作　　者： ; ; ; ; ; ; (荆强征）;

机构地区： 西安交通大学能源与动力工程学院动力工程多相流国家重点实验室

出　　处： 《工程热物理学报》 2013年第11期2069-2072,共4页

摘　　要： 提出利用太阳能在管道运输过程中富集煤矿瓦斯加以回收利用,然后在催化剂作用下还原锅炉排烟中的NO_x.使用"树形"管道吸收太阳能,利用温度差形成的气体组分密度差,使得煤矿瓦斯在输送途中得以富集,经多级浓缩后可将甲烷体积浓度提高至80%,以寓集后的煤矿瓦斯为还原剂,在具有选择性的钙钛矿催化剂作用下还原NO_x,实现烟气脱硝,使排放的烟气中NO_x浓度低于100 mg/m^3.该方案能直接减少温室气体(甲烷)和可导致酸雨的污染物(NO_x)排放,并回收煤层气中的化学能.由于不再使用传统的选择性催化还原脱硝技术中的还原剂(氨或尿素),因此可以节约大量制备氨或尿素的天然气资源,同时避免了在制氨过程中产生的能源消耗和污染. The paper proposes a system enriching CBM during the transit with solar energy as its heat source while utilizing the concentrated coal mine gas to a selective catalytic reduction denitration system as its reductive agent. The tree-shape pipeline is employed to make good use of solar and build the appropriate temperature and density field in the tube. By the density difference effect, coal-bed gas can be enriched. The concentration of methane can reach to 80% after multistage enrichment. Then the concentrated CBM is used as a reducing agent and reduces NOx with the help of the chosen perovskite structure catalyst which is selective to the catalyzed reaction. This new denitration system can make the mass concentration of NOx in boiler flue gas lower than 100 mg/m3. This system contributes to reducing greenhouse gas and the gaseous pollutants （NOx） which can cause acidic rain emissions, while playing an active role in energy saving. Besides, avoiding using the traditional reducting agent （ammonia or carbamide）, it can save the natural gas and energy consumption in the productive process of ammonia or carbamide, while avoiding the emission in the productive progress.

关 键 词： 烟气脱硝 煤矿瓦斯 太阳能 选择性催化

领　　域： [动力工程及工程热物理]