JP2928054B2 - Gas-liquid mixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to the use of oxygen,
The present invention relates to a gas-liquid mixing device for mixing and dissolving gases such as ozone and carbon dioxide.

[0002]

2. Description of the Related Art Ornamental fish such as goldfish and tropical fish, aquatic plants, and algae have been widely put into aquariums for viewing. When an ornamental fish is placed in an aquarium for a long time and watched at home, the breathing of the ornamental fish causes a lack of oxygen, and the excrement produced by the fish contaminates the water. Aeration system is installed,
In some cases, an ozone supply device may be additionally provided.

[0003] On the other hand, aquariums containing only plants such as aquatic plants and algae are also used for ornamental purposes. In this case, plants absorb carbon dioxide gas in the water during the daytime and release oxygen by interaction with sunlight. At night, the opposite effect occurs, but during installation for a long period of time, a phenomenon occurs in which carbon dioxide gas runs short in water, causing aquatic plants and the like to die. Therefore, in this case, carbon dioxide gas is supplied instead of air by the aeration system.

In the above aeration system, water is sucked by a circulating pump from a suction port provided with a filter, and the water is violated by a filter provided in an upper portion of a water tank to mix air into the water and remove fine dirt. The water is returned to the water tank, which purifies the water and dissolves the air.

[0005]

However, such a conventional aeration system uses air, ozone,
In the method of dissolving carbon dioxide gas or the like in water, the bubble particles are rough and are not enough to dissolve these gases. Since ozone is hardly soluble, in a dissolving method by mass foaming in which the ozone is mixed with air and dissolved in water, if the dissolving is not sufficient, most of the ozone is released into the outside air and rather harms the human body.

When dissolving carbon dioxide gas, it is sufficient to dissolve only a very small amount of water in a limited amount of water such as a water tank. Surface. Therefore, it is necessary to generate bubbles having the minimum particle size, that is, to create bubbles that can float in water.

The present invention takes into account the various problems of the conventional aeration system described above, and incorporates bubbles into a water stream by a bubble nozzle and a mixing cylinder, and fine particles into a water stream by finer means. It is an object of the present invention to provide a gas-liquid mixing device that can be converted into a gas-liquid mixing device.

[0008]

SUMMARY OF THE INVENTION As means for solving the above problems, the present invention provides a circulation pump for generating a water flow, a bubble nozzle for mixing a required gas with the sent water flow to generate bubbles, and a bubble nozzle. And a mixing cylinder for sequentially adding the atomizing action of the air bubbles to the mixed water stream.The air bubble nozzle has a decompression portion in the nozzle flow passage and forms a gas inlet in the decompression portion, and performs mixing. The cylinder has a vertical cylinder closed at the upper end and opened at the lower end, and is a gas-liquid mixing device that is connected at the upper end guide side so that the direction of flow of water from the bubble nozzle is tangential to the cylinder. .

[0009]

According to the gas-liquid mixing apparatus of the present invention having the above-described structure, water in the water tank or the like is sucked by the circulation pump, and the water flow is sent to the bubble nozzle. In the bubble nozzle, the gas is sucked from the outside through a gas inlet into the water flow portion that has become a negative pressure in the decompression section, and is mixed into the water flow. The gas to be mixed is mixed in small fine bubbles together with the turbulence when the water flow becomes turbulent, and is sent to the mixing cylinder. In the mixing cylinder, the swirling flow has a tornado shape, and further becomes fine particles due to the pressure distribution, and the bubbles are almost completely mixed and dissolved in the liquid.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic configuration diagram of the gas-liquid mixing device. This gas-liquid mixing device is provided with a circulation pump 10 for generating a water flow.
, A bubble nozzle 20 for mixing bubbles into a water flow, and a mixing cylinder 30 for further atomizing the bubbles.

The circulating pump 10 of this embodiment is of a type in which a completely waterproof motor M for driving is integrated with a pump 11, and a filter 12 is connected to a lower end 12 of the pump 11 through a connection pipe 13. 14 are connected. 10X is a cord for the motor M, which is wired and connected outside the water tank.

A connecting pipe 15 is provided at the outlet of the pump 11, and a bubble nozzle 20 is connected to the connecting pipe 15. The outlet of the connecting pipe 15 is connected to the mixing cylinder 30 by a connecting pipe 16.

As shown in FIG. 2, the bubble nozzle 20 is provided with a suction pipe 22 at a position immediately near where the cross section of the nozzle pipe 21 having an enlarged cross-sectional view with respect to the connection pipe 15 is sharply expanded. Is provided with a flow path branching portion 23. The flow path branching portion 23 has an inner hole whose outer diameter is equal to the inner diameter of the nozzle 21 and whose inner diameter matches the inner diameter of the connection pipe 15, and a partition member 24 is provided at the center thereof. The length direction of the partition member 24 is provided so as to match the suction direction of the suction pipe 22. Note that the partition member 24 does not necessarily need to coincide with the suction direction of the suction pipe 22. 25 is an introduction pipe for sending gas such as air.

The flow path branching portion 23 is fitted into the nozzle pipe 21 as a member different from the pipe material of the connection pipe 15 and the nozzle pipe 21 or is fixed by appropriate fixing means. It may be formed integrally with the end plate 21a of the tube 21. The material of the flow path branch portion 23 may be any of metal, plastic, and hard rubber.

The mixing tube 30 is formed by connecting a hollow tube head 31 having a closed upper end and a vertical tube 32 having an open lower end below the connecting tube 16. Connected tangentially. Reference numeral 33 denotes a pipe connecting member provided at the head of the pipe for removing air bubbles, to which a thin tube 34 is connected, the upper end of which is a plug 35 provided at an appropriate position outside the water tank.
It is connected to the.

Although not shown, the bubble nozzle 2
When inhaling air as a gas to be mixed by 0,
The leading end of the introduction pipe 25 may be set as an open end outside the water tank. For example, when feeding carbon dioxide gas or ozone, it is connected to a pump for sending each gas.

The gas-liquid mixing device of the embodiment configured as described above is installed in a water tank shown in FIG. 3 and used as follows.

The motor M of the circulating pump 11 is started, and dirty water in the water tank is sucked from the filter 14 and purified water is sent from the connection pipe 15 to the bubble nozzle 20.

In the bubble nozzle 20, since the diameter of the nozzle pipe 21 is larger than that of the connection pipe 15, a cross-sectional portion of the expansion becomes a decompression section. This is because the flow velocity of the water flow from the connection pipe 15 sharply decreases, and the pressure corresponding to the dynamic pressure disappears.

Due to the rapid pressure drop in the pressure reducing section, the inner corner of the pipe in the vicinity thereof becomes in a vacuum state, and air is sucked from the suction pipe 22. At this time, the sucked air is not only sucked along the periphery of the inner diameter portion of the nozzle tube 21 as shown in FIG.
3 is provided, and the partition member 24 crosses the center of the flow path.
Is provided, the air descends along the gap at the center of the flow path, and bubbles are efficiently mixed into the water from the center of the water flow. Further, according to the experiment, the mixed particle diameter is reduced and the mixing is uniform.

The air mixed in the water stream as described above is mixed into the water stream as considerably fine air bubbles by narrowing the end of the introduction pipe 25 to an appropriate diameter.

The water flow mixed with the air bubbles is supplied to the connecting pipe 16.
To the mixing cylinder 30, where the water is sent from above to the downstream of the mixing cylinder 30 as a water stream containing finer particulate bubbles, and flows out from the lower end as a water stream containing bubbles. The water flow sent into the mixing cylinder 30 is a pipe head 31.
Is sent in the tangential direction with respect to the vertical pipe 32, and flows downward as a swirling flow in the vertical pipe 32. At this time, since the pressure distribution of the swirling flow of the bubbles contained in the water flow is low at the center and high at the periphery, the bubbles are further compressed and atomized by the pressure at the periphery. Since the pressure is lower near the center than at the periphery, bubbles are relatively easily collected.

In this state, when observing the state of the bubbles inside the experimental transparent vertical tube 32, as shown in FIG. 1, white bubbles are formed in a trumpet shape while rotating around like a tornado. The lower end is connected downward so as to draw a string, and appears to disappear near the lower end of the vertical tube 32 so that the disappearance position of the air bubble cannot be clearly recognized visually.

That is, as the water flow in the vertical pipe 32 goes downward, air bubbles are contained in the water flow, so that the water flow becomes so fine that it cannot be seen visually, and the water flows in a state of being dissolved in the water flow.

When the bubble mixing apparatus of the embodiment is continuously operated for a long time, a large number of bubbles grow considerably inside the upper end closing wall of the pipe head 31 of the mixing tube 30, and sometimes the bubbles are mixed with the mixing tube. Since the water flow in the inside may be affected, there is a plug 35 connected to the pipe connecting member 33 and the thin tube 34 as a means for coping with this, and it is preferable to release the plug 35 to release bubbles.

In the above description, the case where air is mixed as air bubbles is mainly described. However, the mixed gas is not limited to air but includes carbon dioxide gas, ozone, and the like.

Air and ozone are generally used when putting ornamental fish such as goldfish and tropical fish in a water tank, and carbon dioxide gas is preferably used when curing underwater plants such as aquatic plants and algae in the water tank.

[0028]

As described in detail above, the gas-liquid mixing device of the present invention sends the water flow sucked by the circulating pump to the bubble nozzle and mixes fine bubbles from the gas inlet provided in the decompression section of the enlarged cross section. However, the swirling flow of the mixing cylinder provided at the rear thereof further breaks down the bubbles into fine particles so that small bubbles that cannot be visually recognized are mixed into the liquid. An extremely remarkable effect is obtained in that the gas required for curing ornamental fish and aquatic plants in the aquarium can be sufficiently dissolved in the liquid by being completely dissolved by being dissolved in the partial liquid.

[Brief description of the drawings]

FIG. 1 is an overall schematic view of a gas-liquid mixing device of an embodiment.

FIG. 2 is a detailed sectional view of a bubble nozzle.

FIG. 3 is an explanatory view of an operation in a state where the gas-liquid mixing device is installed in a water tank.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Circulation pump 11 Pump 12 Lower end 13 Connection pipe 14 Filter 15 and 16 Connection pipe 20 Bubble nozzle 21 Nozzle pipe 22 Suction pipe 23 Flow passage branching part 24 Partition member 25 Induction pipe 30 Mixing cylinder 31 Pipe head 32 Vertical pipe 33 Pipe connection Member 34 Thin tube 35 Plug

Claims (1)

(57) [Claims] 1. A circulating pump for generating a water flow, a bubble nozzle for mixing a required gas into a sent water flow to generate bubbles, and a mixing for further adding a function of atomizing the bubbles to the water flow containing the bubbles. The bubble nozzle is provided with a depressurized portion in the flow path inside the nozzle, and a gas inlet is formed in the depressurized portion.The mixing cylinder has a vertical cylinder with the upper end closed and the lower end opened. And a gas-liquid mixing device connected on the upper end guide side such that the flow direction of the water flow from the bubble nozzle is tangential to the cylinder.