Abstract
The article discusses the process of high molecular weight flocculant particles dissolving in water during mechanical stirring. A procedure of mixer selection taking into account mixer geometry based on the Prandtl’s semi-empirical turbulence model was developed and described. It was found that the choice of the optimal rotation speed is related with the turbulent frictional stress generated by the impeller of the mixer. The results of experimental studies on the preparation of concentrated solutions of high molecular weight cationic flocculant MagnaflokМ 155 using various impeller types are shown. The efficiency of a conical mixer has been confirmed, which makes it possible prepare a flocculant solution 1.3 times faster due to the possibility of mixing at higher rotational speeds with lower power consumption
Highlights
Polymers are applied in different fields of the petroleum industry to increase extraction of oil, prepare drill mud, reinforce borehole walls; they are used to enhance oil recovery to control injected water mobility
In literature and flocculant application practice there is no clear method of mixing device selection for mechanization of the solution preparation process
A graph of velocity gradient du/dy dependence on shear stress was taken from [7];data for 0.3 % flocculant solution with a molecular weight of 5-8 mln were used
Summary
Polymers are applied in different fields of the petroleum industry to increase extraction of oil, prepare drill mud, reinforce borehole walls; they are used to enhance oil recovery to control injected water mobility. A lot of papers are dedicated to the investigation of different flocculant application efficiency [2,3,4]. In literature and flocculant application practice there is no clear method of mixing device selection for mechanization of the solution preparation process. The imperfection of solution preparation methods results in considerable polymer ingress in suspension in the form of a gel and associates, which leads to overconsumption of expensive flocculants and reduction of their efficiency during dispersion aggregation
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