金属丝网错流旋转填料床脱除胶清中氨的性能
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摘要
应用金属丝网错流旋转填料床对天然胶清中的氨进行空气吹脱脱除.通过正交实验和单因素实验考察了显著性影响大小和影响规律,并得到最佳操作条件.正交实验显示:显著性影响依次为气体流量G>原料氨含量x_w>液体温度T_L>超重力因子β>进料流量L>气体温度T_G.单因素实验显示:脱氨率η随着G,T_L,T_G的增大而增大,随着L的增大而减小,随着β的增大而先增大后减小,气相体积总传质系数k_ya_e有相同的变化规律.应用无因次分析法,建立了超重力胶清脱氨过程中各影响因素对脱氨率影响的数学模型,其相关系数R~2大于0.95,最大偏差9.72%,平均偏差4.88%,说明该关联式与实验数据基本吻合.与传统胶清脱氨方法对比,超重力法具有脱氨率高、易于氨气回收等优点.
The air stripping of ammonia in natural rubber skin was carried out by using cross-flow rotating packed bed with wire mesh packing.The effects of significant influences size and rule and influences were investigated by orthogonal experiment and single factor experiment,and the optimal operating conditions were obtained.The results of Orthogonal test show that the significant of influence to each performance of compact is in sequence gas flow rate G>ammonia content of raw material x_w>liquid temperature T_L>high gravity factor β>feed flow L>gas temperature T_G.The results of single factor experiment show that the ammonia removal rate increases with the increase of gas flow,liquid temperature and gas temperature,decreases with feed flow rate increasing,furthermore increases first and then decreases with the growth of the high gravity factor,which has the same change rule as the gas phase volumetric overall mass transfer coefficient k_ya_e.With dimensionless analysis method,a mathematical model was established for the influence of various factors on the ammonia removal rate in the process of high gravity ammonia removal,of which correlation coefficient R~(2)is greater than 0.95,the maximum deviation is 9.72%,and the average deviation is 4.88%,indicating that the association formula can basically coincide with the experimental data.Compared with the traditional method of removing ammonia from rubber skin,the high gravity method of removing ammonia from rubber skin has the advantages of high ammonia removal rate and easy to recycle ammonia gas,etc.
The air stripping of ammonia in natural rubber skin was carried out by using cross-flow rotating packed bed with wire mesh packing.The effects of significant influences size and rule and influences were investigated by orthogonal experiment and single factor experiment,and the optimal operating conditions were obtained.The results of Orthogonal test show that the significant of influence to each performance of compact is in sequence gas flow rate G>ammonia content of raw material x_w>liquid temperature T_L>high gravity factor β>feed flow L>gas temperature T_G.The results of single factor experiment show that the ammonia removal rate increases with the increase of gas flow,liquid temperature and gas temperature,decreases with feed flow rate increasing,furthermore increases first and then decreases with the growth of the high gravity factor,which has the same change rule as the gas phase volumetric overall mass transfer coefficient k_ya_e.With dimensionless analysis method,a mathematical model was established for the influence of various factors on the ammonia removal rate in the process of high gravity ammonia removal,of which correlation coefficient R~(2)is greater than 0.95,the maximum deviation is 9.72%,and the average deviation is 4.88%,indicating that the association formula can basically coincide with the experimental data.Compared with the traditional method of removing ammonia from rubber skin,the high gravity method of removing ammonia from rubber skin has the advantages of high ammonia removal rate and easy to recycle ammonia gas,etc.
引文
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[15]柳来栓,谢国勇,刘有智.旋转填料床处理含氨废水实验研究[J].中北大学学报(自然科学版),2002,23(3):222-225.Liu Laishuan,Xie Guoyong,Liu Youzhi.Experimental study on treatment of ammoniac nitrogen wastewater with rotating packed bed[J].Journal of North China Institute of Technology(Natural Science Edition),2002,23(3):222-225.(in Chinese)
[16]栗秀萍,刘有智,栗继宏,等.超重力连续精馏过程初探[J].现代化工,2008,28(s1):75-79.Li Xiuping,Liu Youzhi,Li Jihong,et al.Preliminary studies on the super gravity continuous distillation[J].Modern Chemical Industry,2008,28(s1):75-79.(in Chinese)
[17]郭强,祁贵生,刘有智,等.新型板式填料旋转床压降性能研究[J].天然气化工:c1化学与化工,2017,42(5):52-56.Guo Qiang,Qi Guisheng,Liu Youzhi,et al.Pressure drop characteristics of a new type plate packing in a rotating packed bed[J].Natural Gas Chemical Industry,2017,42(5):52-56.(in Chinese)
[2]张哲,廖双泉,郭明万,等.高级胶清橡胶的性能[J].材料科学与工程学报,2013,31(5):758-761.Zhang Zhe,Liao Shuangquan,Guo Mingwan,et al.Performance of High-grade Skim Rubber[J].Journal of Materials Science &Engineering,2013,31(5):758-761.(in Chinese)
[3]刘春芳,张兰波.氨含量和贮存时间对原产天然胶乳和胶清胶乳凝聚物性能的影响[J].世界橡胶工业,2012,39(11):17-22.Liu Chunfang,Zhang Lanbo.Effect of ammonia content and storage time on the properties of natural rubber latex and rubber latex condensate[J].World Rubber Industry,2012,39(11):17-22.(in Chinese)
[4]张哲.胶清橡胶品质提升及性能研究[D].海口:海南大学,2013.
[5]黎燕飞,李宗良.胶清胶生产曝气吹脱法除氨初探[J].热带农业科学,2010,30(3):6-9.Li Yanfei,Li Zongliang.Ammonia stripping in skin rubber production using aeration tanks[J].Chinese Journal of Tropical Agriculture,2010,30(3):6-9.(in Chinese)
[6]张书江,符史谭.离心式除氨机的制造与使用[J].热带作物研究,1983,4(3):24-25.Zhang Shujiang,Fu Shitan.Manufacture and use of centrifuge ammonia removal machine[J].Research on Tropical Crops,1983,4(3):24-25.(in Chinese)
[7]刘有智.超重力化工过程与技术[M].北京:国防工业出版社,2009.
[8]焦纬洲,刘有智,刘建伟,等.超重力旋转床处理焦化氨氮废水中试研究[J].现代化工,2005,25(s1):257-259.Jiao Weizhou,Liu Youzhi,Liu Jianwei,et al.Pilot study on coking ammonia-nitrogen wastewater by high-gravity rotary bed[J].Modern Chemical Industry,2005,25(s1):257-259.(in Chinese)
[9]桂红星,栗秀萍,李宁,等.波纹丝网与鲍尔环填料超重力胶清脱氨研究[J].广州化工,2017,45(23):105-107.Gui Hongxing,Li Xiuping,Li Ning,et al.Study on removal of ammonia from skim with wave thread packing and pall ring packing by rotating packed bed packed[J].Guangzhou Chemical Industry,2017,45(23):105-107.(in Chinese)
[10]冯世骥.天然浓缩胶生产废水处理初探[J].中国环保产业,2005(10):34-37.Feng Shiji.Preliminary Explanation on Control of Wastewaters Produces by Natural Concentrated Gum[J].China Environmental Protection Industry,2005(10):34-37.(in Chinese)
[11]祁贵生,刘有智,王建伟,等.超重力法吹脱氨氮废水技术应用研究[J].煤化工,2007,35(1):61-63.Qi Guisheng,Liu Youzhi, Wang Jianwei,et al.Stripping ammonia-nitrogen wastewater by high gravity method[J].Coal Chemical Industry,2007,35(1):61-63.(in Chinese)
[12]李志君.天然橡胶的分析与试验[M].北京:中国农业大学出版社,2007.
[13]祁贵生,刘有智,焦纬洲.超重力法脱除气体中硫化氢[J].化工进展,2008,27(9):1404-1407.Qi Guisheng,Liu Youzhi,Jiao Weizhou.Desulfurization by high gravity technology[J].Chemical Industry &Engineering Progress,2008,27(9):1404-1407.(in Chinese)
[14]李云雁,胡传荣.试验设计与数据处理[M].北京:化学工业出版社,2009.
[15]柳来栓,谢国勇,刘有智.旋转填料床处理含氨废水实验研究[J].中北大学学报(自然科学版),2002,23(3):222-225.Liu Laishuan,Xie Guoyong,Liu Youzhi.Experimental study on treatment of ammoniac nitrogen wastewater with rotating packed bed[J].Journal of North China Institute of Technology(Natural Science Edition),2002,23(3):222-225.(in Chinese)
[16]栗秀萍,刘有智,栗继宏,等.超重力连续精馏过程初探[J].现代化工,2008,28(s1):75-79.Li Xiuping,Liu Youzhi,Li Jihong,et al.Preliminary studies on the super gravity continuous distillation[J].Modern Chemical Industry,2008,28(s1):75-79.(in Chinese)
[17]郭强,祁贵生,刘有智,等.新型板式填料旋转床压降性能研究[J].天然气化工:c1化学与化工,2017,42(5):52-56.Guo Qiang,Qi Guisheng,Liu Youzhi,et al.Pressure drop characteristics of a new type plate packing in a rotating packed bed[J].Natural Gas Chemical Industry,2017,42(5):52-56.(in Chinese)