跳至主要内容

Mass Transfer in a Centrifugal Turbine Agitator-Pump

Read  full  paper  at:
http://www.scirp.org/journal/PaperInformation.aspx?PaperID=45304#.VL3_FizQrzE

Author(s)  

ABSTRACT
This article is a continuation of the research, centering on a vacuum-filtration system, which is designed to reduce the concentration of calcium in water; a process is also known as—water softening. The problem of solving the concentration distribution of the initial (embryonic) particles of CaCO3-particles, which were introduced into the limited volume of the apparatus with a turbine agitator-pump, is addressed through the use of diffusion and deterministic-stochastic models of mass transfer. The solution of the extreme problem allows determining the most important process parameters, such as time of dispersions homogenization and the dispersion mass flow rate to the surface of a special filter. For these parameters a comparative analysis of the adequacy of the theory was found through experiments, performed in the study. We found that uniform distribution of concentrations along the height of the apparatus is achieved by the angular velocity of the rotation 400 rpm for the turbine with 6 - 7 blades at the time of homogenization 14s. In this case, the dispersion mass flow to the surface of the cylindrical filter is 3 50 mg/s at an average concentration of the introduced CaCO3 particles, which is equal to 10 g/L. We determined that the accuracy of the results depends on: the coordinates of the material input in the apparatus volume, the surface shape of the filter and the volumetric flow rate of the liquid (water), being discarded by the turbine blades in the normal direction to their surface.
Cite this paper
Katz, V. and Mazor, G. (2014) Mass Transfer in a Centrifugal Turbine Agitator-Pump. Journal of Water Resource and Protection, 6, 463-472. doi: 10.4236/jwarp.2014.65046.
 
References
[1]Oren, V.K. and Daltorphe, N. (2001) Improved Compact Accelerated Precipitation Softening. A Pretreatment for Membrane Processes. Ben-Gurion University of the Negev, Institute for Applied Research, Beer-Sheva, Israel.
 
[2]Katz, V.Y. and Mazor, G. (2011) Hydrodynamics of a Centrifugal Turbine Agitator-Pump. Russian Journal of Applied Chemistry, Modeling and Calculation of Technological Processes, 84, 1655-1669. http://dx.doi.org/10.1134/S1070427211090345
 
[3]Katz, V.Y. and Mazor, G. (2013) Hydrodynamics and Mass Transfer in a Turbine Pump-Mixer. Proceedings of XXVI International Scientific Conference on Mathemati-cal Methods in Technique and Technologies-MMTT-26, May 27-30, 2013, N. Novgorod State Technical University named after Alekseev, N. Novgorod, Russia.
 
[4]Tikhonov, V.I. and Mironov, M.A. (1977) Markov Processes. Soviet Radio.
 
[5]Chandrasekhar, S. (1947) Stochastic Problems in Physics and Astronomy. Moscow.
 
[6]Landau, L.D. and Lifshitz, E.M. (1988) Theoretical Physics: A Training Manual, Vol. 6, Hydrodynamics. 4th Edition, Science, Moscow.
 
[7]Katz, V.Y. (1990) Doctoral Sci. (Tech.) Dissertation. KKhTI, Kazan.
 
[8]Kutepov, A.M. (1987) Stochastic Analysis of Hydro-Mecha-Nical Processes of Separation of Heterogeneous Systems. Theoretical Foundations of Chemical Engineering, 21, 147-153.
 
[9]Korn, G. and Korn, T. (1968) Mathematical Handbook for Scientists and Engineers. Translation from English, Moscow.                                                                                                     eww150120lx
标签：

评论

发表评论

此博客中的热门博文

Does Immigration Promote the Investment of the Monopolistic Firm?

In the present paper, we examine the effect of increasing uncertainty of immigrants’ growth on the optimal timing of investment of a firm that has a monopolistic power over the labor market. It is revealed that when the uncertainty of immigrants’ growth is more than a threshold level, increasing uncertainty of immigrants’ growth accelerates the optimal timing of firms’ investment and enhances the economic growth, even if the uncertainty of immigrants’ growth is formulated by the geometric Brownian motion, which is in sharp contrast to the standard result that an increase in the uncertainty postpones the optimal timing. With an increase in the immigrants over the past ten years, workforces in the host countries have been growing significantly to the extent that the immigrants represent 70% of the increase in the workforce in Europe, and 47% in the United States as OECD indicates. In the present paper, we attempted to investigate the effect of increased uncertainty caused by the growi...
发表评论
阅读全文

Education Policy Implementation: A Mechanism for Enhancing Primary Education Development in Zanzibar

Education is one of the fundamental rights of individuals; therefore, the government of a country needs to develop and strengthen educational policy and quality as well as to ensure that everyone has equal access to basic education. The improvement of access and quality of education in the world is becoming as an essential factor in development, whereas the basic education (primary school), is acknowledged as a foundation of the higher educational development for every country. To fulfill this goal, governments introduce several policies and procedures; however, it requires some reforms and participation from the politician, policymakers, and other stakeholders to re-examine educational policy so that it can lead to multiplication and betterment of the reforms. Educational reforms actually focus on accountability. A positive educational development and reform is very challenging and needs more effort and strategy on how to use and utilize the resources effectively as such it can achie...
发表评论
阅读全文