An intelligent chlorine addition device for secondary water supply based on a shared low-range residual chlorine meter

Abstract

A secondary water supply intelligent chlorine addition device based on a shared low-range residual chlorine meter includes a stock liquid storage device, a sampling component, a dilution device, a dosing component, a monitoring device, and a control device; the stock liquid storage device is connected to the dilution device via the sampling component, the dilution device is connected to the water tank via the dosing component, the monitoring device is installed on the water tank and connected to the dilution device, and the control device is connected to the stock liquid storage device, the sampling component, the dilution device, the dosing component, and the monitoring device. The beneficial effects of the present invention are: avoiding the health risks that high-concentration sodium hypochlorite solution may bring to users, high accuracy, able to meet the need for accurately calculating the effective chlorine content of sodium hypochlorite stock solution, saving energy, and having a small size and easy installation, greatly saving the cost of chlorine addition equipment, reducing the difficulty of equipment maintenance, and being able to operate automatically; the entire monitoring, sampling, dilution, liquid addition, and dosing process are all carried out automatically, and maintenance is simple and convenient, with a very high degree of intelligence.

Description

Technical Field

[0001] The present invention relates to the field of secondary water supply of urban water supply pipe network system, and in particular to an intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter. Background Art

[0002] Currently, the vast majority of drinking water (commonly known as tap water) in Chinese cities is disinfected with chlorine-containing disinfectants. Adding chlorine-containing disinfectants to tap water maintains a sufficient residual chlorine concentration within the water supply network for extended periods, thereby ensuring that microbial contamination in the water remains within acceptable limits. Residual chlorine refers to the amount of available chlorine remaining in the water after a certain period of contact with the chlorine-containing disinfectant. Available chlorine is the equivalent of the oxidizing power of a specific amount of chlorine-containing disinfectant when reacting with an acid. It is used to measure the oxidizing power of chlorine-containing disinfectants. In practice, the oxidizing power of chlorine-containing disinfectants is expressed as the available chlorine content, typically in g / L. The oxidizing power of chlorine-containing disinfectants remaining in tap water is typically expressed as the residual chlorine concentration, typically in mg / L.

[0003] Secondary water supply refers to the water supply method that supplies water to users or for their own use through pipelines using storage, pressurization and other facilities when the water pressure and water volume requirements for drinking water in civil and industrial buildings exceed the capacity of urban public water supply or self-built water supply network. Secondary water supply facilities mainly include three parts: water storage equipment, pressurization equipment and pipelines. As the end of the urban water supply network system, secondary water supply storage equipment (hereinafter referred to as water tank) plays the role of the last barrier to ensure the safety of tap water quality. Tap water will stay in the water tank for a period of time. If the residence time is too long, the residual chlorine concentration may decay to a very low level, which will not effectively kill the microorganisms in the water, causing the microbial indicators of the tap water in the water tank to exceed the standard.

[0004] When the residual chlorine concentration in tap water in a water tank drops below a certain level, adding a certain amount of chlorine-containing disinfectant to the tank is an effective way to address this low residual chlorine concentration. This method is also known as chlorination. Commonly used chlorine-containing disinfectants include liquid chlorine, chloramines, and sodium hypochlorite. Liquid chlorine has very high requirements for transportation and storage conditions, making it unsuitable for unmanned, automated management in residential areas. Chloramines require a long contact time with tap water to achieve their disinfecting effect, making them unsuitable for end-of-pipeline disinfection. Sodium hypochlorite is the best choice for chlorination of tap water in water tanks. The sodium hypochlorite used can be produced on-site using a sodium hypochlorite generator or purchased as a finished sodium hypochlorite solution. There are many issues to consider when producing sodium hypochlorite on-site using a sodium hypochlorite generator. For example, how to solve the problem of excessive sodium hypochlorite production by the existing sodium hypochlorite generator, how to safely discharge the hydrogen generated during the electrolysis process, how to clean the electrolytic cell after scaling, how to solve the problem of waste liquid discharge from the pickling and scaling electrolytic cell, how to calculate the output of the electrolytic cell before it reaches stability after startup, how to ensure the stability of the output after the electrolytic cell has been used for a period of time, etc. However, using purchased sodium hypochlorite concentrate is much simpler and more convenient. However, the method of using finished sodium hypochlorite solution for chlorine supplementation also has certain difficulties in actual use: 1) Sodium hypochlorite solution is easy to decompose, and the effective chlorine content of the sodium hypochlorite solution will continue to decrease over time. Therefore, its effective chlorine content must be tested in time during use to accurately calculate the actual dosage. The effective chlorine content of commonly used sodium hypochlorite solution is extremely high, reaching 10 to 100 g / L. The only method to accurately measure this ultra-high concentration of effective chlorine is titration. Although online sodium hypochlorite probes for detecting ultra-high concentrations of effective chlorine have been put into use on the market, their The detection accuracy cannot meet the requirements of precise calculation. Only the detection accuracy of low-range online residual chlorine meters (the residual chlorine concentration of the tested solution is less than 2 mg / L) can meet the requirements of precise calculation. 2) Article 7 of the national standard GB28233-2011 "Safety and Hygiene Standard for Sodium Hypochlorite Generators" clearly stipulates that "the allowable concentration of sodium hypochlorite disinfectant for drinking water disinfection (calculated as available chlorine content) is 2 to 4 mg / L." Therefore, the finished sodium hypochlorite solution needs to be accurately diluted approximately 3,000 to 30,000 times before it can be used to disinfect tap water in the water tank.

[0005] The prior art with Chinese patent application number 2018112400111 disclosed a method and system for controlling secondary water supply chlorination with a composite loop on February 15, 2019. The method mainly adds sodium hypochlorite solution in proportion to the water inlet flow rate according to the default addition coefficient, and then adjusts the addition coefficient according to the residual chlorine concentration signal in the outlet water fed back from the outlet end after a period of time, and repeats the cycle. However, in actual application, the prior art still has the following defects: 1) There is no real-time detection of the effective chlorine content of the added sodium hypochlorite solution, and it is always calculated based on the effective chlorine content indicated at the time of purchase. This method will cause the sodium hypochlorite solution to decay after a period of time, resulting in a serious shortage of dosage, and the effectiveness of killing microorganisms in the water is greatly reduced; 2) The purchased sodium hypochlorite solution has a very high effective chlorine content (the effective chlorine content of 10% sodium hypochlorite solution is 100g / L), and it cannot be directly added to the water tank for use, because it takes a long time for the high-concentration sodium hypochlorite solution to mix with the tap water in the water tank after entering the water tank, and the tap water is Continuous use makes it easy for the added high-concentration sodium hypochlorite solution to be directly consumed by the user without being mixed, which may endanger the user's health; 3) High-concentration sodium hypochlorite solution may also corrode the water tank or connecting pipes due to its strong corrosiveness; 4) This technology only adjusts the speed of adding sodium hypochlorite solution, but sodium hypochlorite solution is always added. In practice, the residual chlorine concentration of tap water in the water tank is qualified in most cases and can ensure the safety of tap water. Therefore, in most cases, it is not necessary to add sodium hypochlorite solution to increase the residual chlorine concentration, which not only wastes sodium hypochlorite solution but also may endanger the health of users. Summary of the Invention

[0006] The purpose of the present invention is to provide a secondary water supply intelligent chlorine supplement device based on a shared low-range residual chlorine meter, which ensures the accurate dosage of sodium hypochlorite stock solution and saves costs.

[0007] The objective of the present invention is achieved through such a technical solution, a secondary water supply intelligent chlorine addition device based on a shared low-range residual chlorine meter, comprising a raw liquid storage device, a sampling component, a dilution device, a dosing component, a monitoring device and a control device; the raw liquid storage device is connected to the dilution device through the sampling component, the dilution device is connected to the water tank through the dosing component, the monitoring device is installed on the water tank and connected to the dilution device, and the control device is connected to the raw liquid storage device, the sampling component, the dilution device, the dosing component and the monitoring device.

[0008] Among them, the monitoring equipment is used to monitor the residual chlorine concentration and water level of tap water in the water tank, and is also used to detect the residual chlorine concentration of the sodium hypochlorite solution after being diluted by the dilution device; when the residual chlorine concentration of the tap water in the water tank is lower than the set value, the control device first dilutes a certain amount of sodium hypochlorite stock solution to the detectable range of the monitoring equipment, calculates the accurate effective chlorine content of the sodium hypochlorite stock solution based on the test results, and then controls the sampling component to add a certain amount of sodium hypochlorite stock solution to the dilution device, dilutes it into a sodium hypochlorite solution of the set concentration through the dilution device, and adds it to the water tank through the dosing device.

[0009] In the present invention, a low-range residual chlorine meter is used to monitor the residual chlorine concentration of tap water in the water tank. When chlorine needs to be added, the low-range residual chlorine meter is used to detect the sodium hypochlorite solution diluted to the measurable range by controlling the corresponding solenoid valve. The available chlorine content of the sodium hypochlorite stock solution is accurately calculated. Then, according to actual needs, a fixed amount of sodium hypochlorite stock solution is diluted to the usable concentration range and added to the water tank to increase the residual chlorine concentration of the tap water in the water tank, thereby continuously maintaining a sufficient residual chlorine concentration in the tap water in the water tank. This ensures the accurate amount of sodium hypochlorite stock solution used and saves costs.

[0010] Furthermore, the raw liquid storage device includes a raw liquid storage tank and a water level detection switch, and the water level detection switch is installed in the raw liquid storage tank and connected to the control device.

[0011] The sampling assembly further includes a sampling tube and a sampling pump mounted on the sampling tube. One end of the sampling tube is connected to the stock solution storage tank and the other end is connected to the dilution device. The sampling pump is mounted on the sampling tube and connected to the control device. The sampling assembly is used to add a fixed amount of sodium hypochlorite stock solution stored in the stock solution storage tank to the dilution device.

[0012] Furthermore, the dosing assembly includes a dosing pipe and a dosing pump arranged on the dosing pipe, one end of the dosing pipe is connected to the dilution device, and the other end is connected to the water tank. The dosing pump is installed on the dosing pipe and connected to the control device.

[0013] Furthermore, the dilution device includes a first dilution tank, a second dilution tank, a liquid adding pipe and a liquid adding pump. Water level switches are provided in the first dilution tank and the second dilution tank. The first dilution tank is connected to the raw liquid storage tank through a sampling pipe, and the second dilution tank is connected to the water tank through a dosing pipe. The two ends of the liquid adding pipe are respectively connected to the first dilution tank and the second dilution tank. The liquid adding pump is installed on the liquid adding pipe, and the liquid adding pump and the water level switch are both connected to the control device.

[0014] Furthermore, the dilution device also includes an agitator, which is installed in the dilution tank and connected to the control device.

[0015] Furthermore, the dilution device also includes a water adding component, which includes a water adding main pipe, a water adding pump, a first water adding branch pipe, a second water adding branch pipe, a first water adding solenoid valve and a second water adding solenoid valve; one end of the water adding main pipe is connected to the water tank, and the other end of the water adding main pipe is connected to the first dilution tank and the second dilution tank through the first water adding branch pipe and the second water adding branch pipe respectively; the water adding pump is installed on the water adding main pipe, and the first water adding solenoid valve and the second water adding solenoid valve are installed on the first water adding branch pipe and the second water adding branch pipe respectively; the water adding pump, the first water adding solenoid valve and the second water adding solenoid valve are all connected to the control device.

[0016] Furthermore, it also includes a drain pipe. An overflow pipe is provided on the upper side of the first dilution tank and the second dilution tank. One end of the overflow pipe is connected to the corresponding dilution tank, and the other end is connected to the drain pipe. The liquid inlet of the overflow pipe in the corresponding dilution tank is called an overflow port. In the first dilution tank, the overflow port of the overflow pipe must be located lower than the water outlet positions of the sampling tube and the first water adding branch pipe; in the second dilution tank, the overflow port of the overflow pipe must be located lower than the water outlet positions of the liquid adding pipe and the second water adding branch pipe.

[0017] Furthermore, the monitoring equipment includes a water level meter and a residual chlorine monitoring component, and the water level meter is installed in the water tank; the residual chlorine monitoring component includes a water inlet main, a first water inlet branch, a second water inlet branch, a residual chlorine meter, a first water inlet solenoid valve and a second water inlet solenoid valve; one end of the first water inlet branch and the second water inlet branch are both connected to the water inlet main, the other end of the first water inlet branch is connected to the water tank, and the other end of the second water inlet branch is connected to the second dilution tank, the residual chlorine meter is installed on the water inlet main, the first water inlet solenoid valve and the second water inlet solenoid valve are respectively installed on the first water inlet branch and the second water inlet branch, and the water level meter, the residual chlorine meter, the first water inlet solenoid valve and the second water inlet solenoid valve are all connected to the control equipment.

[0018] Furthermore, the control device includes an intelligent controller and a remote controller. The intelligent controller includes a data acquisition module, a data storage module, a data processing module, a control module and a communication module. The data acquisition module is respectively connected to the water level detection switch, the water level switch, the water level meter, the residual chlorine meter and the data storage module. The data storage module is also connected to the data acquisition module, the data processing module and the communication module. The data processing module is also respectively connected to the control module and the communication module. The control module is also respectively connected to the agitator, the sampling pump, the liquid adding pump, the water adding pump, the dosing pump, the first water adding solenoid valve, the second water adding solenoid valve, the first water diversion solenoid valve and the second water diversion solenoid valve. The communication module is also connected to the remote controller.

[0019] Furthermore, the raw liquid storage device, sampling component, dilution device, dosing component, residual chlorine monitoring component and intelligent controller are all installed in the box.

[0020] Due to the adoption of the above technical solution, the present invention has the following advantages:

[0021] 1. The present invention uses finished sodium hypochlorite to add chlorine, which is simple and easy to use and is particularly suitable for use in unattended places such as secondary water supply tanks;

[0022] 2. The present invention adopts a residual chlorine monitoring component with a specific structure, which can use a low-range online residual chlorine meter to detect the residual chlorine concentration of tap water in the water tank and the residual chlorine concentration of sodium hypochlorite solution diluted to the measurable range, greatly saving the cost of chlorine addition equipment;

[0023] 3. The present invention uses a dilution device to dilute the sodium hypochlorite stock solution to a concentration range that can be accurately detected by a low-range online residual chlorine meter with mature technology, and then calculates the available chlorine content of the sodium hypochlorite stock solution. The result is highly accurate and can ensure the need for accurate sampling of the sodium hypochlorite stock solution;

[0024] 4. The present invention uses a dilution device to dilute the sodium hypochlorite stock solution to a usable range before adding it into the water tank to increase the residual chlorine concentration of the tap water in the water tank, thereby avoiding the health risks that may be brought to users by directly using a high-concentration sodium hypochlorite solution;

[0025] 5. The present invention adopts a water adding component with a special structure to extract tap water from the water tank as dilution water, avoiding the trouble of providing additional water source;

[0026] 6. The present invention uses specially designed control equipment to integrate the stock solution storage device, sampling component, dilution device, dosing component and monitoring equipment, etc., to achieve automatic control. The entire device can automatically perform corresponding actions according to real-time information fed back from the site, realizing automatic control in an unmanned environment.

[0027] 7. The present invention installs the raw liquid storage device, sampling component, dilution device, dosing component, residual chlorine monitoring component and intelligent controller in the box, which is beneficial to provide protection for these devices and improves the safety of the device.

[0028] 8. The present invention uses a dilution device that works together with two dilution tanks with a volume of less than 40 ml, which can dilute the sodium hypochlorite stock solution by about 3000-30000 times. Compared with using only one dilution tank for dilution, the volume of the dilution tank is greatly saved (if one dilution tank is used, the volume of the dilution tank needs to be more than 1000 liters), which brings great convenience to production, transportation and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a functional schematic diagram of the present invention.

[0030] Figure 2 It is a structural schematic diagram of the present invention.

[0031] The following are marked in the figure: 1. stock liquid storage device, 2. sampling component, 3. dilution device, 4. dosing component, 5. water tank, 6. monitoring equipment, 7. control equipment, 8. stock liquid storage tank, 9. water level detection switch, 10. sampling tube, 11. sampling pump, 12. dosing tube, 13. dosing pump, 14. first dilution tank, 15. second dilution tank, 16. liquid adding tube, 17. liquid adding pump, 18. water level switch, 19. agitator, 20. water adding main pipe, 21. water adding pump, 22. first water adding branch pipe, 23. Second water supply branch pipe, 24. First water supply solenoid valve, 25. Second water supply solenoid valve, 26. Water level gauge, 27. Water diversion main pipe, 28. First water diversion branch pipe, 29. Second water diversion branch pipe, 30. Residual chlorine meter, 31. First water diversion solenoid valve, 32. Second water diversion solenoid valve, 33. Intelligent controller, 34. Remote controller, 35. Data acquisition module, 36. Data storage module, 37. Data processing module, 38. Control module, 39. Communication module, 40. Box, 41. Drain pipe, 42. Overflow pipe. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and examples.

[0033] Example 1

[0034] A secondary water supply intelligent chlorine replenishing device based on a shared low-range residual chlorine meter includes a raw liquid storage device 1, a sampling component 2, a dilution device 3, a dosing component 4, a monitoring device 6 and a control device 7; the raw liquid storage device is connected to the dilution device 3 through the sampling component 2, the dilution device 3 is connected to the water tank 5 through the dosing component 4, the monitoring device 6 is installed on the water tank 5 and connected to the dilution device 3, and the control device 7 is connected to the raw liquid storage device 1, the sampling component 2, the dilution device 3, the dosing component 4 and the monitoring device 6.

[0035] The monitoring device 6 is used to monitor the residual chlorine concentration and water level of the tap water in the water tank 5, and is also used to detect the residual chlorine concentration of the sodium hypochlorite solution after being diluted by the dilution device 3. When the residual chlorine concentration of the tap water in the water tank 5 is lower than the set value, the control device 7 first dilutes the fixed amount of sodium hypochlorite stock solution to the detectable range of the monitoring device, calculates the accurate effective chlorine content of the sodium hypochlorite stock solution based on the test results, and then controls the sampling component 2 to add the fixed amount of sodium hypochlorite stock solution to the dilution device 3, dilutes it into the set concentration of sodium hypochlorite solution by the dilution device 3, and adds it to the water tank through the dosing component 4.

[0036] In the present invention, a low-range residual chlorine meter is used to monitor the residual chlorine concentration of the tap water in the water tank. When chlorine needs to be added, the control device 7 controls the dilution device 3 to allow the low-range residual chlorine meter to detect the sodium hypochlorite solution diluted to the measurable range, thereby accurately calculating the available chlorine content of the sodium hypochlorite stock solution. Then, according to actual needs, a fixed amount of sodium hypochlorite stock solution is diluted to a usable concentration range and added to the water tank 5 to increase the residual chlorine concentration of the tap water in the water tank, thereby continuously maintaining a sufficient residual chlorine concentration in the tap water in the water tank 5. This ensures the accurate amount of sodium hypochlorite stock solution used and saves costs.

[0037] Furthermore, the raw liquid storage device 1 includes a raw liquid storage tank 8 and a water level detection switch 9. The water level detection switch 9 is installed in the raw liquid storage tank 8 and connected to the control device 7. The raw liquid storage tank 1 is used to store sodium hypochlorite raw liquid. When the liquid level of the sodium hypochlorite raw liquid in the raw liquid storage tank 8 drops to a set value, the water level detection switch 9 sends an alarm signal to the control device 7, indicating that the sodium hypochlorite raw liquid needs to be replenished.

[0038] Furthermore, the sampling assembly 2 is used to add a fixed amount of sodium hypochlorite stock solution stored in the stock solution storage tank 8 to the dilution device 3. It includes a sampling tube 10 and a sampling pump 11 disposed on the sampling tube 10. One end of the sampling tube 10 is connected to the stock solution storage tank 8 and the other end is connected to the dilution device 3. The sampling pump 11 is a fixed-volume pump installed on the sampling tube 10 and connected to the control device 7. The liquid inlet of the sampling tube 10 in the stock solution storage tank 8 should be close to its bottom, and the sampling tube 10 enters the dilution device 3 from the top or upper side.

[0039] Furthermore, the dosing assembly 4 is used to add a fixed amount of sodium hypochlorite solution diluted to a set concentration range into the water tank 5. It includes a dosing pipe 12 and a dosing pump 13 mounted on the dosing pipe 12. One end of the dosing pipe 12 is connected to the dilution device 3, and the other end is connected to the water tank 5. The dosing pump 13 is a fixed-flow pump mounted on the dosing pipe 12 and connected to the control device 7. The liquid inlet of the dosing pipe 12 in the dilution device 3 should be close to the bottom thereof, and the dosing pipe 12 enters the water tank 5 from the top or upper side.

[0040] Furthermore, the dilution device 3 is used to dilute the sodium hypochlorite stock solution to a concentration range detectable by the residual chlorine meter for detection or to a set concentration range for direct addition to the water tank 5 for use. It includes a first dilution tank 14, a second dilution tank 15, a liquid addition pipe 16, and a liquid addition pump 17. A water level switch 18 is provided in both the first dilution tank 14 and the second dilution tank 15. The first dilution tank 14 is connected to the stock solution storage tank 8 via a sampling pipe 10, and the second dilution tank 15 is connected to the water tank 5 via a dosing pipe 12. The two ends of the liquid addition pipe 16 are respectively connected to the first dilution tank 14 and the second dilution tank 15. The liquid addition pump 17 is a quantitative pump installed on the liquid addition pipe 16. The liquid addition pump 17 and the water level switch 18 are both connected to the control device 7. Among them, the first dilution tank 14 is used to perform a first overall dilution of the sodium hypochlorite stock solution and obtain an intermediate dilution liquid. The second dilution tank 15 is used to perform a second quantitative dilution of the intermediate dilution liquid to obtain a measurable dilution liquid for detecting the residual chlorine concentration or a usable dilution liquid for addition to the water tank 5. The liquid inlet of the liquid adding pipe 16 in the first dilution tank 14 should be close to the bottom thereof, and the liquid adding pipe 16 enters the second dilution tank 15 from the upper part or the upper part of the side.

[0041] Furthermore, the dilution device 3 further includes a stirring device 19 disposed in the first dilution tank 14 and the second dilution tank 15 and connected to the control device 7. The stirring device 19 can promote mixing of the sodium hypochlorite stock solution and tap water therein.

[0042] Furthermore, the dilution device 3 also includes a water adding component, which is used to add dilution water taken from the water tank to the dilution tank, including a water adding main pipe 20, a water adding pump 21, a first water adding branch pipe 22, a second water adding branch pipe 23, a first water adding solenoid valve 24, and a second water adding solenoid valve 25; one end of the water adding main pipe 20 is connected to the water tank 5, and the other end of the water adding main pipe 20 is connected to the first dilution tank 14 and the second dilution tank 15 through the first water adding branch pipe 22 and the second water adding branch pipe 23 respectively; the water adding pump 21 is a quantitative pump, which is installed on the water adding main pipe 20. The first water-adding solenoid valve 24 and the second water-adding solenoid valve 25 are respectively installed on the first water-adding branch pipe 22 and the second water-adding branch pipe 23; the water-adding pump 21, the first water-adding solenoid valve 24 and the second water-adding solenoid valve 25 are all connected to the control device 7; the liquid inlet of the water-adding main pipe 20 in the water tank 5 should be close to its bottom, and the water-adding branch pipe enters it from the upper part or the upper part of the side of the corresponding dilution tank; through the cooperation of the water-adding pump 21, the first water-adding solenoid valve 24 and the second water-adding solenoid valve 25, water can be supplied to the first dilution tank 14 and the second dilution tank 15 respectively.

[0043] Furthermore, it also includes a drain pipe 41. An overflow pipe 42 is provided on the upper side of the first dilution tank 14 and the second dilution tank 15. One end of the overflow pipe 42 is connected to the corresponding dilution tank, and the other end is connected to the drain pipe 41. The liquid inlet of the overflow pipe 42 in the corresponding dilution tank is called an overflow port. In the first dilution tank 14, the overflow port of the overflow pipe 42 must be located lower than the water outlet positions of the sampling tube 10 and the first water-adding branch pipe 22; in the second dilution tank 15, the overflow port of the overflow pipe 42 must be located lower than the water outlet positions of the liquid-adding pipe 16 and the second water-adding branch pipe 23; when the water level of the solution in the first dilution tank 14 and the second dilution tank 15 is higher than the overflow port, the solution flows out from the overflow pipe, which helps to prevent the solution in the first dilution tank 14 and the second dilution tank 15 from flowing back.

[0044] Furthermore, the monitoring device 6 includes a water level meter 26 and a residual chlorine monitoring component. The water level meter 26 is installed in the water tank 5 and is used to monitor the water level of the tap water in the water tank 5 in real time. The residual chlorine monitoring component is used to monitor the residual chlorine concentration of the tap water in the water tank 5 and detect the residual chlorine concentration of the measurable dilution liquid diluted to a measurable concentration range. It includes a water diversion main pipe 27, a first water diversion branch pipe 28, a second water diversion branch pipe 29, a residual chlorine meter 30, a first water diversion solenoid valve 31 and a second water diversion solenoid valve 32. One end of the water diversion main pipe 27 is connected to the first water diversion branch pipe 28 and the second water diversion branch pipe 29 at the same time through a tee. The two water diversion branches 29 are connected, and the other end is connected to the drain pipe 41. The other end of the first water diversion branch 28 is directly connected to the lower part of the water tank 5, and the other end of the second water diversion branch 29 is directly connected to the lower part of the second dilution tank 15. The residual chlorine meter 30 selects a low-range online residual chlorine meter and is installed on the water diversion main pipe 27. The first water diversion solenoid valve 31 and the second water diversion solenoid valve 32 are respectively installed on the first water diversion branch 28 and the second water diversion branch 29; the water level meter 26, the residual chlorine meter 30, the first water diversion solenoid valve 31 and the second water diversion solenoid valve 32 are all connected to the control device 7.

[0045] The sampling tube 10, liquid addition tube 16, dosing tube 12, water diversion main pipe 27, first water diversion branch pipe 28, second water diversion branch pipe 29, overflow pipe 42, and drain pipe 41 mentioned above must all be made of corrosion-resistant materials, such as PE pipe, PP pipe, fluororubber pipe, stainless steel pipe, etc. The stock liquid storage tank 8 and dilution tank must also be made of corrosion-resistant materials. The water level detection switch 9, water level switch 18, water level gauge 26, and residual chlorine meter 30 are collectively referred to as special sensors. The agitator 19, sampling pump 11, liquid addition pump 17, water addition pump 21, dosing pump 13, first water addition solenoid valve 24, second water addition solenoid valve 25, first water diversion solenoid valve 31, and second water diversion solenoid valve 32 are collectively referred to as special equipment. The water level detection switch 9 and water level switch 18 in the special sensors, as well as the agitator 19, sampling pump 11, liquid addition pump 17, dosing pump 13, and second water diversion solenoid valve 25 in the special equipment, must also be corrosion-resistant.

[0046] Furthermore, the control device 7 includes an intelligent controller 33 and a remote controller 34. The intelligent controller 33 includes a data acquisition module 35, a data storage module 36, a data processing module 37, a control module 38 and a communication module 39. The data acquisition module 35 is connected to the dedicated sensor and the data storage module 36 respectively. The data storage module 36 is connected to the data acquisition module 35, the data processing module 37 and the communication module 39 respectively. The data processing module 37 is connected to the data storage module 36, the control module 38 and the communication module 39 respectively. The control module 38 is connected to the data processing module 37 and the dedicated device respectively. The communication module 39 is connected to the remote controller 34, the data processing module 37 and the data storage module 36 respectively. 35 can collect data from special sensors in real time; the data storage module 36 can store various data collected by the data acquisition module 35 in real time, can store the later calculation results of the data processing module 37, and can store the data and signals received or sent by the communication module 39; the data processing module 37 is a single-chip microcomputer, which can perform various calculations and send control signals according to pre-written software; the control module 38 uses a relay, which can realize the opening and closing of the special equipment according to the control signal sent by the data processing module 37; the communication module 39 can communicate with the remote controller 34 in both directions, and can not only receive data and control signals sent by the remote controller 34, but also send data and alarm signals to the remote controller 34.

[0047] The remote controller 34 is located in the secondary water supply management center and is used to send software upgrade version data to the intelligent controller 33, send various parameter data that need to be manually set to the intelligent controller 33, send control signals to the intelligent controller 33 to turn on or off special equipment, and can receive data and alarm signals sent by the intelligent controller 33.

[0048] The stock solution storage device 1, sampling assembly 2, dilution device 3, dosing assembly 4, residual chlorine detection assembly, and intelligent controller 33 are all housed within a housing. The housing is constructed of cold-rolled steel and measures 0.8m x 0.55m x 1.15m. It is divided into two levels: the upper level houses the intelligent controller 33, while the lower level houses the stock solution storage device 1, sampling assembly 2, dilution device 3, dosing assembly 4, and residual chlorine detection assembly.

[0049] Example 2

[0050] A method for adding chlorine to a secondary water supply intelligent chlorine addition device based on the shared low-range residual chlorine meter comprises the following steps:

[0051] S1, using a low-range online residual chlorine meter 30 to monitor the residual chlorine concentration of tap water in the water tank 5 in real time, while the intelligent controller 33 collects the residual chlorine concentration data monitored by the residual chlorine meter in real time. When the residual chlorine concentration is equal to or lower than the set residual chlorine safety value, the chlorine addition operation is started;

[0052] In step S1, the residual chlorine safety value is a manually set residual chlorine concentration value, which means that when the residual chlorine concentration of the tap water in the water tank 5 drops to this value, it is necessary to start adding chlorine to the tap water in the water tank 5. It is represented by C0 and its value range is 0.05-0.3 mg / L, preferably 0.15 mg / L;

[0053] S2, the intelligent controller 33 performs the first sampling of the sodium hypochlorite stock solution through the sampling component 2, adds a fixed amount of the sodium hypochlorite stock solution into the first dilution tank 14, and determines the estimated value of the available chlorine content;

[0054] The volume of the first sampling of sodium hypochlorite stock solution is manually set, and the intelligent controller 33 starts the sampling pump 11 to add the sodium hypochlorite stock solution from the stock solution storage tank 8 to the first dilution tank 14;

[0055] In step S2, the method for determining the estimated value of the available chlorine content of the sodium hypochlorite stock solution is as follows: let the estimated value of the available chlorine content of the sodium hypochlorite stock solution be C1, take the available chlorine content of the sodium hypochlorite stock solution calculated last time as the value of C1, and if the chlorine addition equipment is started for the first time after adding the sodium hypochlorite stock solution, take the available chlorine content indicated on the sodium hypochlorite stock solution as C1;

[0056] S3, the intelligent controller 33 dilutes the sodium hypochlorite stock solution in the first dilution tank 14 through the dilution device 3 to obtain an intermediate dilution solution, and calculates the volume of the intermediate dilution solution to be added from the first dilution tank 14 to the second dilution tank 15 based on the target residual chlorine concentration to be diluted. The added intermediate dilution solution is further diluted in the second dilution tank 15 to form a measurable dilution solution;

[0057] In step S3, the dilution work of the sodium hypochlorite stock solution after the first sampling is implemented by the dilution device 3. The dilution device 3 uses the first dilution tank 14 and the second dilution tank 15 to dilute the sodium hypochlorite stock solution into a range that can be accurately detected by the low-range online residual chlorine instrument. The specific method of the first round of dilution is as follows: after the quantitative sodium hypochlorite stock solution is added to the first dilution tank 14, the intelligent controller 33 starts the water pump 21 and the corresponding first water-adding solenoid valve 24 to add water to the first dilution tank 14. When the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water pump 21 and the first water-adding solenoid valve 24, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the first round of dilution ends, and the residual chlorine in the first round of dilution is obtained. The solution obtained is called the intermediate dilution liquid; the specific method of the second round of dilution is as follows: the intelligent controller 33 first calculates the volume of the intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 according to the following calculation method, then starts the liquid adding pump 17 to add this volume of the intermediate dilution liquid to the second dilution tank 15, and then starts the water adding pump 21 and the corresponding second water adding solenoid valve 25 to add water to the second dilution tank 15. When the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water adding pump 21 and the second water adding solenoid valve 25, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the second round of dilution is ended. The solution obtained after the second round of dilution is called the measurable dilution liquid; the dilution water used in the two rounds of dilution is taken from the water tank 5;

[0058] Assuming that the volume of the intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 during the dilution process after the first sampling is V2, the calculation formula for V2 is:

[0059]

[0060] Among them, V a is the effective volume of the first dilution tank 14, V b is the effective volume of the second dilution tank 15; V1 is the volume of the first sample of sodium hypochlorite stock solution, and when setting V1, it must meet 0.001V a ≤V1≤0.004V a The purpose of setting this condition is to ensure that the dilution multiple of the first round of dilution reaches 250 to 1000 times; C m The target residual chlorine concentration of the measurable dilution solution obtained by further diluting the intermediate dilution solution is in the range of 0.1 to 1.0 mg / L, preferably 0.6 mg / L;

[0061] S4. Use the same chlorine residual meter that detects the chlorine residual concentration of the tap water in the water tank 5 to detect the chlorine residual concentration of the measurable diluent. The control device determines whether it is necessary to perform the work of adding the quantitative intermediate diluent from the first dilution tank to the second dilution tank for re-dilution in step S3 again according to the detection result. If the detection result is greater than or equal to the chlorine residual comparison value, directly proceed to step S5. If the detection result is less than the chlorine residual comparison value, after completing the work of adding the quantitative intermediate diluent from the first dilution tank to the second dilution tank for re-dilution again and the re-concentration detection, proceed to step S5.

[0062] In this step, before detecting the chlorine residual concentration of the measurable diluent, the intelligent controller 33 first closes the first water inlet solenoid valve 31 to close the water inlet from the water tank 5 in the water inlet of the chlorine residual meter 30, and then opens the second water inlet solenoid valve 32 to open the water inlet from the second dilution tank 15 in the water inlet of the chlorine residual meter 30. After the detection of the chlorine residual concentration of the measurable diluent is completed, the intelligent controller 33 first closes the second water inlet solenoid valve 32 to close the water inlet from the second dilution tank 15 in the water inlet of the chlorine residual meter 30, and then opens the first water inlet solenoid valve 31 to open the water inlet from the water tank 5 in the water inlet of the chlorine residual meter 30, so that the chlorine residual meter 30 continues to monitor the chlorine residual concentration of the tap water in the water tank 2 in real time.

[0063] In step S4, the chlorine residual comparison value is a chlorine residual concentration value set artificially, used to judge whether it is necessary to perform the work of adding the quantitative intermediate diluent from the first dilution tank 14 to the second dilution tank 15 for re-dilution again, represented by C2, and its value range is 0.15 - 0.4 mg / L, preferably 0.25 mg / L. Let the detected chlorine residual concentration of the measurable diluent be C j , the intelligent controller 1 compares C j and C2. When C j ≥ C2, proceed to step S5. When C j < C2, then after adding all the remaining measurable diluent in the second dilution tank 15 in step S3 to the water tank 5, add the quantitative intermediate diluent from the first dilution tank 14 to the second dilution tank 15 for re-dilution again. The reason for setting this step is that if C j is too close to C0, there will be relatively large measurement errors and calculation errors.

[0064] Let the volume of the intermediate diluent added from the first dilution tank 14 to the second dilution tank 15 again be V 2 / c , let the target value of the chlorine residual concentration of the measurable diluent obtained after adding the intermediate diluent from the first dilution tank 1 to the second dilution tank 15 for re-dilution again be C m / c , and its value range is 0.1 - 1.0 mg / L, preferably 0.5 mg / L. Then:

[0065]

[0066] The intelligent controller 33 starts the liquid adding pump 17 to add the liquid with a volume of V 2 / c The intermediate dilution liquid is added to the second dilution tank 15 and diluted again. After the dilution is completed, the residual chlorine concentration of the measurable dilution liquid is detected again and recorded as C j / c ;

[0067] S5, the intelligent controller 33 calculates the available chlorine content of the sodium hypochlorite stock solution and the volume of the second sample of the sodium hypochlorite stock solution, first adds the remaining measurable dilution liquid in the second dilution tank 15 into the water tank 5 through the dosing component 4, and then, based on the calculated result, the dilution component performs a second sample of the sodium hypochlorite stock solution and adds it to the first dilution tank 14, where it is mixed with the remaining intermediate dilution liquid to form a mixed solution;

[0068] In step S5, the method for calculating the effective chlorine content of the sodium hypochlorite stock solution is: assuming that the effective chlorine content of the sodium hypochlorite stock solution is C, then:

[0069]

[0070] In step S5, the method for calculating the volume of the second sample of sodium hypochlorite stock solution is: assuming that the volume of the second sample of sodium hypochlorite stock solution is V′1, then:

[0071]

[0072] Wherein, H is the water level height of the water tank 5 detected by the water level gauge 26 when the residual chlorine concentration of the tap water in the water tank 5 is equal to or lower than the residual chlorine safety value; S is the horizontal longitudinal cross-sectional area of ​​the water tank 5. The horizontal longitudinal cross-sectional area of ​​the water tank 5 refers to the cross-sectional area obtained by cutting the water tank 5 with a plane parallel to the length and width of the water tank 5; C t The residual chlorine increase value is an artificially set residual chlorine concentration value, which refers to the value of the increase in the residual chlorine concentration of the tap water in the water tank 5 after one chlorine addition. Its value range is 0.1~0.4mg / L, preferably 0.2mg / L.

[0073] The intelligent controller 33 first starts the dosing pump 13 to add the remaining measurable dilution liquid in the second dilution tank 15 into the water tank 5, and then starts the sampling pump 11 to add the sodium hypochlorite stock solution with a volume of V'1 into the first dilution tank 14, and mixes it with the remaining intermediate dilution liquid to form a mixed solution;

[0074] S6, the intelligent controller 33 implements the dilution and dosing of the sodium hypochlorite stock solution after the second sampling through the dosing component. The sodium hypochlorite stock solution is diluted to a usable concentration range through two rounds of dilution in the two dilution tanks. After each dilution work in the second dilution tank 15 is completed, the usable dilution liquid in the second dilution tank 15 is added to the water tank. The three actions of adding liquid, diluting in the second dilution tank, and dosing are repeated until the chlorine replenishment work of the tap water in the water tank is completed.

[0075] In step S6, the dilution work after the second sampling of the sodium hypochlorite stock solution is implemented by the dilution device, and the dilution device uses the first dilution tank 14 and the second dilution tank 15 to dilute the sodium hypochlorite stock solution into a usable range in two rounds of dilution; after the second sampling of the sodium hypochlorite stock solution is added to the first dilution tank 14, the intelligent controller 33 starts the water pump 21 and the first water adding solenoid valve 24 to add water to the first dilution tank 14. When the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water pump 21 and the first water adding solenoid valve 24, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the first round of dilution ends. The solution obtained after the first round of dilution is called the new intermediate dilution solution; the second round of dilution is divided into multiple times The specific method for each dilution is as follows: the intelligent controller 33 first calculates the volume of the new intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 according to the following calculation method, then starts the liquid adding pump 15 to add this volume of the new intermediate dilution liquid to the second dilution tank 15, and then starts the water adding pump 21 and the second water adding solenoid valve 25 to add water to the second dilution tank 15. When the water level in the second dilution tank 15 reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water adding pump 21 and the second water adding solenoid valve 25, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the second round of dilution ends. The solution obtained after the second round of dilution is called the usable dilution liquid; the dilution water used in the two dilution processes is taken from the water tank 5;

[0076] During the dilution process, it is necessary to calculate the volume of the new intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15. Let this volume be V′2. The calculation formula is as follows:

[0077]

[0078] Among them, C is the set target residual chlorine concentration of the available dilution liquid, and its value range is 2-4 mg / L, preferably 3 mg / L; after each dilution work of the second dilution tank is completed, the intelligent controller 33 starts the dosing pump 13 to add the available dilution liquid in the second dilution tank 15 to the water tank 5; adding liquid refers to quantitatively adding the new intermediate dilution liquid in the first dilution tank 14 to the second dilution tank 15, and dosing refers to adding the available dilution liquid in the second dilution tank 15 to the water tank; when the new intermediate dilution liquid in the first dilution tank 14 is used up and the available dilution liquid in the second dilution tank 15 is all added to the water tank 5, the chlorine replenishment work of the tap water in the water tank 5 is completed.

[0079] Example 3

[0080] Based on Example 2, this example is further described in combination with specific data. Assume that the volume of the managed water tank 5 is 5.5×3×2=33m 3 , the horizontal longitudinal section area is 5.5×3=16.5m 2 .

[0081] Specifically, in step S1, a low-range online residual chlorine meter is used to monitor the residual chlorine concentration of the tap water in the water tank 5 in real time. The residual chlorine safety value is set to 0.15 mg / L. At a certain moment, the residual chlorine meter 30 detects that the residual chlorine concentration of the tap water in the water tank 5 drops to 0.15 mg / L, so the intelligent controller 33 starts the chlorine addition work.

[0082] In step S2, the volume of the first sampled sodium hypochlorite solution is set to 20 ml. After the chlorine addition operation is started, the intelligent controller 1 starts the sampling pump 11 to add 20 ml of the sodium hypochlorite solution into the first dilution tank 14. Since the chlorine addition started this time is the first time after the sodium hypochlorite solution is added, the indicated value of the available chlorine content of the sodium hypochlorite solution, 100 g / L, is taken as the estimated value of the available chlorine content of the sodium hypochlorite solution, that is, C1 = 100 g / L.

[0083] In step S3, the dilution work of the sodium hypochlorite stock solution after the first sampling is implemented by the dilution device, and the dilution device adopts the first dilution tank 14 and the second dilution tank 15 to dilute the sodium hypochlorite stock solution into the range that can be accurately detected by the low-range online residual chlorine instrument by two rounds of dilution. The specific method of the first round of dilution is as follows: after 20ml of sodium hypochlorite stock solution is added to the first dilution tank 14, the intelligent controller 33 starts the water pump 21 and the first water-adding solenoid valve 24 to add water to the first dilution tank 14. When the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water pump 21 and the first water-adding solenoid valve 24, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the first round of dilution ends. The solution obtained after the first round of dilution is completed. The liquid is called the intermediate dilution liquid; the specific method of the second round of dilution is as follows: the intelligent controller 33 first calculates the volume of the intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 according to the following calculation method, then starts the liquid adding pump 17 to add 77 ml of the intermediate dilution liquid to the second dilution tank 15, then starts the water adding pump 21 and the second water adding solenoid valve 25 to add water to the second dilution tank 15. When the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water adding pump 18 and the second water adding solenoid valve 25, and simultaneously starts the corresponding agitator 19. After the stirring is completed, the second round of dilution ends. The solution obtained after the second round of dilution is called the measurable dilution liquid; the dilution water used in the two rounds of dilution is taken from the water tank 5;

[0084] Assuming that the volume of the intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 during the dilution process after the first sampling is V2, the method for calculating V2 is as follows: In this embodiment, the residual chlorine safety value C0 is set to 0.15 mg / L, and the effective volume V of the first dilution tank 14 is a and the effective volume V of the second dilution tank 15 b The volume of the first sample of sodium hypochlorite stock solution is 18.5L. The volume V1 of the first sample of sodium hypochlorite stock solution is 20ml, i.e. 0.02L. The estimated value C1 of the effective chlorine content of the sodium hypochlorite stock solution is 100g / L, i.e. 100000mg / L. The target value C of the residual chlorine concentration of the dilution solution that can be measured after the second round of dilution is set. m is 0.6 mg / L, then:

[0085]

[0086] In step S4, after the second round of dilution is completed, the same residual chlorine meter 30 used to detect the residual chlorine concentration of the tap water in the water tank 5 is used to detect the residual chlorine concentration of the measurable dilution liquid; before detecting the residual chlorine concentration of the measurable dilution liquid, the intelligent controller 1 first closes the first water diversion solenoid valve 31 to close the water inlet from the water tank 5 to the residual chlorine meter 30, and then opens the second water diversion solenoid valve 32 to open the water inlet from the second dilution tank 15 to the residual chlorine meter 30; after the detection of the residual chlorine concentration of the measurable dilution liquid is completed, the intelligent controller 33 first closes the second water diversion solenoid valve 32 to close the water inlet from the second dilution tank 15 to the residual chlorine meter 30, and then opens the first water diversion solenoid valve 31 to open the water inlet from the water tank 5 to the residual chlorine meter 30, allowing the residual chlorine meter 30 to continue to monitor the residual chlorine concentration of the tap water in the water tank 5 in real time;

[0087] This embodiment can detect the residual chlorine concentration C of the dilution solution. j The result is 0.49mg / L, and the residual chlorine comparison value C2 is set to 0.25mg / L. j >C2, so go directly to step S5.

[0088] In step S5, the available chlorine content of the sodium hypochlorite stock solution is set to C. j ≥C2, therefore:

[0089]

[0090] Assume that the volume of the second sample of sodium hypochlorite stock solution is V'1. When the residual chlorine concentration of the tap water in the water tank 5 drops to the residual chlorine safety value of 0.15 mg / L, the water level gauge 26 detects that the water level height H of the water tank 5 is 1.053 m, and the horizontal longitudinal cross-sectional area S of the water tank 5 is 16.5 m 2 , residual chlorine increase value C t If it is set to 0.2 mg / L, then:

[0091]

[0092] The intelligent controller 33 first starts the dosing pump 13 to add the remaining measurable dilution liquid in the second dilution tank 15 into the water tank 5, and then starts the sampling pump 11 to add 26 ml of sodium hypochlorite stock solution into the first dilution tank 14, and mixes it with the remaining intermediate dilution liquid therein to form a mixed solution.

[0093] In step S6, the dilution work after the second sampling of the sodium hypochlorite stock solution is implemented by the dilution device, and the dilution device uses the first dilution tank 14 and the second dilution tank 15 to dilute the sodium hypochlorite stock solution into a usable range in two rounds of dilution; the specific method of the first round of dilution is: after the second sampling of the sodium hypochlorite stock solution is added to the first dilution tank 14, the intelligent controller 33 starts the water pump 21 and the first water adding solenoid valve 24 to add water to the first dilution tank 14, and when the water level therein reaches the set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water pump 21 and the first water adding solenoid valve 24, and starts the corresponding agitator 19 at the same time. After the stirring is completed, the first round of dilution ends, and the solution obtained after the first round of dilution is called the new intermediate dilution solution; the second round of dilution is divided into: This is repeated multiple times, and the specific method for each time is as follows: the intelligent controller 33 first calculates the volume of the new intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 as 281 ml according to the following calculation method, then starts the liquid adding pump 17 to add 281 ml of the new intermediate dilution liquid to the second dilution tank 15, and then starts the water adding pump 21 and the second water adding solenoid valve 25 to add water to the second dilution tank 15. When the water level therein reaches a set position, the dilution tank water level switch 18 sends a signal to the intelligent controller 33 to stop adding water. After receiving the signal, the intelligent controller 33 turns off the water adding pump 21 and the second water adding solenoid valve 25, and simultaneously starts the corresponding agitator 19. After the stirring is completed, the second round of dilution ends. The solution obtained after the second round of dilution is called the usable dilution liquid; the dilution water used in the two rounds of dilution is taken from the water tank 5;

[0094] During the dilution process, the volume V′2 of the new intermediate dilution liquid added from the first dilution tank 14 to the second dilution tank 15 needs to be calculated. The target residual chlorine concentration C of the dilution liquid can be used. k If it is set to 3 mg / L, then:

[0095]

[0096] After each second round of dilution is completed, the intelligent controller 33 starts the dosing pump 13 to add the available diluent in the second dilution tank 15 to the water tank 5;

[0097] Repeat the three steps of adding liquid, diluting in the second dilution tank, and dosing until the chlorination of the tap water in the water tank is complete. Adding liquid refers to adding a certain amount of the new intermediate dilution liquid from the first dilution tank 14 to the second dilution tank 15, and dosing refers to adding the available dilution liquid from the second dilution tank 15 to the water tank 5. When the new intermediate dilution liquid in the first dilution tank 14 is used up and the available dilution liquid in the second dilution tank 15 is completely dosed into the water tank 5, the chlorination of the tap water in the water tank 5 is completed.

[0098] In summary, the present invention can, when the residual chlorine concentration is lower than a set value, first dilute the high-concentration sodium hypochlorite stock solution to a range that can be accurately detected by a low-range online residual chlorine meter to detect the residual chlorine concentration, then calculate the accurate available chlorine content of the sodium hypochlorite stock solution based on the residual chlorine concentration, and then dilute the quantitative high-concentration sodium hypochlorite stock solution to a concentration range permitted by regulations for use according to actual needs. The entire monitoring, sampling, dilution, liquid addition, and dosing process of the present invention are all performed automatically, and maintenance is simple and convenient, with a very high degree of intelligence.

Claims

1. A secondary water supply intelligent chlorine addition device based on a shared low-range residual chlorine meter, comprising a raw liquid storage device (1), a sampling component (2), a dilution device (3), a dosing component (4), a monitoring device (6) and a control device (7); the raw liquid storage device (1) is connected to the dilution device (3) via the sampling component (2), the dilution device (3) is connected to the water tank (5) via the dosing component (4), the monitoring device (6) is installed on the water tank (5) and connected to the dilution device (3), and the control device (7) is connected to the raw liquid storage device (1), the sampling component (2), the dilution device (3), the dosing component (4) and the monitoring device (6), wherein: When the residual chlorine concentration of the tap water in the water tank (5) is lower than the set value, the control device (7) first dilutes the fixed amount of sodium hypochlorite stock solution to within the detectable range of the monitoring device (6), calculates the accurate effective chlorine content of the sodium hypochlorite stock solution based on the detection result, and then controls the sampling component (2) to add the fixed amount of sodium hypochlorite stock solution to the dilution device (3), dilutes it into a sodium hypochlorite solution of the set concentration through the dilution device (3), and adds it to the water tank (5) through the dosing component (4); The dilution device (3) includes a first dilution tank (14), a second dilution tank (15), a liquid adding pipe (16) and a liquid adding pump (17). A water level switch (18) and an agitator (19) are provided in the first dilution tank (14) and the second dilution tank (15). The first dilution tank (14) is connected to the stock liquid storage tank (8) through a sampling pipe (10). The second dilution tank (15) is connected to the water tank (5) through a dosing pipe (12). Both ends of the liquid adding pipe (16) are connected to the first dilution tank (14) and the second dilution tank (15). The liquid adding pump (17) is installed on the liquid adding pipe (16). The liquid adding pump (17), the water level switch (18) and the agitator (19) are all connected to the control device (7). The volume of the intermediate dilution liquid added from the first dilution tank (14) to the second dilution tank (15) during the dilution process after the first sampling is ,but The calculation formula is: in, is the effective volume of the first dilution tank (14), The effective volume of the second dilution tank (15); is the volume of the sodium hypochlorite stock solution sampled for the first time, satisfy ; The target value of residual chlorine concentration of the measurable dilution liquid obtained by diluting the intermediate dilution liquid again is within the range of 0.1 1.0mg / L.

2. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 1, characterized in that: The raw liquid storage device (1) comprises a raw liquid storage tank (8) and a water level detection switch (9). The water level detection switch (9) is installed in the raw liquid storage tank (8) and connected to the control device (7).

3. A secondary water supply intelligent chlorine supplement device based on a shared low-range residual chlorine meter according to claim 1 or 2, characterized in that: The sampling assembly (2) comprises a sampling tube (10) and a sampling pump (11) arranged on the sampling tube (10); one end of the sampling tube (10) is connected to the raw liquid storage tank (8), and the other end is connected to the dilution device (3); the sampling pump (11) is installed on the sampling tube (10) and connected to the control device (7); the liquid inlet of the sampling tube (10) in the raw liquid storage tank (8) is close to the bottom thereof, and the sampling tube (10) enters the dilution device (3) from the upper part or the upper side thereof.

4. A secondary water supply intelligent chlorine supplement device based on a shared low-range residual chlorine meter according to claim 1 or 2, characterized in that: The dosing assembly (4) includes a dosing pipe (12) and a dosing pump (13) arranged on the dosing pipe (12). One end of the dosing pipe (12) is connected to the dilution device (3), and the other end is connected to the water tank (5). The dosing pump (13) is installed on the dosing pipe (12) and connected to the control device (7).

5. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 3, characterized in that: The dosing assembly (4) includes a dosing pipe (12) and a dosing pump (13) arranged on the dosing pipe (12). One end of the dosing pipe (12) is connected to the dilution device (3), and the other end is connected to the water tank (5). The dosing pump (13) is installed on the dosing pipe (12) and connected to the control device (7).

6. A secondary water supply intelligent chlorine supplementation device based on a shared low-range residual chlorine meter according to claim 1, 2 or 5, characterized in that: The first dilution tank (14) and the second dilution tank (15) are both provided with an overflow pipe (42) on the upper side thereof. One end of the overflow pipe (42) is connected to the corresponding dilution tank, and the other end is connected to the drain pipe (41). The liquid inlet of the overflow pipe (42) in the corresponding dilution tank is called an overflow port. In the first dilution tank (14), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the sampling tube (10) and the first water supply branch (22); in the second dilution tank (15), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the liquid supply tube (16) and the second water supply branch (23).

7. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 3, characterized in that: The first dilution tank (14) and the second dilution tank (15) are both provided with an overflow pipe (42) on the upper side thereof. One end of the overflow pipe (42) is connected to the corresponding dilution tank, and the other end is connected to the drain pipe (41). The liquid inlet of the overflow pipe (42) in the corresponding dilution tank is called an overflow port. In the first dilution tank (14), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the sampling tube (10) and the first water supply branch (22); in the second dilution tank (15), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the liquid supply tube (16) and the second water supply branch (23).

8. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 4, characterized in that: The first dilution tank (14) and the second dilution tank (15) are both provided with an overflow pipe (42) on the upper side thereof. One end of the overflow pipe (42) is connected to the corresponding dilution tank, and the other end is connected to the drain pipe (41). The liquid inlet of the overflow pipe (42) in the corresponding dilution tank is called an overflow port. In the first dilution tank (14), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the sampling tube (10) and the first water supply branch (22); in the second dilution tank (15), the overflow port of the overflow pipe (42) must be located lower than the water outlet of the liquid supply tube (16) and the second water supply branch (23).

9. A secondary water supply intelligent chlorine addition device based on a shared low-range residual chlorine meter according to claim 1, 2, 5, 7 or 8, characterized in that: The monitoring device (6) includes a water level meter (26) and a residual chlorine monitoring assembly. The water level meter (26) is installed in the water tank (5); the residual chlorine monitoring assembly includes a water diversion main pipe (27), a first water diversion branch pipe (28), a second water diversion branch pipe (29), a residual chlorine meter (30), a first water diversion solenoid valve (31) and a second water diversion solenoid valve (32); one end of the first water diversion branch pipe (28) and the second water diversion branch pipe (29) are both connected to the water diversion main pipe (27), and the first water diversion branch pipe (28) is connected to the water diversion main pipe (27). The other end is connected to the water tank (5), the other end of the second water diversion branch pipe (29) is connected to the second dilution tank (15), the residual chlorine meter (30) is installed on the water diversion main pipe (27), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are installed on the first water diversion branch pipe (28) and the second water diversion branch pipe (29), respectively, and the water level meter (26), the residual chlorine meter (30), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are all connected to the control device (7).

10. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 3, characterized in that: The monitoring device (6) includes a water level meter (26) and a residual chlorine monitoring assembly. The water level meter (26) is installed in the water tank (5); the residual chlorine monitoring assembly includes a water diversion main pipe (27), a first water diversion branch pipe (28), a second water diversion branch pipe (29), a residual chlorine meter (30), a first water diversion solenoid valve (31) and a second water diversion solenoid valve (32); one end of the first water diversion branch pipe (28) and the second water diversion branch pipe (29) are both connected to the water diversion main pipe (27), and the first water diversion branch pipe (28) is connected to the water diversion main pipe (27). The other end is connected to the water tank (5), the other end of the second water diversion branch pipe (29) is connected to the second dilution tank (15), the residual chlorine meter (30) is installed on the water diversion main pipe (27), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are installed on the first water diversion branch pipe (28) and the second water diversion branch pipe (29), respectively, and the water level meter (26), the residual chlorine meter (30), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are all connected to the control device (7).

11. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 3, characterized in that: The monitoring device (6) includes a water level meter (26) and a residual chlorine monitoring assembly. The water level meter (26) is installed in the water tank (5); the residual chlorine monitoring assembly includes a water diversion main pipe (27), a first water diversion branch pipe (28), a second water diversion branch pipe (29), a residual chlorine meter (30), a first water diversion solenoid valve (31) and a second water diversion solenoid valve (32); one end of the first water diversion branch pipe (28) and the second water diversion branch pipe (29) are both connected to the water diversion main pipe (27), and the first water diversion branch pipe (28) is connected to the water diversion main pipe (27). The other end is connected to the water tank (5), the other end of the second water diversion branch pipe (29) is connected to the second dilution tank (15), the residual chlorine meter (30) is installed on the water diversion main pipe (27), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are installed on the first water diversion branch pipe (28) and the second water diversion branch pipe (29), respectively, and the water level meter (26), the residual chlorine meter (30), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32) are all connected to the control device (7).

12. The intelligent chlorine supplement device for secondary water supply based on a shared low-range residual chlorine meter according to claim 9, characterized in that: The control device (7) includes an intelligent controller (33) and a remote controller (34). The intelligent controller (33) includes a data acquisition module (35), a data storage module (36), a data processing module (37), a control module (38) and a communication module (39). The data acquisition module (35) is connected to the water level detection switch (9), the water level switch (18), the water level meter (26), the residual chlorine meter (30) and the data storage module (36). The data storage module (36) is also connected to the data acquisition module (35), the data storage module (36) and the data processing module (37). The processing module (37) is connected to the communication module (39), the data processing module (37) is also connected to the control module (38) and the communication module (39), the control module (38) is also connected to the agitator (19), the sampling pump (11), the liquid adding pump (17), the water adding pump (21), the dosing pump (13), the first water adding solenoid valve (24), the second water adding solenoid valve (25), the first water diversion solenoid valve (31) and the second water diversion solenoid valve (32), and the communication module (39) is also connected to the remote controller (34).

Images