JPH02233108A - Method and apparatus for removing foam substance - Google Patents

Abstract

PURPOSE:To effectively remove foam substance by forming the lower part of the foam stop body opposed to the upstream of flowing water on the side of the foam receiving surface thereof to a water current running-on slope to moor the same on the way of a water channel in the lateral direction thereof. CONSTITUTION:The foam substance B flowing down through a water channel WL while floating on the surface of flowing water W is prevented from flowing down by the rectangular foam stop body 20 floating on the surface of the flowing water on the way of the water channel to be removed thereby. At this time, the lower part of the foam stop body 10 opposed to the upstream of the flowing water on the side of the foam receiving surface thereof is formed to a water current running-on slope 20 and moored on the way of the water channel over the lateral direction thereof to receive the foam substance. By this simple constitution, the removal if the foam substance can be effectively realized. Especially, since the foam stop body is composed of a lightweight body floating on the surface of the flowing water, the foam substance floating on the surface of the flowing water to flow down can be effectively collected and removed without obstructing the water current.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is directed to a foam material that removes foam material floating down the flowing water surface in a river or the like midway through a waterway and prevents it from flowing downstream. This article concerns removal methods and equipment. <Prior art> Waterways where turbid water such as industrial waste liquid and domestic wastewater flows in a turbulent flow, such as near estuary weirs where river tributaries join together, and agricultural waterways where sprayed pesticides, etc. In waterways where mixed flows occur, foam substances such as foam, suspended liquid waste such as oil, and fine dust may be generated on the flowing water surface.

In the case of so-called clean water, these foaming substances are almost instantaneous and disappear immediately, but in the case of non-clean water, they float in a foamed state and flow downstream. There is. Even if the foam substance itself is harmless, it often gives an unpleasant appearance and it is necessary to take some kind of removal method such as defoaming.

Possible means for removing foam substances include, for example, installing a retention tank in the middle of the waterway where no water flows to scoop out the foam, or installing a bottle and discharging the so-called top water into a separate flow path, but the effectiveness is limited. This tended to be a large-scale measure, and it lacked practicality.

The present invention is intended to provide a solution to the conventional problems as described above, and its purpose is to provide a foam material that can be effectively removed by simple and inexpensive means. A removal method and apparatus for the same are now available.

<Means for Solving the Problems> In order to achieve the above object, the present invention prevents foam substances floating down the flowing water surface of a waterway from flowing down by a rectangular foam stopper that floats on the flowing water surface midway through the waterway. This is a means for removing bubbles, and the lower part of the bubble receiving surface of the bubble stopper facing upstream of the flowing water is formed into a slope on which the water flow rides, and is moored in the middle of the waterway in the width direction to catch the foam substances. In this case, the bubble stopper is provided with a plurality of elongated holes in a plan view perpendicular to the water flow direction, penetrating from the top surface to the bottom surface of the bubble stopper, so that the bubble can be retained on the bubble receiving surface side. The foam substance that has passed through the side can be sequentially retained in the elongated hole in plan view.

Furthermore, by providing a shower device on the rectangular anti-foaming body to spray water on the stagnant foam substance, the foam can be extinguished on the flowing water surface.

(Function) As the foam material generated upstream of the waterway floats down, it is received by the foam receiving surface, which is the front of the foam stopper moored and floating above the flowing water surface, and is sequentially retained at that position.Therefore, The accumulated foam substance is removed by an appropriate foam scooping device at that location.
Remove using foam inhaler, etc. Alternatively, a shower device may be used to sprinkle water on the accumulated foam substance to thereby eliminate the foam, and settings may be made as appropriate depending on the surrounding environment, removal conditions, etc.

By forming the lower part of the bubble-receiving surface side into a slope on which the water flow runs over, the bubble stopper prevents the water flow from running over the water flow without increasing the receiving pressure on the foam-receiving surface even if the flow rate fluctuates midway and the water flow pressure increases. The above-mentioned pressure is alleviated on the slope and the bubble stopper is kept floating in the appropriate position. In addition, by providing a plurality of elongated holes in plan view perpendicular to the water flow direction that penetrate from the top surface to the bottom of the bubble stopper, it is possible to receive the bubbles on the front side of the bubble stopper, which is the bubble receiving surface side. The foam substance that attempts to flow out through the lower surface of the foam stopper can be blocked by the elongated hole in plan view, and a better device can be constructed.

<Embodiments> Preferred embodiments for carrying out the present invention will be described below based on the drawings. FIG. 1 is a perspective view showing the configuration of a first embodiment of a foam stopper used in the foam substance removal means of the present invention;
The figure is a perspective view of a bubble stopper according to a second embodiment. First, in the first embodiment, the bubble stopper 1 is constructed to be a lightweight object having a rectangular shape in plan view and an appropriate thickness. This lightweight means that it can float on the surface of flowing water, and preferably, the configuration is such that the height of the upper part of the stutter is about twice the depth of the lower part of the stutter. For this reason, specifically, for example, a hollow box body made of styrofoam, urethane foam, wood, or metal is used for molding. However, the lower side of one side of the bubble stopper 1 of the lever is cut out across the bottom surface to form a slope 2. When the anti-bubble body 1 is installed in a waterway, this side surface faces the upstream side of the flowing water and becomes the bubble receiving surface 3, and the above-mentioned slope constitutes the slope 2 on which the water flow rides, and the so-called sled function increases the speed of the flowing water. The pressure of the flowing water on the bubble receiving surface 3 is relaxed against such fluctuations.

In the illustrated example, the bubble-receiving surface 3 is not a vertical surface but is slightly inclined downward to produce a slight water flow riding effect, but in reality, the water flow riding slope 2 at the bottom is effective. ．． If the inclination angle of the slope 2 on which the water flow runs is too small with respect to the flowing water surface, the pressure of the flowing water applied to the bubble receiving surface 3 may cause the bubble receiving surface 3 side to sink into the water depending on the situation. Similarly to the case where the bubble receiving surface 3 is small, the foam receiving surface 3 side may be submerged in water due to the load pressure on the foam receiving surface 3. Therefore, assuming various flowing water conditions, the water flow running slope 2 is approximately 3
It has been experimentally found that an inclination of about 0 degrees is generally preferable.

Next, the bubble stopper 10 according to the second embodiment shown in FIG. 2 is similar to the first embodiment in terms of material and appearance, but in order to increase versatility and improve performance. , bubble stopper 1
0 from the top surface 10a to the bottom surface 10b, in a direction perpendicular to the water flow direction, in other words, the bubble receiving surface 3 of the bubble stopper 10.
The difference from the first embodiment is that a plurality of holes 40, which are elongated in plan view in a direction parallel to 0, are provided.

In the illustrated example, three (3) holes 40, which are elongated in plan view, are provided, but they can be set as appropriate depending on the size of the bubble stopper 1O, etc. FIG. 3 shows a first embodiment of the foam substance removal device in which the bubble stopper IO of the second embodiment is installed in the waterway WL. In the figure, WL is a waterway, W is running water flowing through the waterway WL, and B is foam material floating and flowing down the upper surface of the running water W.
A bubble stopper IO moored by a mooring rope R is floating on the water surface of this waterway WL. The bubble stopper 10 has its bubble receiving surface 30 facing the upstream side of the flowing water W, and its width is formed to be almost the same as the width of the waterway WL, so that the side surface of the bubble stopper 10 and the waterway WL are formed to have almost the same width. This prevents foam substance B from easily flowing out from the gap between the wall and the wall. According to such a device, when the foam substance B floats down from the upstream side of the flowing water, it is received by the bubble receiving surface 30 which is on the front side with respect to the upstream side at the position of the bubble stopper 10 floating on the flowing water surface. further flow is prevented. As a result, the foam substance B sequentially stays at that position, and can be discharged from the water surface by appropriate means, such as scooping or suction.

By the way, in the above case, when the speed of the flowing water W is high, if the water current causes the bubble stopper 10 to float up on the water surface, a part of the foam substance B will fall onto the bubble stopper 1.
In some cases, the liquid may try to flow downstream through the bottom surface of the 0. At this time, the hole 40, which is long in plan view and is provided in the middle part of the bubble stopper 10, has the same function as the bubble receiving surface 30,
This will trap the foam substance B that flows out.

In addition, when the water flow riding slope 20 is not formed, the floating posture changes depending on the water flow pressure depending on the speed of the flow water W is high or the depth of the lower part of the bubble stopper 10, etc., and the bubble receiving surface which is the front side The 30 side may be submerged in water, making it impossible to receive the foam substance B, or in extreme cases, the rear side may lift up and block the flowing water W. Also,
In such a case, there is a fear that the bubble stopper 10 may be damaged. However, in the present invention, the water flow running slope 20 is formed at an appropriate angle, so that even if a sudden change in flow rate or flow speed occurs, the attitude can be maintained appropriately in response to the sudden change in flow rate or flow speed.
It can perform the intended function.

FIG. 4 shows a second embodiment of the foam removal device.
In this embodiment, when the width of the waterway WL is relatively large, a plurality of unit-sized bubble stoppers 10 (corresponding to the width) are installed.
In the figure, two of them are connected horizontally, and they can also be arranged in series at intervals in the water flow direction. In this way, by arranging them in series, the anti-foaming effect can be further enhanced. By appropriately combining the anti-foam bodies 10, it is possible to adopt a configuration suitable for the situation of the waterway WL to be installed. FIG. 5 shows a third embodiment of the foam removal device. That is, in the former two embodiments, appropriate scooping, suction, etc. were used to remove the accumulated foam substance B from the flowing water surface, but in this third embodiment, the foam stopper IO A shower device 50 is installed in the shower device 50 to spray water on the accumulated foam substance B to defoam it.
Shower water can be obtained by pumping up the running water W using a bomb. According to such a means, it is not necessary to prepare the above-mentioned scooping device, etc., and the equipment can be easily and inexpensively installed.

In the embodiment of the device configuration described above, the foam stopper shown in the embodiment shown in FIG. 2 was used, but even if the foam stopper l according to the embodiment shown in FIG. It goes without saying that the purpose can be fully achieved. However, since the bubble stopper l shown in FIG. 1 has a bubble-receiving function only on the front-side bubble-receiving surface 3, it may not be possible to sufficiently receive bubbles depending on the situation, such as when the water flow is fast as described above. Therefore, this bubble stopper 1 is suitable for use in a relatively calm waterway WL, and the bubble stopper 1O shown in FIG. 2 can be adapted to a relatively wider range of water flow conditions. , it can be said that it is more versatile. <Effects of the Invention> As described above in detail, according to the present invention, foam substances can be removed extremely effectively with a simple configuration. In particular, since the foam stopper is a lightweight item that floats on the surface of the flowing water, it is possible to effectively capture and remove foam substances floating on the flowing water surface without obstructing the water flow. The equipment can also be made simple. Moreover, since the bubble stopper is in a floating position on the flowing water surface and also forms a slope on which the water flow rides, it hardly disturbs the water flow. It also prevents problems such as the generation of new bubbles.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the shape and configuration of a bubble stopper according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a bubble stopper according to a second embodiment. Fig. 3 is a structural perspective view showing a first embodiment of the foam substance removal device in which the bubble stopper shown in Fig. 2 is installed in a waterway, and Fig. 4 is a second embodiment of the foam substance removal device. Fig. 5 is a perspective view of the structure of a third embodiment of the foam substance removal device. l・10・Bubble stopper, 2・20・Slope for water flow, 3・30・Bubble receiving surface, 4・4Ro・・Plane long hole, 50・Shower device, B...foam substance, R...
Mooring lobe, W... flowing water, WL-... waterway. Figure 1 21! I Patent applicant Kajima Construction Co., Ltd.

Claims (4)

[Claims] (1) A method of preventing and removing foam substances floating down the flowing water surface of a waterway by using a rectangular foam stopper that floats on the water surface midway through the waterway, the foam receiving surface of the foam stopper facing upstream of the flowing water. A method for removing foamy substances, characterized in that the lower side is formed into a slope on which water flows and is moored in the middle of a waterway in the width direction to receive foamy substances. (2) A device that removes foam substances floating down the flowing water surface of a waterway from the flowing water surface in the middle of the waterway, which includes a foam receiving surface that faces the upstream side of the flowing water when a rectangular bubble stopper that floats on the flowing water surface is installed in the water channel. A foam substance removal device characterized by forming a slope on the lower side of the water flow and mooring it across the width of the waterway. (3) The foam substance removal device according to claim 2, characterized in that a plurality of holes are provided that penetrate from the top surface to the bottom surface of the rectangular foam stopper and are elongated in plan view orthogonal to the water flow direction. Foam removal equipment. (4) In the foam substance removal device according to claim 2 or 3,
A foam substance removal device characterized in that a rectangular foam stopper is provided with a shower device for sprinkling water on accumulated foam substances.