# US 2014/0192614 A1 · Particle size breakup apparatus

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- Number: US 2014/0192614 A1
- Document ID: US20140192614A1
- Status: Published application
- Kind: A1
- Application number: 14/239,565
- Filed: 2012-08-16
- Published: 2014-07-10
- Earliest claimed: 2011-08-19
- Assignees: Meiji Co., Ltd.
- Inventors: Tetsu Kamiya
- Web page: https://patentgrep.com/patent/US20140192614A1

## CPC

- B01F 27/27: Mixers with stator-rotor systems, e.g. with intermeshing teeth or cylinders or having orifices (the stirrers having a central axial inflow and a substantially radial outflow B01F27/81)
- B01F 25/50: Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
- B01F 27/2724: {the relative position of the stator and the rotor, gap in between or gap with the walls being adjustable}
- B01F 27/808: with stirrers driven from the bottom of the receptacle
- B01F 27/812: {the stirrers co-operating with surrounding stators, or with intermeshing stators, e.g. comprising slits, orifices or screens}
- B01F: MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING (mixing paints B44D3/06)

## Abstract

A rotor/stator type mixer implements the particle size breakup apparatus and includes a stator having a plurality of openings formed thereon and a rotor disposed on the inside of the stator and spaced away from the stator with a specific gap. The rotor, which is disposed inwardly of the stator having the plurality of openings formed thereon so that it can be spaced away from the stator with the specific gap, has a rotor peripheral wall that faces opposite the inside of the stator peripheral wall and is disposed inwardly radially of the peripheral wall of the stator having the plurality of openings formed thereon so that it can be spaced away from the stator with the specific gap. In addition, the rotor has a plurality of openings formed thereon.

## Claims

### Claim 1

A rotor/stator type mixer comprising a mixer unit that includes a stator having a plurality of openings formed thereon and a rotor disposed inwardly radially of the stator and spaced away from the stator with a specific gap, wherein the rotor disposed inwardly radially of the stator and spaced away from the stator with the specific gap includes:
a rotor peripheral wall that faces opposite the inside of the peripheral wall of the stator having the plurality of openings formed thereon and is located inwardly radially of the stator with the specific gap; and
a plurality of rotor openings formed on the rotor peripheral wall.

### Claim 2 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the stator includes a plurality of stators each having a different peripheral diameter and wherein the rotor peripheral wall of the rotor disposed inwardly radially of each of the stators is disposed so that it can be spaced away from each of the stators with a respective specific gap.

### Claim 3 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the stator and the rotor are provided so that they can be brought closer to or farther away from each other in the direction in which the rotary shaft of the rotor extends.

### Claim 4 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the stator has an annular cover extending inwardly radially from the edge of the top end edge.

### Claim 5 (depends on 4)

A rotor/stator type mixer as defined in claim 4, wherein the annular cover has an inlet hole through which a fluid being processed can be introduced downwardly.

### Claim 6 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein each of the plurality of openings formed on the stator has a round shape.

### Claim 7 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the plurality of openings formed on the stator represent over 20% of the total peripheral wall of the stator when it is expressed in terms of the opening-to-area ratio.

### Claim 8 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the rotor has a plurality of agitating blades extending radially from the center point of the rotary shaft of the rotor.

### Claim 9 (depends on 1)

A rotor/stator type mixer, wherein the mixer having the construction as defined in claim 1 is designed by calculating the Equation 1 listed below to estimate the mixer's particular running time and the resulting liquid drop diameters of the fluid being processed that are obtained during that mixer's particular running time, the mixer's design being such that it allows the resulting liquid drop diameters of the fluid being processed to be determined during the mixer's particular running time:
ɛ
a
=

ɛ
g
+
ɛ
s
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]

{
D
3

[
(
D
3

b
δ

(
D
+
δ
)
)
+
π
2

n
s
2

d
3

(
d
+
4



)
4


N
qd

[
n
s
·
d
2
+
4


δ

(
D
+
δ
)
]
]
}

(
N
4
·
t
m
V
)
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]
·
[
D
3

(
K
g
+
K
s
)
]
·
(
N
4
·
t
m
V
)
=

K
c
·
(
N
4
·
t
m
V
)
Equation


1
In the Equation 1,
εa: Total energy dissipation rate (m2/s3)
εg. Local shear stress in the gap between the rotor and stator (M2/s3)
εs: Local energy dissipation rate in the stator (m2/s3)
Np: Number of powers (−)
Nqd: Number of flow rates (−)
nr: Number of rotor blades (−)
D: Diameter of rotor (m)
b: Thickness of rotor blade tip (m)
δ: Gap between rotor and stator (m)
ns: Number of stator holes (−)
d: Diameter of stator hole (m)
l: Thickness of stator (m)
N: Number of rotations (l/s)
tm: Mixing time (s)
V: Flow rate (m3)
Kg: Configuration dependent term (m2)
Ks Configuration dependent term in stator (m2)
Kc: Configuration dependent term for the entire mixer

### Claim 10 (depends on 1)

A rotor/stator type mixer as defined in claim 1, wherein the mixer can be scaled up or scaled down by calculating the Equation 1 listed below to estimate the mixer's particular running time and the resulting liquid drop diameters that can be obtained during that mixer's particular running time:
ɛ
a
=

ɛ
g
+
ɛ
s
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]

{
D
3

[
(
D
3

b
δ

(
D
+
δ
)
)
+
π
2

n
s
2

d
3

(
d
+
4



)
4


N
qd

[
n
s
·
d
2
+
4


δ

(
D
+
δ
)
]
]
}

(
N
4
·
t
m
V
)
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]
·
[
D
3

(
K
g
+
K
s
)
]
·
(
N
4
·
t
m
V
)
=

K
c
·
(
N
4
·
t
m
V
)
Equation


1
In the Equation 1,
εa: Total energy dissipation rate (m2/s3)
εg: Local shear stress in the gap between the rotor and stator (m2/s3)
εs: Local energy dissipation rate in the stator (m2/s3)
Np: Number of powers (−)
Nqd: Number of flow rates (−)
nr: Number of rotor blades (−)
D: Diameter of rotor (m)
b:Thickness of rotor blade tip (m)
δ: Gap between rotor and stator (m)
ns: Number of stator holes (−)
d: Diameter of stator hole (m)
l: Thickness of stator (m)
N: Number of rotations (l/s)
tm: Mixing time (s)
V: Flow rate (m3)
Kg: Configuration dependent term (m2)
Ks Configuration dependent term in stator (m2)
Kc: Configuration dependent term for the entire mixer

### Claim 11 (depends on 1)

A method of manufacturing foods, pharmaceutical medicines or chemical products by using the rotor/stator type mixer as defined in claim 1 in which the fluid being processed is subjected to the emulsifying, dispersing, particle size breaking up or mixing operation, wherein the foods, pharmaceutical medicines or chemical products are manufactured by calculating the Equation 1 listed below to estimate the mixer's particular running time and the resulting liquid drop diameters obtained during that mixer's particular running time:
ɛ
a
=

ɛ
g
+
ɛ
s
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]

{
D
3

[
(
D
3

b
δ

(
D
+
δ
)
)
+
π
2

n
s
2

d
3

(
d
+
4



)
4


N
qd

[
n
s
·
d
2
+
4


δ

(
D
+
δ
)
]
]
}

(
N
4
·
t
m
V
)
=

[
(
N
p
-
N
qd

π
2
)
·
n
r
]
·
[
D
3

(
K
g
+
K
s
)
]
·
(
N
4
·
t
m
V
)
=

K
c
·
(
N
4
·
t
m
V
)
Equation


1
In the Equation 1,
εa: Total energy dissipation rate (m2/s3)
εg: Local shear stress in the gap between the rotor and stator (m2/s3)
εs: Local energy dissipation rate in the stator (m2/s3)
Np: Number of powers (−)
Nqd: Number of flow rates (−)
nr: Number of rotor blades (−)
D: Diameter of rotor (m)
b: Thickness of rotor blade tip (m)
δ: Gap between rotor and stator (m)
ns: Number of stator holes (−)
d: Diameter of stator hole (m)
l: Thickness of stator (m)
N: Number of rotations (l/s)
tm: Mixing time (s)
V: Flow rate (m3)
Kg: Configuration dependent term (m2)
Ks Configuration dependent term in stator (m2)
Kc: Configuration dependent term for the entire mixer

### Claim 12 (depends on 11)

Foods, pharmaceutical medicines or chemical products that are manufactured by using the manufacturing method as defined in claim 11.