Patent ID: 9358509
Filing Date: 2016-06-07
CPC Classification: B01F

Claim Text:
1. A mixer comprising a mixer unit that includes a stator having a plurality of openings and a rotor disposed on an inner side of the stator and spaced by a first gap away from the stator, wherein said rotor has a rotary shaft and a plurality of agitating blades extending radially from a center of rotation of the rotor; said stator includes a plurality of stator components each having a different peripheral diameter; said rotor is disposed in such a manner that it is spaced by the first gap away from said plurality of stator components; a second gap is formed between a wall surface on a radially outermost end of each of the agitating blades and an inner peripheral wall surface of the stator; and said stator components and said rotor are configured such that the first gap between the stator components and the rotor can be changed while the rotor is being rotated so that the stator components and the rotor can be brought closer to or farther away from each other in the direction in which the rotary shaft of said rotor extends; wherein the mixer is so designed by using Equation 1 below to estimate the running time of said mixer and the resulting liquid drop diameters of the fluid being processed that can be obtained during the mixer's running time that the liquid drop diameters of the fluid being processed can be obtained during the particular mixer running time when said mixer is used to subject the fluid being processed to the emulsification, dispersion, particle size breakup or any other mixing processing: In the Equation 1, ε a : Total energy dissipation rate (m 2 /s 3 ) ε g : Local shear stress in the gap between the rotor and stator (m 2 /s 3 ) ε s : Local energy dissipation rate in the stator (m 2 /s 3 ) N p : Number of powers (-) Nqd: Number of flow rates (-) n r : Number of rotor blades (-) D: Diameter of rotor (m) b: Thickness of rotor blade tip (m) δ: Gap between rotor and stator (m) n s : Number of stator holes (-) d: Diameter of stator hole (m) l: Thickness of stator (m) N: Number of rotations (1/s) t m : Mixing time (s) V: Flow rate (m 3 ) K g : Configuration dependent term (m 2 ) K s Configuration dependent term in stator (m 2 ) K c : Configuration dependent term for the entire mixer; wherein liquid being processed is introduced into a portion between said stator components and said rotor which is located on the inner side of each of said stator components and is spaced by the first gap away from each of said stator components.