JP2007069124A - Water treatment equipment - Google Patents

Abstract

[Objective] To provide a water treatment apparatus capable of reliably decomposing organic substances in water in a water storage tank, suppressing the generation of malodor due to water contamination, and suppressing the growth of moss and algae.
[Configuration] A water storage tank such as a fish breeding tank 1, an auxiliary tank 2 in which water is circulated between the water storage tank via a suction pipe 3 and a return pipe 4, and photocatalytic particles disposed in the auxiliary tank 2 7 and an excitation light source such as an ultraviolet lamp 8 for irradiating the photocatalytic particles 7 with excitation light. The water sucked into the auxiliary tank 2 from the water storage tank through the suction pipe 3 is purified by the photocatalytic particles 7 irradiated with the excitation light in the auxiliary tank 2, and the purified water is purified from the auxiliary tank 2 through the return pipe 4. To return to the water tank and purify the water in the water tank.
[Selection] Figure 1

Description

  The present invention relates to a water treatment apparatus for purifying water in a water storage tank such as a fish breeding tank or a cooling tower water tank.

  Conventionally, the water in the fish breeding tank is contaminated with urine and feces discharged from the fish, and the bait that the fish has left uneaten rots, causing bacteria to propagate and become contaminated. For this reason, in order to raise fish, the water in the fish breeding tank must be replaced regularly or the fish breeding tank must be washed. In addition, bacteria have been generated that favor the food left over by fish, and it has been necessary to remove these bacteria. These operations are time consuming and labor intensive.

  Further, in the conventional heat pump type hot water heater, hot water whose temperature has been increased by the water heat exchanger of the heat pump is sent into the tank, and the hot water which is the secondary water heat-exchanged by the heat exchanging portion in the tank is indoors. Hot water is supplied. Further, the secondary water is returned to the tank, and heat is exchanged in the heat exchange section in the tank. However, there is a risk of mold and germs in the hot water for heat exchange in the tank circulated to the water heat exchanger of the heat pump, so it is necessary to replace the hot water in this tank or clean the tank, These tasks were difficult.

  In addition, bacteria, molds, and microorganisms are likely to be generated in the water in the conventional cooling tower water tank, and clogging of the pump and the delivery pipe occurs. Furthermore, there is a possibility that bacteria, molds and microorganisms may be scattered around by the blower installed in the cooling tower. For this reason, it is necessary to periodically clean the cooling tower, which is troublesome. In particular, when amoeba and algae grow in a cooling tower water tank or the like, there is a possibility that Legionella bacteria grow in association with these amoebae and algae. Furthermore, during the cooling tower operation stop period, in order not to amplify the contamination of the water, it was necessary to remove all water from the water tank and the piping system so as not to remain.

  As a conventional technique for purifying the water of the cooling tower described above, for example, there is a cooling tower described in Japanese Patent Application Laid-Open No. 5-45090 (Patent Document 1). FIG. 12 shows a conventional cooling tower, (12A) is a longitudinal sectional view, and (12B) is a plan view. (12A) As shown in (12B), in this cooling tower 101, the antibacterial / rust preventive agent is installed in a water storage tank, a water pipe, or the like. This antibacterial / rust preventive agent uses metal ions such as silver, copper and zinc as an antibacterial agent. A carrier such as calcium carbonate, calcium phosphate, or ceramic material that adsorbs and supports these metal ions is used as a carrier, and zinc oxide whisker having a three-dimensional structure of a single crystal tetrapot is blended. By introducing this antibacterial / rust preventive agent from the upper water tank 103, generation and growth of algae and microorganisms in the cooling tower 101 are suppressed, and at the same time, generation of rust is suppressed. In the figure, reference numeral 104 denotes a water supply hole.

Moreover, as a water treatment agent for a water tank or the like, for example, there is one described in JP-A-9-38668 (Patent Document 2). This water treatment agent is obtained by forming a coating film containing titanium dioxide having a photocatalytic reaction function and zeolite having antibacterial properties on the surface of a granular material having a specific gravity smaller than that of water. Titanium dioxide having a photocatalytic reaction function improves the quality of water to be treated by decomposing fouling components (organic substances) floating or dissolved in water in the water tank. Zeolite having antibacterial properties exhibits antibacterial effects on algae and the like.
Japanese Patent Laid-Open No. 5-45090 JP-A-9-38668

  However, the conventional cooling tower described above has a problem that it is expensive because metal ions such as silver, copper, and zinc are used. Furthermore, since the cooling tower is metallic, there is a problem that the surface of the cooling tower becomes rough due to corrosion or precipitation due to a chemical reaction with metal ions. Moreover, the compounding structure of the antibacterial / rust preventive agent is complicated, and there is a problem that its production is difficult. Furthermore, there is a problem that the performance of adsorbing and decomposing organic substances in the water in the cooling tower is poor.

  Moreover, since the above-mentioned conventional water treatment agent floats in water, the water on the bottom side of the water tank cannot be subjected to purification treatment, and there is a problem that the purification treatment action is insufficient. In addition, since the water treatment agent floats in the water, there is a problem that the contact area with water is reduced and the purification efficiency is low.

  The present invention has been made in view of the above-described conventional problems, and can reliably decompose organic matter in the water in the water storage tank, can suppress the generation of malodor due to water contamination, and can suppress the growth of moss and algae. It aims at providing the water treatment apparatus which can fully demonstrate.

  This invention is proposed in order to solve the said subject, Comprising: The 1st form of this invention attracts | sucks the water of the water storage tank which stored water, and the said water of the said water storage tank via a suction pipe And an auxiliary tank for returning the water to the water storage tank via a return pipe, and a photocatalytic particle having a photocatalytic layer formed on the surface of porous particles or nonporous particles disposed in the water in the auxiliary tank. And at least a sunlight introduction means for irradiating the photocatalytic particles with excitation light and / or an excitation light source, and the excitation light is supplied to the auxiliary tank through the suction pipe. The water treatment device purifies the irradiated water by the photocatalytic particles and returns the purified water from the auxiliary tank to the water storage tank via the return pipe to purify the water in the water storage tank.

  The 2nd form of this invention is a water treatment apparatus with which the water of the said water storage tank is circulated to an external system via a delivery pipe and a delivery pipe in the 1st form.

  According to a third aspect of the present invention, in the first aspect, a heat exchanging unit is provided in the water storage tank, and secondary water is sent from the heat exchanging unit to an external system through an outlet pipe, and the external system From the above, the secondary water is fed into the heat exchange section in the water storage tank through an inlet pipe.

  According to a fourth aspect of the present invention, in the first aspect, the water tank is a fish breeding tank, and water purified in the auxiliary tank is returned to the fish breeding tank via the return pipe. This is a water treatment device for purifying the water in the breeding tank.

  According to a fifth aspect of the present invention, in the first aspect, the water storage tank is a bathtub, and the water purified in the auxiliary tank is returned to the bathtub through the return pipe to purify the water in the bathtub. A water treatment device to be treated.

  According to a sixth aspect of the present invention, in the second aspect, the water tank is a water tank of a cooling tower for circulating cold water, and the external system is a cooling means for cooling by circulation of the cold water It is a processing device.

  According to a seventh aspect of the present invention, in the third aspect, the water storage tank is a hot water tank in which hot water heated to a high temperature by a hydrothermal exchanger of a heat pump is stored in a circulating state, and the external system is the hot water It is a water treatment apparatus which is a hot water supply means for supplying the secondary water heated by the heat exchange unit in the tank.

  In an eighth aspect of the present invention, photocatalytic particles having a photocatalytic layer formed on the surface of porous particles or nonporous particles are disposed in water in a water tank comprising a fish breeding tank in which water is stored. It is a water treatment device.

  According to a ninth aspect of the present invention, in the eighth aspect, a circulation tank having a circulation pump is disposed in the water storage tank, the photocatalytic particles are disposed in water in the circulation tank, and the photocatalytic property is provided. Sunlight introducing means for irradiating particles with excitation light and / or an excitation light source is disposed, and water purified by the photocatalytic particles irradiated with the excitation light is driven from the circulation tank by driving the circulation pump. A water treatment device configured to circulate in a tank.

  According to the first aspect of the present invention, the photocatalytic particles arranged in the water in the auxiliary tank have a photocatalytic layer formed on the surface of the porous particles or non-porous particles, and the suction pipe is connected to the water storage tank. The water sucked through is purified by the photocatalytic layer of photocatalytic particles in this auxiliary tank. The water purified in the auxiliary tank is returned from the auxiliary tank to the reservoir through the return pipe, so that the water in the reservoir is gradually purified. When the photocatalytic particles in the auxiliary tank are irradiated with the excitation light from the sunlight introducing means or / and the excitation light source, the organic matter in the water is photolyzed to purify the water. Examples of the photocatalyst layer include a visible light responsive photocatalyst layer, a dispersion of rutile titanium dioxide fine particles carrying ultrafine metal particles, and an anatase titanium dioxide. Examples of the porous particles include porous ceramics, activated carbon, silica gel, zeolite, porous glass, glass beads, lightweight aggregate particles, ceramic beads, molecular sieves, and the like. The photocatalytic particles in which the photocatalytic layer is formed on the surface of the porous particles are such that organic matter in the water in the auxiliary tank is adsorbed on the pores of the porous particles and the surface of the photocatalytic layer, and the photocatalytic layer receives excitation light. The adsorbed organic matter can be effectively decomposed and purified.

  Nonporous particles include metallic and nonmetallic particles. The photocatalyst layer on the surface of the non-porous particles forms a large number of concave and convex portions, so that organic substances in water are efficiently adsorbed in the concave parts, and the adsorbed organic substances are effectively decomposed to purify the water in the auxiliary tank. can do. Furthermore, by forming a photocatalyst layer on the surface of porous particles or non-porous particles by a sol-gel method, the photocatalyst layer is cracked to form innumerable pores. The organic matter in the water in the auxiliary tank is adsorbed in the countless holes, and the adsorbed organic substance can be decomposed by the photocatalyst layer to efficiently purify the water in the auxiliary tank. Further, the porous particles or non-porous particles are formed of a material having a specific gravity greater than that of water so as to be immersed in water. Therefore, since the photocatalytic particles are submerged in water in the auxiliary tank, the contact area with water is increased, and the decomposition efficiency of organic substances in water can be improved. Moreover, since the photocatalytic particles are agitated in the water in the auxiliary tank, the contact efficiency with water can be further improved, and the decomposition efficiency of organic substances in water can be further improved. The sunlight introducing means includes a transparent member such as a transparent plate and an optical fiber, and the excitation light source includes an ultraviolet lamp and a light source that emits visible light. It is also possible to connect the suction pipe and the return pipe in the middle of the pipe extending from the water storage tank to circulate so that the water circulates between the water storage tank and the auxiliary water tank. In addition, an auxiliary tank is placed in the middle of the pipe that extends from the water tank and circulates, and the pipe that extends from the water tank to the outside and is connected to the auxiliary tank also serves as a suction pipe. It is also possible to use a pipe extending to the tank also as a return pipe. Moreover, the suction pipe and the return pipe may be detachably attached with one touch.

  According to the second aspect of the present invention, the water in the water storage tank purified by the photocatalytic particles in the auxiliary tank is sent to the external system through the delivery pipe, so that the water in the external system is always purified. Can be saved in state. Furthermore, since the water in the reservoir is circulated to the external system via the delivery pipe and the delivery pipe, the external system water can always be stored cleanly, and the external piping system can have a long life. Examples of the water sent to the external system include cooling water that cools a room or the like.

  According to the third aspect of the present invention, if the water in the water storage tank is warm water, the warm water is sucked into the auxiliary tank by the suction pipe from the water storage tank, and purified by the photocatalytic particles in the auxiliary tank, The purified hot water is returned to the water storage tank through a return pipe and purified. The secondary water in the heat exchange section is heat-exchanged by the purified hot water to become secondary hot water, and this heat exchange can be performed efficiently. In addition, secondary hot water is sent from the heat exchange section to the external system via the outlet pipe. In this external system, a closed system in which the secondary hot water circulates and an open system in which the secondary hot water is discharged without being circulated. There are things. Examples of the external system that is open include those that discharge shower water, washing water, and drinking water. As an external system having a closed system, for example, there is a system that warms a room or the like with secondary hot water passing through a pipe. Moreover, since the warm water in the water tank and the secondary warm water sent out from the heat exchanger through the outlet pipe are not mixed, there is an advantage that fresh secondary warm water can be always supplied to the external system.

According to the fourth aspect of the present invention, the water in the water tank composed of a fish breeding tank is sent to the auxiliary tank through the suction pipe, and the water is purified by the photocatalytic particles in the auxiliary tank and the return pipe. It is returned to the fish breeding tank through the water to purify the water in the fish breeding tank.
Accordingly, it is possible to purify the water contaminated with the urine and feces of the fish in the fish breeding layer and bacteria that favors the uneaten food. Moreover, while suppressing the generation | occurrence | production of the bad odor which generate | occur | produces in a fish breeding tank, the suppression effect of moss, algae, etc. is exhibited. Moreover, since the water in the fish breeding tank is purified, it is not necessary to clean the fish breeding tank, and the maintenance can be made free.

  According to the fifth aspect of the present invention, the water in the water tank composed of the bathtub is sent to the auxiliary tank via the suction pipe, and the water is purified by the photocatalytic particles in the auxiliary tank and then passed through the return pipe. The water in the bathtub can be purified by returning to the bathtub. Therefore, since the water in the bathtub is always kept clean, the number of replacements of the water in the bathtub can be reduced. Moreover, since the purified water is always present in the bathtub, it is possible to prevent the inner wall of the bathtub from becoming dirty.

  According to the sixth aspect of the present invention, water (cooling water) in a water storage tank composed of a cooling tower water tank is sent to the auxiliary tank via the suction pipe, and the water is purified by photocatalytic particles in the auxiliary tank. The Furthermore, the water in the water tank can be purified by returning to the water tank of the cooling tower via the return pipe. Therefore, it is possible to prevent and suppress or kill the bacteria, molds, and microorganisms that are generated in the water of the cooling tower water tank. It can also prevent clogging of the pump for circulating the water (cooling water) in the water tank, the sending pipe and the feeding pipe, and prevent the scale from accumulating. Circulation can be performed smoothly. Further, the cooling means as an external system includes a cooling pipe, fins, and the like, so that the cooling pipe can be prevented from being clogged. Furthermore, even if water is sprinkled by the blower in the cooling tower, the generation of fungi, molds and microorganisms in the water is suppressed, so there is no possibility that these fungi, molds and microorganisms will be scattered around. And since the water of the water tank of a cooling tower is purified, the proliferation of Legionella bacteria can be suppressed. Moreover, the water in the water tank of the cooling tower is purified, so that there is an advantage that the installation place of the cooling tower is not limited and can be installed in a desired place.

According to the seventh aspect of the present invention, the heat pump transfers atmospheric heat to a medium gas such as carbon dioxide (CO ₂ ), compresses it to a high temperature, and circulates it from the hot water tank via the water heat exchanger. Heat is exchanged to warm water. Further, the secondary water is subjected to heat exchange in the hot water tank and supplied to the room as secondary hot water. Since the warm water in the warm water tank is sealed water circulated through the delivery pipe, it is necessary to prevent the generation of mold and fungi. According to the present embodiment, the hot water in the hot water tank is sucked into the auxiliary tank through the suction pipe, is purified by the photocatalytic particles in the auxiliary tank, and is returned to the hot water tank as the water storage tank through the return pipe. The hot water inside is purified. Therefore, generation | occurrence | production of mold | fungi and bacteria in the warm water tank which is a water storage tank can be prevented. Since mold and fungi do not adhere to the heat exchange section in the hot water tank, heat exchange to the secondary water can be performed smoothly at the heat exchange section, and hot water is supplied to the heat-exchanged secondary hot water. It can be supplied without hindrance to the means. Moreover, since the hot water in the hot water tank is purified, cleaning of the hot water tank can be reduced, and there is an advantage that maintenance-free operation can be achieved. In addition, there exist a shower, a faucet, etc. as warm water supply means, and this warm water is used as washing water, drinking water, etc.

  According to the eighth aspect of the present invention, the photocatalytic particles in which the photocatalytic layer is formed on the surface of the porous particles or the nonporous particles are disposed in the water of the water tank composed of a fish breeding tank. The water in the fish breeding tank is purified by irradiating the photocatalytic particles with excitation light. That is, the organic substances in the water in the fish breeding tank are decomposed by the photocatalytic particles to purify the water in the fish breeding tank. The urine and feces excreted from the fish in the fish breeding tank and the bacteria caused by the decay of uneaten food are purified by the photocatalytic particles. As a result, generation of moss and algae can be suppressed. Furthermore, it is possible to suppress the growth of bacteria that favor the food left over. Accordingly, it is possible to reduce the water change and the water tank washing of the fish breeding tank, and it is possible to make it maintenance-free. Further, since the photocatalytic particles are submerged in water, the contact area with water is large, the contact efficiency with water is improved, and the decomposition efficiency of organic matter can be increased.

  According to the ninth aspect of the present invention, the water in the fish breeding tank can be circulated by driving the circulation pump of the circulation tank, and the water in the fish breeding tank is left by the photocatalytic particles in the circulation tank. It can be purified without any problems. Since the photocatalytic particles are irradiated with the excitation light from the sunlight introduction means and / or the excitation light source, organic substances in water can be efficiently decomposed with the photocatalytic particles. The sunlight introducing means includes a transparent member such as a transparent plate and an optical fiber, and the excitation light source includes an ultraviolet lamp and a light source that generates visible light.

Hereinafter, an embodiment of a water treatment apparatus according to the present invention will be described in detail with reference to FIGS.
FIG. 1 is an external view in which the water treatment apparatus according to the first embodiment of the present invention is applied to a fish breeding tank. As shown in FIG. 1, the water treatment apparatus of the first embodiment has a fish breeding tank 1 and an auxiliary tank 2, and this auxiliary tank 2 is installed on the side of the fish breeding tank 1. A suction pipe 3 and a return pipe 4 are disposed between 2 and the fish breeding tank 1. The tip of the suction pipe 3 is arranged near the bottom of the fish breeding tank 2, and the tip of the return pipe 4 is arranged near the water surface of the fish breeding tank 1. The suction pipe 3 is provided with a circulation pump 5 and an activated carbon filter 6 for filtration. A large number of substantially spherical photocatalytic particles 7 are arranged at the bottom of the auxiliary tank 2, and the photocatalytic particles 7 are formed by forming a photocatalytic layer on the surface of porous particles or nonporous particles. In addition, an ultraviolet lamp 8 is disposed on the auxiliary tank 2, and the ultraviolet light that is excitation light is irradiated from the ultraviolet lamp 8 to the photocatalytic particles 7. In the figure, reference numeral 9 denotes a pipe for draining sewage, and the sludge sewage settled in the auxiliary tank 2 is drained by opening the stopper 9a. Reference numeral 10 denotes an air pump disposed in the fish breeding tank 1 and supplies air into the water of the fish breeding tank 1.

  When the circulation pump 5 is driven, the water in the fish breeding tank 1 is sucked from the tip of the suction pipe 3, and the water filtered by the activated carbon filter 6 is sent into the auxiliary tank 2. Water is purified by the photocatalytic action of the many photocatalytic particles 7 at the bottom of the auxiliary tank 2 by the ultraviolet rays irradiated from the ultraviolet lamp 8. That is, organic substances in water are decomposed and purified by the photocatalytic particles 7. The water purified in the auxiliary tank 2 is returned to the fish breeding tank 1 through the return pipe 4, and the water in the fish breeding tank 1 is purified by circulation of the purified water. In this way, the water in the fish breeding tank 1 is purified, whereby the organic matter in the water in the fish breeding tank 1 is decomposed. Further, fish dung, urine and bait residues that could not be purified are extracted from the bottom of the auxiliary tank 2 to the outside as sludge sewage by the sewage drain pipe 9 and processed.

  This water treatment apparatus is provided with an auxiliary tank 2 for disassembling water in consideration of the influence on the fish in the fish breeding tank 1 outside the fish breeding tank 1 and sucking the sewage in the fish breeding tank 1 into the suction pipe The pump is pumped up at 3 and purified in the auxiliary tank 2. With such a configuration, there is an advantage that even if an ultraviolet lamp that emits strong ultraviolet rays is used as the ultraviolet lamp 8, fish are not affected. Since the water is sucked from the fish breeding tank 1 to the auxiliary tank 2 and purified in the auxiliary tank 2 by driving the circulation pump 5, the water is returned from the auxiliary tank 2 to the fish breeding tank 1. Is preferably sealed. Moreover, since the ultraviolet lamp 8 emits strong ultraviolet rays, it is preferable to provide a hood so that the ultraviolet rays do not enter the eyes.

  FIG. 2 is an external view in which the water treatment apparatus of the second embodiment is applied to a fish breeding tank. As shown in FIG. 2, in the water treatment apparatus of the second embodiment, the auxiliary tank 2 is installed on the upper part of the fish breeding tank 1, and the circulation pump 5 is arranged near the bottom of the fish breeding tank 1 in the water. A suction pipe 3 is arranged from the pump 5 to the auxiliary tank 2. The suction pipe 3 is provided with a filtration activated carbon filter 6 for filtering water sucked from the fish breeding tank 1. A return pipe 4 is disposed from the auxiliary tank 2 to the fish breeding tank 1. A large number of photocatalytic particles 7 are disposed at the bottom of the auxiliary tank 2, and an ultraviolet lamp 8 is disposed in the vicinity of the back side of the auxiliary tank 2, and the ultraviolet light emitted from the ultraviolet lamp 8 is irradiated into the auxiliary tank 2 by the photocatalytic particles 7. The water is purified. This ultraviolet lamp 8 also serves as illumination of the fish breeding tank 1. In addition, a sewage drainage pipe 9 is provided at the bottom of the auxiliary tank 2, and sludge sewage that has not been purified in the auxiliary tank 2 is discharged through the sewage drainage pipe 9 for processing.

  When the circulation pump 5 is driven, water is sucked from the fish breeding tank 1, and this water is filtered through the activated carbon filter 6 for filtration while passing through the suction pipe 3 and then sent out into the auxiliary tank 2. The water sent into the auxiliary tank 2 is purified by decomposing organic matter by the photodecomposition action by the many photocatalytic particles 7 irradiated with the ultraviolet rays from the ultraviolet lamp 8. The water purified in the auxiliary tank 2 is returned to the fish breeding tank 1 through the return pipe 4 and circulated. The water in the fish breeding tank 1 is gradually purified by this circulated water.

  FIG. 3 is a cross-sectional view in which the water treatment apparatus of the third embodiment is applied to a bathtub. As shown in FIG. 3, the water treatment device of the third embodiment includes a bathtub 11 and an auxiliary tank 2, and the auxiliary tank 2 is disposed on the side of the bathtub 11. A suction pipe 3 is arranged from the vicinity of the bottom of the bathtub 11 to the auxiliary tank 2, a return pipe 4 is arranged from the auxiliary tank 2 to the bathtub 11, and a circulation pump 5 is provided in the suction pipe 3. Photocatalytic particles 12 formed in a plate shape are disposed in the auxiliary tank 2, and an ultraviolet lamp 8 is disposed on the auxiliary tank 2. By driving the circulation pump 5, the water in the bathtub 11 is sucked into the suction pipe 3 and sent out into the auxiliary tank 2. Water is purified by decomposing organic substances in the water in the auxiliary tank 2 by the photodecomposing action of the photocatalyst particles 12 by the ultraviolet rays emitted from the ultraviolet lamp 8. The purified water is returned from the auxiliary tank 2 to the bathtub 11 through the return pipe 4, and the water in the bathtub 11 is circulated between the auxiliary tank 2 and the water in the bathtub 11 is returned. Purified. Note that a large number of substantially spherical photocatalytic particles 7 may be arranged at the bottom of the auxiliary tank 2 in place of the plate-like photocatalytic particles 12.

  FIG. 4 is a cross-sectional view in which the water treatment device of the fourth embodiment is applied to a bathtub. As shown in FIG. 4, the water treatment apparatus of the fourth embodiment uses a cylindrical auxiliary tank 13, and an ultraviolet lamp 14 is disposed so as to penetrate the cylindrical auxiliary tank 13 up and down. The auxiliary tank 13 is filled with a number of photocatalytic particles (not shown). A suction pipe 3 is arranged from the vicinity of the bottom of the bathtub 11 to the cylindrical auxiliary tank 13, and a return pipe 5 is installed from the cylindrical auxiliary tank 13 to the bathtub 11, and the suction pipe 3 is provided with a circulation pump 5. ing. By driving the circulation pump 5, the water in the bathtub 11 is sucked into the suction pipe 3 and sent out into the cylindrical auxiliary tank 13. Water is purified by decomposing organic substances in the water in the cylindrical auxiliary tank 13 by the photolytic action of photocatalytic particles (not shown) by ultraviolet rays emitted from the ultraviolet lamp 14. The purified water is returned from the cylindrical auxiliary tank 13 into the bathtub 11 through the return pipe 4, and the water in the bathtub 11 is further circulated between the cylindrical auxiliary tank 13 and the bathtub. The water in 11 is purified. When the cylindrical auxiliary tank 13 is made of a transparent case such as a glass case, the photocatalytic particles in the cylindrical auxiliary tank 13 are irradiated with sunlight to decompose organic substances in water, You may make it purify water.

  FIG. 5 is a schematic diagram in which the water treatment apparatus of the fifth embodiment is applied to a cooling tower. As shown in FIG. 5, the water treatment apparatus of the fifth embodiment includes a water tank 16 and an auxiliary tank 2 of a cooling tower 15, and the auxiliary tank 2 is disposed on the side of the water tank 16. A delivery pipe 18 is provided from the water tank 16 of the cooling tower 15 toward the room of the building 17. The delivery pipe 18 is provided with a pump 19 and a cooling pipe 20. By driving the pump 19, cold water in the water tank 16 is delivered from the delivery pipe 18 to the cooling pipe 20. It is comprised so that the room | chamber interior may be cooled. The water returned from the cooling pipe 20 to the cooling tower 15 through the feeding pipe 21 is cooled in the cooling tower 15 and is fed into the water tank 16 as cold water. Further, the suction pipe 3 is disposed from the circulation pump 5 disposed in the water tank 16 to the auxiliary tank 2, and the return pipe 4 is disposed from the auxiliary tank 2 to the water tank 16. Plate-like photocatalytic particles 12 are arranged in the auxiliary tank 2, and further, sunlight introducing means made of a transparent plate 22 such as glass is placed on the upper end of the auxiliary tank 2.

  The cold water in the water tank 16 is sucked into the auxiliary tank 2 from the water tank 16 by the drive of the circulation pump 5 and purified by the plate-like photocatalytic particles 12 in the auxiliary tank 2. That is, sunlight from the sun T passes through the transparent plate 22 and is irradiated onto the plate-like photocatalytic particles 12 to decompose the organic matter in the water in the auxiliary tank 2 to purify the cold water. The cold water purified in the auxiliary tank 2 is returned to the water tank 16 via the return pipe 4 and further circulated between the auxiliary tank 2 to purify the cold water in the water tank 16.

  FIG. 6 is a schematic diagram in which the water treatment apparatus of the sixth embodiment is applied to a cooling tower. In addition, the same member and the same location as 5th Embodiment are attached | subjected the same code | symbol, and the description is abbreviate | omitted. As shown in FIG. 6, an ultraviolet lamp 8 is disposed on the auxiliary tank 2, and ultraviolet rays are irradiated from the ultraviolet lamp 8 to the plate-like photocatalytic particles 12 in the auxiliary tank 2, and this plate-like photocatalytic property. The organic substance in the cold water in the auxiliary tank 2 is decomposed by the photolytic action of the particles 12 so that the cold water is purified. The purified cold water is returned to the water tank 16, and the cold water in the water tank 16 is circulated between the auxiliary tank 2 and the cold water in the water tank 16 is purified.

  FIG. 7 is a schematic view in which the water treatment apparatus of the seventh embodiment is applied to a cooling tower. In addition, the same member and the same location as 5th Embodiment are attached | subjected the same code | symbol, and the description is abbreviate | omitted. As shown in FIG. 7, the water treatment apparatus of the seventh embodiment uses a cylindrical auxiliary tank 13, and an ultraviolet lamp 14 is disposed so as to penetrate the cylindrical auxiliary tank 13 up and down. The auxiliary tank 13 is filled with a number of photocatalytic particles (not shown). The suction pipe 3 is arranged from the water tank 16 of the cooling tower 15 to the cylindrical auxiliary tank 13, and the return pipe 5 is installed from the cylindrical auxiliary tank 13 to the water tank 16, and in the water tank 16 at the proximal end of the suction pipe 3. A circulation pump 5 is provided.

  By driving the circulation pump 5, the cold water in the water tank 16 is sucked into the suction pipe 3 and sent to the cylindrical auxiliary tank 13. Cold water is purified by decomposing organic matter in the water in the cylindrical auxiliary tank 13 by the photolysis action of photocatalytic particles (not shown) by ultraviolet rays emitted from the ultraviolet lamp 14. The purified cold water is returned from the cylindrical auxiliary tank 13 to the water tank 16 through the return pipe 5, and the cold water in the water tank 16 is circulated between the cylindrical auxiliary tank 13 and the water tank. The cold water in 16 is purified. When the cylindrical auxiliary tank 13 is made of a transparent case such as a glass case, the photocatalytic particles in the cylindrical auxiliary tank 13 are irradiated with sunlight to decompose organic substances in water, You may make it purify water.

  FIG. 8 is a piping system diagram in which the water treatment apparatus according to the eighth embodiment is applied to a heat pump type hot water heater. As shown in FIG. 8, the heat pump type hot water heater 23 has an air heat exchanger 24 disposed at the tip on the heat pump unit side, and is connected to the compressor 26 through the first pipe 25 from the air heat exchanger 24. Yes. The compressor 26 is connected to a water heat exchanger 28 via a second pipe 27, and the water heat exchanger 28 is connected to an expansion valve 30 via a third pipe 29. The expansion valve 30 is connected to the air heat exchanger 24 via the fourth pipe 31. A hot water tank 32 on the hot water storage unit side is installed on the side of the water heat exchanger 28 on the heat pump unit side, and a water inlet pipe 34 is disposed from the hot water tank 32 into the water heat exchanger 28 via a pump 33. Yes. The water inlet pipe 34 is communicated with the hot water outlet pipe 35 in the water heat exchanger 28, the hot water outlet pipe 35 is connected to the hot water tank 32, and the hot water heat-exchanged in the water heat exchanger 28 is passed through the hot water outlet pipe 35. It is configured to be introduced into the hot water tank 32. In the hot water tank 32, a heat exchanging portion 36 composed of a meandering pipe for exchanging heat with hot water is arranged. The heat exchanging portion 36 consisting of the meandering pipe is connected to an inlet pipe 37 on the water supply side and a hot water supply side. Connected to the outlet pipe 38. The outlet pipe 38 is connected to hot water supply means (not shown) such as a shower and a faucet.

On the heat pump unit side, a refrigerant such as carbon dioxide (CO ₂ ) is circulated, and the refrigerant that has been expanded by the expansion valve 30 to a low temperature is raised to room temperature by the air heat exchanger 24. Further, the refrigerant is compressed by the compressor 26 and further heated. The high-temperature refrigerant turns the water that has entered from the water inlet pipe 34 in the water heat exchanger 28 into hot water by heat exchange. This hot water is sent into the hot water tank 32 through the hot water outlet pipe 35, and the secondary water flowing through the heat exchanging portion 36 formed of a meandering pipe in the hot water tank 32 is used as the secondary hot water. It is sent to the hot water supply means via 38.

  The water treatment apparatus of the eighth embodiment has a hot water tank 32 and an auxiliary tank 2, and the auxiliary tank 2 is connected to a hot water discharge pipe 35 immediately before the hot water tank 32. That is, joint pipes 39 and 40 are connected to the front and rear of the hot water pipe 35, and the suction pipe 3 and the return pipe 4 are connected to the front and rear joint pipes 39 and 40. Further, a flow rate adjustment valve 41 is provided in the hot water discharge pipe 35. In the auxiliary tank 2, plate-like photocatalytic particles 12 are arranged, and an infrared lamp 14 is arranged at the top. The hot water sent from the hot water pipe 35 into the suction pipe 3 is purified by decomposing organic substances in the water by the plate-like photocatalytic particles 12 in the auxiliary tank 2. The hot water purified in the auxiliary tank 2 is returned to the hot water tank 32 through the return pipe 4 and circulated between the hot water tank 32 and the auxiliary tank 2 to purify the hot water in the hot water tank 32.

  FIG. 9 is a piping system diagram in which the water treatment apparatus according to the ninth embodiment is applied to a heat pump type hot water heater. In addition, the same code | symbol is attached | subjected to the same member and the same location as 8th Embodiment, and the description is abbreviate | omitted. As shown in FIG. 9, the water treatment apparatus of the ninth embodiment has a hot water tank 32 and a cylindrical auxiliary tank 13, and the suction pipe 3 is cylindrical from the front portion of the hot water pipe 35 via a joint pipe 39. Connected to the lower portion of the auxiliary tank 13. Further, the cylindrical auxiliary tank 13 is connected to the rear part of the hot water pipe 35 through the return pipe 4 and the joint pipe 40, and the rear part of the hot water pipe 35 is connected to the hot water tank 32. An ultraviolet lamp 14 is disposed in the cylindrical auxiliary tank 13 so as to penetrate vertically, and the cylindrical auxiliary tank 13 is filled with a large number of photocatalytic particles (not shown).

  The hot water sent from the hot water pipe 35 into the cylindrical auxiliary tank 13 through the joint pipe 39 and the suction pipe 3 is irradiated with ultraviolet light from the ultraviolet lamp 14 in the photocatalytic particles (not shown) in the auxiliary tank 13. As a result, the organic matter in the warm water is decomposed and purified. The purified hot water is returned to the hot water tank 32 through the return pipe 4, the joint pipe 40, and the rear portion of the hot water pipe 35, and the hot water in the hot water tank 32 is purified.

  FIG. 10 is an external view of a fish breeding tank having the water treatment apparatus of the tenth embodiment. As shown in FIG. 10, in the water treatment device of the tenth embodiment, a large number of substantially spherical photocatalytic particles 7 are arranged at the bottom of the water in the fish breeding tank 1. The photocatalytic particles 7 are obtained by forming a photocatalytic layer on the surface of porous particles or nonporous particles. Further, an ultraviolet lamp 8 is arranged on the side of the fish breeding tank 1, and the organic matter in the water in the fish breeding tank 1 is decomposed by the photolysis action of the photocatalytic particles 7 by the ultraviolet rays emitted from the ultraviolet lamp 8. The water in the fish breeding tank 1 is purified.

  FIG. 11 is an external view of a fish breeding tank having the water treatment apparatus of the eleventh embodiment. As shown in FIG. 11, in the water treatment apparatus of the eleventh embodiment, a circulation tank 43 having a circulation pump 42 is disposed in the fish breeding tank 1. Photocatalytic particles 7 are arranged in the circulation tank 43, and an ultraviolet lamp 8 for irradiating the photocatalytic particles 7 with excitation light is arranged in the vicinity of the outside of the fish breeding tank 1. The circulation tank 43 is formed with a water inlet 43a and a water outlet 43b. With this configuration, the water purified by the photocatalytic particles 7 irradiated with ultraviolet rays from the ultraviolet lamp 8 is circulated in the fish breeding tank 1 from the circulation tank 43 by driving the circulation pump 42, and the fish breeding tank 1 Purify the water.

  In the water treatment apparatus according to each of the embodiments described above, an explanation has been given of the case where an ultraviolet lamp is mainly used as the excitation light source. It is also possible to decompose and purify organic substances in the water.

  The present invention is not limited to the above-described embodiments and modifications, and includes various modifications and design changes within the technical scope without departing from the technical idea of the present invention. Needless to say.

  The water treatment apparatus according to the present invention is used for purifying water, cold water or hot water such as fish breeding tanks for breeding fish such as ornamental fish, tanks for cooling towers, tanks for heat pump water heaters, etc. In addition, it is possible to purify semi-permanently cold water or hot water, and to achieve maintenance-free.

It is the external view which applied the water treatment apparatus of 1st Embodiment of this invention to the fish breeding tank. It is the external view which applied the water treatment apparatus of 2nd Embodiment to the fish breeding tank. It is sectional drawing which applied the water treatment apparatus of 3rd Embodiment to the bathtub. It is sectional drawing which applied the water treatment apparatus of 4th Embodiment to the bathtub. It is the schematic diagram which applied the water treatment apparatus of 5th Embodiment to the cooling tower. It is the schematic diagram which applied the water treatment apparatus of 6th Embodiment to the cooling tower. It is the schematic diagram which applied the water treatment apparatus of 7th Embodiment to the cooling tower. It is the piping system diagram which applied the water treatment apparatus of 8th Embodiment to the heat pump type water heater. It is the piping system diagram which applied the water treatment apparatus of 9th Embodiment to the heat pump type hot water heater. It is an external view of the fish breeding tank which has the water treatment apparatus of 10th Embodiment. It is an external view of the fish breeding tank which has a water treatment apparatus of 11th Embodiment. The cooling tower of a prior art is shown, (12A) is a longitudinal cross-sectional view, (12B) is a top view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fish breeding tank 2 Auxiliary tank 3 Suction pipe 4 Return pipe 5 Circulating pump 6 Activated carbon filter for filtration 7 Spherical photocatalytic particle 8 Ultraviolet lamp 9 Sewage drain pipe 9a Plug 10 Air pump 11 Bath 12 Plate-like photocatalytic particle 13 Cylindrical auxiliary tank 14 UV lamp 15 Cooling tower 16 Water tank 17 Building 18 Delivery pipe 19 Pump 20 Cooling pipe 21 Incoming pipe 22 Transparent plate 23 Heat pump type hot water heater 24 Air heat exchanger 25 First pipe 26 Compressor 27 Second Pipe 28 Water heat exchanger 29 Third pipe 30 Expansion valve 31 Fourth pipe 32 Hot water tank 33 Pump 34 Water inlet pipe 35 Hot water outlet pipe 36 Heat exchange section 37 Inlet pipe 38 Outlet pipe 39 Joint pipe 40 Joint pipe 41 Flow control valve 42 Circulation Pump 43 Circulation tank 43a Water inlet 43b Water outlet

Claims (9)

  A water storage tank in which water is stored, an auxiliary tank that sucks the water in the water storage tank through a suction pipe and returns the water to the water storage tank through a return pipe, and is disposed in the water in the auxiliary tank. The photocatalytic particles having a photocatalytic layer formed on the surface of porous particles or non-porous particles, and at least sunlight introducing means for irradiating the photocatalytic particles with excitation light and / or an excitation light source, Water sucked into the auxiliary tank through the suction pipe is purified by the photocatalytic particles irradiated with the excitation light in the auxiliary tank, and the purified water is purified from the auxiliary tank through the return pipe. A water treatment apparatus, wherein the water in the water tank is purified by being returned to the water tank.   The water treatment apparatus according to claim 1, wherein the water in the water storage tank is circulated to an external system through a delivery pipe and a delivery pipe.   A heat exchange part is provided in the water storage tank, and secondary water is sent from the heat exchange part to an external system via an outlet pipe, and from the external system to the heat exchange part in the water tank via an inlet pipe. The water treatment apparatus according to claim 1, wherein the secondary water is fed.   The water storage tank is a fish breeding tank, and the water purified in the auxiliary tank is returned to the fish breeding tank through the return pipe to purify the water in the fish breeding tank. Water treatment equipment.   The water treatment apparatus according to claim 1, wherein the water storage tank is a bathtub, and water purified in the auxiliary tank is returned to the bathtub through the return pipe to purify the water in the bathtub.   The water treatment apparatus according to claim 2, wherein the water storage tank is a cooling tower water tank for circulating cold water, and the external system is a cooling means for cooling by circulation of the cold water.   The water tank is a hot water tank in which hot water heated to a high temperature by a water heat exchanger of a heat pump is stored in a circulating state, and the external system is the secondary water heated by the heat exchange unit in the hot water tank. The water treatment apparatus according to claim 3, which is hot water supply means for supplying water.   A water treatment apparatus characterized in that photocatalytic particles having a photocatalytic layer formed on the surface of porous particles or nonporous particles are disposed in water in a water tank comprising a fish breeding tank in which water is stored. .   A circulation tank having a circulation pump is arranged in the water storage tank, the photocatalytic particles are arranged in water in the circulation tank, and / or sunlight introducing means for irradiating the photocatalytic particles with excitation light. The water source disposed and purified by the photocatalytic particles irradiated with the excitation light is configured to circulate in the water storage tank from the circulation tank by driving the circulation pump. Water treatment equipment.

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