JP3572552B2 - Defoaming device for fluid storage tank - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a defoaming device for defoaming bubbles generated in a fluid in a fluid storage tank for storing a fluid such as treated water by a water spraying action from a shower.
[0002]
[Prior art]
For example, in molding a shell mold, silica sand mixed with a thermosetting synthetic resin is heated to form a mold. At this time, a large amount of exhaust gas is generated, but since this exhaust gas contains harmful components such as ammonia, phenol, and formaldehyde, it cannot be released to the atmosphere as it is. For this reason, the exhaust gas is deodorized through a deodorizing device as shown in the drawing and then released.
FIGS. 2A and 2B show a deodorizing apparatus, in which FIG. 2A is a schematic view showing the entire configuration of the deodorizing apparatus, and FIG. 2B is a perspective view showing a storage tank for treated water provided below the deodorizing apparatus.
The deodorizing apparatus includes a cylindrical exhaust gas tower 1, a baffle plate 3 provided in the exhaust gas tower 1, a treated water storage tank 4 provided as a fluid storage tank provided in a lower part of the exhaust gas tower 1, and a storage tank 4. It is composed of a sprinkler and the like that pumps up the treated water in the tank 4 and sprays water from above the exhaust gas tower 1.
[0003]
The exhaust gas is guided into the exhaust gas tower 1 from an exhaust gas introduction pipe 7 provided below the exhaust gas tower 1, and rises upward in the exhaust gas tower 1. At this time, since the baffle plates 3 are provided in an intersecting manner in the exhaust gas tower 1, the exhaust gas cannot pass through the exhaust gas tower 1 at a stretch, and it takes a certain amount of time along the baffle plate 3. Going up. A shower 2 is provided above the exhaust gas tower 1, and treated water pumped up from a storage tank 4 by a pump P driven by a motor M is supplied to the shower 2 through a water distribution pipe 6, It is designed to sprinkle vigorously and in large quantities from above. That is, a large amount of treated water sprinkled into the exhaust gas tower 1 by the shower 2 comes into contact with the exhaust gas rising along the baffle plate 3, and harmful components in the exhaust gas dissolve into the treated water and are collected in the storage tank 4. You. Then, in the storage tank 4, it is decomposed and deodorized by bacteria in the treated water.
[0004]
By the way, treated water usually used for deodorization of exhaust gas is domestic wastewater, and due to its properties, bubbles are easily generated on the treated water surface. Therefore, when the treated water is sprinkled from above the exhaust gas tower 1, a large amount of bubbles are generated on the surface of the treated water in the storage tank 4, and the foam overflows out of the storage tank 4 if left untreated. is there. Therefore, conventionally, a water distribution pipe 5 is provided over the entire inside of the storage tank 4, and a shower 5a is provided at an appropriate portion of the water distribution pipe 5, and water is defoamed by the water spray action from the shower 5a.
However, in order to spray water evenly over the whole of the treated water stored in the storage tank 4, a large number of showers 5a must be provided, and there is a problem that the equipment cost for defoaming becomes expensive. Further, in order to spray water evenly over the entire surface of the treated water by the shower 5a, it is necessary to make the watering holes of the shower 5a as small as possible and provide a large number of watering holes. However, since water is also sprayed from the shower 5a by pumping up the treated water in the storage tank 4, there is a problem that foreign matter mixed in the treated water tends to be clogged in the middle of the water distribution pipe or in the sprinkling hole of the shower 5a. For this reason, cleaning and inspection of the water distribution pipes and showers must be performed frequently, and there is a problem that the work load on the operator is large and the operation rate of the equipment is reduced.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the above-described problems, and an object thereof is to efficiently remove bubbles generated on a fluid surface in a fluid storage tank with a simple device, and It is an object of the present invention to provide a defoaming device for a fluid storage tank that can be easily maintained and inspected by preventing clogging of a shower water hole or the like.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, a defoaming device for a fluid storage tank according to the present invention is a defoaming device that defoams bubbles generated on the surface of a fluid stored in a fluid storage tank by spraying water from a shower. One or a plurality of partition plates for dividing the inside of the fluid storage tank into two or three or more tanks, and a part of the partition plate is cut off, and a bottom portion is located near a fluid surface in the fluid storage tank. and formed notch as a Okoshiryu means for generating a flow from the adjacent Ri fit one bath of the tank partitioned by the partition plate through the cutout portion in the fluid to the other vessel, the notch made from a supply means for supplying a fluid for defoaming the shower placed shower Toko upward, and a water spray means sprays water toward the foam fluid surface flowing through said cutout portion by said Okoshiryu means It is characterized by becoming.
The defoaming device having the above configuration has a great effect by applying the exhaust gas generated when the shell mold is formed to the storage tank provided in the deodorizing device for deodorizing by the water spraying of the treated water in the exhaust gas tower. be able to.
[0007]
[Action]
Since the defoaming device for a fluid storage tank of the present invention is configured as described above, it operates as follows.
The inside of the fluid storage tank is divided into at least two tanks by a partition plate. Since the notch is formed in the partition plate, the fluid in one tank can flow through the notch into the other adjacent tank via the partition plate. The flow of the fluid in the tank can be generated by a starting device such as a pump or a propeller. Further, since the notch is formed such that its bottom is located near the surface of the fluid, the surface of the fluid in which bubbles are generated is efficiently sent to the notch. Since a shower is provided above the notch, bubbles passing through the notch are continuously eliminated by the water spraying action from the shower.
[0008]
In addition, the present invention applied to a deodorizing device for exhaust gas generated during shell mold molding operates as follows.
The exhaust gas rises in the exhaust gas tower, but since a shower is provided above the exhaust gas etc., harmful components in the exhaust gas such as ammonia are dissolved in the treated water by the water spraying action from this shower and it is stored in the lower storage tank. Collected. At this time, a large amount of bubbles is generated on the surface of the treated water in one of the tanks where the treated water falls. The treated water is pumped up from the other tank, and the partition plate between the one tank and the other tank is provided with a notch, so that the flow of the treated water passes through the notch. Then, when the bubbles pass through the cutouts, they are eliminated by the water spraying action from the shower.
[0009]
【Example】
An embodiment of the present invention will be described with reference to the drawings. In the following examples, description will be given assuming that the defoaming device of the present invention is provided in a storage tank for treated water in a deodorizing device for deodorizing exhaust gas generated when a shell mold is formed. Further, in the following embodiments, the configuration of the exhaust gas tower 1 is the same as that shown in the conventional example, and therefore, detailed description is omitted here.
FIG. 1 is a perspective view illustrating a configuration inside a storage tank for storing treated water according to an embodiment of the present invention.
A partition plate 11 is provided at the center of the storage tank 10, and a first tank A and a second tank B are formed on both sides thereof. It is desirable that the partition plate 11 completely shields the first tank A and the second tank B in order to flow the treatment water as efficiently as possible into the notch 13 described later. The treated water sprinkled by the shower 2 from above the exhaust gas tower 1 (see FIG. 2) is collected in the first tank A.
[0010]
A notch 13 is formed by cutting a part of the partition plate 11. The bottom 13a of the notch 13 is located in the vicinity of the surface of the treated water, enables the flow of the treated water from the first tank A to the second tank B, and at the same time, the treated water in the first tank A. The surface efficiently flows into the notch 13. In this embodiment, only one notch 13 is formed at the end of the partition plate 11, but it may be provided at another portion of the partition plate 11. Further, the partition plate 11 may be provided at a plurality of positions.
[0011]
A shower 14 is provided above the notch 13. The water pipe 12 is connected to the shower 14 and is connected to a pump P for pumping up the treated water in the second tank B. That is, the treated water pumped from the second tank B is sent to the shower 14 and sprinkled. The pump P may be common to the pump P for supplying water to the shower 2 provided above the exhaust gas tower 1 (see FIG. 2), or may be provided separately from the pump P described above. In addition, the code | symbol M in the figure is a motor for driving the pump P.
The above-mentioned water distribution pipe 12 and the pump P constitute a treatment water supply means, and the water distribution pipe 12, the pump P, the shower 14 and the like constitute water spray means.
[0012]
By pumping up the treated water in the second tank B by the pump P, the water level in the second tank B is lowered, so that a water flow from the first tank A to the second tank B is generated. That is, the pump P serves as a starting device in this embodiment.
In addition, the starting means for generating the water flow from the first tank A to the second tank B in the treated water is not limited to the above-described pump P, and a screw or a propeller is provided in the treated water and rotated to rotate the water flow. It may be generated.
In addition, by having comprised as mentioned above, it suffices to intensively spray the treated water for defoaming toward the notch 13, and it is not necessary to perform the spraying over a wide range. In addition, the number of the showers can be reduced, so that the shower 14 is hardly clogged. In addition, since the diameter of the water distribution pipe 12 for supplying the treated water to the shower 14 can be increased, the water distribution pipe 12 is less likely to be clogged.
[0013]
Next, the operation of the defoaming device of the present invention having the above configuration will be described.
Part of the treated water pumped up from the second tank B by the pump P is supplied to the shower 2 (see FIG. 2), sprinkled from above the exhaust gas tower 1, and collected in the first tank A. Further, a part of the treated water is supplied to the shower 14 and sprinkled from above the notch 13.
As the treated water is pumped up from the second tank B, the treated water in the first tank A flows into the second tank B through the notch 13. At this time, since the bottom 13a of the notch 13 is located near the water surface of the treated water, bubbles formed on the water surface of the treated water are efficiently sent to the notch 13. Since the treated water is sprinkled from above the notch 13 by the shower 14, bubbles generated on the surface of the treated water flowing through the notch 13 are eliminated.
[0014]
Although the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments. For example, in the above embodiment, the treated water pumped from the second tank B is sprinkled from above the exhaust gas tower 1 by the shower 2 and the sprinkled treated water is collected in the first tank A. In addition to providing another notch on the opposite side of 13 and generating a circulating water flow between the first tank A and the second tank B by a wake-up means such as a propeller, the notch is generated in the first tank A. The foam generated can be eliminated in the notch 13 when flowing into the second tank B, and the foam generated in the second tank B can be eliminated in the other notch when flowing into the first tank A. become able to.
Further, in this embodiment, the storage tank 10 of the treated water in the deodorizing device for the exhaust gas generated during shell molding has been described as an example, but the present invention can be applied to other fluid storage tanks.
[0015]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained.
The tank is divided by the partition plate, and a water flow is generated by the wake-up means so that the bubbles flow efficiently in the notch. The defoaming is performed intensively in the notch. The number of showers can be greatly reduced, and the equipment cost for defoaming can be reduced.
In addition, the water sprinkling hole of the shower can be enlarged, and the water distribution pipe for supplying fluid to the shower can be made thick, so that clogging of the shower and the water distribution pipe can be prevented. Therefore, the workload of maintenance, inspection and the like is reduced, and the operation rate of the equipment is improved.
[Brief description of the drawings]
FIG. 1 is a perspective view of a storage tank and a defoaming device according to an embodiment of the present invention.
FIGS. 2A and 2B are schematic views showing a general configuration of a deodorizing apparatus according to a conventional example of the present invention, and FIG. 2B is a perspective view showing a fluid storage tank provided at a lower part of the deodorizing apparatus.
[Explanation of symbols]
1 exhaust gas tower 2 shower 3 baffle plate 4,10 storage tank (fluid storage tank)
5 Water distribution pipe 5a Shower 11 Partition plate 12 Water distribution pipe 13 Notch 13a Bottom part 14 Shower 14a Watering hole A First tank B Second tank P Pump (starting means)
M motor

Claims (2)

In a defoaming device that defoams foam generated on the surface of the fluid stored in the fluid storage tank by water spraying action from a shower,
One or more partition plates (11) for dividing the inside of the fluid storage tank into two or three or more tanks;
A notch (13) formed by notching a part of the partition plate so that the bottom (13a) is located near the fluid surface in the fluid storage tank;
This notch through Okoshiryu means for generating a flow in the fluid from the adjacent Ri fit one tank to the other tank of said vessel partitioned by the partition plate (P),
The result from the notch shower disposed above the (14) supply means for supplying fluid for Toko showers defoaming (12, P), through the cutout portion by said Okoshiryu means (P) Watering means for watering the bubbles on the surface of the flowing fluid;
A defoaming device for a fluid storage tank, comprising: Wherein the fluid reservoir is in the deodorizing device for deodorizing an exhaust gas generated during molding of the shell mold, the exhaust gas tower for removing harmful components contained in exhaust gas by sprinkling action from shower (2) (1) The defoaming device for a fluid storage tank according to claim 1, characterized in that it is a storage tank (10) for treated water provided at a lower part.

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