尿素、碳酸氢铵/添加剂同时脱硫脱硝试验研究

在鼓泡反应装置上进行了尿素、碳酸氢铵/三乙醇胺溶液同时脱硫脱硝的试验研究,比较尿素和碳酸氢铵的脱硫脱硝性能,试验分别对液位、吸收剂组成以及SO2体积分数等参数对脱硝效率的影响规律进行了研究.结果表明:液位、吸收液中尿素/碳酸氢铵的比例及SO2入口浓度对NOx的脱除效率均有重要的影响,液位在459 mm时2种吸收液的脱硝...

Experimental investigation on simultaneous removal of SO2 and NOx by solutions of urea and ammonium bicarbonate/additives

Experimental research of simultaneous removal of NOx and SO2 with aqueous urea and ammonium bicarbonate/additives solution was carried out in a bubbling reactor,where the effects of two different aqueous(urea and ammonium bicarbonate) on the NOx removal characteristics were investigated.A series of experimentations were carried out to study the effect of operation parameters,such as liquid level,sorbent composition and SO2 concentration.The results show that liquid level,mass ratio of urea and ammonium bicarbonate in mixed solution and SO2 concentration have a significant effect on the removal efficiency of NOx.Two absorbents have the highest denitrification efficiency when liquid level reaches 459 mm.Increasing the proportion of ammonium bicarbonate in multiple solvent is unfavorable to NOx removal.The average denitrification efficiency with solution of 5% urea+5% ammonium bicarbonate/triethanolamine(0.015%) reduces by only 9% compared with 10%urea/triethanolamine(0.015%),and the removal efficiencies of NOx and SO2 can still reach 63% and 97% respectively,while the costs of absorbent decrease by nearly 30%.The existence of SO2 has synergistic effect on the absorption of NOx,the sulfite ions play reductive role on NOx which make the denitrification efficiencies of two absorbents increase about 3%.