JPH09141285A - Circulation purifying device for contaminated liquid - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device capable of preventing the deterioration of decomposition action caused by the deposition of a decomposition product on a base material on which a useful microorganisms are fixed, purifying a contaminated liquid even just after the device is newly installed or the base material is cleaned and heating the contaminated liquid to a desired temp. by a burner combustion type heating means. SOLUTION: In this circulation purifying device for storing the liquid 12 contaminated with time in a liquid storing means 10 and purifying and sterilizing the liquid 12 at the outside of the storing means 10 while being circulated by a pump, a biological purifying means 40 for decomposing and purifying organic materials contained in the liquid 12 with microorganisms, an electrolyzing means 38 for electrolyzing the liquid 12 to accelerate the oxidation decomposition of the organic materials and a liquid heating means 15 provided with a burner combustor 11 and a heat exchanger 13 are provided the circulation passage of the contaminated liquid 12 is formed by connecting successively the biological purifying means 40, the electrolyzing means 38 and the liquid heating means 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for circulating and purifying contaminated liquid, and more particularly to circulating a liquid which is contaminated over time, such as bath water in a bathtub or water in a warm water pool. It can be purified and sterilized, and in addition, it can be heated to a required temperature by a burner type heating means for burning gas, petroleum, etc., and is particularly preferably used for household and commercial use. It relates to a circulation purification device.

[0002]

2. Description of the Related Art For example, bath water stored in a bathtub is unavoidably contaminated with dust, sand, and other organic substances such as dirt and hair during bathing, and is contaminated over time, resulting in turbidity, odor, and other sliminess. It is generally known that comfort during bathing is impaired. In addition, the situation is exactly the same in the pool as well, and with use, the stored water in the pool is contaminated over time, which impairs comfort during swimming and is unsanitary. In this case, if the stored water in the bathtub or pool is replaced with new water each time it is used, the problems described above will not occur, which is ideal, but the cost of using tap water and the cost of boiling it in hot water There are various drawbacks, such as the fact that (for example, in the case of a warm water pool) becomes bulky, it takes time to exchange water, and that it is impossible to enjoy bathing or swimming at any time.

As one solution proposal for such a problem, a circulation purification device for a bath generally known as a "24-hour bath" is known. This device is intended especially for domestic use and contains a cartridge in which useful microorganisms are propagated on an aggregate substrate such as crushed stone, gravel or other granular ceramic, and bath water is forced into the cartridge. It can be recycled. A filter made of, for example, sponge is provided in the communication path between the circulation device and the bath. At the time of use, the circulating pump incorporated in the device is driven to suck the bath water in the bathtub, and the sponge filter collects and filters large dust such as hair and thread waste mixed in the bath water. . Then, the pre-filtered bath water is passed through the cartridge, where organic substances such as dirt and body fat in the bath water are decomposed by microorganisms to be cleaned up to an allowable value or less.

[0004]

However, in the above-described purification apparatus according to the prior art, when the organic matter in the bath water is decomposed by the microorganisms propagated on the aggregating base material, fine contaminants produced by the decomposition action. Adhere to the surface of the substrate. For this reason, it is pointed out that if the purification of the bath water with microorganisms is continued, the contaminants cover the surface of the base material in a film form, and the decomposition action of the microorganisms is significantly reduced. In addition, when the amount or size of organic matter exceeds the ability to decompose microorganisms, it takes a considerable amount of time to completely decompose the organic matter, and accumulates on the substrate surface. It was causing a decline.

In addition, since aggregate base materials such as crushed stone, gravel and other granular ceramics, which function as a carrier for microorganisms, are considerably heavier than water, bath water is introduced into the cartridge filled with the base materials. However, it does not flow, and therefore, it is hardly expected that the organic substances adhered / deposited on the surface of the base material will be naturally peeled off by the inflow action of the bath water. For this reason, in the conventional device, it is necessary to wash water substantially forcibly by injecting water into the collective base material in the cartridge from the opposite direction or by aerating the base material with air. It was Further, depending on the model, it is also necessary to take out the cartridge from the apparatus and mechanically agitate the collective base material inside or the user manually agitate. In this way, when the base material is regularly cleaned, continuous purification of bath water is interrupted and bathing becomes impossible, and in most cases, the bath water has to be considerably discarded from the bath, which saves water and reduces costs. From a viewpoint, it is a big problem. Further, in order to sufficiently purify the bath water with the collective base material in which the microorganisms are propagated, it is necessary to secure the area where the base material comes into contact with water as much as possible, and therefore a considerable amount of base material is prepared. It is desirable to do. However, since the crushed stone, gravel, and other granular ceramics, etc. constituting the base material are considerably heavy, there is a drawback that the weight of the purifying device itself becomes heavy, which makes it inconvenient to handle.

Further, in order for the microorganisms to exert a sufficient decomposing power for organic substances, it is necessary that the microorganisms are properly propagated on the surface of the base material. However, since it is difficult to immobilize microorganisms in advance in the collective substrate typified by the above-mentioned granular ceramics, the bath water is circulated after the purification device is installed, and the microorganisms living in the bath water are circulated. It has to wait for the spores to naturally propagate and settle on the substrate surface. Further, when the collective substrate is washed regularly, the microorganisms already propagated and fixed on the substrate may be removed more than necessary. Propagation of microorganisms and stable colonization generally take several days to several weeks, during which purification of bath water by microorganisms can hardly be expected. For this reason, after the cleaning device is newly installed in the bathtub or after cleaning the collective base material in the cartridge, the cleaning function of the bath water does not work, and water stains progress, causing unpleasant turbidity and odor. There was an inconvenience that caused such problems. Therefore, after new equipment is installed or after cleaning the base material, it is necessary to refrain from bathing until the microbes are properly purified, and bath water is used several times until the microbes are stably propagated on the base material. There is a problem in that it takes time and labor to re-install, the amount of water used increases, and the cost increases.

Regarding the above-mentioned "24 hour bath",
In order to be able to take a bath at any time, it is necessary to keep the temperature of the bath water constantly at 38 ° C. to 40 ° C., which is a suitable bath temperature, and the conventional circulation purification device controls the temperature by an internal electric heater. I am supposed to do it. However, electric heaters generally do not have a large heat capacity, so when many people take a bath continuously and the water temperature drops,
It is difficult to raise the temperature in a short time during the season when the outside temperature decreases. The electric heater having a large heat capacity has a drawback that the manufacturing cost becomes high and the electricity cost increases. That is, as long as the electric heater is used as the heating source, the reheating function for rapidly raising the temperature of the bath water cannot be expected due to the manufacturing cost, electricity costs, and the like.

[0008]

SUMMARY OF THE INVENTION The present invention has been proposed in order to suitably solve the problems inherent in the above-described conventional apparatus for purifying contaminated liquids, and is a base material on which microorganisms that decompose organic substances are fixed. It prevents degradation products from degrading due to the accumulation of decomposition products, and can clean the contaminated liquid even immediately after new equipment is installed or immediately after cleaning the base material. It is an object of the present invention to provide a circulation purification device that can raise the temperature of the liquid to a required temperature as needed.

[0009]

In order to overcome the above-mentioned problems and preferably achieve the intended purpose, the present invention stores a liquid contaminated with time in a liquid storage means and stores the contaminated liquid. In a circulation purification device for polluted liquids, which is purified and sterilized while being circulated by a pump outside the means, a microbial purification means for decomposing and purifying organic substances contained in the polluted liquid by microorganisms, and electrolysis of this polluted liquid And a liquid heating means including a burner combustor and a heat exchanger, which are connected to the microbial purification means, the electrolysis means and the liquid heating means to circulate the contaminated liquid. The feature is that the route is configured.

In order to overcome the above-mentioned problems and suitably achieve the intended purpose, another invention of the present application is to purify and sterilize the contaminated liquid in a storage tank by pumping up the contaminated liquid. After that, in the circulating purification apparatus for contaminated liquid that is returned to the storage tank again, a microbial purification tank filled with a granular synthetic polymer gel in which microorganisms for adsorbing and decomposing organic substances contained in the contaminated liquid are present, An electrolytic cell that electrolyzes the contaminated liquid to accelerate the oxidative decomposition of the organic matter, and a liquid heating device that includes a burner combustor and a heat exchanger are provided, and the microbial purification tank, the electrolytic cell, and the liquid heating device are connected to each other. The circulation path of the contaminated liquid is configured.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a circulating liquid purification apparatus for a contaminated liquid according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments. As an example, a circulation purification device provided in a domestic bathtub as a heating source for boiling water by burning city gas or propane gas with a burner will be described, but in addition to this, it can be suitably used for a hot water pool or the like. Of course. Further, the heating source is not limited to the gas burner, and may be, for example, a type of burning petroleum with the burner.

(Regarding Overall Structure of Circulation Purification Device) FIG.
1 shows a schematic configuration of a circulation purification apparatus according to an embodiment of the present invention, which purifies bath water 12 stored in a bath 10 and contaminated with time while pumping circulation of the bath water 12 outside the bath 10. And sterilization. That is, as shown in FIG. 5, the circulation purification device according to the embodiment has a water supply / drainage unit 14 detachably arranged in the bathtub 10, and a device body 20 connected to the unit 14 via a water absorption hose 16 and a drain hose 18. It is basically composed of and.
This device body 20 is installed, for example, at the edge of the bathtub 10 and is supplied with power via an earth leakage breaker 22 and a cable 24, and is surely grounded by an earth cable 26 to ensure complete protection against earth leakage and electric shock. Has been. As will be described later with reference to FIG. 6, the water supply / drainage unit 14 is detachably attached to the inner wall surface of the bathtub 10 by a suction cup 28, for example, and is located below a general storage level of the bath water 12.

The water supply / drainage unit 14 shown in FIGS. 5 and 6.
Is composed of, for example, a rectangular box-shaped casing 30, and a water suction port 32 for sucking bath water in a vertical relationship and a discharge port 34 for returning the purified bath water to the bath 10 are provided on the front surface of the casing 30. Further, the suction cup 28 is arranged on the back surface of the box-shaped case 30, and the water supply / drainage unit 14 is attached to the bathtub 1.
It can be attached to the inner wall surface of 0. The water suction port 32 is connected to the apparatus main body 20 through a water suction hose 16 and a filter 36 made of, for example, a sponge material is detachably provided at the opening of the water suction port 32 to remove large dusts mixed in the bath water. It is designed to collect and remove hair and other foreign matter. Further, the discharge port 34 is communicatively connected to the apparatus body 20 via the drain hose 18. The water inlet 32 and the outlet 34 connect the water supply / drainage unit 14 to the bathtub 1.
When it is attached to the inner wall surface of No. 0, it is completely immersed in bath water. Then, when the circulation purification device described later is operated, the bath water in the bathtub 10 flows into the device body 20 through the water suction port 32 and the water suction hose 16 under the action of the circulation pump, and is purified and sterilized here. After that, the cycle of returning to the bathtub 10 via the drain hose 18 and the discharge port 34 is repeated.

As shown in FIG. 1, the apparatus main body 20 of the circulation purifying apparatus has a microbial septic tank 40 for adsorbing and decomposing organic substances contained in the bath water 12 contaminated with time by microorganisms to purify it, and the bath water 12. An electrolytic bath 38 that electrolyzes and promotes oxidative decomposition of organic matter such as dirt contained therein;
Gas combustor (hereinafter referred to as "burner") 11 and heat exchange tube 1
3, and each of these tanks are connected to each other through a pipe through which the bath water 12 is circulated, and a part of the communication pipe is connected to the heat exchange pipe 1 of the water heater 15.
It is designed to connect to 3.

In FIG. 1, the water absorption hose 16 provided in the water supply / drainage unit 14 is connected to the inlet side of the microbial purification tank 40 via a bath water circulation pump 44, and the microorganism purification tank 40 is connected.
The outlet side of is connected to the inlet side of the electrolytic cell 38 via a pipe line 46. Further, the outlet side of the electrolytic cell 38 is connected to the inlet side of the heat exchange pipe 13 in the water heating device 15 via a pipe line 48. Further, the heat exchange tube 13 in the water heating device 15
The outlet side of is connected to the drain hose 18 via a pipe line 54. A flow rate sensor 56 for detecting the flow rate of the bath water is inserted in the pipe 54 through which the bath water returns to the bath 10, and the outlet side of the electrolytic cell 38 is connected to the inlet side of the water heating device 15. A temperature sensor 58 for detecting the temperature of bath water is inserted in the conduit 48. Further, inside the electrolytic bath 38, a water level sensor 60 for monitoring the water level in the bath.
Are arranged. The position of the water level sensor 60 is
It is not limited to the electrolysis tank 38, and may be inside the microbial purification tank 40. These sensors are connected to the control circuit 62 shown in the control block of FIG. 8, and the information necessary for various controls of the apparatus main body 20 is input to the circuit 62.

(About water heating device) The water heating device 15
For example, as shown in FIG. 2, when only one is provided, a closed loop pipe system for circulating bath water is formed between the bath 10 and the water heating device 15, and the bath water is exclusively used. It will be used only for reheating. However, as shown in FIG.
It is generally recommended that the water heating device 15 be composed of a first heating device 17 that reheats bath water and a second heating device 19 that heats tap water to supply it to the hot water supply system. That is, the first heating device 17 is mainly used for reheating the bath water, and in consideration of the durability of the heat exchange pipe 13 when the burner 11 is ignited, the inlet side conduit 48 of the heat exchange pipe 13 is taken into consideration. The bypass pipe 21 is communicatively connected between the outlet pipe 54 and the outlet side pipe line 54, and the first close / open valve 23 driven by an electromagnetic valve is inserted in the bypass pipe 21. Also the second
The heating device 19 also includes a burner 25 and a heat exchange tube 27.
The inlet side of the heat exchange pipe 27 is connected to an external water supply system 29. Further, the outlet side of the heat exchange tube 27 is 2
One is connected to a hot water supply system 31 such as a kitchen or a shower not shown, and the other is connected to the first heating device 17
Is connected to the inlet side of the heat exchange pipe 13 in the above through a pipe line 33. A check valve 35 and a second open / close valve 37 driven by a solenoid valve are inserted in series in the conduit 33. Reference numeral 41 represents a blower provided in each of the first heating device 17 and the second heating device 19.

With the second closing valve 37 closed,
When the burner 11 of the first heating device 17 is ignited, the bath water circulated by the pump 44 is heated by the heat exchange tube 13 as will be described later, so-called reheated water is added to the bath 1
Returned to 0. When the burner 25 of the second heating device 19 is ignited, the tap water supplied from the water supply system 29 is heated by the heat exchange pipe 27 and the hot water is supplied to the hot water supply system 31.
Further, if the second close valve 37 is opened and both burners 11 and 25 of the first heating device 17 and the second heating device 19 are ignited,
After the temperature of the tap water from the water supply system 29 is raised by the second heating device 19, it is further raised by the first heating device 17,
Bath water reheated and bath water newly replenished are simultaneously supplied to the bathtub 10.

(About microbiological septic tank) Microbiological septic tank 40
Is for adsorbing and decomposing and purifying the organic matter contained in the bath water 12 by the decomposing action of microorganisms, and in this embodiment, a synthetic polymer gel is preferably used as a carrier for microorganisms. As the synthetic polymer gel, granular polyvinyl alcohol (hereinafter referred to as "PVA") gel having excellent water resistance, elasticity and flexibility and having high water content is preferably used. For example, as shown in FIG.
Is an upright cylindrical casing 70, a tubular water channel 72 disposed inside the casing 70 and extending along a central axis, an inflow port 70a and an outflow port opened at the bottom of the casing 70. 70b and the casing 70
It is basically composed of a required amount of PVA gel 74 filled inside. The inlet 70a and the outlet 70b are
A filter 76 having a mesh size that prevents the granular PVA gel 74 from flowing out is provided. Therefore, the bath water that has flowed into the casing 70 through the inflow port 70a reverses after rising in the centrally located tubular water flow path 72 and descending the annular water retention portion 78, and then outflow port 70b.
It is something that flows out from.

As the PVA gel 74, it is desirable to use the PVA gel which has been entrapped and fixed so that useful microorganisms that decompose organic substances such as dirt and body fat contained in bath water are included in advance. Examples of useful microorganisms of this kind include Pseudomonas spp., Aspergillus spp.
illus) and Saccharomycetes, microorganisms and enzymes, and other activated sludge used for wastewater treatment, nitrifying bacteria, denitrifying bacteria and the like. By comprehensively immobilizing such useful microorganisms on the PVA gel 74, the organic substances are decomposed by the microorganisms immediately after the start of using the apparatus. Each of the PVA gels 74 is in the form of particles having a diameter of about several mm, and the PVA gels 74 are filled so as to occupy about 20% to 50% of the casing 70. That is, by adjusting the filling amount of the PVA gel 74 to this extent, the bath water flowing into the casing 70 can freely flow the PVA gel 74, so that the residue produced after being decomposed by microorganisms is PVA. The disadvantage of adhering to the surface of the gel 74 is avoided. When a gel that has not been subjected to entrapping immobilization of microorganisms is used as the PVA gel 74, it waits for the microorganisms to naturally land on the PVA gel 74 and propagate.

(About Electrolyzer) As shown in FIG. 4, for example, the electrolyzer 38 includes an upright box-shaped casing 64 and two electrode portions 6 disposed inside the casing at a required interval.
6, 68, and by selecting the polarity of the DC voltage applied thereto, one electrode portion 66 can function as an anode and the other electrode portion 68 can function as a cathode. . As the material of the anode 66, aluminum, stainless steel, ferrite, platinum, platinum-coated titanium (Ti) or the like is preferably used, and as the cathode 68, aluminum, platinum, platinum-coated (Ti) or the like is preferably used. To be Among these electrode materials, stainless steel and aluminum tend to be eluted into the bath water by electrolysis. In this case, since the organic substances in the bath water are aggregated with the metal ions eluted in the bath water as nuclei, it can be expected that the organic substances can be easily collected and filtered in the subsequent process. In this embodiment, platinum-coated titanium (Ti) is used for both the anode 66 and the cathode 68. The casing 64 may have a cylindrical shape, or the casing 64 may serve as one of the electrodes. Furthermore, the number of electrodes does not have to be a plurality of pairs, and may be an odd number array.

(Regarding the Ozonizer) The ozonizer 96 shown in FIG. 8 may be inserted separately in the pipe system that connects the above-mentioned microbial purification tank 40, electrolysis tank 38 and water heating device 15 to each other. As will be described later, ozone is also generated when the bath water is electrolyzed in the electrolytic bath 38, and the sterilizing action is achieved. However, by additionally using the ozonizer 96, sterilization can be performed more reliably. The location of the ozonizer 96 may be in a pipeline through which the bath water circulates, but it is desirable that the ozonizer 96 is disposed at a position that does not interfere with the action of the microorganisms inhabiting the inside of the microorganism purification tank 40. The bath water circulation pipe and the ozonizer 96 are connected via a solenoid valve 99 shown in FIG. 8. By opening the solenoid valve 99, ozone is injected into the bath water in the pipe, and the solenoid valve 99 Closing will stop ozone injection into the bath water.

(Regarding Control Block of Device) FIG. 8 schematically shows a block for individually controlling the electrical components of the circulation purification device according to the present invention, and the flow rate sensor 56 and the temperature sensor described above are included in the control circuit 62. 58 and water level sensor 60
Are connected to input respective detection information to the control circuit 62. The memory (RAM) 98 stores various kinds of information and command data necessary for automatically operating the circulation purification device, and exchanges signals with the control circuit 62. The solenoid valve 99 is opened and closed by a valve drive circuit 89 which receives a control command from the control circuit 62.
Driven by Similarly, the circulation pump 44 is driven by a pump drive circuit 45, and the burner 11 (25) is driven by a burner drive circuit 93. The electrolytic cell 38 is driven by the electrolytic cell drive circuit 39, the ozonizer 96 is driven by the ozonizer drive circuit 97, and the display 94, which displays information necessary for various operations, is driven by the display drive circuit 95 in a timely manner. .

(Operation of Circulation Purification Device) Next, the operation of the circulation purification device according to the embodiment thus configured will be described with reference to the flowchart shown in FIG. Prior to the operation of the purifying device, the temperature value of the bath water, the start and end times of electrolysis in the electrolytic bath 38, and the start and end times of the processing in the ozonizer 96 are set in the memory (RAM) 98. It has been done in advance. The memory (R
These set values input to (AM) are displayed on the display 94 so that they can be easily visually confirmed. Further, it is assumed that bath water is stored in the bathtub 10 to a required level of filling water.

In step S ₁ of FIG. 8, it is confirmed whether or not an operation key (not shown) provided in the circulation purification device is turned on (ON), and if the result is affirmative (YES), the circulation pump 44
Is driven, and the bath water in the bath 10 starts to circulate in the pipeline system shown in FIG. Then, the circulating pump 44 is driven and the next operation is awaited. During this waiting, the process proceeds to step S ₂ to check whether the water level of the bath water in the electrolytic bath 38 is at a specified value or not, and if the result is negative (NO), an error is displayed on the display 94. Then, the drive of the circulation pump 44 is stopped. The result goes to step S _3, if affirmative (YES), checks whether the flow rate of the bath water flowing through the conduit in the has reached a prescribed value, if the result is negative (NO), the process also An error is displayed on the display 94 and the circulation pump 4
The drive of 4 is stopped. If the result is affirmative (YES),
Then, the process proceeds to next step S ₄ . The water level sensor 60
If the confirmation by the flow rate sensor 56 is affirmative (YES),
The operation of the circulation pump 44 is continued, and the bath water from the bath 10 circulates in the order of the microbial purification tank 40, the electrolysis tank 38, and (the heat exchange tube 13 of) the first heating device 17, and then the bath 1
The cycle of returning to 0 again is repeated. The purification process in the microbial septic tank 40 in this case will be described later.

In step S ₄ , the temperature of the bath water flowing into (the heat exchange tube 13 of) the first heating device 17 is stored in the memory (RAM).
Check whether it is lower than the set value to 98, and the result is affirmative (Y
If ES, the burner 11 is automatically ignited (ON) to raise the temperature of the bath water passing through the heat exchange tube 13. If the result of step S ₄ is negative (NO), the burner 11 is automatically extinguished (OFF) and the process proceeds to the next step S ₅ . In this step S ₅ , it is confirmed whether or not the processing time in the electrolytic cell 38 previously set in the memory (RAM) 98 has come, and if the result is negative (NO), the electrolytic cell drive shown in FIG. 13 is performed. Circuit 3
9 is continuously turned off (OFF), and if the result is affirmative (YES), the electrolytic cell drive circuit 39 is turned on (ON) to start the electrolytic action of the electrolytic cell 38. The electrolysis process in the electrolysis tank 38 will be described later. Next, in step S ₆ , it is confirmed whether or not the processing time in the ozonizer 96 has come.
If the result is negative (NO), the ozonizer drive circuit 97 and valve drive circuit 89 shown in FIG. 13 are continuously turned off (OFF).
If the result is affirmative (YES), the ozonizer drive circuit 97 and the valve drive circuit 89 are turned on (ON) to inject ozone into the bath water in the pipeline. Then, in step S ₇ , it is confirmed whether or not the operation key is turned off (OFF). If the result is negative (NO), the process returns to the previous step S ₂ and the above-mentioned confirmation work is repeated. Also if the result at the step S ₇ is affirmative (YES), it stops the operation of the circulation pump 44.

(Regarding Process in Microbial Septic Tank) As described above, the microbial septic tank 40 is filled with an amount such that the PVA gel 74 in which microorganisms such as bacteria have been propagated and fixed in advance can freely flow by the inflow of bath water. Has been done. Therefore, the contaminated bath water from the bathtub 10 is circulated by the circulation pump 44.
When the PVA gel 74 is sucked up by and is supplied to the microbial septic tank 40, the PVA gel 74 is violated by the flow of the bath water and vigorously flows. When the bath water contaminated by use comes into contact with the PVA gel 74, the microorganisms propagated and fixed on the PVA gel 74 decompose organic matter such as dirt and body fat in the water to produce sludge-like contaminated residue. The contamination residue tends to adhere to the PVA gel 74 in a film form, but the PVA gel 74 is extremely difficult to adhere because it is flowing violently in the tank, and the contaminant adheres to the PVA gel 74. Even if the gel flows, it is easily peeled off. Therefore, the PVA gel 74 does not become clogged, and periodical maintenance such as cleaning processing and replacement of these PVA gels 74 becomes unnecessary. Further, since the PVA gel 74 flows violently, it is possible to secure a large effective contact area for the bath water supplied to the microbial septic tank 40, and it is possible to exert a sufficient purification power for the bath water.

Further, some of the components of the PVA gel 74 tend to be eluted in the bath water. The eluted components function as a flocculant for a part of the organic matter in the water and cause a part of the organic matter to coagulate. Leading to. Then, the partially aggregated organic matter is dispersed and mixed in the bath water together with the organic matter which is not decomposed by the microorganisms and the sludge-like pollution residue generated by the decomposition. In this example, since the PVA gel 74 used was one in which microorganisms were entrapped and fixed,
It is not necessary to wait for the microorganisms to propagate in the PVA gel 74 filled in the microorganism purification tank 40, and the ability of the microorganisms to purify organic substances can be sufficiently exhibited from the beginning of use. That is, since the organic substances are sufficiently decomposed from the beginning of the installation of the circulation purifying device, the bath water can be enjoyed bathing with clean bath water without causing turbidity or sliminess of the bath water at the beginning. However, even with PVA gel 74 that has not been subjected to entrapping immobilization of microorganisms, the elution of gel components has the effect of aggregating some organic substances as described above, so even before the microorganisms proliferate. The purification effect of is obtained.

(Regarding Process in Electrolyzer) In FIG. 1, the bath water, which has been purified by the microbial septic tank 40, flows into the electrolyzer 38 through the pipe 46, and a required DC voltage is applied. The positive electrode 66 and the negative electrode 68 are in contact with each other. Therefore, the bath water is electrolyzed to generate oxygen gas in the vicinity of the anode 66, and the hydrogen ion concentration of the bath water existing around the anode 66 becomes high and becomes acidic. Further, hydrogen gas is generated in the vicinity of the cathode 68, and the concentration of hydrogen ions in the bath water existing around the cathode 68 is lowered to become alkaline. Moreover, on the side of the anode 66, organic substances such as dirt and body fat contained in the bath water are oxidatively decomposed and become minute. A part of the oxidatively decomposed organic matter becomes insoluble and aggregates in a colony state.

Further, in the vicinity of the anode 66, active oxygen is produced in the form of ozone (O ₃ ) or hydrogen peroxide (H ₂ O ₂ ). Therefore, various bacteria in the bath water are sterilized to a considerable extent by this active oxygen. Furthermore, since the vicinity of the anode 66 becomes strongly acidic and the vicinity of the cathode 68 becomes strongly alkaline due to electrolysis, the sterilizing effect is exhibited even by such a change in the hydrogen ion concentration (pH). The anode 66
Oxygen gas and acidified water generated in the vicinity of the
Hydrogen gas and alkalized water generated in the vicinity of 8 do not exist in a clearly separated state, but exist in a state where steam water is mixed in the bath water. The bath water, which is partially sterilized by this electrolytic decomposition and in which finely divided organic substances are aggregated, is supplied from the electrolytic bath 38 to the water heating device 15 via the downstream pipe line 48.

When electrolysis is carried out in the electrolytic cell 38, the pH value in the vicinity of the cathode 68 rises due to the generation of the alkaline water described above, and calcium ions and magnesium ions contained in the bath water are deposited on the surface of the cathode 68. To do.
When the surface of the cathode 68 is coated with these deposits in a layered manner as described above, there is a disadvantage that the electrolytic action is gradually reduced. Therefore, in the present embodiment, the amount of water flowing into the electrolytic cell 38 after the start of electrolysis is integrated and measured by the flow rate sensor 56, and when the measured value reaches the amount of water flowing preset in the memory (RAM). Cleaning is performed by applying a DC voltage of opposite polarity to the cathode 68 and the anode 66, and dissolving the deposit covering the cathode 68. It should be noted that instead of integrating the water flow rate of the bath water, the water flow time may be integrated as a function of polarity conversion in the electrodes.

(Regarding Process in Water Heating Device) The bath water electrolyzed in the electrolytic bath 38 passes through the pipe line 48 in which the temperature sensor 58 is installed and the water heating device 15 (first heating device 17).
Supplied to The temperature sensor 58 measures and monitors the temperature of the bath water passing through the pipe 48, and when the detection result of the sensor 58 is lower than the set value in the memory (RAM) 98 shown in FIG. The burner drive circuit 93 is controlled to ignite the burner 11 to perform so-called reheating of the bath water. On the contrary, when the detection result of the temperature sensor 58 is higher than the set value in the memory (RAM) 98, the control circuit 62 causes the burner drive circuit 9
A control command is given to 3 to extinguish the burner 11. In this way, the bath water passing through the heat exchange tube 13 of the first heating device 17 is reheated as necessary and is maintained at a temperature suitable for bathing. Further, in the embodiment of FIG. 1 provided with two water heating devices 17 and 19, when the amount of water in the bathtub 10 decreases, as described above, the first heating is performed with the second closing valve 37 open. The device 17 and the second heating device 19 are ignited. As a result, the tap water from the tap water supply system 29 is heated in the first heating device 17 after being heated in the second heating device 19, and the bath water after being heated in the bathtub 10 and the new replenishing bath water are generated. Supplied together. When two water heating devices 17 and 19 are provided as the water heating device 15, as described later,
With a slight modification to the pipeline system in which the bath water circulates,
It is possible to easily select a normal operation mode → a bypass mode that does not pass through each tank → a bath filling mode in which the bath is filled.

With respect to the water heating device 15, the reason why the first closed / open valve 23 is inserted in the bypass pipe 21 as shown in FIG. 1 will be described. When the bath water is not reheated, the first open / close valve 23 is opened to bypass a part of the purified bath water from the heating device 17, and when the bath water is reheated. Is used to maintain the durability of the heat exchange pipe 13 by closing the bath water to allow the bath water to pass exclusively through the heat exchange pipe 13 and reducing the pressure during water pressure feeding. That is, since the heat exchange tube 13 is for raising the temperature of the bath water by the heat from the burner 11, the tube thickness is set thin and the inner diameter of the hollow hole is set small in order to increase the heat exchange efficiency. . Therefore, the durability of the heat exchange tube 13 is not sufficiently high with respect to the water pressure applied from the inside of the tube. In particular, the bath water of the present embodiment is supplied to the heat exchange pipe 13 under high pressure by the circulation pump 44, and is not preferable from the viewpoint of maintaining the durability of the pipe.

Therefore, when only circulating the bath water without additional heating, the first closing valve 23 is opened to bypass a portion of the purified bath water to the pipe 54 via the pipe 21. When reheating is performed, the first closing / opening valve 23 is closed, the circulation pump 44 is switched to low speed operation, and the bath water is supplied to the heat exchange pipe 13 at a low supply pressure. It is a thing. This procedure will be described with reference to the flowchart of FIG. After initializing various operation requirements, an operation key (not shown) is turned on to turn on the circulation pump 44 in normal operation. The bath water to confirm whether or not it is more than the set flow rate in step S _1, the process proceeds to step S ₂ if affirmative (YES). If the confirmation result in step S ₂ is affirmative (YES), the first closing valve 23 is closed and the circulation pump 44 is switched to the low speed operation. As a result, the supply pressure of the bath water becomes low, so that the burner 11 of the first heating device 17 is ignited (ON). That is, although the reheating operation is started, since the bath water passing through the heat exchange tube 13 of the first heating device 17 is maintained at a low pressure, the durability of the heat exchange tube 13 is not impaired.

If the confirmation result in the step S ₂ is negative (NO), the burner 11 of the first heating device 17 is extinguished (OFF) and the first closed / open valve 23 is opened. The circulation pump 44 is
Switch from low speed operation to steady operation. As a result, the reheating is stopped, and the purified bath water flows separately in both the heat exchange pipe 13 of the first heating device 17 and the pipe line 21 which is the bypass line. Also in this case, the heat exchange tube 1
The durability of No. 3 is not impaired, and the circulating resistance of bath water is not increased. In addition, a switching valve is provided at a branch portion of a pipe line 48 connected to the outflow side of the electrolytic cell 38,
When the reheating is not performed by switching the switching valve, the bath water may not be passed through the heat exchange pipe 13 of the first heating device 17, but may be passed through the bypass pipe 21 only. .

(Regarding Modifications of Each Structure) The structure of the present invention is not limited to the embodiment shown in FIG.
Various changes can be made without departing from the spirit of the invention. For example, as shown in FIG. 2, the electrolytic cell 38, the microbial purification tank 40, and the water heating device 15 may be arranged in this order in the flowing direction of the bath water. In the embodiment shown in FIG. 1, since the electrolytic cell 38 that performs a sterilizing action is located close to the bath 10, the number of bacteria and microorganisms contained in the bath water returning to the bath 10 can be further reduced, and the slime can be reduced. Can be suppressed more effectively. In the electrolyzer 38, the active oxygen (hydrogen peroxide) generated near the anode 66 by electrolysis has the ability to kill not only the bacteria contained in the bath water but also useful microorganisms that decompose organic substances. There is. Therefore, as shown in FIG.
When disposed on the upstream side of the above, the bath water containing the active oxygen may flow into the microorganism purification tank 40 to kill the useful microorganisms propagated and fixed on the PVA gel 74. Of course, since the life of active oxygen is extremely short, even in the case of the example shown in FIG.
There will be no problem if you take care to keep the space between and. However, as shown in FIG.
If it is arranged on the upstream side of 8, the microbial purification tank 40 and the electrolysis tank 38 can be installed very close to each other, which can contribute to downsizing of the entire apparatus.

In the electrolytic cell 38 shown in FIG. 2, the inflow side pipeline 53 and the outflow side pipeline 46 are shown by a two-dot chain line pipeline 49.
Alternatively, a part of the bath water may flow into the downstream microbial purification tank 40 without passing through the electrolysis tank 38. This is effective in reducing the distance between the electrodes in the electrolytic cell 38. That is, in the electrolytic bath 38, by narrowing the distance between the electrodes 66, 68, electrolysis of bath water can be more efficiently performed by applying a low voltage DC. According to this, it is possible to reduce the load on the DC power source, and there is no fear of an electric shock accident, so that safety is improved. However, on the other hand, there is a problem in that the flow path resistance of the bath water in the electrolytic cell 38 increases, and the load on the circulation pump 44 increases conversely. In such a case, if the bypass conduit 49 is provided on the inflow side to the electrolytic cell 38 as described above, the overall flow path resistance can be suppressed low, and in addition to reducing the load on the DC power supply,
The load on the circulation pump 44 can also be reduced.

(Operation Mode When Two Water Heating Devices are Provided) When the water heating device 15 is provided with the two heating devices 17 and 19 described above, the operation modes shown in FIGS. Can be adopted. For example, the pipeline system of FIG. 10 basically adopts the arrangement of FIG. 1, and a first switching valve 43 is provided on the inlet side of the heat exchange pipe 13 in the first heating device 17, and the first switching valve 43 is provided. Of the pipe line 33 (leading out from the outlet side of the heat exchange pipe 27) is connected to the first switching side, and the pipe line 48 (leading out from the outlet port of the electrolytic cell 38) is connected to the second switching side. There is. The circulation pump 44
The second switching valve 55 is provided on the discharge side, and the conduit 53 (derived from the inlet side of the microbial septic tank 40) is connected to the first switching side of the second switching valve 55. Further, a pipe line 47 is led out from between the check valve 35 and the second closing / opening valve 37 inserted in the pipe line 33, and the pipe line 47 is connected to the second switching side of the second switching valve 55. ing.

FIG. 10 shows the normal operation mode.
The first switching valve 43 is switched to the second switching side that communicates with the pipe 48, and the second switching valve 55 is used for the microbial septic tank 4.
It is switched to the first switching side communicating with 0. Therefore, the bath water is not circulated in the pipe line 47. Further, the second closing / opening valve 37 is closed, and communication with the tap water supply system 29 is cut off. If the circulation pump 44 is operated in this state,
As described above, the bath water in the bathtub 10 is the microbial septic tank 4
It circulates through the path of 0 → electrolyzer 38 → first heating device 17, and a suitable purification of the bath water is achieved. In the first heating device 17, the burner 11 is timely depending on the temperature of the bath water.
Is fired by the ignition of.

FIG. 11 shows a bypass mode in which bath water does not pass through each tank. The first switching valve 43 is switched to the first switching side communicating with the pipe 33, and the second switching valve 43 is connected to the second switching valve 43.
The switching valve 55 is switched to the second switching side that communicates with the pipe line 47. Therefore, the discharge side of the circulation pump 44 is cut off from the communication with the microbial septic tank 40, and
It is in communication with 7. The second open / close valve 37 is also closed, and the supply of tap water is cut off. When the circulation pump 44 is operated in this state, the bath water in the bathtub 10 flows through the pipe line 47 and the pipe line 33, and passes through the first switching valve 43 and the first heating device 17 (heat exchange pipe 13) to the bathtub. The cycle of returning to 10 is repeated. That is, depending on the state of the bath water, purification or filtration may not be necessary, so at this time, the bath water is bypassed without being circulated in the microbial purification tank 40 and the electrolytic cell 38. As a case where this mode is required, it is assumed that the burner 11 of the first heating device 17 is ignited to only reheat the bath water.

FIG. 12 shows a water filling mode when the bathtub 10 is filled with water. In this case, the first switching valve 43 is connected to the conduit 3 as in the bypass mode described above.
3, and the second switching valve 55 is switched to the side communicating with the pipe line 47. However, the circulation pump 44 is stopped, and the second closing / opening valve 37 is opened to communicate with the tap water supply system 29. If tap water is supplied from the tap water supply system 29 in this state, the tap water flows under pressure through the heat exchange pipe 27 of the second heating device 19, and on the other hand, the pipe line 47 → the second switching valve. 55 → circulation pump 44 → supplied to the bathtub 10 via the path of the water absorption hose 16 and, on the other hand, the pipe 33
→ first switching valve 43 → heat exchange tube 13 of first heating device 17 →
The water is supplied to the bathtub 10 via the path from the pipe 54 to the drain hose 18. That is, tap water is supplied in a form in which the microbial purification tank 40 and the electrolytic tank 38 are bypassed. At this time, the first
When the burners 11 and 25 of the heating device 17 and the second heating device 19 are ignited, the heated tap water is supplied to the bathtub 10 to fill the water. The water heating device 15 may ignite only the burner of either the first heating device 17 or the second heating device 19.

[0041]

As described above, according to the circulation purification apparatus of the first aspect of the present application, the microorganism purification means decomposes the organic matter contained in the contaminated liquid by the microorganisms to purify the liquid. By energizing the electrolysis means, the contaminated liquid is electrolyzed, active oxygen is generated and sterilized, and at the same time, the organic matter in the contaminated liquid is oxidatively decomposed. Since the microbial purification means and the electrolysis means work together to sterilize the contaminated liquid and decompose organic substances contained in the liquid, efficient cleaning of the contaminated liquid is achieved. Moreover, since the liquid heating means by the burner combustor is provided, there is an advantage that the purified liquid can be heated as needed to easily raise the temperature. Further, according to the circulation purification apparatus of the second aspect of the present application, in the microbial purification tank, the microorganisms present in the granular synthetic polymer gel decompose the organic matter contained in the contaminated liquid to purify the liquid. By energizing the electrolytic cell, the contaminated liquid is electrolyzed, active oxygen is generated and sterilized, and the organic matter in the contaminated liquid is oxidatively decomposed. The electrolytic cell and the microbial purification tank work together to sterilize the contaminated liquid and decompose organic substances contained in the liquid, thereby achieving efficient cleaning of the contaminated liquid. Moreover, since the liquid heating device using the burner combustor is provided, there is also an advantage that the temperature can be easily raised by heating the liquid if necessary.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a basic configuration of a circulation purification device according to a preferred embodiment of the present invention.

FIG. 2 is a schematic view of a circulation purification device according to another preferred embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a schematic structure of a microbial septic tank.

FIG. 4 is a vertical sectional view showing a schematic structure of an electrolytic cell.

FIG. 5 is a schematic perspective view showing a state in which a circulation purification device for polluted liquid according to the present application is installed in a bathroom.

FIG. 6 is a vertical cross-sectional view showing a water supply / drainage unit which constitutes a part of the circulation purification device, in a state where the water supply / drainage unit is attached to the inner wall surface of the bath.

FIG. 7 is a flowchart showing a control flow of the circulation purification device.

FIG. 8 is a schematic diagram showing a control block that can individually control electrical components of the circulation purification device.

FIG. 9 is a flowchart showing a flow of control for determining whether or not additional heating is performed when a bypass opening / closing valve is inserted in the water heating device.

FIG. 10 is a schematic explanatory diagram showing a mode in which a normal circulation purification operation is performed in a configuration including two heating devices as water heating devices.

FIG. 11 is a schematic explanatory view showing a bypass mode in which bath water is circulated without passing through each tank for circulation purification in the configuration shown in FIG.

FIG. 12 is a schematic explanatory view showing a filling mode in which the bath is filled without circulating purification in the configuration shown in FIG.

[Explanation of symbols]

 10 Bathtub 11 Gas Combustor (Burner) 12 Bath Water 13 Heat Exchange Tube 14 Water Supply / Drainage Unit 15 Water Heating Device 16 Water Absorption Hose 17 First Heating Device 18 Drain Hose 19 Second Heating Device 20 Device Main Body 21 Bypass Pipe 22 Electric Leak Breaker 23 No. 1 Closed Open Valve 24 Cable 25 Burner 26 Ground Cable 27 Heat Exchange Tube 28 Suction Cup 29 Water Supply System 30 Box Case 31 Hot Water Supply System 32 Water Intake Port 33 Pipeline 34 Discharge Port 35 Check Valve 36 Filter 37 Second Closed Open Valve 38 Electrolysis Tank 39 Electrolysis tank drive circuit 40 Microbial purification tank 41 Blower 43 First switching valve 44 Circulation pump 45 Pump drive circuit 46 Pipe line 47 Pipe line 48 Pipe line 49 Bypass pipe 50 Electric heating tank 53 Pipe line 54 Pipe line 55 Second switch valve 56 Flow rate sensor 58 Temperature sensor 59 Check valve 60 Water level sensor 2 Control Circuit 64 Box Casing 66,68 Electrode Section 70 Cylindrical Casing 70a Inlet 70b Outlet 72 Tubular Water Channel 74 Synthetic Polymer Gel (PVA Gel) 76 Filter 78 Water Retaining Section 89 Valve Drive Circuit 93 Burner Drive Circuit 94 Display 95 Display drive circuit 96 Ozonizer 97 Ozonizer drive circuit 98 Memory (RAM) 99 Solenoid valve

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location C02F 1/465 C02F 1/50 540A 1/50 510 550D 520 560A 531 560B 540 560F 550 560H 560 1 / 78 3/10 A F24H 9/00 W B01D 35/02 J 1/78 C02F 1/46 101Z 3/10 102 E04H 4/12 E04H 3/20 B F24H 9/00

Claims (16)

[Claims] 1. A circulation purification device for a contaminated liquid, wherein a liquid contaminated with time is stored in a liquid storage means, and the contaminated liquid is circulated and pumped outside the storage means for purification and sterilization. A microbial purification means for decomposing and purifying organic matter contained in the contaminated liquid by microorganisms, an electrolysis means for electrolyzing the contaminated liquid to promote oxidative decomposition of the organic matter, and a liquid including a burner combustor and a heat exchanger. A circulation purification device for a contaminated liquid, comprising: a heating means, wherein the microorganism purification means, the electrolysis means, and the liquid heating means are connected to form a circulation path for the contaminated liquid. 2. A contaminated liquid circulation purifying apparatus which pumps up a contaminated liquid in a storage tank with a circulation pump to purify and sterilize the contaminated liquid, and then returns the contaminated liquid to the storage tank again. A microbial septic tank filled with a granular synthetic polymer gel in which microorganisms for adsorbing and decomposing the contained organic matter are present, an electrolytic cell for electrolyzing this contaminated liquid to promote the oxidative decomposition of the organic matter, and a burner combustor And a liquid heating device provided with a heat exchanger, wherein the contaminated liquid circulation purification device is characterized in that the contaminated liquid circulation path is constituted by connecting the microbial purification tank, the electrolytic cell and the liquid heating device. 3. The circulating purifying apparatus for polluted liquid according to claim 2, wherein the filling amount of the synthetic polymer gel is adjusted so that the polluted liquid flowing into the microorganism purification tank can freely flow. 4. The circulating purification apparatus for contaminated liquid according to claim 2 or 3, wherein the synthetic polymer gel is entrapped with microorganisms that adsorb and decompose organic substances. 5. The microbial septic tank is provided with an inlet and an outlet for a contaminated liquid, and a mesh filter for preventing the granular synthetic polymer gel from flowing out is disposed in the inlet and the outlet. Item 5. A circulation purification device for contaminated liquid according to any one of items 2 to 4. 6. The inflow passage of the contaminated liquid to the electrolytic cell,
The circulation purification device for polluted liquid according to claim 2, further comprising a bypass flow path which is provided so as to communicate with the downstream side while avoiding the electrolytic cell. 7. The electrolytic cell is provided with two electrode portions, one electrode portion functions as an anode and the other electrode portion functions as a cathode. Circulation purification equipment for polluted liquids. 8. The two electrode parts in the electrolytic cell are capable of alternately switching their polarities according to the amount and time of passage of a contaminated liquid. The circulating purification apparatus for polluted liquid described. 9. The circulating purification device for contaminated liquid according to claim 2, wherein the liquid heating device is used for reheating the contaminated liquid. 10. The pollution according to claim 2, wherein the liquid heating device is composed of a first heating device for heating a contaminated liquid and a second heating device for heating tap water to supply it to a hot water supply system. Liquid circulation purification device. 11. The contaminated liquid reheated by the first heating device is always circulated through the microbial purification tank and the electrolysis tank and, if necessary, bypasses the microbial purification tank and the electrolysis tank. The circulating water may be heated by the second heating device and / or the first heating device when water is filled in the storage tank, and the tap water may be supplied to the storage tank as a contaminated liquid by bypassing the microbial purification tank and the electrolytic cell. The circulation purification apparatus for polluted liquid according to claim 2, wherein 12. The circulation purification device for polluted liquid according to claim 2, wherein the microorganism purification tank, the electrolytic cell, and the liquid heating device are sequentially arranged in a direction in which the contamination liquid is circulated. 13. The circulation purification device for polluted liquid according to claim 2, wherein the electrolytic cell, the microbial purification tank, and the liquid heating device are sequentially arranged in a direction in which the contamination liquid circulates. 14. A non-ignition system for the burner combustor, wherein a bypass pipe is connected to each of the pipeline systems connected to the liquid inflow side and the liquid outflow side of the liquid heating device, and an opening / closing valve is arranged in the bypass pipe. When the burner combustor is ignited, the on / off valve is opened and the purified contaminated liquid is circulated through both the bypass pipe and the liquid heating device. 3. The contaminated liquid circulation purification apparatus according to claim 2, wherein the contaminated liquid is circulated only through the liquid heating device, and the circulation pump is switched to a low speed operation. 15. A bypass pipe is branched from a pipe line system connected to a water inflow side of the liquid heating device, the bypass pipe is connected to a pipe line system connected to a water outflow side of the liquid heating device, and the bypass pipe is connected. A switching valve is provided at a branch portion of the pipe, and when the burner combustor is not ignited, the switching valve is switched to the bypass pipe side to allow purified contaminated liquid to flow only to the bypass pipe. When the combustor is ignited, the switching valve is switched to the water inflow pipe side of the liquid heating device so that the purified contaminated liquid is circulated only to the liquid heating device and the circulation pump is switched to a low speed operation. Item 2. The circulating purification apparatus for contaminated liquid according to Item 2. 16. The circulation purification device for polluted liquid according to claim 2, wherein an ozone generator is disposed at an appropriate position in a circulation route for polluted liquid which connects the microorganism purification tank and the electrolytic cell.