摘要
为了提高碱液吸收氮氧化物废气的吸收效率,控制氮氧化物废气的排放,在直径为25 mm,高度1 000 mm的填料吸收塔内,对碱液吸收法治理含NOx工艺尾气的过程进行了研究,主要探讨了填料塔中的填料、吸收液、喷淋密度和氧化度对氮氧化物脱除效果的影响。结果表明:相对于同样的吸收条件,填料的表面积越大,空隙率越高,则吸收效果越好;NaOH溶液和Na2CO3溶液对氮氧化物都能达到较好的脱除效果,但是相对于最佳的脱除效果,NaOH溶液的质量浓度却比Na2CO3溶液的质量浓度低;碱液吸收含NOx工艺尾气的适宜喷淋密度为12 m3/(m2.h);当氧化度为50%左右时,吸收效果可以达到更好。
In order to enhance nitrogen oxides absorptivity and control emissions, the technology of nitrogen oxides absorption by alkaline solution in packed column with 625 mm and 1 000 mm in height was studied, and the effects of different packing, absorption solution, spray density and degree of oxidation on absorption ratio were discussed. The results show that absorption ratio increases with the increase of superficial areas and space cavity rate; although both NaOH solution and Na2CO3 solution can remove nitrogen oxides from flue gases, the mass concentration of NaOH solution is lower than that of Na2CO3 solution when the best absorption ratio is achieved; the suitable spray density is about 12 m^3/（m^2 · h） and the optimum degree of oxidation is approximate 50%.
出处
《化学工程》
CAS
CSCD
北大核心
2006年第9期63-66,共4页
Chemical Engineering(China)
关键词
碱液
吸收
氮氧化物
alkaline solution
absorption
nitrogen oxides
