Numberical simulation and experiment verification study on low temperature spray-drying of persimmon pulp
-
摘要: 利用计算机流体力学及算法建立喷雾干燥机结构模型及气体连续相、液滴离散相等数值计算模型,得到柿果浆低温喷雾干燥过程中气相流场、温度场、压力场和颗粒运动轨迹等信息,分析了进风温度和进料速率对喷雾干燥柿粉的水分含量、集粉率和喷雾干燥机出风温度的影响,并将模拟结果与实验结果进行对比。结果表明,水分含量和出风温度的模拟值与实验值接近,且变化规律相同。结合数值模拟和正交实验结果,确定柿果浆最佳低温喷雾干燥工艺参数组合为进风温度388 K、入口进风量0.05 m3/s、进料速率为4.5×10-3L/s,实验集粉率为78.14%。Abstract: The physical model and the numerical model were built to acquire some information on gas flow field, temperature field, pressure field and particle trajectory by the computational fluid dynamics ( CFD) model and algorithm.The effects of inlet temperature and feed rate on the water content of spray drying persimmon, powder recovery and outlet temperature were analyzed. The results showed that the values obtained from numberical simulation were very close to that of the orthogonal experiment. The optimal technical parameters of spray drying persimmon powders were established to be inlet temperature of 388 K, air feed volume of 0.05 m3/ s and feed rate of 4.5 × 10- 3L / s by combination of CFD and orthogonal experiment. Under the optimal conditions, the powder recovery was 78.14%. The results suggested that CFD could be used to simulate the process of spray drying persimmon powder effectively.
-
Keywords:
- Persimmon pulp /
- spray drying /
- numberical simulation /
- experiment verification
-
[1] Nicoleti JF, Silveira V, Telis-Romero J, et al.Influence of drying conditions on ascorbic acid during convective drying of whole persimmons[J].Drying Technology, 2007, 25 (5) :891-899.
[2] Veberic R, Jurhar J, Mikulic-Petkovsek M, et al.Comparative study of primary and secondary metabolites in 11 cultivars of persimmon fruit (Diospyros kaki L.) [J].Food Chemistry, 2010, 119 (2) :477-483.
[3] Benedetti PDECD, Pedro MAM, Telis-Romero J, et al.2011.Influence of encapsulating materials on water sorption isotherms of vacuum-dried persimmon powder[J].Journal of Food Processing and Preservation, 2011, 35 (4) :423-431.
[4] Du J, Ge ZZ, Xu Z, et al.2014.Comparison of the Efficiency of Five Different Drying Carriers on the Spray Drying of Persimmon Pulp Powders[J].Drying Technology, 2014, 32 (10) :1157-1166.
[5] 毕金峰, 陈芹芹, 刘璇, 等.果蔬粉:农产品加工业的新宠[J].农产品加工, 2013, (6) :4-5. [6] Ferrari CC, Germer SPM, de Aguirre JM.Effects of SprayDrying Conditions on the Physicochemical Properties of Blackberry Powder[J].Drying Technology, 2011, 30 (2) :154-163.
[7] Yousefi S, Emam-Djomeh Z, Mousavi SM.Effect of carrier type and spray drying on the physicochemical properties of powdered and reconstituted pomegranate juice (Punica Granatum L.) [J].J Food Sci Technol, 2011, 48 (6) :677-684.
[8] Roustapour OR, Hosseinalipour M, Ghobadian B.An experimental investigation of lime juice drying in a pilot plant spray dryer[J].Drying Technology, 2006, 24 (2) :181-188.
[9] Kuriakose R, Anandharamakrishnan C.Computational fluid dynamics (CFD) applications in spray drying of food products[J].Trends in Food Science&Technology, 2010, 21 (8) :383-398.
[10] Mezhericher M, Levy A, Borde I.Spray drying modelling based on advanced droplet drying kinetics[J].Chemical Engineering and Processing:Process Intensification, 2010, 49 (11) :1205-1213.
[11] 马景林, 韩志萍, 叶剑芝, 等.蜂蜜喷雾干燥过程的模拟与仿真[J].安徽农业科学, 2011, (2) :849-860. [12] 魏新利, 张海红, 王定标.旋风分离器流场的数值计算方法研究[J].郑州大学学报:工学版, 2005, (1) :57-60. [13] 弓志青, 祝清俊, 王文亮, 等.计算流体动力学在喷雾干燥中的应用研究进展[J].粮油食品科技, 2012, 20 (1) :19-21. [14] 杨嘉宁, 赵立杰, 王优杰, 等.计算流体力学在喷雾干燥中的应用[J].中国医药工业杂, 2013, 44 (7) :729-733. [15] 王福军.计算流体动力学分析[M].北京:清华大学出版社, 2004. [16] 孙化鹏.旋风分离器的数值模拟及结构优化研究[D].长沙:长沙理工大学, 2013. [17] 吴望一.流体力学[M].北京:北京大学出版社, 1982. [18] 张丽丽, 周慎杰, 陈举华.气流式喷嘴流体雾化干燥过程的CFD分析[J].计算机仿真, 2008, (12) :329-341. [19] 陈有庆, 胡志超, 胡良龙, 等.喷雾干燥过程的数值模拟[J].农机化研究, 2008, (10) :37-43. [20] Woo MW, Daud WRW, Mujumdar AS, et al.Comparative study of droplet drying models for CFD modelling[J].Chemical Engineering Research and Design, 2008, 86 (9) :1038-1048.
[21] Goula AM, Adamopoulos KG.2010.A new technique for spray drying orange juice concentrate[J].Innovative Food Science&Emerging Technologies, 2010, 11 (2) :342-351.
计量
- 文章访问数:
- HTML全文浏览量:
- PDF下载量:
下载:
