Online monitor and system for evaluating operation efficiency of chlorine dioxide generator

Abstract

The utility model relates to an on-line monitor and system for evaluating the operation efficiency of a chlorine dioxide generator, a water sample detection module and a data analysis module are arranged in a body, and the water sample detection module is electrically connected with the data analysis module; the water sample detection module comprises a chlorine dioxide detection unit, a free chlorine detection unit and a plurality of linear peristaltic pumps; the chlorine dioxide and free chlorine detection unit is provided with a dilution tank, a detection tank, a reference tank and a spectrophotometer; the water sample detection module is provided with a buffer solution bottle, a DPD solution bottle and a glycine solution bottle which are used for containing the buffer solution, the DPD solution and the glycine solution respectively, and each solution bottle is connected with the corresponding linear peristaltic pump through a hose. The monitor disclosed by the utility model has two modes of health monitoring and abnormity diagnosis, and can continuously track and record the operation efficiency of the chlorine dioxide generator; the operation efficiency of the chlorine dioxide generator can be rapidly analyzed, problems and risks can be identified, an alarm is given, and the safety and stability of the disinfection process are improved.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment, specifically relating to an online monitoring instrument and system for evaluating the operational efficiency of chlorine dioxide generators. Background Technology

[0002] With the increasing scarcity of water resources, water conservation and water disinfection have become important environmental protection issues. Among existing technologies, chlorine dioxide (ClO2) is classified as an A1-level safe disinfectant by the World Health Organization (WHO) due to its safe, broad-spectrum, and highly effective bactericidal properties, and it has been widely used in the field of water treatment.

[0003] Due to the unstable nature of ClO2, it may explode upon increased temperature or exposure to light, making it unsuitable for long-distance transportation. It is typically prepared on-site using a chlorine dioxide generator for disinfection. Currently, domestic water / sewage treatment plants commonly use the chlorate method to prepare ClO2 (main reaction equation: ...).

[0004] The reaction 2NaClO3 + 4HCl → 2ClO2↑ + Cl2↑ + 2NaCl + 2H2O indicates that this method actually prepares a high-concentration mixture of ClO2, Cl2, and water. Furthermore, when the ratio of chlorate to hydrochloric acid in the raw materials is unreasonable, side reactions often occur. For example, if the hydrochloric acid content is too high, a higher proportion of chlorine gas will be generated (side reaction equation: NaClO3 + 6HCl → 3Cl2↑ + NaCl + 3H2O).

[0005] According to GB / T 5750.11-2023 "Standard Test Methods for Drinking Water - Part 11: Disinfectant Indicators", domestic water plants / sewage treatment plants typically use the N,N-diethyl-p-phenylenediamine (DPD) spectrophotometric method to determine ClO2 and free chlorine in the effluent from contact disinfection tanks. That is, it can only directly measure low concentrations of ClO2 (0–5.50 mg / L) and low concentrations of free chlorine (0.02–2.00 mg / L, including Cl2 and ClO- / HClO formed by its dissolution in water). Therefore, it is not suitable for measuring high concentrations of ClO2 and free chlorine in the ClO2 and free chlorine mixture in chlorine dioxide dosing systems. Furthermore, while this method can mask the influence of free chlorine by adding glycine to the water sample when determining the ClO2 concentration in a mixture of ClO2 and free chlorine, it also interferes with the determination of free chlorine concentration because ClO2 reacts rapidly with DPD to produce a color change. Therefore, accurately evaluating the operational efficiency of chlorine dioxide generators (including ClO2 and free chlorine production, ClO2 conversion rate, and the proportion of the main reaction) is challenging. A method for determining the free chlorine concentration in high-concentration ClO2 and free chlorine mixtures needs to be established and implemented for online monitoring. Summary of the Invention

[0006] To address the shortcomings of the existing technology, this invention proposes an online monitoring instrument for evaluating the operational efficiency of chlorine dioxide generators. This instrument is capable of real-time monitoring of the concentrations of both ClO2 and free chlorine in the high-concentration ClO2 and free chlorine mixture in the chlorine dioxide dosing system of water plants / sewage treatment plants, thereby achieving precise control of the chlorine dioxide dosage during disinfection.

[0007] To solve the aforementioned technical problem, the present invention adopts the following technical solution:

[0008] An online monitoring instrument for evaluating the operational efficiency of a chlorine dioxide generator includes a main body, which includes a housing. The main body is characterized by housing a water sample detection module and a data analysis module, which are electrically connected. The water sample detection module includes a chlorine dioxide detection unit and a free chlorine detection unit, each equipped with several linear peristaltic pumps. Both the chlorine dioxide and free chlorine detection units are equipped with a dilution tank, a detection tank, a reference tank, and a spectrophotometer.

[0009] The water sample testing module is equipped with buffer solution bottles, DPD solution bottles and glycine solution bottles, which are used to hold buffer solution, DPD solution and glycine solution respectively. Each solution bottle is connected to the corresponding linear peristaltic pump through a hose.

[0010] When monitoring is started, the reagents are first added to the detection chambers and reference chambers of the chlorine dioxide detection unit and the free chlorine detection unit under the action of the linear peristaltic pump group.

[0011] Subsequently, under the action of the linear peristaltic pump group, the monitor draws the mixture from the dosing tube and introduces it into two sample dilution pools through the sample inlet tube below the monitor. According to the dilution ratio (1 to 100 times) preset by the user in the data processing unit, the monitor automatically draws the corresponding pure water to rapidly dilute the mixture sample.

[0012] Then, the diluted sample was quickly injected into the two detection cells using a linear peristaltic pump; at the same time, an equal volume of pure water was drawn and injected into the reference cell.

[0013] Under the action of a magnetic stir bar, the sample undergoes a colorimetric reaction with the DPD. After 2 minutes, a dual-beam spectrophotometer records the absorbance difference between the detection cell and the reference cell. After the detection is completed, the sample is discharged through the outlet, and the detection unit automatically draws pure water to clean all pipelines in the sample dilution cell, detection cell, and reference cell, preparing for the next round of detection.

[0014] Thus, this online monitoring instrument, through automatic dilution, enables the system to directly process high-concentration samples collected on-site without additional pretreatment steps, greatly improving the practicality and convenience of the monitoring system. This invention, through dual channels, can simultaneously detect the concentrations of both ClO2 and free chlorine in a high-concentration ClO2 and free chlorine mixture.

[0015] Furthermore, the data analysis module mainly includes a display screen, a data processing unit, a data transmission unit, a monitoring system, and an alarm system. The data processing unit is electrically connected to the spectrophotometer of the water sample detection module, collects the detection data obtained by the spectrophotometer, and performs calculations and analysis according to the built-in software and programs. The display screen, data transmission unit, monitoring system, and alarm system are all electrically connected to the data processing unit. The data analysis module has high intelligent analysis and processing capabilities, can display relevant data, and can issue alarm signals when necessary.

[0016] Furthermore, the water sample detection module is located at the lower part of the main body, while the data analysis module is located at the upper part. This arrangement facilitates the detection and analysis processes and represents an optimized design and layout for the overall structure.

[0017] Furthermore, the spectrophotometer is a dual-beam spectrophotometer.

[0018] Furthermore, the water sample detection module is equipped with a buffer solution bottle, a DPD solution bottle, and a glycine solution bottle.

[0019] The online monitoring system for evaluating the operational efficiency of a chlorine dioxide generator includes the aforementioned online monitoring instrument for evaluating the operational efficiency of the chlorine dioxide generator. It is installed in conjunction with the chlorine dioxide generator and the contact disinfection tank. The chlorine dioxide generator is connected to a water jet injector via a chlorine dioxide delivery pipe. The pipe downstream of the water jet injector is the chlorine dioxide dosing pipe. The online monitoring instrument for evaluating the operational efficiency of the chlorine dioxide generator is connected to the chlorine dioxide dosing pipe via a sampling pipe. The sampling pipe is connected to a linear peristaltic pump. The linear peristaltic pump draws the required dose from the chlorine dioxide dosing pipe through the sampling pipe and delivers it to the dilution tank through the inlet pipe. The chlorine dioxide dosing pipe leads into the contact disinfection tank.

[0020] In this way, the online monitoring instrument of this utility model, when used in conjunction with the chlorine dioxide generator and the clear water tank, can monitor the concentrations of both ClO2 and free chlorine in the high-concentration ClO2 and free chlorine mixture in the chlorine dioxide dosing system of the water plant / sewage treatment plant in real time, thereby achieving precise control of the amount of chlorine dioxide added during the disinfection process.

[0021] Furthermore, the chlorine dioxide generator is equipped with raw material containers, mainly including hydrochloric acid containers and hypochlorous acid containers.

[0022] Furthermore, the online monitoring instrument for evaluating the operational efficiency of the chlorine dioxide generator is installed downstream of the water jet outlet, at a distance of 1.5m to 3m.

[0023] Compared with the prior art, the online monitoring instrument for evaluating the operating efficiency of a chlorine dioxide generator, as described in this utility model, has the following technical features:

[0024] 1. This utility model's online monitoring instrument incorporates automatic dilution technology, enabling the system to directly process high-concentration samples collected on-site without additional pretreatment steps, greatly improving the practicality and convenience of the monitoring system. This utility model patent uses dual-channel detection to determine the concentrations of both ClO2 and free chlorine in a high-concentration ClO2 and free chlorine mixture, and corrects the measured concentration of free chlorine using a quadratic polynomial equation fitted to a hypersurface, thereby obtaining the corrected concentration of free chlorine.

[0025] 2. This utility model realizes the monitoring of the operational performance of a chlorine dioxide generator, including health monitoring and anomaly diagnosis. In health monitoring mode, the monitoring system can continuously track and record the operational performance of the chlorine dioxide generator according to the user-preset time frame. Through long-term diagnostic analysis, the system can capture the dynamic change curve of ClO2 conversion rate with the operating time of the equipment. When the ClO2 conversion rate gradually decreases to 80% of the initial ClO2 conversion rate during equipment operation, the system will automatically remind the user and provide feedback on the performance degradation of the equipment. Furthermore, when the conversion rate drops to 70%, the system will trigger an alarm, warning the user to immediately check and maintain the equipment to prevent a significant reduction in disinfection effect and ensure water quality safety. When the residual chlorine value in the effluent of a water plant / sewage treatment plant is abnormal, it means that either the effluent quality or the chlorine dioxide generator may be abnormal. At this time, rapid fault diagnosis of the chlorine dioxide generator is particularly critical. Once the central control room receives an abnormal signal, the monitoring system will automatically switch to anomaly diagnosis mode. In anomaly diagnosis mode, the system utilizes advanced sensors and algorithms to rapidly analyze the generator's operational performance (including ClO2 production, ClO2 conversion rate, and main reaction ratio) to identify problems and risks. Once a generator fault is identified, the data transmission unit immediately relays the anomaly results to the central control room. The alarm system issues on-site warnings through various means, including but not limited to audible alarms, flashing lights, or screen prompts, to ensure operators notice the problem promptly and take appropriate action. Furthermore, the anomaly diagnosis mode provides data logging and trend analysis, helping maintenance teams track historical data on problems, analyze the frequency and severity of issues, and thus develop more effective maintenance plans and preventative measures.

[0026] In summary, this utility model patent can monitor the concentrations of both ClO2 and free chlorine in the high-concentration ClO2 and free chlorine mixture in the chlorine dioxide dosing system of water plants / sewage treatment plants in real time, achieving precise control of the chlorine dioxide dosage during disinfection. It can also perform regular health monitoring of the chlorine dioxide generator (by monitoring the ClO2 conversion rate as a function of generator usage time) and quickly diagnose whether the chlorine dioxide generator is malfunctioning when the residual chlorine level in the effluent from the water plant / sewage treatment plant is abnormally low (by rapidly measuring ClO2 production, conversion rate, and the proportion of the main reaction). Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of the monitoring instrument of this utility model;

[0028] Figure 2 This is a front view of the internal structure of the monitoring instrument of this utility model;

[0029] Figure 3 A simplified diagram of the internal connection structure of the detector of this utility model;

[0030] Figure 4 This is a schematic diagram of the monitoring instrument system of this utility model.

[0031] In the diagram: 1—Main body, 2—Water sample detection module, 3—Data analysis module, 4—Chlorine dioxide detection unit, 5—Free chlorine detection unit, 6—Linear peristaltic pump, 7—Dilution tank, 8—Detection tank, 9—Reference tank, 10—Spectrophotometer, 11—Buffer solution bottle, 12—DPD solution bottle, 13—Glycine solution bottle, 14—Hose, 15—Sample inlet tube, 16—Magnetic stirring device, 20—Chlorine dioxide generator, 21—Raw material container, 22—Chlorine dioxide delivery tube, 23—Water jet injector, 24—Chlorine dioxide dosing tube, 25—Contact disinfection tank, 26—Outlet pipe. Detailed Implementation

[0032] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0033] Please refer to Figure 1 , 2As shown in Figures 3 and 4, the online monitoring instrument for evaluating the operating efficiency of a chlorine dioxide generator provided in this embodiment of the present invention includes a main body 1, which includes a housing. A water sample detection module 2 and a data analysis module 3 are provided inside the main body 1 (or inside the housing). The water sample detection module 2 and the data analysis module 3 are electrically connected. A spectrophotometer converts the light intensity signal into an electrical signal and transmits it to the data analysis module 3.

[0034] The water sample testing module 2 is typically located at the lower part of the main body 1, and includes a chlorine dioxide detection unit 4 and a free chlorine detection unit 5. Both the chlorine dioxide detection unit 4 and the free chlorine detection unit 5 are equipped with several linear peristaltic pumps 6 for sample dilution, sample injection, and reagent dosing, etc., and are connected to solution bottles (reagent bottles) and / or chambers via hoses 14. Both the chlorine dioxide detection unit 4 and the free chlorine detection unit 5 are equipped with a dilution tank 7, a detection tank 8, a reference tank 9, and a spectrophotometer 10. The dilution tank 7 and the detection tank 8... The reference cell 9 is also equipped with a magnetic stirring device 16 for stirring; the spectrophotometer 10 can be an existing double-beam spectrophotometer, which generates corresponding light during detection, converts the light intensity signal into an electrical signal, records the absorbance difference between the detection cell 8 and the reference cell 9, and inputs the detected parameters into the data analysis module 3; after the detection is completed, the liquid in the dilution cell 7, the detection cell 8 and the reference cell 9 is drained, and pure water is drawn up for rinsing under the action of the corresponding linear peristaltic pump 6, in preparation for the next round of detection.

[0035] The water sample testing module 2 is equipped with a buffer solution bottle 11, a DPD solution bottle 12, and a glycine solution bottle 13, which are used to hold the buffer solution, DPD solution (N,N-diethyl-p-phenylenediamine), and glycine solution, respectively. Each solution bottle is connected to a corresponding linear peristaltic pump 6 through a hose 14. The required amount is accurately drawn by the suction action of the linear peristaltic pump 6 and then transported to the testing cell 8 or the reference cell 9 through the hose 14.

[0036] The dilution tank 7 is connected to a linear peristaltic pump 6 via a sample inlet pipe 15. In use, the linear peristaltic pump 6 draws the sample from the dosing tube through the sample inlet pipe 15 and delivers it to the dilution tank 7. According to the user-preset dilution ratio, the required amount of pure water is drawn by the linear peristaltic pump 6 to perform rapid gradient dilution of the sample.

[0037] The data analysis module 3 of this utility model is typically located on the upper part of the main body 1, and mainly includes a display screen, a data processing unit, a data transmission unit, a monitoring system, and an alarm system. The data processing unit is electrically connected to the water sample detection module 2, and in this embodiment, it is electrically connected to the spectrophotometer 10. It is responsible for collecting the detection data obtained by the spectrophotometer 10 and performing calculations and analyses according to the built-in software and programs to obtain key detection indicators, including ClO2 concentration, corrected free chlorine concentration, ClO2 and free chlorine production, ClO2 conversion rate (its curve changing with equipment operating time), and the proportion of the main reaction, etc. The display screen, data transmission unit, monitoring system, and alarm system are electrically connected to the data processing unit, respectively used to display and transmit detection data, and input the detection data into the monitoring and alarm systems, issuing audible and visual alarm signals when necessary. These results can be intuitively displayed on the display screen electrically connected to the data processing unit and sent to the central control room of the water plant / sewage treatment plant via the data transmission unit.

[0038] The monitoring system features two modes: health monitoring and anomaly diagnosis. Users can select the appropriate mode based on their specific needs. In health monitoring mode, the system continuously tracks and records the operational efficiency of the chlorine dioxide generator, capturing key indicators such as dynamic changes in ClO2 conversion rate and the proportion of the main reaction. In anomaly diagnosis mode, the system quickly analyzes the operational efficiency of the chlorine dioxide generator, identifying problems and instability. The collection and analysis of this data helps to understand the operating status of the chlorine dioxide generator, thereby providing targeted guidance for maintenance.

[0039] The online monitoring system for evaluating the operational efficiency of a chlorine dioxide generator of this invention includes the aforementioned online monitoring instrument for evaluating the operational efficiency of a chlorine dioxide generator, a chlorine dioxide generator 20, and a contact disinfection tank 25, which are configured in conjunction with the chlorine dioxide generator 20 and the contact disinfection tank 25. The chlorine dioxide generator 20 is typically equipped with a raw material container 21, mainly including a hydrochloric acid container and a hypochlorous acid container, which react to produce ClO2 gas. The ClO2 gas produced by the chlorine dioxide generator 20 is connected to a water jet injector 23 through a chlorine dioxide delivery pipe 22. The pipe behind the water jet injector 23 is a chlorine dioxide dosing pipe 24. The online monitoring instrument for evaluating the operational efficiency of the chlorine dioxide generator of this invention is connected to the chlorine dioxide dosing pipe 24 through a sample inlet pipe 15. The sample inlet pipe 15 is connected to a linear peristaltic pump 6. The linear peristaltic pump 6 draws the required dose from the chlorine dioxide dosing pipe 24 through the sample inlet pipe 15 and rapidly gradient dilutes the sample according to a preset dilution ratio in a delivery dilution tank 7.

[0040] The chlorine dioxide dosing pipe 24 is introduced into the contact disinfection tank 25 to introduce a high-concentration ClO2 and Cl2 mixture into the contact disinfection tank 25. Inside the contact disinfection tank 25, multiple detection areas are set up as needed, such as the first detection area, the second detection area, the third detection area, etc., to facilitate the smooth progress of the detection work. The contact disinfection tank 25 is equipped with an outlet pipe 26, which is connected to other water treatment structures.

[0041] The online monitoring instrument of this invention is installed at a certain distance downstream of the outlet of the water jet 23, such as 1.5m-3m, which is connected to the chlorine dioxide generator 20 and the chlorine dioxide dosing pipe 24. It simultaneously and quantitatively detects ClO2 and free chlorine in the high-concentration ClO2 and free chlorine mixture in the chlorine dioxide dosing pipe 24, forming an online monitoring system for evaluating the operating efficiency of the chlorine dioxide generator.

[0042] The system operation process of this utility model is as follows: Upon startup, the reagent is first added to the reference cell 9 and detection cell 8 of the chlorine dioxide detection unit 4 and the free chlorine detection unit 5 respectively via the corresponding linear peristaltic pump 6. Then, under the action of the corresponding linear peristaltic pump 6, the monitor of this utility model draws the mixture from the chlorine dioxide dosing tube 24 and introduces it into the two sample dilution cells 7 through the sample inlet tube 15 below the monitor. Based on the user-preset dilution factor (1-100 times) in the data processing unit, the monitor automatically draws the corresponding amount of pure water to rapidly dilute the mixed sample. The diluted sample is then quickly injected into the two sample detection cells 8 via the corresponding linear peristaltic pump. Simultaneously, an equal volume of pure water is drawn and injected into the reference cell 9. Under stirring, the sample undergoes a colorimetric reaction with the DPD. After a period of time (e.g., about 2 minutes), the dual-beam spectrophotometer 10 records the absorbance difference between the detection cell 8 and the reference cell 9. After the test is completed, the samples in test pool 8 and reference pool 9 are discharged through the water outlet. The test unit automatically draws in pure water to clean the sample dilution pool, test pool, reference pool and all pipelines in preparation for the next round of testing.

[0043] The data processing unit calculates the measured values ​​of ClO2 and free chlorine concentrations based on the absorbance difference between the chlorine dioxide detection unit and the free chlorine detection unit, according to the Lambert-Beer Law. Since the presence of ClO2 positively interferes with the colorimetric quantification of free chlorine, leading to inaccurate measurements of free chlorine concentration, this patent corrects the measured value of free chlorine concentration by constructing a response surface model based on a quadratic polynomial. The response surface model includes four variables: the measured value of ClO2 concentration, the measured value of free chlorine concentration, temperature, and dilution factor, as well as a response, namely the revised value of free chlorine concentration. The data analysis unit further calculates the yield of ClO2 and free chlorine in the chlorine dioxide generator, the mass fraction of ClO2 in the total available chlorine, and the ClO2 conversion rate based on the accurate concentrations of free chlorine and ClO2 in the chlorine dioxide dosing tube and the flow rate of the dosing tube. The data processing unit can also calculate the proportion of the main reaction based on the accurate concentrations of free chlorine and ClO2 in the chlorine dioxide dosing tube.

[0044] This invention utilizes its automatic dilution technology, enabling the system to directly process high-concentration samples collected on-site without additional pretreatment steps, significantly improving the practicality and convenience of the monitoring system. This patented invention employs dual-channel detection to determine the individual concentrations of ClO2 and free chlorine in a high-concentration ClO2 and free chlorine mixture, and then uses a quadratic polynomial equation derived from hypersurface fitting to correct the measured concentration of free chlorine, thereby obtaining the corrected concentration of free chlorine.

[0045] The above provides a detailed description of an online monitoring instrument for evaluating the operational efficiency of a chlorine dioxide generator, as provided in the embodiments of this utility model. The above embodiments are merely illustrative of the technical solutions of this utility model and not intended to limit the scope of the technical solutions. Although the applicant has provided a detailed description of this utility model with reference to preferred embodiments, those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of this utility model that do not depart from the spirit and scope of the technical solutions should be covered within the scope of the claims of this utility model.

Claims

1. An online monitor for evaluating the operating efficiency of a chlorine dioxide generator, comprising a body (1), characterized in that, The water sample detection module (2) and the data analysis module (3) are arranged in the body (1); the water sample detection module (2) comprises a chlorine dioxide detection unit (4) and a free chlorine detection unit (5), and the chlorine dioxide detection unit (4) and the free chlorine detection unit (5) are both provided with a plurality of linear peristaltic pumps (6); The chlorine dioxide detection unit (4) and the free chlorine detection unit (5) are both respectively provided with a dilution tank (7), a detection tank (8), a reference tank (9) and a spectrophotometer (10); The water sample detection module (2) is provided with a buffer solution bottle (11), a DPD solution bottle (12) and a glycine solution bottle (13) for containing buffer solution, DPD solution and glycine solution respectively, each solution bottle is connected with a corresponding linear peristaltic pump (6) through a hose (14), and the required amount is sucked through the suction of the linear peristaltic pump (6) and then is delivered into the detection tank (8) or the reference tank (9) through the hose (14); The dilution tank (7) is connected with a linear peristaltic pump (6) through a sample inlet pipe (15), and the required dose is sucked by the linear peristaltic pump (6) through the sample inlet pipe (15) and is delivered into the dilution tank (7) through the sample inlet pipe (15).

2. The online monitor for evaluating the operational efficiency of a chlorine dioxide generator according to claim 1, wherein The data analysis module (3) mainly comprises a display screen, a data processing unit, a data transmission unit, a monitoring system and an alarm system; the data processing unit is electrically connected with the spectrophotometer (10) of the water sample detection module (2) to collect the detection data obtained by the spectrophotometer (10) of the detection unit; the display screen, the data transmission unit, the monitoring system and the alarm system are electrically connected with the data processing unit respectively.

3. The online monitor for evaluating the operational efficiency of a chlorine dioxide generator according to claim 1, wherein The water sample detection module (2) is located at the lower part of the body (1), and the data analysis module (3) is located at the upper part of the body (1).

4. The online monitor for evaluating the operational efficiency of a chlorine dioxide generator according to claim 3, wherein The spectrophotometer (10) is a double-beam spectrophotometer.

5. The on-line monitor for evaluating the operational efficiency of a chlorine dioxide generator according to any one of claims 1 to 4, wherein The water sample detection module (2) is provided with the buffer solution bottle (11), the DPD solution bottle (12) and the glycine solution bottle (13).

6. An online monitoring system for evaluating the operational efficiency of a chlorine dioxide generator, characterized in that, The online monitoring instrument for evaluating the operation efficiency of the chlorine dioxide generator, the chlorine dioxide generator (20) and the contact disinfection tank (25) are connected through the chlorine dioxide feeding pipe (22) and the water injector (23), the pipe behind the water injector (23) is the chlorine dioxide feeding pipe (24), the online monitoring instrument for evaluating the operation efficiency of the chlorine dioxide generator is connected with the chlorine dioxide feeding pipe (24) through the sample inlet pipe (15), the sample inlet pipe (15) is connected with a linear peristaltic pump (6), and the required dose is sucked from the chlorine dioxide feeding pipe (24) and is delivered into the dilution tank (7); the chlorine dioxide feeding pipe (24) is connected into the contact disinfection tank (25).

7. The online monitoring system for evaluating the operational effectiveness of a chlorine dioxide generator according to claim 6, wherein, The chlorine dioxide generator (20) is provided with a raw material container (21) mainly comprising a hydrochloric acid container and a hypochlorous acid container.

8. The online monitoring system for evaluating the operational effectiveness of a chlorine dioxide generator according to claim 6 or 7, wherein The online monitoring instrument for evaluating the operation efficiency of the chlorine dioxide generator is arranged at a position 1.5m-3m downstream from the outlet of the water injector (23).

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