JP2020018211A - Foam separation device and breeding device with the same - Google Patents

Abstract

To suppress leakage of ozone in a foam separation device where the ozone is introduced.SOLUTION: A foam separation device 22 has: a body container 31 provided with a first opening in the top; an inner cylinder extending upward in the inside of the body container 31 from a bottom surface or a side surface of a body container 31, and terminating at the lower part of the top; supply means for supplying a gas-liquid mixture of gas and liquid containing ozone in one side of an inside space and an outside space partitioned by the inner cylinder; a discharge port for discharging the purified gas-liquid mixture from the other side of the inside space and the outside space; a bubble collection unit 32 provided in the upper part of the body container 31, connected to the body container 31 in the first opening, provided with a second opening in the top, and collecting bubbles generated from the gas-liquid mixture and flowing from the first opening; and a lid 51 for closing the second opening in the openable and sealable manner.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a foam separation device and a breeding device provided with the same.

  In a breeding apparatus for breeding aquatic animals, there is a case where constant purification of water stored in an aquarium is required. A purification method using a foam separation device as a means for purifying stored water is known. The outline of this method is as follows. First, the stored water in the water tank is extracted, and air is mixed into the extracted stored water to form a gas-liquid mixture containing fine air. The gas-liquid mixture is introduced into a foam separator. The gas-liquid mixture rises in the internal space of the foam separation device while the minute bubbles adhere to organic substances and bacteria. Some of the bubbles become foam and are introduced into the foam recovery section connected to the top of the foam separator and collected. The purified gas-liquid mixture forms a downward flow, is separated from the foam, and is discharged from the discharge port.

  Patent Literature 1 discloses that an ozone generator is connected to a foam separator in order to sterilize stored water.

Japanese Patent No. 4754881

  Most of the foam introduced into the foam collection section is discharged to the outside, but a part of the foam is liquefied and remains in the foam collection section as contaminated water. For this reason, in order to periodically collect the contaminated water, a lid that can be opened and closed is provided at the top of the foam collection unit. However, the lid is only placed at the top opening of the foam collection section for easy opening and closing. When introducing a gas containing ozone into the foam separator, since the foam contains ozone, if there is a gap between the lid and the foam recovery unit, toxic ozone may leak from the foam recovery unit.

  An object of the present invention is to provide a configuration in which leakage of ozone can be suppressed in a foam separation device into which ozone is introduced.

  A foam separation device according to the present invention includes a main body container having a first opening at the top, an inner cylinder extending upward inside the main body container from a bottom surface or a side surface of the main body container, and terminating below the top portion; Supply means for supplying a gas-liquid mixture of gas and liquid containing ozone to one of the inner space and the outer space partitioned by, and a discharge port for discharging the purified gas-liquid mixture from the other of the inner space and the outer space, A foam collection unit provided above the main body container, connected to the main body container at the first opening, provided with a second opening at the top, and collecting foam generated from the gas-liquid mixture and flowing from the first opening; And a lid that closes and closes the second opening so that it can be opened and closed.

  According to the present invention, leakage of ozone can be suppressed in a foam separation device into which ozone is introduced.

It is a schematic structure figure of a breeding device provided with a foam separation device. It is a schematic diagram of a foam separation device concerning one embodiment of the present invention. It is a schematic structure figure of a foam separation device. It is a figure which shows one form of the sealing means of a lid and a foam collection part of a foam separation apparatus. It is a figure which shows one form of the sealing means of a lid and a foam collection part of a foam separation apparatus. It is a figure which shows one form of the sealing means of a lid and a foam collection part of a foam separation apparatus.

  Several embodiments of the present invention will be described with reference to the drawings. First, a schematic configuration of the breeding apparatus will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of the breeding apparatus.

  The breeding apparatus 1 has a water tank 2 and a gantry 3 on which the water tank 2 is placed. The water tank 2 is formed of an acrylic plate, and has a substantially rectangular parallelepiped shape. A purifier 11 for purifying stored water in the water tank 2 is disposed inside the gantry 3.

  FIG. 2 is a schematic configuration diagram of the breeding apparatus 1. Inside the water tank 2, at least a pipe 12 having a double pipe configuration is provided. The pipe 12 supplies the water stored in the water tank 2, which is the water to be treated, to the purification device 11, and returns the treated water treated by the purification device 11 to the water tank 2. The pipe 12 is connected to the raw water supply pipe 13 at the bottom of the water tank 2. The water to be treated is supplied from a raw water supply pipe 13 to a raw water tank 14, and is temporarily stored in the raw water tank 14. The water to be treated stored in the raw water tank 14 is sent to a strainer 16 by a raw water pump 15 to remove relatively large foreign matter, and further a fine foreign matter is removed by a filter 17. As the filter 17, an ultrafiltration membrane (UF filter), a microfiltration membrane (MF filter), or the like can be used.

  The outlet of the filter 17 is connected to an activated carbon raw water tank 18. The water to be treated stored in the activated carbon raw water tank 18 is introduced into an activated carbon device 20 by an activated carbon raw water pump 19. Since the water to be treated may contain ozone as described later, ozone that may be contained in the water to be treated is removed by the activated carbon device 20. The water to be treated from which ozone has been removed is introduced into the temperature control device 21 and temperature-controlled. The temperature control device 21 includes a cooling chiller (not shown), a heating heater (not shown), or both of them, but depending on the installation environment of the breeding device 1, one of these is omitted. The temperature control device 21 itself can be omitted. The temperature control device 21 is connected to the return pipe 25, and the return pipe 25 is connected to the pipe 12 at the bottom of the water tank 2. The purified water whose temperature has been adjusted is returned to the water tank 2 through the return pipe 25 and the pipe 12 as treated water.

  On the other hand, a part of the water to be treated that has exited the filter 17 is introduced into the foam separator 22. The water to be treated may be continuously introduced into the foam separator 22 or may be introduced into the foam separator 22 as needed. The foam separation device 22 includes a bubble supply device (not shown), and introduces minute bubbles into the water to be treated. The bubbles rise inside the foam separation device 22 while adhering organic substances, bacteria, and the like, and are captured by the foam recovery unit 32 at the upper part. The foam separation device 22 is connected to an ozone supply device 23 that supplies ozone gas. Ozone not only traps organic substances and bacteria as air bubbles, but also decomposes organic substances in the water to be treated. The decomposed organic matter is also removed by the foam. The foam separator 22 is connected to the raw water tank 14 via a return pipe 26, and the water to be treated from which organic substances and bacteria have been removed is returned to the raw water tank 14. For this reason, the water to be treated stored in the raw water tank 14 may contain ozone in some cases. An ozone decomposition catalyst device 24 is connected to the foam separation device 22. The ozone decomposition catalyst device 24 decomposes ozone discharged from the foam separation device 22. The decomposed waste ozone can be discharged to the outside by measuring the ozone concentration as needed. In addition, since foam is easily generated in seawater, when the foam separation device 22 is used, the water to be treated is preferably seawater. The outlet of the treated water is preferably provided at a position away from the inlet of the treated water so that the treated water discharged from the outlet of the treated water in the pipe 12 is not sucked into the inlet of the treated water. .

  Thus, the water to be treated passes through the pipe 12, the raw water supply pipe 13, the raw water tank 14, the raw water pump 15, the strainer 16, the filter 17, the activated carbon raw water tank 18, the activated carbon raw water pump 19, the activated carbon device 20, and the temperature control device 21. Then, it becomes treated water (purified stored water), and is returned to the water tank 2 through the return pipe 25 and the pipe 12. Further, a part of the water to be treated is purified by the foam separation device 22, then returned to the raw water tank 14, and returned to the water tank 2 through the above-described facility. In this way, the stored water in the water tank 2 is circulated and purified, so that the amount of fresh water to be externally supplied can be suppressed.

  Next, the configuration of the foam separation device 22 will be described in more detail with reference to FIG. The foam separation device 22 has a main body container 31 and a foam recovery section 32 provided above the main body container 31. Each of the main body container 31 and the foam recovery section 32 has a cylindrical shape, and is made of a transparent resin. In particular, when the foam recovery section 32 is made of a transparent resin, the contaminated water staying inside can be visually checked. A first opening 35 is provided at the top 34 of the main body container 31. A screw (not shown) is cut on a side surface of the first opening 35. An inner cylinder 33 extends upward from the bottom surface 36 of the main body container 31 inside the main body container 31 and terminates below the top 34. Therefore, the space from the bottom surface 36 of the main body container 31 to the top 33 a of the inner cylinder 33 is partitioned by the inner cylinder 33 into an inner space 37 and an outer space 38. On the other hand, the space 39 above the top 33 a of the inner cylinder 33 of the main body container 31 is an integrated space that is not partitioned by the inner cylinder 33. The inner cylinder 33 may extend obliquely upward from the side surface 40 of the main body container 31 and may extend upward and downward.

  A supply pump 41 is provided outside the main body container 31. The inlet pipe 42 of the supply pump 41 is connected to the filter 17, and the water to be treated, from which foreign matter has been removed by the filter 17, is supplied to the supply pump 41. The inlet pipe 42 is connected to the ozone supply device 23, and a gas-liquid mixture of gaseous ozone and water to be treated is generated inside the inlet pipe 42. As the gas, air may be further introduced into the water to be treated. In other words, the gas-liquid mixture is a mixture of the gas containing ozone and the liquid to be treated. An outlet pipe 43 connected to an outlet of the supply pump 41 penetrates the main body container 31 and the inner cylinder 33 and communicates with the inner space 37, and the gas-liquid mixture is supplied to the lower part of the inner space 37 by the supply pump 41. . The supply pump 41, the ozone supply device 23, and the outlet pipe 43 constitute supply means for supplying a gas-liquid mixture of a gas and a liquid containing ozone to the inner space 37.

  The outer space 38 is provided with a discharge port 44 for discharging the gas-liquid mixture. The discharge port 44 is connected to a discharge pipe 45, and the discharge pipe 45 is connected to the raw water tank 14 via a return pipe 26. The discharge pipe 45 has a rising portion 46. The rising portion 46 extends above the top 33 a of the inner cylinder 33. Thereby, the water level of the water to be treated in the main body container 31 can be maintained high, and the foam can be efficiently pushed upward. However, it is preferable that the height of the highest portion of the rising portion 46 be substantially equal to the height of the first opening 35 so that the water to be treated does not flow out of the first opening 35 of the main body container 31.

  The foam collection unit 32 is connected to the main body container 31 at the first opening 35, and collects the foam flowing from the first opening 35. Specifically, the foam collection unit 32 includes a foam collection container 47 and a hollow cylindrical portion 48 that penetrates the bottom surface 47a of the foam collection container 47. The end of the side surface of the tubular portion 48 is threaded and engages with the thread cut on the side surface of the first opening 35, thereby fixing the foam recovery unit 32 to the main body container 31. The periphery of the cylindrical portion 48 is a ring-shaped space 49 in which contaminated water is stored. A second opening 50 is provided at the top of the foam collection container 47 and is covered with a lid 51. A ring-shaped flange 52 for positioning is provided on the inner surface of the lid 51. The lid 51 is positioned with respect to the foam collection container 47 such that the flange 52 contacts the outer side surface of the foam collection container 47. A ring-shaped packing 53 is provided on the inner surface of the lid 51. A nozzle 54 is provided on the outer surface of the lid 51. A tube 55 connected to the ozone decomposition catalyst device 24 is attached to the nozzle 54.

  The foam separation device 22 of the present embodiment operates as follows. The gas-liquid mixture in which ozone is introduced into the liquid to be processed is supplied to the lower part of the inner space 37 of the main container 31 through the supply pump 41 and the inlet pipe 42. The gas-liquid mixture rises in the inner space 37 while bubbles of ozone (and air bubbles when air is introduced) adhere to organic substances and bacteria. In this process, the water to be treated is sterilized by ozone, and some of the bubbles reach the surface of the water to be treated and become foam. That is, foam is generated from the gas-liquid mixture. Organic substances, bacteria, and the like are attached to the foam and contain ozone. The foam is pushed up by the gas-liquid mixture, and flows into the foam recovery unit 32 from the first opening 35. On the other hand, the purified gas-liquid mixture passes through the inner cylinder 33, enters the outer space 38, and descends the outer space 38. The gas-liquid mixture is discharged from the discharge port 44 to the discharge pipe 45, rises again at the rising portion 46, and is supplied to the raw water tank 14. On the other hand, the foam flowing into the foam recovery unit 32 from the first opening 35 is discharged from the foam recovery unit 32 through the nozzle 54 of the lid 51, and is processed by the ozone decomposition catalyst device 24. Part of the foam flows into the ring-shaped space 49 around the cylindrical portion 48 beyond the top of the cylindrical portion 48, liquefies with time, and stays as contaminated water.

  In the present embodiment, the gas-liquid mixture of the water to be treated and ozone is supplied to the inner space 37, but may be supplied to the outer space 38, that is, the gas-liquid mixture rises in the outer space 38, and the foam is Is formed, and the purified gas-liquid mixture may descend in the inner space 37. Although not shown, the discharge pipe 45 may be built in the main body container 31. In this case, a partition wall that partitions the outer space 38 in the radial direction is provided (that is, the main body container 31 has a triple cylinder configuration), and the liquid to be treated that has descended in the inner space of the partition wall is turned upward at the lower end of the partition wall by a U-turn. Then, a configuration in which the space outside the partition wall is raised and discharged from a nozzle provided on the outer wall of the main body container 31 can be adopted. In this embodiment, ozone is introduced into the inlet pipe 42, but may be introduced directly into the main container 31. If there is no problem in pressure, the supply pump 41 may be omitted.

  As described above, in the present embodiment, ozone is used as a purification unit. However, since ozone is toxic, it is necessary to suppress leakage from the foam separation device 22 as much as possible. Since the main body container 31 and the foam recovery section 32 are connected by screws, high airtightness can be ensured. On the other hand, although the packing 53 is provided between the lid 51 and the second opening 50 of the foam recovery section 32, the lid 51 is merely placed on the top of the foam recovery section 32, Does not have good airtightness. Therefore, as shown in FIG. 4, a sealing means 60 for ensuring airtightness between the second opening 50 and the lid 51 is provided (note that the nozzle 54 is not shown in FIG. 4). The sealing means 60 is a sandwiching means 61 for sandwiching the lid 51 and the foam recovery section 32. The sandwiching means 61 has two pairs of rod members 62 and two pairs of fasteners 63. The first rod-shaped member 62a and the second rod-shaped member 62b form a pair, and the third rod-shaped member 62c and the fourth rod-shaped member 62d form another pair. Further, the first fastener 63a and the second fastener 63b form a pair, and the third fastener 63c and the fourth fastener 63d form another pair. The first to fourth rod-shaped members 62a to 62d are rods having a rectangular cross section, and holes 64 are provided in both end regions in the longitudinal direction. Each of the first to fourth fasteners 63a to 63d includes a long bolt 65, a pair of nuts 66, and a pair of washers 67 whose both end portions are threaded. It is preferable that the upper surface of the lid 51 and the lower surface of the foam recovery unit 32 are flat.

  The first to fourth rod-like members 62a to 62d and the first to fourth fasteners 63a to 63d are attached as follows. First, the first rod-shaped member 62a is positioned so that the central portion in the longitudinal direction abuts on the upper surface of the lid 51, and both ends protrude from the lid 51, and the second rod-shaped member 62b is collected in the central portion in the longitudinal direction. It is in contact with the lower surface of the part 32 and is positioned so that both ends protrude from the foam collecting part 32. Similarly, the third rod-shaped member 62c is positioned so that the central portion in the longitudinal direction abuts on the upper surface of the lid 51, and both ends protrude from the lid 51, and the fourth rod-shaped member 62d is foamed in the central portion in the longitudinal direction. It is in contact with the lower surface of the collecting section 32 and is positioned so that both ends protrude from the foam collecting section 32. The first rod-shaped member 62a and the second rod-shaped member 62b are opposed to each other with the lid 51 and the foam recovery section 32 interposed therebetween, and the third rod-shaped member 62c and the fourth rod-shaped member 62d are also disposed between the lid 51 and the foam recovery section 32. Oppose. It is desirable that the first and second rod-shaped members 62a and 62b and the third and fourth rod-shaped members 62c and 62d are arranged at positions substantially symmetrical with respect to a line passing through the center of the lid 51. The bolt 65 is passed through the opposing holes 64 of the first rod-shaped member 62a and the second rod-shaped member 62b, and the washer 67 and the nut 66 are inserted from both ends of the bolt 65, and the nut 66 is fastened. Similarly, a bolt 65 is passed through holes 64 of the third rod-shaped member 62c and the fourth rod-shaped member 62d facing each other, a washer 67 and a nut 66 are inserted from both ends of the bolt 65, and the nut 66 is fastened. Thereby, the lid 51 and the foam recovery unit 32 are fastened by the first to fourth rod-shaped members 62a to 62d and the first to fourth fasteners 63a to 63d, and the second opening of the lid 51 and the foam recovery unit 32 The airtightness between 50 and 50 is ensured.

  The content of the maintenance after opening the lid 51 is mainly the removal of the contaminated water staying in the ring-shaped space 49 of the foam recovery unit 32. The method of removing the contaminated water is not limited. For example, a method of inserting a thin tube into the inside and sucking out the contaminated water by a siphon effect may be used. Since only the tube is inserted, it is only necessary to loosen the first to fourth fasteners 63a to 63d and to shift the lid 51 with respect to the foam recovery unit 32 to the extent that the tube can be inserted. Since the tube 55 attached to the nozzle 54 of the lid 51 has flexibility, it is not necessary to remove the tube 55 from the nozzle 54. In addition, since there is a possibility that dirt attached to the foam recovery unit 32 cannot be completely removed by this operation alone, the foam recovery unit 32 may be detached from the main body container 31 for cleaning. In that case, the first to fourth fasteners 63a to 63d are loosened, the first to fourth rod-like members 62a to 62d are removed, the tube 55 is removed from the nozzle 54, and the foam recovery unit 32 is removed from the main body container 31.

  According to the present embodiment, the hermeticity between the foam recovery unit 32 and the lid 51 can be ensured with such a simple configuration. In particular, in this embodiment, the increase in the height of the foam separation device 22 due to the provision of the sealing means 60 depends on the thickness of the rod member 62 attached on the upper side and the length of the bolt 65 protruding from the rod member (or the nut 66 and the nut 66). Sum of the thickness of the washer 67), which is extremely limited. When the breeding apparatus 1 is installed in an aquarium or the like, children and infants may be viewers, and it may not be desirable to make the gantry 3 too high. Since the foam separator 22 has a relatively high overall height, it may be a determinant of the height of the gantry 3. However, even in such a case, the influence on the height of the gantry 3 can be suppressed. In this embodiment, the upper nut 66 is a wing nut, and the lower nut 66 is a flat nut to operate the upper wing nut. However, the upper nut 66 is a flat nut, and the lower nut 66 is a flat nut. By operating the lower wing nut as the wing nut, the influence on the height of the gantry 3 can be further reduced.

  In addition, in the present embodiment, a commercially available foam separation apparatus can be used almost as it is, except for the lid 51, and therefore, there is a great cost advantage. That is, since a commercially available foam separator does not use ozone, a hole for ventilation may be provided in the lid, and the surface of the lid is not always flat. In the present embodiment, the above-described lid 51 is used, but a commercially available product can be used for other portions.

  FIG. 5 shows another embodiment 160 of the sealing means. The lid 151 has an outer peripheral portion 68 protruding from the side wall of the foam recovery portion 32, and the foam recovery portion 32 has a flange portion 69 facing the outer peripheral portion 68. The outer peripheral portion 68 and the flange portion 69 are provided with a plurality of holes 164 through which the bolts 65 pass. The sealing means 160 is a fastening means 161 for fastening the lid 151 and the flange 69. The bolt 65, the nut 66, and the washer 67 shown in FIG. 4 can be used as the fastening means 161.

  FIG. 6 shows another embodiment 260 of the sealing means. The sealing means 260 includes a protruding portion 71 protruding from the inner surface of the lid 251 toward the foam collecting portion 32 and having a male screw 70 formed on the outer peripheral surface, and a female screw 72 formed on a side surface of the foam collecting portion 32 and engaging with the male screw 70. It is. This embodiment is disadvantageous from the viewpoint of the influence on the height of the gantry 3 because the lid 251 needs to be positioned above the second opening 50 of the foam recovery unit 32 when attaching and detaching the lid 251. However, since it can be opened and closed with a single operation, the operability is excellent.

DESCRIPTION OF SYMBOLS 1 Breeding apparatus 2 Aquarium 3 Stand 11 Purification apparatus 22 Foam separation apparatus 23 Ozone supply apparatus (supply means of gas-liquid mixture)
31 main body container 32 foam collection part 33 inner cylinder 35 first opening 41 supply pump (gas-liquid mixture supply means)
43 outlet pipe (means for supplying gas-liquid mixture)
44 discharge port 50 second opening 51, 151, 251 lid 60, 160, 260 sealing means 61, 161 sandwiching means 62 rod-shaped member 63, 163 fastener 69 flange

Claims (6)

A main body container having a first opening at the top;
An inner cylinder extending upward from the bottom or side surface of the main body container inside the main body container, and terminating below the top portion;
Supply means for supplying a gas-liquid mixture of gas and liquid containing ozone to one of the inner space and the outer space partitioned by the inner cylinder,
A discharge port for discharging the purified gas-liquid mixture from the other of the inner space and the outer space;
It is provided above the main body container, is connected to the main body container at the first opening, and is provided with a second opening at the top, and collects foam generated from the gas-liquid mixture and flowing from the first opening. A foam collection unit
A lid for closing the second opening so as to be openable and closable.   The foam separation device according to claim 1, further comprising a sandwiching unit that sandwiches the lid and the foam recovery unit.   The sandwiching means has two pairs of rod members and two pairs of fasteners, each pair of the rod members opposing each other with the lid and the foam collection portion interposed therebetween at the center portion, and both end portions are paired with each other. The foam separation device according to claim 2, wherein the foam separation device is fastened by the fastener.   The said lid has an outer peripheral part which protruded from the side wall of the said foam collection | recovery part, the said foam collection | recovery part has a flange part facing the said outer peripheral part, and further has the fastening means which tightens the said lid and the said flange part. Item 7. A foam separation device according to Item 1.   The lid has a protruding portion in which a male screw is formed on a side surface protruding from the inner surface of the lid toward the foam recovery unit, and a female screw that engages with the male screw is formed on an inner surface of the foam recovery unit. The foam separation device according to claim 1. An aquarium,
The foam separation device according to any one of claims 1 to 5, which purifies stored water in the water tank.
A breeding apparatus comprising: a circulating path that supplies the water stored in the water tank to the foam separation device and returns the stored water purified by the foam separation device to the water tank.

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