JP4059346B2 - Water purification system and water flow generating stirring mixer - Google Patents

Description

  The present invention relates to a water purification system for purifying water quality by diffusing air to lakes, rivers, and the like, and a water flow generating and agitating mixer constituting the system. In detail, the water purification system includes a water flow generating and agitating mixer installed in the bottom layer in the water area, and a pump for supplying water to the water flow generating and agitating mixer, and an air suction port is provided on the suction side of the water pump. It relates to a water purification system. The present invention also relates to a water purification system in which the suction port of the water pump is installed on the surface layer up to a depth of about 1 meter, and the water flow generating stirring mixer is installed in the bottom layer of a depth of about 10 meters or less.

  In general, there is no natural convection between surface water and low water in reservoirs and lakes where there is no running water, and organic matter accumulates and methane gas is generated at the bottom of the pond, so low water has almost no dissolved oxygen. It becomes close and fish and algae cannot survive.

  Conventionally, for lakes, rivers, sewage treatment plants, etc., whose water quality has deteriorated as described above, there is known a method in which air is diffused and purified in the water area. There has been proposed a water purification apparatus comprising an installed water jet pump (jet generator), a drive water pump that supplies water to the water jet pump, and an air compressor that supplies compressed air (containing ozone) to the water jet pump. ing.

  Patent Document 2 discloses a self-priming aeration apparatus having a submersible motor installed in a water area and a vent pipe (ejector pipe) for supplying air to the submersible motor, and compressed air (including the self-priming aeration apparatus). A water purification device having a compressor for supplying ozone) has been proposed.

  However, since the above technique requires an air compressor (compressor) for supplying compressed air, not only the facilities become complicated, but the operation noise of the compressor is loud, and there has been a problem of noise generation for neighboring residents. Furthermore, since an ozone generator is essential, there is a problem that the facilities become more complicated.

  Further, the self-priming aeration apparatus provided with the ejector pipe proposed in Patent Document 2 has a problem that the ejector effect cannot be obtained in a deep water depth, for example, a lake, and the air cannot be self-primed.

  Under such circumstances, there has been a demand for a water purification system that does not generate noise, has simple facilities, and is efficient.

  As a result of earnest research in view of such a situation, the present inventor has a water flow generation stirring mixer installed in the water area and a water pump installed outside the water area for supplying water to the water flow generation stirring mixer. By providing an air suction port on the suction side of the water pump, an air compressor is not required, and therefore the amount of dissolved oxygen can be effectively reduced even in low-rise water with simple equipment and no noise. The inventors have found that the present invention has been improved and have completed the present invention.

  In the technique described in Patent Document 2, the water jet pump discharge port has a parallel straight line, and the jet is discharged in a laminar flow. Therefore, mixing with the bottom layer water is not effectively performed, and dissolved oxygen There is a problem that the discharge water containing the water rises and diffuses to the water surface as it is due to the difference in water density, and oxygen cannot be efficiently supplied to the bottom water.

  Furthermore, in the auko phenomenon that is one of the causes of water pollution, the effect of suppressing the aoko phenomenon by inactivating them by instantaneously changing the pressure and / or water temperature to phytoplankton such as aoko. Recognized as an existing technology, in the present invention, the water pump suction port is installed on the surface layer within a depth of about 1 meter, the sea urchin contained in the surface water is sucked together with the surface layer water, and installed in the bottom layer about 10 meters deep or deeper. It was found that a water purification system capable of effectively applying the above pressure and / or water temperature change due to the difference in water depth can be constructed by discharging from the generated water flow stirring mixer.

  In addition, as described in Non-Patent Document 1, a technology for inactivation by retaining phytoplankton such as blue sea urchin in the bottom layer for a long time, blocking the arrival of sunlight, and inhibiting carbon assimilation is recognized as an existing technique. However, the density of the mixed water discharged by the water flow generating and agitating mixer in the present invention is almost the same as that of the bottom layer water, and a sudden increase in water mass due to the density difference does not occur. It was found that can be kept on the blocked bottom layer for a long time.

  In other words, the water purification system and the water flow generating agitating mixer of the present invention compress the pseudo vacuole contained in the cells of the blue-green algae, which is the cause of the aoko phenomenon, with a water pressure of about 1 atm. This reduces the buoyancy of the pseudovacuole and makes it difficult for the blue-green algae to resurface.

  In addition, the present invention releases the sea bream and the like into the bottom water whose temperature is about 5 ° C. lower than the surface layer by giving the above-mentioned water depth difference, hibernates the phytoplankton such as the sea bream and inactivates them. Is.

  Furthermore, the present invention is a carbonic acid assimilation effect in order to retain phytoplankton such as sea cucumbers released to the bottom layer for a long time in the bottom layer where sunlight does not reach by suppressing the water mass rise by compression and / or mixing and stirring of pseudoalgae of cyanobacteria. And can inactivate phytoplankton such as blue sea urchin in combination.

  Based on the results of the above research, the discharge jet flow is achieved by forming a tapered shape with a smaller diameter on the outflow side than the diameter of the inflow side of the water flow generation agitator installed in the water area, and by providing a rectifying plate in the water flow generation agitator mixer. Is a spiral turbulent structure that effectively mixes with the bottom water, and is installed in the water pump suction port installed in the surface layer within a depth of about 1 meter and in the bottom layer about 10 meters deep. The present inventors have found that a water pressure difference and / or a water temperature difference shock can be effectively applied to the watermelon etc. to inactivate it by the water depth difference caused by the generated water flow stirring mixer, and the present invention has been completed.

    JP-A-10-202274     JP 05-293479 A   “Empirical study of algae control by local shading: Sadao Kojima, Kosaku Iida, Akio Namegawa:“ Water and wastewater ”Vo1.42, No. 1 5, P5-12 (2000) "

  The first aspect of the present invention is a water purification system that purifies water quality by diffusing air to lakes, rivers, etc. The equipment is simple, and the amount of dissolved oxygen is effective even in deep water without generating noise. It is an object to provide a water purification system that can be improved.

  Second, in the water purification system that purifies the water quality by diffusing air to lakes, rivers, etc., the surface layer water sent from the water pump is ejected as a spiral turbulent flow, and the bottom layer water and effects An object of the present invention is to provide a water purification system that can be stirred and mixed to improve the poor oxygen state.

  Third, water that can instantaneously apply pressure and / or water temperature changes due to differences in water depth to phytoplankton, such as a giant octopus present in the surface water, to inactivate the octopus, etc. to suppress or prevent the aquatic phenomenon. It is an object to provide a purification system.

  Fourthly, the surface layer water sent from the water pump is effectively stirred and mixed with the bottom layer water, thereby discharging the stirring mixed water substantially equal to the density of the bottom layer water, causing a sudden rise in water mass due to the density difference. It is an object of the present invention to provide a water purification system that can keep discharged water in the bottom layer for a long time.

  A first aspect of the present invention is a water purification system for purifying water quality by diffusing air to lakes, rivers, etc., and a water area for supplying water to the water flow generating agitating mixer installed in the water area The present invention relates to a water purification system comprising a water pump installed outside and an air suction port provided on the suction side of the water pump.

  The second aspect relates to the water purification system according to the first aspect, wherein an air intake port including an air purification filter, an air suction amount adjustment valve, and an electromagnetic sealing valve is connected to the air suction port.

  3rd is related with the water purification system as described in 1 or 2 characterized by the air quantity suck | inhaled from an air suction opening being 20 volume% or less of a water pump water supply quantity.

  Fourth, the water purification system according to any one of the first to third aspects, wherein the amount of air sucked from the air suction port is about 5 to 15% by volume of the water pumping water amount.

  5th is related with the water purification system in any one of 1st-4th characterized by a water pump being a centrifugal pump.

  Sixth, a rectifying plate having an oblique angle with respect to the direction of water flow generation is provided in the flow rectifying cylinder of the water flow generating agitation mixer installed in the water area, and the discharge jet becomes a spiral turbulent flow, effectively It is related with the water generation | occurrence | production stirring stirring mixer characterized by mixing and stirring with water.

  Seventhly, by making the front aperture of the rectifying cylinder smaller than the rear aperture, the jet flow velocity is accelerated, and the turbulent flow generation function of the rectifying plate is made more effective. The present invention relates to an agitator and mixer for generating water flow.

  Eighth, surface water that has been sent by a water supply hose is branched into several outlets having a smaller diameter than the water supply hose at the outlet of the branch pipe, and the surface area of the discharge water is increased by the friction force by increasing the surface area of the discharge water. The water flow generating stirred mixer according to the sixth or seventh aspect, wherein the bottom layer water is forcibly entrained.

  Ninth, in the water generation / stirring mixer and the attached water pump in the water purification system, the inlet of the water pump is installed in the surface layer within about 1 meter depth from the surface of lakes, rivers, etc. The phytoplankton is sucked together with the surface water with a water pump and discharged from a water flow generating and agitating mixer installed in the bottom layer at a depth of about 10 meters or less, resulting in a water pressure differential shock due to the water depth difference between the suction port position and the discharge position. Alternatively, the present invention relates to the water purification system according to any one of 1 to 8, wherein a water temperature differential shock is applied to a giant octopus and the like to inactivate a phytoplankton such as the octopus, thereby suppressing the ako phenomenon.

  Since the water purification system of the present invention can diffuse air into the water area without using an air compressor (compressor) for supplying compressed air, the water quality can be purified without generating noise. There is an effect.

  In addition, since an air compressor (compressor) for supplying compressed air is not used, electrical equipment therefor is unnecessary and the equipment can be simplified.

  Since it is configured to suck air from the air suction port provided on the suction side of the water pump and supply air into the water area, the amount of dissolved oxygen in the supplied water increases due to the water pressure of the pump while reaching the water area. Therefore, there is an effect that the water quality can be effectively purified even for low-layer water and deep-layer water.

  In the water flow generating and agitating mixer of the present invention, since the discharge jet is a spiral turbulent flow, the surface water containing a large amount of dissolved oxygen is easily agitated and mixed with the bottom water, effectively improving the poor oxygen state of the bottom layer. There is an effect that can be done.

  Moreover, the surface water containing the water-filled sea urchins, etc. is stirred and mixed with the bottom layer water and discharged, so that the discharge water density becomes substantially equal to that of the bottom layer water, and the discharge water causes a sudden rise in water mass due to the density difference. It stays in the bottom layer for a long time, and has the effect of inhibiting and inactivating the carbon assimilation action of blue sea bream by blocking sunlight.

  In addition, the water purification system of the present invention inactivates phytoplankton such as blue-green oysters by instantaneously applying pressure and / or water temperature changes to phytoplankton such as blue-green oysters, thereby suppressing the phenomenon of blue-green phytoplankton. Or, there is an effect of prevention.

  The water purification system of the present invention will be specifically described below based on the embodiments shown in the drawings.

  1, 2 and 4 show an embodiment to which a water purification system according to the present invention is applied.

  FIG. 3 shows an embodiment of a water flow generating and agitating mixer according to the present invention.

  In FIG. 1, the water flow generation stirring mixer 5 installed in the bottom part of the closed water area 12 and the water pump 1 provided with the air suction port 3 on the suction side of the pump are provided, and the water pump discharge port 7 and the water flow generation stirring mixing are provided. The machine 5 is connected to the water pump discharge line 4, and the water pump suction port 6 is connected to the water pump suction line 2.

  In the water purification system according to the present invention, water in the closed water area 12 is sucked into the water pump 1 through the water pump suction line 2 and mixed with the air sucked in from the air suction port 3 to generate a water flow through the water pump discharge line 4. It is discharged to the stirring mixer 5 and finally circulated and discharged to the closed water area 12.

  In the above, the air sucked from the air suction port 3 receives the water pressure of the water pump and the water pressure of the closed water area while reaching the inside of the closed water area 12 and is dissolved in the water pump suction water while being dissolved. It is circulated and outflowed. Therefore, it is possible to efficiently purify a closed water area where the amount of dissolved oxygen is almost zero and fish and algae can no longer survive.

  That is, the water purification system of the present invention does not simply diffuse air, but circulates the supply water with an increased amount of dissolved oxygen to the closed water area, so it is also effective for low and deep water. It is possible to purify the water quality.

  Further, it is preferable that the amount of air sucked from the air suction port 3 is arbitrarily controlled by a regulating valve or the like as shown in FIG. That is, the water purification system according to the present invention is configured such that the air suction port 3 is connected to the intake pipe 8 including the air purification filter 11, the air suction amount adjustment valve 9, and the electromagnetic water sealing valve 10. preferable.

  In the above, dust and dust are removed from the air in the atmosphere by the air purification filter 11, and the suction amount is controlled by the air suction amount adjustment valve 9 and guided to the air suction port. And it mixes and melt | dissolves in the suction water which the water pump 1 attracted | sucked, and is finally circulated and discharged | emitted to the closed water area 12. FIG.

  The electromagnetic water sealing valve 10 is fully opened while the water purification system of the present invention is in operation, but in conjunction with the electrical signal of the water pump 1 when an abnormality occurs in the water pump 1 due to electric leakage or power failure. It is configured to be closed.

  In the water purification system of the present invention, the amount of air sucked from the air suction port 3 is preferably 20% by volume or less of the amount of water fed from the water pump 1. If the amount of air exceeds 20% by volume of the water pump 1, the amount of water delivered by the water pump 1 may decrease and a sufficient water flow may not be generated. Is essential. A more preferable amount of air is in the range of 5 to 15% by volume of the water supply amount of the water pump 1.

  The water pump 1 of the water purification system according to the present invention is used by being installed outside the water area as shown in FIG. 1, but also includes floating on the water surface of the water area as shown in FIG. 4. Further, the water pump 1 is preferably a centrifugal pump because it can suck and discharge a large volume of water.

  Moreover, the water flow generation stirring mixer 5 is not particularly limited and can be arbitrarily used as long as it can generate a strong water flow.

  In FIG. 3, an embodiment of the stirring mixer 5 will be specifically described. The surface water supplied from the water pump 1 is branched at the outlet of the branch cylinder 14 into several discharge outlets 15 having a smaller diameter than the water supply hose 13, thereby increasing the surface area of the discharge water. Friction is effectively generated between the water and the water in the rectifying cylinder 17 together with the discharged water, and the water in the rectifying cylinder 17 is forcibly entrained and ejected from the water flow generating and agitating mixer 5. In addition, the bottom layer water behind the rectifying cylinder 17 can be effectively forced to be entrained by the negative pressure due to the eductor effect generated behind the rectifying cylinder 17 at that time.

  In FIG. 3, the discharged water collides with the rectifying plate 16 provided in the rectifying cylinder 17 at the time of ejection, and a spiral turbulent flow is generated at the outlet of the water flow generating and agitating mixer 5 due to the oblique angle of the rectifying plate 16 The water and the bottom layer water are effectively stirred and mixed, and discharged as a discharge jet 21 forward. Further, in order to ensure the effect of the stirring and mixing, it is desirable that the rectifying plate 16 is disposed in front of the rectifying cylinder 17.

  In FIG. 3, by making the front diameter of the flow straightening cylinder 17 into a tapered shape having a diameter smaller than the rear diameter, the discharge water in the flow straightening cylinder 17 is converged near the flow straightening plate 16, and the flow velocity at the time of discharge is accelerated. Combined with this, the function of generating turbulence by the current plate 16 is effectively exhibited.

  In FIG. 4, the water pump suction port 20 is provided in the surface layer 18 having a depth of about 1 meter or less, and the water flow generating stirring mixer 5 is installed in the bottom layer 19 having a depth of about 10 meters or less.

  In the above, when the water pump suction port 20 is within a depth of about 1 meter, phytoplankton such as sea lions present in the surface water can be efficiently sucked.

  In addition, surface water within a depth of about 1 meter often contains abundant dissolved oxygen, and ejecting the surface water to the bottom layer 19 is effective in improving the poor oxygen state of the bottom layer 19.

  In FIG. 4, in order to effectively give the phytoplankton such as blue-green phytoplankton a change in water pressure and / or water temperature due to the water depth difference 22, the installation depth of the water flow generation stirring mixer 5 is a water pressure of about 1 atm or more in gauge pressure. A depth of about 10 meters or less where the water temperature falls by about 5 ° C. or more is preferable.

  Further, in the water purification system according to FIG. 4, the water flow generating and agitating mixer 5 is not particularly limited and can be arbitrarily used as long as it can discharge surface layer water to the bottom layer 19.

EXAMPLES Hereinafter, the water purification system of the present invention will be described in more detail based on examples, but the present invention is not limited to these examples.

  The water purification system of the present invention was carried out on the water source pond, which was 300 meters long, 170 meters wide, 11 meters deep, and the water storage capacity of about 112,000 cubic meters, and the amount of dissolved oxygen before and after purification was measured. . The measurement point was 20 meters from the outlet of the water generation stirring mixer.

Implementation conditions Implementation season Spring
Water pump volume 550 liters per minute
Suction air volume 50 liters per minute (9.1% by volume of water flow rate)
Implementation period 51 days

Implementation results

  The water purification system of the present invention was carried out on the water source pond, which was 300 meters long, 170 meters wide, 11 meters deep, and the water storage capacity of about 112,000 cubic meters, and the amount of dissolved oxygen before and after purification was measured. . The measurement point was 20 meters from the outlet of the water generation stirring mixer.

Implementation conditions Implementation season Autumn
Water pump volume 550 liters per minute
Suction air volume 55 liters per minute (10.0% of water volume)
Implementation period 31 days

Implementation results

  The water purification system of the present invention was carried out for the closed water area in the dam lake, where the aoko was generated, 200 meters in length, 100 meters in width, and 30 meters in depth, and the number of Anavena cells before and after purification was measured. The measurement point was set at 10 meters from the outflow destination of the water flow generation stirring mixer.

Implementation conditions Implementation season Autumn
Water pump water volume 1,000 liters per minute
Suction air volume 100 liters per minute (10.0% by volume of water flow rate)
Implementation period 60 days

Implementation results

  It is explanatory drawing which shows the example of application of the water purification system which shows embodiment of this invention.   It is detail drawing of the air suction opening shown in FIG.   It is explanatory drawing which shows the example of application of the water flow generation | occurrence | production stirring mixer which shows embodiment of this invention.   It is explanatory drawing which shows the example of application of the water purification system which shows embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Water pump 2 Water pump suction line 3 Air suction port 4 Water pump discharge line 5 Water flow generation stirring mixer 6 Water pump suction port 7 Water pump discharge port 8 Intake pipe 9 Air suction amount adjustment valve 10 Electromagnetic seal valve 11 Air Purification filter 12 Closed water area 13 Water supply hose 14 Branch pipe 15 Discharge port 16 Rectifier plate 17 Rectifier cylinder 18 Surface layer 19 Bottom layer 20 Suction port 21 Discharge jet 22 Water depth difference between the water pump suction port and the discharge position of the water generating agitated mixer

Claims (3)

In a water purification system comprising a water pump that is installed outside the water area or on the water surface of the water area, and a water flow generating and stirring mixer,
The water pump has an air suction part composed of an air purification filter, an air suction amount adjustment valve and an electromagnetic sealing valve, and the water flow is taken together with the surface water pumped up from lakes, rivers, etc., from the air suction part. Supply to the generated stirring mixer,
The water flow generation and agitation mixer is disposed in the bottom layer of a lake, river, etc., and the air-containing surface water supplied from the water pump is discharged to the bottom layer of a lake, river, etc.,
The electromagnetic water sealing valve is open when the water pump is normal, allowing air to flow into the water pump, and closed when abnormal, preventing air from flowing into the water pump. Water purification system. The water flow agitating and mixing machine is arranged so that its axial direction is parallel to the bottom surface of lakes, rivers, etc., and receives air-containing surface water supplied from a water pump from its axial direction and discharges it in the axial direction. The water purification system according to claim 1, wherein the water purification system is disposed . The water flow generation and agitation mixer can make the air-containing surface water supplied from the water pump into a plurality of diversion waters and discharge them to the bottom layers of lakes, rivers, etc. together with the bottom water entrained in these diversion waters The water purification system according to claim 1 or 2, wherein

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