为了提高脱硫脱硝效率同时合理利用火电厂产生的飞灰,研究了醋酸钙中加入飞灰制备的复合脱硫脱硝剂的热解性能.对不同条件下制得的醋酸钙/飞灰复合脱硫脱硝剂的热重特性、X射线衍射图谱、比表面积、扫描电镜结果等进行了分析,结果表明:利用醋酸钙和飞灰水合制备的脱硫脱硝剂具有比单纯的醋酸钙和飞灰更大的比表面积;经过900℃煅烧后脱硫脱硝剂孔隙结构最好;脱硫脱硝剂经过900℃煅烧后的热解产物(SiO2、Al2O3、Fe2O3和CaO)有助于脱除烟气中的硫氧化物和氮氧化物.
In order to improve the efficiency of absorbent for desulfurization and denitrification simultaneously to utilize the coal fly ash produced by thermal power plants more effectively,this paper analyzed the pyrolysis of the compound absorbent used as desulfurizer and denitrificater which was prepared from calcium acetate and coal fly ash. TG,XRD,BET and SEM analyses about the compound absorbent produced under different conditions showed that:the compound absorbent which was obtained through hydration of calcium acetate and coal fly ash had the greater spe-cific surface area than calcium acetate and coal fly ash,and it had the best pore structure after 900 ℃ calcination;The pyrolysis products (SiO2 ,Al2O3 ,Fe2O3 and CaO)of the compound absorbent after 900 ℃ calcination are helpful for removing sulfur oxides and nitrogen oxides from flue gas.
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