压随放电极邻距的增大先减小，然后增大；脉冲能量则随放电极邻距的增大先增大，然后减小。并根据本实验结果，得出了反应器线—板结构优化配置的经验公式b=0.3c+3.75(式中b为放电线间距，c为线—板间距，单位都是cm)。 2、经过对放电极在不同脉冲峰值电压、不同末端匹配、不同放电线直径下进行的能量衰减实验研究，得到了高压脉冲能量在电晕放电极上以行波形式传播、衰减的规律：高压脉冲能量沿电晕线迅速衰减，脉冲波形显著畸变；峰值电压越高，电晕线越细，放电越强，衰减越快；电晕线尾端受行波反射影响较大。并得出：在进行反应器的设计时，为提高脱硫效率和能量利用率，合理设计反应器的尺寸，提高反应器的性价比，放电线的长度不宜过长，一般不应超过10m。 3、在烟气量为200Nm~3/h烟气脱硫装置上进行了脱硫实验研究，通过脱硫率与电极结构和电源匹配关系的研究结果，验证了反应器结构优化的经验公式，并提高了脱硫效率。更多还原

【Abstract】 In this paper, detailed studies were made on discharge characteristics of pulse corona reactor, the influences of electrode configuration on desulfurization and pulse energy transmission along the discharge wires for industrial application of the technique. The following results were obtained.1. The influence factors (such as voltage, pulse forming capacitance, wire-to-plate spacing, wire-to-wire spacing) on discharge characteristics are researched on the condition of room temperature and air medium, and the discharge characteristics of reactor are obtained: the peak value, minimum value and wave tail of pulse voltage firstly increase with the increase of wire-to-wire spacing, then all decrease; but pulse energy firstly decreases with the increase of wire-to-wire spacing, then increases. According to experimental conclusion, the experimental formula of the optimized electrode configuration, b=0.3c+37.5 (b, wire-to-wire spacing; c, wire-to-plate spacing) is gotten.2. The attenuation and distortion law of pulse voltage transmitting on discharge electrode is obtained by research of energy attenuation on different conditions (such as voltage, terminal matching and diameter). Pulse voltage sharply decreases due to the corona. The higher the pulse voltage, the thinner the diameter of the wire, then the more seriously the pulse voltage attenuates; the tail of the corona wire is more influenced by the reverberation. The sharp attenuation of the corona along the wire has to be considered in designing a real reactor for getting higher reacting efficiency and the length of wire should be no more than 1 Om.3. On the basis of above-mentioned experimental conclusions, an experimental desulfurization system with the flux of 200Nm3/h is optimized, and preferable efficiency of desulfurization is obtained.更多还原