Effect of turbulence generator structures to the performance of medium-consistency pump at high rotation speed excesses 2000 rpm
Abstract
The medium-consistency (MC) pump is the key unit in modern pulp and paper industry, especially in medium-consistency bleaching plant. Use of MC pump improves the efficiency of bleaching sequences and reduces the pollution load of bleaching effluents. In this work, the component of MC pump, e. g. turbulence generators with three typical structures were studied to evaluate the effects of turbulence generator structure on the performance of MC pump. An automatic control system was built to control operation condition and to collect data online. Head and efficiency were calculated to evaluate the differences among three turbulence generators. The results showed that the linear-type, twist-type and screw-type turbulence generators exhibited similar performance (pump head and efficiency) of MC pump at high rotation speed (2000 rpm to 2900 rpm) compared to the well-known performance of MC pump at rotation speed lower than 2000 rpm which are significant different for the three turbulence generators.
Award Identifier / Grant number: 2014ZX07213001
Award Identifier / Grant number: 2017ZX07402004
Funding source: State Key Laboratory of Pulp and Paper Engineering
Award Identifier / Grant number: 201714
Award Identifier / Grant number: 201831
Funding source: Natural Science Foundation of Guangdong Province
Award Identifier / Grant number: 2018A030313211
Funding statement: The authors are grateful for the support of the China Major Science and Technology Program for Water Pollution Control and Treatment (2014ZX07213001 and 2017ZX07402004), Project of National Engineering Research Center for Efficient Utilization of Plant Fiber Resources (2017B090903003), State Key Laboratory of Pulp and Paper Engineering (201714 and 201831), Guangdong Provincial Special Support Plan for High-Level Talent Cultivation (2014TQ01N603), Guangdong Provincial Natural Science Foundation Project (2018A030313211), Guangzhou Special Support Program (2014TQ01N603), Science and Technology Plan Projects of Guangzhou city (201504010013 and 201707020011).
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Conflict of interest: The authors declare no conflicts of interest.
References
Cao, S. L., Oba, R. (1998) Performance study of medium-consistency-centrifugal stock pumps. J. Tsinghua Univ. (Sci. Technol.) 38:5–9.Search in Google Scholar
Chen, K. F., Li, J. (2007) Fundamentals and practice of clean bleaching technology for medium-consistency pulp. J. South China Univ. Technol. (Nat. Sci.) 35(10):1–6.Search in Google Scholar
Chen, Q. F., Chen, K. F., Yang, R. D. (2006) Study on the structure of turbulent generator of MC centrifugal pump based on CFD. China Pulp Pap. 25(10):25–27.Search in Google Scholar
Chen, Q. F., Chen, K. F., Yang, R. D., Li, J. (2003) Study on the fluidized characters of medium-consistency pulp suspensions. Trans. China Pulp Pap. 18(2):148–150.Search in Google Scholar
Gullichsen, J., Härkönen, E. (1981) Medium consistency technology. II. storage dischargers and centrifugal pumps. Tappi J. 64(9):113–116.Search in Google Scholar
Höglund, R., Jansson, U. (1993) Apparatus for fluidizing, degassing and pumping a suspension of fibrous cellulose material. U.S. Patent No. 5,209,641.Search in Google Scholar
Höglund, R., Jansson, U. (1997) Pump for pumping fibrous pulp suspension. U.S. Patent No. 5,615,997.Search in Google Scholar
Irish, H. A. (2001) Flow directing device for a medium consistency pump. U.S. Patent No. 6,210,105.Search in Google Scholar
Kerekes, R. J., Soszynski, R. M., Doo, T. (1985) The flocculation of pulp fibres. In: Transactions of the Eighth Fundamental Research Symposium. Oxford, England. pp. 265–309.10.15376/frc.1985.1.265Search in Google Scholar
Li, H., Geng, W. H., Fang, J. G., Zhang, W. Y. (2008) Experiment of centrifugal medium-concentration pump. China Pulp Pap. 27(2):71–72.Search in Google Scholar
Li, H., Ye, D., Zou, C. H., Xue, Z. K. (2015a) Numerical investigation of degas performance on impeller of medium-consistency pump. Adv. Mech. Eng. 7(12):1–9.10.1177/1687814015620322Search in Google Scholar
Li, H., Zhang, H. F., Jiang, B., Fu, Z. Y. (2014) Design of turbulence generator of medium consistency pulp pump. Fluid Mach. 42(2):14–19.10.1155/2012/413674Search in Google Scholar
Li, H., Zhuang, H. F., Geng, W. H. (2012) Design of a turbulence generator of medium consistency pulp pumps. Int. J. Rotating Mach. 2012:1–7.10.1155/2012/413674Search in Google Scholar
Li, J., Chen, K. F. (1996) Fluidization of medium-concentrated kenaf pulp and groundwood pulp. Guangdong Pap. 1:26–30.Search in Google Scholar
Li, R. R., Xu, G. H., Fan, L. J., Zhu, X. Y., Hu, H. J. (2017) The design and performance test of helical blade turbulence generator for medium consistency pumps. China Pulp Pap. Ind. 38(24):60–63.Search in Google Scholar
Li, Z. (2016) Study on the turbulence generator structure and operating performance of medium consistency pump. PhD thesis, School of light industry and engineering, South China University of Technology, Guangzhou, China.Search in Google Scholar
Li, Z., Li, J., Xu, J., Mo, L. H. (2015b) Clean bleaching engineering practice for bagasse pulp: totally chlorine-free and elemental chlorine-free bleaching realized with the same production line. BioResources 10(2):2667–2680.10.15376/biores.10.2.2667-2680Search in Google Scholar
Li, Z., Li, J., Xu, J., Mo, L. H. (2016a) The structure design on turbulence generator of medium consistency pumps. China Pulp Pap. Ind. 37(16):14–20.Search in Google Scholar
Li, Z., Li, J., Xu, J., Mo, L. H., Feng, Y. C., Chen, K. F. (2016b) The fluidization properties of bagasse pulp suspensions in a rotary device. BioResources 11(1):2629–2639.10.15376/biores.11.1.2629-2639Search in Google Scholar
Lindsay, J. D., Ghiaasiaan, S. M., Abdel-Khalik, S. I. (1995) Macroscopic flow structures in a bubbling paper pulp-water slurry. Ind. Eng. Chem. Res. 34(10):3342–3354.10.1021/ie00037a021Search in Google Scholar
Lindsay, J. D., Gullichsen, J. (1995) Pulp pumping and hydraulics. In: Pulp Bleaching: Principles and Practice IPST. Tappi Press. Paper No. 562.Search in Google Scholar
Ma, X. D. (2014) Design and experimental study on medium consistency pump. PhD thesis, Institute of process equipment, Zhejiang University, Paper No. Y2559227, Hangzhou, China.Search in Google Scholar
Ma, X. D., Li, Z. F., Hu, H., Wu, D. Z., Wang, L. Q. (2013a) Experimental study on a medium consistency pump. J. Fluids Eng. 135(10):104503.10.1115/1.4024865Search in Google Scholar
Ma, X. D., Wu, D. Z., Huang, D. S., Yu, H., Wang, L. Q. (2013b) CFD analysis on a turbulence generator of medium consistency pump. In: IOP Conf. Ser.: Mater. Sci. Eng., The 6th international conference on pumps and fans with compressors and wind turbines (ICPF2013). Tsinghua University, Beijing, China. Paper No. 032003.10.1088/1757-899X/52/3/032003Search in Google Scholar
Ragnar, M., Dahllof, H., Lundgren, S. (2005) Towards environmentally sustainable bleaching of kraft pulp-evaluating the possible role of ozone. Appita J. 58(6):475–480.Search in Google Scholar
Schmid, C. F., Switzer, L. H., Klingenberg, D. J. (2000) Simulations of fiber flocculation: effects of fiber properties and interfiber friction. J. Rheol. 44(4):781–809.10.1122/1.551116Search in Google Scholar
Sixta, H., Goetzinger, G., Schrittwieser, A., Hendel, P. (1991) Medium consistency ozone bleaching: laboratory and mill experience. Papier 45(10):610–625.Search in Google Scholar
Soszynski, R. M., Kerekes, R. J. (1988) Elastic interlocking of nylon fibres suspended in liquid. Part 2. process of interlocking. Nord. Pulp Pap. Res. J. 3(4):180–184.10.3183/npprj-1988-03-04-p180-184Search in Google Scholar
Teng, G., Li, H., Geng, W. H., Yan, J. H. (2010) A method of calculating the radius of a three-vane turbulence generator. Mod. Manuf. Technol. Equip. 6:10–12.Search in Google Scholar
Timperi, J., Vesala, R., Vikman, V. (1989) Fluidizing centrifugal pump. U.S. Patent No. 4,877,368.Search in Google Scholar
Ye, D. X. (2015) Turbulence generator inner flow and experimental study on medium consistency pump. PhD thesis, School of energy and power engineering, Jiangsu University, Paper No. 10299B1211007, Zhenjiang, China.Search in Google Scholar
Ye, D. X., Lai, X. D., Li, H., Zhang, X. (2018) Optimal design and experiment of exhaust vent on impeller of medium consistency pulp pump. Adv. Mech. Eng. 10(3):1–9.10.1177/1687814018765557Search in Google Scholar
Ye, D. X., Li, H. (2017) Study on performance characteristic of medium consistency pump. Adv. Mech. Eng. 9(3):1–13.10.1177/1687814017691892Search in Google Scholar
Ye, D. X., Li, H., Zhuang, H. F., Tang, P., Zou, C. H. (2015) Design and experiment on turbulence generator of medium consistency pump. J. Irrig. Drain. Eng. 33(11):921–925.Search in Google Scholar
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Articles in the same Issue
- Frontmatter
- Review paper
- On the development of the refiner mechanical pulping process – a review
- Bleaching
- Oxalate formation during ClO2 bleaching of bamboo kraft pulp
- Mechanical pulping
- Defibration mechanisms and energy consumption in the grinding zone – a lab scale equipment and method to evaluate groundwood pulping tools
- Paper technology
- Insight into fractionation performance of American old corrugated containers pulp in pressure screening
- Comprehensive utilization of Ganoderma lucidum residues in papermaking
- Effect of turbulence generator structures to the performance of medium-consistency pump at high rotation speed excesses 2000 rpm
- Mechanical properties of low-density paper
- Determination of relative solids concentration in homogeneous dual component pulp-filler suspension by multi-spectrophotometer
- Paper physics
- Surface characterization of paper and paperboard using a stylus contact method
- Paper chemistry
- Filler modified by a sequential encapsulation and preflocculation method and its effect on paper properties
- Significant contribution of fibrils on pulp fiber surface to water retention value
- Impregnation of paper with cellulose nanofibrils and polyvinyl alcohol to enhance durability
- Printing
- Vibration measurements of paper prints and the data analysis
- Predicting inkjet dot spreading and print through from liquid penetration- and picoliter contact angle measurement
- Environmental impact
- Hydrophobic cellulose aerogel from waste napkin paper for oil sorption applications
- A comparative study of an anaerobic-oxic (AO) system and a sequencing batch biofilm reactor (SBBR) in coating wastewater treatment and their microbial communities
- Acknowledgment
- Acknowledgment
Articles in the same Issue
- Frontmatter
- Review paper
- On the development of the refiner mechanical pulping process – a review
- Bleaching
- Oxalate formation during ClO2 bleaching of bamboo kraft pulp
- Mechanical pulping
- Defibration mechanisms and energy consumption in the grinding zone – a lab scale equipment and method to evaluate groundwood pulping tools
- Paper technology
- Insight into fractionation performance of American old corrugated containers pulp in pressure screening
- Comprehensive utilization of Ganoderma lucidum residues in papermaking
- Effect of turbulence generator structures to the performance of medium-consistency pump at high rotation speed excesses 2000 rpm
- Mechanical properties of low-density paper
- Determination of relative solids concentration in homogeneous dual component pulp-filler suspension by multi-spectrophotometer
- Paper physics
- Surface characterization of paper and paperboard using a stylus contact method
- Paper chemistry
- Filler modified by a sequential encapsulation and preflocculation method and its effect on paper properties
- Significant contribution of fibrils on pulp fiber surface to water retention value
- Impregnation of paper with cellulose nanofibrils and polyvinyl alcohol to enhance durability
- Printing
- Vibration measurements of paper prints and the data analysis
- Predicting inkjet dot spreading and print through from liquid penetration- and picoliter contact angle measurement
- Environmental impact
- Hydrophobic cellulose aerogel from waste napkin paper for oil sorption applications
- A comparative study of an anaerobic-oxic (AO) system and a sequencing batch biofilm reactor (SBBR) in coating wastewater treatment and their microbial communities
- Acknowledgment
- Acknowledgment