High Efficiency SOx, NOx, Particulates Simulataneous Removal from Power Plant and Diesel Emission

需要单独的NOx、颗粒物和SOx去除系统来控制发电厂和热电联产系统等固定污染源的排放。尽管电除尘器和SOx脱除系统的效率很高，但脱除NOx系统存在脱除效率和运行成本的问题。为了开发这一创新技术，利用柴油机的实际排放和工作温度，利用单级等离子体-化学混合系统开发了高效的NOx、SOx和颗粒物同时脱除系统。该系统对各组分的去除效率、电力消耗、副产品鉴定、优化和经济分析进行了有效值评估。在前人研究的基础上，我们选择了等离子体产生的脉冲电源与化学反应器相结合，对设计一个全尺寸的等离子体-化学混合系统进行了工程评估。结果，NOx、SOx和88%以上的低阻、难收集细颗粒物的脱除效果分别达到75%、93%和88%以上。副产物CO和N2O含量低于10ppm。仅NOx的运行成本就不到商业上可用的选择性催化还原(SCR)系统的四分之一，等离子体-化学混合系统的NOx约为4,200美元/吨，而SCR工艺的NO约为12,000美元/吨。此外，可以取消颗粒物和SOx去除系统，从而导致更显著的成本降低。

Separate NOx, particulates, and SOx removal systems are required for controlling the emission from the stationary source such as power plants and cogeneration systems. Although the electrostatic precipitator and SOx removal systems are highly efficient, NOx removal system has problems associated with removal efficiency and operating cost. For the purpose of development of the innovative technology, high efficient NOx, SOx and particulates simultaneous removal system was explored using the single-stage, plasma-chemical hybrid system with the use of real diesel engine emission and operating temperature. The system was evaluated in rms of removal efficiency for each constituent, power consumption, byproducts identification, optimization, and economic analysis. Based on data obtained from the previous reseach, we selected the pulse power supply for the plasma generation combined with the chemical reactor to obtain the engineering evaluation toward designing a full-scale plasma-chemical hybrid system. As a result, more than 75% of NOx, 93% of SOx, and 88% of low resistive and difficult to collect fine particulates were obtained. Byproducts such as CO and N_2O were with less than 10 ppm. The operating cost of NOx alone is less than 1/4 of the commercially available selective catalytic reduction (SCR) system, which is approximately $4,200/ton of NO for the plasma-chemical hybrid system as opposed to $12,000/ton of NO for the SCR process. In addition, particulates and SOx removal systems can be eliminated which leads to more significant cost induction.