Water quality on-line monitoring and analyzing device

Abstract

The invention discloses a water quality on-line monitoring and analyzing device, and relates to the technical field of industry. The device comprises a water quality sample processing unit, a high pressure measuring unit, a low pressure measuring unit and a control unit, the high pressure measuring unit is respectively connected with the water quality sample processing unit and the control unit, and the low pressure measuring unit is respectively connected with the water quality sample processing unit and the control unit; the water quality sample treatment unit is used for safely treating an original water quality sample to obtain a water quality sample to be detected; the high-pressure measuring unit and the low-pressure measuring unit are respectively used for measuring the water quality sample to obtain a first measuring result output by the high-pressure measuring unit and a second measuring result output by the low-pressure measuring unit; and the control unit is used for performing water quality analysis according to the first measurement result and the second measurement result to obtain a water quality analysis result of the water quality sample. The accuracy of a water quality analysis result can be ensured.

Description

Technical Field

[0001] The present application relates to the field of industrial technology, and in particular to an online water quality monitoring and analysis device. Background Art

[0002] The study of nuclear reactor water chemistry is an important part of reactor technology. The quality of water chemistry conditions is not only related to fuel burnup and the irradiation level inside and outside the reactor, but also has a crucial impact on the integrity of the fuel cladding and the primary pressure boundary, the operating reliability of key equipment, and the safety of the reactor system. Good water chemistry conditions are the main prerequisite for the safe operation of nuclear reactors. Therefore, strict control of water chemistry operating indicators is required.

[0003] The premise of water chemistry control is timely and reliable monitoring and analysis of water quality, and water quality monitoring is an indispensable technical means to obtain the water chemistry status of the primary and secondary circuit coolants. Therefore, it is required to be equipped with corresponding water chemistry monitoring technology, and support operators to quickly make fault diagnosis and take corresponding measures under normal operation, abnormal and emergency conditions to ensure the long-term safe and stable operation of nuclear reactors.

[0004] At present, in the water chemical sampling system of nuclear power plants, manual sampling and laboratory measurement are usually adopted. However, this method is highly dependent on the professionalism, energy, physical strength and experience of the test personnel. For inexperienced test personnel, it is difficult to ensure the accuracy of water quality analysis results, and this method cannot meet the real-time requirements of sample analysis. Summary of the invention

[0005] In view of this, the present application provides an online water quality monitoring and analysis device, the main purpose of which is to be able to monitor and analyze water quality in real time while ensuring the accuracy of water quality analysis results.

[0006] According to a first aspect of the present application, there is provided a water quality online monitoring and analysis device, characterized in that it comprises: a water quality sample processing unit, a high pressure measuring unit, a low pressure measuring unit and a control unit, wherein the high pressure measuring unit is connected to the water quality sample processing unit and the control unit respectively, and the low pressure measuring unit is connected to the water quality sample processing unit and the control unit respectively;

[0007] The water quality sample processing unit is used to safely process the original water quality sample to obtain the water quality sample to be tested;

[0008] The high-pressure measuring unit and the low-pressure measuring unit are respectively used to measure the water quality sample to obtain a first measurement result output by the high-pressure measuring unit and a second measurement result output by the low-pressure measuring unit;

[0009] The control unit is used to perform water quality analysis according to the first measurement result and the second measurement result to obtain a water quality analysis result of the water sample.

[0010] Optionally, the water quality sample processing unit comprises: a filter and a cooler, one end of the cooler is connected to the filter, and the other end of the cooler is connected to the high pressure measuring unit and the low pressure measuring unit respectively;

[0011] The water quality sample flows into the high-pressure measuring unit and the low-pressure measuring unit after being safely processed by the filter and the cooler respectively.

[0012] Optionally, the water quality sample processing unit further includes: a first temperature measuring device, a second temperature measuring device, a first pressure measuring device, a first stop valve, a second stop valve and a third stop valve, wherein the first stop valve is connected to the inlet end of the filter, the outlet end of the filter is connected to the inlet end of the cooler, the outlet end of the cooler is connected to the high pressure measuring unit through the second stop valve, and is connected to the low pressure measuring unit through the third stop valve, the second stop valve is connected in parallel with the third stop valve, and the first temperature measuring device, the second temperature measuring device and the first pressure measuring device are respectively connected to the control unit;

[0013] The first temperature measuring device and the first pressure measuring device are used to measure the first temperature and the first pressure of the water sample in the pipeline between the first stop valve and the filter, respectively, and feed the first temperature and the first pressure back to the control unit;

[0014] The control unit is used to control the opening and closing of the first stop valve according to the first temperature and the first pressure;

[0015] The second temperature measuring device is used to measure the second temperature of the water sample in the pipeline between the cooler and the second stop valve and the third stop valve, and feed the second temperature back to the control unit;

[0016] The control unit is further used to adjust the opening of the cooler valve according to the second temperature, and to control the opening and closing of the second stop valve and the third stop valve.

[0017] Optionally, the water quality sample processing unit further comprises: a pressure reducing mechanism, a second pressure measuring device and a pressure releasing mechanism, wherein the pressure releasing mechanism is connected in series with the pressure reducing mechanism and then connected to the third stop valve, and the second pressure measuring device is connected to the control unit;

[0018] The second pressure measuring device is used to measure the second pressure of the water quality sample at the outlet end of the pressure reducing mechanism and feed the second pressure back to the control unit;

[0019] The control unit is further used to adjust the opening of the pressure reducing mechanism according to the second pressure, and to control the opening and closing of the third stop valve.

[0020] Optionally, the high-voltage measuring unit includes: a dissolved oxygen content measuring device, a dissolved hydrogen content measuring device, a conductivity measuring device and a boron concentration analyzing device, wherein the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device are sequentially connected in series and then connected to the water quality sample processing unit, the boron concentration analyzing device is connected to the water quality sample processing unit and is connected in parallel with the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device, and the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device, the conductivity measuring device and the boron concentration analyzing device are respectively connected to the control unit;

[0021] The dissolved oxygen content measuring device, the dissolved hydrogen content measuring device, the conductivity measuring device and the boron concentration analyzing device are used to measure the oxygen content, hydrogen content, conductivity and boron concentration of the water quality sample, respectively, and send the oxygen content, hydrogen content, conductivity and boron concentration as the first measurement result to the control unit;

[0022] The control unit is used to perform water quality analysis based on the oxygen content, the hydrogen content, the conductivity and the boron concentration, and the second measurement result output by the low-pressure measurement unit to obtain the water quality analysis result of the water quality sample.

[0023] Optionally, the high-pressure measuring unit further includes: a first flow measuring device, a second flow measuring device, a first needle valve, a second needle valve, a fourth stop valve and a fifth stop valve; the first needle valve is connected to the inlet end of the dissolved oxygen content measuring device, the second needle valve is connected to the inlet end of the boron concentration analysis device, the fourth stop valve is connected to the outlet end of the conductivity measuring device, the fifth stop valve is connected to the outlet end of the boron concentration analysis device, and the first flow measuring device and the second flow measuring device are respectively connected to the control unit;

[0024] The first flow measurement device is used to measure a first flow of the water quality sample at the inlet end of the first needle valve, and feed the first flow back to the control unit;

[0025] The second flow measurement device is used to measure a second flow of the water quality sample at the inlet end of the second needle valve, and feed the second flow back to the control unit;

[0026] The control unit is also used to adjust the opening of the first needle valve according to the first flow rate to control the water quality sample flow rate of the branch where the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device are located, and at the same time adjust the opening of the second needle valve according to the second flow rate to control the water quality sample flow rate of the branch where the boron concentration analysis device is located.

[0027] Optionally, the high-pressure measuring unit further includes: three-way valves respectively located at the inlet ends of the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device.

[0028] Optionally, the low-voltage measurement unit includes: a pH value measuring device and an ion concentration monitoring device, the pH value measuring device and the ion concentration monitoring device are respectively connected to the water quality sample processing unit, the pH value measuring device and the ion concentration monitoring device are connected in parallel, and the pH value measuring device and the ion concentration monitoring device are respectively connected to the control unit;

[0029] The pH value measuring device and the ion concentration monitoring device are used to measure the pH value and ion concentration of the water quality sample, respectively, and feed back the pH value and the ion concentration as the second measurement result to the control unit;

[0030] The control unit is used to perform water quality analysis based on the first measurement result output by the high-voltage measurement unit, as well as the pH value and the ion concentration, to obtain a water quality analysis result of the water sample.

[0031] Optionally, the low-pressure measuring unit also includes: a collecting tank, a purification device, a booster pump and a filter. The collecting tank, the purification device and the booster pump are connected in series in sequence and connected to the outlet end of the pH value measuring device. The inlet end of the ion concentration monitoring device is connected to the outlet end of the filter.

[0032] Optionally, the low-pressure measuring device further includes: a third flow measuring device, a fourth flow measuring device, a third needle valve, a fourth needle valve, a sixth stop valve, a seventh stop valve, a check valve and a third pressure measuring device, the third needle valve is connected to the inlet end of the pH value measuring device, the fourth needle valve is connected to the inlet end of the filter, both ends of the check valve are respectively connected to the outlet end of the boost pump and the sixth stop valve, the seventh stop valve is connected to the outlet end of the ion concentration monitoring device, and the third flow measuring device, the fourth flow measuring device and the third pressure measuring device are respectively connected to the control unit;

[0033] The third flow measurement device is used to measure the third flow of the water quality sample at the inlet end of the third needle valve, and feed back the third flow to the control unit;

[0034] The fourth flow measurement device is used to measure a fourth flow of the water quality sample at the inlet end of the fourth needle valve, and feed the fourth flow back to the control unit;

[0035] The control unit is further used to adjust the opening of the third needle valve according to the third flow rate to control the water quality sample flow rate of the branch where the pH value measuring device is located, and at the same time adjust the opening of the fourth needle valve according to the fourth flow rate to control the water quality sample flow rate of the branch where the ion concentration monitoring device is located;

[0036] The third pressure measuring device is used to measure the third pressure at the outlet of the boost pump and feed back the third pressure to the control unit;

[0037] The control unit is further used to adjust the parameters of the boost pump according to the third pressure.

[0038] Optionally, the control unit is specifically used to calculate the deviation value, the dosage and the water injection dilution amount according to the first measurement result and the second measurement result, and adjust the water quality according to the deviation value, the dosage and the water injection dilution amount.

[0039] By means of the above technical scheme, the online water quality monitoring and analysis device provided by the present application can monitor and analyze water quality in real time, and can ensure the accuracy of water quality analysis results, compared with the prior art. In addition, the present application can also prevent test personnel from suffering from radioactive hazards when taking samples on site.

[0040] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0042] Figure 1 A schematic diagram of the structure of an online water quality monitoring and analysis device provided in an embodiment of the present application is shown;

[0043] Figure 2 A schematic diagram of the structure of another water quality online monitoring and analysis device provided in an embodiment of the present application is shown;

[0044] Figure 3 A schematic diagram of the appearance and structure of the water quality online monitoring and analysis device provided in an embodiment of the present application is shown. DETAILED DESCRIPTION

[0045] The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0046] The existing method is highly dependent on the professional level, energy, physical strength and experience of the test personnel. For inexperienced test personnel, it is difficult to ensure the accuracy of water quality analysis results, and it cannot meet the real-time requirements of sample analysis.

[0047] In order to solve the above problems, the present invention provides an online water quality monitoring and analysis device. Figure 1 As shown, it includes: a water quality sample processing unit 1, a high-pressure measuring unit 2, a low-pressure measuring unit 3 and a control unit 4, the high-pressure measuring unit 2 is respectively connected to the water quality sample processing unit 1 and the control unit 4, and the low-pressure measuring unit 3 is respectively connected to the water quality sample processing unit 1 and the control unit 4; the water quality sample processing unit 1 is used to safely process the original water quality sample to obtain the water quality sample to be tested; the high-pressure measuring unit 2 and the low-pressure measuring unit 3 are respectively used to measure the water quality sample to obtain a first measurement result output by the high-pressure measuring unit and a second measurement result output by the low-pressure measuring unit; the control unit 4 is used to perform water quality analysis according to the first measurement result and the second measurement result to obtain the water quality analysis result of the water quality sample.

[0048] The first measurement result includes the oxygen content, hydrogen content, conductivity and boron concentration of the water quality sample; the second measurement result includes the pH value and ion concentration of the water quality sample. The water quality sample processing unit 1 is connected to the high-pressure measuring unit 2 and the low-pressure measuring unit 3 through pipelines, and the high-pressure measuring unit 2 and the low-pressure measuring unit 3 are connected to the control unit 4 through wires or cables.

[0049] Specifically, the original water quality sample flows into the water quality sample processing unit 1 through the sample inlet. The water quality sample processing unit 1 realizes the use environment of the measuring equipment in the downstream high-pressure measuring unit 2 and the low-pressure measuring unit 3 by filtering, cooling, reducing pressure and other operations on the water quality sample, thereby avoiding damage to the equipment. After being processed by the water quality sample processing unit 1, the water quality sample is divided and enters the high-pressure measuring unit 2 and the low-pressure measuring unit 3 for measurement respectively, and the first measurement result and the second measurement result are obtained, wherein the branch where the high-pressure measuring unit 2 is located is connected in parallel with the branch where the low-pressure measuring unit 3 is located. After that, the high-pressure measuring unit 2 and the low-pressure measuring unit 3 will feed back the obtained first measurement result and the second measurement result to the control unit 4. After receiving the first measurement result and the second measurement result, the control unit 4 performs water quality analysis according to the first measurement result and the second measurement result, thereby providing parameters for the system to adjust the water quality and realizing online automatic analysis of water quality.

[0050] In some embodiments, Figure 2 As shown, the water quality sample processing unit 1 includes: a filter S01 and a cooler S02, one end of the cooler S02 is connected to the filter S01, and the other end of the cooler S02 is respectively connected to the high-pressure measuring unit 2 and the low-pressure measuring unit 3; the water quality sample flows into the high-pressure measuring unit 2 and the low-pressure measuring unit 3 after safety treatment through the filter S01 and the cooler S02.

[0051] Specifically, after the water quality sample is filtered and cooled by the filter S01 and the cooler S02 in turn, it is divided into two branches. The water quality sample of one branch flows into the high-pressure measurement unit 2, and the water quality sample of the other branch flows into the low-pressure measurement unit 3.

[0052] In some embodiments, the water quality sample processing unit 1 also includes: a first temperature measuring device T01, a second temperature measuring device T02, a first pressure measuring device P01, a first stop valve V01, a second stop valve V02 and a third stop valve V10, the first stop valve V01 is connected to the inlet end of the filter S01, the outlet end of the filter S01 is connected to the inlet end of the cooler S02, the outlet end of the cooler S02 is connected to the high pressure measuring unit 2 through the second stop valve V02, and is connected to the low pressure measuring unit 3 through the third stop valve V10, the second stop valve V02 is connected in parallel with the third stop valve V10, the first temperature measuring device T01, the second temperature measuring device T02, and the first pressure measuring device P01 are respectively connected to the control unit 4; the first temperature The first temperature measuring device T01 and the first pressure measuring device P01 are respectively used to measure the first temperature and the first pressure of the water quality sample in the pipeline between the first stop valve V01 and the filter S01, and feed back the first temperature and the first pressure to the control unit 4; the control unit 4 is used to control the opening and closing of the first stop valve V01 according to the first temperature and the first pressure; the second temperature measuring device T02 is used to measure the second temperature of the water quality sample in the pipeline between the cooler S02 and the second stop valve V02 and the third stop valve V10, and feed back the second temperature to the control unit 4; the control unit 4 is also used to adjust the opening of the cooler valve V18 according to the second temperature, and control the opening and closing of the second stop valve V02 and the third stop valve V10.

[0053] In some embodiments, the water quality sample processing unit 1 also includes: a pressure reducing mechanism V11, a second pressure measuring device P02 and a pressure releasing mechanism V12. The pressure releasing mechanism V12 is connected in series with the pressure reducing mechanism V12 and then connected to the third stop valve V10. The second pressure measuring device P02 is connected to the control unit 4. The second pressure measuring device P02 is used to measure the second pressure of the water quality sample at the outlet end of the pressure reducing mechanism V12, and feed back the second pressure to the control unit 4. The control unit 4 is also used to adjust the opening of the pressure reducing mechanism V11 according to the second pressure, and control the opening and closing of the third stop valve V10.

[0054] The pressure reducing mechanism V11 may be a pressure reducing valve, and the pressure releasing mechanism V12 may be a safety valve. The first temperature measuring device T01 and the second temperature measuring device T02 may be temperature sensors, and the first pressure measuring device P01 and the second pressure measuring device P02 may be pressure sensors.

[0055] Specifically, when the first stop valve V01 is open, the original water quality sample (high-pressure water quality sample) passes through the first temperature measuring device T01 and the first pressure measuring device P01 for temperature measurement and pressure measurement, and then enters the filter S01 to filter out large particles of solid impurities in the water quality sample. The filter S01 is a sintered or filter mesh filter with a filter diameter of 100 to 150 μm. Physical filtration is used. After filtration, the water quality sample enters the cooler S01 for cooling. The temperature after cooling is monitored by the second temperature measuring device T02. If the measured second temperature exceeds the preset temperature, the control unit 4 will control the first stop valve V01 to close. At the same time, the control unit 4 will also control the second stop valve V02 and the third stop valve V10 to close to prevent the high-temperature water quality sample from flowing into the downstream measuring device, thereby causing equipment damage.

[0056] The water quality sample is split after passing through the cooler S02. The water quality sample of one branch directly flows into the high-pressure measuring unit 2 after passing through the second stop valve V02, and the water quality sample of the other branch passes through the third stop valve V10 and is decompressed by the pressure reducing mechanism V11. The decompressed water quality sample flows into the low-pressure measuring unit 3. A second pressure measuring device P02 is arranged behind the pressure reducing mechanism V11 to monitor the pressure reducing effect to protect the safety of the measuring equipment in the low-pressure measuring unit 3. For example, when the second pressure measuring device P02 measures that the second pressure is greater than the preset pressure of 1Mpa, the control unit 4 will adjust the opening of the pressure reducing mechanism V11, or control the third stop valve V10 to close. In addition, a pressure release mechanism V12 is arranged in front of the low-pressure measuring unit 3 to play an overpressure protection function to avoid damage to the measuring equipment due to abnormal reasons such as failure of the pressure reducing mechanism V11.

[0057] In some embodiments, the high-voltage measuring unit 2 includes: a dissolved oxygen content measuring device M1, a dissolved hydrogen content measuring device M2, a conductivity measuring device M3 and a boron concentration analysis device M4. The dissolved oxygen content measuring device M1, the dissolved hydrogen content measuring device M2 and the conductivity measuring device M3 are sequentially connected in series and then connected to the water quality sample processing unit 1. The boron concentration analysis device M4 is connected to the water quality sample processing unit 1 and is connected in parallel with the dissolved oxygen content measuring device M1, the dissolved hydrogen content measuring device M2 and the conductivity measuring device M3. The dissolved oxygen content measuring device M1, the dissolved hydrogen content measuring device M2 and the conductivity measuring device M3 are connected in series. 3 and the boron concentration analysis device M4 are respectively connected to the control unit 4; the dissolved oxygen content measuring device M1, the dissolved hydrogen content measuring device M2, the conductivity measuring device M3 and the boron concentration analysis device M4 are respectively used to measure the oxygen content, hydrogen content, conductivity and boron concentration of the water quality sample, and send the oxygen content, the hydrogen content, the conductivity and the boron concentration as the first measurement result to the control unit 4; the control unit 4 is used to perform water quality analysis according to the oxygen content, the hydrogen content, the conductivity and the boron concentration, and the second measurement result output by the low-pressure measurement unit, to obtain the water quality analysis result of the water quality sample.

[0058] In some embodiments, the high-pressure measuring unit 2 further includes: a first flow measuring device F01, a second flow measuring device F02, a first needle valve V03, a second needle valve V08, a fourth stop valve V07 and a fifth stop valve V09; the first needle valve V03 is connected to the inlet end of the dissolved oxygen content measuring device M1, the second needle valve V08 is connected to the inlet end of the boron concentration analysis device M4, the fourth stop valve V07 is connected to the outlet end of the conductivity measuring device M3, the fifth stop valve V09 is connected to the outlet end of the boron concentration analysis device M4, the first flow measuring device F01 and the second flow measuring device F02 are respectively connected to the control unit 4; the first flow measuring device F0 1, used to measure the first flow rate of the water quality sample at the inlet end of the first needle valve V03, and feed the first flow rate back to the control unit 4; the second flow measuring device F02, used to measure the second flow rate of the water quality sample at the inlet end of the second needle valve V08, and feed the second flow rate back to the control unit 4; the control unit 4 is also used to adjust the opening of the first needle valve V03 according to the first flow rate, so as to control the water quality sample flow rate of the branch where the dissolved oxygen content measuring device M1, the dissolved hydrogen content measuring device M2 and the conductivity measuring device M3 are located, and at the same time, adjust the opening of the second needle valve V08 according to the second flow rate, so as to control the water quality sample flow rate of the branch where the boron concentration analysis device M4 is located.

[0059] In some embodiments, the high-pressure measuring unit 2 further includes: three-way valves V04, V05 and V06 respectively located at the inlet ends of the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device.

[0060] The dissolved oxygen content measuring device M1 may be an online dissolved oxygen analyzer, the dissolved hydrogen content measuring device M2 may be an online dissolved hydrogen analyzer, the conductivity measuring device M3 may be an online conductivity meter, and the boron concentration analyzing device M4 may be an online boron concentration analyzer. The first flow measuring device F01 and the second flow measuring device F02 may be mass flow meters or ultrasonic flow meters.

[0061] Specifically, the high-pressure measuring unit 2 can realize online real-time continuous measurement of dissolved oxygen, dissolved hydrogen, conductivity and boron concentration under a certain system pressure (such as 15.5Mpa), and the measured water quality sample can flow directly back to the system. After the water quality sample flows into the water quality sample processing unit 1, it is divided into two branches according to the use conditions of the subsequent measurement chemical instrument, and the two branches are independent of each other. One of the branches is adjusted to a certain value (such as 10-30L / h) by the first flow measurement device F01 and the first needle valve V03, and then enters the downstream chemical measurement device (chemical instrument). The downstream chemical measurement device includes: dissolved oxygen content measurement device M1, dissolved hydrogen content measurement device M2, and conductivity measurement device M3. These three devices are combined in a series bypass arrangement, and the connection order can be interchanged. A three-way valve is set at the inlet end of each measuring device. When the measuring device needs to be used, the three-way valve is rotated to connect with the measuring device; when the measuring device is not needed, the three-way valve is rotated to connect with the bypass. This method can realize the use of the three measuring devices separately, and also They can be used in pairs or in full. After being measured by the above-mentioned measuring equipment, the water quality sample flows back to the system through the fourth stop valve V07. The fourth stop valve V07 and the first needle valve V03 at the front end of the branch serve to cut off the branch. The other branch cooperates with the second flow measuring equipment F02 and the second needle valve V08 to adjust the flow of the water quality sample to a certain value (such as 50-200L / h) and then enters the downstream boron concentration analysis equipment. The boron concentration analysis equipment adopts the neutron measurement principle. After being measured, the water quality sample of this branch flows back to the system through the fifth stop valve V09 together with the water quality sample measured by another branch. The second needle valve V08 and the fifth stop valve V09 at the front end of the branch serve to cut off the branch.

[0062] In some embodiments, the low-pressure measuring unit 2 includes: a pH value measuring device M5 and an ion concentration monitoring device M6, the pH value measuring device M5 and the ion concentration monitoring device M6 are respectively connected to the water quality sample processing unit 1, the pH value measuring device M5 and the ion concentration monitoring device M6 are connected in parallel, and the pH value measuring device M5 and the ion concentration monitoring device M6 are respectively connected to the control unit 4; the pH value measuring device M5 and the ion concentration monitoring device M6 are respectively used to measure the pH value and ion concentration of the water quality sample, and feed back the pH value and the ion concentration as the second measurement result to the control unit 4; the control unit 4 is used to perform water quality analysis according to the first measurement result output by the high-pressure measuring unit, as well as the pH value and the ion concentration, to obtain the water quality analysis result of the water quality sample.

[0063] In some embodiments, the low-pressure measuring unit 3 also includes: a collecting tank S03, a purification device S04, a boost pump S05 and a filter S06. The collecting tank S03, the purification device S04 and the boost pump S05 are connected in series in sequence and connected to the outlet end of the pH value measuring device M5. The inlet end of the ion concentration monitoring device M6 is connected to the outlet end of the filter S06.

[0064] In some embodiments, the low-pressure measuring device 3 further includes: a third flow measuring device F03, a fourth flow measuring device F04, a third needle valve V13, a fourth needle valve V16, a sixth stop valve V15, a seventh stop valve V17, a check valve V14 and a third pressure measuring device P03, wherein the third needle valve V13 is connected to the inlet end of the pH value measuring device M5, the fourth needle valve V16 is connected to the inlet end of the filter S06, the two ends of the check valve V14 are respectively connected to the outlet end of the boost pump S05 and the sixth stop valve V15, the seventh stop valve V17 is connected to the outlet end of the ion concentration monitoring device M6, the third flow measuring device F03, the fourth flow measuring device F04 and the third pressure measuring device P03 are respectively connected to the control unit 4; the third flow measuring device F03 is used to measure the The third flow rate of the water quality sample at the inlet end of the third needle valve V13, and the third flow rate is fed back to the control unit 4; the fourth flow measuring device F04 is used to measure the fourth flow rate of the water quality sample at the inlet end of the fourth needle valve V16, and the fourth flow rate is fed back to the control unit 4; the control unit 4 is also used to adjust the opening of the third needle valve V13 according to the third flow rate to control the water quality sample flow rate of the branch where the pH value measuring device M5 is located, and at the same time, adjust the opening of the fourth needle valve according to the fourth flow rate to control the water quality sample flow rate of the branch where the ion concentration monitoring device M6 is located; the third pressure measuring device P03 is used to measure the third pressure at the outlet end of the boost pump S05, and feed back the third pressure to the control unit 4; the control unit 4 is also used to adjust the parameters of the boost pump S05 according to the third pressure.

[0065] The third flow measurement device F03 and the fourth flow measurement device F04 may be mass flow meters or ultrasonic flow meters. The pH value measurement device may be a pH meter. The purification device S04 may be an ion exchange resin, which may be filled according to the water quality of the loop system. For example, hydrogen-oxygen type resin may be filled for neutral water quality, and boron-lithium type resin may be used for boron-lithium alkaline water quality.

[0066] Specifically, after the water quality sample flows into the water quality sample processing unit 1, it is divided into two branches, and the two branches are independent of each other. One of the branches is coordinated by the third flow measuring device F03 and the third needle valve V13 to adjust the flow rate of the water quality sample to a certain value (such as 10-30L / h) and then enter the downstream pH value measuring device M5. Limited by the principle of the pH value measuring device M5 (it will introduce external chemical substances, such as Cl-, etc.), the water quality samples measured by the pH value measuring device M5 are generally discharged directly. Since discharge will cause water loss in the system, PH measurement mostly adopts intermittent measurement method. In the embodiment of the present invention, the water quality sample measured by the pH value measuring device M5 enters the S03 collection tank, and then is purified by the purification device S04 to ensure that the water quality sample is consistent with the water quality of the loop system, and then is pressurized by the booster pump S05 and flows back to the system. Among them, the function of the collection tank S03 is to prevent the inlet end of the purification device S04 and the booster pump S05 from being suddenly interrupted due to the interruption of the sample flow and damaging the equipment. The check valve V14 is set at the outlet end of the booster pump S05 to prevent the water quality sample from flowing back. By setting The third pressure measuring device P03 monitors the pressure at the outlet end of the boost pump S05 and can adjust various parameters of the boost pump S05 to meet the use requirements. The third needle valve V13 and the sixth stop valve V15 can realize the opening and closing of the branch; the other branch is cooperated with the fourth flow measuring device F04 and the fourth needle valve V16 to adjust the flow rate of the water quality sample to a certain value (such as 0.06L / h), and then filtered twice through the filter S06 (the pipeline entering the ion chromatography is a 1 / 16-inch tube). The filter S06 adopts physical filtration and is a sintered or filter mesh filter with a filter diameter of ≤20μm. In this way, the water quality sample can be directly discharged after being filtered and entering the downstream ion concentration monitoring device M6 for measurement. The ion concentration measurement content includes Li+, Na+, Cl-, F-, SO42-. Due to the working principle of the ion concentration monitoring device, the branch is intermittently opened and the flow rate is small (only tens of milliliters / hour). The seventh stop valve V17 and the fourth needle valve V16 jointly realize the opening and closing of the branch.

[0067] In some embodiments, the control unit 4 is specifically used to calculate the deviation value, the dosage and the water injection dilution amount according to the first measurement result and the second measurement result, and adjust the water quality according to the deviation value, the dosage and the water injection dilution amount.

[0068] Specifically, the control unit 4 can not only realize automatic control and interlocking of electric valves and equipment through the measured temperature, pressure and flow data, protect the safety of instrument use and realize online automatic monitoring. It can also perform water quality analysis based on the measured oxygen content, hydrogen content, conductivity, boron concentration, pH value and ion concentration, and provide feedback information for water quality regulation, that is, according to the measured oxygen content, hydrogen content, conductivity, boron concentration, pH value and ion concentration, calculate the deviation value, dosage, water injection dilution amount, and the flow rate and running time of the purification resin in the loop system, etc., which are used to adjust the system water quality. The parameters involved in the method, thereby realizing online automatic analysis of water quality, and finally achieving full closed-loop control of water quality monitoring and analysis. The specific formula is as follows:

[0069] Deviation value = measured value - reference value

[0070] The measured values ​​specifically refer to the measured values ​​of oxygen content, hydrogen content, conductivity, boron concentration, pH value and ion concentration, and the reference values ​​specifically refer to the reference values ​​of oxygen content, hydrogen content, conductivity, boron concentration, pH value and ion concentration. The deviation values ​​of oxygen content, hydrogen content, conductivity, boron concentration, pH value and ion concentration can be calculated respectively by the above formulas.

[0071] Furthermore, if a certain measured value is less than its corresponding reference value, the dosage needs to be increased. The specific calculation formula is as follows:

[0072] Dosage = (reference value - measured value) × loop water volume

[0073] Furthermore, if a certain measured value is greater than its corresponding reference value, water injection is required for dilution. The specific calculation formula for the amount of water injection dilution is as follows:

[0074] Water injection dilution amount = (measured value - reference value) × loop water volume / reference value

[0075] Furthermore, when the measured value is greater than the reference value, in addition to the water injection dilution method, the purification method can also be used to remove a certain amount. For this method, the specific calculation formula for the purification resin operation time is as follows:

[0076] Purification resin operation time in the loop system = [(measured value - reference value) × loop water volume] / (measured value × purification resin flow rate)

[0077] In addition, the water quality online monitoring and analysis device in the embodiment of the present invention adopts a closed cabinet design, such as Figure 3As shown, it is divided into two layers, the upper layer is the control unit, with a built-in touch screen display and operation, and the lower layer is arranged with a water quality sample processing unit, a high-pressure measurement unit and a low-pressure measurement unit, as well as process pipelines for connection. The overall size of the cabinet can be adjusted according to actual business needs. The embodiment of the present invention provides a preferred size: the length is less than or equal to 2000mm, the width is less than or equal to 800mm. The height is less than or equal to 1800mm, and rollers are set at the bottom of the cabinet.

[0078] Compared with the prior art, the online water quality monitoring and analysis device provided by the embodiment of the present invention can monitor and analyze water quality in real time and ensure the accuracy of the water quality analysis results. In addition, the embodiment of the present invention can also prevent test personnel from suffering from radioactive hazards when taking samples on site.

[0079] Those skilled in the art will appreciate that the accompanying drawings are only schematic diagrams of a preferred implementation scenario, and the modules or processes in the accompanying drawings are not necessarily necessary for implementing the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario can be distributed in the devices of the implementation scenario according to the description of the implementation scenario, or can be changed accordingly and located in one or more devices different from the present implementation scenario. The modules of the above-mentioned implementation scenario can be combined into one module, or can be further split into multiple submodules.

[0080] The above serial numbers of this application are only for description and do not represent the advantages and disadvantages of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of this application, but this application is not limited to them, and any changes that can be thought of by technicians in this field should fall within the scope of protection of this application.

Claims

1. A water quality online monitoring and analysis device, characterized in that: include: A water quality sample processing unit, a high pressure measuring unit, a low pressure measuring unit and a control unit, wherein the high pressure measuring unit is connected to the water quality sample processing unit and the control unit respectively, and the low pressure measuring unit is connected to the water quality sample processing unit and the control unit respectively; The water quality sample processing unit is used to safely process the original water quality sample to obtain the water quality sample to be tested; The high-pressure measuring unit and the low-pressure measuring unit are respectively used to measure the water quality sample to obtain a first measurement result output by the high-pressure measuring unit and a second measurement result output by the low-pressure measuring unit; The control unit is used to perform water quality analysis according to the first measurement result and the second measurement result to obtain a water quality analysis result of the water sample.

2. The device according to claim 1, characterized in that The water quality sample processing unit comprises: a filter and a cooler, one end of the cooler is connected to the filter, and the other end of the cooler is respectively connected to the high pressure measuring unit and the low pressure measuring unit; The water quality sample flows into the high pressure measurement unit and the low pressure measurement unit after being safely processed by the filter and the cooler respectively; and / or The control unit is specifically used to calculate the deviation value, the dosage and the water injection dilution amount according to the first measurement result and the second measurement result, and adjust the water quality according to the deviation value, the dosage and the water injection dilution amount.

3. The device according to claim 2, characterized in that The water quality sample processing unit also includes: a first temperature measuring device, a second temperature measuring device, a first pressure measuring device, a first stop valve, a second stop valve and a third stop valve, wherein the first stop valve is connected to the inlet end of the filter, the outlet end of the filter is connected to the inlet end of the cooler, the outlet end of the cooler is connected to the high pressure measuring unit through the second stop valve, and is connected to the low pressure measuring unit through the third stop valve, the second stop valve is connected in parallel with the third stop valve, and the first temperature measuring device, the second temperature measuring device and the first pressure measuring device are respectively connected to the control unit; The first temperature measuring device and the first pressure measuring device are used to measure the first temperature and the first pressure of the water sample in the pipeline between the first stop valve and the filter, respectively, and feed the first temperature and the first pressure back to the control unit; The control unit is used to control the opening and closing of the first stop valve according to the first temperature and the first pressure; The second temperature measuring device is used to measure the second temperature of the water sample in the pipeline between the cooler and the second stop valve and the third stop valve, and feed the second temperature back to the control unit; The control unit is further used to adjust the opening of the cooler valve according to the second temperature, and to control the opening and closing of the second stop valve and the third stop valve.

4. The device according to claim 3, characterized in that The water quality sample processing unit further includes: a pressure reducing mechanism, a second pressure measuring device and a pressure releasing mechanism, wherein the pressure releasing mechanism is connected in series with the pressure reducing mechanism and then connected to the third stop valve, and the second pressure measuring device is connected to the control unit; The second pressure measuring device is used to measure the second pressure of the water quality sample at the outlet end of the pressure reducing mechanism and feed the second pressure back to the control unit; The control unit is further used to adjust the opening of the pressure reducing mechanism according to the second pressure, and to control the opening and closing of the third stop valve.

5. The device according to claim 1, characterized in that The high-voltage measurement unit comprises: a dissolved oxygen content measurement device, a dissolved hydrogen content measurement device, a conductivity measurement device and a boron concentration analysis device, wherein the dissolved oxygen content measurement device, the dissolved hydrogen content measurement device and the conductivity measurement device are sequentially connected in series and then connected to the water quality sample processing unit, the boron concentration analysis device is connected to the water quality sample processing unit and is connected in parallel with the dissolved oxygen content measurement device, the dissolved hydrogen content measurement device and the conductivity measurement device, and the dissolved oxygen content measurement device, the dissolved hydrogen content measurement device, the conductivity measurement device and the boron concentration analysis device are respectively connected to the control unit; The dissolved oxygen content measuring device, the dissolved hydrogen content measuring device, the conductivity measuring device and the boron concentration analyzing device are used to measure the oxygen content, hydrogen content, conductivity and boron concentration of the water quality sample, respectively, and send the oxygen content, hydrogen content, conductivity and boron concentration as the first measurement result to the control unit; The control unit is used to perform water quality analysis based on the oxygen content, the hydrogen content, the conductivity and the boron concentration, and the second measurement result output by the low-pressure measurement unit to obtain the water quality analysis result of the water quality sample.

6. The device according to claim 5, characterized in that The high-pressure measuring unit further includes: a first flow measuring device, a second flow measuring device, a first needle valve, a second needle valve, a fourth stop valve and a fifth stop valve; the first needle valve is connected to the inlet end of the dissolved oxygen content measuring device, the second needle valve is connected to the inlet end of the boron concentration analysis device, the fourth stop valve is connected to the outlet end of the conductivity measuring device, the fifth stop valve is connected to the outlet end of the boron concentration analysis device, and the first flow measuring device and the second flow measuring device are respectively connected to the control unit; The first flow measurement device is used to measure a first flow of the water quality sample at the inlet end of the first needle valve, and feed the first flow back to the control unit; The second flow measurement device is used to measure a second flow of the water quality sample at the inlet end of the second needle valve, and feed the second flow back to the control unit; The control unit is also used to adjust the opening of the first needle valve according to the first flow rate to control the water quality sample flow rate of the branch where the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device are located, and at the same time adjust the opening of the second needle valve according to the second flow rate to control the water quality sample flow rate of the branch where the boron concentration analysis device is located.

7. The device according to claim 6, characterized in that The high-pressure measuring unit further includes: three-way valves respectively located at the inlet ends of the dissolved oxygen content measuring device, the dissolved hydrogen content measuring device and the conductivity measuring device.

8. The device according to claim 1, characterized in that The low-pressure measuring unit comprises: a pH value measuring device and an ion concentration monitoring device, wherein the pH value measuring device and the ion concentration monitoring device are respectively connected to the water quality sample processing unit, the pH value measuring device and the ion concentration monitoring device are connected in parallel, and the pH value measuring device and the ion concentration monitoring device are respectively connected to the control unit; The pH value measuring device and the ion concentration monitoring device are used to measure the pH value and ion concentration of the water quality sample, respectively, and feed back the pH value and the ion concentration as the second measurement result to the control unit; The control unit is used to perform water quality analysis based on the first measurement result output by the high-voltage measurement unit, as well as the pH value and the ion concentration, to obtain a water quality analysis result of the water sample.

9. The device according to claim 8, characterized in that The low-pressure measuring unit also includes: a collecting tank, a purification device, a booster pump and a filter. The collecting tank, the purification device and the booster pump are connected in series in sequence and connected to the outlet end of the pH value measuring device. The inlet end of the ion concentration monitoring device is connected to the outlet end of the filter.

10. The device according to claim 9, characterized in that The low-pressure measuring device further includes: a third flow measuring device, a fourth flow measuring device, a third needle valve, a fourth needle valve, a sixth stop valve, a seventh stop valve, a check valve and a third pressure measuring device, wherein the third needle valve is connected to the inlet end of the pH value measuring device, the fourth needle valve is connected to the inlet end of the filter, the two ends of the check valve are respectively connected to the outlet end of the boost pump and the sixth stop valve, the seventh stop valve is connected to the outlet end of the ion concentration monitoring device, and the third flow measuring device, the fourth flow measuring device and the third pressure measuring device are respectively connected to the control unit; The third flow measurement device is used to measure the third flow of the water quality sample at the inlet end of the third needle valve, and feed back the third flow to the control unit; The fourth flow measurement device is used to measure a fourth flow of the water quality sample at the inlet end of the fourth needle valve, and feed the fourth flow back to the control unit; The control unit is further used to adjust the opening of the third needle valve according to the third flow rate to control the water quality sample flow rate of the branch where the pH value measuring device is located, and at the same time adjust the opening of the fourth needle valve according to the fourth flow rate to control the water quality sample flow rate of the branch where the ion concentration monitoring device is located; The third pressure measuring device is used to measure the third pressure at the outlet of the boost pump and feed back the third pressure to the control unit; The control unit is further used to adjust the parameters of the boost pump according to the third pressure.

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