磁化甘蔗汁微滤膜分离过程的膜通量预测模型  

Non-dimensional mathematical model of magnetized sugarcane juice by micro-filtration membrane separation

作　　者：马森[1] 高俊永[2] 

机构地区：[1]河南工业大学粮油与食品学院,郑州450001 [2]广州甘蔗糖业研究所,广东省甘蔗改良与生物炼制重点实验室,广州510316

出　　处：《农业工程学报》2015年第6期333-337,共5页Transactions of the Chinese Society of Agricultural Engineering

基　　金：国家自然科学基金项目(31301594);河南工业大学"省属高校基本科研业务费专项资金"项目(2014YWQQ02);河南工业大学高层次人才基金(2012BS031)

摘　　要：为模拟磁化甘蔗汁微滤膜分离过程,建立了磁化微滤膜分离过程的的膜通量的无量纲数学模型。该研究以磁场、微滤膜器和膜管的参数、微滤膜的操作条件和料液的流体力学性质为影响因素,根据π定理,因次一致性和流动相似理论建立了磁化微滤膜操作过程的膜通量的无量纲模型,并以甘蔗混合汁为原料进行了模型的求解与验证。结果表明:关于磁化甘蔗混合汁微滤过程所建立的多元回归模型的决定系数R2值为0.905,标准误差为0.173,模型精度较高。该模型可预测膜器条件、操作条件和磁场强度等参数条件下的磁化糖汁微滤膜分离过程的膜通量,为磁化陶瓷微滤膜装置的设计和操作工艺条件的确定提供了简便的计算方法。The physical properties of liquid and the filtration performance of membrane was easily modified by the magnetization process. It meant that the process of membrane separation was difficult to be analyzed because of applying the magnetic field technology. It was also hard to make clear the relationships of all the influence factors just by a simple mathematical derivation, so a suitable non-dimensional mathematical model of membrane flux was used, in order to simulate the separation process of micro-filtration membrane for the magnetized mixed sugarcane juice. The parameters of micro-filtration membrane, operating conditions and flow characteristics of feed liquid were chosen as the main factors in this process, and mathematical statistics were done aiming at the involved parameters and dimensions. A non-dimensional mathematical model was established according to the π theorem, the dimensional consistency principle and the hydromechanics affinity theory. The results showed that the non-dimensional mathematical model mainly consisted of three important dimensionless parameters. The first one was Reynolds number, which represents the characteristics of fluid during the operating process. The second one was Euler number, which represents the characteristics of micro-filtration membrane. The last one was a new Sy number, which shows the group of dimensionless factors associated with physical property parameters of liquid and intensity of magnetic field. In order to verify the accuracy and the practicability of the model, the mixed sugarcane juice was used as a raw material for solving the non-dimensional mathematical model. The magnetic field intensities of 0.1, 0.2, 0.3 and 0.4 T were applied to deal with the mixed sugarcane juice, and the total reflux experiments were used in the process. The membrane flux was determined under the changed conditions of pressure difference between inlet and outlet of membrane, and flow rate, brix and viscosity of feed liquid. All of these parameters and membrane flux were calculate

关 键 词：分离 膜 模型 磁化 甘蔗混合汁 陶瓷微滤膜 π定理 

分 类 号：TQ028[化学工程]