[1]赵思昆,刘 巍,沙海飞,等.惰性粒子流化床干燥玉米膏的体积传热系数[J].南京理工大学学报(自然科学版),2013,37(04):627.
 Zhao Sikun,Liu Wei,Sha Haifei,et al.Volumetric heat transfer coefficient of drying corn paste in fluidized bed with inert particles[J].Journal of Nanjing University of Science and Technology,2013,37(04):627.
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惰性粒子流化床干燥玉米膏的体积传热系数
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《南京理工大学学报》(自然科学版)[ISSN:1005-9830/CN:32-1397/N]

卷:
37卷
期数:
2013年04期
页码:
627
栏目:
出版日期:
2013-08-31

文章信息/Info

Title:
Volumetric heat transfer coefficient of drying corn paste in fluidized bed with inert particles
作者:
赵思昆1刘 巍2沙海飞3张艳莉2王志祥1
1.中国药科大学 药学院,江苏 南京 210009; 2.南京师范大学 能源与机械工程学院,江苏 南京 210042; 3.南京水利科学研究院,江苏 南京 210029
Author(s):
Zhao Sikun1Liu Wei2Sha Haifei3Zhang Yanli2Wang Zhixiang1
1.School of Pharmacy,China Pharmaceutical University,Nanjing 210009,China; 2.School of Energy and Mechanical Engineering,Nanjing Normal University,Nanjing 210042,China; 3.Nanjing Hydraulic Research Institute,Nanjing 210029,China
关键词:
惰性粒子 流化床 干燥 波纹气分板 玉米膏 体积传热系数
Keywords:
inert particles fluidized bed drying corrugated gas distributor corn paste volumetric heat transfer coefficient
分类号:
TK173
文献标志码:
A
摘要:
为考察及提升玉米膏在惰性粒子流化床中的干燥体积传热系数,在利用现代计算流体动力学模拟技术对床内流场进行初步分析的基础上,改用自设计的新型波纹气分板替代了传统的直孔平板气分板。通过实测体积传热系数与进风速率、进风温度等参数间的对应关系曲线,获知了体积传热系数的若干变化规律。借助极差分析的正交实验设计,开展了体积传热系数的参数影响水平及取值优化研究,并基于因次分析建立了相应的模型表达式。结果发现:体积传热系数随进风速率、进料质量流量或惰性粒子静床高的提高而增大,随惰性粒子粒径的提高而减小,随进风温度的提高而先增大后减小; 另与传统的直孔平板气分板相比,新型波纹气分板将更有助于提升操作的体积传热系数。同时,各参数对体积传热系数的影响作用强弱依次为进风速率>进风温度>惰性粒子静床高>进料质量流量>惰性粒子粒径,且优化工艺组合为进风速率6.5 m/s、进风温度90 ℃、惰性粒子粒径1.5 mm、进料质量流量11.5 g/s及惰性粒子静床高40 mm,对应的体积传热系数可约达2.76 kW/(m3·℃)。此外,构建得到的关联模型也适于体积传热系数的估算,其预测值与实验值吻合良好。
Abstract:
To investigate and improve the volumetric heat transfer coefficient index of drying corn paste in fluidized bed with inert particles,the flow field in bed is preliminarily analyzed by means of the modern simulation technique of computational fluid dynamics,and as a result,a novel corrugated gas distributor designed in our lab is recommended to replace the traditional flat plate distributor with a straight hole structure.The relative change laws concerning the volumetric heat transfer coefficient are acquired and summarized by testing the effect relationship curves of volumetric heat transfer coefficient with respect to gas intake rate,gas intake temperature and etc.Based on the orthogonal experiment design with range analysis,the effect degrees of different operational factors on volumetric heat transfer coefficient are discussed and the relevant parameter optimization work is performed,and a calculation formula of volumetric heat transfer coefficient is subsequently constructed via dimensional analysis.The study results show:the volumetric heat transfer coefficient increases with the increase of gas intake rate,feed mass flow or inert particle static bed height,and decreases with the increase of inert particle diameter,and increases firstly and decreases later with the increase of gas intake temperature.Moreover,compared with the traditional flat plate distributor,the novel corrugated gas distributor can bring higher volumetric heat transfer coefficient.Meanwhile,the effect degree order of operational factors on volumetric heat transfer coefficient is gas intake rate>gas intake temperature>inert particle static bed height>feed mass flow>inert particle diameter,and the optimum technological combination is gas intake rate at 6.5 m/s,gas intake temperature at 90 ℃,inert particle diameter at 1.5 mm,feed mass flow at 11.5 g/s and inert particle static bed height at 40 mm,while the value of volumetric heat transfer coefficient can reach about 2.76 kW/(m3·℃).Besides,the constructed correlation formula is also suitable for the calculation and estimation of volumetric heat transfer coefficient,and its predicting values are in good agreement with the experimental data.

参考文献/References:

[1] 潘永康,王喜忠,刘相东,等.现代干燥技术[M].2版.北京:化学工业出版社,2007.
[2]Costa Jr E F,Freire F B,Freire J T,et al.Spouted beds of inert particles for drying suspension[J].Drying Technology,2006,24(3):315-325.
[3]朱学军,吕芹,叶世超.惰性粒子振动流化床中膏状物料干燥[J].化工学报,2007,58(7):1663-1669.
Zhu Xuejun,Lu Qin,Ye Shichao.Drying of paste materials in vibrated fluidized bed with inert particles[J].Journal of Chemical Industry and Engineering,2007,58(7):1663-1669.
[4]陈国桓,张健飞,刘雁,等.膏状物料在惰性粒子流化床中的干燥试验研究[J].化工机械,1997,24(5):254-257.
Chen Guohuan,Zhang Jianfei,Liu Yan,et al.Experimental investigation of drying paste-like materials in an inert particle fluidized bed[J].Chemical Engineering & Machinery,1997,24(5):254-257.
[5]Nesrin K L,Serpil S,Gulum S.Physical properties of parboiled wheat and bulgur produced using spouted bed and microwave assisted spouted bed drying[J].Journal of Food Engineering,2010,98(2):159-169.
[6]Özbey M,Söylemez M S.Effect of swirling flow on fluidized bed drying of wheat grains[J].Energy Conversion and Management,2005,46(9-10):1495-1512.
[7]杨小静,刘春元.流化床干燥玉米的理论及试验结果分析[J].河北工业大学学报,2003,32(1):90-93.
Yang Xiaojing,Liu Chunyuan.The theoretical and experimental analysis on dried corn in a fluidized bed dryer[J].Journal of Hebei University of Technology,2003,32(1):90-93.
[8]尹磊昌,王相友,杨文.玉米脉动流化干燥数学模型的建立与验证[J].农业工程学报,2007,23(10):251-255.
Yin Leichang,Wang Xiangyou,Yang Wen.Modeling of drying corn in pulsed fluidized bed and test validation[J].Transactions of the Chinese Society of Agricultural Engineering,2007,23(10):251-255.
[9]Hatamipour M S,Mowla D.Drying behavior of maize and green peas immersed in fluidized bed of inert energy carrier particles[J].Food and Bioproducts Processing,2006,84(3):220-226.
[10]刘巍,张艳莉,沙海飞,等.CFD模拟与流化床气体分布板的结构设计[J].计算机与应用化学,2010,27(3):415-419.
Liu Wei,Zhang Yanli,Sha Haifei,et al.CFD modeling and structure design of gas distributor for fluidized bed[J].Computers and Applied Chemistry,2010,27(3):415-419.
[11]刘巍,高文义,杨松祥,等.装载新型波纹气分板流化床的干燥强度研究[J].南京理工大学学报,2010,34(6):818-820.
Liu Wei,Gao Wenyi,Yang Songxiang,et al.Drying intensity of fluidized bed with novel corrugated gas distributor[J].Journal of Nanjing University of Science and Technology,2010,34(6):818-820.
[12]刘巍,汤文成.气体分布板开孔结构对流化床干燥性能的影响[J].中国工程科学,2006,8(2):47-50.
Liu Wei,Tang Wencheng.Effects of structure of opening hole in gas distributor on drying property for fluidized bed drier[J].Engineering Science,2006,8(2):47-50.
[13]刘巍,李建国,马骏,等.洗衣粉悬浮液在惰性粒子流化床中干燥的研究[J].日用化学工业,2005,35(6):353-356.
Liu Wei,Li Jianguo,Ma Jun,et al.Study of drying of detergent slurry in fluidized bed of inert particles[J].China Surfactant Detergent & Cosmetics,2005,35(6):353-356.
[14]赵思昆,刘巍,高文义,等.波纹气分板流化床干燥玉米膏的热效率[J].南京理工大学学报,2012,36(1):147-151.
Zhao Sikun,Liu Wei,Gao Wenyi,et al.Heat efficiency of drying corn paste in fluidized bed with corrugated gas distributor[J].Journal of Nanjing University of Science and Technology,2012,36(1):147-151.
[15]Depypere F,Pieters J G,Dewettinck K.CFD analysis of air distribution in fluidised bed equipment[J].Powder Technology,2004,145(3):176-189.
[16]杨富军,王嘉骏,顾雪萍,等.D类颗粒节涌流态化的实验和数值模拟[J].过程工程学报,2005,5(6):597-600.
Yang Fujun,Wang Jiajun,Gu Xueping,et al.Experiment and numerical simulation on slug fluidization of geldart D particles[J].Chinese Journal of Process Engineering,2005,5(6):597-600.
[17]Ormos Z,Szentmarjay T.Economic considerations in fluidized bed drying of pastes using inert particles[J].Drying Technology,1987,5(4):577-591.
[18]Grbavcic Z B,Arsenijevic Z L,Garic-Grulovic R V.Drying of slurries in fluidized bed of inert particles[J].Drying Technology,2004,22(8):1793-1812.
[19]姚玉英,陈常贵,刘邦孚,等.化工原理-上册(修订版)[M].天津:天津科学技术出版社,2004.

相似文献/References:

[1]赵思昆,刘巍,高文义,等.波纹气分板流化床干燥玉米膏的热效率[J].南京理工大学学报(自然科学版),2012,36(01):147.
 ZHAO Si-kun,LIU Wei,GAO Wen-yi,et al.Heat Efficiency of Drying Corn Paste in Fluidized Bed with Corrugated Gas Distributor[J].Journal of Nanjing University of Science and Technology,2012,36(04):147.
[2]刘巍,高文义,杨松祥,等.装载新型波纹气分板流化床的干燥强度研究[J].南京理工大学学报(自然科学版),2010,(06):818.
 LIU Wei,GAO Wen-yi,YANG Song-xiang,et al.Drying Intensity of Fluidized Bed with Novel Corrugated Gas Distributor[J].Journal of Nanjing University of Science and Technology,2010,(04):818.
[3]刘 巍,y,李建国,等.惰性粒子流化床干燥器中干燥强度的关联模型[J].南京理工大学学报(自然科学版),2005,(06):705.
 LIU Wei~.Correlation Formula of Drying Intensity for Inert Particles Fluidized Bed Drier[J].Journal of Nanjing University of Science and Technology,2005,(04):705.

备注/Memo

备注/Memo:
收稿日期:2011-12-04 修回日期:2012-05-09
基金项目:中央高校基本科研业务费专项资金(JKQ2011022); 江苏省自然科学基金(BK2012763)
作者简介:赵思昆(1983-),男,博士生,主要研究方向:制药干燥分离技术,E-mail:nsdlw@sohu.com; 通讯作者:王志祥(1966-),男,博士,教授,博士生导师,主要研究方向:制药分离工程和中药现代化工程技术,E-mail:chinawzx@sohu.com。
更新日期/Last Update: 2013-08-31