JP2009022847A - Aeration mixing and circulation equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide aeration mixing and circulation equipment which purifies a closed water area by a water temperature limitation effect in an active layer of phytoplankton by mixing surface water, an active light limitation effect on phytoplankton by expansion of a mixing and circulation layer, a dilution effect of surface water with high phytoplankton content, and the like. <P>SOLUTION: A suction pipe 4 of which the inflow port sinks under the water surface of a closed water area, such as a dam reservoir, a lake, a closed sea area, or the like, communicates to be connected with the suction side of a pump 3, and a water pipe arranged with a discharge port in an anoxic water mass layer in a dam reservoir, a lake, a closed sea area, or the like and arranged with an aeration means for diffusing air or oxygen immediately near to the pump is arranged on the delivery side of the pump. An aeration means diffusing air, oxygen, or ozone is arranged at a water depth position located inside a tubular body having one end which is a discharge port under the water surface and having the other end which is an inflow port at a position of a thermocline, and ensuring an air lift pumping capacity and additionally saving energy. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention achieves energy saving by supplying drought oxygen water to anoxic water masses in closed water areas such as dam reservoirs, lakes, marine areas, etc., or water in a closed water area stratified by a difference in water temperature. A diffusing means is installed at a sufficient depth to form an air lift pump, which mixes with surface water to limit the water temperature in the active layer of the phytoplankton, and expands the circulating mixed layer to increase the activity light of the phytoplankton. An aerated mixing and circulation facility that purifies closed waters by diluting surface water with a limiting effect and high phytoplankton.

In lake water, an apparatus for controlling air diffusion from a plurality of air diffusers arranged in several upper and lower stages using information from a lake inflow measuring device and an automatic water quality measuring device is disclosed (for example, Patent Document 1). .
In addition, an inflow hole is provided in the lower part of the inner cylinder, and an air diffuser is disposed at the upper part of the inflow hole to reduce the water flow rate and the air discharge flow rate due to the air lift upflow and to extend the flow path length with the outer cylinder. An apparatus for ensuring oxygen dissolution is disclosed (for example, Patent Document 2).
In lake water, deep aeration circulation that diffuses air from the air diffuser into the water and induces the surrounding water by the upward flow of bubbles to form a rising water flow and then a horizontal flow to a downward flow. The switching valve corresponding to each air diffuser of the air diffuser having a multistage air diffuser is operated by an information signal from the water quality automatic measuring device (for example, Patent Document 3).
And the ozone water manufacturing apparatus which melt | dissolves ozone gas in water with an ejector is disclosed (for example, patent document 4).

Japanese Patent No. 2590452 (Japanese Patent Laid-Open No. 7-251196) JP-A-2005-58954 Japanese Patent No. 2590425 JP 2003-144875 A

  However, in the conventional aeration and circulation facility, the aeration means is disposed in the deep layer portion. However, the oxygen solubility is the same as when the aeration means is disposed in the shallow layer portion and disposed in the deep layer portion. No means for obtaining was disclosed.

  Further, as compared with the case where the air diffuser is disposed in the shallow layer portion, the power cost increases in proportion to the power of the water depth (water pressure) when disposed in the deep layer portion.

  Moreover, there is a problem that the oxygen solubility in water is small if the aeration means is simply disposed in the shallow layer portion.

  In addition, in the conventional measures against sea otters in closed water areas, the air diffuser is disposed in the deep layer, but the air diffuser is disposed in the shallow layer to directly mix the water in the deep layer with the surface water. Thus, the knowledge of forming a circulating flow has not been disclosed.

  Then, the air diffuser is disposed in the shallow layer part, and the discharge depth or the inlet water depth position and the blower for achieving energy saving on the surface of the water temperature climatic layer with the information from the automatic water quality measuring device and the water depth sensor, and the blower, The water depth selection and operation operation means for controlling the operation of the pump and the like have not been disclosed.

  Further, as compared with the case where the air diffuser is disposed in the shallow layer portion, the power cost increases in proportion to the power of the water depth (water pressure) when disposed in the deep layer portion.

    This invention makes it the 1st subject to obtain the oxygen solubility similar to the case where an aeration means is arrange | positioned in a shallow layer part, and it arrange | positions in a deep layer part. Another object of the present invention is to arrange a diffuser in the shallow layer portion to directly mix the water in the deep portion with the surface layer water and to generate a circulating flow. The third problem is to control the water depth selection and operation to control the discharge port or inlet water depth position and the operation operation of the blower, pump, etc. with the information from the water quality automatic measuring device and the outlet or inlet water depth sensor. And

In order to achieve the above object, the present invention has a technical configuration as described below. That is, the first problem-solving means is to arrange a suction pipe with an inlet sinking below the surface of the water on the suction side of the pump, and an outlet in an anoxic water mass layer such as a dam reservoir, a lake, or a closed sea area. In addition, a water supply pipe having a diffuser for diffusing air or oxygen in the immediate vicinity of the pump is arranged on the delivery side of the pump.

  The second problem-solving means is an inside of a tubular body having one end that is a discharge port under the surface of a closed water area and the other end that is an inflow port at an arbitrary depth, and has an air lift pumping capacity. In addition to ensuring, an aeration means for diffusing air, oxygen or ozone is disposed at a water depth position where energy is saved.

  The third problem solving means is a water depth selection and operation operation means for controlling the operation position of the outlet or inlet water depth and the blower, pump, etc. by the information signal from the water quality automatic measuring device and the water depth sensor.

    The operation of the first problem solving means is as follows. In other words, a suction pipe with an inflow hole settling in an aquifer that is below the surface of the water and has no suspended solids is placed on the suction side of the pump, and an outlet is placed in an anoxic water mass layer such as a dam reservoir, lake, or closed water area. If a water supply pipe with a diffuser means for diffusing air or oxygen in the immediate vicinity of the pump is installed on the delivery side of the pump, water containing phytoplankton such as blue sea urchins is at an arbitrary depth by the pump. In order to prevent sedimentation bottom mud from being rolled up into the anoxic water mass layer, the water is discharged with the discharge port slightly upward and slightly above the horizontal direction. When water is supplied by a pump so as to be higher than the rising speed of air diffused from the gas means, the solubility of the oxygen gas in the bubbles in water increases as the air bubbles diffused move from the shallow layer to the deep layer. Then, when sputum oxygen water with increased oxygen solubility is discharged to the deep layer of oxygen-deficient water, soot-oxygen water and the oxygen-deficient water are mixed and diffused, and the other part of the The air or fine bubbles dissolved in the water gradually grow into large bubbles, generate a large ascending force, entrain the surrounding water mass, and rise to the water surface. Accordingly, the deep anoxic water mass is drought oxygenated and the water temperature rises, the upper high temperature water mass and the deep low temperature water mass are mixed, and the upper high temperature water mass descends with the swirling descending water flow. Then, the phytoplankton that lived in the upper layer will be killed by being transported to a low temperature and lightless environment.

  The operation of the second problem solving means is as follows. That is, inside the tubular body having one end that is a discharge port under the surface of a closed water area and the other end that is an inflow port in the water temperature layer, energy saving is achieved while securing the air lift pumping capacity. By disposing a diffuser that diffuses air, oxygen, or ozone at the depth of the water, the water in the cool water layer, which is cold, raises the phytoplankton at a high temperature in the upper layer without mixing with water at the intermediate water temperature. While directly mixing with the water contained in the concentration, the water surface layer flows radially and further downward, forming a circulating mixed layer between the water temperature layer and the water surface layer. As a result, when the water temperature of the water surface layer is lowered, the active growth of phytoplankton is restricted, and the phytoplankton concentration is lowered due to the dilution effect. Moreover, the phytoplankton carried by the circulating flow from the water surface layer to the water temperature striking layer decreases due to the low water temperature growth limiting effect and the light limited growth suppressing effect.

  In addition, the water depth position of the outlet or inlet is controlled by the information signal from the water quality automatic measuring device and the outlet or inlet position depth sensor, and the arbitrary outlet or inlet water depth position is selected. Select the outlet or inflow water depth position to be operated by an electric elevator or the like. Further, it is possible to add an action of controlling the blower and the pump discharge amount that are inverter-controlled by the information signal of the water depth sensor.

  Since the present invention is configured as described above, the following effects can be obtained.

  Even if the air diffuser is disposed in the shallow layer, the oxygen solubility is similar to that in the case where it is disposed in the deep layer, so that there is a water purification effect.

  The risk of cavitation increases as the amount of air diffused by installing the air diffuser on the suction side of the pump, but the risk of cavitation decreases if the air diffuser is installed on the delivery side of the pump.

  Since oxygen is supplied to the deep anoxic water mass, there is an effect of suppressing re-elution of sparingly soluble nutrients by anaerobic bacteria.

  When air that does not dissolve in water in the deep layer rises toward the water surface, a circulating mixed layer from the surface layer to the deep layer is formed, and water and air, oxygen, ozone, etc. in the water temperature rise layer rise to the water surface due to the air lift pump effect Then, when the circulating mixed layer is formed, the surface water containing phytoplankton is advected and mixed to the deep layer or the water-climbing layer, and the low-temperature deep water or water-climbing layer water is advected and mixed to the surface layer and the phytoplankton is unlikely to grow abnormally. That is, it has the effect of creating an environment such as limiting surface temperature rise, limiting light to phytoplankton, and diluting surface water having a high number of phytoplankton solids.

  Since the water in the water temperature striking layer at a low temperature is not mixed with the water in the middle temperature layer, the effect of lowering the water temperature in the water surface layer at a high temperature is greater.

  In addition, since the diffuser is disposed in the shallow layer, even if the same amount of air as that in the deep layer is supplied, the discharge pressure corresponding to the water depth difference can be reduced, thus reducing the discharge pressure. There is a corresponding reduction in required power costs.

  In addition, it has the effect of preventing global warming commensurate with power reduction.

  In addition, blue-green (phytoplankton) can be sterilized by diffusing ozone-containing air.

  Further, by providing the water depth sensor, there is an effect that the discharge port or the inlet water depth position can be selected steplessly.

  An embodiment of the present invention will be described with reference to FIGS.

  In the first embodiment according to the first invention shown in FIG. 1, one end of a water absorption pipe 4 is connected to the suction side of a pump 3 disposed in a floating tank 2 equipped with a float 1 and the water absorption pipe 4 is connected. A water suction port 4b for absorbing water through the screen 5 is disposed in a water layer below the surface of the water and free of suspended matter, and a water pipe 7 inside the diffuser 6 is provided on the delivery side of the pump 3. The discharge port 7a which is the other end of the water supply pipe 7 is disposed in a deep water layer without bottom mud, and the discharge water from the discharge port 7a is discharged upward. It is necessary to discharge the discharged water upward so that the discharge direction of the discharge water is slightly more than the horizontal direction. Then, the high-concentration air-dissolved water is mixed with the deep anoxic water mass, and the bubbles rise toward the water surface while encircling the surrounding water mass and form a circulating flow toward the deep layer. In this embodiment, air is diffused by supplying air to the diffuser 6 from a blower installed on the ground (not shown) and an air supply pipe. However, oxygen is diffused by supplying oxygen as an alternative to air according to the water quality. You can also. The weight 8 balances the levitation tank 2 against wind and waves, and the anchor 9 prevents outflow.

  In the second embodiment according to the first invention shown in FIG. 2, a pump 3 is disposed in the pump chamber 10 on the ground as an alternative to the floating tank 2 in FIG. 4 and the water pipe 7 are connected in communication.

  In the third embodiment according to the first invention shown in FIG. 3, one end of the flexible hose 11 is connected to the discharge port 7a which is the other end of the water pipe 7 in FIG. The electric elevator 13 is remotely controlled by visually observing a signal information monitor (not shown) of the water depth sensor 12 through the discharge port 11a which is the other end.

  In the first embodiment according to the second invention shown in FIG. 4, three cylindrical air lift bodies 14A, 14B, and 14C having different lengths are suspended from the floating tank 2 equipped with the float 1. The three cylindrical air lift bodies 14A, 14B, and 14C have the discharge port 14a immersed under the water surface and the water intake port 14b disposed in the water temperature rising layer. Further, the diffuser 6 is suspended and immersed in the shallow cylindrical position below the water surface in the three cylindrical air lift main bodies 14A, 14B, and 14C, and the diffuser 6 is connected from a blower and an air supply pipe (not shown). When the water in the water warming layer is pumped up in the direction of the surface of the water by blowing air to the air, the gas-liquid mixed water collides with the conical baffle plate 15, and the water flow changes in a substantially horizontal direction. Thus, a circulating flow toward the water inlet 14b is formed. In this embodiment, air is supplied and diffused, but oxygen or ozone-containing air can be supplied and diffused as an alternative to air according to the water quality. The water depth at which the diffuser 6 is disposed is selected based on the determination that the mixing and the circulation flow can be generated by the head by the air lift effect and the energy saving can be achieved. In the present embodiment, the air is diffused at three locations simultaneously, but it is also possible to select one location or two locations to diffuse.

  In the second embodiment according to the second invention shown in FIG. 5, the discharge port 14a of the air lift body 14 is immersed below the water surface, and the water suction port 14b of the air lift body 14 is disposed in the water temperature layer. ing. Further, a conical baffle plate 15 is provided for changing the direction of the water discharged upward from the discharge port 14a in the horizontal direction.

  In the first embodiment according to the third invention shown in FIG. 6, a telescopic hose 16 that is telescopic in the cylinder longitudinal direction of the cylindrical air lift body 14 of FIG. 5 is connected in communication. The telescopic hose 16 can be expanded and contracted by automatically moving the electric elevator 13 in accordance with an information signal from a water quality measuring device (not shown) and the water depth sensor 12 to adjust the water depth of the water intake 16b. change. In the present embodiment, the electric elevator 13 is automatically lifted and lowered by an information signal from a water quality measuring device and the water depth sensor 12 not shown in the figure, but the electric elevator 13 can be manually lifted and lowered by visually observing the information signal. I can do it.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic longitudinal cross-sectional view of the deep layer aeration apparatus which shows the 1st Example concerning 1st invention. The schematic longitudinal cross-sectional view of the deep layer aeration apparatus which shows the 2nd Example concerning 1st invention. The schematic longitudinal cross-sectional view of the deep layer aeration apparatus which shows the 3rd Example concerning 1st invention. The schematic longitudinal cross-sectional view of the closed water area aeration mixing circulation facility which shows the 1st Example concerning 2nd invention. The schematic longitudinal cross-sectional view of the closed water area aeration mixing circulation facility which shows the 2nd Example concerning 2nd invention. The schematic longitudinal cross-sectional view which shows the 1st Example concerning 3rd invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Float 2 Floating tank 3 Pump 4 Water absorption pipe 4b, 14b, 16b Water inlet 5 Screen 6 Diffuser 7 Water supply pipe 7a, 11a, 14a Discharge port 8 Weight 9 Anchor 10 Pump chamber 11 Flexible hose 12 Water depth sensor 13 Electric lift 14A, 14B , 14C, 14 Airlift body 15 Baffle plate 16 Telescopic hose

Claims (3)

  A suction pipe with an inlet sinking below the surface of the water is connected to the suction side of the pump, and a discharge port is provided in the oxygen-poor water layer and air diffuser is provided near the pump to diffuse air or oxygen. Aeration and mixing circulation facility characterized in that the installed water pipe is arranged on the delivery side of the pump   One end is a discharge port under the surface of the water, inside the tubular body having the other end that is an inlet at the position of the water temperature layer, air at a water depth position that saves energy while ensuring air lift pumping capacity, An aeration-mixing facility characterized by disposing an aeration means for diffusing oxygen or ozone. The aeration mixing and circulation facility according to claim 1 or 2, wherein the water quality automatic measuring device, the water level automatic measuring device, and the water depth selection operation means for controlling the water depth position of the discharge port or the inlet port based on information from the outlet or inlet position water depth sensor. .