基于ASPEN计算的高氨氮渗沥液汽提精馏耦合脱氨中试工艺设计
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摘要
以垃圾填埋场老龄填埋区高氨氮渗沥液为研究对象,通过小试研究得知当塔顶温度78℃,塔釜温度100℃,回流比为4∶1时,塔顶馏出液氨氮浓度65 000 mg/L,折合氨水浓度7.9%,塔釜液氨氮浓度<10 mg/L。根据小试结果,再结合水质特征,完成基于ASPEN计算结果进行汽提精馏耦合脱氨中试设计,设计规模为75 kg/h,效果预期为塔釜脱氨废水氨氮<100 mg/L、SS<600 mg/L、塔顶浓缩氨水含氨>15%。
With high ammonia nitrogen leachate in aging landfill asthe research object,through a laboratory test,it was found that when the tower top temperature was 78 ℃,the tower kettle temperature was 100 ℃ and the reflux ratio was 4∶1,the tower distillate concentration of ammonia nitrogen was 65 000 mg/L,the ammonia concentration was 7.9% and the ammonia nitrogen concentration in tower kettle liquid was less than 10 mg/L. Finally,according to the results of the laboratory test,combined with the characteristics of water quality,the pilot design of stripping and distillation coupled deamination based on ASPEN calculation results was completed. The design scale was 75 kg/h,and the expected effect was that ammonia nitrogen in the tower kettle deammoniation wastewater was less than 100 mg/L,SS was less than 600 mg/L,and ammonia content of the tower top concentrated ammonia was more than 15%.
With high ammonia nitrogen leachate in aging landfill asthe research object,through a laboratory test,it was found that when the tower top temperature was 78 ℃,the tower kettle temperature was 100 ℃ and the reflux ratio was 4∶1,the tower distillate concentration of ammonia nitrogen was 65 000 mg/L,the ammonia concentration was 7.9% and the ammonia nitrogen concentration in tower kettle liquid was less than 10 mg/L. Finally,according to the results of the laboratory test,combined with the characteristics of water quality,the pilot design of stripping and distillation coupled deamination based on ASPEN calculation results was completed. The design scale was 75 kg/h,and the expected effect was that ammonia nitrogen in the tower kettle deammoniation wastewater was less than 100 mg/L,SS was less than 600 mg/L,and ammonia content of the tower top concentrated ammonia was more than 15%.
引文
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[13]孙仁龙,刁建华,严文强,等. Aspen Hysys在油田净化商品油蒸馏装置的应用[J].化工自动化及仪表,2015,42(9):1019-1021.
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[2]孙艳波,周少奇,李伙生,等. SBR工艺处理晚期垃圾渗滤液的脱氮特性研究[J].环境科学,2010,31(2):357-359.
[3]王云刚,王剑锋.加碱脱氨技术在煤气化灰水汽提装置的应用[J].煤化工,2015,43(1):43-45.
[4]袁捷,杨宁,周艳军.吹脱法处理高浓度氨氮废水的研究[J].化学工业与工程技术,2009,30(4):55-57.
[5] Zhang J H,Li J D,Duke M,et al. Modelling of vacuum membrane distillation[J]. J Membrane Sci,2013,434(1):1-9.
[6]段明星,王建兵,王军,等.真空膜蒸馏和膜吸收及其集成工艺处理高氨氮废水[J].环境工程学报,2015,9(2):659-664.
[7]宋云华.农药行业氨氮废水减排及资源化利用关键技术:双效汽提废水脱氨成套技术[J].世界农药,2009,31(1):53.
[8]申涛,赵旭.机械蒸汽再压缩技术在高氨氮废水处理中的应用[J].化工机械,2013,40(6):816-818.
[9]刘晨明,林晓,陶莉,等.精馏法处理钼酸铵生产中的高浓度氨氮废水[J].有色金属,2015(11):69-74.
[10]秦庆军,贾鸿飞,王宇新.乙醇气提发酵与载气蒸馏耦合过程实验[J].过程工程学报,2002,2(1):58-61.
[11] Liu B X,Giannis A,Zhang J F,et al. Air stripping process for ammonia recovery from source-separated urine:Modeling and optimization[J]. J Chem Technol Biotechnol,2014,90(12):2208-2217.
[12]贺清尧,王文超,刘璐,等.沼液氨氮减压蒸馏分离性能与反应动力学[J].农业工程学报,2016,32(17):191-196.
[13]孙仁龙,刁建华,严文强,等. Aspen Hysys在油田净化商品油蒸馏装置的应用[J].化工自动化及仪表,2015,42(9):1019-1021.
[14]赵琛琛.工业系统流程模拟利器:ASPEN PLUS[J].电站系统工程,2003,19(2):56-58.
[15] ASPEN PLUS 10.0版用户指南[R]. Aspen Tech.
[16] ASPEN PLUS 10.0版物性方法和模型[R]. Aspen Tech.