互补式布浆器分布特性影响因素的实验研究
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摘要
采用互补式布浆方法,利用简化设计法设计了互补式布浆器。通过实验研究了不同回流比、布浆总管内浆料质量流量波动、3种混合室结构下互补式布浆器的布浆性能。结果表明,回流比分别为8%、10%、12%、15%时,混合室出口的浆料质量流量分布曲线与期望值非常接近,最大偏差仅为0. 37%。两个布浆总管浆料质量流量不相等时,浆料分布的均匀性变差,随着浆料质量流量波动的加大,支管的浆料质量流量偏差显著增加。不同混合室结构内浆料的混合效果差异较大,3种结构混合室支管浆料质量流量的最大偏差分别为-0. 342%、-0. 285%、0. 258%,多腔混合室好于单腔混合室。
The distributor based on complementary distribution was designed by simplified design method. Distribution characteristic of complementary distributor was experimentally studied under different reflux ratio,fluctuation of flowed rate in the rectangular tapered distributors,different structure of mixing chambers. The results showed that when reflux ratio varied from 8%,10%,12% to 15%,distribution of mass flow rate out of mixing chamber was very closed to the expected values curve. The maximum deviation of mass flow rate was only 0. 37%.When inlet amounts of two rectangular tapered distributors were not equal,uniformity of pulp distribution became worse. With increase of fluctuation of mass flow rate,deviation of mass flow rate of branch pipe increased significantly. The mixing effect of pulp in different mixing chamber structures was quite different. The maximum deviation of flow rate of branch pipe in the three structure mixing chambers were only-0. 342%,-0. 285%,0. 258% respectively.
The distributor based on complementary distribution was designed by simplified design method. Distribution characteristic of complementary distributor was experimentally studied under different reflux ratio,fluctuation of flowed rate in the rectangular tapered distributors,different structure of mixing chambers. The results showed that when reflux ratio varied from 8%,10%,12% to 15%,distribution of mass flow rate out of mixing chamber was very closed to the expected values curve. The maximum deviation of mass flow rate was only 0. 37%.When inlet amounts of two rectangular tapered distributors were not equal,uniformity of pulp distribution became worse. With increase of fluctuation of mass flow rate,deviation of mass flow rate of branch pipe increased significantly. The mixing effect of pulp in different mixing chamber structures was quite different. The maximum deviation of flow rate of branch pipe in the three structure mixing chambers were only-0. 342%,-0. 285%,0. 258% respectively.
引文
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[10] Wang Haichen,Hou Shunli,Lin Xiaolin. Structural Analysis andSimulation of a Non-Reflux Adjustable Pulp Distributor[J]. Paperand Paper Making,2015,34(8):5.王海琛,侯顺利,林晓林.无回流可调布浆器的结构计算及模拟分析[J].纸和造纸,2015,34(8):5.
[11] Hou Shunli,Wei Wei,Yang Heng,et al. An exploratory study ontapered pulp distributor with multi-slit[J]. China Pulp&Paper In-dustry,2018,39(6):22.侯顺利,卫魏,杨恒,等.无回流缝型锥管布浆器的局部调节性能研究[J].中华纸业,2018,39(6):22.
[12] Hamalainen J,Hamalainen T. Mathematics in paper-from fiber sus-pension fluid dynamics to solid state paper mechanics[J]. Journal ofMathematics in Industry,2014,4(4):454.
[13] LIU W,CHEN K F. Distributing Mechanism and Flow Characteris-tic of New Distributor[J]. CIESC. Journal,2012,63(2):448.刘伟,陈克复.新型布浆器的布浆机理及流动特性[J].化工学报,2012,63(2):448.
[14] LIU W. Study on Pulp Distribution Technology and Distributor ofModern Paper-making Machine Based on CFD[D]. Guangzhou:South China University of Technology,2013.刘伟.基于CFD的现代造纸机布浆技术与布浆器的研究[D].广州:华南理工大学,2013.
[15] LIU W. Flow Characteristic of Hydraulic Headbox Based on Comple-mentary Pulp Distribution[J]. The Open Mechanical EngineeringJournal,2015,9(9):613.
[16] KANG G B. Study on the Mechanism of Hydraulic Headbox KeyTechnology and Application of CFD[D]. Guangzhou:South ChinaUniversity of Technology,2011.康国兵.水力式流浆箱关键技术机理研究与CFD应用[D].广州:华南理工大学,2011.
[17] LIU W,CHEN K F,LI J. Numerical Simulation on the Flow Char-acteristic in Rectangular Tapered Distributor[J]. Journal of SouthChina University of Technology,2011,39(3):13.刘伟,陈克复,李军.方形锥管布浆器流动特性的数值模拟[J].华南理工大学学报,2011,39(3):13.
[18] LIU W,JI X H. Study on Structure of Mixing Chamber in New PulpDistributor Based on CFD[J]. Chemical Industry and Engineer Pro-gress,2014,33(6):1413.刘伟,冀晓辉.基于CFD的新型布浆器混合室结构[J].化工进展,2014,33(6):1413.
[2] LIU W,CHEN K F. Research Overview on Distributor of Headbox ofHigh-speed Paper Machine[J]. Paper and Paper Making,2011,30(5):10.刘伟,陈克复.高速纸机流浆箱布浆器技术[J].纸和造纸,2011,30(5):10
[3] YANG Fu-cheng. New Model Distributor for Headbox[J]. WorldPulp and Paper,2005,24(3):46.杨福成.新型流浆箱布浆器[J].国际造纸,2005,24(3):46
[4] CHEN K F. Fluid Dynamic at Wet Section of the Paper Machine[M]. Beijing:China Light Industry Press,1984.陈克复.纸机湿部浆料流体动力学[M].北京:中国轻工业出版社,1984.
[5] YANG Xu,CHEN Kefu,WEN Haiping. Discussion on the WorkingPrinciple of Inlet-header of Headbox and Its New Calculation Method[J]. China Pulp&Paper,2009,28(9):1.杨旭,陈克复,文海平.高速宽幅流浆箱等压布浆器原理及新的计算方法探讨[J].中国造纸,2009,28(9):1
[6] WANG Daowen,YU Yan. Optimazing Design of Headbox TaperedDistributor Based on Matlab[J]. China Pulp&Paper,2006,25(9):23.王道文,于燕.基于Matlab的流浆箱锥形布浆总管的优化设计[J].中国造纸,2006,25(9):23
[7] Liu Xiaodan,Zhang Feng,Wang Sangang. Influence of Constructionand Length of Coupling Tube in Distributor on the Effect of Pulp Dis-tribution[J]. Paper and Paper Making,2015,34(9):11.刘晓丹,张锋,王三刚.过渡管长度及其结构对布浆器布浆效果的影响[J].纸和造纸,2015,34(9):11.
[8] Liu Xiaodan,Zhang Feng,Wang Sangang. The Theoretical Designand Numerical Simulation of Rectangular Tapered Headers[J]. PaperScience&Technology,2016,35(2):57.刘晓丹,张锋,王三刚.布浆器锥形总管理论设计及数值模拟分析[J].造纸科学与技术,2016,35(2):57.
[9] Yang Shuai,Liu Yu,He Jing,et al. Optimizing pulp distributingstructure of orifice plate for uniform fiber flow in tapered dstributor[J]. Journal of Nanjing Forestry University(Natural Sciences Edi-tion),2016,40(6):141.杨帅,刘钰,何晶,等.孔板式锥形布浆器孔口均一性布浆的结构优化[J].南京林业大学学报(自然科学版),2016,40(6):141.
[10] Wang Haichen,Hou Shunli,Lin Xiaolin. Structural Analysis andSimulation of a Non-Reflux Adjustable Pulp Distributor[J]. Paperand Paper Making,2015,34(8):5.王海琛,侯顺利,林晓林.无回流可调布浆器的结构计算及模拟分析[J].纸和造纸,2015,34(8):5.
[11] Hou Shunli,Wei Wei,Yang Heng,et al. An exploratory study ontapered pulp distributor with multi-slit[J]. China Pulp&Paper In-dustry,2018,39(6):22.侯顺利,卫魏,杨恒,等.无回流缝型锥管布浆器的局部调节性能研究[J].中华纸业,2018,39(6):22.
[12] Hamalainen J,Hamalainen T. Mathematics in paper-from fiber sus-pension fluid dynamics to solid state paper mechanics[J]. Journal ofMathematics in Industry,2014,4(4):454.
[13] LIU W,CHEN K F. Distributing Mechanism and Flow Characteris-tic of New Distributor[J]. CIESC. Journal,2012,63(2):448.刘伟,陈克复.新型布浆器的布浆机理及流动特性[J].化工学报,2012,63(2):448.
[14] LIU W. Study on Pulp Distribution Technology and Distributor ofModern Paper-making Machine Based on CFD[D]. Guangzhou:South China University of Technology,2013.刘伟.基于CFD的现代造纸机布浆技术与布浆器的研究[D].广州:华南理工大学,2013.
[15] LIU W. Flow Characteristic of Hydraulic Headbox Based on Comple-mentary Pulp Distribution[J]. The Open Mechanical EngineeringJournal,2015,9(9):613.
[16] KANG G B. Study on the Mechanism of Hydraulic Headbox KeyTechnology and Application of CFD[D]. Guangzhou:South ChinaUniversity of Technology,2011.康国兵.水力式流浆箱关键技术机理研究与CFD应用[D].广州:华南理工大学,2011.
[17] LIU W,CHEN K F,LI J. Numerical Simulation on the Flow Char-acteristic in Rectangular Tapered Distributor[J]. Journal of SouthChina University of Technology,2011,39(3):13.刘伟,陈克复,李军.方形锥管布浆器流动特性的数值模拟[J].华南理工大学学报,2011,39(3):13.
[18] LIU W,JI X H. Study on Structure of Mixing Chamber in New PulpDistributor Based on CFD[J]. Chemical Industry and Engineer Pro-gress,2014,33(6):1413.刘伟,冀晓辉.基于CFD的新型布浆器混合室结构[J].化工进展,2014,33(6):1413.