Sodium hypochlorite on-line preparation and on-line dilution fusion dosing system and use method

Abstract

A sodium hypochlorite on-line preparation and on-line dilution fusion feeding system comprises a sodium hypochlorite generator and a feeding lifting pump, at least two transfer storage tanks are connected between a liquid outlet pipe of the sodium hypochlorite generator and a liquid inlet of the feeding lifting pump in parallel through pipelines, at least one of the transfer storage tanks is a dual-purpose storage tank, and the other transfer storage tank is a dual-purpose storage tank. Valves are arranged on a liquid inlet pipe and a liquid outlet pipe of the dual-purpose storage tank; the dual-purpose storage tank is respectively communicated with a liquid outlet of the commercial sodium hypochlorite lifting pump and a liquid inlet of the online proportional dilution device through pipelines with valves; the liquid inlet of the on-line proportional dilution device is also communicated with a soft water inlet pipe; a liquid outlet of the on-line proportional dilution device is communicated with a liquid outlet pipe of the sodium hypochlorite generator through a pipeline with a valve; the invention further discloses a using method of the system. According to the system, the preparation, dilution and adding processes of sodium hypochlorite are integrated together, so that the efficiency and the safety are improved, the equipment cost and the occupied area are reduced, and deterioration waste caused by inconvenience in use of high-concentration commodity sodium hypochlorite is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of sodium hypochlorite preparation, and in particular to a sodium hypochlorite online preparation and online dilution fusion dosing system and a use method thereof. Background Art

[0002] In the water treatment industry, sodium hypochlorite is a commonly used disinfectant. There are two main ways to obtain it: 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, and does not require additional equipment investment. It can be used directly after purchase, which is very convenient. However, sodium hypochlorite is volatile and easily wasteful, and has high transportation and storage costs.

[0004] The raw materials (such as salt) prepared online by the sodium hypochlorite generator have a long storage period and a stable supply. With long-term use, the operating cost of the generator is low; at the same time, the transportation and storage of chemicals are reduced, reducing environmental risks. However, the purchase and installation costs of the generator are high, and the maximum output is limited. When the water quality fluctuates or the usage increases suddenly, it may not be able to meet the demand.

[0005] Many water treatment projects will be equipped with high-concentration commercial sodium hypochlorite and sodium hypochlorite generators at the same time. However, the effective chlorine concentration of commercial sodium hypochlorite is generally 10%, and the effective chlorine concentration of sodium hypochlorite prepared online by the sodium hypochlorite generator is generally 1%, resulting in a 10-fold difference in the flow rate of the corresponding dosing pumps. Therefore, the storage tanks and dosing pumps of the two systems need to be configured independently, resulting in an increase in the number of equipment and a large footprint.

[0006] According to GB50013-2018 "Outdoor Water Supply Design Standard", the storage period of high-concentration commercial sodium hypochlorite should not exceed 7 days, otherwise it will be wasted due to volatilization and deterioration. In addition, the continuous use of large amounts of commercial sodium hypochlorite may cause the generator to be out of service for a long time, reduce equipment utilization, and increase production and maintenance costs.

[0007] Therefore, in view of the shortcomings of the prior art, it is necessary to design a sodium hypochlorite online preparation and online dilution fusion dosing system and a method of use to solve the above problems.

[0008] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solution of the present invention and facilitating the understanding of those skilled in the art. It cannot be considered that the above contents are well known to those skilled in the art simply because they are explained in the background technology of the present invention. Summary of the invention

[0009] In order to overcome the deficiencies in the above-mentioned prior art, the present invention aims to disclose a sodium hypochlorite online preparation and online dilution fusion dosing system and a method of use, which is used to solve the problems of a large number of equipment, a large occupied area and high maintenance cost when two sodium hypochlorite supply systems, namely, a high-concentration commercial sodium hypochlorite and an online preparation sodium hypochlorite generator, are used simultaneously.

[0010] The invention discloses a sodium hypochlorite online preparation and online dilution fusion dosing system, comprising a sodium hypochlorite generator and a dosing booster pump. The sodium hypochlorite generator is used for preparing sodium hypochlorite of standard concentration on site; and the dosing booster pump is used for transporting the sodium hypochlorite to a dosing point.

[0011] At least two transfer tanks are connected in parallel between the liquid outlet pipe of the sodium hypochlorite generator and the liquid inlet of the dosing lift pump through a pipeline. At least one of the transfer tanks is a dual-purpose tank. The liquid inlet pipe and the liquid outlet pipe of the dual-purpose tank are both provided with valves. The dual-purpose tank is connected to the liquid outlet of the commercial sodium hypochlorite lift pump through a pipeline with a valve, so that the dual-purpose tank can switch to store homemade standard concentration sodium hypochlorite or purchased high-concentration commercial sodium hypochlorite as needed. The dual-purpose tank is also connected to the liquid inlet of the online proportional dilution device through a pipeline with a valve. The liquid inlet of the online proportional dilution device is also connected to the soft water inlet pipe, which is used to provide soft water to the online proportional dilution device; the liquid outlet of the online proportional dilution device is connected to the liquid outlet pipe of the sodium hypochlorite generator through a pipeline with a valve, and the high-concentration sodium hypochlorite solution can be diluted to the required concentration in proportion through the online proportional dilution device.

[0012] The preferred technical solution is as follows: the online proportional dilution device comprises a pipeline mixer, the liquid outlet of the pipeline mixer is connected to the liquid outlet pipe of the sodium hypochlorite generator through a pipeline with a valve, the liquid inlet of the pipeline mixer is respectively connected to the dual-purpose storage tank and the soft water inlet pipe through pipelines, a first flow regulating valve, a first electric valve and a first flow meter are arranged on the pipeline between the soft water inlet pipe and the pipeline mixer; a dilution lift pump, a second flow regulating valve and a second flow meter are arranged on the pipeline between the dual-purpose storage tank and the pipeline mixer, and the automatic dilution and dosing of high-concentration sodium hypochlorite in proportion can be realized through the cooperation of the electric valve, the flow regulating valve and the flow meter.

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

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

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

[0016] The present invention also discloses a method for using the sodium hypochlorite online preparation and online dilution fusion dosing system, including two modes of sodium hypochlorite online preparation and commercial sodium hypochlorite dilution fusion, and the specific steps are as follows: Online preparation mode of sodium hypochlorite: adjust the valve in the system to keep at least one of the transfer tanks between the sodium hypochlorite generator and the dosing lift pump connected, start the sodium hypochlorite generator to continuously produce sodium hypochlorite of standard concentration and transport it to the connected transfer tank, and the dosing lift pump draws the sodium hypochlorite of standard concentration in the transfer tank to the dosing location for use.

[0017] Commercial sodium hypochlorite dilution and fusion mode: Based on the sodium hypochlorite online preparation mode, select at least one dual-purpose storage tank to 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 tank is connected between the sodium chlorate generator and the dosing lift pump, thereby maintaining a connected state between the sodium hypochlorite generator and the dosing lift pump. The standard concentration sodium hypochlorite in the selected dual-purpose storage tank is emptied by the dosing booster pump, and then the valve at the liquid outlet pipe of the selected dual-purpose storage tank is closed, and the commercial sodium hypochlorite booster pump is started to transport the 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 the high-concentration commercial sodium hypochlorite from the selected dual-purpose storage tank, and the high-concentration commercial sodium hypochlorite and the soft water provided by the soft water inlet pipe are mixed into the standard concentration sodium hypochlorite in the online proportional dilution device according to the set ratio, and the standard concentration sodium hypochlorite is transported to the liquid outlet pipe of the sodium hypochlorite generator to supplement the insufficient part of the standard concentration sodium hypochlorite output by the sodium hypochlorite generator.

[0018] The preferred technical solution is: when the sodium hypochlorite generator supplies sufficient sodium hypochlorite of standard concentration, 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, thereby preventing the high-concentration commercial sodium hypochlorite from expiring and becoming ineffective, while also preventing the large-scale use of high-concentration commercial sodium hypochlorite from causing excessive output of standard-concentration sodium hypochlorite, thereby avoiding shutdown of the sodium hypochlorite generator and reducing the maintenance cost of the sodium hypochlorite generator.

[0019] Preferred technical solution: In the two modes of online preparation of sodium hypochlorite and dilution and fusion of commercial sodium hypochlorite, the transfer tank between the sodium hypochlorite generator and the dosing lift pump can be connected separately. After the liquid level in the connected transfer tank reaches the set value, it switches to other transfer tanks to continue the operation, avoiding the shutdown of the sodium hypochlorite generator caused by the difference between the output and use of sodium hypochlorite, thereby reducing the maintenance cost of the sodium hypochlorite generator.

[0020] Due to the application of the above technical solution, the present invention has the following beneficial effects compared with the prior art: The invention discloses an online preparation and online dilution fusion dosing system for sodium hypochlorite and a use method thereof. The designed dual-purpose storage tank enables the system to use both homemade sodium hypochlorite with standard concentration and purchased high-concentration commercial sodium hypochlorite, thereby improving the adaptability of the system. An online proportional dilution device is adopted to accurately control the concentration of the sodium hypochlorite solution, thereby avoiding errors and risks that may be caused by manual operation. The online dilution is matched with the dual-purpose storage tank, thereby reducing the number of devices in the system and the occupied area, thereby reducing the manufacturing and use costs of system equipment. The high-concentration sodium hypochlorite can be automatically diluted and added in proportion by matching an electric valve, a flow regulating valve and a flow meter. The online dilution is matched with the dual-purpose storage tank, thereby realizing batch use of high-concentration commercial sodium hypochlorite, thereby preventing waste caused by storage deterioration of high-concentration commercial sodium hypochlorite, and also avoiding excessive sodium hypochlorite output that is restricted to the operation of a sodium hypochlorite generator due to concentrated use at one time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0023] In the above drawings, 1, sodium hypochlorite generator; 2, dosing lift pump; 3, transfer storage tank; 4, commercial sodium hypochlorite lift pump; 5, online proportional dilution device; 51, pipeline mixer; 52, first flow regulating valve; 53, first electric valve; 54, first flow meter; 55, dilution lift pump; 56, second flow regulating valve; 57, second flow meter; 6, soft water inlet pipe; 7, third flow meter. DETAILED DESCRIPTION

[0024] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0025] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application are described here. In addition, the terms "including" and "having" and their synonyms are intended to cover non-exclusive inclusions, for example, the process, method, system, product or equipment comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0026] In the present application, the terms "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings. These terms are mainly used to better describe the present invention and its embodiments, and are not used to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation.

[0027] In addition, some of the above terms may be used to express other meanings in addition to indicating orientation or positional relationship. For example, the term "on" may also be used to express a certain dependency or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the present invention can be understood according to specific circumstances.

[0028] In addition, the terms "install", "set", "provided with", "connect", "connected", "sleeved", and "fitted" should be understood in a broad sense. 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, elements, or components. For another example, "fitted" can be completely close or partially close. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] Example: like Figure 1As shown, the present invention discloses an online preparation and online dilution fusion dosing system of sodium hypochlorite, comprising a sodium hypochlorite generator 1 and a dosing lift pump 2. Two transfer tanks 3 are connected in parallel between the liquid outlet pipe of the sodium hypochlorite generator 1 and the liquid inlet of the dosing lift pump 2 through a pipeline. One of the transfer tanks 3 is a dual-purpose tank. It should be noted that in other embodiments, all the transfer tanks 3 can be dual-purpose tanks; valves are provided on the liquid inlet pipe and the liquid outlet pipe of the dual-purpose tank, and the dual-purpose tank is divided into two parts by a pipeline with a valve. The liquid inlet of the online proportional dilution device 5 is also connected to the soft water inlet pipe 6, which is used to provide soft water to the online proportional dilution device 5; the liquid outlet of the online proportional dilution device 5 is connected to the liquid outlet pipe of the sodium hypochlorite generator 1 through a pipeline with a valve. The main components of the present invention are described in detail below: The sodium hypochlorite generator 1 is used for preparing sodium hypochlorite of standard concentration online; The dosing booster pump 2 is used to transport the sodium hypochlorite solution to the dosing point; The transfer tank 3 can store the standard concentration sodium hypochlorite prepared by the sodium hypochlorite generator 1, and the dual-purpose storage tank therein can also store the purchased high-concentration commercial sodium hypochlorite; The commercial sodium hypochlorite lifting pump 4 is used to transport the purchased high-concentration commercial sodium hypochlorite to the dual-purpose storage tank; The online proportional dilution device 5 is used to dilute the high-concentration commercial sodium hypochlorite to the required concentration in proportion; 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 liquid outlet of the pipeline mixer 51 is connected to the liquid outlet pipe of the sodium hypochlorite generator 1 through a pipeline with a valve, and the liquid inlet of the pipeline mixer 51 is connected to the dual-purpose storage tank and the soft water inlet pipe 6 respectively 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, which are used to control the opening and closing and flow rate of the soft water delivery; a dilution boost 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, which are used to control the opening and closing and flow rate of the high-concentration commercial sodium hypochlorite delivery.

[0032] like Figure 1 As shown, valves are provided at the liquid inlet and the liquid 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 provided on the pipeline between the commercial sodium hypochlorite lifting 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, the number of dual-purpose storage tanks is two or more, which is convenient for batch storage of high-concentration commercial sodium hypochlorite.

[0035] like Figure 1 As shown, the use method and principle of the above-mentioned sodium hypochlorite online 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 follows: Sodium hypochlorite online preparation mode: Adjust the valve in the system to keep a transfer tank 3 between the sodium hypochlorite generator 1 and the dosing booster pump 2 connected; Start the sodium hypochlorite generator 1 to continuously produce sodium hypochlorite of standard concentration and transport it to the connected transfer storage tank 3; Start the dosing booster pump 2 to extract the standard concentration sodium hypochlorite in the transfer tank 3 to the dosing location for use; It should be noted that, in other embodiments, all transfer tanks 3 can also remain in a connected state at the same time.

[0036] Commercial sodium hypochlorite dilution and fusion mode: In the sodium hypochlorite online preparation mode, a dual-purpose storage tank is selected to close the valve between it and the sodium hypochlorite generator 1, and at the same time, another transfer storage tank 3 is kept in a connected state between the sodium chlorate generator 1 and the dosing booster pump 2; The standard concentration sodium hypochlorite in the selected dual-purpose storage tank is emptied by the dosing booster pump 2, and then the valve at the liquid outlet pipe of the selected dual-purpose storage tank is closed, and the commercial sodium hypochlorite booster pump 4 is started to transport the high-concentration commercial sodium hypochlorite to the selected dual-purpose storage tank.

[0037] When the sodium hypochlorite generator 1 supplies insufficient sodium hypochlorite of standard concentration, the online proportional dilution device 5 receives high-concentration commercial sodium hypochlorite from the selected dual-purpose storage tank, and the high-concentration commercial sodium hypochlorite and the soft water provided by the soft water inlet pipe 6 are mixed into sodium hypochlorite of standard concentration in the online proportional dilution device 5 according to a set ratio, and the sodium hypochlorite of standard concentration is transported to the liquid outlet pipe of the sodium hypochlorite generator 1 to supplement the insufficient part of the sodium hypochlorite of standard concentration output by the sodium hypochlorite generator 1.

[0038] like Figure 1 As shown, when the sodium hypochlorite generator 1 supplies sufficient sodium hypochlorite of standard concentration, 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 for use in batches.

[0039] like Figure 1 As shown, in the two modes of online preparation of sodium hypochlorite and dilution and fusion of commercial sodium hypochlorite, the transfer tank 3 between the sodium hypochlorite generator 1 and the dosing lift pump 2 can be connected separately, and after the liquid level in the connected transfer tank 3 reaches the set value, it switches to other transfer tanks 3 to continue the operation.

[0040] The technical solution disclosed in the patent of this invention has the following advantages over the prior art: 1. High degree of automation and precise control Full process automation: Through the linkage control of electric valves, flow control valves, flow meters and lifting pumps, the full process of preparation, dilution, storage and addition of sodium hypochlorite is automated, reducing manual intervention and the risk of operational errors.

[0041] Accurate dilution ratio: Through the online proportional dilution device combined with the flow control valve and flow meter, the flow of soft water and sodium hypochlorite is monitored in real time to ensure that the dilution concentration is accurately controllable and avoid the instability of traditional manual mixing.

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

[0043] Multiple storage tanks in parallel ensure continuous operation: The transfer tanks are designed in parallel through pipelines, which can be used alternately or as backup for each other, avoiding system shutdown due to single tank failure and improving operation 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 process design: The whole process from preparation, dilution to addition is transported through closed pipelines to reduce the volatilization and leakage risks of sodium hypochlorite and ensure the safety of the working environment.

[0046] 4. Cost-effectiveness optimization Reduce transportation and storage costs: Allows direct use of standard concentration sodium hypochlorite prepared online, reduces dependence on purchased high-concentration commercial sodium hypochlorite, and reduces transportation and storage costs.

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

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

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

[0050] 6. Environmental protection Reduce the waste of raw materials: accurate dosing and dilution can avoid excessive use of sodium hypochlorite and reduce the risk of secondary pollution to the environment.

[0051] Finally, it should be noted that the above are only 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 aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in 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 liquid outlet pipe of the sodium hypochlorite generator (1) and the liquid inlet of the dosing lift pump (2) through a pipeline. At least one of the transfer tanks (3) is a dual-purpose tank. The liquid inlet pipe and the liquid outlet pipe of the dual-purpose tank are both provided with valves. The dual-purpose tank is connected to the liquid outlet of the commercial sodium hypochlorite lift pump (4) and the liquid inlet of the online proportional dilution device (5) through a pipeline with a valve. The commercial sodium hypochlorite lift pump (4) is used to transport high-concentration commercial sodium hypochlorite into the dual-purpose tank. The liquid 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 liquid outlet of the online proportional dilution device (5) is connected to the liquid outlet pipe of the sodium hypochlorite generator (1) through a pipeline with a valve.

2. The sodium hypochlorite online preparation and online dilution fusion dosing system according to claim 1, characterized in that: The online proportional dilution device (5) comprises a pipeline mixer (51), wherein a liquid outlet of the pipeline mixer (51) is connected to a liquid outlet pipe of the sodium hypochlorite generator (1) via a pipeline with a valve, and a liquid inlet of the pipeline mixer (51) is connected to the dual-purpose storage tank and the soft water inlet pipe (6) respectively via pipelines, and 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); and a dilution boost 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).

3. The sodium hypochlorite online preparation and online dilution fusion dosing system according to claim 1, characterized in that: Valves are provided at the liquid inlet and the liquid outlet of the dosing and lifting pump (2).

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

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

6. A method for using a sodium hypochlorite online preparation and online dilution fusion dosing system, based on the sodium hypochlorite online preparation and online dilution fusion dosing system according to any one of claims 1 to 5, characterized in that: It 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: adjusting the valve in the system so that at least one of the transfer tanks (3) between the sodium hypochlorite generator (1) and the dosing lift pump (2) remains connected, starting the sodium hypochlorite generator (1) to continuously produce sodium hypochlorite of standard concentration and transport it to the connected transfer tank (3), and the dosing lift pump (2) extracts the sodium hypochlorite of standard concentration in the transfer tank (3) to the dosing location for use; Commercial sodium hypochlorite dilution and fusion mode: Based on the sodium hypochlorite online preparation mode, at least one dual-purpose storage tank is selected to close the valve between it and the sodium hypochlorite generator (1), and at the same time, at least one transfer storage tank (3) is ensured to be connected between the sodium chlorate generator (1) and the dosing booster pump (2). The standard concentration sodium hypochlorite in the selected dual-purpose storage tank is emptied through the dosing booster pump (2), and then the valve at the liquid outlet pipe of the selected dual-purpose storage tank is closed, and the commercial sodium hypochlorite booster pump (4) is started to transport the high-concentration commercial sodium hypochlorite. 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 provided by the soft water inlet pipe (6) are mixed in the online proportional dilution device (5) according to a set ratio to form standard concentration sodium hypochlorite, and the standard concentration sodium hypochlorite is transported to the liquid outlet pipe of the sodium hypochlorite generator (1) to supplement the insufficient part of the standard concentration sodium hypochlorite output by the sodium hypochlorite generator (1).

7. The method for using the sodium hypochlorite online preparation and online dilution fusion dosing system according to claim 6, characterized in that: When the sodium hypochlorite generator (1) supplies sufficient sodium hypochlorite of standard concentration, 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 for use in batches.

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

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