Industrial circulating water multi-parameter online detection system

Abstract

The utility model provides an industrial circulating water multi-parameter on-line detection system, which comprises a sampling unit, an electrode detection device, a metering unit and a reaction and identification unit, the sampling unit comprises a sampling pipeline for transmitting a water sample, a plurality of prepad fluid tanks, a pure water tank and a plurality of titration liquid tanks, the metering unit comprises a multi-channel selection valve, a rotary metering pump and a multi-channel metering injection pump, the input end of the rotary metering pump is connected with each prepad fluid tank, the sampling pipeline and the pure water tank through the multi-channel selection valve, and the output end of the rotary metering pump is connected with the reaction and recognition unit; the input end of the multi-channel metering injection pump is connected with the titrating solution tank, the output end of the multi-channel metering injection pump is connected with the reaction and identification unit, the sampling pipeline is provided with an electromagnetic valve for closing / opening the sampling pipeline, and the detection end of the electrode detection device is positioned in the sampling pipeline. According to the utility model, the automation degree and the integration degree of industrial circulating water detection are improved, and the detection efficiency and the accuracy are improved.

Description

Technical Field

[0001] This utility model relates to the field of water quality instrument analysis and detection technology, specifically to an online detection system for multiple parameters of industrial circulating water. Background Technology

[0002] Industrial circulating water refers to a water usage method in industrial production processes where wastewater is treated and reused. This method effectively saves water resources, reduces wastewater discharge, and aligns with sustainable development requirements. However, with increasing circulation cycles, pollutants accumulate in the water. Without effective monitoring and treatment, this can cause corrosion and scaling on production equipment, seriously threatening production safety and product quality. Therefore, industrial circulating water quality testing is an indispensable step in ensuring production safety and water quality stability. Circulating water testing indicators include chloride ions, pH, conductivity, turbidity, total hardness, alkalinity, and calcium ions. Currently, most laboratories or chemical plants use manual sampling and individual electrodes for circulating water testing.

[0003] The existing technology has several drawbacks: First, it relies on manual testing, which is susceptible to human error. For example, the orange-red endpoint in alkalinity testing is difficult to interpret, and different lab technicians may produce different results for the same sample, leading to significant testing errors. Second, commercially available single-parameter analyzers offer only one parameter, requiring four or five instruments for circulating water testing, increasing operational complexity. Third, single-parameter instrument testing necessitates sample processing for each test, requiring manual rinsing of reaction flasks, resulting in low testing efficiency. Utility Model Content

[0004] To address the problems in the background technology and improve the accuracy, efficiency, and stability of circulating water detection, this utility model proposes an online multi-parameter detection system for industrial circulating water, including a sampling unit, an electrode detection device, a metering unit, and a reaction and identification unit. The sampling unit includes a sampling pipeline for transmitting water samples, multiple pre-flushing tanks, a pure water tank, and multiple titration tanks. The metering unit includes a multi-channel selection valve, a rotary metering pump, and a multi-channel metering injection pump. The input end of the rotary metering pump is connected to each of the pre-flushing tanks, the sampling pipeline, and the pure water tank through the multi-channel selection valve, and the output end of the rotary metering pump is connected to the reaction and identification unit. The input end of the multi-channel metering injection pump is connected to the titration tank, and the output end of the multi-channel metering injection pump is connected to the reaction and identification unit. The sampling pipeline is equipped with a solenoid valve for closing / opening the sampling pipeline, and the detection end of the electrode detection device is located inside the sampling pipeline.

[0005] Preferably, the sampling pipeline includes a main pipeline and multiple branch pipeline units. Each branch pipeline unit includes a first branch pipeline and a second branch pipeline. The main pipeline is connected to a multi-channel selector valve. One end of the first branch pipeline is connected to the main pipeline, and one end of the second branch pipeline is connected to the first branch pipeline. The other ends of both the first and second branch pipelines are connected to water samples. The solenoid valve includes a first solenoid valve and a second solenoid valve. The first solenoid valve is disposed on the first branch pipeline and is located between the second branch pipeline and the main pipeline. The second solenoid valve is disposed on the second branch pipeline.

[0006] Preferably, the reaction and recognition unit includes a reaction vessel, a diaphragm pump, a light source, and a photodetector. The light source and the photodetector are located on opposite sides of the reaction vessel, and their positions are opposite to each other. The output end of the diaphragm pump is connected to the reaction vessel.

[0007] The outputs of the rotary metering pump and the multi-channel metering injection pump are respectively connected to the inlet of the reaction vessel.

[0008] Preferably, the outlet of the reaction vessel is connected to a waste container via a waste discharge pump.

[0009] Preferably, the reaction vessel is fixed in a mounting frame, and the light source and photodetector are fixed on the mounting frame.

[0010] Preferably, the electrode detection device includes a pH electrode, a conductivity electrode, a chloride ion electrode, and a turbidity electrode.

[0011] Preferably, it also includes a control unit and a human-machine interaction unit, wherein the control unit is connected to a multi-channel selector valve, a rotary metering pump, a solenoid valve, an electrode detection device, a multi-channel metering injection pump, a reaction and recognition unit, and the human-machine interaction unit, respectively.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. This invention integrates electrode detection and chemical analysis to achieve multi-parameter detection of circulating water. The electrode detection device has its detection end installed inside the sampling pipeline. By detecting the circulating water sample flowing through the sampling pipeline, it measures the pH, conductivity, turbidity, and chloride ion parameters of the circulating water. Chemical analysis is achieved through the combined use of a high-precision rotary metering pump, a multi-channel selector valve, a high-precision multi-channel metering syringe pump, and a reaction and identification unit, enabling automatic analysis of the water sample and measurement of the circulating water's hardness, alkalinity, and calcium ion parameters. This invention integrates multi-parameter detection, reducing the complexity of detection, increasing the degree of automation, significantly reducing manual intervention, and improving detection efficiency and accuracy.

[0014] 2. The sampling pipeline of this utility model includes multiple branch pipeline units. Each branch pipeline unit is controlled by two solenoid valves to close / open. When not in use, the first solenoid valve on the first branch pipeline is closed, and the second solenoid valve on the second branch pipeline is open. The water sample cannot enter the main pipeline through the first branch pipeline, but instead circulates directly into the production device containing the water sample through the second solenoid valve and the second branch pipeline. This ensures the circulation of the water sample within the first and second branch pipelines when not in use, preventing the water sample from stagnating within the branch pipeline unit. During use, the second solenoid valve is closed, and the first solenoid valve is open. The water sample can then flow into the main pipeline through the first solenoid valve and the first branch pipeline, and is drawn into the reaction vessel by a rotary metering pump. The sampling pipeline of this utility model can achieve the circulation of the water sample, ensuring that the water sample is not contaminated, thereby ensuring the accuracy of water sample testing. At the same time, the multiple branch pipeline units enable multi-point testing of the water sample. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] The following are labeled in the diagram: 1. Pre-fill tank; 2. Multi-channel selector valve; 3. Rotary metering pump; 4. Main pipeline; 5. First branch pipeline; 6. Second branch pipeline; 7. First solenoid valve; 8. Second solenoid valve; 9. Reaction vessel; 10. Light source; 11. Photodetector; 12. Ball valve; 13. Diaphragm pump; 14. Waste pump; 15. Waste container; 16. Multi-channel metering syringe pump; 17. Pure water tank; 18. Titration tank; 19. Fixture; 20. pH electrode; 21. Conductivity electrode; 22. Chloride ion electrode; 23. Turbidity electrode. Detailed Implementation

[0017] To make this utility model clearer and more understandable, the technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the given embodiments are only one of the implementation methods and do not represent all embodiments.

[0018] In this article, terms such as "inner" and "outer" are established based on the positional relationships shown in the attached drawings. Depending on the attached drawings, the corresponding positional relationships may also change. Therefore, they should not be interpreted as an absolute limitation on the scope of protection.

[0019] Combined with appendix Figure 1An online multi-parameter detection system for industrial circulating water includes a sampling unit, an electrode detection device, a metering unit, and a reaction and identification unit. The sampling unit includes a sampling pipeline for transmitting water samples, multiple pre-liquid tanks 1, a pure water tank 17, and multiple titration tanks 18. The metering unit includes a multi-channel selection valve 2, a rotary metering pump 3, and a multi-channel metering injection pump 16. The input end of the rotary metering pump 3 is connected to each of the pre-liquid tanks 1, the sampling pipeline, and the pure water tank 17 via the multi-channel selection valve 2. The output end of the rotary metering pump 3 is connected to the reaction and identification unit. The input end of the multi-channel metering injection pump 16 is connected to the titration tank 18, and the output end of the multi-channel metering injection pump 16 is connected to the reaction and identification unit. The sampling pipeline is equipped with a solenoid valve for closing / opening the sampling pipeline. The detection end of the electrode detection device is located inside the sampling pipeline.

[0020] The pure water tank 17 contains pure water, the pre-flushing tank 1 contains pre-flushing solution for industrial circulating water testing, and the titration tank 18 contains titration solution for industrial circulating water testing. The number of pre-flushing tanks 1 corresponds to the required type of pre-flushing solution, and the number of titration tanks 18 corresponds to the required type of titration solution. That is, one pre-flushing tank 1 contains one type of pre-flushing solution, and one titration tank 18 contains one type of titration solution. The types of pre-flushing solution and titration solution are determined according to the national standard testing method for industrial circulating water.

[0021] Specifically, a rotary metering pump 3 with a metering accuracy of 0.01 ml and a multi-channel metering syringe pump 16 are used. The rotary metering pump 3 can accurately measure the amount of pre-fluid added, and the multi-channel metering syringe pump 16 can accurately measure the amount of titrant to be dispensed, and can select the required titrant to be pumped according to the closure of its channels.

[0022] Specifically, the sampling pipeline includes a main pipeline 4 and multiple branch pipeline units. Each branch pipeline unit includes a first branch pipeline 5 and a second branch pipeline 6. The main pipeline 4 is connected to a multi-channel selector valve 2. One end of the first branch pipeline 5 is connected to the main pipeline 4, and one end of the second branch pipeline 6 is connected to the first branch pipeline 5. The other ends of both the first branch pipeline 5 and the second branch pipeline 6 are connected to water samples. The solenoid valve includes a first solenoid valve 7 and a second solenoid valve 8. The first solenoid valve 7 is located on the first branch pipeline 5 and between the second branch pipeline 6 and the main pipeline 4. The second solenoid valve 8 is located on the second branch pipeline 6. When not in use, the first solenoid valve 7 on the first branch pipe 5 is closed, and the second solenoid valve 8 on the second branch pipe 6 is open. Water samples cannot enter the main pipe 4 through the first branch pipe 5; instead, they circulate directly into the production unit containing the water sample through the second solenoid valve 8 and the second branch pipe 6. This ensures the water sample circulates within the first and second branch pipes 5 and 6 when not in use, preventing stagnation within the branch pipe units. During testing, the second solenoid valve 8 is closed, and the first solenoid valve 7 is open. The water sample then flows through the first solenoid valve 7 and the first branch pipe 5 into the main pipe 4, where it is drawn into the reaction vessel 9 by the rotary metering pump 3. Before testing, the solenoid valves can be opened, allowing the water sample to flow through the first branch pipe 5 to the main pipe 4, and then back through the second branch pipe 6. This allows the water sample to circulate within the sampling pipeline for a period of time, ensuring the water sample remains uncontaminated and thus guaranteeing the accuracy of the water sample testing.

[0023] More specifically, multiple branch pipeline units are arranged at intervals along the length of the main pipeline 4. One end of the main pipeline 4 is connected to the multi-channel selector valve 2, and the other end of the main pipeline 4 is connected to the end of a first branch pipeline 5 away from the water sample.

[0024] More specifically, ball valves 12 are installed on the pipes of the first branch pipe 5 and the second branch pipe 6 near the water sample end.

[0025] Specifically, the reaction and identification unit includes a reaction dish 9, a diaphragm pump 13, a light source 10, and a photodetector 11. The light source 10 and the photodetector 11 are located on opposite sides of the reaction dish 9. The output of the diaphragm pump 13 is connected to the reaction dish 9. The outputs of the rotary metering pump 3 and the multi-channel metering injection pump 16 are connected to the inlet of the reaction dish 9. The outlet of the reaction dish 9 is connected to a waste container 15 via a waste discharge pump 14. The light source 10 and the photodetector 11 work together to detect the correlation between absorbance and liquid concentration in the reaction dish 9, as well as the light energy value. This allows for the analysis and detection of industrial circulating water quality in conjunction with the addition of pretreatment and titration solutions. The waste discharge pump 14 is used to discharge the liquid from the reaction dish 9, such as the industrial circulating water after testing. The waste container 15 is used to hold the liquid discharged from the reaction dish 9. The diaphragm pump 13 is used to draw in air at its input end and is connected to the reaction vessel 9 at its output end. Air is introduced into the reaction vessel 9 through the diaphragm pump 13 to agitate the liquid inside the reaction vessel 9.

[0026] Specifically, the reaction dish 9 is fixed in the mounting bracket 19, and the light source 10 and photodetector 11 are fixed on the mounting bracket 19. The mounting bracket 19 provides an installation position for the reaction dish 9, the light source 10 and the photodetector 11.

[0027] Specifically, the electrode detection device includes a pH electrode 20, a conductivity electrode 21, a chloride ion electrode 22, and a turbidity electrode 23. More specifically, the pH electrode 20, conductivity electrode 21, chloride ion electrode 22, and turbidity electrode 23 are arranged at intervals along the length of the main pipeline 4.

[0028] Specifically, it also includes a control unit and a human-machine interface unit. The control unit is connected to the multi-channel selection valve 2, the rotary metering pump 3, the solenoid valve, the electrode detection device, the multi-channel metering injection pump 16, the reaction and identification unit, and the human-machine interface unit. More specifically, the control unit is connected to the multi-channel selection valve 2, the rotary metering pump 3, the first solenoid valve 7, the second solenoid valve 8, the multi-channel metering injection pump 16, the light source 10, the photodetector 11, the pH detection device, the conductivity detection device, the chloride ion detection device, the turbidity detection device, the waste discharge pump 14, and the human-machine interface unit. The control unit controls the operation of each device. By pre-setting working programs in the control unit, it realizes the control of the overall detection process and transmits the detection signals to the human-machine interface unit. The human-machine interface unit is used to issue control commands and display the reaction status, reaction process, and historical data. The human-machine interface unit can be a resistive touch screen.

[0029] Testing Procedure: Before testing, the water sample circulates continuously within the distribution pipeline unit. During testing, the first solenoid valve 7 is opened and the second solenoid valve 8 is closed. The high-precision rotary metering pump 3 pumps the water sample into the reaction vessel 9. The electrode detection device detects the water sample flowing through the main pipeline 4. The water sample entering the reaction vessel 9 is rinsed repeatedly. After rinsing, pretreatment solution is added sequentially according to the national standard testing method. The order and amount of pretreatment solution added are controlled by the rotary metering pump 3 and the multi-channel selection valve 2. Then, air stirring is performed by the diaphragm pump 13, and the required titrant is pumped into the reaction vessel 9 sequentially by the high-precision multi-channel metering injection pump 16 for titration. The reaction endpoint is determined by the light source 10 and the photodetector 11, thus achieving chemical detection of the water sample.

[0030] After the test is completed, the liquid in the reaction vessel 9 is discharged using the waste discharge pump 14, and pure water is pumped into the reaction vessel 9 using the rotary metering pump 3 to clean the reaction vessel 9. The cleaned pure water is then discharged to the waste container 15 by the waste discharge pump 14.

[0031] Although embodiments of the present invention have been shown and described, those skilled in the art will be able to make various changes, modifications, substitutions and alterations to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An industrial circulating water multi-parameter on-line detection system, characterized in that: The device includes a sampling unit, an electrode detection device, a metering unit, and a reaction and identification unit. The sampling unit includes a sampling pipeline for transmitting water samples, multiple pre-liquid tanks (1), a pure water tank (17), and multiple titration tanks (18). The metering unit includes a multi-channel selection valve (2), a rotary metering pump (3), and a multi-channel metering injection pump (16). The input end of the rotary metering pump (3) is connected to each of the pre-liquid tanks (1), the sampling pipeline, and the pure water tank (17) through the multi-channel selection valve (2). The output end of the rotary metering pump (3) is connected to the reaction and identification unit. The input end of the multi-channel metering injection pump (16) is connected to the titration tank (18), and the output end of the multi-channel metering injection pump (16) is connected to the reaction and identification unit. The sampling pipeline is equipped with a solenoid valve for closing / opening the sampling pipeline. The detection end of the electrode detection device is located inside the sampling pipeline.

2. The online multi-parameter detection system for industrial circulating water according to claim 1, characterized in that: The sampling pipeline includes a main pipeline (4) and multiple branch pipeline units. Each branch pipeline unit includes a first branch pipeline (5) and a second branch pipeline (6). The main pipeline (4) is connected to a multi-channel selector valve (2). One end of the first branch pipeline (5) is connected to the main pipeline (4), and one end of the second branch pipeline (6) is connected to the first branch pipeline (5). The other end of the first branch pipeline (5) and the other end of the second branch pipeline (6) are both connected to water samples. The solenoid valve includes a first solenoid valve (7) and a second solenoid valve (8). The first solenoid valve (7) is located on the first branch pipeline (5) and between the second branch pipeline (6) and the main pipeline (4). The second solenoid valve (8) is located on the second branch pipeline (6).

3. The industrial circulating water multi-parameter on-line detection system according to claim 1, characterized in that: The reaction and recognition unit includes a reaction vessel (9), a diaphragm pump (13), a light source (10), and a photodetector (11). The light source (10) and the photodetector (11) are located on both sides of the reaction vessel (9) and are positioned opposite each other. The output end of the diaphragm pump (13) is connected to the reaction vessel (9). The output ends of the rotary metering pump (3) and the multi-channel metering injection pump (16) are respectively connected to the inlet of the reaction vessel (9).

4. The industrial circulating water multi-parameter on-line detection system according to claim 3, characterized in that: The outlet of the reaction vessel (9) is connected to a waste container (15) via a waste discharge pump (14).

5. The industrial circulating water multi-parameter on-line detection system according to claim 3, characterized in that: The reaction vessel (9) is fixed in the fixture (19), and the light source (10) and photodetector (11) are fixed on the fixture (19).

6. The industrial circulating water multi-parameter on-line detection system according to claim 1, characterized in that: The electrode detection device includes a pH electrode (20), a conductivity electrode (21), a chloride ion electrode (22), and a turbidity electrode (23).

7. The industrial circulating water multi-parameter on-line detection system according to claim 1, characterized in that: It also includes a control unit and a human-machine interaction unit. The control unit is connected to a multi-channel selection valve (2), a rotary metering pump (3), a solenoid valve, an electrode detection device, a multi-channel metering injection pump (16), a reaction and recognition unit, and a human-machine interaction unit, respectively.

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