套管式冷冻浓缩装置的研制及其实验研究
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摘要
研制一种新型结构的冷冻浓缩装置,可克服传统界面渐进冷冻浓缩溶质夹带率较高的缺点,且装置的料液处理量适应性好、参数调控方便、无易磨损件.建立了套管式冷冻浓缩装置的数学模型,通过控制温度、流速,对不同工况下结冰速度随料液温度、载能液温度和冰层厚度的变化规律进行了计算分析.研制了R134a套管式冷冻浓缩实验装置,对其工作特性进行了实验研究.结果表明:通过控制料液浓度、料液流速和冰层厚度,可降低溶质夹带率.
A new type of refrigerating concentrator was developed,which has the advantages of good adaptability,convenient parameter regulation and no easy wear. The mathematical model of the casing freezing concentrator was established. Under different working conditions,the changes of the freezing velocity with the temperature of the feed liquid,the temperature of the carrier fliud and the thickness of the ice layer were calculated and analyzed by controlling the temperature and the flow rate. The R134 a casing freezing experimental device was established,and its working characteristics were studied. The results showed that the rate of solute entrainment could be reduced by controlling the liquid concentration,the liquid flow rate and the thickness of the ice.
A new type of refrigerating concentrator was developed,which has the advantages of good adaptability,convenient parameter regulation and no easy wear. The mathematical model of the casing freezing concentrator was established. Under different working conditions,the changes of the freezing velocity with the temperature of the feed liquid,the temperature of the carrier fliud and the thickness of the ice layer were calculated and analyzed by controlling the temperature and the flow rate. The R134 a casing freezing experimental device was established,and its working characteristics were studied. The results showed that the rate of solute entrainment could be reduced by controlling the liquid concentration,the liquid flow rate and the thickness of the ice.
引文
[1]Sahasrabudhe A B,Desai R R,Jabade S K.Moddeling and simulation of a freeze concentration technique for sugarcane juice concentration[J].Applide Mechanics and Materials,2012,110-116:2768-2773.
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[3]Miyawaki O,Liu L,Nakamura K.Effective partition constant of solute between ice and liquid phases in progressive freeze-concentration[J].Journal of Food Science,1998,63(5):756-758.
[4]刘凌.果蔬汁常压低温浓缩新技术:界面渐进冷冻浓缩[J].饮料工业,2001,4(6):35-38.
[5]刘冬雪.冷冻浓缩装置的参数优化与控制研究[D].天津:天津科技大学,2008.
[6]胡涛.转筒式冷冻浓缩装置的结构与调控研究[D].天津:天津科技大学,2009.
[7]饶建平.冷冻浓缩装置的改进与扩大研究[D].福州:福建农林大学,2012.
[8]Nakornsri S,Suntivalakorn R,Thanutwutthigorn K.Performance improvement of tubular-ice making machine by reducing the feed water temperature with shell and tube heat exchanger[J].Applied Mechanics and Materials,2014,564:298-303.
[2]李亚,孙潇,孙卫东.冷冻浓缩技术的应用及研究进展[J].广西轻工业,2008(3):9-10.
[3]Miyawaki O,Liu L,Nakamura K.Effective partition constant of solute between ice and liquid phases in progressive freeze-concentration[J].Journal of Food Science,1998,63(5):756-758.
[4]刘凌.果蔬汁常压低温浓缩新技术:界面渐进冷冻浓缩[J].饮料工业,2001,4(6):35-38.
[5]刘冬雪.冷冻浓缩装置的参数优化与控制研究[D].天津:天津科技大学,2008.
[6]胡涛.转筒式冷冻浓缩装置的结构与调控研究[D].天津:天津科技大学,2009.
[7]饶建平.冷冻浓缩装置的改进与扩大研究[D].福州:福建农林大学,2012.
[8]Nakornsri S,Suntivalakorn R,Thanutwutthigorn K.Performance improvement of tubular-ice making machine by reducing the feed water temperature with shell and tube heat exchanger[J].Applied Mechanics and Materials,2014,564:298-303.