Basic Study on Treatment of Pollutant Hard-Treated Wastes by non-thermal plasma

本研究将等离子体技术应用于含卤素和重金属的难处理废弃物的处理，研究了等离子体场下废弃物的分解行为。本研究报告了以下实验调查的结果：(1)在非热等离子体分解处理卤素化合物气体的情况下，探讨等离子体气氛控制污染物副产物完全分解和抑制的可能性(2)高密度等离子体特性的研究以及等离子体从废物中分离所涉及金属化合物的技术本研究是关于非热等离子体分解卤素化合物气体的技术。等离子体场中共存气体对哈龙、氟里昂等卤素化合物气体分解的影响。在大气环境中模拟处理的实验表明，O2的存在降低了分解速率，降低了含O原子污染物的排放。证实了在加入H2使游离卤素原子结合的情况下，卤素化合物气体的分解速度加快。为了稳定游离卤素原子并产生酸性气体，在等离子体场中直接引入了碱吸附剂。在反应器中沉淀吸附剂，不仅能提高分解速率，还能降低卤素副产物的含量。通过实验研究了高频火炬等离子体在固体废物中分离有价金属化合物的能力。实验结果表明，等离子体密度（np）达到2.6x1015cm-3，激发温度达到1.7eV。在这种获得的等离子体条件下，几种金属氧化物可以瞬间蒸发，这些化合物可以分解成原子或离子。下一步实验应清除等离子体场中共存固体物质的影响，因为已知等离子体场中杂质的存在会使等离子体场的条件变得不稳定。少

In this research work, we applied the plasma technology for treatment of hard-treated wastes, which contain halogens and heavy metals, and investigate the decomposition behavior of wastes in plasma field was investigated. This research work reported the results obtained from the following experimental investigation, i) investigation of the possibility of plasma atmosphere controlling for completely decomposition and depression of pollutant by-product in the case of decomposition treatment of halogen compound gases by non-thermalplasma ii) investigation of the characteristics of high density plasma on the plasma technology for separating the involved metal compounds from wastesIn this research work about the technology for decomposition of halogen compound gases by non-thermal plasma, the influence of coexisting gas in plasma field on the decomposition of halogen compound gases like halon and freon. The experiments, simulated the treatment in the air atmosphere, indicated that the prese … More nce of O2 cause the decrease of decomposition rate and the emission of pollutant products, which contained O atom. It was confirmed the increase of decomposition rate of halogen compound gases in the case of addition of H2 for combining the free halogen atom. In order to stabilize the free halogen atom and produced acid gases, alkali sorbent was introduced in the plasma field directly. The sorbent settled in the reactor has the effect not only of the increase of decomposition rate but also depression of halogen by-products.The experiments were carried out to evaluate the ability of high frequency torch plasma in the system for the separating valuable metal compounds from solid wastes. The experimental results demonstrated that the plasma density (np) reached 2.6x1015cm-3, and the excitation temperature became 1.7eV. In this obtained plasma condition, severalmetaloxides can evaporate instantly and these compounds can be decomposed to atom or ion. As a next experimental step, it should be cleared the effect of coexisting solid material in the plasma field, because it has been known that the condition of plasma field become unstable owing to the presence of impurities in the field. Less