Online preparation and dilution of sodium hypochlorite and a method of using the same

Abstract

The online preparation and online dilution combined dosing system of sodium hypochlorite comprises a sodium hypochlorite generator and a dosing lifting pump, at least two transfer tanks are connected in parallel through pipelines between the liquid outlet pipe of the sodium hypochlorite generator and the liquid inlet of the dosing lifting pump, at least one of the transfer tanks is a dual-purpose tank, valves are arranged on the liquid inlet pipe and the liquid outlet pipe of the dual-purpose tank, the dual-purpose tank is communicated with the liquid outlet of the commodity sodium hypochlorite lifting pump and the liquid inlet of the online proportional dilution device through pipelines with valves, the liquid inlet of the online proportional dilution device is also communicated with a soft water inlet pipe, the liquid outlet of the online proportional dilution device is communicated with the liquid outlet pipe of the sodium hypochlorite generator through a pipeline with a valve, and the use method of the system is also disclosed. The system integrates the preparation, dilution and dosing processes of sodium hypochlorite together, improves the efficiency and safety, reduces the equipment cost and floor area, and avoids the deterioration and waste of high-concentration commodity sodium hypochlorite due to inconvenience.

Description

Technical Field

[0001] This invention relates to the field of sodium hypochlorite preparation technology, and particularly to an online preparation and online dilution and addition system for sodium hypochlorite, and its usage method. Background Technology

[0002] In the water treatment industry, sodium hypochlorite is a commonly used disinfectant, and it is mainly obtained in two ways: purchasing high-concentration commercial sodium hypochlorite and preparing it online using a sodium hypochlorite generator.

[0003] High-concentration commercial sodium hypochlorite can be purchased in batches according to usage, flexibly responding to changes in demand. It also requires no additional equipment investment and can be used immediately upon purchase, offering high convenience. However, sodium hypochlorite is volatile, which can lead to waste, and its transportation and storage costs are relatively high.

[0004] Sodium hypochlorite generators produce raw materials (such as table salt) online that have a long shelf life and stable supply, resulting in low operating costs over long-term use. This also reduces the transportation and storage of chemicals, lowering environmental risks. However, the purchase and installation costs of the generators are high, and their maximum output is limited, potentially failing to meet demand during periods of water quality fluctuation or sudden increases in usage.

[0005] Many water treatment projects simultaneously configure both high-concentration commercial sodium hypochlorite and sodium hypochlorite generators. However, the effective chlorine concentration of commercial sodium hypochlorite is typically 10%, while the effective chlorine concentration of sodium hypochlorite produced online by a sodium hypochlorite generator is typically 1%, resulting in a tenfold difference in the flow rates of the corresponding booster pumps. Therefore, the storage tanks and booster pumps for the two systems need to be configured independently, leading to an increase in the number of devices and a larger footprint.

[0006] According to GB50013-2018 "Outdoor Water Supply Design Standard", the storage period for high-concentration commercial sodium hypochlorite should not exceed 7 days; otherwise, it will be wasted due to volatilization and deterioration. Furthermore, continuous use of large quantities of commercial sodium hypochlorite may lead to long-term shutdown of the generator, reducing equipment utilization and increasing production and maintenance costs.

[0007] Therefore, in view of the shortcomings of the existing technology, it is necessary to design an online preparation and online dilution and fusion dosing system and usage method for sodium hypochlorite to solve the above problems.

[0008] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solution of the present invention and for the convenience of those skilled in the art to understand it. It should not be assumed that the above content is known to those skilled in the art simply because it has been described in the background of the present invention. Summary of the Invention

[0009] To overcome the shortcomings of the prior art, the present invention aims to disclose an online preparation and online dilution fusion dosing system and its usage method for sodium hypochlorite, which solves the problems of large number of devices, large area occupation, and high maintenance costs when two sodium hypochlorite supply systems, namely high-concentration commercial sodium hypochlorite and online preparation using a sodium hypochlorite generator, are used simultaneously.

[0010] This invention discloses an online preparation and online dilution fusion dosing system for sodium hypochlorite, including a sodium hypochlorite generator and a dosing booster pump. The sodium hypochlorite generator is used to prepare standard concentration sodium hypochlorite on site; the dosing booster pump is used to transport sodium hypochlorite to the dosing point.

[0011] At least two intermediate storage tanks are connected in parallel via pipelines between the outlet pipe of the sodium hypochlorite generator and the inlet of the dosing booster pump. At least one of these intermediate storage tanks is a dual-purpose tank, equipped with valves on both its inlet and outlet pipes. The dual-purpose tank is connected to the outlet of the commercial sodium hypochlorite booster pump via a valved pipe, allowing it to switch between storing self-made standard concentration sodium hypochlorite and purchased high-concentration commercial sodium hypochlorite as needed. The dual-purpose tank is also connected to the inlet of an online proportional dilution device via a valved pipe. The inlet of the online proportional dilution device is also connected to a soft water inlet pipe, which supplies soft water to the online proportional dilution device. The outlet of the online proportional dilution device is connected to the outlet pipe of the sodium hypochlorite generator via a valved pipe, allowing the high-concentration sodium hypochlorite solution to be diluted to the required concentration using the online proportional dilution device.

[0012] Preferred technical solution: The online proportional dilution device includes a pipeline mixer. The outlet of the pipeline mixer is connected to the outlet pipe of the sodium hypochlorite generator through a pipeline with a valve. The inlet of the pipeline mixer is connected to a dual-purpose storage tank and a soft water inlet pipe through pipelines respectively. A first flow regulating valve, a first electric valve, and a first flow meter are installed on the pipeline between the soft water inlet pipe and the pipeline mixer. A dilution booster pump, a second flow regulating valve, and a second flow meter are installed on the pipeline between the dual-purpose storage tank and the pipeline mixer. Through the cooperation of the electric valve, the flow regulating valve, and the flow meter, high-concentration sodium hypochlorite can be automatically diluted and added proportionally.

[0013] Preferred technical solution: Valves are provided at both the inlet and outlet of the dosing booster pump to facilitate control of the dosing system.

[0014] Preferred technical solution: A third flow meter is installed on the pipeline between the commercial sodium hypochlorite booster pump and the dual-purpose storage tank to control the storage volume of high-concentration commercial sodium hypochlorite.

[0015] Preferred technical solution: The number of dual-purpose storage tanks is two or more, which can store high-concentration commercial sodium hypochlorite in batches.

[0016] This invention also discloses a method for using an online sodium hypochlorite preparation and online dilution and fusion dosing system, including two modes: online preparation of sodium hypochlorite and dilution and fusion of commercial sodium hypochlorite. The specific steps are as follows: Online sodium hypochlorite preparation mode: Adjust the valves in the system to ensure that at least one of the intermediate storage tanks between the sodium hypochlorite generator and the dosing booster pump remains connected. Start the sodium hypochlorite generator to continuously produce standard concentration sodium hypochlorite and deliver it to the connected intermediate storage tank. The dosing booster pump extracts the standard concentration sodium hypochlorite from the intermediate storage tank to the dosing location for use.

[0017] Commercial sodium hypochlorite dilution and fusion mode: Based on the online preparation mode of sodium hypochlorite, select at least one dual-purpose storage tank and close the valve between it and the sodium hypochlorite generator, so that the standard concentration sodium hypochlorite prepared by the sodium hypochlorite generator no longer enters the selected dual-purpose storage tank; at the same time, ensure that at least one transfer storage tank remains connected between the sodium hypochlorite generator and the dosing booster pump, thereby maintaining the connection between the sodium hypochlorite generator and the dosing booster pump. The standard concentration sodium hypochlorite in the selected dual-purpose storage tank is emptied by a booster pump. Then, the valve at the outlet pipe of the selected dual-purpose storage tank is closed, and the commercial sodium hypochlorite booster pump is started to transport high-concentration commercial sodium hypochlorite to the selected dual-purpose storage tank for storage. When the standard concentration sodium hypochlorite supplied by the sodium hypochlorite generator is insufficient, the online proportional dilution device receives high-concentration commercial sodium hypochlorite from the selected dual-purpose storage tank. The high-concentration commercial sodium hypochlorite is mixed with the soft water supplied by the soft water inlet pipe in the online proportional dilution device according to the set ratio to form standard concentration sodium hypochlorite. The standard concentration sodium hypochlorite is then transported to the outlet pipe of the sodium hypochlorite generator to supplement the insufficient output of standard concentration sodium hypochlorite from the sodium hypochlorite generator.

[0018] Preferred technical solution: When the sodium hypochlorite generator supplies sufficient standard concentration sodium hypochlorite, the commercial sodium hypochlorite dilution and fusion mode can be activated to dilute the high-concentration commercial sodium hypochlorite in the dual-purpose storage tank to standard concentration sodium hypochlorite in batches for use. This prevents the high-concentration commercial sodium hypochlorite from expiring and becoming ineffective, while also avoiding excessive output of standard concentration sodium hypochlorite due to the large-scale use of high-concentration commercial sodium hypochlorite, thus avoiding shutdown of the sodium hypochlorite generator and reducing the maintenance cost of the sodium hypochlorite generator.

[0019] Preferred technical solution: In both online sodium hypochlorite preparation and commercial sodium hypochlorite dilution and fusion modes, the transfer tank between the sodium hypochlorite generator and the dosing booster pump can be connected independently. After the liquid level in the connected transfer tank reaches the set value, the system can switch to another transfer tank to continue operation, thus avoiding the shutdown of the sodium hypochlorite generator caused by the difference between sodium hypochlorite production and usage, thereby reducing the maintenance cost of the sodium hypochlorite generator.

[0020] Due to the application of the above technical solutions, the beneficial effects of this invention compared with the prior art are as follows: This invention discloses an online sodium hypochlorite preparation and online dilution fusion dosing system and its usage method. The designed dual-purpose storage tank allows the system to use both self-made standard concentration sodium hypochlorite and purchased high-concentration commercial sodium hypochlorite, improving the system's adaptability. The online proportional dilution device can precisely control the concentration of the sodium hypochlorite solution, avoiding errors and risks that may be caused by manual operation. By combining online dilution with the dual-purpose storage tank, the number of devices and the area occupied in the system can be reduced, lowering the manufacturing and operating costs of the system equipment. Through the cooperation of electric valves, flow regulating valves, and flow meters, high-concentration sodium hypochlorite can be automatically diluted and added proportionally. The online dilution combined with the dual-purpose storage tank also allows for the batch use of high-concentration commercial sodium hypochlorite, preventing waste due to spoilage during storage and avoiding excessive sodium hypochlorite production that could limit the operation of the sodium hypochlorite generator due to concentrated use. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the layout of the online preparation and online dilution fusion dosing system for sodium hypochlorite of the present invention.

[0023] In the attached diagrams above, 1 is a sodium hypochlorite generator; 2 is a dosing booster pump; 3 is a transfer storage tank; 4 is a commercial sodium hypochlorite booster pump; 5 is an online proportional dilution device; 51 is a pipeline mixer; 52 is a first flow regulating valve; 53 is a first electric valve; 54 is a first flow meter; 55 is a dilution booster pump; 56 is a second flow regulating valve; 57 is a second flow meter; 6 is a soft water inlet pipe; and 7 is a third flow meter. Detailed Implementation

[0024] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be used interchangeably where appropriate for the description of embodiments of this application herein. Furthermore, the terms "comprising" and "having," and their synonyms, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0026] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0027] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0028] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," "fitting," and "fitting" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Similarly, "fitting" can mean completely or partially fitted. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] Example: like Figure 1As shown, this invention discloses an online preparation and online dilution fusion dosing system for sodium hypochlorite, including a sodium hypochlorite generator 1 and a dosing booster pump 2. Two intermediate storage tanks 3 are connected in parallel via pipelines between the outlet pipe of the sodium hypochlorite generator 1 and the inlet of the dosing booster pump 2. One of the intermediate storage tanks 3 is a dual-purpose tank. It should be noted that in other embodiments, all intermediate storage tanks 3 can be dual-purpose tanks. Valves are installed on both the inlet and outlet pipes of the dual-purpose tanks, and the dual-purpose tanks are connected via pipelines with valves. The product is not connected to the outlet of the commercial sodium hypochlorite booster pump 4 or the inlet of the online proportional dilution device 5. The commercial sodium hypochlorite booster pump 4 is used to transport high-concentration commercial sodium hypochlorite to the dual-purpose storage tank. The inlet of the online proportional dilution device 5 is also connected to the soft water inlet pipe 6, which is used to supply soft water to the online proportional dilution device 5. The outlet of the online proportional dilution device 5 is connected to the outlet pipe of the sodium hypochlorite generator 1 through a pipe with a valve. The specific functions of the main components of the present invention will be described below: Sodium hypochlorite generator 1 is used for online preparation of standard concentration sodium hypochlorite; The addition booster pump 2 is used to transport the sodium hypochlorite solution to the addition point; The transfer storage tank 3 can store standard concentration sodium hypochlorite prepared by sodium hypochlorite generator 1, and the dual-purpose storage tank therein can also store high concentration commercial sodium hypochlorite purchased from outside. The commercial sodium hypochlorite booster pump 4 is used to transport purchased high-concentration commercial sodium hypochlorite to a dual-purpose storage tank. The online proportional dilution device 5 is used to dilute high-concentration commercial sodium hypochlorite to the required concentration according to a specified ratio. The soft water inlet pipe 6 provides soft water for dilution.

[0031] like Figure 1 As shown, the online proportional dilution device 5 includes a pipeline mixer 51. The outlet of the pipeline mixer 51 is connected to the outlet pipe of the sodium hypochlorite generator 1 through a pipeline with a valve. The inlet of the pipeline mixer 51 is connected to a dual-purpose storage tank and a soft water inlet pipe 6 through pipelines. A first flow regulating valve 52, a first electric valve 53, and a first flow meter 54 are provided on the pipeline between the soft water inlet pipe 6 and the pipeline mixer 51 to control the opening and closing of the soft water delivery and the flow rate. A dilution booster pump 55, a second flow regulating valve 56, and a second flow meter 57 are provided on the pipeline between the dual-purpose storage tank and the pipeline mixer 51 to control the opening and closing of the high-concentration commercial sodium hypochlorite delivery and the flow rate.

[0032] like Figure 1 As shown, valves are installed at both the inlet and outlet of the dosing booster pump 2 for convenient control of the dosing system.

[0033] like Figure 1As shown, a third flow meter 7 is installed on the pipeline between the commercial sodium hypochlorite booster pump 4 and the dual-purpose storage tank, which is used to accurately control the storage amount of high-concentration commercial sodium hypochlorite in the dual-purpose storage tank.

[0034] like Figure 1 As shown, there are two or more dual-purpose storage tanks, which facilitates the batch storage of high-concentration commercial sodium hypochlorite.

[0035] like Figure 1 As shown, the usage method and principle of the above-mentioned online sodium hypochlorite preparation and online dilution fusion dosing system are as follows: The dosing system includes two modes: online preparation of sodium hypochlorite and dilution fusion of commercial sodium hypochlorite, as detailed below: Online preparation mode of sodium hypochlorite: Adjust the valves in the system to keep the intermediate storage tank 3 between the sodium hypochlorite generator 1 and the dosing booster pump 2 connected; Start the sodium hypochlorite generator 1 to continuously produce standard concentration sodium hypochlorite and deliver it to the connected transfer storage tank 3; Start the dosing booster pump 2 to extract standard concentration sodium hypochlorite from the transfer storage tank 3 to the dosing location for use; It should be noted that in other embodiments, all transit tanks 3 can also remain connected simultaneously.

[0036] Commercial sodium hypochlorite dilution and blending mode: In the online sodium hypochlorite preparation mode, the valve between the dual-purpose storage tank and the sodium hypochlorite generator 1 is closed, while another transfer storage tank 3 is kept connected between the sodium hypochlorite generator 1 and the dosing booster pump 2. The standard concentration sodium hypochlorite in the selected dual-purpose storage tank is emptied by adding booster pump 2. Then, the valve at the outlet pipe of the selected dual-purpose storage tank is closed, and the commercial sodium hypochlorite booster pump 4 is started to transport high concentration commercial sodium hypochlorite to the selected dual-purpose storage tank.

[0037] When the standard concentration sodium hypochlorite supplied by sodium hypochlorite generator 1 is insufficient, the online proportional dilution device 5 receives high-concentration commercial sodium hypochlorite from the selected dual-purpose storage tank. The high-concentration commercial sodium hypochlorite is mixed with the soft water supplied by the soft water inlet pipe 6 in the online proportional dilution device 5 according to the set ratio to form standard concentration sodium hypochlorite. The standard concentration sodium hypochlorite is then transported to the outlet pipe of sodium hypochlorite generator 1 to supplement the insufficient portion of standard concentration sodium hypochlorite output by sodium hypochlorite generator 1.

[0038] like Figure 1 As shown, when the sodium hypochlorite generator 1 supplies sufficient standard concentration sodium hypochlorite, the commercial sodium hypochlorite dilution and fusion mode can be activated to dilute the high concentration commercial sodium hypochlorite in the dual-purpose storage tank into standard concentration sodium hypochlorite in batches for use.

[0039] like Figure 1 As shown, in both the online preparation of sodium hypochlorite and the dilution and fusion of commercial sodium hypochlorite, the transfer tank 3 between the sodium hypochlorite generator 1 and the dosing booster pump 2 can be connected independently. After the liquid level in the connected transfer tank 3 reaches the set value, the system can be switched to another transfer tank 3 to continue operation.

[0040] The technical solution disclosed in this invention patent has the following advantages over the prior art: 1. High degree of automation and precise control Full-process automation: Through the coordinated control of electric valves, flow regulating valves, flow meters and booster pumps, the preparation, dilution, storage and addition of sodium hypochlorite are fully automated, reducing human intervention and lowering the risk of operational errors.

[0041] Precise dilution ratio: By combining an online proportional dilution device with a flow regulating valve and a flow meter, the flow rates of soft water and sodium hypochlorite are monitored in real time to ensure that the dilution concentration is precise and controllable, avoiding the instability of traditional manual mixing.

[0042] 2. Flexibility and Redundancy Design Flexible switching between dual-purpose storage tanks: At least one of the transfer storage tanks is a "dual-purpose storage tank", which can store standard concentration sodium hypochlorite prepared by the sodium hypochlorite generator, or store high concentration commercial sodium hypochlorite purchased from outside. The system can flexibly switch sources according to needs to adapt to different scenarios (such as equipment failure, emergency replenishment, etc.).

[0043] Parallel operation of multiple storage tanks ensures continuous operation: The transfer storage tanks are designed to be used alternately or as backups for each other through parallel pipelines, avoiding system shutdown due to single tank failure and improving operational stability.

[0044] 3. Safety and Risk Management Avoid direct addition of high-concentration commercial sodium hypochlorite: Use an online dilution device to dilute high-concentration commercial sodium hypochlorite to a safe concentration before addition, reducing the risk of operators directly contacting high-concentration commercial sodium hypochlorite.

[0045] Closed-loop process design: The entire process from preparation and dilution to addition is transported through closed pipelines, reducing the risk of sodium hypochlorite volatilization and leakage, and ensuring a safe working environment.

[0046] 4. Cost-benefit optimization Reduced transportation and storage costs: Allows the direct use of online-prepared standard-concentration sodium hypochlorite, reducing reliance on purchased high-concentration commercial sodium hypochlorite and lowering transportation and storage costs.

[0047] Efficient use of resources: Soft water and high-concentration commercial sodium hypochlorite are precisely mixed as needed to avoid waste caused by excessive dilution or insufficient concentration.

[0048] 5. Rapid response and efficient operation and maintenance Online dynamic adjustment: The system can adjust the sodium hypochlorite dosage in real time according to water quality requirements. Combined with the rapid mixing capability of the pipeline mixer, it can achieve "instant preparation and use" and shorten the response time.

[0049] Ease of maintenance: Modular design (such as independent transfer tanks and switchable pipeline valves) facilitates equipment maintenance and component replacement, reducing downtime.

[0050] 6. Environmental protection Reduce raw material waste: Precise addition and dilution avoid excessive use of sodium hypochlorite, reducing the risk of secondary pollution to the environment.

[0051] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A sodium hypochlorite online preparation and online dilution fusion dosing system, comprising a sodium hypochlorite generator (1) and a dosing booster pump (2), characterized in that: At least two transfer tanks (3) are connected in parallel between the outlet pipe of the sodium hypochlorite generator (1) and the inlet of the dosing booster pump (2). At least one of the transfer tanks (3) is a dual-purpose tank. Both the inlet and outlet pipes of the dual-purpose tank are equipped with valves. The dual-purpose tank is connected to the outlet of the commercial sodium hypochlorite booster pump (4) and the inlet of the online proportional dilution device (5) through pipes with valves. The commercial sodium hypochlorite booster pump (4) is used to transport high-concentration commercial sodium hypochlorite into the dual-purpose tank. The inlet of the online proportional dilution device (5) is also connected to a soft water inlet pipe (6). The soft water inlet pipe (6) is used to provide soft water to the online proportional dilution device (5). The outlet of the online proportional dilution device (5) is connected to the outlet pipe of the sodium hypochlorite generator (1) through a pipe with a valve.

2. The online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 1, characterized in that: The online proportional dilution device (5) includes a pipeline mixer (51). The outlet of the pipeline mixer (51) is connected to the outlet pipe of the sodium hypochlorite generator (1) through a pipeline with a valve. The inlet of the pipeline mixer (51) is connected to the dual-purpose storage tank and the soft water inlet pipe (6) through a pipeline. The pipeline between the soft water inlet pipe (6) and the pipeline mixer (51) is equipped with a first flow regulating valve (52), a first electric valve (53), and a first flow meter (54). The pipeline between the dual-purpose storage tank and the pipeline mixer (51) is equipped with a dilution booster pump (55), a second flow regulating valve (56), and a second flow meter (57).

3. The online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 1, characterized in that: The dosing booster pump (2) is equipped with valves at both the inlet and outlet.

4. The online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 1, characterized in that: A third flow meter (7) is installed on the pipeline between the commercial sodium hypochlorite booster pump (4) and the dual-purpose storage tank.

5. The online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 1, characterized in that: The number of dual-purpose storage tanks is two or more.

6. A method for using the online preparation and online dilution fusion dosing system for sodium hypochlorite, based on the online preparation and online dilution fusion dosing system for sodium hypochlorite according to any one of claims 1 to 5, characterized in that, The process includes two modes: online preparation of sodium hypochlorite and dilution and fusion of commercial sodium hypochlorite. The specific steps are as follows: Sodium hypochlorite online preparation mode: Adjust the valves in the system to keep at least one of the transfer tanks (3) between the sodium hypochlorite generator (1) and the dosing booster pump (2) connected. Start the sodium hypochlorite generator (1) to continuously produce standard concentration sodium hypochlorite and deliver it to the connected transfer tank (3). The dosing booster pump (2) extracts the standard concentration sodium hypochlorite from the transfer tank (3) to the dosing location for use. Commercial sodium hypochlorite dilution and fusion mode: Based on the online preparation mode of sodium hypochlorite, select at least one dual-purpose storage tank and close the valve between it and the sodium hypochlorite generator (1). At the same time, ensure that at least one transfer storage tank (3) is connected between the sodium hypochlorite generator (1) and the dosing booster pump (2). Empty the standard concentration sodium hypochlorite in the selected dual-purpose storage tank through the dosing booster pump (2), then close the valve at the outlet pipe of the selected dual-purpose storage tank, and start the commercial sodium hypochlorite booster pump (4) to deliver high concentration commercial sodium hypochlorite. The sodium hypochlorite is sent to the selected dual-purpose storage tank. When the standard concentration sodium hypochlorite supplied by the sodium hypochlorite generator (1) is insufficient, the online proportional dilution device (5) receives high-concentration commercial sodium hypochlorite from the selected dual-purpose storage tank. The high-concentration commercial sodium hypochlorite and the soft water supplied by the soft water inlet pipe (6) are mixed in the online proportional dilution device (5) according to the set ratio to form standard concentration sodium hypochlorite. The standard concentration sodium hypochlorite is then transported to the outlet pipe of the sodium hypochlorite generator (1) to supplement the insufficient portion of the standard concentration sodium hypochlorite output by the sodium hypochlorite generator (1).

7. The method of using the online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 6, characterized in that: When the sodium hypochlorite generator (1) supplies sufficient standard concentration sodium hypochlorite, the commercial sodium hypochlorite dilution and fusion mode is activated to dilute the high concentration commercial sodium hypochlorite in the dual-purpose storage tank into standard concentration sodium hypochlorite in batches for use.

8. The method of using the online preparation and online dilution fusion dosing system for sodium hypochlorite according to claim 7, characterized in that: In both online sodium hypochlorite preparation and commercial sodium hypochlorite dilution and fusion modes, the transfer tank (3) between the sodium hypochlorite generator (1) and the dosing booster pump (2) is connected separately. After the liquid level in the connected transfer tank (3) reaches the set value, it is switched to another transfer tank (3) to continue operation.

Images