Detection system of micro-nano gaseous mercury sensor

Abstract

The utility model discloses a detection system of a micro-nano gaseous mercury sensor, and relates to the technical field of mercury detection. The detection assembly comprises a reaction ring, a gas-liquid separator, an impurity remover, a mercury sensor and a detector; controlling a mercury standard solution and a reducing agent to be introduced into the reaction ring, mixing in the reaction ring, and reacting to generate gaseous mercury and a reaction solution; the reaction ring is used for introducing gaseous mercury and reaction liquid into a gas-liquid separator; the gas-liquid separator is used for separating the gaseous mercury from the reaction liquid and then introducing the separated target gaseous mercury into the impurity remover; the impurity remover is used for removing impurities from target gaseous mercury by using an impurity removing agent to obtain impurity-removed mercury gas, and introducing the impurity-removed mercury gas into the detector to obtain the concentration of mercury in the originally generated impurity-removed mercury steam; then a gas path valve is switched, so that the impurity-removed mercury gas is introduced into the mercury sensor; a mercury sensor detects the concentration of mercury in the impurity-removed mercury gas to obtain a first detection concentration; the detector detects the concentration of mercury in the secondarily generated impurity-removed mercury gas to obtain a second detection concentration; and the processor compares the first detection concentration, the second detection concentration and the original concentration to determine the detection performance of the mercury sensor.

Description

Technical Field

[0001] This application relates to the field of mercury detection technology, and in particular to a detection system for a micro / nano gaseous mercury sensor. Background Technology

[0002] Mercury sensors have a wide range of applications, including environmental monitoring, industrial automation control, medical equipment, and safety detection.

[0003] Currently, the detection of gaseous mercury using sensors typically employs the standard saturated mercury vapor heating method. This involves placing a standard mercury permeation tube containing high-purity mercury into a pre-defined, sealed container of a set volume. Mercury vapor is released under strict heating conditions. After a sufficiently long settling period, when the sealed container reaches saturation, a measured amount of saturated mercury vapor is manually extracted using a syringe and transferred to a gas mixing chamber where it is uniformly mixed with a measured amount of inert gas to obtain a mercury vapor sample of the set concentration. This sample gas is then blown into the gaseous mercury sensor, causing a reaction and adsorption, which is then detected. However, this detection method is complex and carries inherent pollution and hazards. Utility Model Content

[0004] This application provides a detection system for a micro / nano gaseous mercury sensor, which can improve detection efficiency while reducing detection pollution and hazards.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] This application provides a detection system for a micro / nano gaseous mercury sensor. The system includes a controller, a detection component, and a processor. The detection component is connected to the controller and the processor, respectively. The detection component includes a reaction loop, a gas-liquid separator, a filter, a mercury sensor, and a detector.

[0007] The controller is used to control the detection component to generate the first mercury-removing gas;

[0008] The controller is specifically used to: control the introduction of mercury standard solution and reducing agent into the reaction ring, where they are mixed and react to generate gaseous mercury and reaction liquid;

[0009] The reaction ring is used to pass the gaseous mercury and the reaction liquid into the gas-liquid separator;

[0010] The gas-liquid separator is used to separate the gaseous mercury and the reaction liquid, and then pass the separated target gaseous mercury into the impurity remover.

[0011] The impurity remover is used to remove impurities from the target gaseous mercury using a impurity remover to obtain impurity-removed mercury gas, and then introduces the impurity-removed mercury gas into the mercury sensor.

[0012] The mercury sensor is used to detect the concentration of mercury in the purified mercury gas to obtain a first detection concentration;

[0013] The controller is also used to control the secondary generation of mercury-removing gas and to control the introduction of the secondary generation of mercury-removing gas into the detector;

[0014] The detector is used to detect the concentration of mercury in the secondary generated mercury-removing gas to obtain a second detection concentration;

[0015] The processor is used to determine the detection performance of the mercury sensor based on a first detection concentration and a second detection concentration.

[0016] As one possible implementation, the detection assembly further includes a sample injection peristaltic pump connected to the reaction loop, and the controller is specifically used for:

[0017] After the peristaltic pump absorbs the mercury standard solution and the reducing agent, the mercury standard solution and the reducing agent are introduced into the reaction loop.

[0018] As one possible implementation, the detection component further includes: a first injection pump and a second injection pump;

[0019] The first injection pump is used to absorb the mercury standard solution and then pass the standard sample solution into the reaction loop; the second injection pump is used to absorb the reducing agent and then pass the reducing agent into the reaction loop.

[0020] As one possible implementation, the detection component further includes: a first directional valve and a second directional valve;

[0021] When the first injection pump absorbs the mercury standard solution, the first reversing valve is used to form a passage between the mercury standard solution and the first injection pump. When the standard sample solution is introduced into the reaction loop, the first reversing valve is used to form a passage between the first injection pump and the reaction loop.

[0022] When the second injection pump absorbs the reducing agent, the second reversing valve is used to form a passage between the reducing agent and the second injection pump. When the reducing agent is introduced into the reaction ring, the second reversing valve is used to form a passage between the second injection pump and the reaction ring.

[0023] As one possible implementation, the gas-liquid separator includes: a primary gas-liquid separator and a secondary gas-liquid separator; the primary gas-liquid separator is used to perform a first gas-liquid separation on the gaseous mercury and the reaction liquid to obtain a first gaseous mercury and a first reaction liquid, and to pass the first gaseous mercury into the secondary gas-liquid separator; the secondary gas-liquid separator is used to perform a second gas-liquid separation on the first gaseous mercury to obtain the target gaseous mercury and the second reaction liquid.

[0024] As one possible implementation, the detection system further includes: a waste liquid peristaltic pump, which is connected to the primary gas-liquid separator and the secondary gas-liquid separator respectively;

[0025] The waste liquid peristaltic pump is used to discharge the first reaction liquid and the second reaction liquid.

[0026] As one possible implementation, the detection system further includes: a third reversing valve, the first end of which is connected to the impurity remover, and the second end of which is connected to the mercury sensor or the detector;

[0027] The third reversing valve is used to introduce the mercury-removing gas into the mercury sensor or into the detector.

[0028] As one possible implementation, the controller is specifically used for:

[0029] When the first impurity-removing mercury gas is generated, the first end of the third reversing valve is connected to the impurity remover, and the second end of the third reversing valve is connected to the mercury sensor.

[0030] During the secondary generation of impurity-removing mercury gas, the first end of the third reversing valve is connected to the impurity remover, and the second end of the third reversing valve is connected to the detector.

[0031] As one possible implementation, the detection component further includes a recycler connected to the detector;

[0032] The recovery unit is used to extract and recover the target gaseous mercury detected by the mercury sensor and the detector.

[0033] The beneficial effects of the technical solutions provided in this application include at least the following:

[0034] The micro / nano gaseous mercury sensor detection system provided in this application includes: a controller, a detection component, and a processor. The detection component is connected to the controller and the processor respectively. The detection component includes: a reaction loop, a gas-liquid separator, a purifier, a mercury sensor, and a detector controller, used to control the detection component to generate purified mercury gas for the first time. The controller is specifically used to: control the introduction of a mercury standard solution and a reducing agent into the reaction loop, where they mix and react to generate gaseous mercury and a reaction liquid, and control the flow rate of argon gas introduced into the reaction and the direction of the reversing valve. The reaction loop is used to introduce gaseous mercury and the reaction liquid into the gas-liquid separator. The gas-liquid separator is used to... After separation of gaseous mercury and the reaction liquid, the separated target gaseous mercury is passed into a purification device. The purification device uses a purification agent to remove impurities from the target gaseous mercury, resulting in purified mercury gas, which is then passed into a mercury sensor. The mercury sensor detects the concentration of mercury in the purified mercury gas to obtain a first detection concentration. A controller also controls the secondary generation of purified mercury gas and controls its passage to a detector. The detector detects the concentration of mercury in the secondary generation of purified mercury gas to obtain a second detection concentration. A processor determines the detection performance of the mercury sensor based on the first and second detection concentrations. The micro / nano gaseous mercury sensor detection system provided in this application can accurately prepare calibrated concentration gaseous mercury samples without the need to prepare saturated mercury vapor. It can rapidly detect various parameters of the sensor based on micro / nano fabrication, such as adsorption performance, measurement accuracy, and repeatability. Furthermore, through reasonable standard sample selection and online reaction flow control, and by using an atomic fluorescence spectrometer detector as a gas concentration control experiment, the sensor's detection performance can be more accurately assessed. Attached Figure Description

[0035] Figure 1 A structural diagram of a detection system for a micro / nano gaseous mercury sensor provided in an embodiment of this application;

[0036] Figure 2 The structure of the detection component in a micro / nano gaseous mercury sensor detection system provided in this application embodiment. Figure 1 ;

[0037] Figure 3 The structure of the detection component in a micro / nano gaseous mercury sensor detection system provided in this application embodiment. Figure 2 .

[0038] Figure label:

[0039] 100 - Controller, 200 - Detection component, 300 - Processor;

[0040] 1-Mercury standard solution, 2-Reducing agent, 3-Sample injection peristaltic pump, 4-Reaction loop, 5-Waste liquid peristaltic pump, 6-First-stage gas-liquid separator, 7-Second-stage gas-liquid separator, 8-Impurifier, 9-Third-stage reversing valve, 10-Detector, 11-Mercury sensor, 12-Recovery unit, 13-First injection pump, 14-Second injection pump. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0043] In addition, the use of “based on” or “according to” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” or “according to” one or more conditions or values ​​can in practice be based on additional conditions or values ​​beyond those conditions.

[0044] Mercury sensors have a wide range of applications, including environmental monitoring, industrial automation control, medical equipment, and safety detection.

[0045] Currently, the detection of gaseous mercury using sensors typically employs the standard saturated mercury vapor heating method. This involves placing a standard mercury permeation tube containing high-purity mercury into a pre-defined, sealed container of a set volume. Mercury vapor is released under strict heating conditions. After a sufficiently long settling period, when the sealed container reaches saturation, a measured amount of saturated mercury vapor is manually extracted using a syringe and transferred to a gas mixing chamber where it is uniformly mixed with a measured amount of inert gas to obtain a mercury vapor sample of the set concentration. This sample gas is then blown into the gaseous mercury sensor, causing a reaction and adsorption, which is then detected. However, this detection method is complex and carries inherent pollution and hazards.

[0046] The main drawbacks of existing technologies are as follows: First, the standard mercury permeation tube containing high-purity mercury is a potential source of mercury leakage and can easily cause contamination. Second, a heated, sealed container is required to prepare saturated mercury vapor, which is fatal to humans, necessitating extremely robust sealing measures in the laboratory. Third, the extraction and mixing of a measured amount of saturated mercury vapor with an inert gas requires gas transfer, increasing experimental risks, especially during repeated tests. This poses a significant safety hazard and demands extremely high levels of skill and concentration from the personnel. Otherwise, any gas leak or spillage would be extremely dangerous for the personnel. Fourth, while mixing with an inert gas reduces the mercury concentration, it does not completely dilute the saturated mercury vapor, leaving a small amount remaining in the pipeline. This poses a significant risk in the disposal of waste gas after the experiment. Therefore, experiments must be conducted in a non-contact isolation chamber or a negative pressure chamber within the laboratory. Sufficient ventilation and exhaust gas treatment systems are also essential to ensure laboratory safety and environmental friendliness. Finally, extreme care and caution must be exercised in the preservation and disposal of standard parts after the experiment. Standard parts that are not completely depleted must be stored in a sealed container at low temperatures. Expired standard parts must also be disposed of in a harmless manner and properly placed. Furthermore, the excessively long preparation period for experimental testing makes it difficult to conduct large-scale testing of sensors, i.e., aging experiments.

[0047] This application provides a detection system for a micro / nano-scale gaseous mercury sensor, capable of rapidly providing safe and effective gaseous mercury samples for testing the sensor's performance. It offers a detection method that minimizes impurities while accurately eliminating background interference. This application can accurately prepare calibrated gaseous mercury samples without the need for saturated mercury vapor, enabling rapid detection of various parameters such as adsorption performance, measurement accuracy, and repeatability of the micro / nano-based sensor. Through appropriate standard sample selection and online reaction flow control, using an atomic fluorescence spectrometer as a gas concentration control experiment, the sensor's detection performance can be more accurately assessed. Furthermore, it reduces laboratory requirements and minimizes the risk to personnel, significantly reducing the difficulty and danger of experimental testing. This allows testing personnel to work without facing significant risks.

[0048] This application provides a detection system for a micro / nano gaseous mercury sensor, such as... Figure 1 As shown, the system includes: a controller 100, a detection component 200, and a processor 300, wherein the detection component 200 is connected to both the controller 100 and the processor 300; as Figure 2 As shown, the detection assembly 200 includes: a reaction ring 4, a gas-liquid separator, a purifier 8, a mercury sensor 11, and a detector 10;

[0049] The controller 100 is used to control the detection component 200 to generate the first mercury-removing gas;

[0050] The controller 100 is specifically used to: control the introduction of mercury standard solution 1 and reducing agent 2 into the reaction ring 4, where they are mixed and react to generate gaseous mercury and reaction liquid;

[0051] The reaction ring 4 is used to pass the gaseous mercury and the reaction liquid into the gas-liquid separator;

[0052] The gas-liquid separator is used to separate the gaseous mercury and the reaction liquid, and then pass the separated target gaseous mercury into the impurity remover 8.

[0053] The impurity remover 8 is used to remove impurities from the target gaseous mercury using a impurity remover to obtain impurity-removed mercury gas, and then introduces the impurity-removed mercury gas into the mercury sensor 11.

[0054] The mercury sensor 11 is used to detect the concentration of mercury in the purified mercury gas to obtain a first detection concentration;

[0055] The controller 100 is also used to control the secondary generation of mercury-removing gas and to control the introduction of the secondary generation of mercury-removing gas into the detector 10;

[0056] The detector 10 is used to detect the concentration of mercury in the secondary generated mercury-removing gas to obtain a second detection concentration;

[0057] The processor 300 is used to determine the detection performance of the mercury sensor 11 based on the first detection concentration and the second detection concentration.

[0058] In addition, the controller 100 is also used to control the flow rate of argon gas introduced into the reaction and the direction of the reversing valve.

[0059] Optionally, the mercury standard solution 1 is a standard solution containing a defined concentration of mercury, typically prepared by precise weighing, dissolving, and diluting a high-purity mercury compound, resulting in an accurate concentration value. The reducing agent 2 can be a potassium borohydride solution. The detector 10 can be an atomic fluorescence spectrometer.

[0060] Optionally, the principle of using the mercury sensor 11 to detect the concentration of mercury in the purified mercury gas can be as follows: The purified mercury gas enters the gold-mercury enrichment pipe, where the gold material absorbs all the mercury elements in the gas. After absorption is complete and the pipe is purged with argon gas, the introduced argon gas, combined with high-temperature heating of the gold-mercury enrichment pipe, decomposes the mercury atoms absorbed by the gold material. This mercury is then released into the argon gas at once and directly blown onto the gaseous mercury sensor 11, which is manufactured using micro-nano technology. The sensor absorbs mercury, thereby changing a certain physical property of the sensor medium. The concentration of mercury detected by the mercury sensor 11 in the purified mercury gas can then be calculated by detecting the change in this physical property.

[0061] It should be noted that the detector 10 described above is used to detect the concentration of mercury in the secondary-generated mercury-removing gas. The second detection concentration is obtained by the controller 100 controlling the detection component 200 to generate the secondary mercury-removing gas again, and then controlling the secondary-generated mercury-removing gas to be introduced into the detector 10. The detector 10 is used to detect the concentration of mercury in the secondary-generated mercury-removing gas to obtain the second detection concentration.

[0062] Specifically, the controller 100 controls the detection component 200 to generate the mercury-removing gas in a secondary manner as follows:

[0063] The controller 100 is used to control the introduction of mercury standard solution 1 and reducing agent 2 into the reaction ring 4, where they are mixed and react to generate gaseous mercury and reaction liquid; the reaction ring 4 is used to introduce the gaseous mercury and the reaction liquid into the gas-liquid separator; the gas-liquid separator is used to separate the gaseous mercury and the reaction liquid, and then introduce the separated target gaseous mercury into the impurity remover 8; the impurity remover 8 is used to remove impurities from the target gaseous mercury using an impurity remover to obtain impurity-removed mercury gas, and then introduce the impurity-removed mercury gas into the sensor.

[0064] As one possible implementation, such as Figure 2 As shown, the detection component 200 further includes a sample injection peristaltic pump 3, which is connected to the reaction loop 4. The controller 100 is specifically used for:

[0065] After the peristaltic pump 3 absorbs the mercury standard solution 1 and the reducing agent 2, it introduces the mercury standard solution 1 and the reducing agent 2 into the reaction loop 4.

[0066] As another possible implementation, such as Figure 3As shown, the detection component 200 further includes: a first injection pump 13 and a second injection pump 14; the first injection pump 13 is used to absorb the mercury standard solution 1 and then pass the standard sample solution into the reaction loop 4; the second injection pump 14 is used to absorb the reducing agent 2 and then pass the reducing agent 2 into the reaction loop 4.

[0067] In other words, there are two ways for the mercury standard solution 1 and the reducing agent 2 to enter the reaction loop 4. The first way is to control the peristaltic pump 3 to absorb the mercury standard solution 1 and the reducing agent 2, and then introduce the mercury standard solution 1 and the reducing agent 2 into the reaction loop 4. The second way is to control the first injection pump 13 to absorb the mercury standard solution 1, and then introduce the standard sample solution into the reaction loop 4; and control the second injection pump 14 to absorb the reducing agent 2, and then introduce the reducing agent 2 into the reaction loop 4.

[0068] Two solutions are mixed in a 1:1 ratio, and simultaneously propelled by argon gas into the primary gas-liquid separator 6. After the liquid and gas are separated in the primary gas-liquid separator 6, the rising gas is pushed into the secondary gas-liquid separator 7, while the waste liquid is extracted by a peristaltic pump. After the gas passes through the secondary gas-liquid separator 7 again to separate water molecules, it is passed into a purification pipe where impurities in the gas are absorbed by a special purification medium.

[0069] Optionally, the detection component 200 may further include: a first reversing valve and a second reversing valve.

[0070] When the first injection pump 13 absorbs the mercury standard solution 1, the first reversing valve is used to form a passage between the mercury standard solution 1 and the first injection pump 13. When the standard sample solution is introduced into the reaction loop 4, the first reversing valve is used to form a passage between the first injection pump 13 and the reaction loop 4.

[0071] When the second injection pump 14 absorbs the reducing agent 2, the second reversing valve is used to form a passage between the reducing agent 2 and the second injection pump 14. When the reducing agent 2 is introduced into the reaction ring 4, the second reversing valve is used to form a passage between the second injection pump 14 and the reaction ring 4.

[0072] Optionally, the gas-liquid separator includes: a primary gas-liquid separator 6 and a secondary gas-liquid separator 7; the primary gas-liquid separator 6 is used to perform a first gas-liquid separation on the gaseous mercury and the reaction liquid to obtain a first gaseous mercury and a first reaction liquid, and to introduce the first gaseous mercury into the secondary gas-liquid separator 7; the secondary gas-liquid separator 7 is used to perform a second gas-liquid separation on the first gaseous mercury to obtain the target gaseous mercury and the second reaction liquid.

[0073] Optionally, the detection system further includes: a waste liquid peristaltic pump 5, which is connected to the primary gas-liquid separator 6 and the secondary gas-liquid separator 7 respectively;

[0074] The waste liquid peristaltic pump 5 is used to discharge the first reaction liquid and the second reaction liquid.

[0075] Optionally, the detection system further includes: a third reversing valve 9, the first end of which is connected to the impurity remover 8, and the second end of which is connected to the mercury sensor 11 or the detector 10;

[0076] The third reversing valve 9 is used to introduce the mercury-removing gas into the mercury sensor 11 or into the detector 10.

[0077] Optionally, the controller 100 is specifically used for:

[0078] When the first impurity-removing mercury gas is generated, the first end of the third reversing valve 9 is connected to the impurity remover 8, and the second end of the third reversing valve 9 is connected to the mercury sensor 11.

[0079] During the secondary generation of impurity-removing mercury gas, the first end of the third reversing valve 9 is connected to the impurity remover 8, and the second end of the third reversing valve 9 is connected to the detector 10.

[0080] Optionally, the detection assembly 200 further includes a recoverer 12, which is connected to the mercury sensor 11 and the detector 10 respectively;

[0081] The recoverer 12 is used to extract and recover the target gaseous mercury detected by the mercury sensor 11 and the detector 10.

[0082] The detection system of the micro / nano gaseous mercury sensor provided in this application embodiment includes: a controller 100, a detection component 200, and a processor 300. The detection component 200 is connected to the controller 100 and the processor 300, respectively. The detection component 200 includes: a reaction ring 4, a gas-liquid separator, a purifier 8, a mercury sensor 11, and a detector 10. The controller 100 is used to control the detection component 200 to generate purified mercury gas for the first time. Specifically, the controller 100 is used to control the introduction of mercury standard solution 1 and reducing agent 2 into the reaction ring 4, where they are mixed and react to generate gaseous mercury and a reaction liquid. The reaction ring 4 is used to introduce the gaseous mercury and the reaction liquid into the gas-liquid separator. The gas-liquid separator is used for... After separating the gaseous mercury and the reaction liquid, the separated target gaseous mercury is passed into the impurity remover 8. The impurity remover 8 is used to remove impurities from the target gaseous mercury using a removing agent to obtain impurity-removed mercury gas, which is then passed into the mercury sensor 11. The mercury sensor 11 is used to detect the concentration of mercury in the impurity-removed mercury gas to obtain a first detection concentration. The controller 100 is also used to control the secondary generation of impurity-removed mercury gas and control the secondary generation of impurity-removed mercury gas to be passed into the detector 10. The detector 10 is used to detect the concentration of mercury in the secondary generation of impurity-removed mercury gas to obtain a second detection concentration. The processor 300 is used to determine the detection performance of the mercury sensor 11 based on the first and second detection concentrations. The detection system of the micro / nano gaseous mercury sensor provided in this application embodiment can accurately prepare gaseous mercury samples of calibrated concentration without the need to prepare saturated mercury vapor. It can quickly detect various parameters such as the adsorption performance, measurement accuracy, and repeatability of the sensor based on micro / nano fabrication. Furthermore, by reasonably selecting standard samples and controlling the online reaction flow rate, and using the detector 10 of the atomic fluorescence spectrometer as a gas concentration control experiment, the detection performance of the sensor can be more accurately determined.

[0083] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0084] The above embodiments merely illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A detection system for a micro / nano gaseous mercury sensor, characterized in that, The system includes: a controller, a detection component, and a processor, wherein the detection component is connected to the controller and the processor respectively; the detection component includes: a reaction loop, a gas-liquid separator, a filter, a mercury sensor, and a detector; The controller is used to control the detection component to generate the first mercury-removing gas; The controller is specifically used to: control the introduction of mercury standard solution and reducing agent into the reaction ring, where they are mixed and react to generate gaseous mercury and reaction liquid; The reaction ring is used to pass the gaseous mercury and the reaction liquid into the gas-liquid separator; The gas-liquid separator is used to separate the gaseous mercury and the reaction liquid, and then pass the separated target gaseous mercury into the impurity remover. The impurity remover is used to remove impurities from the target gaseous mercury using a impurity remover to obtain impurity-removed mercury gas, and then introduces the impurity-removed mercury gas into the mercury sensor. The mercury sensor is used to detect the concentration of mercury in the purified mercury gas to obtain a first detection concentration; The controller is also used to control the secondary generation of mercury-removing gas and to control the introduction of the secondary generation of mercury-removing gas into the detector; The detector is used to detect the concentration of mercury in the secondary generated mercury-removing gas to obtain a second detection concentration; The processor is used to determine the detection performance of the mercury sensor based on a first detection concentration and a second detection concentration.

2. The system according to claim 1, characterized in that, The detection assembly further includes a sample injection peristaltic pump, which is connected to the reaction loop. The controller is specifically used for: After the peristaltic pump absorbs the mercury standard solution and the reducing agent, the mercury standard solution and the reducing agent are introduced into the reaction loop.

3. The system according to claim 1, characterized in that, The detection component further includes: a first injection pump and a second injection pump; The first syringe pump is used to absorb the mercury standard solution and then pass the standard sample solution into the reaction loop; The second injection pump is used to absorb the reducing agent and then pass the reducing agent into the reaction loop.

4. The system according to claim 3, characterized in that, The detection component further includes: a first reversing valve and a second reversing valve; When the first injection pump absorbs the mercury standard solution, the first reversing valve is used to form a passage between the mercury standard solution and the first injection pump. When the standard sample solution is introduced into the reaction loop, the first reversing valve is used to form a passage between the first injection pump and the reaction loop. When the second injection pump absorbs the reducing agent, the second reversing valve is used to form a passage between the reducing agent and the second injection pump. When the reducing agent is introduced into the reaction ring, the second reversing valve is used to form a passage between the second injection pump and the reaction ring.

5. The system according to claim 1, characterized in that, The gas-liquid separator includes: a primary gas-liquid separator and a secondary gas-liquid separator; The primary gas-liquid separator is used to perform a first gas-liquid separation between the gaseous mercury and the reaction liquid to obtain a first gaseous mercury and a first reaction liquid, and then introduces the first gaseous mercury into the secondary gas-liquid separator. The secondary gas-liquid separator is used to perform a second gas-liquid separation on the first gaseous mercury to obtain the target gaseous mercury and the second reaction liquid.

6. The system according to claim 5, characterized in that, The detection system further includes a waste liquid peristaltic pump, which is connected to the primary gas-liquid separator and the secondary gas-liquid separator respectively. The waste liquid peristaltic pump is used to discharge the first reaction liquid and the second reaction liquid.

7. The system according to claim 1, characterized in that, The detection system further includes: a third reversing valve, the first end of which is connected to the impurity remover, and the second end of which is connected to the mercury sensor or the detector; The third reversing valve is used to introduce the mercury-removing gas into the mercury sensor or into the detector.

8. The system according to claim 7, characterized in that, The controller is specifically used for: When the first impurity-removing mercury gas is generated, the first end of the third reversing valve is connected to the impurity remover, and the second end of the third reversing valve is connected to the mercury sensor. During the secondary generation of impurity-removing mercury gas, the first end of the third reversing valve is connected to the impurity remover, and the second end of the third reversing valve is connected to the detector.

9. The system according to claim 1, characterized in that, The detection assembly also includes a collector, which is connected to the detector; The recovery unit is used to extract and recover the target gaseous mercury detected by the mercury sensor and the detector.

Images