KR101927809B1 - Foam removal device - Google Patents

Abstract

The present invention relates to a foam removing device having a means for automatically injecting an antifoaming agent as a buoyant force of a foam, comprising a filling port formed at a lower portion thereof, a sealing packing which is seated above the filling port and seals the filling port so as to open and close, A buoyant elevating part for transmitting the buoyancy of the foam to the sealing packing to open the loading port; a sealing housing for sealing the top of the buoyancy elevating part and the inlet of the defoaming tank together; A support bracket for supporting the defoaming agent injection tube at a predetermined distance from the upper surface of the water tank and a valve installed in the defoaming agent injection tube, At the point where bubbles are removed as well as detection and defoaming process The process of stopping the feeder is automatically performed, there is no fear of maintenance due to the mechanical operation, and when the bubble is actually removed, the feeding of the defoamer can be stopped, thereby preventing the defoaming agent from being over- It is an object of the present invention to provide a defoaming device having an eco-friendly effect in which a defoaming agent is used in a minimum amount required.

Description

Foam removal device

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a defoaming device, and more particularly, to a defoaming device provided with a means for automatically injecting defoaming agent by buoyancy of foam.

In general, industrial water or chemicals used as cooling water or degreasing agents, or other oils or fats generated in various sewage facilities expand much more than the volume of the fluid itself. Therefore, it is preferable to remove the foam by discharging the foam to the outside or expanding the internal pressure of the storage facility. In this case, a defoaming agent is usually used to remove the bubbles generated by organic substances.

The antifoaming agent is mainly composed of an oil-like substance or a water-soluble surfactant having low volatility and high diffusivity.

However, since the bubble removing operation occurring in various facilities is normally performed by the operator manually observing the bubble generation, the defoaming agent is manually inputted, so that it takes time and effort, and the operator overlooks the fact that the bubble is generated Difficult or dangerous situations can arise as the bubbles flood instantaneously as you concentrate on other things.

Thus, a technique is required that can automatically remove bubbles without relying on operator observations.

The conventional technology developed in view of such a problem is disclosed in the Utility Model No. 1993-0014353 (Published Date: 1993. 07. 27) shown in FIG. 1, and the automatic defoaming agent dispensing apparatus of the defrosting facility.

As shown in FIG. 1, the prior art includes a foam sensor (1, 1 '), solenoid valves (33, 34) for restricting defoaming of the defoamer storage tank (30) A timer 60 driven by the contacts 43 and 53 of the relays 40 and 50 and a timer 60 driven by the contacts 60 and 61 of the timer 60, A solenoid valve for restraining defoaming of the defoaming agent driven by the serial contacts of the relays 40 and 50 and display lamps 37 and 38 for confirming defoaming of the defoaming agent and a buzzer 70 and a stop lamp 80 controlled by a timer contact, .

Due to the above-described structure, the prior art of FIG. 1 observes bubbles directly by the operator and automatically detects the occurrence of bubbles even when the defoaming agent is not manually input, and the defoaming agent is introduced, and the amount of defoaming agent is controlled by the timer, So that the manpower and time required for bubble removal can be saved, and bubble generation can be prevented.

However, in the prior art, since expensive sensors are required to detect bubbles and defoamers for bubble removal are made of electronic equipment, it takes a considerable cost to manufacture the equipment, and malfunctions and maintenance problems arise And the amount of defoaming agent is uniformly determined, so that there is a problem that defoaming agent can not be supplied while controlling the amount depending on the situation.

Therefore, it is possible to produce the foam at a low cost, and it is possible to perform all processes automatically so that the defoaming agent can be stopped at the time of removing bubbles as well as foam detection and defoaming agent insertion process. Moreover, It is mechanically driven so that there is no fear of maintenance due to failure, and when the bubble is actually removed, the defoaming agent can be stopped so that the defoaming agent is prevented from being over- or under- Is required.

Public utility model public office room 1993-0014353 (public date: 1993. 07. 27)

Accordingly, the present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a method and apparatus for manufacturing a bubble- In addition, since the structure is simple but not driven by electric power and mechanically driven, there is no fear of maintenance due to failure, and when the bubbles are actually removed, the defoaming agent may be stopped, so that the defoaming agent is excessively charged or under- Friendly foam removing device which is prevented from being used and the defoaming agent is used in a minimum amount required.

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a foam removing apparatus for automatically removing foam rising inside a water tank, the foam removing apparatus comprising: A buoyant tank installed on the upper part of the water tank and having a sealing packing which is seated on the upper part of the inlet so as to open and close the inlet so as to open and close the inlet, And a defoaming agent which is connected at one end to the sealing housing and at the other end to the inside of the water tank and flows into the sealing housing through the inlet port to the inside of the water tank A defoaming agent injecting section composed of a defoaming agent injecting tube, A support bracket for supporting the upper surface of the water tank at a predetermined distance from the upper surface of the water tank, and a valve installed in the defoaming agent injection pipe.

Preferably, the buoyancy elevating unit comprises a buoy, which is inserted into the water tank and ascends and descends according to the foam level elevated in the water tank, and a lifting rod that transmits the upward movement of the buoy to the sealing packing to open the lower portion of the defoaming tank.

In addition, the sealing housing is preferably provided with a return spring for connecting the inside of the sealing housing and the bottom of the sealing packing so that the sealing packing is seated on the top of the inlet when the buoyancy is attenuated.

At this time, a guide rod vertically protruding from the bottom to the top of the sealed housing is formed in the sealed housing, and a guide cylinder in which the guide rod is inserted into the vertically upper portion of the guide rod is vertically downwardly formed on the bottom surface of the sealed packing, The guide cylinder is moved so that the sealing packing is guided to be vertically lifted and lowered.

In the lower part of the sealing housing, a through-hole is preferably formed through which the lifting rod penetrates, and a cylindrical sliding bearing is provided on the inner circumferential surface of the through-hole so as to surround the outer circumferential surface of the lifting rod.

The foam removing device according to the present invention can be manufactured at low cost because it is made of a simple structure, and all processes can be automatically carried out so that the defoaming agent can be stopped at the time of removing bubbles as well as foam detection and defoaming agent insertion process, It is simple but it is not driven by electric power and it is mechanically driven, so there is no fear of maintenance due to failure. When the bubbles are actually removed, the defoaming agent can be stopped so that the defoaming agent is prevented from being over- It is possible to minimize environmental damage and complaints caused thereby.

1 is a block diagram showing a conventional technique,
2 is a front view of a defoaming device according to the present invention;
3 is a perspective view of a defoaming device according to the present invention,
4 is a front sectional view of a defoaming device according to the present invention,
5 is a side cross-sectional view of a defoaming device according to the present invention,
6 is an operational state diagram of the defoaming device according to the present invention,
Fig. 7 is a front sectional view showing a modified embodiment of Fig. 4,

The specific structure or functional description presented in the embodiment of the present invention is merely illustrative for the purpose of illustrating an embodiment according to the concept of the present invention, and embodiments according to the concept of the present invention can be implemented in various forms. And should not be construed as limited to the embodiments described herein, but should be understood to include all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

2, the bubble removing device according to the present invention includes a buoyancy elevator 10 disposed inside a conventional water tank 1, a defoaming tank 30 disposed above the water tank 1, A support bracket 233 for supporting the defoaming agent injection tube 22 at a predetermined distance from the upper surface of the water tank 1, And a valve 232 installed in the injection pipe 22.

The buoyancy elevating portion 10 is composed of a buoy 11 and a lifting rod 12 coupled with the buoy 11 and lifted and lowered together as shown in Fig. The buoy 11 is a member that is raised or lowered together with the water surface in accordance with the rising or falling of the water surface in a state of being raised to the water surface by buoyancy like a normal buoy.

However, as shown in FIG. 2, the buoys 11 in the present invention are formed in a large area in order to more reliably receive the rising pressure of the foam rising from the lower part of the water tank 1, And is opened so as to be gradually widened toward the lower side. Therefore, when the bubble rises, the buoys 11 are also sensitively reacted and raised to the upper side. Therefore, the bubble generation can not be detected in the bubble generating state, thereby preventing the defoaming agent from being injected.

The elevating rod 12 is a rod-shaped member coupled to the upper portion of the buoy and formed toward the vertical upper portion. The upper end of the elevating rod 12 is disposed at the inlet of the defoaming tank 30 to be described later.

2 and 4, the defoamer tank 30 is provided on the upper part of the water tank 1 and is filled with defoamer. The defoaming tank (30) is provided with a sealing packing (35) formed with a charging port at the bottom and opening and closing the charging port. When the sealing packing 35 is disposed inside the defoaming tank 30 and is seated on the top of the charging port, the charging port is blocked and the defoaming agent is prevented from falling through the charging port. Here, it is the raising and lowering rod 12 that raises or lowers the sealing packing 35 to open or close the charging port. That is, when the sealing packing 35 is lifted up by the upper end of the lifting rod 12 touching the bottom surface of the sealing packing, the defoaming agent in the defoaming tank 30 falls down through the inlet. At this time, the defoamer injection unit 20 will be described later so that the defoaming agent is not scattered to the surroundings but can be introduced into the water tub 1 through the inside of the sealing housing 21.

The defoamer tank 30 is provided with an oil level meter 33 formed as a window formed in the tank body 31 so as to be long in the height direction of the tank body 31 so that the residual amount of defoamer inside the tank body 31 can be visually confirmed . An upper portion of the defoaming tank 30 may be provided with an air breather 32 for preventing a pressure increase that may occur in the defoaming tank 30 by balancing the defoaming agent internal pressure and the external atmospheric pressure .

As shown in FIGS. 2 and 4, the defoamer injection unit 20 is installed so that the defoaming agent flowing down from the inlet of the lower portion of the defoamer tank 30 can be introduced into the water tub 1. The defoaming agent injecting unit 20 includes a sealed housing 21 having an open top and a predetermined volume and a defoaming agent injection pipe 22 having one end connected to the sealing housing 21 and the other end drawn into the inside of the water tank 1 ).

The defoamer injection tube 22 is preferably branched over two galles extending from the sealed housing 21 to the water tub 1. 2 and 7, it is not limited to two galleries. As the defoamer injection pipe 22 is branched to two or more galles, the defoaming agent injected into the water tank 1 is mixed with the water tank 1 more quickly and uniformly, so that the defoaming effect is rapidly exhibited, . Here, the portion from the sealed housing 21 to the branch point of the defoamer injection pipe 22 is referred to as a defoaming agent distribution pipe 23.

As shown in FIG. 2, manually operable valves 232 may be installed at points where the defoamer injection pipes 22 are branched. A support bracket 233 may be provided to support the defoaming agent injection pipe 22 on the upper surface of the water tank 1 so that the branched defoaming agent injection pipe 22 can be kept balanced without being tilted.

4, when the defoaming agent flows into the inside of the sealing housing 21, the elevating rod 12 and the elevating rod 12 are disposed in the through hole formed in the lower portion of the sealing housing 21, The defoaming agent may leak between the inner circumferential surfaces of the through holes. In order to prevent leakage of the defoamer, one or more lower O-rings 26 may be provided on the inner circumferential surface of the through-hole to maintain airtightness. The upper O-ring 27 is provided on the upper surface adjacent to the inlet port so that the sealant packing 35 is not leaked to the gap between the sealing packing 35 and the inlet of the lower portion of the tank body 31, And keeps airtightness between the inlet and the inlet.

Even if the upper O-ring 27 is installed and the seal packing 35 has a specific gravity larger than that of the defoaming agent, even if the defoaming agent tank 30 is vibrated in the upper portion of the charging port 30, When the vortex is formed, the sealing packing 35 is not exactly aligned with the upper portion of the charging port but is laterally displaced so that the defoaming agent can be introduced into the sealing housing 21, or when the defoaming agent is once charged, The sealing packing 35 may not be quickly seated on the upper portion of the charging port.

In order to prevent such a phenomenon, a return spring 24 for connecting between the bottom surface of the sealing packing 35 and the bottom surface of the sealing housing 21 is provided.

Even if the sealing packing 35 is raised together with the ascending of the ascending bar 12, the return spring 24 is lowered together with the ascending bar 12 when the buoy is removed and the buoy is sinked. The center of gravity and the center of gravity are aligned.

In addition to the return spring 24, the guide rod 25 and the guide cylinder 36 are configured as shown in FIG. 4 (a) so as to ensure that the center of the seal packing 35 coincides with the center of the loading port, As shown in FIG.

The return spring 24 can be oscillated not only in the vertical direction but also in the lateral direction so that the seal packing 35 can not be seated in the correct position. In order to prevent such a phenomenon, a guide rod 25 protruding toward a vertical upper portion is provided on the bottom surface of the sealing housing 21, and a guide cylinder 36 protruding downward from the bottom surface of the sealing packing 35 is provided, Since the seal packing 35 is always raised and lowered only toward the vertical upper portion and the vertical lower portion when the guide rod 25 is inserted into the chamber 36, the center of the seal packing 35 does not coincide with the center of the inlet port, Can be thoroughly prevented. 6 shows a state in which the sealing packing 35 is raised toward the vertical upper part and the defoaming agent is introduced into the sealed housing 21.

On the other hand, a frictional force may be applied between the outer circumferential surface of the elevating rod 12 and the inner circumferential surface of the through-hole on the lower portion of the sealing housing 21 and the lower O-ring 26 provided on the inner circumferential surface of the through- The rod may move up and down.

Therefore, as shown in FIG. 7, when the sliding bearing 28 that surrounds the outer circumferential surface of the elevating rod 12 is inserted into the lower through hole of the enclosing housing 21 so that the upward and downward movement of the elevating rod 12 can be ensured smoothly , The defoaming agent leakage through the lower through-hole of the sealing housing 21 can be effectively prevented, and smooth up-and-down movement of the elevating rod 12 can be assured. In particular, since the sliding bearing 28 is impregnated with a solid lubricant on the inner circumferential surface thereof, it is possible to prevent the decomposition of the lubricating oil due to the defoaming agent and to use it for a long period of time.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. It will be apparent to those of ordinary skill in the art.

1: water tank 2: drain
10: buoyancy elevation part 11: buoy
12: Raised rod 20: Defoaming agent injection part
21: Sealing housing 22: defoaming agent injection tube
23: Defoaming agent distribution pipe 24: Return spring
25: guide rod 26: lower O-ring
27: upper O-ring 28: sliding bearing
30: defoaming tank 31: tank body
32: absorber member 33: oil level meter
34: Lower block 35: Sealing packing
36: guide cylinder 212: side projection
213: fastening bolt 232: valve
233: support bracket

Claims (2)

A bubble removal device for automatically removing bubbles rising inside a water tank,
A defoaming tank provided on the upper part of the water tank with a sealing packing having an inlet formed at a lower portion thereof and sealing the inlet so as to be opened and closed;
A buoyant lifting unit for transferring the buoyancy of the foam rising inside the water tank to the sealing packing to open the loading port;
A sealing housing for sealing the upper end of the buoyancy elevating portion and the lower portion of the inlet of the defoamer tank together; a defoaming agent for introducing the defoaming agent, which is connected to one end of the sealing housing and enters the inside of the water tank, A defoaming agent injection unit comprising an injection tube;
A supporting bracket for supporting the defoaming agent injection tube at a predetermined distance from the upper surface of the water tank; And
A valve installed in the defoaming agent injection tube; The bubble removal device comprising:
The method according to claim 1,
Wherein the buoyancy elevating portion comprises a buoy to be inserted into the water tank and ascended and descended along the foam level rising inside the water tank and a rising bar for transmitting the upward movement of the buoy to the sealing packing to open the lower portion of the defoaming tank. Device.

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