JPH0463122A - Agitator - Google Patents

Abstract

PURPOSE:To increase the capacity of the agitator in accordance with a fluid by providing an agitated chamber having the inlet and outlet in a fluid to be emulsified and dispersed and an impeller, and furnishing a gap adjusting means to make the inner wall of the agitated chamber or the impeller movable with respect to the other. CONSTITUTION:The agitated chamber 1 is a hollow housing and arranged in the fluid storage chamber 9 or fluid passage through a supporting pipe 8. The chamber 1 is provided with the inlet 4 and outlet 3 for the fluid, and the impeller 2 is fixed to a rotating shaft 10 inserted into the supporting pipe 8 and rotatably placed in the chamber 1. The rear end 10' of the shaft 10 is loosely inserted into the top board 9' of the chamber 9 or the base 8' of the pipe 8 through an annular body 12. The thread parts of the annular body 12 and top board 9' or base 8' are engaged with each other, and the shaft is fixed. The shaft 10 is moved up and down as the engaged part 13 rotates, and the gap between the inner wall 5 of the chamber and the tip 6 of the impeller is adjusted. The change in the gap between a motor 11 and the rear end of the shaft 10 due to the vertical movement of the shaft 10 is coped with a bellows tube 16.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a stirrer used for emulsification, dispersion, or mixing.

<Prior Art> Conventionally, emulsification, dispersion, or mixing of multiple fluids has been carried out by providing a stirring device in a fluid storage tank or in a flow path for these fluids.

This stirring device is composed of a stirring chamber, a support for fixing the stirring chamber in a storage tank, etc., and an impeller provided in the stirring chamber. . The stirring chamber is a housing equipped with an inlet for sucking an external fluid into the interior, and an outlet for discharging the fluid sucked into the interior to the outside. The impeller is installed in the stirring chamber so as to be rotatable inside the stirring chamber.

With the above configuration, the fluid in the storage tank etc. is sucked into the stirring chamber from the discharge port, and the sucked fluid is emulsified, dispersed, mixed, etc. in the stirring chamber by the rotation of the impeller. is processed and returned to the tank through the discharge port.

Through the above operations, the plurality of fluids in the storage tank etc. are subjected to processing such as dispersion, stirring, or mixing.

Taking the case of emulsification as an example, the rotation of the impeller causes shearing of the fluid between the inner wall of the stirring chamber where the discharge port is provided and the blade tips of the impeller.
One fluid emulsifies the other fluid.

By the way, the emulsification processing capacity of a single device varies depending on the properties of the various fluids to be processed and the combination of multiple fluids, so it is necessary to determine the optimum conditions for the emulsification capacity in advance depending on the fluid to be processed. It is necessary to detect and adapt the equipment to this condition.

Conventionally, the maximum emulsifying ability has been achieved by adjusting the rotational speed of the impeller arbitrarily.

This is based on the fact that the factors that determine the emulsification ability are given by the following parameters.

That is, the throughput was evaluated based on values such as shear strength, energy amount, and number of passes.

This shear strength (S) is a value indicating the strength of the shear force between the impeller and the wall of the stirring chamber, and is given by the following equation.

S = Ns-V = Ns-几-=LnNext, the energy amount (Pv) is the amount that indicates the stirring energy per unit throughput, and is given by the following formula.The number of passes (Pn) is In other words, it is the number of times the fluid passes through the g-gap between the impeller and the wall of the stirring chamber, where V is the maximum circumferential speed of the impeller (
m/5ec), d is the impeller diameter (11),
n is the rotation speed (rps) of the impeller. Also, P is the power required for stirring (kw), Nl) is the power number, and liQ
is the discharge coefficient.

Further, Q is the discharge It (sI''/5ea), Ns is the shear coefficient, and ■ is the processing ll1 (Peng 3).

T is the processing time (see), and ρ is the specific gravity ffi Ckg/s') of the fluid scheduled to be processed.

As is clear from the above formulas, the number of rotations of the impeller (11)
The stirring conditions were changed by adjusting the .

<Problem to be solved by the invention> Therefore, arbitrary setting of processing capacity depends on the above-mentioned rotation speed, and in order to manufacture one stirrer, the gap between the blade tip of the impeller and the wall of the stirring chamber is has been empirically set to an appropriate size and treated as fixed.

However, some of the above treatments require changes in shear strength and number of passes depending on the time course of the treatment steps. For example, when producing an emulsion by mixing an oil phase into an aqueous phase, there are steps such as forming the emulsion and subsequent homogenization.
In processes such as oxidation, the optimum values of the shear strength and number of passes change. Corresponding to changes in these values by changing the rotational speed involves changing the required stirring energy, which often requires changing the specifications of the device itself.

Furthermore, when this stirrer is manufactured as a final product, the energy consumption (required power P) increases due to the increase in rotational speed (r+), resulting in the problem of increased usage costs. It is something.

Furthermore, in order to manufacture a mass-produced stirrer, it is necessary to find the optimal distance between the stirring chamber wall of the stirrer and the rotating blade tip, depending on the N class of the fluid to be treated. It is necessary to set the gap (α) in advance. Here, in the formula showing the shear strength (S) mentioned above, the shear coefficient (Ns) and the gap (α)
Focusing on the relationship between the two, 716 oc l/α
have a relationship of

Therefore, in this case, a test stirrer is required that can detect variations in processing capacity due to changes in the gap (α) in advance. In this case, the test stirrer must be able to detect a change in throughput that corresponds to the above-mentioned gap (α), independent of the other parameters mentioned above. Therefore, it is useless to determine the optimal conditions for the fluid that requires treatment by varying the rotational speed (n) as described above. Conventionally, the dominant idea in the industry has been to improve processing capacity by selecting the rotation speed (y+), and there is no intention among those skilled in the art to improve processing capacity by limiting the required energy. there were. Therefore, there is no conventional stirrer that can set the optimum conditions according to the M class of the fluid under a given required energy.

The present invention aims to solve the above problems.

Means for Solving the Problems> However, the present invention has a stirring chamber (1) disposed in a fluid to be subjected to emulsification, dispersion, mixing, etc., and an impeller (2).
).

The stirring chamber (1) has a suction port (4) for sucking fluid into the interior from the outside and a discharge port (3) for discharging the fluid from the interior to the outside.

The impeller (2) is rotatably housed in the stirring chamber (1), and when rotating, the impeller (2) touches the inner wall (1) of the stirring chamber (1).
The above-mentioned emulsification, dispersion, or mixing is performed between the blade tip (5) and the rotating blade tip (6).

The gap between the impeller (2) and the inner wall (5) of the stirring chamber (1) can be selected arbitrarily.
and the stirring chamber wall (5) are provided with gap adjustment means (7) movable so that either one of them (2) and (5) move toward or away from the other or both (2) and (5) from each other. .

<Function> In the present invention having the above means, the clearance (gap (α)) between the blade tips (6) of the impeller (2) and the inner wall (5) of the stirring chamber (1) )) can be selected to have any width. Therefore, in one operation process of the device, the user can select the number of rotations (n) and the gap (α), making it possible to make a wide range of adjustments. Also, the gap (α
) There is no need to stop the equipment for each adjustment. Furthermore, the value of the gap (α) can be changed continuously (steplessly).

Furthermore, when the device of the present application is used as a testing machine, it is possible to analyze the effect on processing capacity by changing only the parameter called gap (α). This means that the shear strength (S) can be increased without increasing the rotational speed, or the desired shear strength C can be achieved without increasing the rotation speed.
8') can be selected. At the same time, the number of passes (n) can also be changed.

Practical example Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows an embodiment of the present invention.

Note that the fluid here includes not only liquids and gases but also powders and the like. Furthermore, the present device is not limited to processing between the same phases, such as liquid phase and liquid phase, but can also perform processing between different phases, such as gas phase and liquid phase. be.

First, the apparatus of the present application includes a stirring chamber (1) and an impeller (2) arranged in a fluid to be subjected to processing such as emulsification, dispersion, or mixing.

The stirring chamber (1) is a hollow housing with a support tube (
8), it is disposed in a fluid storage tank (9) or a fluid travel path. Here, the stirring chamber (1)
The storage tank (9) is opened from the upper part by the support pipe (8).
An example of a device arranged so as to face the inside downward will be explained.

However, the invention is not limited to this example; for example, the stirring chamber (1) may be supported by a support pipe (8) so as to protrude upward from the bottom of the storage tank (9). It is.

The stirring chamber (1) has a suction port (4) for sucking fluid into the interior from the outside and a discharge port (3) for discharging the fluid from the interior to the outside.

The impeller (2) is provided at the tip of the rotating shaft (lO) inserted through the support tube (8), and is located in the stirring chamber (lO).
) is rotatably housed within. The rear end of the rotating shaft (10) is appropriately connected to a motor (11). motor(
11) is effective if it has an appropriate control system or is controlled by a computer. Further, the motor (11) is fixed to a member (11'') formed at a location separate from the storage tank (9).

The device of the present invention performs the above-mentioned emulsification, dispersion, or mixing between the inner wall (5) of the stirring chamber (1) and the rotating blade tips (6) during rotation. In this embodiment, the inner wall (5) of the stirring chamber (1) has a straight cross-section and a forest-like shape as a whole, and the blade tips (6) of the impeller (2) have a straight slope. Although the illustration shows a blade that is widened upward, as will be described later, any spacing between the blade tip (6) and the inner wall (5) may be selected, and the blade The shape and number of walls (5) and the shape of the inner wall (5) are not limited to those shown here. However, the shape of each component must be such that, for example, when the device is used for emulsification, shearing can occur between the blade tip (6) and the inner wall (5) by the rotation of the impeller (2). .

In addition, except for simple stirring or mixing, when using the device of the present invention for processing such as emulsification as described above, the discharge port (
3) is preferably provided at a position through which the blade tip (6) of the inner wall (5) passes.

Furthermore, depending on other configurations, it is also possible to use (3) as an inlet and (4) as an outlet. Of course, these suction ports and discharge ports are formed as a housing, and the stirring chamber (
It is also possible to provide it in a location other than 1).

In the device of the present application, the distance between the impeller (2) and the inner wall (5) of the stirring chamber (1) can be arbitrarily selected;
Gap adjustment means (7) movable so that one of the impeller (2) and the stirring chamber wall (5) approaches or moves away from the other or both (2) and (5) has.

A suitable gap adjusting means (7) will be explained below. The vicinity of the rear end (10') of the rotating shaft (10) is connected to either the top plate (9') of the storage tank (9) or the base (8°) of the support tube (8) via the annular body (12). I played with it (to do it).

Annular body (12) and near the rear end of the rotating shaft (jO) (10')
An appropriate number of bearings (14) are interposed between the two. Further, the annular body (12) and the top plate (9") or the base (8°) are screwed together through a threaded part (13), that is, the threaded parts provided on both of them are threaded together. The rotating shaft (10) is moved up and down by the rotation of the threaded part (13), and the distance between the inner wall (5) and the blade tip (6) is adjusted.

The threaded part (here, the annular body (12
The threaded portion on the ) side is rotated by the handle (15).

The motor (1) generated by the lifting and lowering of the rotating shaft (10)
Changes in the distance between 1) and the rear end of the rotation shaft (lO) are handled by interposing a flexible (expandable) bellows tube (16) between the motor (11) and the rear end of the rotation shaft (lO). .

With the above configuration, the inner wall (5) and the blade tip (
6) can be arbitrarily selected. Normally, the selection width of this interval is set as necessary. In the case of emulsification treatment, the adjustment range is usually O62 to 2.0. Further, the stirring process is set to be adjustable in the range of 2°0■ or more. However, it is not limited to these values; for example, a value of 0.21 or less may be set as the lower limit,
It is also possible to implement. Regarding the upper limit of the above value, it is also possible to set it to 2.0 mm or more, for example, in the case of emulsification and other treatments. Furthermore, the adjustable range can also be set to be larger than the above-mentioned width, or conversely, it is also possible to set it to be smaller than the above-mentioned width.

Also, (1") shown in FIG. 2 and FIG. There is. This ensures that the fluid sucked in from the suction port (4) passes through the shearing area and then passes through the discharge port (4).
3), and if necessary, the bulkhead (
It is also possible to implement this without providing B). This also applies to the embodiment shown in FIG. 3, which will be described later.

In Figure 1, (17) is a hair ring, and (18)
is an oil seal. Further, (19) is a mechanical seal. This mechanical seal (19
It is also possible to provide only the oil seal (18) without providing the oil seal (18). Further, in the present device, as described above, the stirring chamber (1) is formed at the tip of the support tube (8). The stirring chamber (1) and the support pipe (8) have been described as being shown as being integrated. However, the stirring chamber (1) is formed separately from the support tube (8) as a housing for the impeller (2), and the stirring chamber (1) is added to the support tube (8) later in the manufacturing process.
8) can be implemented as a fixed device.

This also applies to the embodiment shown in FIG. 3, which will be described later.

Next, another embodiment of the gap M adjustment means (7) is shown in FIG. This uses an elevating plate (12') in place of the annular body (2) of the embodiment shown in FIG.

To explain in detail, the elevator board (+2°) has a rotation axis (10°) in the center.
) It has a fitting part (12'') into which the rear end (10') is fitted.

This fitting part (12") is located near the rear end (10") of the rotating shaft (10).
), the elevator plate (12') moves together with the rotating shaft (10) at least in the vertical direction in the figure.

Like the motor (11) described above, the motor (11°) is fixed to a member (this need not be the member (11')) formed separately from the storage tank (9). This motor (11') has its rotating shaft (2[)
2'), and a shaft (23) is fixed to the tip of the rotating shaft (21) by a coupling (22). The tip of the shaft (bottom m in the figure) has a male cut of 23゛.

On the other hand, a receiving portion (24) for receiving the tip of the shaft (23) is formed at an appropriate position on the board surface of the elevator board (12°). The inside of this receiving part (24) is internally threaded (not shown in Fig. 71 to avoid cluttering the drawing), and is screwed into the male thread 23' of the shaft (23).

By adopting such a configuration, each time the motor (11') is driven, the male thread U (2
3') rotates, and this male part 23') or the receiving part (2
The elevating plate (12°) is lowered by -F via the female screw 4). At this time, in order to prevent the lifting board (12") from rotating in the horizontal direction in the figure, a detent is attached and fixed to the top plate (9゛) of the storage tank (9) through an appropriate position on the board surface of the lifting board (12°). It is effective to provide (25).

In the embodiment shown in FIG. 3, the mechanical sole (19) shown in FIG. 1 is not provided.

In addition, the stirring chamber (1) is formed at an acute angle at the external tip compared to the embodiment shown in FIG. It's on a slope. Furthermore, the rake face of each blade of the impeller (2) is curved, and when viewed as a whole, the impeller (2) is formed in a twisted state. In the embodiment shown in FIG. 1, the blades of the impeller (2) are not curved, but the blades shown in FIG. It is also effective to curve the blades as shown here.

In the embodiment shown in FIG. 3 as well, such a stirring chamber (
1) The peripheral shape may be the same as that shown in FIG. 1, or may be different from that shown in FIGS. 1 and 3.

In each of the above embodiments, the stirring chamber (1) is the storage tank (9).
), the rotation of the impeller (2) is
It is responsible not only for processing such as the above-mentioned emulsification, but also for fluid circulation within the storage tank (9). Therefore, unlike these examples, in the case of a device that is connected to a fluid flow path, there is no need to take the above-mentioned circulation into consideration when configuring each member. In particular, there is no need to select a rotational capacity that enables circulation, dimensions, and materials that can withstand circulation for the impeller and its rotational parts. Of course, even in the case where the fluid is passed through the above-mentioned fluid flow path, the settings for fluid circulation can be made in the same way as in the storage tank described above, and such settings can be made as necessary. All you have to do is

<Effects of the Invention> By implementing the present invention, the energy required for processing such as C stirring can be kept constant if only the rotation speed is controlled, and the blade tip (6) of the impeller (2) and the stirring chamber (1 ) and the inner wall (5) to an arbitrary width, it is possible to improve the stirring ability depending on the fluid.

Furthermore, from the above-mentioned effects, it is possible to analyze changes in each data due to changes in only the clearance.

[Brief explanation of the drawing]

FIG. 1 is a general longitudinal cross-sectional view showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part thereof. FIG. 3 is a general longitudinal sectional view showing another embodiment. (1) Stirring chamber, (2) Impeller, (3) Discharge port, (4) Suction port, (5) Inner wall, (6)
...Blade tip, (7)...Gap adjustment device, (8)...
Support pipe, (9)... Storage tank, (10)... Rotating shaft procedural amendment (voluntary) 1. Indication of the incident 1990 Patent Application No. 17.3005 2. Name of the invention Stirrer 3゜Relationship with the amendment case Applicant Address: 3-20-10 Muko-cho, Amagasaki-shi, Hyogo Name: Representative Director of M Technique Co., Ltd. Makoto Enoki 4゜Address: 1-7 Kitahorie, Nishi-ku, Osaka No. 3, 6゜7゜ Date of ``Detailed Description of the Invention'' of the specification subject to amendment. Column for contents of amendment. (1) The text from page 4, line 4 to page 4, line 20 of the specification shall be corrected as follows. 5=NS@v=NS・πIId@n Next, the energy amount (Pv) is the stirring amount per unit processing amount.
It is a quantity indicating the stirring energy, and is given by the following formula: P Np・ρ・n3・d5Pv= −×
T=xTv
V The number of passages (Pn) is the circulation number, that is, the number of times the fluid passes through the gap between the impeller and the inner wall of the stirring chamber, and is given by the following equation. Q Nq-n-d3 Pn= -XT= x'l'v

Claims (1)

[Claims] The stirring chamber (1) is provided with an impeller (2) and a stirring chamber (1) arranged in a fluid to be subjected to treatment such as emulsification, dispersion, or mixing. 1) has a suction port (4) for sucking fluid into its interior from the outside and a discharge port (3) for discharging fluid from its interior to the outside, and the impeller (
2) is rotatably housed in the stirring chamber (1), and during rotation, in the gap between the inner wall (5) of the stirring chamber (1) and the rotating blade tip (6), It performs the emulsification, dispersion, or mixing described above, and is comprised of the impeller (2) and the stirring chamber (
The gap between the impeller (2) and the inner wall (5) of the stirring chamber (5) can be selected arbitrarily, so that either one of the impeller (2) and the stirring chamber wall (5) may be separated from the other or both (2) ( 5) comprises gap adjusting means (7) movable toward or away from each other.