Water purification system

Abstract

To provide an advanced clean water in general and a stable supply of clean water and water for domestic use even in an emergency.SOLUTION: A water purification system includes a raw water supply part 11 that contains at least groundwater, a clean water supply channel 61 that supplies clean water from the first reverse osmosis membrane system 21 to the second reverse osmosis membrane system 51, a first outlet channel 121 through which clean water from the first reverse osmosis membrane system flows, a second outlet channel 122 through which concentrated water from the first reverse osmosis membrane system flows, solenoid valves 123a, b (connection / disconnection means) that normally shut off the first outlet flow path and connect in an emergency, water pump solenoid valves 124a, b (connection / disconnection means) that normally shut off the second outlet flow path and connect in an emergency, a water pump 62 (clean water supply path connection / disconnection means) that normally connects the clean water supply path and shut off in an emergency, and a private power generation system 131 that supplies power to electrical equipment installed in the part between the raw water supply part and the clean water supply path.SELECTED DRAWING: Figure 2

Description

【Technical Field】 【0001】 The present invention relates to an improved technology for water purification equipment. 【Background Art】 【0002】 As water purification equipment, for example, the technology described in Japanese Patent No. 6235409 (Patent Document 1) is known. The technology described in Patent Document 1 has a water purification device that separates water meeting tap water quality standards, such as tap water, into purified water and concentrated water, and a water storage tank that takes in concentrated water and rainwater, and when city water is not supplied to the water purification device, water is supplied from the water storage tank to the water purification device. 【Prior Art Documents】 【Patent Documents】 【0003】 【Patent Document 1】 Japanese Patent No. 6235409 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0004】 In recent years, there has been a demand to supply users with purified water of higher quality than conventional water purification devices during normal use to improve user satisfaction. On the other hand, in an emergency such as an earthquake, there is a demand to stably supply both drinking water that ensures the minimum quality that can be drunk by users and domestic water used for non-drinking domestic purposes. However, in the conventional water purification equipment as described above, all of these requirements cannot be satisfied, and there is room for improvement. 【0005】 In view of the above situation, an object of the present invention is to provide a system that can supply users with cleaner water that is more advanced than conventional water purification devices under normal circumstances and can stably supply clean water and domestic water even in an emergency. Another object is to provide a system that can supply both drinking water and domestic water for non-drinking purposes while suppressing the operation of the water purification equipment in an emergency. 【Means for Solving the Problems】 【0006】 For this purpose, the water purification system according to the present invention includes: a raw water supply unit containing at least groundwater; a first separation unit that receives raw water from the raw water supply unit, separates purified water from the raw water, and discharges the remaining concentrated water; a second separation unit that receives purified water from the first separation unit and separates more highly purified water from the purified water; a purified water supply channel that supplies purified water from the first separation unit to the second separation unit; a first outlet channel through which purified water from the first separation unit flows; and a second channel through which concentrated water from the first separation unit flows. The system comprises two outlet channels, a first outlet channel disconnection means provided in the first outlet channel which normally shuts off the first outlet channel and opens it in an emergency, a second outlet channel disconnection means provided in the second outlet channel which normally shuts off the second outlet channel and opens it in an emergency, a clean water supply channel disconnection means provided in the clean water supply channel which normally opens the clean water supply channel and shuts it off in an emergency, and a private power generation facility which supplies power to drive electrical equipment installed in the section from the raw water supply unit to the first and second outlet channels. Normally, the power required for operation, which cannot be covered by the private power generation equipment alone, is supplied by power from the local power company's transmission lines. In the event of an emergency when power from the transmission lines is interrupted, the private power generation equipment is configured to supply power for operation to the electrical equipment installed in the section from the raw water supply unit to the first and second outlet channels. ru. 【0007】 According to the present invention, since it is equipped with first and second separation devices, it is possible to supply users with high-quality purified water under normal circumstances, thereby increasing user satisfaction. Furthermore, since the present invention is equipped with a raw water supply unit including groundwater and a private power generation facility, even in the event of an emergency when lifelines such as tap water and electricity are shut down, it is possible to produce purified water and concentrated water from groundwater to secure drinking water and water for daily use for users. In particular, in a water purification system in which the first and second separation devices normally work together to produce highly purified water, in the event of an emergency, the second separation device can be stopped to suppress power consumption while the first separation device produces purified water and concentrated water. The raw water may include tap water or river water. The mechanism for circulating water within the water purification system is not particularly limited, but may be, for example, a water pump driven by an electric motor, or a structure in which water flows from top to bottom by its own gravity. The first and second separation devices may be, for example, a reverse osmosis (RO) membrane device, an EDI (Electro Deionization) device, or other types of purified water extraction devices. 【0008】 The means for determining whether the situation is normal or abnormal (emergency) are not particularly limited and may be operated manually by water treatment plant workers, but preferably the emergency situation is determined automatically without human intervention. In a preferred aspect of the present invention, the system further comprises an emergency detection means that outputs a signal in the event of an emergency, and a control unit that receives this signal and switches the clean water supply path disconnection means from a connected state to a disconnected state, and switches the first and second outlet flow path disconnection means from a disconnected state to a connected state. 【0009】 The emergency detection means continuously monitors the object to distinguish between normal and emergency situations and outputs a signal when an emergency is detected. In a preferred aspect of the present invention, the raw water supply unit is supplied with tap water from a water supply pipe, and the emergency detection means includes sensors that monitor the water pressure and / or flow rate of the water supply pipe and determine an emergency based on the water pressure and / or flow rate. According to this aspect, an abnormality in the water supply pipe can be detected to determine an emergency. In another aspect of the present invention, the emergency detection means is, for example, an ammeter, a power meter, or a seismometer. 【0010】 A more preferred aspect of the present invention is the provision of an indicator means for indicating that the first and second outlet channel disconnection means are in communication. In this aspect, in an emergency, users inside and outside the water purification facility can be notified that purified water and concentrated water are available. The indicator means is not particularly limited and may be a rotating light such as Patlite® or a website on the internet. The raw water supply unit may contain river water, but in a preferred aspect, the raw water supply unit may contain a well. In this aspect, a stable amount of raw water can be obtained. 【0011】 Private power generation equipment may utilize natural forces such as solar power or wind power, or it may utilize thermal power generation that drives a generator with fuel, etc., and the type of power generation is not limited, but preferably, private power generation equipment includes solar panels. [Effects of the Invention] 【0012】 Thus, according to the present invention, even in emergencies when lifelines are disrupted, drinking water and water for daily use can be supplied stably and continuously. [Brief explanation of the drawing] 【0013】 [Figure 1] This is a schematic diagram showing a water purification system that is one embodiment of the present invention. [Figure 2] This is a schematic diagram showing the operating status of the water purification system during an emergency. [Modes for carrying out the invention] 【0014】 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Figure 1 is a schematic overall view showing a water purification system according to one embodiment of the present invention. The water purification system of this embodiment is installed in a water purification facility 10. The water purification facility 10 comprises a raw water supply unit 11, a first reverse osmosis membrane device 21, a concentrated water tank 31, a purified water tank 41, a second reverse osmosis membrane device 51, a purified water supply line 61, a product water supply line 71, a product water tank 81, and a final supply line 91. Normally, highly purified water is produced from raw water by two-stage filtration using the first reverse osmosis membrane device 21 and the second reverse osmosis membrane device 51, which are connected in series. 【0015】 The raw water supply unit 11 includes a well 12, a raw water tank 13, and water supply channels 14 and 17. The lower end of water supply channel 14 is connected to a water pump 16 located at the bottom of the well 12, and the upper end of water supply channel 14 is connected to the raw water tank 13. Water supply channel 14 is connected to a chlorine tank 14c midway. The chlorine tank 14c stores chlorine components such as sodium hypochlorite aqueous solution or other disinfectants. A chlorine injection pump 14p is attached to the chlorine tank 14c. The chlorine injection pump 14p is driven by an electric motor and adds chlorine components to the raw water flowing through water supply channel 14. 【0016】 The raw water tank 13 is connected to a water supply pipe 15 that extends from the water supply network established by the local government or other relevant entity. The water supply pipe 15 supplies tap water that meets the prescribed water quality standards set forth by the Waterworks Act, etc., to the raw water tank 13. For this reason, the raw water tank 13 is usually filled with a mixture of groundwater and tap water. 【0017】 The water supply channel 17 connects the raw water tank 13 and the first reverse osmosis membrane device 21, supplying raw water from the raw water tank 13 to the first reverse osmosis membrane device 21. The water supply channel 17 is equipped with a water pump 18 and an activated carbon device 19. The water pump 18 flows water into the water supply channel 17. The activated carbon device 19 removes residual chlorine from the raw water. 【0018】 The first reverse osmosis membrane apparatus 21 is a filtration device equipped with a reverse osmosis membrane (RO membrane) and an electric pump, and extracts purified water from raw water by the action of the reverse osmosis membrane. The remaining concentrated water is stored in the concentrated water tank 31. The purified water is stored in the purified water tank 41. The first reverse osmosis membrane apparatus 21 may be an electro-regenerative ionization (EDI) apparatus, or an apparatus that includes EDI (e.g., an RO-EDI apparatus), or an apparatus that separates purified water from raw water by other methods such as distillation. 【0019】 The purified water supply channel 61 connects the first reverse osmosis membrane device 21, the purified water tank 41, and the second reverse osmosis membrane device 51. The second reverse osmosis membrane device 51 is similar to the first reverse osmosis membrane device 21 and extracts purified water with even higher purity (hereinafter also referred to as product water) from the purified water extracted by the first reverse osmosis membrane device 21. This embodiment has a second supply channel 63 that branches off from the purified water supply channel 61 between the purified water tank 41 and the water supply pump 62. The second supply channel 63 extends from the purified water tank 41 to the outlet end 65. A water supply pump 64 is attached to the second supply channel 63. The water supply pump 64 flows purified water into the second supply channel 63. A solenoid valve 123a is provided between the water supply pump 64 and the outlet end 65. When the water supply pump 64 is running and the solenoid valve 123a is open, the clean water flows to the outlet end 65 and is used as appropriate to wash the bottle 100. 【0020】 The product water supply line 71 connects the second reverse osmosis membrane device 51 and the product water tank 81. In the middle of the product water supply line 71, an ion exchange resin device 74 for pure water and an activated carbon filter 75 are attached. The activated carbon filter 75 removes chemical substances such as trace amounts of trihalomethane remaining in the water flowing through the product water supply line 71. Also, the product water supply line 71 connects to the mineral tank 72. Mineral components such as Ca and Mg are stored in the mineral tank 72. A mineral injection pump 73 is attached to the mineral tank 72. The mineral injection pump 73 is driven by an electric motor and adds mineral components to the highly purified water flowing through the product water supply line 71. 【0021】 The inlet end of the final supply line 91 is connected to the product water tank 81, and the outlet end 95 of the final supply line 91 is connected to the product bottle 100. A water supply pump 92, an ultraviolet device 93, and a hollow fiber membrane device 94 are provided at an intermediate location in the final supply line 91. The ultraviolet device 93 irradiates ultraviolet rays to the product water before filling the bottle 100 for sterilization. The hollow fiber membrane device 94 sterilizes the product water flowing through the final supply line 91. 【0022】 The water supply pumps 16, 18, 62, and 64 described above are electrically connected to the control unit 110. The control unit 110 controls these pumps to be on / off. Also, the control unit 110 is electrically connected to the chlorine injection pump 14p and the mineral injection pump 73, and drives these pumps to add additives to the water described above. Further, the control unit 110 is electrically connected to the first reverse osmosis membrane device 21 and the second reverse osmosis membrane device 51, and controls the operating states of these devices. 【0023】 The operation of the normal water purification equipment 10 will be described. 【0024】 The normal water flow is shown by the thick line in Figure 1. The raw water supply unit 11 supplies raw water to the first reverse osmosis membrane device 21. The water pump 16 of the raw water supply unit 11 is driven by an electric motor. The water supply pipe 15 of the raw water supply unit 11 includes an on / off switch 15v, which regulates the flow rate. The on / off switch 15v is electrically connected to the control unit 110, and the opening degree is adjusted by the control unit 110. Alternatively, the opening degree of the on / off switch 15v can be adjusted manually by an operator. 【0025】 The groundwater (raw water) pumped from the well 12 by the water pump 16 and flowing through the water supply channel 14 is subject to daily pumping limits due to the well 12's own water output capacity and relevant laws and regulations. However, since tap water (raw water) is also supplied through the water supply pipe 15, a sufficient supply of raw water is ensured. 【0026】 Raw water is filtered by a first reverse osmosis membrane device 21 to separate it into purified water and concentrated water. The purified water flows into the purified water tank 41, and the remaining concentrated water after the purified water has been extracted flows into the concentrated water tank 31. This embodiment includes a concentrated water supply passage 32 extending from the concentrated water tank 31 to the outlet end 33, and a water pump 34 and a solenoid valve 124a attached to a point along the concentrated water supply passage 32. The water pump 34 is driven by an electric motor (not shown). The water pump 34 on the inlet side of the concentrated water tank 31 and the solenoid valve 124a on the outlet side are controlled by a control unit 110. Normally, the water pump 34 is turned on and the solenoid valve 124a is opened, and concentrated water is pumped out of the concentrated water tank 31 and flows through the concentrated water supply passage 32. The concentrated water taken out from the outlet end 33 is used as appropriate when washing the bottle 100. 【0027】 Normally, the purified water supply channel 61 supplies purified water from the purified water tank 41 to the second reverse osmosis membrane device 51. A water pump 62 installed in the purified water supply channel 61 flows purified water through the channel. The purified water is filtered in the second reverse osmosis membrane device 51 to extract highly purified water. This highly purified water is supplied from the second reverse osmosis membrane device 51 to the product water tank 81 via the product water supply channel 71. During this supply process, the product water passes sequentially through an ion exchange resin device 74 and an activated carbon filter 75, and then minerals are added by a mineral injection pump 73. 【0028】 The water pump 92 in the final supply line 91 draws highly purified water from the product water tank 81 and fills the product bottles 100. Multiple product bottles 100 are prepared and filled one by one or in batches sequentially by the final supply line 91 and shipped outside the water purification facility 10. In this embodiment, tap water and groundwater are secured as water sources, so there is sufficient production capacity for filling the product bottles 100. Normally, the water purification facility 10 is supplied with electricity from the private power generation equipment 131, which will be described later, and drives the electrical equipment installed in the entire section from the raw water supply unit 11 to the final supply line 91, specifically the water pumps 16, 18, 62, 92, the first reverse osmosis membrane device 21, the second reverse osmosis membrane device 51, the control unit 110, the emergency detection means 129, the chlorine injection pump 14p, the mineral injection pump 73, and all other electrical equipment not shown. Furthermore, any electricity that cannot be supplied by the private power generation equipment 131 alone is supplied from the local power company's transmission lines 141. 【0029】 Next, I will explain the system for producing purified water in emergencies. 【0030】 Figure 2 is a schematic overall diagram showing the water flow in an emergency in a water purification facility, indicated by thick lines. In addition to the control unit 110 and solenoid valves 123a and 124a described above, the water purification system of this embodiment includes a first outlet channel 121, a second outlet channel 122, solenoid valves 123b and 124b, an emergency detection means 129, a private power generation equipment 131, and a rotating light 135. 【0031】 The first outlet channel 121 branches off from a point 120 in the second supply channel 63 between the water pump 64 and the outlet end 65, extends to the outlet faucet 127, and carries the clean water from the first reverse osmosis membrane device 21. The solenoid valve 123b is installed in the middle of the first outlet channel 121. 【0032】 The control unit 110 controls solenoid valves 123a and 123b in coordination. Specifically, solenoid valve 123a is opened and solenoid valve 123b is closed, and the first outlet flow path 121 is shut off. Alternatively, solenoid valve 123a is closed and solenoid valve 123b is opened, and the first outlet flow path 121 is opened to connect the clean water tank 41 and the outlet tap 127, allowing clean water to flow. 【0033】 In other words, solenoid valves 123a and 123b function as means for opening or closing the first outlet passage 121. Normally, the first outlet passage 121 is closed. As a modified example not shown, solenoid valves 123a and 123b may be manual valves, three-way valves, or water pumps that turn water supply on / off. The first outlet passage 121 may be a pumping type or a flowing type using a water pump. 【0034】 In this embodiment, a chlorine tank 125 is connected in the middle of the first outlet channel 121. A chlorine injection pump 125p is attached to the chlorine tank 125. The chlorine injection pump 125p is driven by an electric motor and adds a small amount of chlorine to the clean water flowing through the first outlet channel 121. 【0035】 The second outlet channel 122 branches off from the concentrated water supply channel 32 at a point between the water pump 34 and the outlet end 33, extends to the outlet tap 126, and carries concentrated water from the first reverse osmosis membrane device 21. The solenoid valve 124b is installed at a point along the second outlet channel 122. 【0036】 The control unit 110 controls solenoid valves 124a and 124b in coordination. Specifically, solenoid valve 124a is opened and solenoid valve 124b is closed, and the second outlet passage 122 is shut off. Alternatively, solenoid valve 124a is closed and solenoid valve 124b is opened, and the second outlet passage 122 is opened to connect the concentrated water tank 31 and the outlet tap 126, allowing concentrated water to flow. 【0037】 In other words, solenoid valves 124a and 124b function as means for connecting or disconnecting the second outlet passage 122, thereby opening or closing it. Normally, the second outlet passage 122 is closed. As a modified example not shown, solenoid valves 124a and 124b may be manual valves, three-way valves, or even water pumps that turn water supply on and off. The second outlet passage 122 may also be of the pumping type or the flow type, similar to the first outlet passage 121. 【0038】 The emergency detection means 129 includes a sensor that constantly monitors the condition of the water supply pipe 15. If the water pressure in the water supply pipe 15 falls below a predetermined value, and / or if the flow rate in the water supply pipe 15 falls below a predetermined value even though the on / off switch 15v (pressure switch or flow rate switch) is open, the emergency detection means 129 detects such an abnormality and outputs a signal to the control unit 110 to indicate that an emergency has occurred. The control unit 110 receives the signal and stops the water supply pump 62, cutting off the supply of clean water from the clean water supply passage 61 to the second reverse osmosis membrane device 51. The control unit 110 also stops the pumps downstream of the second reverse osmosis membrane device 51 (mineral injection pump 73, water supply pump 92). Furthermore, the control unit 110 opens and closes the solenoid valves 123a, 123b, 124a, and 124b to connect the first outlet passage 121 and the second outlet passage 122. When the situation changes from normal to emergency, the control unit 110 switches the clean water supply path 61 from a connected state to a disconnected state, and switches the first outlet path 121 and the second outlet path 122 from a disconnected state to a connected state. As a variation, the emergency detection means may be a seismometer, or an ammeter and / or voltmeter that monitors the power supply from the local power lines 141 to the water purification facility 10. 【0039】 The rotating light 135 is electrically connected to the control unit 110. The control unit 110 illuminates the rotating light 135 while the first outlet channel 121 and the second outlet channel 122 are in communication. The rotating light 135 is a display means that indicates to the user that purified water and concentrated water can be supplied. 【0040】 The private power generation equipment 131 is electrically connected to the control unit 110 and supplies power to the water purification system. The private power generation equipment 131 includes a solar panel 132, a power conditioner 133, and a storage battery 134. Under normal and emergency conditions, the solar panel 132 generates power which is then regulated by the power conditioner 133 to charge the storage battery 134. In an emergency, the control unit 110 uses the storage battery 134 to operate the water purification system. In a modified example not shown, the private power generation equipment 131 may be equipment that generates power from wind or other natural forces. 【0041】 In the event of an emergency where the water supply and / or electricity infrastructure is shut down, such as a major earthquake, the water supply pipes 15 and / or power lines 141 will cease their supply. In such an emergency, the section from the purified water supply line 61 to the final supply line 91 will be shut down, and bottles 100 will not be filled. Instead, in an emergency, the outlet tap 127 will be opened to supply purified water from the purified water tank 41 to users, and the outlet tap 126 will be opened to supply concentrated water from the concentrated water tank 31 to users. Furthermore, even if the water supply and electricity infrastructure is shut down for an extended period, raw water will be pumped from the well 12 to continuously supply purified and concentrated water. The purified water will be mainly used as drinking water, and the concentrated water will be mainly used as domestic water. In an emergency, the electrical equipment installed in the section from the raw water supply unit 11 to the first and second outlet channels 121 and 122 is powered by a private power generation facility 131 to drive the water pumps 16, 18, 34, 64, solenoid valves 123a, 123b, 124a, 124b, the first reverse osmosis membrane device 21, the control unit 110, the chlorine injection pump 125p, the emergency detection means 129, and other minimal electrical equipment (not shown). 【0042】 According to this embodiment, the entire section of the water purification equipment 10 from the raw water supply section 11 to the final supply line 91 is normally operated as shown by the thick line in Figure 1, and high-quality product water can be supplied from the outlet end 95 using the first reverse osmosis membrane device 21 and the second reverse osmosis membrane device 51 and filled into bottles 100. 【0043】 In contrast, in the event of an emergency where the water supply pipe 15 is shut down, as shown by the thick line in Figure 2, the production of product water can be stopped, and purified water can be supplied to the user from the outlet tap 127, and concentrated water can be supplied to the user from the outlet tap 126. 【0044】 According to this embodiment, in an emergency, the upstream side of the water purification equipment 10, i.e., the first reverse osmosis membrane device 21, is used, and the downstream side of the water purification equipment 10, i.e., the second reverse osmosis membrane device 51, is not used, which is beneficial when sufficient power cannot be secured. Furthermore, even if the water supply pipes 15 are shut down and sufficient raw water cannot be obtained, raw water can be obtained from the well 12 and purified water and concentrated water can be supplied to the user. 【0045】 Furthermore, according to this embodiment, a display means such as a rotating light 135 can inform users inside and outside the water purification facility 10 that purified water and concentrated water can be supplied. 【0046】 Although embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to the illustrated embodiments. Various modifications and variations can be made to the illustrated embodiments within the same scope as the present invention, or within an equivalent scope. [Industrial applicability] 【0047】 This invention can be advantageously utilized in production facilities and plants. [Explanation of symbols] 【0048】 10 Water purification equipment, 11 Raw water supply unit, 12 Wells, 15 Water supply pipes, 21 First reverse osmosis membrane apparatus, 31 Concentrated water tank, 41 Clean water tank, 51 Second reverse osmosis membrane device, 61 Clean water supply channel, 62 Water supply pump (clean water supply path disconnection means), 110 Control unit, 121 First outlet channel, 122 Second outlet channel, 123a, 123b Solenoid valve (first outlet flow path disconnection means), 124a, 124b Solenoid valve (second outlet flow path disconnection means), 126, 127 Outlet faucet, 129 Emergency detection means (sensor), 131 Private power generation equipment, 135 Rotating light (indicator).

Claims

[Claim 1] At least the raw water supply section, including groundwater, A first separation device that receives raw water from the raw water supply unit, separates purified water from the raw water, and discharges the remaining concentrated water, A second separation device is supplied with purified water from the first separation device and separates even more purified water from the purified water. A clean water supply path for supplying the clean water from the first separation device to the second separation device, A first outlet channel through which the purified water from the first separation device flows, A second outlet channel through which concentrated water from the first separation device flows, A first outlet channel disconnection means is provided in the first outlet channel, which normally blocks the first outlet channel and allows it to be opened in an emergency, A second outlet channel disconnection means is provided in the second outlet channel, which normally blocks the second outlet channel and allows it to be opened in an emergency, A means for disconnecting the clean water supply path is provided in the clean water supply path, which normally keeps the clean water supply path connected and disconnects it in an emergency. The system includes a private power generation facility that supplies power to drive electrical equipment installed in the section from the raw water supply unit to the first and second outlet channels, Normally, the power required for driving the vehicle, which cannot be supplied solely by the private power generation equipment, is supplied by electricity from the local power company's transmission lines. In the event of an emergency when power from the aforementioned power transmission line is interrupted, the water purification system is configured to use the private power generation equipment to supply power for driving electrical equipment installed in the section from the raw water supply unit to the first outlet channel and the second outlet channel. [Claim 2] Emergency detection means that outputs a signal in the event of an emergency, The water purification system according to claim 1, further comprising a control unit that receives the aforementioned signal and switches the clean water supply path disconnection means from a connected state to a disconnected state, and switches the first and second outlet path disconnection means from a disconnected state to a connected state. [Claim 3] The aforementioned raw water supply unit is supplied with tap water from the water supply pipe. The water purification system according to claim 2, wherein the emergency detection means includes a sensor that monitors the water pressure and / or flow rate of the water supply pipe, and determines an emergency based on the water pressure and / or flow rate. [Claim 4] The water purification system according to any one of claims 1 to 3, further comprising an indicator means for indicating that the first and second outlet channel disconnection means are in communication. [Claim 5] The water purification system according to any one of claims 1 to 4, wherein the raw water supply unit includes a well. [Claim 6] The water purification system according to any one of claims 1 to 5, wherein the aforementioned private power generation equipment includes solar panels.

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