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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.
It is proposed to use solar energy to enrich the coal mine gas during pipeline transportation and recycle the NO_x in the exhaust gas of the boiler under the action of the catalyst. The solar energy is absorbed by the “tree” pipe and the density difference of the gas components formed by the temperature difference , So that coal mine gas can be enriched on the way of transportation. After multi-stage concentration, the methane concentration can be increased to 80%. After the collected coal gas is used as reductant, NO_x can be reduced under the selective perovskite catalyst So as to realize the flue gas denitrification so that the NO_x concentration in the flue gas will be lower than 100 mg / m ~ 3. The scheme can directly reduce the emission of greenhouse gases (methane) and pollutants (NO_x) that can cause acid rain and recover the coalbed methane Of the chemical energy due to the elimination of the traditional selective catalytic reduction denitration technology (ammonia or urea), it can save a lot of ammonia or urea in the production of natural gas resources, while avoiding the ammonia consumption in the process of generating energy consumption And pollution.