Ion chromatography detection system for zinc and nickel ions in primary loop of nuclear power plant

Abstract

The present invention relates to the technical field of ion chromatography detection, and specifically relates to an ion chromatography detection system for zinc and nickels in a primary loop of a nuclear power plant, comprising a sample injection assembly and an ion detection assembly, an enrichment column being provided between the sample injection assembly and a detection element, so as to implement effective enrichment and concentration of target ions in a sample under test. During a detection process in which a high-sensitivity conductivity detector is used, the present invention can detect zinc and nickel ions with high precision, ameliorating the problems of high lower limit of detection, low detection sensitivity and low throughput; detect trace zinc and nickel ions without providing a suppressor in the ion detection assembly, that is, successfully detect target compounds of relatively low concentrations in the sample and achieve relatively high measurement accuracy, improving the detection sensitivity of the ion detection assembly to trace elements; and accurately control and monitor the amount of zinc added during the operation of the nuclear power plant and promptly discover problems such as possible pipeline corrosion, avoiding more serious equipment damage or safety accidents.

Description

Zinc and nickel ion ion chromatography detection system in primary loop of nuclear power plant TECHNICAL FIELD

[0001] The present application relates to the technical field of ion chromatography detection, in particular to a zinc and nickel ion ion chromatography detection system in primary loop of nuclear power plant. BACKGROUND

[0002] Zinc is added to the primary loop coolant of pressurized water reactor nuclear power plant, which can effectively reduce the external radiation field of the reactor core in the power plant using alloy 690 as the evaporator heat pipe material. The zinc addition technology of pressurized water reactor has been widely used in many nuclear power plants abroad and has achieved good results. However, the amount of zinc added needs to be accurately controlled, so the determination of zinc ion content in the coolant is crucial. In addition, nickel-based alloy is the main structural material in the primary loop of pressurized water reactor nuclear power plant, mainly used for manufacturing steam generator heat transfer pipes. The nuclear power plant monitors the nickel content in the primary loop coolant to determine the corrosion of the system. The current detection equipment is prone to interference from other high-concentration ions in the loop when detecting trace amounts of zinc and nickel ions (concentration of μg / L level), resulting in unsatisfactory detection results and low detection accuracy, which affects the supervision and judgment of zinc and nickel concentration. Therefore, based on the above problems, it is of great significance to develop a zinc and nickel ion detection system with high detection sensitivity and high detection accuracy suitable for the primary loop of nuclear power plant.

[0003] SUMMARY

[0004] The purpose of the present application is to provide a zinc and nickel ion ion chromatography detection system in primary loop of nuclear power plant, which sets an enrichment column between the sample injection assembly and the detection element to solve the technical problems in the background.

[0005] To solve the above technical problems, the technical solution provided by the present application is to provide a zinc and nickel ion ion chromatography detection system in primary loop of nuclear power plant, which includes a sample injection assembly and an ion detection assembly. The sample injection assembly is arranged at the first end of the ion detection assembly. The sample injection assembly includes a multi-position selection valve and a sample injection pipeline. The multi-position selection valve is connected to the ion detection assembly through the sample injection pipeline. The ion detection assembly includes an enrichment column, a multi-position injection valve, a chromatographic column, and a conductivity detector. One end of the enrichment column is connected to the sample injection pipeline, and the other end is connected to the multi-position injection valve. The multi-position injection valve is also connected to a washing liquid pipeline. One end of the chromatographic column is connected to the multi-position injection valve, and the other end is connected to the conductivity detector. The end of the conductivity detector is connected to a first waste liquid pipeline.

[0006] On the basis of the above technical solution, a sample plunger pump is arranged on the sample injection pipeline and located at the first end of the enrichment column.

[0007] On the basis of the above technical solution, the first end of the multi-position selection valve is also connected to a quality control sample tank.

[0008] On the basis of the above technical scheme, the first end of the elution liquid pipeline is connected with an elution liquid preparation assembly, the elution liquid preparation assembly comprises an elution liquid stock solution bottle, an elution stock solution pipeline, a first metering pump and an elution liquid tank, one end of the elution stock solution pipeline is connected with the elution liquid stock solution bottle, the other end of the elution stock solution pipeline is connected with the elution liquid tank, the first metering pump is arranged on the elution stock solution pipeline, and the elution liquid tank is further connected with a pure water pipeline, a pure water pump and a flow meter are arranged on the pure water pipeline.

[0009] On the basis of the above technical scheme, the ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant further comprises a pure water preparation assembly, the pure water preparation assembly comprises an EDI device, a purification resin column and an ultrapure water tank, one end of the EDI device is connected with a water inlet pipeline, the other end of the EDI device is connected with the purification resin column, the end of the purification resin column is connected with the ultrapure water tank, and a plurality of pure water pipelines are connected to the ultrapure water tank.

[0010] On the basis of the above technical scheme, the ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant further comprises a standard sample preparation assembly arranged at the first end of the sample inlet assembly, the standard sample preparation assembly comprises a standard sample stock solution bottle, a first selection valve, a second metering pump, a second selection valve and a standard sample tank, the first end of the first selection valve is connected with a standard sample stock solution pipeline and a pure water pipeline, the standard sample stock solution pipeline is connected with the standard sample stock solution bottle, one end of the second metering pump is connected with the end of the first selection valve, the other end of the second metering pump is connected with the first end of the second selection valve, the end of the second selection valve is respectively connected with a standard sample pipeline and a second waste liquid pipeline, the end of the standard sample pipeline is connected with the standard sample tank, and the standard sample tank is connected with the first end of the multi-position selection valve.

[0011] On the basis of the above technical scheme, the ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant further comprises a sample pretreatment assembly arranged at the first end of the sample inlet assembly, the sample pretreatment assembly comprises a sample tank, a filter and a degassing device, the first end of the filter is communicated with the sample tank through a sample pipeline, the end of the filter is communicated with the first end of the degassing device, and the end of the degassing device is connected with the multi-position selection valve.

[0012] On the basis of the above technical scheme, a third selection valve is arranged between the standard sample tank and the multi-position selection valve, the end of the third selection valve is further connected with a third waste liquid pipeline, and a peristaltic pump is arranged on the third waste liquid pipeline.

[0013] On the basis of the above technical scheme, the ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant further comprises a waste liquid collection assembly, the waste liquid collection assembly comprises a waste liquid collector, a waste liquid pump and a waste liquid tank, a plurality of waste liquid pipelines are connected to the waste liquid collector, the waste liquid tank is connected with the waste liquid collector through a discharge pipeline, and a waste liquid pump is arranged on the discharge pipeline.

[0014] The technical scheme provided by the application has the beneficial effects that:

[0015] The zinc and nickel ion chromatographic detection system for a nuclear power station first loop provided in the application is provided with an enrichment column between a sample injection assembly and a detection element, so that the target ions in the sample to be detected can be effectively enriched and concentrated, and the zinc and nickel ions can be detected with high precision in the detection process by using a high-sensitivity conductivity detector, thereby improving the problems of high detection lower limit, low detection sensitivity and low processing capacity; meanwhile, the detection of trace zinc and nickel ions can be realized without setting an inhibitor in the ion detection assembly, that is, even in the case that the concentration of the target compound in the sample is extremely low, the trace zinc and nickel ions can also be successfully detected and high detection precision can be realized, thereby improving the detection sensitivity of the ion detection assembly to trace elements; the accurate control and monitoring of the zinc amount in the operation process of the nuclear power station and the timely discovery of possible pipeline corrosion and other problems can be realized, thereby avoiding more serious equipment damage or safety accidents. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 is a schematic diagram of the overall structure of the zinc and nickel ion chromatographic detection system according to the application;

[0017] Fig. 2 is a schematic diagram of the structure of the sample injection assembly and the ion detection assembly according to the application;

[0018] Fig. 3 is a schematic diagram of the structure of the eluent preparation assembly according to the application;

[0019] Fig. 4 is a schematic diagram of the structure of the pure water preparation assembly according to the application;

[0020] Fig. 5 is a schematic diagram of the structure of the standard sample preparation assembly according to the application;

[0021] Fig. 6 is a schematic diagram of the structure of the waste liquid collection assembly according to the application. DETAILED DESCRIPTION

[0022] The application will be further described below in combination with the drawings and embodiments:

[0023] In the application, unless otherwise explicitly specified and limited, the terms such as "mounting", "connection", "linking", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the application can be understood according to the specific circumstances.

[0024] In the description of the present application, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", etc. indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] As shown in FIGS. 1-6, the present embodiment provides a nuclear power plant primary loop zinc, nickel ion chromatographic detection system, the nuclear power plant primary loop zinc, nickel ion chromatographic detection system includes a sample injection assembly 1 and an ion detection assembly 2, the sample injection assembly 1 is arranged at the first end of the ion detection assembly 2, the sample injection assembly 1 includes a multi-position selection valve 11 and a sample injection pipeline 12, the multi-position selection valve 11 is connected with the ion detection assembly 2 through the sample injection pipeline 12; the ion detection assembly 2 includes an enrichment column 21, a multi-position sample injection valve 22, a chromatographic column 23 and a conductivity detector 24, one end of the enrichment column 21 is connected with the sample injection pipeline 12, the other end is connected with the multi-position sample injection valve 22, the multi-position sample injection valve 22 is also connected with a eluent pipeline 30, one end of the chromatographic column 23 is connected with the multi-position sample injection valve 22, the other end is connected with the conductivity detector 24, and the conductivity detector 24 is connected with a first waste liquid pipeline 25 at the end.

[0026] The present application provides a nuclear power plant loop zinc nickel ion chromatographic detection system, an enrichment column 21 is arranged between the sample injection assembly 1 and the detection element, the target ions in the sample to be detected are effectively enriched and concentrated, high-precision zinc nickel ion detection can be realized in the detection process using a high-sensitivity conductivity detector 24, and the problems of high detection lower limit, low detection sensitivity and low processing capacity are improved; at the same time, the ion detection assembly 2 does not need to be provided with an inhibitor to realize the detection of trace zinc nickel ions, that is, in the case that the concentration of the target compound in the sample is extremely low, the trace zinc nickel ions can also be successfully detected and high-precision detection accuracy can be realized, and the detection sensitivity of the ion detection assembly to trace elements is improved; the accurate control and monitoring of the zinc amount during the operation of the nuclear power plant and the timely discovery of possible pipeline corrosion and other problems can be realized, and more serious equipment damage or safety accidents can be avoided.

[0027] Specifically, by setting the sample inlet assembly 1, a plurality of different samples can be selected to enter the subsequent ion detection assembly 2 for detection, such as a sample to be detected, a standard sample or a quality control sample, etc., and the sample solution to be selected to enter is selected according to the actual detection requirement; when the sample to be detected is detected, especially when the sample solution to be detected with low ion concentration is detected, the enrichment column 21 is arranged before the detection element, and the enrichment column 21 can enrich the ions to be detected in the sample to be detected after multiple sampling, so that the detection of the low-concentration solution can be realized, and the detection sensitivity can be improved without setting the inhibitor in the ion detection assembly 2. In the ion detection assembly 2, the eluent is prepared by the eluent preparation assembly 3, and also enters the subsequent detection elements such as the chromatographic column 23 and the conductivity detector 24 through different channels of the multi-position sampling valve 22, and cooperates to realize the concentration detection of the ions to be detected; wherein the chromatographic column is a key component in ion chromatography analysis, the chromatographic column 23 selects a cation chromatographic column and an anion chromatographic column according to the ions in the sample to be detected, such as a cation chromatographic column when detecting zinc ions, and is replaced according to the actual working condition, and is more convenient to use, and the effective separation of each component in the mixture is realized according to the different physical and chemical properties of the substances to be separated; the conductivity detector 24 is used to measure the conductivity change of the effluent to obtain ion concentration information; finally, the data processing system receives the electrical signal output by the conductivity detector to form a calibration curve or a chromatogram, etc., and performs peak identification and quantitative calculation, etc. It should be noted that the chromatographic column and the conductivity detector components can be obtained from the prior art, as long as the ion chromatography detection is realized, and the application does not involve the improvement of the specific structure of the above components.

[0028] More preferably, the end of the multi-position sampling valve 22 is also connected with a fourth waste liquid pipeline 26, so as to facilitate the collection of waste liquid generated in the cleaning process of the pipeline in the system by using pure water.

[0029] On the basis of the above technical scheme, the sampling pipeline 12 is provided with a sampling plunger pump 13 located at the first end of the enrichment column 21.

[0030] By using the plunger pump as the sampling pump, the accuracy is high, the reproducibility is good, a higher working pressure can be provided, and stable conveying can be realized; since the enrichment column is used for enrichment sampling in the application, the enrichment column itself has a certain pressure, and the use of the plunger pump as the sampling pump can ensure that there is enough power to enrich the sample on the enrichment column during the use of the enrichment sampling method, and the sampling amount is accurate and has good consistency; in addition, the plunger pump can also facilitate the adjustment of the flow, and adapt to the requirements of different working conditions.

[0031] On the basis of the above technical scheme, the multi-position selection valve 11 is also connected with a quality control sample tank 4 at the first end.

[0032] In the preferred embodiment, the system stability can be self-checked by introducing a quality control sample with a certain concentration, effectively monitoring the performance of the analysis process, identifying and correcting potential problems in a timely manner, improving the overall analysis and detection quality, and being convenient, time-saving and labor-saving, and improving the detection efficiency. At the same time, the detection of the quality control sample can be used to determine whether the calibration curve needs to be calibrated between sample detections, or to determine the stability of the detection instrument during multiple sample detections, or to determine the consistency of the system analysis performance after the sample detection is completed. That is, the quality control sample can be detected in multiple stages of the detection system operation to determine the stability of the system operation. The corresponding quality control sample is selected according to the ion species to be detected in the sample, such as the zinc ion quality control sample and the nickel ion quality control sample in the application.

[0033] On the basis of the above technical scheme, the first end of the eluent pipeline 30 is connected with an eluent preparation assembly 3, the eluent preparation assembly 3 comprises an eluent stock solution bottle 31, an eluent stock solution pipeline 32, a first metering pump 33 and an eluent tank 34, one end of the eluent stock solution pipeline 32 is connected with the eluent stock solution bottle 31, the other end is connected with the eluent tank 34, the first metering pump 33 is arranged on the eluent stock solution pipeline 32, and the eluent tank 34 is further connected with a pure water pipeline 50, and the pure water pipeline 50 is provided with a pure water pump 35 and a flow meter 36.

[0034] Preferably, the eluent preparation assembly 3 is arranged in the embodiment, so that the required eluent can be automatically prepared on line during ion detection, the operation is more convenient, and problems such as pollution or error caused by the storage of the traditional eluent prepared in advance can be reduced, and the detection accuracy in the subsequent process is ensured; specifically, the required amount of eluent stock solution enters the eluent tank 34 through the eluent stock solution pipeline 32 under the action of the first metering pump 33, and the metering pump can realize accurate delivery; meanwhile, the required amount of pure water is introduced into the eluent tank 34 under the action of the pure water pump 35, wherein the flow meter 36 on the pure water pipeline 50 facilitates the counting of the amount of pure water; after the eluent stock solution and the pure water are uniformly mixed in the eluent tank 34, the eluent with the required concentration is obtained, and then enters the subsequent detection element through the multi-position sampling valve 22.

[0035] On the basis of the above technical scheme, the nuclear power station primary circuit zinc and nickel ion ion chromatography detection system further comprises a pure water preparation assembly 5, the pure water preparation assembly 5 comprises an EDI device 51, a purification resin column 52 and an ultrapure water tank 53; one end of the EDI device 51 is connected with a water inlet pipeline 54, the other end is connected with the purification resin column 52, the tail end of the purification resin column 52 is connected with the ultrapure water tank 53, and the ultrapure water tank 53 is connected with a plurality of pure water pipelines 50.

[0036] In the present application, by setting the pure water preparation assembly 5, ultra-pure water can be automatically generated online and used in the detection system. The traditional ultra-pure water tank does not need to be manually supplemented with ultra-pure water, which is more convenient to operate, and can also ensure the cleanliness of the ultra-pure water and the accuracy of the ion chromatography detection data. Specifically, in the preferred embodiment of the present application, since the purity of the ultra-pure water required in the system is higher than that of pure water, the desalted water that has been preliminarily purified is introduced into the pure water preparation assembly, or untreated water can be introduced according to the requirements, and the ultra-pure water meeting the use requirements is obtained after multiple purifications. The desalted water is purified by the EDI device 51 and the purification resin column 52 in turn, and the prepared ultra-pure water is stored in the ultra-pure water tank. The EDI device 51 can further purify the desalted water introduced into the system, and then pass through the purification resin column 52 to remove ions again, so as to reach an extremely low ion residue level and meet the requirements of ultra-pure water, i.e. the resistivity needs to reach 18.25MΩ*cm, thereby laying a foundation for subsequent accurate detection.

[0037] It should be noted that the EDI (Electrodeionization) device in the present application can be obtained from the prior art, and the main purpose is to obtain ultra-pure water. Its basic principle is to use electric field force to drive the ions in water to pass through the ion exchange membrane to realize the directional migration and separation of ions, and at the same time cooperate with the regeneration process of ion exchange resin to continuously remove ion pollutants in water. The core components of the common EDI device include ion exchange membrane stack, direct current power supply, concentrated water circulating pump and related control and monitoring equipment, etc.

[0038] More preferably, the ultra-pure water tank 53 is provided with a liquid level sensor. By setting the liquid level sensor, the ultra-pure water in the ultra-pure water tank 53 can be prepared and supplemented in time to meet the demand of ultra-pure water in the system. The ultra-pure water tank 53 is connected with a plurality of pure water pipelines 50, which can provide pure water for a plurality of components in the detection system that need pure water, such as the standard sample preparation assembly 6, the eluent preparation assembly 3, and the cleaning pipeline in the detection system, so that the use is more convenient.

[0039] On the basis of the above technical solutions, the ion chromatography detection system for zinc and nickel ions in the primary loop of the nuclear power plant further comprises a standard sample preparation assembly 6 arranged at the first end of the sample injection assembly 1, wherein the standard sample preparation assembly 6 comprises a standard sample mother liquor bottle 61, a first selection valve 62, a second metering pump 63, a second selection valve 64, and a standard sample tank 65, the first selection valve 62 is connected with a standard sample mother liquor pipeline 66 and a pure water pipeline 50 at the first end, the standard sample mother liquor pipeline 66 is connected with the standard sample mother liquor bottle 61, one end of the second metering pump 63 is connected with the first selection valve 62 at the end, and the other end is connected with the second selection valve 64 at the first end, the end of the second selection valve 64 is respectively connected with a standard sample pipeline 67 and a second waste liquid pipeline 68, the end of the standard sample pipeline 67 is connected with the standard sample tank 65, and the standard sample tank 65 is connected with the first end of the multi-position selection valve 11.

[0040] In the present application, by arranging the standard sample preparation assembly 6, the online automatic preparation of the standard sample solution used in the calibration curve can be realized, and the preparation, storage, and use of the standard sample do not need to be manually operated or manually assisted by the preparation instrument, the working efficiency is high, the storage steps are reduced, the concentration preparation precision of the standard sample solution is high and the consistency is good, the adverse effects of the dead volume of the preparation instrument on the solution concentration precision are avoided, and the subsequent high detection precision is ensured.

[0041] Especially in cooperation with the pure water preparation assembly 5, the operation is more convenient, the preparation efficiency is high, and the subsequent detection precision can be ensured; specifically, the ultrapure water from the ultrapure water tank 53 passes through the pure water pipeline 50, the mother liquor from the standard sample mother liquor bottle 61 passes through the standard sample mother liquor pipeline 66, and then flows through the first selection valve 62, the second metering pump 63, the second selection valve 64, and the standard sample pipeline 67 to enter the standard sample tank 65, wherein the second metering pump 63 is arranged to accurately meter and deliver the preset delivery amount of ultrapure water and mother liquor, that is, by adding a preset volume of ultrapure water and mother liquor in the standard sample tank, a standard sample solution with a corresponding concentration is obtained by mixing and diluting; the preparation of a plurality of standard sample solutions with different concentrations can be prepared by delivering the required volume of ultrapure water and mother liquor to the standard sample tank according to the preset concentration. After the online preparation of standard sample solutions with different concentrations, the sample is injected for detection, the determination of the calibration curve is realized, the operation is simple and convenient, the concentration change caused by the traditional standard sample preparation and storage is reduced, and the problem of low detection precision is caused. At the same time, the second waste liquid pipeline 68 is also connected to the second selection valve 64, which facilitates the cleaning of the pipeline before the standard sample tank 65 in the standard sample preparation assembly 6, that is, the ultrapure water in the ultrapure water tank 53 sequentially passes through the pure water pipeline 50, the first selection valve 62, the second metering pump 63, and the second selection valve 64, and then flows out through the second waste liquid pipeline 68 to complete the cleaning work of the pipeline and part of the device.

[0042] In the preferred embodiment, the first end of the sample injection assembly 1 is connected with the sample pretreatment assembly 7, the standard sample preparation assembly 6 and the quality control sample tank 4 respectively, so as to realize the selective injection of the sample to be tested, the standard sample or the quality control sample, and complete the detection of the ion concentration in the sample to be tested, the calibration of the calibration curve and the judgment of the system stability through the subsequent ion detection assembly, thereby making the operation more flexible and the applicability stronger.

[0043] On the basis of the above technical solution, the ion chromatography detection system for zinc and nickel ions in the primary loop of the nuclear power plant further comprises a sample pretreatment assembly 7 arranged at the first end of the sample injection assembly 1, wherein the sample pretreatment assembly 7 comprises a sample tank, a filter 71 and a degassing device 72, the first end of the filter 71 is communicated with the sample tank through a sample pipeline 73, the last end is communicated with the first end of the degassing device 72, and the last end of the degassing device 72 is connected with the multi-position selection valve 11.

[0044] In the present application, the sample pretreatment assembly 7 is arranged before sample injection and detection, so as to pretreat the sample to be tested, which can effectively prevent pollution, reduce the influence of impurities possibly existing in the sample on the detection result, and protect the subsequent ion detection assembly and maintain the analysis performance. Specifically, the prepared sample solution to be tested is stored in the sample tank, when the sample to be tested needs to be detected, the sample to be tested enters the filter through the sample pipeline, so as to remove the particulate matter, suspended matter and other impurities possibly existing in the sample to be tested, which may interfere with the analysis result or damage the chromatography system, so as to ensure the purity of the sample and improve the accuracy and sensitivity of the analysis; the sample solution to be tested flowing out of the filter enters the degassing device, so as to remove the dissolved gas contained in the sample solution to be tested and eliminate the interference of the bubbles, so as to maintain the stable flow rate and pressure in the conveying process and ensure the accuracy of the ion chromatography analysis and the normal operation of the instrument.

[0045] It should be noted that the filter and the degassing device in the present embodiment can be obtained from the prior art; the filter is a filter device such as a common needle type sample filter, a microporous filter membrane or a pretreatment column, and the degassing device is an online degassing device such as a common vacuum degassing, membrane degassing or heating degassing.

[0046] On the basis of the above technical solution, the third selection valve 8 is arranged between the standard sample tank 65 and the multi-position selection valve 11, the last end of the third selection valve 8 is further connected with a third waste liquid pipeline 81, and the peristaltic pump 82 is arranged on the third waste liquid pipeline 81.

[0047] Preferably, by arranging the third selection valve 8, the pipeline in the standard sample preparation assembly 6 can be cleaned, that is, the ultrapure water introduced through the ultrapure water pipeline 50 flows through the first selection valve 62, the second metering pump 63, the second selection valve 64 and the standard sample tank 65 in sequence and then flows out from the third waste liquid pipeline 81, so as to complete the automatic cleaning of the pipeline, ensure the cleanliness of the pipeline in the system, ensure the preparation accuracy and improve the preparation efficiency.

[0048] On the basis of the above technical scheme, the zinc and nickel ion ion chromatography detection system in the primary loop of the nuclear power plant further comprises a waste liquid collecting assembly 9, the waste liquid collecting assembly 9 comprises a waste liquid collector 91, a waste liquid pump 92 and a waste liquid tank 93, a plurality of waste liquid pipelines are connected to the waste liquid collector 91, the waste liquid tank 93 is connected to the waste liquid collector 91 through a discharge pipeline 94, and the waste liquid pump 92 is arranged on the discharge pipeline 94.

[0049] By arranging the waste liquid collecting assembly 9, the waste liquid generated in the ion chromatography detection system can be collected, discharged and treated in a timely manner, which is convenient to operate and saves time and effort; specifically, a plurality of components in the detection system of the present application are involved in cleaning or working waste liquid during operation, such as the first waste liquid pipeline 25 connected at the end of the conductivity detector 24, the second waste liquid pipeline 68 arranged in the sample preparation assembly 6, the third waste liquid pipeline 81 and the fourth waste liquid pipeline 26 arranged in the ion detection assembly 2, the waste liquid in the system is collected into the waste liquid collector 91 through different waste liquid pipelines by the power provided by the waste liquid pump 92, and then discharged into the waste liquid tank, which is convenient for subsequent recycling and treatment.

[0050] It should be noted that the above-mentioned first end and end are defined according to the direction of liquid flow, which is only for the convenience of describing and understanding the technical scheme of the present application, and does not constitute a limitation on the present application. At the same time, it can be understood that the connection between the components not specially described above is connected through pipelines, as long as the liquid flow can be realized, that is, the sampling or sampling operation can be completed.

[0051] The above shows and describes the basic principles and main features of the present application, and for those skilled in the art, it is obvious that the present application is not limited to the details of the above exemplary embodiments, therefore the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

[0052] In addition, it should be understood that although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical scheme, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical schemes in each embodiment can also be properly combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A chromatographic detection system for zinc and nickel ions in the primary loop of a nuclear power plant, characterized in that, The system includes an injection assembly (1) and an ion detection assembly (2). The injection assembly (1) is located at the beginning of the ion detection assembly (2). The injection assembly (1) includes a multi-position selector valve (11) and an injection line (12). The multi-position selector valve (11) is connected to the ion detection assembly (2) through the injection line (12). The ion detection assembly (2) includes an enrichment column (21), a multi-position injection valve (22), a chromatographic column (23), and a conductivity detector (24). The enrichment column (21) is connected at one end to the injection line (12) and at the other end to the multi-position injection valve (22). The multi-position injection valve (22) is also connected to the eluent line (30). The chromatographic column (23) is connected at one end to the multi-position injection valve (22) and at the other end to the conductivity detector (24). The end of the conductivity detector (24) is connected to the first waste liquid line (25).

2. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, The injection line (12) is equipped with an injection plunger pump (13), and the injection plunger pump (13) is located at the beginning of the enrichment column (21).

3. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, The first end of the multi-position selector valve (11) is also connected to a quality control sample tank (4).

4. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, The first end of the rinsing fluid pipeline (30) is connected to the rinsing fluid preparation component (3). The rinsing fluid preparation component (3) includes a rinsing fluid mother liquor bottle (31), a rinsing fluid mother liquor pipeline (32), a first metering pump (33), and a rinsing fluid tank (34). One end of the rinsing fluid mother liquor pipeline (32) is connected to the rinsing fluid mother liquor bottle (31), and the other end of the rinsing fluid mother liquor pipeline (32) is connected to the rinsing fluid tank (34). The first metering pump (33) is installed on the rinsing fluid mother liquor pipeline (32). A pure water pipeline (50) is also connected to the rinsing fluid tank (34). A pure water pump (35) and a flow meter (36) are installed on the pure water pipeline (50).

5. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, It also includes a pure water preparation component (5), which includes an EDI device (51), a purification resin column (52), and an ultrapure water tank (53); one end of the EDI device (51) is connected to an inlet pipe (54), and the other end is connected to the purification resin column (52). The end of the purification resin column (52) is connected to the ultrapure water tank (53), and multiple pure water pipes (50) are connected to the ultrapure water tank (53).

6. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, It also includes a standard preparation component (6) set at the beginning of the sample injection component (1). The standard preparation component (6) includes a standard mother liquor bottle (61), a first selection valve (62), a second metering pump (63), a second selection valve (64), and a standard container (65). The first selection valve (62) is connected to a standard mother liquor pipeline (66) and a pure water pipeline (50) at its beginning. The standard mother liquor pipeline (66) is connected to the standard mother liquor bottle (61). One end of the second metering pump (63) is connected to the end of the first selection valve (62), and the other end of the second metering pump (63) is connected to the beginning of the second selection valve (64). The end of the second selection valve (64) is connected to a standard pipeline (67) and a second waste liquid pipeline (68). The end of the standard pipeline (67) is connected to the standard container (65), and the standard container (65) is connected to the beginning of the multi-position selection valve (11).

7. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 1, characterized in that, It also includes a sample pretreatment component (7) disposed at the beginning of the sample injection component (1). The sample pretreatment component (7) includes a sample container, a filter (71) and a degassing device (72). The beginning of the filter (71) is connected to the sample container through a sample pipeline (73). The end of the filter (71) is connected to the beginning of the degassing device (72). The end of the degassing device (72) is connected to the multi-position selector valve (11).

8. The ion chromatography detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to claim 6, characterized in that, A third selection valve (8) is provided between the standard sample tank (65) and the multi-position selection valve (11). The end of the third selection valve (8) is also connected to a third waste liquid pipeline (81), and a peristaltic pump (82) is provided on the third waste liquid pipeline (81).

9. A chromatographic detection system for zinc and nickel ions in the primary loop of a nuclear power plant according to any one of claims 1 to 8, characterized in that, It also includes a waste liquid collection assembly (9), which includes a waste liquid collector (91), a waste liquid pump (92) and a waste liquid tank (93). The waste liquid collector (91) is connected to multiple waste liquid pipelines, and the waste liquid tank (93) is connected to the waste liquid collector (91) through a discharge pipeline (94). The discharge pipeline (94) is equipped with a waste liquid pump (92).

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