JPH10309402A - Foaming preventing apparatus instirring tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent foaming even in liquid which is affected with an agent for preventing foaming. SOLUTION: A metal mesh 11 is installed in a position slightly above the liquid surface 10 in a stirring tank. A hood 14 is installed at a position above the metal mesh 11. The hood 14 is connected with a blower 15 through a pipe 16. A stirring axis 5 of a stirring apparatus 4 to stir the liquid body 9 in the stirring tank main body 1 is inserted through a center hole 12 of the metal mesh 11 and connected with an output axis 7 of a driving apparatus 6 on an upper cover 2. Foams generated on the liquid surface 10 due to the stirring by the stirring apparatus 4 are sucked through the hood 4, so that the foams are broken while passing through the metal mesh 11 and consequently foaming is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing forming in a stirring tank used in a plant.

[0002]

2. Description of the Related Art As shown in FIG. 4, an agitating tank has an upper lid 2 attached to the top of an agitating tank body 1 so as to be opened and closed by a flange 3, and a stirrer 4 accommodated in the agitating tank body 1. The stirring shaft 5 is detachably connected to an output shaft 7 of a driving device 6 installed on the upper lid 2, and the stirring shaft 5 is rotated by the driving device 6 so that the stirring blade 8 at the lower end of the stirring shaft 5 is moved. By rotating, the liquid 9 inside is stirred.

However, when a stirring action is performed in the stirring tank, a bubbling phenomenon, that is, a forming phenomenon occurs on the liquid surface 10.

[0004] Conventionally, as a method of preventing the forming in such a stirring tank, an agent for preventing the forming is added.

[0005]

However, when the above-mentioned conventional forming preventing agent is added, the forming can be prevented by the agent. However, the content liquid 9 to be stirred reacts with the added agent or the purity is reduced. When it is affected by a decrease or the like, there is a problem that the medicine cannot be used and the forming cannot be prevented.

Therefore, the present invention is intended to reliably prevent forming caused by stirring of any liquid, instead of adding a conventional agent for preventing forming.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a stirrer provided inside a main body of a stirring tank so as to stir the content liquid. In this position, a metal mesh is arranged in a horizontal direction, and a hood connected to a suction device is arranged above the metal mesh, and bubbles generated by stirring are passed through the metal mesh by a suction force generated in the hood. The configuration is such that the

When the inside of the hood is made negative pressure by the suction device,
Foam on the liquid surface is destroyed when trying to move in the direction of the hood through the metal mesh, so that forming can be prevented.

In addition, a metal mesh is arranged in a horizontal direction at a position slightly above the liquid level inside the stirring tank provided with a stirrer inside the main body of the stirring tank so as to stir the content liquid. In the gap where the stirring shaft penetrates the metal mesh, the air or nitrogen blowing pipe from the outside of the stirring tank faces, and air or nitrogen is blown downward from the gap to allow the bubbles to pass through the metal mesh. Even if the air is not sucked by the hood, the gas on the liquid surface tends to rise through the metal mesh due to air or the like blown from the blowing pipe, so that the bubbles are broken by the metal mesh.

Further, a metal mesh is arranged in a horizontal direction at a position slightly above the liquid level inside the stirring tank provided with a stirrer inside the stirring tank main body so as to stir the content liquid,
In addition, a hood connected to a suction device is disposed above the metal mesh, and an air or nitrogen blowing pipe from the outside of the stirring tank is provided in a gap where the stirring shaft of the stirrer passes through the metal mesh. , And the bubbles generated by stirring are caused to pass through the metal mesh by the suction force generated in the hood and the air or nitrogen blown from the blowing pipe, so that suction and blowing of air or the like are performed. Both cause the foam to pass more aggressively through the metal mesh and break.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 shows one embodiment of the present invention. In a stirring tank constructed as shown in FIG.
A metal mesh 11 having an outer diameter corresponding to the inner peripheral surface of the stirring tank body 1 and a flat plate-shaped metal mesh 11 provided with a hole 12 at the center thereof so as to penetrate the stirring shaft 5 of the stirrer 4 is provided on the upper lid 2.
3, the metal mesh 11 is placed horizontally above the liquid level 10 when the upper lid 2 is attached to the top of the stirring vessel body 1, and the upper lid 2 is placed inside the upper lid 2. Is connected to a blower 15 as a suction device via a pipe 16,
By sucking the inside of the hood 14 with the blower 15, bubbles generated on the liquid surface 10 are broken through the metal mesh 11.

The metal mesh 11 may have a two-layer structure of an upper surface and a lower surface. The metal mesh on the upper surface may have a dense mesh structure, and the metal mesh on the lower surface may have a rough mesh structure. . Thus, dense and coarse 2
If the layer is made of a metal mesh, the destruction of bubbles can be performed more reliably. The same components as those in FIG. 4 are denoted by the same reference numerals.

Now, the stirrer 4 in the stirring tank is operated to operate the liquid 9.
Is formed on the liquid surface 10.
At this time, if the inside of the hood 14 is sucked by the blower 15,
Bubbles and gas between the liquid surface 10 and the metal mesh 11
It is sucked in the direction in which the hood 14 is located, and passed through the metal mesh 11. As a result, the foam is not destroyed when passing through the metal mesh 11, so that foaming on the liquid surface 10 can be prevented, and the bubbles rise upward through the gap between the hole 12 of the metal mesh 11 and the stirring shaft 5. The amount of escape can be reduced.

When replacing the metal mesh 11, the upper lid 2 can be taken out by removing the upper lid 2 from the stirring tank main body 1, and can be easily replaced with a new metal mesh 11.

Next, FIG. 2 shows another embodiment of the present invention. In place of suspending and supporting the metal mesh 11 from the upper lid 2, a support table 17 is provided on the inner peripheral surface of the stirring vessel main body 1.
Are provided so as to protrude at several places, and the metal mesh 11 is placed on the support base 17 and supported.

According to this embodiment, the metal mesh 1
This is advantageous because the installation of the metal mesh 11 is easy and the metal mesh 11 can be easily installed even if it has a two-part structure.

FIG. 3 shows still another embodiment of the present invention, in which a support base 1 protruding from the inner peripheral surface of the stirring tank body 1 is provided.
In a configuration similar to that of FIG. 2 in which the metal mesh 11 is supported by the hood 7, the hood 14 in FIG. A blowing pipe 18 for blowing air or nitrogen is provided, and a gas outlet 1 is
9 is provided.

According to this embodiment, when forming is caused on the liquid surface 10 by the operation of the stirrer 4, air or nitrogen is directed toward the liquid surface 10 from between the stirring shaft 5 and the hole 12 of the metal mesh 11. By blowing, it is possible to prevent the stirrer shaft 5 and the hole 12 of the metal mesh 11 from being pulled upward, and at the same time, it is possible to blow up bubbles on the liquid surface 10 through the metal mesh 11. Thus, foaming can be prevented by breaking the bubbles through the metal mesh 11.

Further, in the embodiment shown in FIGS. 1 and 2,
As in the embodiment shown in FIG. 3, it is also possible to combine a structure in which air or nitrogen is blown from a gap between the stirring shaft 5 and the hole 12 of the metal mesh 11.

By doing so, the amount of the material that escapes upward from the gap between the stirring shaft 5 and the hole 12 of the metal mesh 11 can be made lower, and the bubbles can be effectively broken by the metal mesh 11.

The metal mesh 11 in each of the above-described embodiments is, of course, free from any reaction even when the material is in contact with the content liquid. 1 and 2 that a layer structure may be used.
In the embodiment shown in FIG. 7, only the portion where the hood 14 is installed may be made of metal mesh, and the other portion may be covered with a plate, and the blower 15 is shown as a suction device. An example in which the apparatus may be applied to an apparatus in which the stirring tank main body 1 is covered with the upper lid 2 has been described. Of course, various changes can be made within the above.

[0023]

As described above, according to the apparatus for preventing foaming in a stirring tank of the present invention, a metal mesh is arranged at a position above a liquid surface so that it can be locally sucked at a position above the metal mesh. Since the hood is arranged and the inside of the hood is sucked, even if forming occurs due to the stirring of the liquid in the stirring tank, the foam is sucked from above the metal mesh so that the bubbles form the metal mesh. It can be broken when passing and can prevent forming.Additionally, there is no need to add a drug as in the past, and there is a possibility that the addition of the drug may affect the reaction with the content liquid or affect the purity. It is also possible to apply air to the liquid surface from the gap between the stirring shaft of the stirrer and the metal mesh instead of suctioning with a blower. That can break up foams in metal mesh without suction by, an excellent effect like.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing an embodiment of the present invention.

FIG. 2 is a schematic diagram showing another embodiment of the present invention.

FIG. 3 is a schematic diagram showing still another embodiment of the present invention.

FIG. 4 is a schematic view showing an example of a stirring tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Stirring tank main body 2 Top lid 4 Stirrer 5 Stirrer shaft 6 Drive device 8 Stirrer blade 9 Liquid (content liquid) 10 Liquid surface 11 Metal mesh 12 Metal mesh hole 14 Food 15 Blower (suction device) 17 Supporting stand 18 Blowing pipe

Claims (5)

[Claims] 1. A metal mesh is disposed in a horizontal direction at a position slightly above a liquid level inside a stirring tank provided with a stirrer inside a stirring tank main body so as to stir the content liquid. A hood connected to a suction device is disposed at a position above the hood, and a foam generated by stirring is caused to pass through a metal mesh by a suction force generated in the hood. . 2. The forming prevention device for a stirring tank according to claim 1, wherein the metal mesh is suspended from and supported by an upper lid that covers the top of the stirring tank body. 3. The stirrer according to claim 1, wherein the metal mesh is supported by a support provided on an inner peripheral surface of the stirring tank body.
A forming prevention device in the stirring tank described in the above. 4. A metal mesh is disposed in a horizontal direction at a position slightly above a liquid level inside a stirring tank provided with a stirrer inside the stirring tank main body so as to stir the content liquid. A structure in which an air or nitrogen blowing pipe from the outside of the stirring tank faces a gap where the stirring shaft penetrates the metal mesh, and blows air or nitrogen downward from the gap to allow bubbles to pass through the metal mesh. A forming preventing device in a stirring tank. 5. A metal mesh is disposed in a horizontal direction at a position slightly above a liquid level inside a stirring tank provided with a stirrer inside a stirring tank main body so as to stir the content liquid. The hood connected to the suction device is arranged at the upper position of the stirrer.Furthermore, the air or nitrogen blowing pipe from outside the stirring tank faces the gap where the stirring shaft of the stirrer penetrates the metal mesh, A foaming prevention device in a stirring tank, wherein bubbles generated by stirring are passed through a metal mesh by suction force generated in a hood and air or nitrogen blown from a blowing pipe.