JP4869122B2 - Cooling method and cooling device - Google Patents

Description

  The present invention relates to a cooling device in many cooling towers and the like used in each industry and a cooling method using the same, and in particular, nanobubbles and various nanosize chemicals are efficiently generated in the cooling device, and the nanobubbles are generated. And various nano-sized chemicals in the cooling water, cooling water quality improvement in the cooling tower, heat exchange efficiency improvement, energy saving promotion and cooling that can greatly reduce the amount of water treatment chemicals added to the cooling water The present invention relates to an apparatus and a cooling method.

  Conventionally, the cooling tower is used in many industries to cool the cooling medium with water as a heat medium. Cooling towers are round and square, and are a type of heat exchanger that cools the internal cooling medium by directly or indirectly contacting a heat medium such as water with the atmosphere, especially outdoors. Installed.

  The cooling water of this cooling tower is suitable for the growth of microorganisms such as bacteria and amoeba because of the water temperature, and Legionella spp. Furthermore, care must be taken because the aerosol of cooling water is scattered in the air. Therefore, during the period of use of the cooling tower, in order to suppress the growth of Legionella spp., Agents such as bactericides are often continuously added. Examples of this agent include a chlorine agent.

  Furthermore, water treatment is performed in order to maintain the cleaning and sterilizing effects of the cooling tower. Further, if the cooling water is excessively concentrated, scale, slime, corrosion or the like is generated in the cooling device, and the cleaning and sterilizing effects are lost. Therefore, as a countermeasure, for example, forcibly blowing cooling water and replenishing water to suppress concentration is performed. In general, scale, slime or anti-corrosion agent is added at an appropriate concentration.

  By the way, as a prior art, for example, Patent Document 1 discloses a nanobubble utilization method and apparatus related to a cleaning process. The prior art disclosed in Patent Document 1 includes a reduction in buoyancy of nanobubbles, an increase in surface area, an increase in surface activity, generation of a local high-pressure field, and a surface active action and a bactericidal action by realizing electrostatic polarization. Utilizes the characteristics. More specifically, Patent Document 1 discloses that various objects are highly functional and have a low environmental load by the function of adsorbing dirt components, the high-speed cleaning function of the object surface, and the sterilizing function because they are related to each other. It is disclosed that it is possible to purify polluted water by washing with the above.

  As another conventional technique, for example, Patent Document 2 discloses a method for generating nanobubbles regarding sewage treatment. The prior art disclosed in Patent Document 2 includes (1) a step of decomposing gas in a liquid, (2) a step of applying an ultrasonic wave in the liquid, or (3) a liquid. A part of the gas is decomposed and gasified and an ultrasonic wave is applied.

As another conventional technique, for example, Patent Document 3 discloses a waste liquid purification treatment apparatus using ozone microbubbles. In this Patent Document 3, the ozone gas generated by the ozone generator and the waste liquid extracted from the lower part of the treatment tank are supplied to the microbubble generator via a pressure pump, and further generated. It is disclosed that ozone microbubbles are vented into waste liquid in a treatment tank through an opening of a gas blowing pipe.
JP 2004-121962 A JP 2003-334548 A JP 2004-321959 A

  However, the above-mentioned conventional patent documents 1 to 3 relate to cleaning treatment and sewage treatment and not to heat exchange in the cooling tower of the cooling device, and these conventional techniques have the following problems.

  In the conventional Patent Documents 1 to 3, it is disclosed that when nanobubbles are contained in the cooling water of the cooling tower and circulated, the contained organic matter is oxidized by the strong oxidizing action of the nanobubbles, and the water quality is improved. Not. In addition, in the above-mentioned conventional patent documents 1 to 3, when producing nanobubbles, if a small amount of sodium hypochlorite solution, which is a chemical for cooling towers, is nanosized and mixed, the water quality is further greatly improved. No improvement is disclosed.

  Furthermore, in the above-mentioned conventional patent documents 1 to 3, when nanobubbles are contained in the cooling water of the cooling tower, the generation of algae is suppressed due to the strong oxidizing action of the nanobubbles, and water treatment chemicals related to cooling water are reduced. It is not disclosed that it will be possible. Furthermore, in the above-mentioned conventional patent documents 1 to 3, the water quality of the cooling water is detected by TOC (total organic carbon; total organic carbon; total, organic carbon), and the rotation of the gas-liquid mixing circulation pump 28 is matched to the water quality. It is also not disclosed that an energy saving effect is secured when the number is controlled.

  Further, in Patent Documents 1 to 3, when nanobubbles are contained in the cooling water of the cooling tower, it becomes gas-liquid mixed cooling water, and the efficiency (thermal efficiency) of heat exchange related to the heat exchange pipe (coil) of the cooling tower is improved. Neither is it disclosed that energy saving is possible. Furthermore, Patent Documents 1 to 3 do not disclose that the heat exchange pipe is always washed by nanobubbles as a reason for improving the thermal efficiency.

  Further, in Patent Documents 1 to 3, when a filler is installed in the cooling tower and the cooling water is circulated, strong microorganisms propagate in the filler with the passage of time, and the cooling water is treated with water by these microorganisms. Neither is it disclosed. Furthermore, although the above-mentioned Patent Documents 1 to 3 intensively propagate microorganisms in the filler, it is not disclosed that the growth of microorganisms is suppressed in water other than the filler and other wetted parts.

  Therefore, when the cooling tower of the conventional cooling device is operated for a long time, various substances are dissolved in the cooling water from the outside air. As a result, the quality of the cooling water deteriorates, the efficiency of heat exchange deteriorates, Various problems occur in the cooling tower, such as growth of microorganisms such as water and amoeba, generation and adhesion of scales and slime, and increase in the use of anti-corrosion chemicals, achieving energy saving. There is a problem that you can not.

  The present invention solves the above-mentioned conventional problems, and even if it is operated for a long time, the quality of the cooling water deteriorates, the efficiency of heat exchange deteriorates, microorganisms such as bacteria and amoeba grow, Cooling device that can suppress various troubles related to the cooling tower, such as generation and adhesion of lime and slime, and increase the amount of chemicals used to prevent corrosion, and achieve energy saving, and cooling using the same It aims to provide a method.

The cooling method of the present invention includes an upper water tank for storing and sprinkling cooling water, a heat exchange for cooling the heat exchange medium provided below the upper water tank and sprayed with the cooling water from the upper water tank And a cooling tower having a lower water tank provided under the heat exchange part for receiving and storing the water sprayed, and a string-type polyvinylidene chloride filling, a ring type in the lower water tank a cooling method for cooling the heat exchange medium of the cooling device equipped with at least any of the activated carbon filling the polyvinylidene chloride filler and accommodated in the car, the cooling for cooling the heat exchange medium to the cooling water from the column, nano bubble generator has a circulation process by incorporating at least one of nanobubbles and nanosized chemical circulating in the cooling tower, the string-like form polyvinylidene chloride filler, the And a water treatment step for water treatment of the cooling water by microorganisms propagated in at least one of the ring-type polyvinylidene chloride filler and filled in the accommodating cage activated carbon. At least one of microbubbles and microsize medicinal ingredients is prepared in bathtub water from the bathtub, and this is sheared or sheared and crushed to have a diameter of 100 nm to several hundred nm (excluding 500 nm or more). This achieves the above object.

  Preferably, the circulation step in the cooling method of the present invention is configured such that the residual chlorine concentration control means causes the nanobubble generator to contain the nanobubbles in the cooling water according to the residual chlorine concentration in the cooling water. Or the cooling water is controlled to contain the nanosized chemical solution.

  Further preferably, the circulation step in the cooling method of the present invention is such that the TOC concentration control means controls the nanobubble generator with respect to the nanobubble generator in accordance with the TOC (total organic carbon) concentration in the cooling water. Or the amount of the nanosized chemical solution is controlled.

The cooling device of the present invention includes an upper water tank for storing and sprinkling cooling water, and heat for cooling the heat exchange medium that is provided below the upper water tank and the cooling water is sprinkled from the upper water tank. a replacement unit, a cooling tower and a lower water tank for storing receiving the cooling water sprinkled provided below the heat exchange unit, the cooling from the cooling tower for cooling the heat exchange medium A nanobubble generator that contains at least one of nanobubbles and nanosized chemical solution in water and circulates in the cooling tower, and in the lower water tank, water treatment of the cooling water is performed by the propagated microorganisms At least one of a string-type polyvinylidene chloride filler, a ring-type polyvinylidene chloride filler, and activated carbon filled in a container is installed . Therefore, the above object can be achieved.

  Preferably, in the cooling device of the present invention, the nanobubble generator generates the nanobubble or the nanosized chemical solution according to the residual chlorine concentration in the cooling water. It further has a residual chlorine concentration control means for controlling.

  Further preferably, in the cooling device of the present invention, the TOC for controlling the amount of the nanobubbles generated or the amount of the nanosized chemical solution to the nanobubble generator according to the TOC concentration in the cooling water. It further has a density control means.

  Further preferably, the cooling water in the lower water tank in the cooling device of the present invention is transferred to the upper water tank through at least the nano bubble generator out of the nano bubble generator and the watering pump, and the heat from the upper water tank. It is circulated so as to return to the lower water tank through the exchange unit.

  Further preferably, the nanobubble generator in the cooling device of the present invention comprises a gas-liquid mixing / circulation pump for mixing and shearing cooling water and gas supplied from the cooling tower to produce clouded water of microbubbles, and the gas-liquid A gas shearing section for generating nanobubbles by shearing microbubbles supplied from the mixing circulation pump.

  Further preferably, the nanobubble generator in the cooling device of the present invention includes a gas-liquid mixing circulation pump for producing a micro-sized chemical liquid cloudy water by mixing and shearing the cooling water and the chemical liquid supplied from the cooling tower. And a gas shearing section for generating a nanosized chemical liquid by shearing the microsized chemical liquid supplied from the gas-liquid mixing circulation pump.

  Further preferably, in the nanobubble generator in the cooling device of the present invention, microbubble white water or / and microsized by mixing and shearing a gas or / and a chemical solution in the cooling water supplied from the cooling tower. A gas-liquid mixing / circulation pump for producing cloudy water of a chemical liquid, and a microbubble or / and a micro-sized chemical liquid supplied from the gas-liquid mixing / circulation pump are sheared to produce nanobubbles / and / or a nano-sized chemical liquid A gas shearing portion to be generated.

  Furthermore, preferably, the nanobubble generator in the cooling device of the present invention further includes a gas supply valve that can supply the gas to the gas-liquid mixing circulation pump.

  Further preferably, the nanobubble generator in the cooling device of the present invention includes a chemical tank in which a chemical for treating the cooling water is stored as a liquid, a chemical tank pump capable of sucking the chemical from the chemical tank, And a chemical solution supply valve that can supply the chemical solution from the chemical solution tank pump to the gas-liquid mixing and circulating pump.

  Further preferably, the residual chlorine concentration control means in the cooling device of the present invention includes a residual chlorine meter for detecting the residual chlorine concentration in the cooling water, and a gas supply when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value. The valve for the chemical liquid is opened and the valve for chemical liquid supply is closed to generate nanobubbles for the gas-liquid mixing circulation pump, and when the detection result is lower than a predetermined reference value, the chemical liquid tank pump is A residual chlorine controller that operates and generates a nanosized chemical liquid to the gas-liquid mixing circulation pump with the gas supply valve closed and the chemical liquid supply valve open.

  Further preferably, the residual chlorine concentration control means in the cooling device of the present invention includes a residual chlorine meter for detecting the residual chlorine concentration in the cooling water, and the chemical solution when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value. Operate the tank pump, open both the gas supply valve and the chemical solution supply valve in a low-open state to generate a low amount of nanobubbles and nanosized chemical solution to the gas-liquid mixing circulation pump, When the detection result is lower than a predetermined reference value, the chemical solution tank pump is operated, and both the gas supply valve and the chemical solution supply valve are opened at a high opening degree with respect to the gas-liquid mixing and circulation pump. And a residual chlorine regulator that generates high volumes of nanobubbles and nanosized chemicals.

  Further preferably, the residual chlorine concentration control means in the cooling device of the present invention includes a residual chlorine meter for detecting the residual chlorine concentration in the cooling water, and a gas when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value. When the supply valve is in the open state and the chemical solution supply valve is in the closed state, nano bubbles are generated in the gas-liquid mixing circulation pump, and the chemical solution tank pump is used when the detection result is lower than a predetermined reference value. And a residual chlorine controller that generates both nanobubbles and nanosized chemical liquid for the gas-liquid mixing circulation pump with both the gas supply valve and the chemical liquid supply valve open.

  Further preferably, the residual chlorine meter in the cooling device of the present invention is installed in the lower water tank or the upper water tank to detect the residual chlorine concentration in the cooling water in the water tank.

  Further preferably, the TOC concentration control means in the cooling device of the present invention includes a TOC meter for detecting the TOC concentration in the cooling water, and a motor rotation speed control means when the detection result by the TOC meter is a predetermined reference value or more. The gas-liquid mixing and circulating pump is controlled to increase the motor speed, and when the detection result is lower than a predetermined reference value, the motor of the gas-liquid mixing and circulating pump is controlled via the motor speed control means. A TOC controller that controls the rotational speed to be low.

  Further preferably, the TOC meter in the cooling device of the present invention is installed in the lower water tank or the upper water tank to detect the TOC concentration in the cooling water in the water tank.

  Further preferably, the chemical solution in the cooling device of the present invention is a solution in which at least one of sodium hypochlorite, bromide salt and polyacrylate is dissolved.

  Further preferably, the gas in the cooling device of the present invention is at least one of air and ozone gas.

  Further preferably, the upper water tank in the cooling device of the present invention has a watering storage tank and a perforated plate provided with a large number of small holes at the bottom of the watering storage tank, Water is sprinkled from the small holes of the heat exchange medium, and the heat exchange medium is composed of a large number of heat exchange pipes flowing inside.

  Further preferably, in the cooling device of the present invention, the cooling water scattering prevention louver attached so as to surround the outer periphery of the plurality of heat exchange pipes, and the cooling water scattering prevention louver. And a fan for exhausting the internal air after the heat exchange that has passed through the exchange pipe to the outside.

  The operation of the present invention will be described below with the above configuration.

  The inventors of the present application have found that (1) when nanobubbles are contained in the cooling water of the cooling tower and circulated, the contained organic matter is oxidized by the strong oxidizing action of the nanobubbles, and the water quality is improved. Although microbubbles also have an effect of preventing slime and scale from being generated in the cooling tower to some extent, nanobubbles have a greater water quality improvement effect on the cooling tower due to stronger oxidizing and cleaning actions. Is obtained. In addition, the inventors of the present application have found that when nanobubbles are produced, if a small amount of sodium hypochlorite solution, which is a treatment chemical for cooling towers, is nanosized and mixed, the water quality is further greatly improved. It was. By containing the nanosized chemical liquid in the cooling water, the action of the chemical can be improved by a small amount.

  In addition, the inventors of the present application (2) When nanobubbles are contained in the cooling water of the cooling tower, generation of algae and the like is suppressed by the strong oxidizing action of the nanobubbles, and water treatment chemicals related to the cooling water can be further reduced. I found out.

  Further, the inventors of the present application (3) can detect the water quality of the cooling water based on the TOC (total organic carbon) concentration and control the rotation speed of the gas-liquid mixing circulation pump according to the water quality, thereby obtaining an energy saving effect. I found out that

  Further, the inventors of the present invention (4) When nanobubbles are contained in the cooling water of the cooling tower, it becomes gas-liquid mixed cooling water, and the heat exchange efficiency (thermal efficiency) is improved in the heat exchange pipe (coil) of the cooling tower. And found that an energy saving effect can be obtained. Moreover, it discovered that there existed an effect | action that a heat exchange pipe is always wash | cleaned by nanobubble as a reason for improving thermal efficiency.

  Furthermore, the inventors of the present invention (5) When the filler is installed in the cooling tower and the cooling water is circulated, strong microorganisms propagate in the filler as time passes, and the cooling water is watered by these microorganisms. Found to be processed. Even under cooling water conditions that utilize the powerful oxidation action of nanobubbles, by filling the tank with the selected packing material in the water tank at the bottom of the cooling tower, microorganisms are propagated in the packing material, and the water quality of the cooling tower is increased by the microorganisms. Can be improved.

  Furthermore, the present inventors have also found that (6) microorganisms grow intensively in the filler, but the growth of microorganisms is suppressed in water and other wetted parts other than the filler.

  Therefore, in the present invention, the nanobubbles are contained in the cooling water of the cooling tower and circulated through the cooling tower, so that the wetted part of the cooling device using nanobubbles is always purified, and further, the cooling tower By adding a nanosized chemical solution to the cooling water and circulating it, the cooling tower is always maintained in a clean and controlled state by the action of chemical sterilization, etc. It becomes possible to maintain the cooling device with the same performance as when.

  In addition, in order to produce cooling water containing nanobubbles and / or nanosized chemical liquid, the nanobubble generator includes a gas-liquid mixing circulation pump having a microbubble generating section, and a gas shearing section. . Therefore, it is possible to reliably produce nanobubbles or nanosized liquid by the gas shearing part from the microbubbles or microsized liquid generated by the gas-liquid mixing circulation pump having the microbubble generating part. In addition, since the nanobubble generator has a chemical tank pump and a chemical tank and produces a nanosized chemical solution, the action of the chemical can be obtained with a small amount of chemical. Experiments have shown that a chemical action can be obtained significantly because the size of a chemical is much smaller in the case of a nanosized chemical than in a normal chemical. Therefore, an effective action such as sterilization of chemicals can be achieved with a smaller amount of chemicals than in the past. The reason is considered to be the action of the drug at the molecular level.

  Furthermore, by filling the cooling water tank provided in the lower part of the cooling tower with the string-type polyvinylidene chloride packing, microorganisms can be stably propagated in the string-type polyvinylidene chloride packing, and the cooling water can be transformed into microorganisms. It becomes possible to process. For example, even when sodium hypochlorite is added to the cooling water, microorganisms resistant to sodium hypochlorite are generated in the cooling water in a small amount. Microorganisms strong against sodium hypochlorite can be concentrated and propagated in the string-type polyvinylidene chloride filling.

  Alternatively, the cooling water tank provided in the lower part of the cooling tower is filled with the ring-type polyvinylidene chloride filler, so that the microorganisms can be stably propagated in the ring-type polyvinylidene chloride filler, and the cooling water is treated with microorganisms. It becomes possible to do.

  Alternatively, by placing a cage in a cooling water tank provided in the lower part of the cooling tower and filling the activated carbon with the activated carbon, microorganisms can be stably propagated on the activated carbon and the cooling water can be treated with microorganisms. Furthermore, it is possible to microbially decompose the organic matter adsorbed on the activated carbon by the microorganisms adsorbed on the activated carbon with the organic matter in the cooling water and then propagated on the activated carbon.

  Furthermore, by measuring the residual chlorine concentration in the cooling water with a residual chlorine concentration meter installed in the water tank at the bottom of the cooling device, and controlling the valve with the residual chlorine controller, the residual chlorine concentration is above a predetermined reference value. It is also possible to operate the nanobubble generator so as to generate nanobubbles and generate a nanosized chemical solution when the residual chlorine concentration is lower than a predetermined reference value. In this case, it becomes possible to maximize the action of the nanosized residual chlorine and to prevent unnecessary chemical addition.

  Furthermore, the TOC concentration in the cooling water is measured by a TOC meter provided in the water tank below the cooling device, and the motor rotation speed of the gas-liquid mixing and circulating pump is controlled by the TOC controller, thereby operating the gas-liquid mixing and circulating pump. It becomes possible to control. Thereby, since the operation of the gas-liquid mixing pump is not always performed but only when necessary, it is possible to save energy and reduce the running cost.

  Furthermore, by controlling the nanobubble generator with both (or either) the residual chlorine concentration and TOC concentration in the cooling water, it is possible to comprehensively manage the cooling water quality, and to accurately control the performance of the cooling tower. In addition, it is possible to operate while maintaining the details.

  Furthermore, by introducing a solution containing sodium hypochlorite, bromide salt, or a solution containing polyacrylate into the chemical tank, it prevents scale generation by sodium hypochlorite, bromide salt, or polyacrylate. It is possible to obtain the action of preventing the generation of algae and algae maximally with a smaller amount of use.

  Furthermore, ozone gas may be supplied to the nanobubble generator as an alternative to air. In this case, ozone nanobubbles are produced, ozone is maintained in the cooling water for a long time, and the bactericidal properties of ozone prevent the algae from being generated and attached to the cooling water or the louvers of the cooling tower. Can be maintained.

  In the present invention, when microbubbles are generated, bubbles (microbubbles) having a bubble diameter of 10 μm to several tens of μm are changed to “micronanobubbles” by contraction movement after generation. Micro-nano bubbles = bubbles having a diameter of about 10 μm to several hundred nm. Nanobubbles are defined as bubbles having a diameter of several hundred nm or less. This was defined by Dr. Taisei of Tokuyama Institute of Technology.

  As described above, according to the present invention, the cooling water in the cooling tower contains nanobubbles and nanosized chemicals and circulates in the cooling tower, thereby (1) improving the water quality of the cooling water and (2) relating to the cooling water. It is possible to reduce water treatment chemicals and (3) the effect of cleaning heat exchange pipes with nanobubbles and the improvement of coil thermal efficiency with nanobubble-containing cooling water. It can be realized reliably.

Below, Embodiment 1-10 of the cooling device of this invention and the cooling method using the same is demonstrated in detail, referring drawings.
(Embodiment 1)
FIG. 1 is a vertical cross-sectional configuration diagram schematically illustrating an exemplary configuration of a main part of a cooling device according to Embodiment 1 of the present invention.

  In FIG. 1, the cooling device 100 according to the first embodiment is a cooling tower having a cooling tower upper portion 10, a cooling tower intermediate portion 20, and a cooling tower lower portion 30, and nanobubbles or nanosizes in cooling water from the cooling tower. Depending on the residual chlorine concentration in the cooling water, the nanobubble generator 40 as a nanoparticle generator that contains a chemical solution and circulates in the cooling tower, and the nanobubble generator 40 generates nanobubbles or is nanosized. The residual chlorine concentration control means for controlling whether the generated chemical solution is generated, and the nanobubble generator 40 according to the TOC (total organic carbon; total organic carbon) concentration in the cooling water. And a TOC concentration control means for controlling the generation amount of the nanosized chemical solution.

  The cooling tower upper part 10 has sprinkle storage tanks 11a and 11b as upper water tanks, a perforated plate 12 provided with a large number of small holes at the bottoms of the water spray storage tanks 11a and 11b, and exhausts the internal air after heat exchange to the outside. And a fan 13 for Sprinkling storage tanks 11a and 11b are provided at the upper part of the cooling tower intermediate part 20, and are cooled as evenly as possible from the small holes of the perforated plate 12 at the bottom in order to cool a large number of heat exchange pipes 21 to be described later. Water falls and is sprinkled on the heat exchange pipe 21.

  The intermediate part 20 of the cooling tower has a large number of heat exchange pipes 21 as heat exchange parts, and cooling water splash prevention louvers 22 attached to the outside of the heat exchange pipes 21. In general, the heat exchange pipe 21 is often made of copper, and the heat exchange pipe 21 includes a liquid (heat exchange medium) to be heat exchanged, such as water having a temperature higher than the outside air temperature. Is flowing. For example, cold water from a refrigerator (not shown) is the most common. As the liquid passes through the heat exchange pipe 21, the liquid in the heat exchange pipe 21 is cooled by heat exchange with the sprinkled cooling water and the heat of vaporization by the outside air A before heat exchange. .

  The cooling tower lower part 30 has a cooling device water tank 33 in which a residual chlorine meter 31 and a TOC meter 32 are installed.

  The nano bubble generator 40 is installed outside a cooling water tank 33 as a lower water tank, and is connected to a gas / liquid mixing / circulation pump 42 having a micro bubble generating unit 41 and a gas / liquid mixing / circulation pump 42 via a pipe 61. Connected to the electrically operated valves 44 and 45 via the pipe 62, and the electrically operated valves 44 and 45 that are opened and closed in opposition to each other according to the residual chlorine concentration and the TOC concentration in the cooling water. A chemical tank pump 46 whose operation is controlled in accordance with the residual chlorine concentration and the TOC concentration, and a chemical tank 47 connected to the chemical tank pump 46 and storing various chemicals for treating cooling water as liquids have. In addition, although the thing made by Kyowa Kikai Co., Ltd. was used as the nano bubble generator 40, it is not limited to this.

  In the nanobubble generator 40, air-derived microbubbles or chemical-derived microsized chemicals are produced by a gas-liquid mixing and circulating pump 42 having a microbubble generator 41 in the first stage. In the second stage, the gas shearing part 43 produces nanobubbles or nanosized chemicals as necessary. At this time, the amount of air or the amount of the chemical solution is accurately controlled by the opening (here, opened or closed) of the electric valve 44 or the electric valve 45, and the nanobubble or the nanosized chemical solution is manufactured. When more accurate control is required, a configuration in which a rotation speed controller (inverter) of the gas-liquid mixing circulation pump 42 is additionally installed may be adopted. The gas shearing portion 43 not only shears microbubbles to obtain nanobubbles, but also shears microsized chemicals to obtain nanosize chemicals.

  The gas-liquid mixing circulation pump 42 having the microbubble generating unit 41 is a pump capable of generating microbubbles by the pump body. Conventionally, the pump unit and the microbubble generating unit are configured separately, but here, a special pump with a microbubble generating unit 41 attached is used as the gas-liquid mixing circulation pump 42.

In the chemical tank 47, for example, sodium hypochlorite, a solution in which a bromide salt is dissolved, or a solution in which a polyacrylate is dissolved is input as various chemicals for treating the cooling water. In particular, sodium hypochlorite is often selected to increase the residual chlorine concentration, but is not limited thereto.
The watering pump 49 is connected to the cooling device water tank 33 through a pipe 63a, and the gas-liquid mixing circulation pump 42 is also connected to the cooling device water tank 33 through a pipe 63b. Cooling water in the cooling device water tank 33 in the cooling tower lower part 30 is supplied to the watering pump 49 through the pipe 63a, and is transferred to the watering water storage tank 11a in the cooling tower upper part 10 through the pipe 64a by the watering pump 49 to be cooled. Cooling water is circulated between the tower upper part 10, the cooling tower intermediate part 20 and the cooling tower lower part 30. The cooling water in the cooling device water tank 33 in the cooling tower lower part 30 is supplied to the nanobubble generator 40 through the pipe 63b, contains nanobubbles or nanosized chemical solution, passes through the valve 81 and the pipe 64b. The cooling water is transferred to the water sprinkling storage tank 11 b in the cooling tower upper part 10 so that the cooling water is circulated between the cooling tower upper part 10, the cooling tower intermediate part 20 and the cooling tower lower part 30. That is, the cooling water in the cooling device water tank 33 as the lower water tank is transferred to the water storage tanks 11a and 11b as the upper water tanks through the nanobubble generator 40 and the watering pump 49, respectively, and from the water storage tanks 11a and 11b. After heat exchange via a large number of heat exchange pipes 21 as lower heat exchange parts, the heat exchanger returns to the cooling device water tank 33 as a lower water tank.

  The residual chlorine controller 51 is electrically connected to the residual chlorine meter 31 via a signal line 71, and the residual chlorine concentration in the cooling water tank 33 measured by the residual chlorine meter 31 is used as a signal. It is transmitted to the residual chlorine controller 51. According to the residual chlorine concentration of the cooling water in the cooling device water tank 33, the residual chlorine controller 51 controls the electric valve 44 to be in an open state and the electric valve 45 to be in a closed state via a signal line 72, so that air is microbubbled. The generator 41 is in a state of being supplied, or the residual chlorine regulator 51 controls the electric valve 45 to the open state and the electric valve 44 to the closed state via the signal line 72 and the chemical tank pump 46 is operated. Thus, the chemical solution is supplied to the microbubble generator 41. These residual chlorine meter 31 and residual chlorine controller 51 constitute a residual chlorine concentration control means, which generates nanobubbles or nanosizes for nanobubble generator 40 according to the residual chlorine concentration in the cooling water. It is designed to control whether the chemical solution is generated. When this chemical tank pump 46 is operated, a control signal is also output from the residual chlorine controller 51 to the gas-liquid mixing and circulation pump 42 to drive and control the rotation speed of the gas-liquid mixing and circulation pump 42. You can also.

  The TOC controller 52 is electrically connected to the TOC meter 32 via a signal line 73, and the TOC concentration of the cooling water in the cooling device water tank 33 measured by the TOC meter 32 is used as a signal. To be transmitted. According to the TOC concentration of the cooling water in the cooling device water tank 33, the motor speed controller 53 as the motor speed controller is controlled by the TOC controller 52 via the signal line 74, and the gas-liquid mixing circulation pump 42 is controlled. The motor speed is controlled. The TOC meter 32, the TOC controller 52, and the motor rotation speed controller 53 constitute a TOC concentration control means. Depending on the TOC concentration in the cooling water, the nanobubble generator 40 generates a nanobubble generation amount or The generation amount of nano-sized chemicals is controlled. Note that the TOC concentration is an organic substance concentration indicating the degree of contamination in the cooling water.

  A cooling method using the cooling device 100 according to the first embodiment with the above configuration will be described below.

  As the fan 13 installed in the cooling tower upper part 10 rotates, the outside air A before heat exchange is sucked and passes through the louver 22 from the cooling tower intermediate part 20 of the cooling device 100, and the space of the cooling tower intermediate part 20. It is introduced into the inside of the cooling tower where the heat exchange pipe 21 is disposed as a whole.

  The air passing through the inside of the cooling tower in which the heat exchange pipe 21 is installed by the fan 13 becomes the outside air B after heat exchange from the central space part of the cooling tower middle part 20 and is discharged to the upper part of the cooling device 100. .

  The liquid to be heat exchanged flows in the heat exchange pipe 21, the cooling water is vaporized by the outside air A before heat exchange, the heat exchange pipe 21 is cooled, and the liquid in the heat exchange pipe 21 is cooled. Heat exchanged and cooled.

  At this time, the generation of nanobubbles by the nanobubble generator 40 is performed by the following first step and second step.

  First, in the first step, microbubbles are formed by the microbubble generator 41. In the microbubble generator 41, gas is sucked from the negative pressure forming portion by controlling the pressure hydrodynamically with respect to the liquid inside. Since the negative pressure part is formed by high-speed fluid motion (cooling water is pumped to the micro bubble generating part by the gas-liquid mixing pump to form the negative pressure part inside), micro bubbles can be generated.

  To explain this more easily, in the first step, when the electric valve 44 is open and the electric valve 45 is closed, air is supplied from the electric valve 44 and Cooling water and air are effectively mixed and sheared (self-contained mixing and dissolution), and this is pumped to produce microbubble cloudy water. On the other hand, when the electric valve 44 is in the closed state and the electric valve 45 is in the open state, the chemical liquid is supplied from the chemical tank 47 through the electric valve 45, and the cooling water and the chemical liquid are effectively self-supplied and mixed and sheared. By being pumped, a cloudy water of a microsized chemical solution is produced.

  Next, in the second step, when air is supplied to the microbubble generator 41, the microbubbles generated by the microbubble generator 41 in the first step pass through the pipe 61 in the gas shearing unit 43. By being introduced and sheared as a fluid motion, even smaller nanobubbles can be generated from the microbubbles. On the other hand, when the chemical solution is supplied to the microbubble generating unit 41, the microsized chemical solution generated by the microbubble generating unit 41 in the first step is introduced through the pipe 61 in the gas shearing unit 43. By being sheared as a fluid motion, it is possible to generate a further nanosized chemical solution from the microsized chemical solution.

  Furthermore, when the residual chlorine concentration in the cooling water measured by the residual chlorine concentration meter 31 is equal to or higher than a predetermined reference value, the nanobubble generator 40 opens the electric valve 44 by the residual chlorine controller 51 and the electric valve 45 is Controlled to a closed state, nanobubbles are generated. Further, when the residual chlorine concentration in the cooling water measured by the residual chlorine concentration meter 31 is lower than a predetermined reference value, the residual chlorine controller 51 controls the electric valve 44 to be closed and the electric valve 45 to be opened. At the same time, the chemical tank pump 46 is operated to generate a nanosized chemical solution. Furthermore, when the TOC concentration in the cooling water measured by the TOC meter 32 is equal to or higher than a predetermined reference value, the TOC controller 52 controls the motor rotation speed of the gas-liquid mixing circulation pump 42 to be increased. Further, when the TOC concentration in the cooling water measured by the TOC meter 32 is lower than a predetermined reference value, the TOC controller 52 controls the motor rotation speed of the gas-liquid mixing circulation pump 42 to be low.

  Here, three types of bubbles will be described. Normal bubbles (bubbles) rise in the water and eventually disappear as they “bread” on the surface. Microbubbles are fine bubbles having a diameter of 10 μm to several tens of μm, and are reduced in water and eventually disappear (completely dissolved). Furthermore, nanobubbles are bubbles smaller than microbubbles, have a diameter of 100 μm to 200 nm with a diameter of 1 μm or less, and can be present in water indefinitely. Furthermore, the micro / nano bubbles are bubbles in which micro bubbles and nano bubbles are mixed.

  As described above, according to the cooling device 100 of the first embodiment, sodium hypochlorite is used as a chemical, but a small amount of nanosized sodium hypochlorite is continuously present in the cooling water. Was. In the cooling device 100 of the first embodiment, it has been found by measuring the residual chlorine concentration that sodium hypochlorite continuously remains in the cooling water. A small amount of sodium hypochlorite allows sodium hypochlorite to remain in the cooling water for a long time, improving the heat exchange performance of the cooling device 100 and facilitating maintenance operation management of the cooling device 100. Can be performed.

  When the conventional cooling tower is operated for a long time, scale and slime adhere to the heat exchange pipe 21 and the louver 22, but in the first embodiment, the scale and slime are obtained by using cooling water containing nanobubbles. Therefore, heat exchange is efficiently performed, and as a result, energy saving can be achieved.

  Furthermore, in the conventional cooling device, scale and slime are generated and adhered to portions other than the heat exchange pipe 21 and the louver 22, but in the first embodiment, nanobubbles are included in all the wetted portions. It is possible to suppress adhesion of scale and slime by using the cooling water.

  In the sprinkling storage tanks 11a and 11b in the cooling tower upper part 10, since the adhesion of scale and slime is suppressed by the cooling water containing nanobubbles, the number of maintenance such as cleaning the small holes of the porous plate 12 is extremely reduced. It becomes possible to decrease.

  Furthermore, since the cooling water containing nanobubbles is also stored in the cooling device water tank 33 and the water spray storage tanks 11a and 11b, it becomes possible to suppress the adhesion of scale and slime to the surface in the tank.

The cooling device 100 shown in FIG. 1 was manufactured as an experimental device, and an experimental device for a cooling device not provided with the nanobubble generator 40 was manufactured, and the following comparative experiment was performed. An experimental device was manufactured with a capacity of the water sprinkling storage tanks 11a and 11b of about 0.3 m ³ , a cooling tower intermediate part 20 of about 4 m ³ , and a capacity of the cooling device water tank 33 of about 1 m ^3. Trial operation was conducted with water.
After this trial operation, the amount of slime generated was compared between the experimental device of the cooling device not provided with the nanobubble generator 40 and the experimental device of the cooling device 100 of the first embodiment. The generation amount was about 20 percent (1/5) of the slime generation amount in the experimental apparatus of the cooling device in which the nanobubble generator 40 was not provided. That is, it was possible to greatly suppress the adhesion of scale and slime to the inner surface of the tank.
In addition, in the said Embodiment 1, although it comprised separately from the water sprinkling storage tank 11a and 11b, it may be integral by planar view donut shape etc.
(Embodiment 2)
FIG. 2 is a vertical cross-sectional configuration diagram schematically illustrating an exemplary configuration of a main part of a cooling device according to Embodiment 2 of the present invention. In the cooling device shown in FIG. 2, members having the same functions and effects as those of the cooling device 100 shown in FIG. Only will be described below.

  In FIG. 2, the cooling device 100 </ b> A according to the second embodiment has a sprinkler pump 49 and a pipe 64 a installed outside the cooling device water tank 33, as compared with the cooling device 100 according to the first embodiment shown in FIG. 1. In order to supply the cooling water in the cooling device water tank 33 to the left and right watering storage tanks 11a and 11b, a valve 82a, a valve 82b and a pipe 65 are added.

  In the cooling device 100A of the second embodiment, the cooling device water tank 33 is connected to the gas-liquid mixing circulation pump 42 via a pipe 63b, and the cooling water of the cooling device water tank 33 in the cooling tower lower portion 30 passes through the pipe 63b. The nanobubble or nanosized chemical solution is supplied to the nanobubble generator 40 through the cooling water, and passes through the valve 81, the pipe 64b, the valve 82a, and the pipe 65 to the water spray storage tank 11a in the upper part 10 of the cooling tower. It is possible to transfer and through the valve 81, the pipe 64b and the valve 82b to the water sprinkling storage tank 11b of the cooling tower upper part 10, the cooling tower upper part 10, the cooling tower intermediate part 20 and the cooling tower lower part 30 can be transferred. Cooling water is circulated between them.

  As described above, according to the cooling device 100A of the second embodiment, it is possible to reduce the water spray pump 49 and to circulate the cooling water together with the generation of nanobubbles by one of the gas-liquid mixing circulation pump 42, thereby reducing the initial cost. Can be reduced.

  Moreover, since it becomes possible to supply the cooling water containing nanobubbles to the left and right watering storage tanks 11a and 11b, it is possible to further enhance the effect of improving the heat exchange efficiency by containing nanobubbles in the cooling water.

Furthermore, since only one gas-liquid mixing circulation pump 42 is provided, the system can be simplified and the maintenance cost can be reduced. In addition, since the gas-liquid mixing circulation pump 42 has a high head, the above effect can be obtained by one of the gas-liquid mixing circulation pumps 42.
(Embodiment 3)
FIG. 3 is a vertical cross-sectional configuration diagram schematically illustrating an exemplary configuration of a main part of a cooling device according to Embodiment 3 of the present invention. In the cooling device shown in FIG. 3, members having the same effects as those of the cooling device 100 shown in FIG. Only will be described below.

  In FIG. 3, the cooling device 100 </ b> B of the third embodiment is different from the cooling device 100 of the first embodiment shown in FIG. 1 in that the watering pump 49 and the gas-liquid mixing and circulation pump installed outside the cooling device water tank 33. 42, a valve 82a, a valve 82b, a valve 83a, a valve 83b, a pipe 65a, and a pipe 65b are added to distribute and supply the cooling water of the cooling device water tank 33 to the left and right watering storage tanks 11a and 11b. This cooling water includes cooling water containing nanobubbles by the nanobubble generator 40 including the gas-liquid mixing circulation pump 42 and cooling water transferred by the watering pump 49 without containing nanobubbles. .

  In the cooling device 100B of the third embodiment, the cooling device water tank 33 is connected to the gas-liquid mixing and circulation pump 42 and the watering pump 49 via pipes 63a and 63b. The cooling water in the cooling device water tank 33 in the cooling tower lower part 30 is supplied to the watering pump 49 through the pipe 63a, and can be transferred to the watering water storage tank 11a in the upper cooling tower 10 through the pipe 64a and the valve 83a by the watering pump 49. In addition, the water can be transferred to the sprinkling storage tank 11b of the upper cooling tower 10 through the pipe 64a and the valve 83b, and the cooling water can be transferred between the cooling tower upper part 10, the cooling tower intermediate part 20 and the cooling tower lower part 30. Is being circulated. The cooling water in the cooling device water tank 33 in the cooling tower lower part 30 is supplied to the nanobubble generator 40 through the pipe 63b, and contains nanobubbles or nanosized chemical liquids. The valve 81, the pipe 64b, and the valve 82a are contained therein. It is possible to transfer to the sprinkling storage tank 11a of the cooling tower upper part 10 through the pipe 64b and the valve 82b, and to be transferred to the sprinkling storage tank 11b of the cooling tower upper part 10 so that the cooling tower upper part 10, the cooling tower Cooling water is circulated between the intermediate part 20 and the cooling tower lower part 30. Note that at least one of the water spray pump 49 and the gas-liquid mixing and circulation pump 42 is provided in at least one of the water spray storage tanks 11a and 11b with at least one of the valve 82a, the valve 82b, the valve 83a, and the valve 83b open. Cooling water can be supplied depending on the situation.

  As described above, according to the cooling device 100B of the third embodiment, the cooling water can be distributed and supplied to the left and right watering storage tanks 11a and 11b.

  When it is necessary to circulate a large amount of cooling water between the cooling tower upper part 10 and the cooling tower lower part 30, not only the circulating water quantity is large, but also the distribution to the left and right watering storage tanks 11a and 11b is more accurate. Can be adjusted. Scale and slime are generated in the heat exchange pipe 21 over time, and these are extremely reduced by using cooling water containing nanobubbles. In addition, the places where scales and slime are generated vary. Therefore, the performance of the cooling device 100 varies depending on which part is preferentially sprinkled with cooling water containing nanobubbles.

Therefore, according to the cooling device 100B of the third embodiment, the gas and liquid mixing circulation is performed in the left and right watering storage tanks 11a and 11b by opening and closing the valve 82a, the valve 82b, the valve 83a, and the valve 83b as time passes. Controls the location where the cooling water containing nanobubbles by the nanobubble generator 40 including the pump 42 and the cooling water transferred by the watering pump 49 without containing nanobubbles are accurately distributed and preferentially sprinkled. It is also possible to do.
(Embodiment 4)
FIG. 4 is a vertical cross-sectional configuration diagram schematically showing a configuration example of a main part of a cooling device according to Embodiment 4 of the present invention. In the cooling device shown in FIG. 4, members having the same effects as those of the cooling device 100 shown in FIG. Only described below.

  In FIG. 4, the cooling device 100 </ b> C of the fourth embodiment has a string shape as a packing for stably propagating microorganisms in the cooling device water tank 33 as compared with the cooling device 100 of the first embodiment shown in FIG. 1. A polyvinylidene chloride filling 34 is filled. In the fourth embodiment, as the string-like polyvinylidene chloride filler 34, a product manufactured by TBR Co., Ltd. is used, but is not limited thereto.

With the configuration described above, according to the cooling device 100C of the fourth embodiment, since the cooling device water tank 33 is filled with the string-like polyvinylidene chloride filling 34, the generated microorganisms are transferred to the string-like polyvinylidene chloride filling 34. It becomes possible to concentrate and breed. Although the nanobubble has a certain sterilization function, the microorganism can be stably propagated on the string-like polyvinylidene chloride filler 34 and treated with the microorganism.
(Embodiment 5)
FIG. 5 is a vertical cross-sectional configuration diagram schematically showing a configuration example of a main part of a cooling device according to Embodiment 5 of the present invention. In the cooling device shown in FIG. 5, members having the same effects as those of the cooling device 100 shown in FIG. 1 are denoted by the same reference numerals and description thereof is omitted, and only members having different effects from the first embodiment are described. This will be described below.

  In FIG. 5, the cooling device 100 </ b> D of the fifth embodiment has a ring shape as a filling for stably propagating microorganisms in the cooling device water tank 33 as compared with the cooling device 100 of the first embodiment shown in FIG. 1. A polyvinylidene chloride filling 35 is filled. In the fifth embodiment, as the ring-shaped polyvinylidene chloride filler 35, a product manufactured by TBR Co., Ltd. is used, but is not limited thereto.

With the above configuration, according to the cooling device 100D of the fifth embodiment, since the cooling device water tank 33 is filled with the ring-shaped polyvinylidene chloride filling 35, the generated microorganisms are transferred to the ring-shaped polyvinylidene chloride filling 35. It becomes possible to concentrate and breed. The nanobubbles have a sterilization function to some extent, but the microorganisms can be stably propagated in the ring-shaped polyvinylidene chloride filler 35 to be treated with the microorganisms.
(Embodiment 6)
FIG. 6 is a vertical cross-sectional configuration diagram schematically showing a configuration example of a main part of a cooling device according to Embodiment 6 of the present invention. In the cooling device shown in FIG. 6, members having the same effects as those of the cooling device 100 shown in FIG. 1 are denoted by the same reference numerals and description thereof is omitted, and only members having different effects from Embodiment 1 are described. This will be described below.

  In FIG. 6, the cooling device 100E according to the sixth embodiment is a storage basket as a filling for stably propagating microorganisms in the cooling device water tank 33 as compared with the cooling device 100 according to the first embodiment shown in FIG. 1. 36 is filled with activated carbon 37.

  With the configuration described above, according to the cooling device 100E of the sixth embodiment, since the storage basket 36 is provided in the cooling device water tank 33 and the activated carbon 37 is filled, the generated microorganisms are transferred to the activated carbon 37 in the storage basket 36. It becomes possible to concentrate and breed. Although the nanobubble has a certain sterilization function, the microorganism can be stably propagated on the activated carbon 37 in the cage 36 and the microorganism can be treated.

Furthermore, the cooling water is treated by the microorganisms propagated on the activated carbon 37, but it is also possible to physically adsorb trace organic substances in the cooling water by the physical adsorption action inherent to the activated carbon 37. The organic matter adsorbed on the activated carbon 37 is again microbially decomposed by the microorganisms propagated on the activated carbon 37. Thereby, in the so-called water purification plant in the water supply field, an effect similar to that of biological activated carbon that does not require regeneration work can be obtained.
(Embodiment 7)
FIG. 7 is a vertical cross-sectional configuration diagram schematically illustrating an exemplary configuration of a main part of a cooling device according to Embodiment 7 of the present invention. In the cooling device shown in FIG. 7, members having the same operational effects as those of the cooling device 100 shown in FIG. Only described below.

  In FIG. 7, the cooling device 100F of the seventh embodiment is different from the cooling device 100 of the first embodiment shown in FIG. 1 in that the TOC meter 32, the TOC controller 52, the motor speed controller 53, the signal line 73, and The signal line 74 has been deleted.

  In the cooling device 100F according to the seventh embodiment, the residual chlorine controller 51 is connected to the residual chlorine meter 31 via the signal line 71, and the cooling water in the cooling device water tank 33 measured by the residual chlorine meter 31 is measured. The residual chlorine concentration is transmitted to the residual chlorine controller 51 as a signal. According to the residual chlorine concentration of the cooling water in the cooling device water tank 33, the residual chlorine controller 51 controls the electric valve 44 to be in an open state and the electric valve 45 to be in a closed state via a signal line 72, so that air is microbubbled. The generator 41 is in a state of being supplied, or the residual chlorine regulator 51 controls the electric valve 45 to the open state and the electric valve 44 to the closed state via the signal line 72 and the chemical tank pump 46 is operated. In this state, the chemical solution is supplied to the microbubble generator 41.

  As described above, in the cooling device 100F of the seventh embodiment, the TOC meter 32, the TOC controller 52, the motor speed controller 53, the signal line 73, and the signal line 74 are deleted, and the residual chlorine meter 31, residual chlorine By combining the controller 51, the electric valve 44, the electric valve 45, the chemical tank pump 46, and the signal lines 71 and 72, water quality management is favorably controlled mainly based on the residual chlorine concentration in the cooling water.

  The water quality management control based on the TOC concentration in the cooling water described in the first embodiment is not indispensable, but the water quality management control based on the residual chlorine concentration in the cooling water and the water quality management control based on the TOC concentration in the cooling water are combined. More preferred.

On the other hand, only the water quality management control based on the TOC concentration in the cooling water described in the first embodiment may be used. This is shown in the ninth embodiment.
(Embodiment 8)
FIG. 8 is a vertical cross-sectional configuration diagram schematically showing a configuration example of a main part of a cooling device according to Embodiment 8 of the present invention. In the cooling device shown in FIG. 8, the same parts as those of the cooling device 100 shown in FIG. 1 are denoted by the same reference numerals, detailed description thereof is omitted, and only the parts different from the first embodiment will be described below. .

  In FIG. 8, the cooling device 100G of the eighth embodiment replaces the air taken in from the electric valve 44 with ozone gas from an ozone generator (not shown) as compared with the cooling device 100 of the first embodiment shown in FIG. It has been.

  With the configuration described above, in the cooling device 100G of the eighth embodiment, the nanobubble generator 40 generates ozone nanobubbles and nanosized chemical liquids by the following first step and second step.

  First, in the first step, when the electric valve 44 is in an open state and the electric valve 45 is in a closed state, ozone gas is supplied from the electric valve 44, and the cooling water and the ozone gas are effectively self-supplied, mixed and sheared, and are pumped. As a result, white water of ozone microbubbles is produced. On the other hand, when the electric valve 44 is in the closed state and the electric valve 45 is in the open state, the chemical is supplied as a liquid from the electric valve 45, the cooling water and the chemical liquid are effectively self-supplied and mixed and sheared, and this is pumped. Micro-sized liquid white water is produced.

  Next, in the second step, when ozone gas is supplied to the microbubble generation unit 41, the ozone microbubbles generated by the microbubble generation unit 41 in the first step pass through the pipe 61 in the gas shearing unit 43. Introduced and sheared as a fluid motion, ozone nanobubbles can be generated from ozone microbubbles. On the other hand, when a chemical as a liquid is supplied to the microbubble generating unit 41, the microsized chemical solution generated by the microbubble generating unit 41 in the first step passes through the pipe 61 in the gas shearing unit 43. The nanosized chemical solution can be generated from the microsized chemical solution by being introduced and sheared as a fluid motion.

  As described above, the cooling device 100G of the eighth embodiment contains cooling water containing ozone having strong oxidizing power as ozone nanobubbles and sodium hypochlorite having strong oxidizing power similar to ozone as a nanosized chemical solution. Since the cooling water is circulated as a cooling water, the organic matter concentration of the cooling water is high and the cooling water needs to be strongly oxidized so that the cooling water can be applied.

Whether to use ozone nanobubbles or nanosized sodium hypochlorite can be finally determined by conducting a comparative experiment with each target cooling water. Alternatively, the optimal cost may be selected by calculating the running cost and comparing it from the viewpoint of economy.
(Embodiment 9)
FIG. 9 is a vertical cross-sectional configuration diagram schematically showing a configuration example of a main part of a cooling device according to Embodiment 9 of the present invention. In the cooling device shown in FIG. 9, members having the same operational effects as those of the cooling device 100 shown in FIG. Only described below.

  9, the cooling device 100H of the ninth embodiment is different from the cooling device 100 of the first embodiment shown in FIG. 1 in that the TOC meter 32, the TOC controller 52, the motor rotation speed controller 53, the signal line 73, and The residual chlorine meter 31, the residual chlorine concentration controller 51, the signal line 71, and the signal line 72 are deleted, leaving the signal line 74.

  In Embodiment 7 described above, when the residual chlorine concentration is high by controlling whether to generate nanobubbles or to generate a nanosized chemical liquid according to the residual chlorine concentration in the cooling water, Since there is no need to increase the amount of chemicals used, the amount of chemicals used can be reduced. In Embodiments 1 to 6 and 8, in addition to controlling the residual chlorine concentration in the cooling water, in order to control the amount of nanobubbles and nanosized chemicals generated according to the TOC concentration in the cooling water, By controlling the motor speed of the gas-liquid mixing and circulating pump 42 of the gas-liquid mixing and circulating pump 40, an energy saving effect can be obtained.

  On the other hand, as in the ninth embodiment, the TOC adjustment is performed in order to control the generation amount of nanobubbles and the generation amount of the nanosized chemical liquid according to only the TOC concentration in the cooling water from the TOC meter 32. The total 52 may control the motor rotation speed of the gas-liquid mixing circulation pump 42 of the gas-liquid mixing circulation pump 40 via the motor rotation speed controller 53. In this case, electric valves 44 and 45, a chemical tank pump 46, and a chemical tank 47 are provided, and a sequence is set manually or periodically to generate nanobubbles or nanosized chemical liquids. It is good to be able to switch. Alternatively, the electric valve 45, the chemical tank pump 46, and the chemical tank 47 may be omitted, and only the electric valve 44 may be provided and connected to the microbubble generator 41 to generate only nanobubbles, or Instead of providing the electric valve 44, the electric valve 45, the chemical tank pump 46 and the chemical tank 47 are provided, and the electric valve 45 is connected to the microbubble generator 41 so that only the nanosized chemical solution is generated. It may be.

Here, the TOC concentration control means for controlling the generation amount of nanobubbles or the generation amount of nanosized chemical liquid to the nanobubble generator 40 according to the TOC concentration in the cooling water will be described. The TOC concentration of the cooling water in the cooling device water tank 33 is transmitted to the TOC controller 52 as a signal, and the TOC controller 52 determines the TOC controller 52 according to the TOC concentration of the cooling water in the cooling device water tank 33. Thus, the motor speed controller 53 as the motor speed control means is controlled via the signal line 74, so that the motor speed of the gas-liquid mixing circulation pump 42 is controlled.
(Embodiment 10)
FIG. 10: is a longitudinal cross-section block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 10 of this invention. In the cooling device shown in FIG. 10, members having the same effects as those of the cooling device 100 shown in FIG. Only described below.

  In FIG. 10, in the nanobubble generator 40 of the cooling device 100I of the ninth embodiment, in the first stage, both the microbubbles derived from air and the microsized chemicals derived from medicine have microbubble generators 41. Manufactured by a gas-liquid mixing circulation pump 42. In the second stage, nanobubbles or nanosized chemicals are produced by the gas shearing portion 43. At this time, the amount of air or the chemical solution is accurately controlled by the opening degree of the electric valve 44 and the electric valve 45 (both are opened here), and nanobubbles and nanosized chemical solution are manufactured at the same time. In short, if the amount of air taken in is MAX 0.7 liters / minute, the amount of the chemical solution can be controlled to some extent by the opening degree of the electric valve 45. The opening degree of the electric valve 44 and the electric valve 45 is adjusted stepwise (or continuously), for example, 20, 30, 40, 50, 60, 70 and 80 percent, by the residual chlorine controller 51 by the residual chlorine controller 51. It can be controlled according to the residual chlorine concentration.

  With the above configuration, the residual chlorine concentration in the cooling water tank 33 measured by the residual chlorine meter 31 is transmitted as a signal to the residual chlorine controller 51A, and the residual chlorine concentration in the cooling water tank 33 is converted to the residual chlorine concentration in the cooling water tank 33. Accordingly, the opening degree of the electric valve 44 and the electric valve 45 is controlled by the residual chlorine controller 51A via the signal line 72 (both open), and the air is supplied to the microbubble generator 41, and The electric valve 45 is opened and the electric valve 44 is controlled to be opened by the residual chlorine adjuster 51A via the signal line 72, and the chemical tank pump 46 is operated, and the chemical solution is supplied to the microbubble generator 41 together with air. It becomes a state to be. Therefore, according to the residual chlorine concentration in the cooling water, the nanobubble generator 40 can generate nanobubbles and generate a nanosized chemical solution.

  For example, as a residual chlorine concentration control means, a residual chlorine meter 31 that is installed in the lower water tank 33 and detects the residual chlorine concentration in the cooling water in the lower water tank 33, and the detection result by this residual chlorine meter is equal to or greater than a predetermined reference value. In this case, the chemical liquid tank pump 46 is operated, and the gas supply valve 44 and the chemical liquid supply valve 45 are both opened at a low opening, and the nanobubbles and the nanosized chemical liquid are supplied to the gas-liquid mixing circulation pump 42. When a low amount is generated and the detection result is lower than a predetermined reference value, the chemical tank pump 46 is operated, and both the gas supply valve 44 and the chemical supply valve 45 are opened at a high opening. It has a residual chlorine regulator 51A that generates a high amount of nanobubbles and nanosized chemicals for the gas-liquid mixing circulation pump 42.

  Here, this is a two-stage configuration of a low opening and a high opening, but it may be a three-stage configuration of a low opening, a medium opening and a high opening, or a four-stage configuration or more. An N-stage configuration (N is a natural number) may be used. In the case of an N-stage configuration, N−1 or more predetermined reference values (threshold values) are also required. Furthermore, the residual chlorine concentration control means can be configured as follows.

  For example, as a residual chlorine concentration control means, a residual chlorine meter 31 that is installed in the lower water tank 33 and detects the residual chlorine concentration in the cooling water in the lower water tank 33, and the detection result by the residual chlorine meter 31 is a predetermined reference value or more. In this case, the gas supply valve is opened and the chemical solution supply valve is closed to generate nanobubbles for the gas-liquid mixing circulation pump 42, and the detection result is lower than a predetermined reference value. Then, the chemical tank pump 46 is operated and both the gas supply valve 44 and the chemical liquid supply valve 45 are opened, and the residual chlorine control is performed to generate both nanobubbles and nanosized chemical liquid to the gas-liquid mixing circulation pump 42. 51A in total.

  In the cooling devices of Embodiments 1 to 10 described above, the nanobubble generator 40 is installed, and the nanobubbles and the nanosized chemical liquid are contained in the cooling water and are circulated through the cooling tower. A residual chlorine meter 31 and a TOC meter 32 are installed in the cooling device water tank 33, and the nanobubble generator 40 is operated by an electric valve 44, 45 and a chemical tank pump by a residual chlorine concentration controller 51 according to the residual chlorine concentration in the cooling water. 46 is controlled to generate cooling water containing nanobubbles or nanosized chemical liquid, and the motor rotation speed of the gas-liquid mixing circulation pump is controlled by the TOC controller 52 according to the TOC concentration. As a result, the water quality of the cooling water deteriorates, the efficiency of heat exchange deteriorates, microorganisms such as bacteria and amoeba grow, scales and slime are generated and adhered, and prevent corrosion even after long operation. The occurrence of various troubles related to the cooling tower, such as an increase in the amount of chemical used, can be suppressed.

  Although not particularly described in Embodiments 1 to 10, the cooling tower includes at least one of nanobubbles and nanosized chemical liquid in cooling water from a cooling tower for cooling the heat exchange medium. By having the nano-bubble generator 40 to be circulated, the water quality of cooling water deteriorates, the efficiency of heat exchange deteriorates, microorganisms such as bacteria and amoeba grow, and scales and slime even when operated for a long time It is possible to achieve the object of the present invention that suppresses various troubles related to the cooling tower, such as the generation and adhesion of the chemicals and the increase in the usage amount of the chemical for preventing corrosion.

  Moreover, in the said Embodiments 4-6, the case where the activated carbon with which the string type polyvinylidene chloride filling, the ring type polyvinylidene chloride filling, or the accommodation basket was installed in the lower water tank 33 is demonstrated. However, the present invention is not limited to this, and these may be combined. That is, in the lower water tank 33, at least one of a string-type polyvinylidene chloride filling, a ring-type polyvinylidene chloride filling, and activated carbon filled in the housing cage may be installed.

  Furthermore, in the said Embodiment 1-10, although the hypochlorous acid sodium was mainly used for the chemical | medical solution, it is not restricted to this, A bromide salt, polyacrylate, and these may be combined.

  Furthermore, in Embodiment 8 described above, ozone gas is used, but the present invention is not limited to this, and air and ozone gas may be combined.

  As mentioned above, although this invention has been illustrated using preferable Embodiment 1-10 of this invention, this invention should not be limited and limited to this Embodiment 1-10. It is understood that the scope of the present invention should be construed only by the claims. It is understood that those skilled in the art can implement an equivalent range from the description of specific preferred embodiments 1 to 10 of the present invention based on the description of the present invention and the common general technical knowledge. Patents, patent applications, and documents cited herein should be incorporated by reference in their entirety, as if the contents themselves were specifically described herein. Understood.

  The present invention relates to a cooling device in many cooling towers and the like used in each industry and a cooling method using the same, and in particular, nanobubbles and various nanosize chemicals are efficiently generated in the cooling device, and the nanobubbles are generated. And various nano-sized chemicals in the cooling water, cooling water quality improvement in the cooling tower, heat exchange efficiency improvement, energy saving promotion and cooling that can greatly reduce the amount of water treatment chemicals added to the cooling water In the field of devices and cooling methods, the cooling water in the cooling tower contains nanobubbles and nanosized chemicals and circulates in the cooling tower, thereby (1) improving the water quality of the cooling water and (2) water related to the cooling water. Reduction of processing chemicals and (3) cleaning effect of heat exchange pipes with nanobubbles and improvement of coil thermal efficiency with cooling water containing nanobubbles, It is possible to reliably achieve the energy-saving effect on the cooling tower as global warming is home project.

It is a longitudinal section lineblock diagram showing typically an example of important section composition of a cooling device concerning Embodiment 1 of the present invention. It is a longitudinal cross-sectional block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 3 of this invention. It is a longitudinal cross-section block diagram which shows typically the example of a principal part structure of the cooling device which concerns on Embodiment 4 of this invention. It is a longitudinal cross-section block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 5 of this invention. It is a longitudinal cross-section block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 6 of this invention. It is a longitudinal cross-sectional block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 7 of this invention. It is a longitudinal cross-section block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 8 of this invention. It is a longitudinal cross-sectional block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 9 of this invention. It is a longitudinal cross-section block diagram which shows typically the principal part structural example of the cooling device which concerns on Embodiment 10 of this invention.

Explanation of symbols

100, 100A, 100B, 100C, 100D, 100E, 100F, 100G, 100H, 100I Cooling device 10 Cooling device upper part 11a, 11b Sprinkling storage tank 12 Perforated plate 13 Fan 20 Cooling device intermediate part 21 Heat exchange pipe (heat exchange part)
22 Louver 30 Lower part of cooling device 31 Residual chlorine meter
32 TOC meter 33 Cooling device water tank (water tank)
34 Stringed polyvinylidene chloride filling 35 Ring-shaped polyvinylidene chloride filling 36 Cage 37 Activated carbon 40 Nano bubble generator 41 Micro bubble generating part 42 Gas-liquid mixing circulation pump 43 Gas shearing part 44, 45 Electric valve 46 Chemical tank pump ( Chemical tank pump)
47 Chemical tank (chemical tank)
49 Watering pump 51, 51A Residual chlorine controller 52 TOC controller
53 Motor speed controller
61, 62, 63a, 63b, 64a, 64b, 65, 65a, 65b Piping 71, 72, 73, 74 Signal line 81 82a, 82b, 83a, 83b Valve
A Outside air before heat exchange B Outside air after heat exchange

Claims (22)

An upper water tank for storing and spraying cooling water, a heat exchanging part provided below the upper water tank for cooling the heat exchange medium by spraying the cooling water from the upper water tank, and the heat exchanging part A cooling tower having a lower water tank that receives and stores the cooling water sprinkled and provided in the lower water tank, and a string-type polyvinylidene chloride packing, a ring-type polyvinylidene chloride packing, and a storage in the lower water tank A cooling method for cooling the heat exchange medium of a cooling device provided with at least one of activated carbon filled in a cage,
To the cooling water from the cooling tower for cooling the heat exchange medium, nano bubble generator comprises a circulating step of circulating the said cooling tower by at least one of nanobubbles and nanosized chemical,
A water treatment step of treating the cooling water with a microorganism propagated on at least one of the string-type polyvinylidene chloride filling, the ring-type polyvinylidene chloride filling, and the activated carbon filled in the containing cage And a cooling method.   In the circulation step, depending on the residual chlorine concentration in the cooling water, the residual chlorine concentration control means causes the nanobubble generator to contain the nanobubbles in the cooling water, or the cooling water is nanosized. The cooling method according to claim 1, wherein the cooling is controlled so as to contain the processed chemical solution.   In the circulation step, according to the TOC (total organic carbon) concentration in the cooling water, the TOC concentration control unit is configured to generate the nanobubbles or the nanosize to the nanobubble generator. The cooling method of Claim 1 or 2 which controls the generation amount of a chemical | medical solution. An upper water tank for storing and spraying the cooling water; a heat exchanging unit provided below the upper water tank for cooling the heat exchange medium by spraying the cooling water from the upper water tank; and the heat exchange A cooling tower having a lower water tank that receives and stores the water that has been sprinkled and provided below the unit;
By at least one of the chemical liquid nanobubbles and nanosized in the cooling water from the cooling tower for cooling the heat exchange medium and a nano bubble generator for circulating to the cooling tower,
At least one of a string-type polyvinylidene chloride filler, a ring-type polyvinylidene chloride filler, and an activated carbon filled in a container for performing water treatment of the cooling water by the propagated microorganisms in the lower aquarium Is a cooling system installed .   The residual chlorine concentration control means for controlling whether to generate the nanobubble or the nanosized chemical liquid to the nanobubble generator according to the residual chlorine concentration in the cooling water. 4. The cooling device according to 4.   The TOC concentration control means which controls the generation amount of the nanobubble or the generation amount of the nano-sized chemical liquid to the nanobubble generator according to the TOC concentration in the cooling water. The cooling device described. Cooling water in the lower water tank is transferred to the upper water tank through at least the nano bubble generator of the nano bubble generator and watering pump, and returns to the lower water tank from the upper water tank through the heat exchange unit. The cooling device according to claim 4 , wherein the cooling device is circulated as follows. The nano-bubble generator includes a gas-liquid mixing circulation pump that mixes and shears cooling water and gas supplied from the cooling tower to produce clouded water of micro bubbles, and micro bubbles supplied from the gas-liquid mixing circulation pump. The cooling device according to claim 4, further comprising a gas shearing unit that generates nanobubbles by shearing. The nano-bubble generator is supplied from the gas-liquid mixing and circulating pump, and the gas-liquid mixing and circulating pump that creates the micro-sized chemical liquid cloudy water by mixing and shearing the cooling water and the chemical liquid supplied from the cooling tower. The cooling device according to claim 4, further comprising a gas shearing unit that generates a nanosized chemical liquid by shearing the microsized chemical liquid. The nanobubble generator is a gas-liquid mixture that produces a microbubble cloudy water or / and a microsized drug solution cloudy water by mixing and shearing a gas or / and a chemical solution in the cooling water supplied from the cooling tower. A circulation pump and a gas shearing section for generating nanobubbles and / or nanosized chemical liquid by shearing microbubbles and / or microsized chemical liquid supplied from the gas-liquid mixing circulation pump. The cooling device according to any one of 4 to 7 . The nano bubble generator is cooling device according to claim 8 or 1 0 further comprising a gas supply valve which enables supplying the gas to the gas-liquid mixture circulating pump. The nanobubble generator includes a chemical tank in which a chemical for treating the cooling water is stored as a liquid, a chemical tank pump capable of sucking the chemical liquid from the chemical tank, and a chemical liquid from the chemical tank pump. the cooling device according to claim 9 or 1 0, further comprising a chemical supply valve to be supplied to the gas-liquid mixture circulating pump.   The residual chlorine concentration control means includes a residual chlorine meter for detecting a residual chlorine concentration in the cooling water, and when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value, opens the gas supply valve and supplies the chemical solution. When the detection valve is closed, nano bubbles are generated in the gas-liquid mixing circulation pump, and when the detection result is lower than a predetermined reference value, the chemical tank pump is operated to close the gas supply valve. The cooling device according to claim 5, further comprising: a residual chlorine controller configured to generate a nanosized chemical liquid with respect to the gas-liquid mixing circulation pump with the chemical liquid supply valve open.   The residual chlorine concentration control means includes a residual chlorine meter for detecting the residual chlorine concentration in the cooling water, and operates the chemical tank pump when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value, for gas supply. Both the valve and the chemical solution supply valve are opened at a low opening to generate a low amount of nanobubbles and nanosized chemical solution to the gas-liquid mixing circulation pump, and the detection result is lower than a predetermined reference value. When it is low, the chemical solution tank pump is operated, and both the gas supply valve and the chemical solution supply valve are opened at a high degree of opening, and the nanobubbles and the nanosized chemical solution are increased with respect to the gas-liquid mixing circulation pump. The cooling device according to claim 5, further comprising a residual chlorine controller for generating a quantity.   The residual chlorine concentration control means includes: a residual chlorine meter that detects a residual chlorine concentration in the cooling water; and a gas supply valve is opened when the detection result by the residual chlorine meter is equal to or greater than a predetermined reference value; When the supply valve is closed, nano bubbles are generated in the gas-liquid mixing circulation pump, and when the detection result is lower than a predetermined reference value, the chemical tank pump is operated, and the gas supply valve and The cooling device according to claim 5, further comprising: a residual chlorine controller that opens both the chemical solution supply valves and generates both nanobubbles and nanosized chemical solution to the gas-liquid mixing circulation pump. The residual chlorine meter, cooling device according to any of claims 1 3 to 1 5 wherein is installed in a lower water tank or the upper water tank for detecting the residual chlorine concentration in the cooling water in the water tank.   The TOC concentration control means includes a TOC meter for detecting the TOC concentration in the cooling water, and a motor of the gas-liquid mixing circulation pump via the motor rotation speed control means when the detection result by the TOC meter is equal to or greater than a predetermined reference value. TOC for controlling the rotational speed to be increased, and controlling the motor rotational speed of the gas-liquid mixing circulation pump to be lowered via the motor rotational speed control means when the detection result is lower than a predetermined reference value. The cooling device according to claim 6, further comprising a controller. The cooling device according to claim 17 , wherein the TOC meter is installed in the lower water tank or the upper water tank to detect a TOC concentration in the cooling water in the water tank. The chemical solution, sodium hypochlorite, claim 4-6 is a solution prepared by dissolving at least one of bromide salts and polyacrylates, 9, 1 0 and 1 2-1 6 according to any one Cooling system. The gas cooling device according to claim 8, 1 0 and 1 1 at least one of air and ozone. The upper water tank has a sprinkling storage tank and a perforated plate provided with a large number of small holes at the bottom of the sprinkling storage tank, and the heat exchanging part is sprinkled from the small holes of the perforated plate, The cooling device according to claim 4 , wherein the cooling device comprises a plurality of heat exchange pipes flowing inside. Cooling water splash prevention louvers attached so as to surround the outer peripheral portions of the multiple heat exchange pipes, and the internal air after heat exchange that has passed through the multiple heat exchange pipes from the cooling water splash prevention louvers. the cooling device according to claim 2 1, and a fan for exhausting to the outside.

Images