Complete SOx and NOx Removal Using Plasma Concertration Technique

典型的发电厂排放的气体量非常大，NOx和SOx的浓度很低，在100-200ppm之间。由于NOx和SOx脱除系统的规模变得很大，而且无论控制设备的选择如何，运行成本都变得很高，因此按原样处理这些气体是低效和不经济的。应用我们开发的更经济合理的低温等离子体气体浓缩技术，首先将烟气与吸附材料吸附，然后用低温等离子体解吸。我们能够从低浓度的大体积转化为高浓度的小体积。等离子体解吸浓缩技术是在常压、低温、低能量、短处理时间下实现的。此外，吸附的材料可以重复再生。这项技术能够将气体体积减少一个数量级，从而显著缩小设备尺寸。我们的研究主要集中在利用等离子体解吸和低温等离子体-化学混合系统的浓缩技术来开发新型的NOx脱除系统。根据前一年所获得的基本数据，对填充分子轮的脉冲电晕等离子体反应器进行了研究，以确定最佳条件。结果，气体体积减少了一个数量级，而浓度增加了20多倍。

Gas volume from a typical power plant is extremely large and NOx and Sox concentrations are low in the range or 100-200 ppm. It is inefficient and not economical to treat these gases as they are because the size of NOx and SOx removal systems becomes large and the running cost becomes high regardless the selection of the control device. Applying more economically sound gas concentration technology using the nonthermal plasma, which we developed, the flue gas was initially adsorbed with the adsorption materials and the adsorbed gas was then desorbed by the nonthermal plasma. We are able to convert from large volume with low concentration to low volume with high concentration. The concentration technique by the plasma desorption was attained at atmospheric pressure and low temperature with low energy and short treatment time. Moreover, adsorbed materials can be regenerated repeatedly. This technology is able to reduce the gas volume by one order of magnitude, resulting in a significant reduction of equipment size. Our research is focused on the development of innovative NOx removal system by employing the concentration technique using the plasma desorption and the nonthermal plasma-chemical hybrid system. Based on the fundamental data obtained from the previous year, the pulsed corona plasma reactor packed with molecular sheaves was investigated to determine the potimum condition. As a result, the gas volume was reduced by one order of magnitude, while the concentration increased more than 20 times.