泵轮式混合澄清槽泵轮抽吸高度的变化规律试验研究
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摘要
针对混合澄清室体积分别为4.9、9.8、19.8 L的泵轮式混合澄清槽,采用单相流考察泵轮的抽吸高度。结果表明:泵轮抽吸高度随泵轮转速提高而提高,随泵轮与混合室底间距增大而下降,受料液流量和泵轮叶片后弯角度影响较小。作为混合澄清槽放大规律的一部分,给出了预测泵轮抽吸高度的经验关联式。
The pumping height of pump wheel of mixer-settler with mixing tank volume of 4.9,9.8 and 19.8 L were investigated by single phase flow.The results show that the pumping height increases with increasing of impeller rotation speed and decreases with increasing of distance between the impeller and the mixer chamber bottom.Comparatively,it is little affected by the feeding flow rate and the backward curved angle of the impeller blades.As a part of the scale-up principle of mixer-settler,an empirical correlation predicting the pumping height of the pump-mixer is provided.
The pumping height of pump wheel of mixer-settler with mixing tank volume of 4.9,9.8 and 19.8 L were investigated by single phase flow.The results show that the pumping height increases with increasing of impeller rotation speed and decreases with increasing of distance between the impeller and the mixer chamber bottom.Comparatively,it is little affected by the feeding flow rate and the backward curved angle of the impeller blades.As a part of the scale-up principle of mixer-settler,an empirical correlation predicting the pumping height of the pump-mixer is provided.
引文
[1] 吴秋林,王俊峰,张天祥.核燃料后处理工程溶剂萃取设备[M].北京:中国原子能出版社,2012.
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[13] LADE V G,WANKHEDE P C,RATHOD V K.Removal of tributyl phosphate from aqueous stream in a pilot scale combined air-lift mixer-settler unit:process intensification studies[J].Chemical Engineering & Processing,2015,95:72-79.
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[15] 李洲,李以圭,费维扬.液-液萃取过程和设备[M].北京:原子能出版社,1993.
[2] 付子忠,孙秋法,刘尚勇,等.全逆流混合澄清器的研制与应用[J].湿法冶金,2008,27(2):124-128.
[3] DRAIN F,VINOCHE R,DUHAMET J.40 years of experience with liquid-liquid extraction equipment in the nuclear industry[C]//WM’03 Conference.Tucson:Office of Scientific & Technical Information,2003.
[4] THOMAS J,COLVEN J.Mixer-settler development:operating characteristics of a large-scale mixer-settler[R].Oak Ridge:Technical Information Extension,1956.
[5] REEVE R N,GODFREY J C.Phase inversion during liquid-liquid mixing in continuous flow,pump-mix,agitated tanks[J].Chemical Engineering Research & Design,2002,80(8):864-871.
[6] DRAIN F,BOULLIS B,HUGELMAN D,et al.Extraction process technology for the new reprocessing plants in France and Japan[R].Recod’91.Sendai:s.n.,1991.
[7] 马婷婷,孙津生,王运东.混合澄清槽数值模拟与试验研究进展[J].化工进展,2014,33(4):795-802.
[8] NERE N K,PATWARDHAN A W,JOSHI J B.Liquid-phase mixing in stirred vessels:turbulent flow regime[J].Industrial & Engineering Chemistry Research,2003,42(12):2661-2698.
[9] AMIR K,HOSSEIN A,MONTAZER RAHMATI M M.The effect of sodium dodecyl sulfate on mean drop size in a horizontal mixer-settler extractor[J].Canadian Journal of Chemical Engineering,2010,88(1):101-108.
[10] DESNOYER C,MASBERNAT O,GOURDON C.Experimental study of drop size distributions at high phase ratio in liquid-liquid dispersions[J].Chemical Engineering Science,2003,58(7):1353-1363.
[11] COULALOGLOU C A,TAVLARIDES L L.Drop size distributions and coalescence frequencies of liquid-liquid dispersions in flow vessels[J].AIChE Journal,2010,22(2):289-297.
[12] 章泽甫.动力堆核燃料后处理工学[M].北京:中国原子能出版社,2013.
[13] LADE V G,WANKHEDE P C,RATHOD V K.Removal of tributyl phosphate from aqueous stream in a pilot scale combined air-lift mixer-settler unit:process intensification studies[J].Chemical Engineering & Processing,2015,95:72-79.
[14] SINGH K K,MAHAJANI S M,SHENOY K T,et al.CFD modeling of pilot-scale pump-mixer:single-phase head and powder characteristics[J].Chemical Engineering Science,2007,62(5):1308-1322.
[15] 李洲,李以圭,费维扬.液-液萃取过程和设备[M].北京:原子能出版社,1993.