JP2004337739A - Circulating purification apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circulating purification apparatus which can sufficiently obtain the effect of sterilizing water to be treated, inhibit generation of pathogenic microorganisms etc., thereby effectively reducing bacteria in the water to be treated and the apparatus. <P>SOLUTION: The circulating purification apparatus comprises bath water circulating piping 2, filtration equipment 5, disinfectant dosing equipment 4, and ultraviolet irradiation equipment 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a circulating purification apparatus capable of removing suspended substances such as organic substances and inorganic substances contained in water to be purified and effectively reducing bacteria.
[0002]
[Prior art]
For example, conventional purifiers for boiling water, which are intended for bath water, hot spring water, pools, and hydrophilic water, use pumps to draw hot water in the bathtub through a suction pipe and filter it, thereby removing dirt and garbage in the hot water. Etc. are removed and returned into the bathtub again through the discharge pipe. A disinfectant injection facility is provided in the middle of the flow path from the suction pipe to the discharge pipe.
In a bath equipped with such a purifying device, dirt and the like are removed by circulating and purifying hot water, so that the period for replacing hot water can be extended, and the same hot water is often used for several days. However, it has been found that when the same hot water is used for a long period of time, pathogenic microorganisms such as Legionella bacteria are generated. As a countermeasure against the pathogenic microorganisms, a disinfection device using ultraviolet irradiation has been proposed, but the disinfection effect is not sufficient. This is because slime or the like precipitates in pipes, bathtubs and the like, causing slime. When slimming occurs, pathogenic microorganisms inhabit here, and the occurrence of pathogenic microorganisms is likely to increase.
[0003]
In particular, in circulating water facilities used by an unspecified number of people, such as bathtubs and pools, not only contamination due to hair and the like, but also contamination due to propagation of pathogenic microorganisms has occurred.
In particular, in public baths such as hot springs, infection accidents due to pathogenic microorganisms have occurred, and improvement of water quality and measures against pathogenic microorganisms are required.
As a technique for solving such a problem, conventionally, there is a method of removing contaminants by, for example, filtration, and then disinfecting by ultraviolet irradiation and heating.
In addition, a method of disinfecting by UV irradiation and contact with ozone after filtration, and a method of disinfecting by UV irradiation and chemical injection after filtration can also be used.
In the case of the disinfection method using a chlorine-based chemical, the effect is reduced depending on the quality of the water to be purified, such as alkaline hot spring water.
In addition, in any of the techniques described above, there is a possibility that microorganisms may adhere to the inside of the pipe and proliferate. Although the microorganism itself does not have resistance to chlorine, the disinfecting effect of the agent is reduced by the microorganism being taken up by an organism having chlorine resistance such as amoeba. For this reason, it is necessary to have a pipe or a washing facility capable of washing the pipe in the apparatus.
[0004]
The above prior art is a technique generally known to those skilled in the art, and does not relate to the invention disclosed in the literature.
[0005]
[Problems to be solved by the invention]
In the conventional filtration equipment, when the turbidity in the inflow water is high, the filter body is severely clogged, and when this is eliminated by backwashing, deterioration due to wear of the filter body and the like has been observed. Furthermore, in normal water backwashing, the biomass containing organic substances and pathogenic microorganisms that are the nutrients of microorganisms in the filtration equipment is propagated, so that the filtration equipment itself becomes a source of pathogenic microorganisms, such as Legionella bacteria. There was fear.
In addition, in the case of disinfection having a residual effect, when a sufficient disinfection effect was secured, the disinfection of the user caused discomfort or harm to the user or the environment. In the case of disinfection with non-residual effects, if there is no disinfecting power of pathogenic microorganisms in the latter stage of non-residual disinfection, bacteria or pathogenic microorganisms will proliferate and safety for users cannot be ensured. was there.
When sodium hypochlorite is used as a disinfectant, there has been a problem that carrying out the work requires a large amount of labor and cost in remote islands and mountainous areas.
When disinfecting corrosive wastewater by irradiating it with ultraviolet light, there was a problem that the inside of the SUS316L casing in the stagnant portion rapidly corroded and pinholes were generated, but the grade of the material was raised to reduce the corrosion. Then, the material cost is tripled, and the cost increases. Electropolishing is usually performed, but has little effect on corrosiveness.
[0006]
The present invention has been made in order to solve the above-described problems, and a sufficient disinfection effect of the water to be treated can be obtained, and the generation of pathogenic microorganisms and the like can be suppressed. An object of the present invention is to provide a circulating purification device capable of effectively reducing bacteria.
[0007]
[Means for Solving the Problems]
The circulation purification apparatus according to the present invention is characterized by comprising a bathtub water circulation pipe, a filtration facility, a disinfectant addition facility, and an ultraviolet irradiation facility.
[0008]
The circulating purification apparatus according to the present invention is characterized by comprising a hot spring water circulation pipe, a filtration facility, a disinfectant addition facility for disinfecting pathogenic microorganisms, and an ultraviolet irradiation facility for disinfecting pathogenic microorganisms. .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a flowchart showing a circulation purification apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a schematic diagram of the circulation purification apparatus of FIG.
The circulating purification device according to the first embodiment is connected to a bath 1 such as a bathtub or a pool, and connected to the bath 1 so that water in the bath (for example, bathtub water, hot spring water, pool water, hydrophilic water, etc.) is used by a plurality of persons. A bathtub water circulation pipe 2 for circulating used water as a target water to be purified is provided. A circulation pump 3, a disinfectant addition facility 4, and a filtration facility are provided in the bathtub water circulation pipe 2. 5 and the ultraviolet irradiation equipment 6 are provided. When hot spring water is circulated through the bathtub water circulation pipe 2, the bathtub water circulation pipe 2 is referred to as hot spring water circulation pipe 2.
[0010]
Next, the operation of the first embodiment will be described.
The disinfectant is added from the disinfectant addition equipment 4 to the circulating water in the bathtub water circulation pipe 2 in a state where the water to be treated in the tank 1 is circulated by the bathtub water circulation pipe 2 by operating the circulation pump 3. Is done. Here, the disinfectant adding equipment 4 is provided with a sodium hypochlorite injection pump (not shown). The sodium hypochlorite injection pump supplies sodium hypochlorite to the circulating water in the second embodiment. Is injected for disinfection purposes. After the injection, impurities are removed from the circulating water by the next filtration equipment 5, and then the bacteria remaining in the circulating water are inactivated by the ultraviolet irradiation equipment 6, and the treatment after the inactivation is performed. When the water returns to the tank 1, the water to be treated in the tank 1 is purified.
[0011]
By providing a plurality of the ultraviolet irradiation equipment 6, the purifying effect can be further enhanced.
The disinfection by the disinfectant addition equipment 4 is for the purpose of eliminating infectivity of pathogenic microorganisms (for example, Legionella bacteria) closely related to infectious diseases and contamination, and improving the sanitary safety of the water to be treated. Is what you do. Describing sterilization here, sterilization refers to destroying the cell viability of microorganisms or destroying and inactivating nucleic acids of viruses if they are bacteria. Disinfection also includes its disinfection.
[0012]
Regarding the bathtub water circulation pipe 2, solids such as hot spring sediments and human wastes flow together with water in the pipe, and the solids flow together with the water even if the circulation flow rate is too fast or too slow. Therefore, it is preferable to select the circulation pump 3 so that the inside of the pipe has an appropriate flow velocity (for example, about 0.6 to 2.0 m / sec). Such solid deposits such as hot spring sediments and human wastes can be prevented, and the formation of biofilm in the piping can be suppressed. Further, it is still more effective to minimize the bending of the bathtub water circulation pipe 2 and to minimize the uneven pipe.
[0013]
A heat-resistant hard vinyl chloride pipe is generally used for the pipe material of the bathtub water circulation pipe 2, but a heat-resistant hard vinyl chloride-lined steel pipe, a nylon-coated steel pipe, a stainless steel pipe, and the like are used for parts requiring strength. Further, it is more preferable to use a titanium tube in a high-temperature portion where corrosion resistance is required.
Further, in order to prevent slime from being generated in the pipes and the like after the disinfectant addition equipment 4 and to supply treated water free of pathogenic microorganisms to a bathtub or the like, a bathtub water circulation pipe 2 is provided as copper, silver, nickel, By using a tube coated with an antibacterial material, a tube mixed with an antibacterial material, or a tube made of an antibacterial material, slime can be prevented from being generated.
[0014]
It is important to note that the filtration equipment 5 for hot spring water is an obstacle due to the hot spring sediment (scale). The sediment that dissolves in the hot spring and precipitates after springing out is inorganic, bacteria, algae, etc. From the biological settlements, earth and sand, and other diverse. These adhere to the filter medium, the inner surface of the pipeline, etc., and cause trouble.
In order to remove the adhesion of the scale, there are a method of dissolving with a chemical agent, a method of mechanically scraping, and a method of mixing hot water with boiled fresh water. However, for ease of control, a phosphoric acid agent (non-scale agent) is used for measures against scale. This is because the phosphoric acid agent is added to phosphate ions during the precipitation of water-insoluble calcium carbonate and calcium hydroxide in the alkaline region, so that the process of entering the acidic region slows down the process of generating scale such as calcium carbonate.
[0015]
Further, the slime generated in the pipes after the disinfectant addition equipment 4 may be physically removed by throwing in a cleaning ball and collecting it. The cleaning ball may be made of any material suitable for cleaning, such as rubber or sponge.
[0016]
As the circulating pump 3, a line pump or a spiral pump is usually used in the case of a bath facility or a hot spring facility. In particular, in the case of a hot spring facility, the material of the pump is determined comprehensively based on the corrosiveness (durable years) of the quality of the hot spring and the cost required for pump replacement. .
・ Sodium-chloride spring: Bronze, SUS316, titanium, silicon cast iron
・ Simple spring: Cast iron, bronze
・ Simple sulfur springs: silicon cast iron, titanium, bronze
・ Sulfate spring: Bronze, SUS316
・ Iron (II) -sulfate spring: SUS304, SUS316, titanium, silicon cast iron
・ Calcium (magnesium) -bicarbonate spring: cast iron, SUS316, titanium, austenitic cast iron
・ Sodium-bicarbonate spring: Cast iron, SUS316, titanium
[0017]
The filtering equipment 5 is classified into two types, a physical filtering equipment and a biological purification equipment, in terms of functions.
However, the biological purification equipment uses a porous natural stone, a ceramic ball, activated carbon, or the like as a filter medium, and is a system in which microorganisms are propagated and filtered. Therefore, there is a problem that the biological purification facility easily becomes a hotbed of Legionella bacteria. For this reason, physical filtration equipment is better in bath facilities and hot spring facilities.
When the filtration equipment 5 is classified according to the filtration method, there are three types: sand type, diatomaceous earth type, and cartridge type. Of these, the cartridge type cannot be backwashed in the case of a thread-wound cartridge using a fibrous filter, and in the case of a pleated cartridge made of polyester nonwoven fabric, it cannot be backwashed without removing the cartridge. 5 easily becomes unsanitary and easily becomes a hotbed of Legionella bacteria. For this reason, bath facilities and hot spring facilities are less preferable than the other two methods.
Therefore, if the filtration equipment 5 is a diatomaceous earth type, of the three types, the filtration accuracy is the highest, and by setting up a backwashing pipe, backwashing is possible by manual valve operation or automatic valve operation. Therefore, it is optimal for general bath facilities.
In addition, even in the case of the sand-type filtration equipment 5, the back-washing can be performed by assembling the back-washing pipe in the same manner as in the case of the diatomaceous-earth type, and the filtration is not as large as the diatomaceous-earth type. The accuracy is moderately high, the waste of human body level is reliably captured, and the medicinal components of hot spring water pass through. In addition, the sand-type filtration equipment 5 has a property that is resistant to fluctuations in water quality, and is therefore most suitable for hot spring equipment. The material of the filter medium includes sand, ceramic, anthracite, and the like.
The material of the main body of the filtering equipment 5 may be a steel coated with resin, stainless steel, FRP, or the like. Particularly, in the case of hot spring equipment, the corrosion resistant FRP is most suitable.
The purification effect can be further enhanced by providing a plurality of filtration equipment 5 before the ultraviolet irradiation equipment 6 or after adding a disinfectant.
It is also possible to use a filter in which a metal plate is laminated on the filtering equipment 5. The metal plate has minute projections, and the height of the projections becomes the material passage diameter, and those having a diameter equal to or larger than the material passage diameter are deposited on the metal plate laminated surface. The laminated metal plate has a configuration in which the laminated end is pressed by a spring.
In the filtration equipment 5 having such a configuration, the inflow water flows in from the surface of the filter body formed by stacking the metal plates as described above, and the filtered water is discharged from the gap at the center of the filter body. Backwashing uses filtered water and backflow from the center of the filter. At this time, the space between the metal plates is widened by the water pressure of the backwash water, and the efficiency of the backwash operation is improved.
Therefore, according to the filtration equipment 5, in the filtration of a liquid having a high concentration of turbidity, stable filtration performance without clogging can be ensured, and there is no deterioration of the filter body and there is no consumable part. Can be greatly reduced.
[0018]
Embodiment 2 FIG.
FIG. 3 is a schematic diagram showing a circulating purification apparatus according to Embodiment 2 of the present invention. The same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and redundant description will be omitted.
With the operation of the apparatus of the present invention, in ordinary water backwashing, a biofilm containing an organic substance or a pathogenic microorganism serving as a nutrient source of microorganisms may sometimes propagate in the filtration equipment 5, so that the filtration equipment 5 itself is pathogenic. This embodiment 2 has a configuration in which a drug is injected into backwash water as shown in FIG. Things.
[0019]
The detailed configuration will be described below.
In FIG. 3, reference numeral 7 denotes a backwash water supply pipe connected to a backwash water storage facility or a faucet, 8 denotes a drug injection facility for injecting a drug into the backwash water in the backwash water supply pipe 7, and 9 denotes the aforementioned This is a backwash drain pipe branched from a bathtub water circulation pipe (circulation pipe between the disinfectant addition equipment 4 and the filtration equipment 5) 2 on the primary side of the filtration equipment 5, and the middle of the backwash drain pipe 9 It is connected to a connection joint between the washing water supply pipe 7 and the bathtub water circulation pipe 2. V1 is an on-off valve provided between the tank 1 and the circulation pump 3 in the bathtub water circulation pipe 2, and V2 is provided between the disinfectant addition facility 4 and the backwash drain pipe 9 connection part in the bathtub water circulation pipe 2. Open / close valve, V3 is an open / close valve provided for backwash drainage, V4 is an open / close valve provided between the connection part of backwash water supply pipe 7 with bathtub water circulation pipe 2 and chemical injection equipment 8, and V5 is a bathtub V6 is an on-off valve provided between the filtration equipment 5 and the ultraviolet irradiation equipment 6 in the water circulation pipe 2, and V6 is an on-off valve provided on a connection pipe between the backwash water supply pipe 7 and the backwash drain pipe 9. Reference numeral denotes an on-off valve provided between the secondary side of the ultraviolet irradiation equipment 6 in the bathtub water circulation pipe 2 and the circulating water inlet of the tank 1.
[0020]
Next, the operation of the second embodiment will be described.
During normal purification processing, the on-off valves V1, V2, V5, and V7 are opened, and the other on-off valves V3, V4, and V6 are closed, and the water to be treated is circulated and purified in the same manner as in the first embodiment.
In the second embodiment, when backwashing the filtration equipment 5, the on-off valves V2, V5 and V6 are closed and the on-off valves V3 and V4 are opened. When washing water is supplied, the backwashing water is supplied with the medicine by injecting the medicine from the medicine injection equipment 8 into the filtration equipment 5. As a result, not only the contaminants deposited in the filtration facility 5 but also the organic matter and pathogenic microorganisms attached to the filtration facility 5, for example, a biofilm containing Legionella bacteria, can be more reliably disinfected. The backwash water is discharged from the backwash drain pipe 7 to the outside of the system.
The chemical to be added to the backwash water may be any substance as long as it effectively works for removing pathogenic microorganisms.
[0021]
Although the circulating purification device according to the second embodiment can disinfect the water to be treated by injecting the chemical and irradiating the ultraviolet rays, it is possible to prevent the biofilm from being formed on the inner wall of the bathtub water circulation pipe 2 by operating for a long time. In order to prevent corrosion of the material, a high concentration (5 to 10 mg / L) chlorinating agent is injected and circulated in the bathtub water circulation pipe 2 to remove the biofilm attached to the pipe 2. It becomes possible.
In addition, even with non-residual disinfection such as UV irradiation, photocatalyst, and high-temperature disinfection, the biofilm attached to the pipe 2 can be removed.
[0022]
Embodiment 3 FIG.
FIG. 4 is a schematic diagram showing a circulating purification apparatus according to Embodiment 3 of the present invention, and the same or corresponding parts as those in FIGS.
When sodium hypochlorite is used as a disinfectant to be added to the circulating water of the water to be treated, the sodium hypochlorite has the property of decomposing over time to generate oxygen. When an infusion pump was used, air bubbles were generated in the pump and piping, and an infusion failure such as a gas lock occurred.
Therefore, Embodiment 3 of the present invention has a configuration in which a chemical injection pump 10 including a submersible piston pump is provided in the disinfectant addition equipment 4. That is, the cylinder 11 serving as the pump head of the chemical injection pump 10 is immersed in a sodium hypochlorite solution, and the sodium hypochlorite flowing into the cylinder 11 is injected by the piston into the injection point 2a of the water circulation pipe 2 in the tank. It is configured to be extruded and injected.
[0023]
As described above, the sodium hypochlorite is extruded and injected into the injection point 2a of the injection pipe 4a from the disinfectant addition equipment 4 to the bathtub water circulation pipe 2 by the chemical injection pump 10 including a submersible piston pump. It has become possible to eliminate the above-mentioned injection failure such as gas lock.
In the bathtub water circulation pipe 2 in FIG. 4, a bypass pipe 12 is provided between a pipe from the secondary side of the ultraviolet irradiation equipment 6 to a circulating water return port of the tank 1 and a pipe between the tank 1 and the circulation pump 3. By connecting and providing the on-off valve V8 in the bypass pipe 12, the bathtub water circulation pipe 2 including the filtration equipment 5 can be washed and disinfected with a high concentration disinfectant.
[0024]
Embodiment 4 FIG.
FIG. 5A is an enlarged schematic cross-sectional view of an injection point 2a which is a connection portion between the injection pipe 4a and the hot spring water circulation pipe 2 in FIG. 4, and FIG. 5B is a diffuser at the injection point 2a in FIG. 13 is an enlarged cross-sectional view of the injection point 2a of the circulating purification apparatus according to Embodiment 4 of the present invention provided with an injection point 13;
When the circulating purification apparatus of the present invention is applied to bath water of a hot spring, calcium concentration is high in the bath water, and when sodium hypochlorite is injected, as shown in FIG. Due to the reaction between sodium and the hardness in the hot spring bath water, scale S is deposited in the injection pipe 4a, and the injection point 2a may be blocked.
Therefore, by providing the diffuser 13 at the injection point 2a, the injected sodium hypochlorite does not stay and the reaction with calcium in the hot spring bath water does not occur, so that injection failure such as blockage of the injection point 2a occurs. Could be eliminated.
[0025]
Embodiment 5 FIG.
FIG. 6 is a schematic diagram showing a circulating purification apparatus provided with a disinfectant addition facility with a soft water facility according to a fifth embodiment of the present invention. The same parts as in FIG.
When diluting sodium hypochlorite and injecting it into the circulating water in the bathtub water circulation pipe 2, calcium contained in the diluting water precipitates and may cause an injection failure by adhering to the injection pipe 4a or the chemical injection pump 10. There is.
Therefore, a fifth embodiment of the present invention is directed to the circulation purification apparatus of the third embodiment (FIG. 4), in which a soft water facility 14 filled with a cation exchange resin is provided in a disinfectant addition facility 4, and the soft water facility 14 is The calcium in the dilution water is removed by the disinfectant addition equipment 4 by passing the dilution water to reduce the calcium contained in the dilution water and then injecting the same into the disinfectant addition equipment 4. From 4, sodium hypochlorite is supplied to the injection point 2 a by the chemical injection pump 10. With such a configuration, it is possible to suppress the occurrence of scale in the sodium hypochlorite injection pipe 4a, so that the injection failure can be prevented.
[0026]
Embodiment 6 FIG.
FIG. 7 is a schematic diagram showing a circulating purification apparatus having a disinfectant injection point according to Embodiment 6 of the present invention. The same parts as those in FIGS. 4 and 6 are denoted by the same reference numerals, and redundant description is omitted.
Some of the chemicals for the purpose of disinfection are decomposed by ultraviolet rays, so that the ultraviolet irradiation equipment 6 downstream of the filtration equipment 5 may lose the residual effect of the chemicals.
Therefore, when the circulating purification device of the present invention is used for circulating hot spring water or the like, in the sixth embodiment, the disinfectant injection point 2a in the preceding stage of the filtering equipment 5 in the fifth embodiment is indicated by a dotted line in FIG. As described above, the disinfectant injection point 2b is located at a position subsequent to the ultraviolet irradiation equipment 6, or the disinfectant injection point 2b is provided at the rear of the ultraviolet irradiation equipment 6 in addition to the disinfectant injection point 2a before the filtration equipment 5. Is provided.
With such a configuration, it is possible to reduce a decrease in the residual effect due to the decomposition of the chemical in the ultraviolet irradiation equipment 6. Further, even when a disinfectant is introduced before the filtration equipment 5, the concentration and amount of the disinfectant added can be adjusted to a concentration and an amount at which the ultraviolet irradiation equipment 6 becomes favorable.
In addition, by providing a plurality of disinfectant addition equipment 6 as described above, the purification effect can be further enhanced.
[0027]
When a chlorine-based chemical is used when the pH value of the water to be treated is high, the proportion of hypochlorous acid (HCI0) having a strong disinfecting power decreases. Therefore, it is said that the disinfecting effect is reduced, and there is a problem that the effect cannot be obtained unless the injection rate of the chemical is increased or the contact time after the injection of the chemical is long.
Accordingly, in the present invention, chlorine dioxide, which is said to have a higher disinfecting effect than chlorine at pH 8.5 or higher, is injected to suppress the chemical inflow and achieve a higher disinfecting effect. By injecting chlorine dioxide into the water to be treated, the disinfection effect is maintained, and a high disinfection effect can be obtained. Furthermore, the disinfection effect was twice that of sodium hypochlorite, and chlorine odor was eliminated. Further, any disinfectant having a residual property such as ozone which can be used without adversely affecting the human body and the apparatus can be used.
[0028]
With respect to the disinfectant addition equipment 4 to be injected into the piping, disinfection by chlorine using a chlorine-based chemical such as liquid sodium hypochlorite, solid calcium hypochlorite, chlorinated isocyanuric acid, etc. is common. Disinfection with chlorine dioxide is still effective because there is no chlorine odor in the bath water and the disinfection is stronger than chlorine. Alternatively, the disinfection of the filtration equipment 5 can be further improved by introducing a solid chlorine agent into the filtration equipment 5. Also, a bromine-based disinfectant can be used. Further, even when there is a chlorine odor, when the ionic wind is diffused into the air, not only the chlorine odor is diluted, but also a cleaning action for suppressing the growth of bacteria is produced, and further, there is a sedative action.
[0029]
The circulating purification device according to the present invention can reliably disinfect pathogenic microorganisms in influent water by non-residual disinfection such as ultraviolet irradiation, photocatalyst, and high-temperature disinfection in the use of circulating water. By providing a residual disinfectant such as chlorine, chlorine, chlorine dioxide, etc., the disinfection effect can be maintained in the water to be treated and the pathogenic microorganisms can be suppressed. In the case of this combination, the injection amount of the residual disinfectant may be small, so that discomfort to the user due to the odor of the residual disinfectant can be reduced.
[0030]
Embodiment 7 FIG.
FIG. 8 is a schematic diagram showing a circulating purification apparatus in which the sodium hypochlorite production facility according to Embodiment 7 of the present invention is installed in a disinfectant addition facility.
Here, when sodium hypochlorite is used as a disinfectant, there is a problem that a large amount of labor and cost are required for carrying in the work in remote islands and mountainous areas.
Therefore, in the seventh embodiment, as shown in FIG. 8, the sodium hypochlorite production facility 15 is provided in the disinfectant addition facility 4. The sodium hypochlorite production facility 15 includes a salt storage tank 16 and a dilute brine brine tank 17, and supplies dilute brine from the dilution brine brine tank 17 to the sodium hypochlorite production facility 15 with a pump 18. ing.
[0031]
By installing such sodium hypochlorite generation equipment 15 in the disinfectant addition equipment 4, sodium hypochlorite can be generated locally, so that labor required for carrying in sodium hypochlorite can be reduced. In addition, the use of late-night power has made it possible to reduce costs associated with the production of sodium hypochlorite. In addition, the sodium hypochlorite production equipment 15 produces | generates by an electrolysis method, but any of a diaphragm type and a non-diaphragm type may be used. Furthermore, since the concentration of sodium hypochlorite generated by the sodium hypochlorite generation equipment 15 is thinner than commercially available sodium hypochlorite, even if the injection is carried out as it is, the injection due to generation of scale or deposition of heavy metals. The clogging of the point 2a can be prevented.
Therefore, it is extremely effective for countermeasures against pathogenic microorganisms in bathtubs and pools, and can provide a comfortable use environment for users.
[0032]
In the above embodiment of the present invention, the ultraviolet irradiation equipment 6 can use a low-pressure lamp or a medium-pressure lamp, and the medium-pressure lamp is suitable for a large-sized lamp, but requires a large amount of electric power and further generates heat. Because of the large volume, it is difficult to control the temperature and it is suitable for bath water, so a low pressure lamp is usually used.
However, when the amount of circulating water is large, a medium-pressure lamp (for example, 2.8 kW) can be used. Further, a low-pressure lamp (for example, 65 W) or a low-pressure high-output lamp (for example, 130 W or 250 W) can be used depending on the amount of circulating water and the degree of pollution.
[0033]
Corrosion protection of metals is caused by outflow of current (corrosion current) from metal surfaces in electrolytes of hot spring water and seawater. The cathodic protection is a method of continuously supplying an electric current that only overcomes the electric current artificially, and includes an external power supply method and a galvanic anode method.
In the external power supply method, a durable electrode is installed in the hot spring water or seawater serving as the electrolyte, and the + terminal of the DC power supply and the anticorrosive body are connected to the-terminal using a power supply. The anti-corrosion current is supplied to the surface of the anti-corrosion body through the electrolyte from the electrolyte.
The galvanic anode method uses an anode (current anode) such as aluminum, magnesium, and zinc for a metal having a lower potential than the anticorrosion target in the electrolyte, for example, iron, and an iron anode or the above for copper. The anode is electrically connected (using electric wires and welding) to prevent corrosion.
Here, as a design factor common to the external power supply method and the galvanic anode method, the minimum corrosion protection potential required to stop corrosion is called a corrosion protection current density, and means a current required per unit area of a corrosion protection target.
[0034]
Embodiment 8 FIG.
FIG. 9 is a schematic view showing an ultraviolet irradiation equipment having anticorrosion measures according to Embodiment 8 of the present invention, and FIG. 10 is a schematic sectional view of FIG.
The above-mentioned galvanic anode method has the disadvantage that the anode needs to be replaced after one or two years, and it is difficult to mount it on a disinfection device using ultraviolet rays.
Therefore, in the circulating purification device of the present invention, an external power supply system is used as shown in FIGS. In FIGS. 9 and 10, reference numeral 19 designates an electrode facility and a potential sensor at the entrance and exit of the ultraviolet irradiation facility 1, respectively. Reference numeral 21 denotes a preliminary sensor provided in the ultraviolet irradiation equipment 6.
Here, the anticorrosion potential is -0.6 V, and the anticorrosion current density is 0.2 A / m. ² However, it is desirable to determine in consideration of the effects of the metal material, dissolved oxygen in the target water, flow velocity, water temperature, and the like.
[0035]
Embodiment 9 FIG.
FIG. 11 is a schematic diagram showing a scale removing facility of an ultraviolet irradiation facility of a circulating purification apparatus according to Embodiment 9 of the present invention.
Here, when the bathtub water or hot spring water is irradiated with ultraviolet rays to continue disinfection, slime and mineral scale adhere to the inside of the circulating purification apparatus of the present invention. For this scale removal, the lamp surface was cleaned with a wiper.In this case, the slime and mud could be removed, but the scale could not be removed. I was
Therefore, in the ninth embodiment, as shown in FIG. 11, a wiper handle 22 is provided in the ultraviolet irradiation equipment 6, and the wiper handle 22 is automatically operated by the control equipment 23. V10 to V13 are provided to perform chemical circulation. Alternatively, the operation is performed such that the medicine flows only to the wiper handle 22.
As the chemical, sodium hypochlorite is used. Any substance can be used as long as it can remove scale and does not adversely affect water quality.
Thus, the circulation and purification device of the present invention can be easily maintained and managed.
[0036]
Embodiment 10 FIG.
FIG. 12 is a schematic diagram showing a trap for safety treatment when a component is broken in the ultraviolet irradiation equipment according to Embodiment 10 of the present invention.
In the tenth embodiment, as shown in FIG. 12, the ultraviolet irradiation equipment 6 is provided with a leak detection equipment 30 and a trap 31.
When foreign matter is mixed in the bathtub water circulation pipe 2 and the components in the ultraviolet irradiation equipment 6 are damaged, the bathtub water circulation pipe 2 is stopped when the electric leakage detection equipment 30 detects the electric leakage, and is cleaned and inspected for damage. Removing the object is the safest and safest treatment. However, by providing the trap 31 on the outflow side of the ultraviolet irradiation equipment 6, for example, in the case of a bathtub or a pool, damage to the human body can be minimized. Heavy safety measures.
In the circulation purification apparatus of the present invention, electric power is required to turn on the ultraviolet lamp R of the ultraviolet irradiation equipment 6. This is covered by a generator that combines solar power and an inverter. Furthermore, a circulation pump can be used as long as the installation area of the solar power generator can be obtained. It is also possible to combine with a wind power generator. The ultraviolet irradiation equipment 6 can be operated using nighttime power. This is effective when the circulation purifying device is operated when there are few bathers at night.
Hereinafter, examples of the present invention will be described.
[0037]
Embodiment 1 FIG.
Hot spring water 18m ³ / Hr, the ultraviolet irradiation equipment 6 has two high-output low-pressure lamps (130 W, transmittance 85%), and the circulation pump 3 has a circulation flow rate of 0.1 (m / sec) in the ultraviolet irradiation equipment 6. The disinfectant addition equipment 4 dilutes sodium hypochlorite (effective chlorine concentration 12%) and adds it so that the free residual chlorine concentration in the bathtub becomes a concentration of 0.2 to 0.4 mg / L. As a result, a sand type was used for the filtration equipment 5. SUS316 was used for the hot spring water circulation pipe 2.
In the case of conventional disinfection using only sodium hypochlorite, it is generally said that 45% of Legionella bacteria are detected in hot spring water when it is examined. Legionella bacteria were not detected during the period.
The same effect was obtained even when chlorine dioxide was used in the disinfectant addition equipment 4.
Further, the anticorrosion measures using the external power supply method are as follows: the side of the apparatus of the present invention using ultraviolet rays, which is in contact with hot spring water, material SUS316, area 5 m. ² , Using a DC power supply, a Pt-Ti electrode and a potential sensor, a corrosion protection current density of 0.2 A / m ² The required corrosion protection current (corrosion protection area × corrosion protection current density) was 1A. Further, it is easy to install electrodes. Driving under these conditions did not show any corrosion protection.
[0038]
【The invention's effect】
As described above, according to the present invention, the following excellent effects were obtained.
・ Sufficient disinfection effect was obtained, and the generation of pathogenic microorganisms was suppressed.
-By circulating the residual disinfection, the disinfection effect of the bathtub water circulation pipe and filtration equipment in the device can be obtained.
-By selecting the material of the filter media that is suitable for the quality of the inflow water, deterioration due to abrasion and the like can be prevented, and even if a sufficient disinfection effect is ensured, there is no discomfort to the user or the environment, and pathogenic microorganisms propagate. No security was required, and safety for users was ensured.
-When disinfecting the corrosive wastewater by irradiating it with ultraviolet light, the anticorrosion could be prevented by supplying the anticorrosion current to the surface of the anticorrosion body through the electrolyte from the electrode. Furthermore, since the electrodes are easy to install and do not need to be replaced, the management is simple.
・ The water to be treated is circulated in the apparatus by a circulation pump, the disinfectant is injected, the filtration treatment is performed to remove impurities in the water to be treated, and the ultraviolet irradiation equipment is used. By inactivating the bacteria remaining in the water to be treated and purifying the water to be treated, the disinfection effect was ensured.
-Regarding the piping system, a circulation pump was selected so that the flow rate would be appropriate, and it was possible to prevent sedimentation of hot spring sediments and waste products from the human body, and to suppress the formation of biofilm in the piping. .
・ When using hot spring water as a target for filtration, note that hot springs; obstacles due to sediment (scale); substances that dissolve in hot spring water and precipitate after springing out include inorganic substances, bacteria, algae, etc. It is caused by biological settlements, earth and sand, and other various things. These are attached to the filter media, the inner surface of the pipeline, etc., and cause damage. By using a phosphoric acid agent (non-scale agent) for scale removal, The scale generation process has become slow.
-The life cycle cost was improved by comprehensively judging and selecting the material of the circulating pump based on the corrosiveness (durable years) of the hot spring water and the cost required for pump replacement.
・ The material of the filter medium can be backwashed, it is difficult to become a hotbed of microorganisms, it can reliably capture human waste, and the medicinal component of hot spring water is selected from passing substances, so bath facilities and pollution Ideal for equipment.
When a metal plate is laminated and used as a filter, the filter is not clogged and the calculated filtration performance can be ensured. The filter does not deteriorate, there is no consumable part, and the running cost can be reduced.
・ Injection of chemicals into the backwash water at the time of backwashing of the filtration equipment, not only to impurities deposited in the filtration equipment, but also to organic substances and pathogenic microorganisms attached to the filtration equipment, such as filtration equipment A more reliable disinfection of the biofilm containing the slightly remaining Legionella bacteria can be achieved.
-The biofilm containing pathogenic microorganisms can be removed by injecting a chlorine agent at a concentration (about 5 to 10 mg / L) that does not cause corrosion in pipes and equipment and irradiating with ultraviolet rays.
・ By immersing the pump head in the sodium hypochlorite solution and pushing out the sodium hypochlorite flowing into the cylinder with the piston, it has become possible to eliminate injection failures such as gas lock. .
・ In the case of target water with high calcium concentration, use of "diffuser" at the injection point when injecting sodium hypochlorite eliminates the retention of the injected sodium hypochlorite and reacts with calcium in the water. Injection failure such as blockage of the injection point can be eliminated by preventing the occurrence of the injection.
-Also, by using a method of performing injection after reducing the calcium contained in the dilution water when diluting and injecting sodium hypochlorite, the generation of scale in the injection pipe is suppressed, Injection failure can be prevented.
If the injection point of the disinfectant is changed to the injection point after the ultraviolet irradiation equipment, or the injection point of the disinfectant is added to the injection point after the ultraviolet irradiation equipment, the chemicals will be decomposed by the ultraviolet irradiation equipment. , It is possible to reduce the reduction of the residual effect.
・ Water to be treated with high pH has a disinfection effect twice that of sodium hypochlorite. By injecting chlorine dioxide without chlorine odor, the disinfection effect can be maintained and a high disinfection effect can be obtained. It has become possible.
-Even if there is a chlorine odor, dispersing the ionic wind into the air not only dilutes the chlorine odor, but also produces a purifying action that suppresses the growth of bacteria, and further provides a sedative action.
・ By installing sodium hypochlorite generation equipment, sodium hypochlorite can be generated locally, so the labor required to carry in sodium hypochlorite can be reduced, and electricity should be used at midnight. As a result, it has become possible to reduce costs associated with the production of sodium hypochlorite. Furthermore, since the sodium hypochlorite concentration generated by the sodium hypochlorite generator is thinner than commercially available sodium hypochlorite, even if the injection is performed as it is, the injection point due to generation of scale or deposition of heavy metals. Clogging can be prevented.
・ Electrocorrosion protection provided equipment that continuously overpowered the current to overcome the current, thereby preventing equipment corrosion.
・ Continuing disinfection by irradiating circulating water with ultraviolet light showed that mineral scale adhered to the slime in the device of the present invention. To remove this scale, the lamp surface was cleaned with a wiper. Is automatically operated, and the chemical circulation is performed by attaching a switching valve, or the operation is performed such that the chemical flows only to the wiper, thereby removing the mineral scale and facilitating the maintenance and management.
・ If foreign matter is mixed in the bathtub water circulation pipe and the parts in the ultraviolet irradiation equipment are damaged, stop the bathtub water circulation pipe that has detected the leakage, By installing a drain trap on the outflow side of the ultraviolet irradiation equipment so as to prevent the outflow, a double safety measure has been taken to minimize damage to the human body.
-The electric power for turning on the ultraviolet lamp can be provided by a generator using a combination of solar power generation and an inverter. Furthermore, a circulation pump can be used as long as the installation area of the solar power generation can be obtained. It is also possible to combine with wind power generation.
-From these, the present invention circulates the water to be treated, removes foreign substances by filtration and disinfects pathogenic microorganisms in the influent water by non-persistent disinfection such as ultraviolet irradiation, photocatalyst, high-temperature disinfection, etc. At the same time, by adding a residual disinfectant such as sodium hypochlorite, chlorine, chlorine dioxide, etc., the disinfecting effect is maintained in the water to be treated and the propagation of pathogenic microorganisms is suppressed. In the case of this combination, since the injection amount of the residual disinfection may be small, it is possible to reduce the discomfort to the user such as the odor of the residual disinfection and to provide the user with a comfortable use environment. Furthermore, it is a circulating purification device that is easy to maintain.
[Brief description of the drawings]
FIG. 1 is a flowchart showing a circulating purification apparatus according to Embodiment 1 of the present invention.
FIG. 2 is a schematic diagram of the circulation purification device of FIG.
FIG. 3 is a schematic diagram showing a circulation purification device according to a second embodiment of the present invention.
FIG. 4 is a schematic diagram showing a circulating purification device according to Embodiment 3 of the present invention.
5 (A) is an enlarged schematic sectional view of an injection point which is a connection portion between the injection pipe and the hot spring water circulation pipe in FIG. 4, and FIG. 5 (B) is a diffuser at the injection point in FIG. 5 (A). FIG. 13 is an enlarged cross-sectional view of the injection point of the circulation purification device according to the fourth embodiment of the present invention, the device including:
FIG. 6 is a schematic diagram showing a circulating purification apparatus provided with a disinfectant addition facility having a soft water facility according to a fifth embodiment of the present invention.
FIG. 7 is a schematic diagram showing a circulating purification apparatus having a disinfectant injection point according to Embodiment 6 of the present invention.
FIG. 8 is a schematic diagram showing a circulating purification apparatus in which a sodium hypochlorite production facility according to Embodiment 7 of the present invention is installed in a disinfectant addition facility.
FIG. 9 is a schematic diagram showing a circulating purification device in which anticorrosion measures are taken for ultraviolet irradiation equipment according to Embodiment 8 of the present invention.
FIG. 10 is a schematic sectional view of FIG. 9;
FIG. 11 is a schematic diagram showing a scale removing facility of an ultraviolet irradiation facility of a circulating purification apparatus according to Embodiment 9 of the present invention.
FIG. 12 is a schematic diagram showing a trap for safety treatment when a component in the ultraviolet irradiation equipment is damaged according to the tenth embodiment of the present invention.
[Explanation of symbols]
1 tank
2 Bathtub water circulation piping (hot spring water circulation piping)
3 circulation pump
4 Disinfectant addition equipment
5 Filtration equipment
6 UV irradiation equipment
7 Backwash water supply pipe
8 Drug injection equipment
10 Chemical injection pump
11 Pump head (cylinder)
12 Bypass pipe
13 Diffuser
14 Soft water equipment
15 Sodium hypochlorite production equipment
16 Salt storage tank
17 Dilution salt water tank
18 pump
19 Electrode equipment
20 Potential sensor
21 Spare sensor
22 Wiper handle
23 Control equipment
30 Leakage detection equipment
31 trap
V1-V8 On-off valve
V10-V13 switching valve
R UV lamp

Claims (2)

A circulation purification device comprising a bathtub water circulation pipe, a filtration facility, a disinfectant addition facility, and an ultraviolet irradiation facility. A circulation purification device comprising a hot spring water circulation pipe, a filtration facility, a disinfectant addition facility for disinfecting pathogenic microorganisms, and an ultraviolet irradiation facility for disinfecting pathogenic microorganisms.

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