CN210528668U - Salt-free self-disinfection secondary water supply system - Google Patents
Salt-free self-disinfection secondary water supply system Download PDFInfo
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- CN210528668U CN210528668U CN201920717769.3U CN201920717769U CN210528668U CN 210528668 U CN210528668 U CN 210528668U CN 201920717769 U CN201920717769 U CN 201920717769U CN 210528668 U CN210528668 U CN 210528668U
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Abstract
The application provides a no salt is from disinfection type secondary water supply system belongs to the total water supply system technical field that is used for public or similar usage. Including chlorine residue detector, the inlet tube, receive the membrane device, the reverse osmosis membrane device, sodium hypochlorite generator and medicament pipe, chlorine residue detector carries out chlorine residue and detects to the water supply in the inlet tube, when chlorine residue concentration is greater than or equal to 0.1mg/L, the direct water supply network that gets into of water supply, when chlorine residue value < 0.1mg/L, water supply is in proper order through receiving the membrane device, the reverse osmosis membrane device handles the back, the clear water basin is sent into to qualified water through the reverse osmosis membrane device, water that does not pass through the reverse osmosis membrane device is sent to dense water tank, dense water tank is connected with sodium hypochlorite generator, communicate with the medicament pipe between sodium hypochlorite generator and the clear water basin, the water of dense water tank is handled through sodium hypochlorite generator, the effective chlorine that the electrolysis produced is sent into the clear water basin by. Has the advantages of avoiding the addition of medicament, reducing disinfection by-products, being safe and reliable, etc.
Description
Technical Field
The application relates to a salt-free self-disinfection secondary water supply system, belonging to the technical field of public or similar purpose total water supply systems.
Background
Along with the continuous acceleration of the urbanization process, the scale of cities is enlarged year by year, the water pressure of a water delivery pipe network cannot meet the requirement of long-distance water supply, and secondary water supply stations in various forms are produced. The secondary water supply is defined in urban water supply quality standard CJ/T206-2005, in which water supply units supply water from urban public water supplies and water from built facilities to users through water supply pipelines or dedicated pipelines after storage, pressurization or advanced treatment and sterilization. Common secondary water supply facilities include water storage tanks, water pumps, roof tanks, etc. in a community or building. Along with the lengthening of a water supply pipeline and the development of a secondary water supply system, the water quality pollution of secondary water supply becomes a new municipal water supply problem. According to the regulations of the factory water of drinking water in China, a certain amount of residual chlorine needs to be reserved in the factory water to ensure that a pipe network can be continuously sterilized in the water delivery process, and secondary pollution is avoided. After tap water enters a secondary water supply facility, because the retention time is prolonged, the water quality can be changed due to the secondary water supply facility or other external factors, and the general problems are that the bacterial indexes exceed the standard and the residual chlorine value is zero. The qualification rate of the non-sterilized secondary water supply is only 60 to 70 percent.
In order to ensure the safety of civil water, secondary water supply disinfection is an effective method for ensuring qualified secondary water supply. There are two conventional methods of treatment: 1) improving the residual chlorine concentration of the factory water, and 2) adding a chlorine-containing medicament again into the secondary water supply station. However, increasing the residual chlorine content in the factory water requires increased dosing of chlorine-containing agents, which produces more carcinogenic disinfection by-products. Meanwhile, the maximum content of residual chlorine in the factory water standard is limited by the maximum limit value, and the residual chlorine content required by long-distance water delivery cannot be completely met. The addition of the secondary water supply station will also introduce additional agents, thereby increasing the concentration of carcinogenic disinfection by-products in the produced water. The concentration of the disinfection by-products is definitely specified in the new drinking water standard GB5749-2006 of 2006 in China, wherein the limit value of the content of the trichloromethane is 0.06mg/L, and the limit value of the carbon tetrachloride is 0.002 mg/L. Therefore, the secondary water supply safety disinfection technology with less added medicament amount and less byproducts is an inevitable development trend for optimizing the secondary water supply safety.
SUMMERY OF THE UTILITY MODEL
In view of this, the present application provides a safe and reliable salt-free self-disinfection secondary water supply system that can successfully avoid the re-addition of chemicals, reduce disinfection by-products.
Specifically, the system is used for concentrating and electrolyzing inactive chlorine ions in water to be treated so as to generate effective chlorine and achieve the aim of disinfection.
In order to achieve the purpose, the technical scheme adopted by the application is as follows:
salt-free is from disinfection type secondary water supply system, through a plurality of filter equipment, with impurity, the divalent ion filtering in the water supply, the solution that the rest was used monovalent chloride ion and monovalent sodium ion to be given first place to is inputed sodium hypochlorite generator through the concentrated strong brine of reverse osmosis membrane device, produces sodium hypochlorite solution by sodium hypochlorite generator and carries out the secondary disinfection to supplying water.
Salt-free self-disinfection type secondary water supply system comprises a residual chlorine detector, a water inlet pipe, a nanofiltration membrane device, a reverse osmosis membrane device, a concentrated water pipe, a sodium hypochlorite generator and a medicament pipe, the residual chlorine detector carries out residual chlorine detection on water supply in the water inlet pipe, when residual chlorine concentration is more than or equal to 0.1mg/L, water supply directly enters a water supply network, when residual chlorine value is less than 0.1mg/L, water supply sequentially passes through the nanofiltration membrane device, the reverse osmosis membrane device handles the back, the clear water tank is sent into to through the qualified water of reverse osmosis membrane device, the water that does not pass through the reverse osmosis membrane device is sent to the concentrated water tank through the concentrated water pipe, the concentrated water tank is connected with the sodium hypochlorite generator, communicate with the medicament pipe between sodium hypochlorite generator and the clear water tank, the water of the concentrated water tank is handled through the sodium hypochlorite generator.
According to the scheme, a nanofiltration membrane device and a reverse osmosis membrane device are arranged on a water inlet pipe, the nanofiltration membrane device firstly blocks divalent ions in a water body and ensures that monovalent sodium ions and monovalent chloride ions can freely pass through the nanofiltration membrane device, and the first screening is completed; the produced water is light salt water mainly containing sodium ions and chloride ions; the fresh salt water is treated by the reverse osmosis membrane device, and sodium ions and chloride ions in the water cannot pass through the reverse osmosis membrane device, so that the water produced by the reverse osmosis membrane device is clean water and enters a clean water tank; the concentrated strong brine is changed into concentrated strong brine through a reverse osmosis membrane device; the strong brine is pressed into the sodium hypochlorite generator through the concentrated water pipe, effective chlorine is generated through electrolysis, then the strong brine is added into the clean water tank through the medicament pipe, and the effective residual chlorine is re-conveyed into the pipe network through the outlet water of the clean water tank. On the premise of ensuring the disinfection of the supplied water, the system does not need to additionally add medicine, reduces the generation of disinfection byproducts, realizes the activation and reutilization of inactivated chloride ions in the water body, and completes the self-sufficiency of the chloride ions.
On the basis of the scheme, the applicant sets a pretreatment for the whole water supply system, and determines a more preferable pretreatment setting as follows: and a multi-media filter is arranged along the water inlet pipe and is positioned in front of the nanofiltration membrane device.
The multi-medium filter preliminarily removes divalent ions such as calcium, magnesium and the like from a water body entering the water inlet pipe, softens water, removes the divalent ions in water, completes the pretreatment of the water body and reduces the treatment pressure of the nanofiltration membrane device and the reverse osmosis membrane device.
More preferably, the number of the multi-media filters is at least two, and the two multi-media filters are arranged on the water inlet pipe in series and are both positioned in front of the nanofiltration membrane device.
The multi-media filter is at least provided with two channels, and different water bodies are softened in different degrees, so that stable water quality when entering the nanofiltration membrane device and the reverse osmosis membrane device is ensured.
On the basis of the scheme, the applicant preferably sets up the nanofiltration membrane device as follows, the nanofiltration membrane device is provided with a secondary filter in a matching way, and the secondary filter is positioned in front of the nanofiltration membrane device and used for removing impurities from the water body.
The secondary filter is set as a pretreatment process, so that the treatment efficiency of the water body is improved, the treatment pressure of the nanofiltration membrane device, the reverse osmosis membrane device and the like is reduced, and the actual utilization value of the nanofiltration membrane device and the reverse osmosis membrane device is improved.
Therefore, more preferably, a multimedia filter and a secondary filter are arranged in front of the nanofiltration membrane device in a matching manner, the multimedia filter is arranged in front of the residual chlorine detector, and the secondary filter is arranged behind the residual chlorine detector.
The secondary filter preferably uses a cartridge filter to remove fine particles with turbidity of more than 1 degree, and prevent large particles such as grease from entering the subsequent processes such as a nanofiltration membrane device and a reverse osmosis membrane device.
On the basis of the scheme, the applicant makes the following preferable settings for the nanofiltration membrane device: the nanofiltration membrane device is provided with a nanofiltration high-pressure pump in a matching manner, so that the pressure regulation and control are realized, and the nanofiltration membrane device is matched with the efficient filtration of the nanofiltration membrane device for use.
On the basis of the scheme, the applicant makes the following preferable settings for the nanofiltration membrane device: the nanofiltration membrane device is also provided with a discharge pipe, and water which cannot pass through the nanofiltration membrane device is discharged as invalid electrolyte through the discharge pipe.
The nanofiltration membrane device is provided with two outlets, one outlet is connected to the reverse osmosis membrane device, and the water body passing through the nanofiltration membrane device is conveyed into the reverse osmosis membrane device for continuous post-treatment; another export is then connected invalid electrolyte delivery pipe, will not discharge through the waste water of receiving the filter membrane device, avoids the detention of too much waste water in receiving filter membrane device department, improves entire system's treatment effeciency.
On the basis of the scheme, the reverse osmosis membrane device is preferably set by the applicant as follows: the reverse osmosis membrane device is provided with the reverse osmosis high-pressure pump in a matched manner, and water permeates through the reverse osmosis membrane device by utilizing the pressure difference, so that the working efficiency of the reverse osmosis membrane device is improved.
On the basis of the scheme, the applicant further studies the sodium hypochlorite generator and determines the preferable setting as follows: and a booster pump is arranged between the concentrated water tank and the sodium hypochlorite generator to ensure that the water body of the concentrated water tank is smoothly discharged into the sodium hypochlorite generator.
The scheme provided by the applicant realizes micro-electrolysis continuous disinfection of urban secondary water supply, and generates effective chlorine to achieve disinfection effect by concentrating and electrolyzing inactive chloride ions stored in water. The treatment mode successfully avoids the re-addition of the medicament, reduces the generation of disinfection byproducts, is safer and more reliable to use in a secondary water supply system, and is more favorable for the health of residents. The system can be used in the scene of secondary water supply, and has a large application space in places where medicaments are inconvenient to transport, such as rural drinking water supply stations in China and the like; makes an important contribution to solving the problem of water quality safety of drinking water in rural areas.
Drawings
FIG. 1 is a schematic flow diagram of the present application;
reference numbers in the figures: 1. a water inlet pipe; 11. a multi-media filter; 2. a secondary filter; 3. a nanofiltration membrane device; 31. a nanofiltration high-pressure pump; 32. a discharge pipe; 4. a residual chlorine detector; 5. a reverse osmosis membrane device; 51. a reverse osmosis high pressure pump; 52. a water concentration pipe; 6. a clean water tank; 7. a sodium hypochlorite generator; 71. a drug tube; 72. a booster pump; 8. a concentrated water tank.
Detailed Description
In the water inlet treatment process, through multi-stage filtration, after divalent ions in a water body to be treated are removed, the water body is sent to a concentration process; the concentration process is provided with a reverse osmosis membrane device 5, a concentrated water tank 8 and a clean water tank 6, the reverse osmosis membrane device 5 separates monovalent chloride ions and monovalent sodium ions, water without monovalent ions is sent into the clean water tank and can be used as produced water to be conveyed to a user side after being disinfected, and water with monovalent chloride ions and monovalent sodium ions is sent into the concentrated water tank 8; be provided with sodium hypochlorite generator 7 in the electrolysis disinfection process, sodium hypochlorite generator 7 sets up in the exit of concentrated water tank 8, communicates with medicament pipe 71 between sodium hypochlorite generator 7 and the clean water basin 6, and monovalent chloride ion electrolysis turns into effective chlorine in the concentrated water tank, sends to the clean water basin 6 in, realizes the self-sterilizer of system secondary water supply.
As a specific operation mode, the self-sterilization method can be implemented in a self-sterilization system having the following structure: this self-disinfection system includes inlet tube 1, receive filter membrane device 3, reverse osmosis membrane device 5, condenser pipe 52, sodium hypochlorite generator 7 and medicament pipe 71, receive filter membrane device 3, reverse osmosis membrane device 5 sets gradually on inlet tube 1's pipeline, receive water after filter membrane device 3 handles and send into reverse osmosis membrane device 5, after reverse osmosis membrane device 5 handles, qualified water through reverse osmosis membrane device 5 sends into clean water basin 6, water that does not pass through reverse osmosis membrane device sends to dense water tank 8 through condenser pipe 52, dense water tank 8 is connected with sodium hypochlorite generator 7, communicate with medicament pipe 71 between sodium hypochlorite generator 7 and the clean water basin 6, the water of dense water tank 8 is handled through sodium hypochlorite generator 7, the effective chlorine that the electrolysis produced is sent into clean water basin 6 by medicament pipe 71, realize the self-disinfection of entire system water promptly.
In the scheme, a nanofiltration membrane device 3 and a reverse osmosis membrane device 5 are arranged on a water inlet pipe 1, the nanofiltration membrane device 3 preferably selects a divalent ion high rejection rate nanofiltration membrane device of 4 inches or eight inches, the nanofiltration membrane device 3 can be connected in a plurality of series connection modes, divalent ions in a water body are blocked firstly, monovalent sodium ions and monovalent chloride ions can be guaranteed to pass through freely, and the first screening is completed; the produced water is light salt water mainly containing sodium ions and chloride ions; then, the dilute brine is treated by a reverse osmosis membrane device 5, and the reverse osmosis membrane device 5 can also be arranged in a plurality of series connection modes. Sodium ions and chloride ions in the water cannot pass through the reverse osmosis membrane device 5, so that the produced water passing through the reverse osmosis membrane device 5 is clean water and enters the clean water tank 6; the salt water blocked by the reverse osmosis membrane device 5 is concentrated strong brine; the concentrated brine is directly pressed into the sodium hypochlorite generator 7 through the concentrated water pipe 52, or is firstly pressed into the concentrated water tank 8, then is pressed into the sodium hypochlorite generator 7 after being kept stand by the concentrated water tank 8, the yield of the effective chlorine is 5-10g/h, the effective chlorine is generated through electrolysis of the sodium hypochlorite generator 7, then is added into the clean water tank 6 through the medicament pipe 71, and the effective residual chlorine is conveyed into the pipe network again through the water outlet of the clean water tank 6. On the premise of ensuring the disinfection of the supplied water, the system does not need to additionally add medicine, reduces the generation of carcinogenic disinfection byproducts, realizes the activation and reutilization of inactivated chloride ions in the water body, and completes the self-sufficiency of the chloride ions.
On the basis of the above case, the nanofiltration membrane device can be matched in the following way:
the nanofiltration membrane device 3 is provided with a secondary filter in a matching way, and the secondary filter is positioned in front of the nanofiltration membrane device 3 to remove impurities from the water body. The secondary filter is set as a pretreatment process, so that the treatment efficiency of the water body is improved, the treatment pressure of the nanofiltration membrane device 3, the reverse osmosis membrane device 5 and the like is reduced, and the actual utilization value of the nanofiltration membrane device 3 and the reverse osmosis membrane device 5 is improved. The secondary filter preferably uses a security filter with large flux and 5-micron cut-off pore diameter to remove fine particles with turbidity of more than 1 degree, and prevent large particles such as grease and the like from entering the subsequent processes such as the nanofiltration membrane device 3, the reverse osmosis membrane device 5 and the like.
A multi-media filter 11 is arranged along the water inlet pipe 1, and the multi-media filter 11 is positioned in front of the nanofiltration membrane device 3. The multi-media filter 11 preliminarily removes large-particle impurities from the water body entering the water inlet pipe 1, completes the pretreatment of the water body, and reduces the treatment pressure of the nanofiltration membrane device 3 and the reverse osmosis membrane device 5. The multi-medium filter 11 is preferably provided with a plurality of (e.g. two) multi-medium filters 11, and the plurality of multi-medium filters 11 are arranged on the water inlet pipe 1 in series and are all positioned in front of the nanofiltration membrane device 3. The multi-medium filter 11 is provided with at least two channels to ensure stable water quality when entering the nanofiltration membrane device 3 and the reverse osmosis membrane device 5.
On the basis of the scheme, the nanofiltration membrane device 3 is provided with the nanofiltration high-pressure pump 31 in a matching way, so that the regulation and control of pressure are realized, and the efficient filtration of the nanofiltration membrane device 3 is matched.
On the basis of the above scheme, nanofiltration membrane device 3 is provided with two exports, an exit linkage to reverse osmosis membrane device 5, and another export is provided with discharge pipe 32, will not be able to pass through nanofiltration membrane device 3's water through discharge pipe 32 as waste water discharge. At the moment, the nanofiltration membrane device 3 forms two outlets, one outlet is connected to the reverse osmosis membrane device 5, and the water body passing through the nanofiltration membrane device 3 is conveyed to the reverse osmosis membrane device 5 for continuous post-treatment; the other outlet is connected with the discharge pipe 32, so that the waste water which cannot pass through the nanofiltration membrane device 3 is discharged, the retention of excessive waste water at the nanofiltration membrane device 3 is avoided, and the treatment efficiency of the whole system is improved.
On the basis of the scheme, the reverse osmosis membrane device 5 is provided with the reverse osmosis high-pressure pump 51 in a matching manner, so that the regulation and control of pressure are realized, and the efficient permeation of the reverse osmosis membrane device 5 is matched.
On the basis of the scheme, a booster pump 72 is arranged between the concentrated water tank 8 and the sodium hypochlorite generator 7 to ensure that the water body of the concentrated water tank 8 is smoothly discharged into the sodium hypochlorite generator 7.
A residual chlorine detector 4 can be arranged between the multi-medium filter and the secondary filter, residual chlorine detection is carried out on the supplied water by the residual chlorine detector 4, and when the concentration of the residual chlorine is more than or equal to 0.1mg/L, the supplied water directly enters a water supply pipe network (water supply tank) of a clean water tank 6 for use; when the residual chlorine value is less than 0.1mg/L, the water body to be treated is put into a water supply network after three processes of water inlet treatment, concentration and electrolytic disinfection in sequence.
The scheme provided by the applicant realizes micro-electrolysis continuous disinfection of urban secondary water supply, and generates effective chlorine to achieve disinfection effect by concentrating and electrolyzing inactive chloride ions stored in water. The treatment mode successfully avoids the re-addition of the medicament, reduces the generation of disinfection byproducts, is safer and more reliable to use in a secondary water supply system, and is more favorable for the health of residents. The system can be used in the scene of secondary water supply, and has a large application space in places where medicaments are inconvenient to transport, such as rural drinking water supply stations in China and the like; makes an important contribution to solving the problem of water quality safety of drinking water in rural areas.
The technical problem to be solved by the application is how to effectively utilize original chloride ions in source water, electrolyze to generate effective chlorine and finish the disinfection of water. The system provided by the present case comprises a water inlet treatment area, a concentration area and an electrolytic disinfection area which are respectively formed by the following components: the water inlet treatment area comprises a multi-medium filter 11, a (safety) secondary filter, a nanofiltration booster pump 31 and a nanofiltration membrane device 3, and the main purposes of the water inlet treatment area are to soften water quality and remove impurities and divalent ions in water, so that the water inlet can meet the water quality requirement of entering the concentration area; the concentration zone comprises a reverse osmosis booster pump 51, a reverse osmosis membrane device 5, a clean water tank 6 and a concentrated water tank 8, the concentration of chloride ions in water is completed in the zone, wherein reverse osmosis concentrated water enters the electrolytic disinfection zone for further treatment; the electrolytic disinfection area comprises a booster pump 72 and a sodium hypochlorite generator 7, generates effective disinfectant through electrolysis of the concentrated brine, conveys the disinfectant to the clean water tank 6, and then inputs a water supply network to complete disinfection.
Effect
The implementation effect of the technical scheme of the application is mainly embodied in the following aspects:
(1) the problem of inconvenient transportation and storage of medicaments in a secondary water supply station and a rural water supply station is solved;
(2) the disinfection problem of secondary water supply and rural water supply is solved, and the threat of bacterial pollution in water to the health of people is reduced;
(3) the existing chloride ions in the water are utilized for disinfection, so that the secondary addition of a disinfectant is successfully avoided, the generation of carcinogenic disinfection byproducts is reduced, and the health of users is facilitated;
(4) the application of the membrane technology in secondary water supply enables the equipment cost to be controllable, and has practical application significance.
Claims (9)
1. Salt-free self-disinfection secondary water supply system, its characterized in that: including chlorine residue detector, the inlet tube, receive the membrane device, the reverse osmosis membrane device, sodium hypochlorite generator and medicament pipe, chlorine residue detector carries out chlorine residue and detects to the water supply in the inlet tube, when chlorine residue concentration is greater than or equal to 0.1mg/L, the direct water supply network that gets into of water supply, when chlorine residue value < 0.1mg/L, water supply is in proper order through receiving the membrane device, the reverse osmosis membrane device handles the back, the clear water basin is sent into to qualified water through the reverse osmosis membrane device, water that does not pass through the reverse osmosis membrane device is sent to dense water tank, dense water tank is connected with sodium hypochlorite generator, communicate with the medicament pipe between sodium hypochlorite generator and the clear water basin, the water of dense water tank is handled through sodium hypochlorite generator, the effective chlorine that the electrolysis produced is sent into the clear water basin by.
2. The salt-free self-disinfecting secondary water supply system according to claim 1, characterized in that: the nanofiltration membrane device is matched with a nanofiltration high-pressure pump.
3. The salt-free self-disinfecting secondary water supply system according to claim 1, characterized in that: the reverse osmosis membrane device is provided with a reverse osmosis high-pressure pump in a matching way.
4. The salt-free self-disinfecting secondary water supply system according to claim 1, characterized in that: and a booster pump is arranged between the concentrated water tank and the sodium hypochlorite generator.
5. The salt-free self-disinfecting secondary water supply system according to any one of claims 1 to 4, wherein: and a multi-media filter and a secondary filter are arranged in front of the nanofiltration membrane device in a matching manner, the multi-media filter is arranged in front of the residual chlorine detector, and the secondary filter is arranged behind the residual chlorine detector.
6. The salt-free self-disinfecting secondary water supply system according to claim 5, characterized in that: the multi-media filter is at least provided with two, and two multi-media filters are connected in series and are arranged on the water inlet pipe and are positioned in front of the nanofiltration membrane device.
7. The salt-free self-disinfecting secondary water supply system according to claim 5, characterized in that: the secondary filter uses a cartridge filter.
8. The salt-free self-disinfecting secondary water supply system according to any one of claims 1 to 4, wherein: and a multi-media filter and a secondary filter are arranged in front of the nanofiltration membrane device in a matched manner and are arranged on the water inlet pipe.
9. The salt-free self-disinfecting secondary water supply system according to claim 8, wherein: the multi-media filter is arranged in plurality, and the multi-media filters are arranged on the water inlet pipe in series and are all positioned in front of the filter; the secondary filter uses a cartridge filter and is positioned between the nanofiltration membrane device and the multi-media filter.
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| CN201920717769.3U CN210528668U (en) | 2019-05-20 | 2019-05-20 | Salt-free self-disinfection secondary water supply system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112263202A (en) * | 2020-10-23 | 2021-01-26 | 珠海格力电器股份有限公司 | Dish washing machine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112263202A (en) * | 2020-10-23 | 2021-01-26 | 珠海格力电器股份有限公司 | Dish washing machine |
| CN112263202B (en) * | 2020-10-23 | 2022-02-25 | 珠海格力电器股份有限公司 | Dish washing machine |
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