JP5221978B2 - Biological breeding water production equipment - Google Patents

Description

  The present invention relates to an apparatus for producing water for biological growth comprising oxygen-dissolved water for growing plants and seafood.

  In order to increase the activity of plants and seafood and accelerate the growth, oxygen is supplied to water for growing plants and seafood.

  For example, in Patent Document 1 and Patent Document 2, when hydroponically cultivating a plant, microbubbles (microbubbles) are discharged into water from a microbubble generating nozzle to increase dissolved oxygen in the water, thereby growing the plant. An apparatus has been proposed in which the necessary oxygen is sufficiently supplied.

Further, in Patent Document 3, when seafood is grown in an aquarium, by releasing the microbubbles from the microbubble generating means to the water in the aquarium, the dissolved oxygen in the water is increased and oxygen necessary for the growth of the seafood is increased. Devices have been proposed that provide a sufficient supply.
JP 2002-142582 A JP 2006-42785 A JP 2007-105010 A

  All of the above are intended to increase dissolved oxygen in water by supplying microbubbles into water for cultivating plants and water for growing seafood. However, simply supplying microbubbles into water does not improve the dissolved oxygen concentration so much, and the applicant has actually measured that the dissolved oxygen concentration (DO) is at most 14 mg / L. Since the microbubbles escape from the water surface in a short time, the dissolved oxygen concentration drops to about 8-9 mg / L in about 5 minutes, and it is highly expected to increase the activity of plants and seafood and accelerate the growth. It can't be done.

  In addition, since microbubbles are supplied into the water from a predetermined location, the amount of dissolved oxygen differs at locations near and far from the supply location, and since microbubbles float in water, the dissolved oxygen concentration at the bottom is low. For example, the dispersion of dissolved oxygen concentration in water increases, and there is a problem that it is difficult to grow plants and seafood uniformly.

  Furthermore, when the microbubbles are released into the aquarium for growing seafood as in Patent Document 3, the inside of the aquarium becomes cloudy white due to the microbubbles, and the seafood in the aquarium cannot be seen. There is also a problem that it becomes difficult to observe.

  The present invention has been made in view of the above points, and can dissolve oxygen uniformly and at a high oxygen concentration in water, and can dissolve oxygen without making the water white and cloudy. It is an object to provide an apparatus for producing water for biological growth that is highly effective in accelerating the growth of fish and seafood.

The apparatus for producing biological growth water according to the present invention is an apparatus for producing oxygen-dissolved water as biological growth water for growing plants and fish and shellfish, and injects oxygen into the pressure unit 1 that pumps water. Oxygen was dissolved in the oxygen injection part 2, the pressure dissolution part 3 that dissolves oxygen in water by pressurizing the water injected with oxygen by the pressure part 1, and the pressure dissolution part 3. A pressure reducing unit 4 that sequentially reduces the pressure of the oxygen-dissolved water from the inflow side to the outflow side of the oxygen-dissolved water to the atmospheric pressure. 6 includes a plurality of pressure regulating valves 7 that gradually reduce the pressure of the oxygen-dissolved water to atmospheric pressure, and each of the pressurizing unit 1, the oxygen injection unit 2, and the pressurizing / dissolving unit 3 is continuously provided. by operating in an oxygen-dissolved water was continuously fed to a vacuum unit 4, the decompression unit 4 while flowing oxygen dissolved water Stepwise pressure was gradually reduced I and is characterized by comprising as to discharge without generating oxygen-dissolved water of the bubble from the outlet side of the pressure reducing unit 4 continuously.

According to this invention, since oxygen is dissolved in water by pressurization, oxygen can be dissolved in water uniformly and at a high concentration. In addition, since the pressure of the oxygen-dissolved water in which oxygen is dissolved at a high concentration is gradually reduced from the inflow side to the outflow side by the decompression unit 4 to the atmospheric pressure, the generation of bubbles in the oxygen-dissolved water is prevented. Thus, oxygen-dissolved water in which oxygen is dissolved uniformly and at a high concentration can be supplied as it is as biological growth water without becoming cloudy white. Further, according to the present invention, the pressure of the oxygen-dissolved water can be lowered by adjusting the pressure by the pressure adjusting valve 7, and the oxygen dissolving is performed by adjusting the pressure by the pressure adjusting valve 7 in accordance with the pressure in the pressure dissolving unit 3. It is possible to stably prevent generation of bubbles in water.

Furthermore, the further invention is characterized by comprising a surplus oxygen discharge section 5 that discharges surplus oxygen that does not dissolve in water in the pressure dissolution section 3.

  According to the present invention, excess oxygen that does not dissolve in water is discharged from the pressure dissolution unit 3, thereby stabilizing the ratio of oxygen and water in the pressure dissolution unit 3 due to excess oxygen remaining, and pressure fluctuation. It is possible to prevent this, and the oxygen dissolution efficiency can be kept high.

Further, the invention is characterized in that the decompression section 4 is formed by one flow path.

  According to the present invention, the apparatus configuration does not become complicated as in the case where the pressure reducing unit 4 is formed by providing a plurality of flow paths.

In a further invention, the sum of the pressure loss of the flow path 6 for sending the oxygen-dissolved water from the pressure dissolving section 3 and the pressure loss of the extension flow path 8 added to the flow path 6 is pumped by the pressurizing section 1. An extension channel 8 is added to the channel 6 so that the pressure required to pressurize the water and oxygen in the pressurizing / dissolving unit 3 by the pressure of water and oxygen is provided. .

  According to the present invention, by adding the extension flow path 8 to the flow path 6, it is possible to secure the pressure in the pressurizing and dissolving section 3 with the pushing pressure from the pressurizing section 1 without using a throttle valve. In this pressure, oxygen can be dissolved in water.

Furthermore, the invention further measures the oxygen dissolution concentration of the oxygen-dissolved water, and at least one of the pressure of the water pumped by the pressurizing unit 1 and the flow rate of the water pumped by the pressurizing unit 1 based on the measurement result. It is characterized by comprising an oxygen concentration detection controller 11 for controlling.

  According to the present invention, based on the oxygen dissolved concentration measured by the oxygen concentration detection control unit 11, the oxygen dissolved water is adjusted while adjusting the required dissolved oxygen concentration by feedback control of the water pressure and flow rate. It can be supplied as water for biological growth.

  According to the present invention, since oxygen is dissolved in water by pressurization by the pressurizing unit 1, oxygen can be dissolved in water uniformly and at a high concentration, and oxygen can be dissolved at a high concentration. Since the pressure of the dissolved oxygen-dissolved water is gradually reduced from the inflow side to the outflow side by the decompression unit 4 to the atmospheric pressure, bubbles are prevented from being generated in the oxygen-dissolved water, and the air bubbles are turbid white. Therefore, oxygen-dissolved water in which oxygen is uniformly dissolved at a high concentration can be supplied as it is as water for biological growth.

  Hereinafter, the best mode for carrying out the present invention will be described.

  FIG. 1 shows an example of an embodiment of the present invention, in which flow paths 15 and 6 formed by piping are respectively connected to the outflow side and the inflow side of the pressure dissolution unit 3. One end of the flow path 15 on the inflow side is connected to the pressure dissolution unit 3 and the other end is connected to the growth tank 17, and the pressure unit 1 is provided in the middle of the flow path 15. The pressurizing unit 1 is formed by, for example, a pump 18 that sucks water 16 from the growth tank 17 and pumps it to the pressurizing and dissolving unit 3. The growth tank 17 is formed as a water tank for growing the seafood 35 or a cultivation tank for hydroponically cultivating the plant 36, and stores water 16 made of fresh water or seawater.

  The oxygen injection section 2 is connected to the flow path 15 on the inflow side. The oxygen injection part 2 is for supplying oxygen to the flow path 15 and injecting it, and a cylinder filled with oxygen is connected to the flow path 15 to form the oxygen injection part 2. When supplying and injecting oxygen in the air, the other end of the tube whose one end is opened to the atmosphere is connected to the flow path 15 to form the oxygen injecting portion 2 so that air is injected. Also good. The connecting position of the oxygen injection part 2 to the flow path 15 may be a position upstream of the pressurizing / dissolving part 3 and is connected to the flow path 15 upstream of the pressurizing part 1 as shown in FIG. Alternatively, it may be either connected to the flow path 15 on the downstream side of the pressurizing unit 1.

  On the other hand, one end of the flow path 6 on the outflow side is connected to the pressure dissolution unit 3, and the other end is connected to the growth tank 17. The pressure dissolving unit 3 is provided with a surplus oxygen discharge unit 5. The surplus oxygen discharge unit 5 connects, for example, a tube whose one end is opened to the atmosphere to the pressurization and dissolution unit 3 via a degassing valve or the like that opens when the pressure in the pressurization and dissolution unit 3 exceeds a predetermined pressure. It is formed by doing. Further, the flow path 6 is provided with a decompression unit 4, and further, an oxygen concentration detection unit 37 formed by an oximeter is provided downstream of the water flow from the decompression unit 4. The oxygen concentration detector 37 is electrically connected to the controller 38, and the controller 38 is electrically connected to the pressurizer 1, and the controller 38 controls the operation of the pressurizer 1. I can do it. The oxygen concentration detection control unit 11 is formed by the oxygen concentration detection unit 37 and the control unit 38.

  In the water production apparatus for biological growth formed as described above, when the pressurization unit 1 formed by the pump 18 is operated, water is sucked up from the growth tank 17 and is passed through the flow path 15 to the pressurization dissolution unit 3. Water is pumped and supplied. As described above, when water flows through the flow path 15, oxygen is sucked into the flow path 15 from the oxygen injection section 2 and oxygen is injected into the water. Then, the water into which oxygen is injected in this manner is sent by being fed to the pressure dissolving unit 3 by the pressurizing unit 1, and pressure is applied to the water and oxygen in the pressure dissolving unit 3 by the pushing force by this pressure feeding. Oxygen can be dissolved in water more efficiently than the saturated amount by being pressurized and water and oxygen are pressurized in the pressurizing and dissolving part 3, and oxygen in which oxygen is uniformly dissolved at a high concentration in water Dissolved water can be obtained.

  In this way, since the water and oxygen are pressurized and dissolved in the pressure dissolving part 3 forcibly and efficiently, oxygen-dissolved water in which oxygen is dissolved at a high concentration can be generated in a short time. The oxygen-dissolved water generated in 3 is sent out through the flow path 6, and oxygen can be dissolved in water in the pressure-dissolving unit 3. Therefore, it is not necessary to form the pressure dissolving part 3 with a large volume such as a tank, and the apparatus scale can be reduced and the cost of the apparatus can be reduced.

  Here, if the total amount of oxygen injected from the oxygen injection unit 2 is not dissolved in water, surplus oxygen that does not dissolve in water is generated in the pressure dissolution unit 3, but the excess oxygen discharge unit 5 is provided in the pressure dissolution unit 3. Provided, by discharging excess oxygen that cannot be dissolved more than the dissolved oxygen saturation amount from the pressure dissolution unit 3, the ratio of oxygen and water in the pressure dissolution unit 3 due to the residual oxygen remaining is stabilized and the pressure fluctuation Can be prevented, and the dissolution efficiency of oxygen can be kept high.

  And the oxygen-dissolved water produced | generated in the pressurization melt | dissolution part 3 as mentioned above is sent out through the flow path 6, However, Since the oxygen melt | dissolution water is in the state pressurized by the high pressure in the pressurization melt | dissolution part 3, If supplied to the growth tank 17 under atmospheric pressure as it is, bubbles may be generated in the oxygen-dissolved water due to a rapid pressure drop, the amount of dissolved oxygen may decrease, and cavitation may occur. For this reason, in the present invention, when the pressure reducing part 4 is provided in the flow path 6 and oxygen-dissolved water pressurized in the pressure dissolving part 3 is sent out through the flow path 6, It is made to discharge after decompressing without generating.

  Here, when the oxygen-dissolved water having the same concentration as that generated in the pressure-dissolving unit 3 is depressurized from the same pressure as that pressurized in the pressure-dissolving unit 3 to the atmospheric pressure, bubbles are generated. The degree of decompression that does not occur is obtained in advance by calculation or measurement, and the pressure of the oxygen-dissolved water is stepwise from the side where the oxygen-dissolved water flows into the outflow side at the decompression section 4 at the pre-determined degree of decompression. Or continuously or gradually so that the pressure can be reduced to atmospheric pressure. Accordingly, the oxygen-dissolved water pressurized in the pressure-dissolving unit 3 is gradually depressurized to the atmospheric pressure at a depressurization degree in which bubbles are not generated in the decompression unit 4, and then discharged from the tip of the flow path 6. Oxygen-dissolved water can be discharged without generating bubbles in the dissolved water, and the oxygen-dissolved water in which oxygen is dissolved to a saturation amount or more in the pressure-dissolving unit 3 remains in a stable high concentration state. It can be sent out and used.

  FIG. 2 shows an example of a specific embodiment of the decompression unit 4, and a plurality of pressure regulating valves 7 ( 7a, 7b, 7c) is provided to form the decompression section 4. Thus, by forming the decompression unit 4 with the plurality of pressure regulating valves 7, the pressure of the oxygen-dissolved water can be gradually lowered step by step with a degree of decompression that does not generate bubbles.

  Each pressure regulating valve 7a, 7b, 7c is set to depressurize at a degree of decompression that does not generate bubbles in the oxygen-dissolved water, and this degree of decompression is set to a numerical value obtained by calculation or measurement in advance. Is. For example, when the pressurized pressure of oxygen-dissolved water sent from the pressure-dissolving unit 3 to the flow path 6 is 0.5 MPa, it is found by measurement that the amount of reduced pressure at which no bubbles are generated is 0.12 MPa. Then, the pressure of the oxygen-dissolved water is reduced by 0.12 MPa by the pressure adjusting valve 7a and dropped to 0.38 MPa. Further, when the pressure of oxygen-dissolved water is 0.38 MPa, if it is determined by measurement that the amount of reduced pressure at which bubbles are not generated is 0.16 MPa, the pressure of oxygen-dissolved water is determined by the next pressure regulating valve 7b. Is reduced to 0.12 MPa and reduced to 0.22 MPa. Furthermore, when the pressure of oxygen-dissolved water is 0.22 MPa, if it is found by measurement that the amount of reduced pressure at which bubbles do not occur is 0.22 MPa or more, the oxygen-dissolved water is detected by the next pressure regulating valve 7c. The pressure can be reduced to 0.22 MPa, the applied pressure can be reduced to 0 MPa, and the pressure can be reduced to atmospheric pressure. Note that the amount of pressure reduction by the pressure regulating valve 7 varies depending on the water temperature, the dissolved concentration of oxygen, the pressure in the pressurized dissolving section 3, the diameter of the flow path 6, and the like. Thus, it is set as appropriate.

  FIG. 3 shows another example of a specific embodiment of the decompression unit 4, and a plurality of tubes 20a and 20b having different channel cross-sectional areas in the channel 6 connected to the pressure dissolution unit 3 are shown. 20c, and the decompression section 4 is formed by a plurality of pipe bodies 20a, 20b, 20c having different channel cross-sectional areas.

  In the embodiment of FIG. 3A, a plurality of pipes 20a, 20b, and 20c having different flow path cross-sectional areas, that is, different inner diameters, are integrally connected, and from the upstream side to the downstream side of the flow of oxygen-dissolved water. The diameters of the tubular bodies 20a, 20b, and 20c are gradually reduced toward the side. In the embodiment of FIG. 3 (b), a plurality of tubes 20a, 20b, 20c having different inner diameters are connected and connected via a reducer 21, and from the upstream side to the downstream side of the flow of oxygen-dissolved water. The diameters of the pipe bodies 20a, 20b, and 20c are gradually reduced. Further, in the embodiment of FIG. 3C, the pipes 20a, 20b, and 20c whose diameter continuously decreases from the upstream side to the downstream side of the flow of the oxygen-dissolved water are integrally connected.

In FIG. 3, the inner diameters of the pipe bodies 20a, 20b, and 20c are φd ₁ > φd ₂ > φd ₃ , so the flow rate of the oxygen-dissolved water in each of the pipe bodies 20a, 20b, and 20c is V _1. <V ₂ <V _{3 is} satisfied, and the pressure of the oxygen-dissolved water in each of the tubular bodies 20a, 20b, and 20c is P ₁ > P ₂ > P ₃ . Thus, a reduced pressure degree of bubble pressure P ₁ of oxygen dissolved water fed from the pressure dissolution unit 3 does not occur, FIGS. 3 (a) those in is stepwise reduced pressure (b), and FIG. 3 (c) intended are those which can be lowered continuously reduced pressure, gradually to atmospheric pressure P _3.

FIG. 4 shows another example of the specific embodiment of the decompression unit 4. When the oxygen-dissolved water is discharged through the channel 6 connected to the pressure dissolution unit 3, The pressure loss when oxygen-dissolved water flows causes the pressure of oxygen-dissolved water to gradually and continuously decrease at a decompression rate that does not generate bubbles in the oxygen-dissolved water, so that the pressure of oxygen-dissolved water is reduced to atmospheric pressure. It is. In the embodiment of FIG. 4 (a) Thus, the oxygen dissolution water pressure P ₁ in the press-welding within the solution 3, the P ₂ ~P _n-1 when passing through the flow channel 6, the oxygen The pressure is gradually and continuously reduced at a decompression rate at which bubbles do not occur in the dissolved water (P ₁ > P ₂ > P _n-1 ), and the pressure P _n of the oxygen-dissolved water reaches atmospheric pressure at the end of the flow path 6. The flow path cross-sectional area and the pipe length L of the flow path 6 are set so as to decrease, and the decompression unit 4 is configured by the flow path 6 having such a flow path cross-sectional area and the pipe length L. Is formed.

The pipe length L can be set from the following equation. That is,
Fluid relational expression P = λ · (L / d) · (v ² / 2g)
[P is the pressure in the pressure dissolution section 3, λ is the coefficient of friction of the tube, d is the inner diameter, v is the flow velocity, and g is the acceleration]
From this, L = (P · d · 2g) / (λ · v ² ) can be derived, and the pipe length L of the flow path 6 can be obtained by calculation from this equation. As described above, the decompression section 4 can be formed only by forming the pipe length L of the flow path 6 to a predetermined length, and the structure of the apparatus can be made simpler. It is. The decompression section 4 formed by the flow path 6 having a long pipe length L can be formed by a long hose 4a as shown in FIG. 4B, for example.

  As described above, in the present invention, water and oxygen are pumped to the pressurizing / dissolving unit 3 by the pressurizing unit 1, and water and oxygen are pressurized in the pressurizing / dissolving unit 3 by the pressing pressure at this time so as to dissolve oxygen. However, it is necessary to generate a necessary pressure in the pressurizing / dissolving portion 3 by receiving the pushing pressure. In order to secure the pressure that receives the indentation pressure from the pressurizing unit 1 as described above, it is conceivable to provide a throttle unit such as a throttle valve in the flow path 6 on the outflow side of the pressurizing and dissolving unit 3. When the throttle portion is provided in the flow path 6, when the oxygen-dissolved water generated in the pressure dissolution section 3 is sent to the flow path 6 and discharged, a large pressure difference occurs before and after the throttle section, and the oxygen-dissolved water rapidly There is a risk that bubbles will be generated in the oxygen-dissolved water.

  Therefore, in the embodiment of FIG. 5, the pressure loss of the flow path 6 is used to secure the pressure that receives the indentation pressure without the need to provide the throttle portion in the flow path 6. At this time, with the length of the flow path 6 of each of the above embodiments, it is difficult to secure the pressure that receives the indentation pressure due to the pressure loss of the flow path 6. An extension channel 8 is added to the part. That is, the total pressure loss including the decompression unit 4 of the flow path 6 is calculated, and the pressure required to pressurize water and oxygen in the pressurization dissolution unit 3 by the indentation pressure from the pressurization unit 1, The difference from the pressure loss of the flow path 6 is calculated, and the length of the pipe line in which the pressure loss of this difference occurs is calculated from the above formula, and the extended flow path 8 of this pipe length is changed to the flow path 6. They are added. In this way, the sum of the pressure loss of the flow path 6 and the pressure loss of the extension flow path 8 pressurizes water and oxygen in the pressurizing and dissolving section 3 by the pushing pressure of oxygen and water pumped by the pressurizing section 1. By adding the extension flow path 8 to the flow path 6 so that the pressure required for the pressure is reached, it is not necessary to use a throttling portion such as a throttling valve. Thus, it is possible to dissolve oxygen in water.

  FIG. 6 shows a specific example of the apparatus. Water supplied from the growth tank 17 is introduced into the flow path 15 from the introduction port 30. An oxygen injection part 2 into which oxygen is introduced is connected to the flow path 15, and the water into which oxygen has been injected is a pressure dissolving part formed in a small capacity tank by a pressure part 1 formed by a pump. 3 is pumped. Thus, oxygen-injected water in which oxygen is dissolved in water is generated in the pressure-dissolving unit 3 by pumping the water into which oxygen has been injected to the pressure-dissolving unit 3. The oxygen-dissolved water is sent out from the pressure dissolving unit 3 to the flow path 6, sent out from the discharge port 31 at the tip of the flow path 6, and returned to the growth tank 17. The flow path 6 is provided with a decompression section 4, and the oxygen-dissolved water sent out from the pressure-dissolution section 3 is decompressed to atmospheric pressure and then discharged from the discharge port 31, so that oxygen-dissolved water is generated in the state where no bubbles are generated. Can be sent out. In the embodiment of FIG. 6, the decompression unit 4 is formed by connecting the tubular bodies 20a, 20b, and 20c having different inner diameters as shown in FIG.

  In this apparatus, by continuously operating the pressurizing unit 1 formed by a pump, the oxygen injecting unit 2 and the pressurizing / dissolving unit 3 are continuously operated to continuously supply oxygen-dissolved water to the decompressing unit 4. The oxygen-dissolved water without generation of bubbles can be continuously discharged from the discharge port 31 on the outflow side of the decompression unit 4. The decompression unit 4 is provided as a part of a flow path 6 for sending oxygen-dissolved water from the pressure-dissolving unit 3, and the decompression unit 4 sequentially increases the pressure of the oxygen-dissolved water from the inflow side to the outflow side. Since the pressure is reduced to atmospheric pressure, the pressure reducing portion 4 can be formed as a relatively large flow path having an inner diameter of about 2 to 50 mm, for example, and the inside of the pressure reducing portion 4 is clogged even if foreign matter is mixed in. There is nothing. Furthermore, by providing the decompression unit 4 having such a configuration, not only the laminar flow state in which the Reynolds number of the oxygen-dissolved water flowing through the decompression unit 4 is smaller than the critical Reynolds number (Re = 2320), but also the critical Reynolds number It is possible to cope with a turbulent flow state having a larger Reynolds number. Furthermore, by forming the decompression section 4 as a flow path having a large inner diameter in this way, it is possible to increase the supply amount of oxygen-dissolved water, and it is possible to form the decompression section 4 with only one flow path. Therefore, it is possible to form a simple apparatus configuration.

  Further, when the oxygen-dissolved water whose pressure is reduced by the decompression unit 4 as described above passes through the flow path 6, the oxygen concentration detection unit 37 measures the dissolved oxygen concentration of the oxygen-dissolved water. The dissolved oxygen concentration data measured by the oxygen concentration detection unit 37 is input to the control unit 38. The control unit 38 is formed with a CPU, a memory, and the like. Based on the dissolved oxygen concentration value input from the oxygen concentration detection unit 37, the pressure of the water fed by the pressurization unit 1 and the pressurization unit At least one of the flow rates of the water pumped by 1 is controlled. That is, when the dissolved oxygen concentration measured by the oxygen concentration detection unit 37 is smaller than the value registered in the memory of the control unit 38, the control unit 38 controls the operation of the pressurizing unit 1 to control the pressure of the pumped water. The oxygen concentration dissolved in the pressure dissolving unit 3 is increased by increasing the flow rate of water or the flow rate of the pumped water, and the dissolved oxygen concentration measured by the oxygen concentration detecting unit 37 is controlled by the control unit 38. When the value is larger than the value registered in the memory, the control unit 38 controls the operation of the pressurizing unit 1 to lower the pressure of the pumped water and increase the flow rate of the pumped water. The oxygen concentration dissolved in the pressure dissolving unit 3 is lowered, and the dissolved oxygen amount of the oxygen-dissolved water is adjusted to the value of the oxygen concentration registered in the memory of the control unit 38. Accordingly, although the amount of dissolved oxygen required in the oxygen-dissolved water differs depending on the application, the required dissolved oxygen concentration can be obtained by registering the necessary dissolved oxygen amount data in the memory of the control unit 38. The oxygen-dissolved water can be generated while adjusting.

  FIG. 7 shows that the oxygen-dissolved water generated in the pressure-dissolving unit 3 at a predetermined pressure is controlled to a normal pressure without generating bubbles in the pressure-reducing unit 4 under a constant flow rate. It is a graph which shows the relationship between the oxygen concentration of oxygen-dissolved water and water temperature. If the flow rate is constant, the oxygen concentration has a correlation depending on the temperature of the water, and is reproducible. Therefore, in order to obtain oxygen-dissolved water having the required oxygen concentration, if the water temperature is measured and the pressurization by the pressurizing unit 1 is controlled to the required pressure according to the water temperature, the oxygen-dissolved water with a predetermined concentration is highly reproducible. Water can be obtained. For example, when the pressure characteristic of the pump 18 of the pressurizing unit 1 is set to 0.5 MPa for water at 20 ° C. using an inverter or the like, and oxygen is dissolved under this 0.5 MPa pressure, 45 mg / L An oxygen-dissolved water having an oxygen-dissolved concentration of 27 mg / L can be obtained by changing the pressure to 0.3 MPa.

  The oxygen-dissolved water decompressed to atmospheric pressure without generating bubbles in the pressurizing unit 1 as described above is returned to the breeding tank 1 from the discharge port 31 of the flow path 6 as water for biological growth. Yes, the dissolved oxygen concentration of the water 16 in the growth tank 17 can be maintained high, and the activity of the plant 36 and the seafood 35 can be increased to accelerate the growth. In particular, when raising seafood using the growth tank 17 as a water tank, oxygen deficiency is likely to occur when the water temperature rises in summer, etc., but by supplying oxygen-dissolved water in which oxygen is dissolved at a high concentration, oxygen deficiency is eliminated. It is possible to prevent the occurrence of illness and improve the breeding density.

  Here, the oxygen-dissolved water obtained in the present invention is not such that microbubbles are blown in, but oxygen is dissolved in water by the pressurizing / dissolving unit 3 by pressurization by the pressurizing unit 1 as described above. Therefore, oxygen can be dissolved uniformly and at a high concentration, and the pressure of the oxygen-dissolved water in the pressurized state is reduced to atmospheric pressure so that bubbles are not generated in the pressure-reducing part 4. Therefore, oxygen-dissolved water in which oxygen is uniformly dissolved at a high concentration can be supplied as water for biological growth, and a high dissolved oxygen concentration can be maintained for a long time in the water for biological growth. Is. For this reason, it is possible to uniformly accelerate the growth of the plant 36 and the seafood 35 in the growth tank 17. Further, since the pressure is reduced by the pressure reducing unit 4 so that bubbles are not generated in the oxygen-dissolved water, the oxygen-dissolved water does not become cloudy white due to the bubbles, and the growth state of the seafood 35 is observed. It becomes easy.

  FIG. 8A shows the relationship between the dissolved oxygen concentration (DO) and the elapsed time when the oxygen-dissolved water produced as described above is stored at 4 ° C. under atmospheric pressure. It can be seen that a high dissolved oxygen concentration of about 30 mg / L is maintained over time. FIG. 8B shows the temperature of water when oxygen is dissolved in fresh water in a pressurized state of 0.5 MPa in the pressure-dissolving unit 3, and the oxygen-dissolved water is depressurized to atmospheric pressure in the decompression unit 4. It shows the relationship of oxygen concentration, and it can be seen that even when the temperature of water is high, it shows a high oxygen concentration of about 30 mg / L.

  In the embodiment of FIG. 1 described above, water in the growth tank 17 is sucked to generate oxygen-dissolved water in the pressure-dissolving unit 3, and this oxygen-dissolved water decompressed to atmospheric pressure in the decompression unit 4 grows as breeding water. Although it is made to circulate by returning to the tank 17, in the embodiment of FIG. 9, the water 16 is supplied from the water pipe 19 to the water tank 40 and stored, and the water 16 is pumped up from the water tank 40. In the same manner as described above, oxygen-dissolved water is generated in the pressure-dissolving unit 3, and after the pressure is reduced to atmospheric pressure by the decompression unit 4, this oxygen-dissolved water is sent out as growth water. In this embodiment, oxygen-dissolved water is supplied as growth water to the growth tank 17 where the seafood 35 and the plant 36 are grown, and oxygen-dissolved water is used as the growth water for the soil 41 in which the plant 36 is planted. It is made to supply. When oxygen-dissolved water is supplied to the soil 41 as growth water in this manner, the anaerobic portion of the soil can be reduced to prevent the generation of anaerobic pathogens, prevent the occurrence of disease, and from the root of the plant 36. The growth rate can be improved by increasing the oxygen supply.

  In the embodiment of FIG. 10, the oxygen-dissolved water produced as described above is stored in the tank 42. In this embodiment, a tank 42 is mounted on a transport vehicle 44 such as a truck provided with a ginger 43, and the tank 42 is connected to the ginger 43 by a supply pipe 46 through an on-off valve 45. The oxygen concentration of the water 16 in the ginger 43 is measured by an oxygen concentration meter 47 provided in the ginger 43. When the oxygen concentration falls below a predetermined value, the open / close valve 45 is opened, and the oxygen-dissolved water stored in the tank 42 is grown. Oxygen dissolved in the oxygen-dissolved water is supplied to the ginger 43 as irrigation water. When the oxygen concentration meter 47 measures that the oxygen concentration in the ginger 43 has recovered to a predetermined value, the on-off valve 45 is closed and the supply of oxygen-dissolved water is stopped.

It is the schematic which shows an example of embodiment of this invention. It is the schematic which shows an example of a part of the same as the above. It shows another example of a part of the above, (a) (b) (c) is a schematic diagram respectively. It shows another example of a part of the above, (a) is a schematic view, (b) is a perspective view. It is the schematic which shows another example of a part of the same as the above. (A) (b) is a perspective view which shows an example of embodiment of this invention. It is a graph which shows the relationship between the oxygen concentration of oxygen dissolved water, and temperature. (A) is a graph showing the relationship between the oxygen concentration of oxygen-dissolved water and elapsed time, and (b) is a graph showing the relationship between the oxygen concentration of oxygen-dissolved water and temperature. It is the schematic which shows another example of embodiment of this invention. It is the schematic which shows another example of embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pressurization part 2 Oxygen injection part 3 Pressurization melt | dissolution part 4 Depressurization part 5 Excess oxygen discharge part 6 Flow path 7 Pressure regulating valve 8 Extension flow path 11 Oxygen concentration detection control part

Claims (5)

An apparatus for producing oxygen-dissolved water as biological growth water for growing plants and seafood, wherein a pressurizing unit that pumps water, an oxygen injection unit that injects oxygen into water, and water into which oxygen is injected are added. The pressure dissolving part that dissolves oxygen in water by pressurizing by the pressure part, and the pressure of the oxygen-dissolved water in which oxygen is dissolved in the pressure dissolving part are changed from the inflow side to the outflow side of the oxygen-dissolved water. A plurality of pressure-reducing portions that are sequentially reduced to atmospheric pressure, the pressure-reducing portion being provided in a flow path for sending oxygen-dissolved water from the pressure-dissolving portion, and gradually reducing the pressure of the oxygen-dissolved water to atmospheric pressure. The pressure regulating valve is configured to continuously operate each part of the pressurizing unit, the oxygen injecting unit, and the pressurizing and dissolving unit, continuously supplying oxygen-dissolved water to the decompression unit, and flowing the oxygen-dissolved water. stepwise pressure was gradually reduced by vacuum unit, not from the outlet side of the pressure reducing portion of the generation of bubbles of oxygen dissolved Apparatus for producing a biological water for raising which is characterized by comprising as to water continuously discharged.   The apparatus for producing water for biological growth according to claim 1, comprising a surplus oxygen discharge unit that discharges surplus oxygen that does not dissolve in water in the pressure dissolution unit. The apparatus for producing biological growth water according to claim 1 or 2 , wherein the decompression unit is formed by a single flow path. The sum of the pressure loss of the flow path for sending oxygen-dissolved water from the pressure-dissolving part and the pressure loss of the extension flow path added to this flow path is the inside of the pressure-dissolving part due to the pushing pressure of water and oxygen pumped by the pressure part. The water for biological growth according to any one of claims 1 to 3 , wherein an extension channel is added to the channel so that the pressure required to pressurize the water and oxygen is obtained. manufacturing device. An oxygen concentration detection control unit that measures the oxygen dissolution concentration of oxygen-dissolved water and controls at least one of the pressure of water pumped by the pressurization unit and the flow rate of water pumped by the pressurization unit based on the measurement result The apparatus for producing water for biological growth according to any one of claims 1 to 4 , wherein the apparatus is provided.

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