JPH05261387A - Feeder of oxygen dissolved water - Google Patents

Abstract

PURPOSE:To prevent loss of motive power in the part of a liquid-gas mixer K in which oxygen and air are dissolved in seawater and to enhance dissolving efficiency of oxygen and air in a transport device of live fish. CONSTITUTION:A circuit constituted of a branched pipe 3 having small diameter and a combined pipe 4 is provided in addition to a water channel main pipe 13 for supplying oxygen. A liquid-gas mixer K is arranged in the circuit. Oxygen and air are sucked by ejector effect of the liquid-gas mixer K. Mixed water after mixing gas and liquid is joined to the water channel main pipe B for supplying oxygen.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for supplying dissolved oxygen water in which a large amount of oxygen or air is dissolved in a live fish transportation device or the like.

[0002]

2. Description of the Related Art Conventionally, in a dissolved oxygen water supply apparatus, a gas disperser 13 is opened inside a large diameter oxygen supply water main pipe B as shown in FIG. A method of blowing oxygen gas from a gas generator directly into the oxygen supply water channel main pipe B via 17 to dissolve the oxygen gas inside the oxygen supply water channel main pipe B, or a method disclosed in Shokai 63-716.
As shown in Japanese Patent Publication No. 90 and FIG. 5, a technique has been publicly known in which a water jet mixer is used to exert an ejector effect by means of a narrowing portion 6 and an opening / spreading portion 9.

[0003]

However, in the case of the former prior art, inside the large-diameter oxygen supply water channel main pipe B, in order to efficiently dissolve the gas, the bubbles of the blown gas are made fine. Therefore, the gas disperser 13 has an opening 2
Since it is necessary to use one having a particle size of 0 μm or less, the gas disperser 13 is clogged due to continuous use, which causes a problem that the amount of inhaled oxygen is reduced. Further, when the internal pressure of the large-diameter oxygen supply water main pipe B is higher than that of the gas generator, the gas supply pressure from the gas generator 2 needs to be equal to or higher than the internal pressure of the oxygen supply water main pipe B. The problem was that a pressure pump was needed. In the case of the latter prior art, a water jet mixer is provided inside the oxygen supply water channel main pipe B to suck gas from the gas supply pipe 17 by the ejector effect and mix and dissolve it in the turbulent air flow section and thereafter. In this case, since the water jet mixer is provided in the oxygen supply water channel main B, the head loss due to the water jet mixer becomes very large, and the cost of the water supply power and equipment of the oxygen supply water channel main B is high. Had become. The present invention provides a small-diameter pipe, a water-jet mixer is provided inside the small-diameter pipe, and although there is a loss in power supply, no additional equipment is required.
It can be constructed at low cost.

[0004]

The problems to be solved by the present invention are as described above. Next, the means for solving the problems will be described.
That is, a small-diameter branch pipe having a smaller diameter than the oxygen supply water channel main pipe is provided, a gas-liquid mixer is interposed in the small-diameter branch pipe, and oxygen or air is mixed and mixed toward the gas-liquid mixer, and after the gas-liquid mixing. The mixed liquid of (1) is joined to the main pipe of the oxygen supply water channel through the joining pipe.

[0005]

Next, the operation of the present invention will be described. That is, the gas-liquid mixer K is arranged in the circuit of the small diameter branch pipe 3 and the merging pipe 4. Since the gas-liquid mixer K is constructed inside the small-diameter small-diameter branch pipe 3 or the merging pipe 4, the water-supply power loss certainly occurs inside the small-diameter branch pipe 3; Since the loss of the water supply power does not occur inside the supply water channel main pipe B, the loss of the water supply power does not become so large. Further, since the water jet mixer exerts an ejector effect, it sucks the oxygen gas generated in the gas generator 2, so that it is not necessary to provide a pressureable oxygen pump.

[0006]

EXAMPLES Next, examples of the present invention will be described. FIG. 1 is a circuit diagram of a live fish transporting apparatus equipped with the dissolved oxygen water supply device of the present invention, FIG. 2 is a circuit diagram of the dissolved oxygen water supply device of the present invention, and FIG.
Is a gas-liquid mixer K that constitutes the dissolved oxygen water supply device of the present invention.
And a cross-sectional view of a portion of the oxygen supply water main B, FIG. 4 is a cross-sectional view of a conventional technique in which the gas disperser 13 is arranged inside the oxygen supply water main B, and FIG. FIG. 4 is a cross-sectional view of a conventional technique in which a water jet mixer is arranged in FIG. In FIG. 1, the circuit of the live fish transport apparatus will be described. Live fish tank 7a ・ 7 by two blowers 19 ・ 19
Oxygen is absorbed in seawater in b. In addition, the pure oxygen from the emergency oxygen cylinders 16 and 16 can be used for the live fish tank 7 in an emergency.
Air is supplied below a. 7b so that live fish will not die in an emergency such as engine stop. The water overflowing from the live fish water tanks 7a and 7b is supplied from the filtration filters 10 and 10 to the aeration tank 8 and pressure-fed from the bottom of the aeration tank 8 through the water circulation pumps 18a and 18b. The circuit supplied by the water circulation pump 18a is the oxygen supply water channel main pipe B, and oxygen or air from the gas generator 2 is mixed with the seawater by the gas-liquid mixer K to obtain the live fish tank 7.
It returns to a.7b. Further, the circuit for pressure feeding by the water circulation pump 18b is the cooling water passage A, and the physical filter 1
Pressure is applied to 5 to allow seawater to pass therethrough, forcibly separating dust and excrement. After passing through the physical filter 15, the seawater is cooled by the cooler 14, and the live fish tank 7a
・ Returns to 7b.

In this structure, after passing through the physical filter 15, the seawater before being supplied to the cooler 14 is branched,
It is supplied to the biological filter medium 5 while being adjusted by the water absorption control valve V. Air is supplied to the inside of the aeration tank 8 by another blower 19 so that air is aerated as the bubbles rise. In addition, bacteria that perform a nitrifying action are cultured inside the biological filter medium 5 to decompose ammonia excreted by live fish. The amount of water flow that optimizes the nitrification action is adjusted by the water absorption control valve V and supplied to the biological filter medium 5. Further, a scum foam pipe 49 is projected above the live fish tanks 7a and 7b, and the foam that comes out of the scum foam pipe 49 is stored in the scum tank 44.

In the above construction, the present invention relates to the construction of the oxygen supply water channel main pipe B, the gas-liquid mixer K, the gas generator 2, the small diameter branch pipe 3 and the confluence pipe 4. Conventionally, as shown in FIG. 4, the gas disperser 13 is disposed inside the oxygen supply water channel main pipe B, and the oxygen gas pressure-fed through the gas supply pipe 17 by the pressure pump is ejected from the gas disperser 13 to form fine bubbles. Therefore, it was dissolved in the seawater.
Further, as shown in FIG. 5, since the water jet mixer constituted by the throttle portion 6 and the open / closed portion 9 is formed inside the oxygen supply water channel main pipe B, the internal loss of the oxygen supply water channel main pipe B becomes large, The water circulation pump 18a for sending seawater under pressure into the oxygen supply water channel main pipe B was large in size, and the power loss was also large.

In the present invention, as shown in FIGS. 2 and 3, a small diameter branch pipe 3 is provided separately from the oxygen supply water channel main pipe B, and the small diameter branch pipe 3 is connected to a confluence pipe 4 in which a gas-liquid mixer K is arranged. And the merging pipe 4
Alternatively, the gas-liquid mixer K provided in the small-diameter branch pipe 3 is configured so that a mixture of oxygen or air and water is joined to the oxygen supply water channel main pipe B by the joining pipe 4. As shown in FIG. 3, the gas-liquid mixer K constitutes a water jet mixer by arranging the narrowed portion 6 and the open / spreading portion 9 inside the small diameter branch pipe 3 and the confluence pipe 4 each having a small diameter. Since it exerts the ejector effect, it is not necessary to provide a pressure pump. Due to the ejector effect, a negative pressure is generated from the gas generator 2 via the gas supply pipe 11,
Oxygen gas and air are inhaled.

[0010]

Since the present invention is configured as described above, it has the following effects. That is, compared with the case where the ejector configured by the water jet mixer is provided in the oxygen supply water channel main pipe B, the power loss is small. Therefore, the water circulation pump 18a of the oxygen supply water channel main pipe B should be a small pump. Was done. Moreover, since the small-diameter branch pipe 3 has a small diameter, the flow velocity in the narrowed portion 6 becomes large, and the bubbles can be made small, thereby improving the dissolution efficiency of dissolving gas such as oxygen and air in water. I was able to do it. Further, since the small-diameter branch pipe 3 has a small diameter, the ejector constituted by the water jet mixer can be downsized.

[Brief description of drawings]

FIG. 1 is a circuit diagram of a live fish transporting apparatus equipped with the dissolved oxygen water supply apparatus of the present invention.

FIG. 2 is a circuit diagram of a dissolved oxygen water supply device of the present invention.

FIG. 3 is a cross-sectional view of a portion of a gas-liquid mixer K and an oxygen supply water channel main pipe B constituting a dissolved oxygen water supply device of the present invention.

FIG. 4 is a cross-sectional view of a conventional technique in which a gas disperser 13 is arranged inside an oxygen supply water channel main pipe B.

FIG. 5 is a cross-sectional view of a conventional technique in which a water jet mixer is similarly arranged inside the oxygen supply water channel main pipe B.

[Explanation of symbols]

 B Oxygen supply water channel main K Gas-liquid mixer 2 Gas generator 3 Small diameter branch pipe 4 Confluence pipe 6 Constriction part 7 Live fish tank 8 Aeration tank 9 Opening part 11,17 Gas supply pipe

Claims (1)

[Claims] 1. A small-diameter branch pipe having a diameter smaller than that of the oxygen supply water channel main pipe is provided, a gas-liquid mixer is interposed in the small-diameter branch pipe, and oxygen or air is combined and mixed toward the gas-liquid mixer, A dissolved oxygen water supply device, characterized in that the mixed liquid after liquid mixing is joined to the main pipe of the oxygen supply water channel through a junction pipe.