Mass spectrometer sample introduction analysis device and method suitable for primary loop water of nuclear power plant

Abstract

The invention discloses a mass spectrometer sample introduction analysis device and method suitable for primary loop water of a nuclear power plant, the mass spectrometer sample introduction analysis device comprises a device body, a control module, a storage module, an analysis unit and an execution module, the device body is provided with an auxiliary mechanism for cleaning and purging, and the auxiliary mechanism comprises a waste liquid tank, a first control valve and a flowmeter; and a liquid storage tank and a high-pressure metering pump are arranged around the waste liquid tank. By arranging the auxiliary mechanism, parts needing to be washed in the device can be automatically cleaned and purged, the radiation exposure risk of personnel can be reduced, and the situation that secondary potential safety hazards are caused by collision between workers and other equipment can be avoided.

Description

Technical Field

[0001] This invention relates to the field of nuclear power technology, specifically to a mass spectrometer sample introduction and analysis device and method suitable for primary circuit water in nuclear power plants. Background Technology

[0002] The primary circuit water in nuclear power plants serves as the core coolant and moderator of the reactor. Its water quality directly affects core safety, equipment corrosion protection, and neutron reaction efficiency. Mass spectrometers, with their ultra-high detection accuracy, have become the core equipment for analyzing these indicators. Due to the harsh operating conditions of primary circuit water—high temperature and pressure, strong radioactivity, and the presence of special chemical additives—and the fact that mass spectrometers cannot directly analyze liquid samples, specialized mass spectrometer sample introduction and analysis devices are typically used to connect the primary circuit piping to the mass spectrometer. Through precise sampling, stepped operating condition adjustment, purification pretreatment, controlled flash vaporization, targeted component separation, and safe transportation throughout the entire process, while achieving efficient radioactive isolation and protection of sample integrity, the liquid water sample is transformed into gaseous components detectable by the mass spectrometer, providing accurate data support for water quality monitoring and safe operation of nuclear power plants.

[0003] Existing mass spectrometer sample introduction and analysis devices, after being used in the primary circuit water of nuclear power plants, typically require personnel to clean and purge their internal components using tools. This operation necessitates close contact between personnel and various internal parts, increasing the risk of radiation exposure and increasing the likelihood of collisions with other equipment, potentially causing secondary safety hazards. Therefore, there is an urgent need for an improved mass spectrometer sample introduction and analysis device suitable for nuclear power plant primary circuit water to address the aforementioned problems. Summary of the Invention

[0004] This invention provides a mass spectrometer sample introduction and analysis device suitable for primary loop water in nuclear power plants, in order to solve the problems mentioned above.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A mass spectrometer sample introduction and analysis device suitable for primary circuit water in nuclear power plants includes a device body and a control module, a storage module, an analysis unit and an execution module located on the device body. The device body is also provided with an auxiliary mechanism for cleaning and purging. The control module is used to coordinate the collaborative work between various modules. The storage module is used to store key data of the entire detection and analysis process in real time. The analysis unit is used to provide accurate basis for the control module to issue instructions. The analysis unit includes an acquisition module and a data analysis module. The acquisition module is used to acquire raw physical signals related to the droplets in real time and transmit them to the data analysis module. The data analysis module is used to process, analyze and judge the received raw electrical signals. The execution module is used to execute the control instructions output by the control module. The auxiliary mechanism includes a waste liquid tank, a first control valve, and a flow meter. A storage tank and a high-pressure metering pump are arranged around the waste liquid tank. The input and output ends of the high-pressure metering pump and the input end of the first control valve are each equipped with a first delivery pipe. A first check valve is installed between two of the first delivery pipes. A second control valve is arranged around the first control valve. The input and output ends of the flow meter and the input end of the second control valve are each equipped with a first gas delivery pipe. A second check valve is installed between two of the first gas delivery pipes. A second gas delivery pipe is installed at the gas inlet end of the waste liquid tank. A second delivery pipe is installed at the liquid inlet end of the waste liquid tank. The input end of another first delivery pipe is connected to the output end of the storage tank.

[0006] Preferably, the device body includes a cabinet, a controller body is installed on one side of the cabinet, a sampling tube is fixedly inserted through the top of the inner wall of the cabinet, a sampling valve is installed at the output end of the sampling tube, and a cooler, a multi-stage pressure reducing valve, a filter, an ion exchange column, a helium cylinder and a gas chromatography column are installed inside the cabinet.

[0007] Preferably, the cabinet has a door at its opening, a vaporization chamber inside the cabinet, a first connecting pipe at both the input and output ends of the cooler, a second connecting pipe at both the input and output ends of the filter, and a first electric valve at the output end of the ion exchange column.

[0008] Preferably, a directional valve is installed at the output end of the first electric valve, a liquid storage ring is installed at the output end of the directional valve, a flow controller is installed at the output end of the liquid storage ring, a third connecting pipe is installed at both input ends of the vaporization chamber, and a three-way pipe is installed at the output end of the helium cylinder.

[0009] Preferably, a second electric valve is installed at both output ends of the three-way tube, an actuator valve is arranged around the helium cylinder, a fourth connecting tube is installed at the input end, output end and input end of the actuator valve of the gas chromatograph column, a laser particulate sensor is installed at the detection port of one of the fourth connecting tubes, and the input end of one of the fourth connecting tubes is connected to the output end of the vaporization chamber, a third electric valve is installed at each output end of the multi-way tube, and a vacuum transition joint is installed at the output end of one of the third electric valves through a pipeline.

[0010] Preferably, the first connecting pipe is used to connect the sampling valve to the cooler and the cooler to the multi-stage pressure reducing valve, and the second connecting pipe is used to connect the multi-stage pressure reducing valve to the filter and the filter to the ion exchange column.

[0011] Preferably, the third connecting pipe is used to connect the flow controller to the vaporization chamber and the vaporization chamber to one of the second electric valves, the input end of one of the fourth connecting pipes is installed with the output end of the actuator valve, and the output end of the other fourth connecting pipe is installed with a multi-port pipe.

[0012] Preferably, both the waste liquid tank and the storage tank are located inside the cabinet, the high-pressure metering pump is installed inside the cabinet, the output end of the first control valve is installed with one of the input ends of the directional valve, and the output end of the second control valve is installed with the other input end of the directional valve.

[0013] Preferably, the input end of another first gas supply pipe is installed with the output end of another second electric valve, the input end of the second gas supply pipe is installed with the output end of an intermediate third electric valve, and the input end of the second liquid supply pipe is installed with the output end of another third electric valve.

[0014] A method for mass spectrometer sample introduction and analysis device suitable for primary circuit water in nuclear power plants includes the following steps: S1. When the device is in use, a suitable amount of high-temperature and high-pressure water sample is drawn from the primary circuit water of the nuclear power plant through the sampling valve, sampling tube and one of the first connecting pipes, and transported to the interior of the cooler for cooling. Then, through another first connecting pipe, the cooled water sample is transported to the interior of the multi-stage pressure reducing valve for depressurization. Next, through the second connecting pipe and the filter, the depressurized water sample is filtered and transported to the interior of the ion exchange column to remove interfering ions that affect the detection accuracy. Then, through the first electric valve, the directional valve and the liquid storage ring, the water sample is transported to the interior of the flow controller to accurately control the water sample transport flow and maintain it constant. Then, through one of the third connecting pipes, the water sample is transported to the interior of the activated vaporization chamber. At the same time, the helium cylinder will transport the depressurized helium to the interior of the vaporization chamber through the second electric valve, the three-way pipe and another third connecting pipe. S2. The vaporization chamber rapidly and uniformly converts the liquid water sample into a gaseous sample, which is then thoroughly mixed with helium and delivered to one of the fourth connecting tubes. A activated laser particulate sensor then detects the presence of droplets in the gas mixture. If droplets are detected, the controller will not activate the valve to prevent droplets from entering subsequent pipelines. If no droplets are detected, the controller will activate the valve and deliver the gas mixture to the gas chromatography column via the fourth connecting tube. The gas chromatography column then precisely separates the different components of the gas mixture and delivers the separated sample to the mass spectrometer for analysis via a multi-port tube, one of the third electric valves, a pipeline, and a vacuum transition connector. S3. When it is necessary to clean and purge the essential components inside the device body, the cleaning fluid inside the storage tank is delivered to the directional valve for cleaning through the high-pressure metering pump, the first delivery pipe, the first check valve and the first control valve. Then the cleaning fluid will clean the other essential components according to the sample delivery line mentioned above. When the cleaning fluid is delivered to the inside of the multi-port pipe, it is delivered to the inside of the waste liquid tank through the corresponding third electric valve and the second delivery pipe, and then delivered to the nuclear power plant waste liquid equipment through the corresponding pipeline. S4. When the cleaning of the essential components inside the device body is completed and purging is required, the helium cylinder will deliver depressurized helium at a suitable flow rate to the directional valve for purging through the three-way pipe, the second electric valve, the flow meter, the second control valve, the second check valve, and the first gas delivery pipe. At the same time, the helium will purge the remaining essential components according to the sample delivery line mentioned above. When the helium is delivered to the multi-way pipe, the helium inside the multi-way pipe will be delivered to the waste liquid tank through the corresponding third electric valve and the second gas delivery pipe, and then delivered to the waste gas treatment system for treatment through the corresponding pipeline.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by setting up an auxiliary mechanism, can automatically clean and purge the essential components inside the mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants. This not only reduces the risk of radiation exposure to personnel, but also avoids secondary safety hazards caused by collisions between personnel and other equipment. In other words, it improves the performance of the mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants. With the cooperation of the activated high-pressure metering pump, the activated first control valve, the activated first check valve, and the first liquid delivery pipe, the cleaning liquid inside the storage tank can be extracted and delivered to the interior of the directional valve. With the cooperation of the activated second control valve, the activated flow meter, the activated second check valve, and the first gas delivery pipe, helium gas passing through another second electric valve can be delivered to the interior of the directional valve. 2. This invention, by setting up the device body, can convert water samples from the primary loop of a nuclear power plant into gaseous components that can be detected by a mass spectrometer, providing accurate data support for water quality monitoring and safe operation of nuclear power plants. With the cooperation of the activated sampling valve, sampling tube and one of the first connecting pipes, the water sample can be transported into the interior of the cooler. With the cooperation of one of the activated second electric valves, a three-way pipe and another third connecting pipe, the helium gas inside the helium cylinder can be transported into the interior of the vaporization chamber. Attached Figure Description

[0016] Figure 1 This is a partial perspective view of a mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants, according to the present invention. Figure 2This is a perspective view of a mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants, according to the present invention. Figure 3 This is a partial perspective view of a mass spectrometer sample introduction and analysis device for primary circuit water in a nuclear power plant, according to the present invention. Figure 4 This is a partial structural schematic diagram of a mass spectrometer sample introduction and analysis device for primary loop water in a nuclear power plant, according to the present invention. Figure 5 This is a schematic diagram of the main body of a mass spectrometer sample introduction and analysis device for primary loop water in a nuclear power plant, according to the present invention. Figure 6 This is a schematic diagram of another part of the structure of a mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to the present invention; Figure 7 This is a perspective view of the main body of a mass spectrometer sample introduction and analysis device for primary loop water in a nuclear power plant, according to the present invention. Figure 8 This is a partial perspective view of a mass spectrometer sample introduction and analysis device for primary circuit water in a nuclear power plant, according to the present invention. Figure 9 This is a system diagram of a mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants, according to the present invention.

[0017] In the diagram: 1. Device body; 101. Cabinet; 102. Controller body; 103. Sampling tube; 104. Sampling valve; 105. Cooler; 106. Multistage pressure reducing valve; 107. Filter; 108. Ion exchange column; 109. Directional valve; 110. Liquid storage ring; 111. First connecting pipe; 112. Second connecting pipe; 113. First electric valve; 114. Flow controller; 115. Vaporization chamber; 116. Third connecting pipe; 117. Helium cylinder; 118. Gas chromatograph column; 119. Fourth connecting pipe; 120. T-connector; 121. Second electric valve; 122. Multi-port pipe; 123. ... 1. Three electric valves; 124. Vacuum transition joint; 125. Cabinet door; 126. Actuating valve; 127. Laser particulate sensor; 2. Auxiliary mechanism; 201. Waste liquid tank; 202. Storage tank; 203. High-pressure metering pump; 204. First control valve; 205. First infusion pipe; 206. First check valve; 207. Second control valve; 208. Second check valve; 209. Flow meter; 210. First gas infusion pipe; 211. Second gas infusion pipe; 212. Second infusion pipe; 3. Control module; 4. Storage module; 5. Analysis unit; 501. Data acquisition module; 502. Data analysis module; 6. Execution module. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1: Please refer to Figures 1-9 As shown, the present invention provides a mass spectrometer sample introduction and analysis device suitable for primary loop water in nuclear power plants, including a device body 1, a control module 3, a storage module 4, an analysis unit 5, and an execution module 6.

[0020] The device body 1 includes a cabinet 101. A controller body 102 is installed on one side of the cabinet 101. A sampling tube 103 is fixedly inserted through the top of the inner wall of the cabinet 101. A sampling valve 104 is installed at the output end of the sampling tube 103. A cooler 105, a multi-stage pressure reducing valve 106, a filter 107, an ion exchange column 108, a helium cylinder 117, and a gas chromatography column 118 are installed inside the cabinet 101. A cabinet door 125 is provided at the opening of the cabinet 101. A vaporization chamber 115 is provided inside the cabinet 101. A first connecting pipe 111 is installed at both the input and output ends of the cooler 105. A second connecting pipe 112 is installed at both the input and output ends of the filter 107. The ion exchange column 108... A first electric valve 113 is installed at the output end. A directional valve 109 is installed at the output end of the first electric valve 113. A liquid storage ring 110 is installed at the output end of the directional valve 109. A flow controller 114 is installed at the output end of the liquid storage ring 110. A third connecting pipe 116 is installed at both input ends of the vaporization chamber 115. A three-way pipe 120 is installed at the output end of the helium cylinder 117. A second electric valve 121 is installed at both output ends of the three-way pipe 120. An actuator valve 126 is arranged around the helium cylinder 117. A fourth connecting pipe 119 is installed at the input end, output end of the gas chromatograph column 118, and input end of the actuator valve 126. A laser particle is installed at the detection port of one of the fourth connecting pipes 119. A material sensor 127 is included, with one of the fourth connecting pipes 119 having its input end connected to the output end of the vaporization chamber 115. Each output end of the multi-port pipe 122 is equipped with a third electric valve 123, and one of the third electric valves 123 has a vacuum transition connector 124 connected to its output end via a pipe. A first connecting pipe 111 connects the sampling valve 104 to the cooler 105, and the cooler 105 to the multi-stage pressure reducing valve 106. A second connecting pipe 112 connects the multi-stage pressure reducing valve 106 to the filter 107, and the filter 107 to the ion exchange column 108. A third connecting pipe 116 connects the flow controller 114 to the vaporization chamber 115, and the vaporization chamber 115 to... One of the second electric valves 121 is connected, with the input end of a fourth connecting pipe 119 installed at the output end of the actuator valve 126, and the output end of another fourth connecting pipe 119 is installed with a multi-port pipe 122. The control module 3 is used to coordinate the collaborative work between the modules, the storage module 4 is used to store key data of the entire detection and analysis process in real time, the analysis unit 5 is used to provide accurate basis for the control module 3 to issue instructions, the acquisition module 501 is used to acquire raw physical signals related to the droplets in real time and transmit them to the data analysis module 502, the data analysis module 502 is used to process, analyze and judge the received raw electrical signals, and the execution module 6 is used to execute the control commands output by the control module 3.

[0021] In this embodiment, when the device body 1 is in use, the sampling valve 104 is activated by the controller body 102. The activated controller body 102 then draws a suitable amount of high-temperature, high-pressure water sample from the primary circuit water of the nuclear power plant through the sampling pipe 103 and one of the first connecting pipes 111, and transports it to the interior of the cooler 105 for cooling. Subsequently, through another first connecting pipe 111, the cooled water sample is transported to the interior of the multi-stage pressure reducing valve 106 for pressure reduction. Then, through one of the second connecting pipes 112, the pressure-reduced water sample is transported to the interior of the filter 107 for filtration. Finally, through another second connecting pipe 112, the filtered water sample is transported to… Inside the ion exchange column 108, interfering ions that affect detection accuracy are removed to ensure the accuracy of subsequent detection data. Then, through the activated first electric valve 113, directional valve 109, and reservoir ring 110, the water sample with removed interfering ions is delivered to the flow controller 114 to precisely control and maintain a constant flow rate of the water sample, providing a stable sample supply for subsequent detection and avoiding flow fluctuations that could affect detection accuracy. Next, through one of the third connecting pipes 116, the water sample is delivered to the activated vaporization chamber 115. At the same time, the controller body 102 directly activates one of the second electric valves 121. The depressurized helium gas inside the helium cylinder 117 is delivered to the vaporization chamber 115 via a three-way pipe 120 and another third connecting pipe 116. The activated vaporization chamber 115 rapidly and uniformly converts the liquid water sample into a gaseous sample, thoroughly mixing it with the helium gas to create the necessary conditions for subsequent detection. The vaporization chamber 115 then delivers the mixed gas to one of the fourth connecting pipes 119. The activated laser particulate sensor 127 then detects the mixed gas inside the fourth connecting pipe 119 to check for droplets and transmits the detection results to the controller body 102. When the fourth connecting pipe 119 is detected... When there are droplets in the mixed gas, the controller body 102 will not activate the execution valve 126 to prevent droplets from entering the subsequent pipeline and causing damage to subsequent components. When it is detected that there are no droplets in the mixed gas inside the fourth connecting pipe 119, the controller body 102 will activate the execution valve 126 and deliver the mixed gas to the inside of the gas chromatography column 118 through the middle fourth connecting pipe 119. The gas chromatography column 118 will accurately separate the different components of the mixed gas and deliver the separated sample to the inside of the mass spectrometer for detection through the multi-port pipe 122, one of the activated third electric valves 123, the pipeline and the vacuum transition joint 124.

[0022] When the device body 1 is in use, the acquisition module 501 will capture the laser scattering signal in real time and transmit it to the data analysis module 502 and the storage module 4. Then, the data analysis module 502 will compare the signal with the preset threshold to determine whether there are droplets in the mixed gas. At the same time, the analysis results will be transmitted to the control module 3 and the storage module 4. At this time, the storage module 4 will record the original signal and the judgment result for traceability. The control module 3 will issue instructions to the execution module 6 according to the analysis results. When there are no droplets in the mixed gas, the control module 3 will allow the gaseous sample to continue to be transported. When there are droplets in the mixed gas, the control module 3 will cut off the subsequent path and trigger an alarm, realizing the fully automated closed-loop control of the entire process.

[0023] Example 2: According to Figures 1-8 As shown, the device body 1 is equipped with an auxiliary mechanism 2 for cleaning and purging. The auxiliary mechanism 2 includes a waste liquid tank 201, a first control valve 204, and a flow meter 209. A storage tank 202 and a high-pressure metering pump 203 are arranged around the waste liquid tank 201. The input and output ends of the high-pressure metering pump 203 and the input end of the first control valve 204 are each equipped with a first delivery pipe 205. A first check valve 206 is installed between the two first delivery pipes 205. A second control valve 207 is arranged around the first control valve 204. The input and output ends of the flow meter 209 and the input end of the second control valve 207 are each equipped with a first air delivery pipe 210. A second check valve 208 is installed between the two first air delivery pipes 210. A second air delivery pipe 21 is installed at the air inlet end of the waste liquid tank 201. 1. A second inlet pipe 212 is installed at the inlet end of the waste liquid tank 201. The inlet end of another first inlet pipe 205 is connected to the outlet end of the storage tank 202. Both the waste liquid tank 201 and the storage tank 202 are located inside the cabinet 101. The high-pressure metering pump 203 is installed inside the cabinet 101. The outlet end of the first control valve 204 is connected to one of the inlets of the directional valve 109. The outlet end of the second control valve 207 is connected to the other inlet end of the directional valve 109. The inlet end of another first gas pipe 210 is connected to the outlet end of another second electric valve 121. The inlet end of the second gas pipe 211 is connected to the outlet end of a third electric valve 123. The inlet end of the second inlet pipe 212 is connected to the outlet end of another third electric valve 123.

[0024] In this embodiment, when it is necessary to clean and purge the essential components inside the device body 1, the high-pressure metering pump 203, the first control valve 204, and another third electric valve 123 are activated via the controller body 102. The activated high-pressure metering pump 203 draws the cleaning fluid from the storage tank 202 through the first infusion pipe 205, the first check valve 206, and the activated first control valve 204, and delivers it to the directional valve 109 to clean its interior. Subsequently, the cleaning fluid follows the sample delivery route to clean the remaining essential components. When the cleaning fluid reaches the multi-port pipe 122, it is delivered through the activated third electric valve 123 and the second infusion pipe 212 to the waste liquid tank 201, and then through corresponding pipelines to the nuclear power plant waste liquid equipment. When the essential components inside the device body 1 are cleaned... When cleaning is required and purging is necessary, the controller body 102 activates another second electric valve 121, flow meter 209, second control valve 207, and a third electric valve 123. At this time, the helium cylinder 117 will deliver depressurized helium at a suitable flow rate to the directional valve 109 through the three-way pipe 120, the activated second electric valve 121, the activated flow meter 209, the activated second control valve 207, the second check valve 208, and the first gas delivery pipe 210 to purge the inside of the directional valve 109. At the same time, the helium will purge the other components that must be cleaned according to the above sample delivery line. When the helium is delivered to the multi-way pipe 122, the helium inside the multi-way pipe 122 will be delivered to the waste liquid tank 201 through the activated third electric valve 123 and the second gas delivery pipe 211, and then delivered to the waste gas treatment system for treatment through the corresponding pipeline.

[0025] In this invention, before use, the cabinet door 125 is opened, and the radioactive detector is fixed to the outer wall of the downstream pipe of the cooler 105 by the bracket and electrically connected to the controller body 102 to monitor the radioactivity of the water sample and avoid damage to subsequent components due to excessive radioactivity. Then, the gas inlet of the mass spectrometer is connected to the output of the vacuum transition connector 124. Next, the gas outlet of the waste liquid tank 201 is connected to the waste gas treatment system through pipelines, and the liquid outlet of the waste liquid tank 201 is connected to the waste liquid equipment of the nuclear power plant.

[0026] In operation, the sampling valve 104 is activated via the controller body 102. The activated controller body 102 then draws a suitable amount of high-temperature, high-pressure water sample from the primary circuit water of the nuclear power plant through the sampling pipe 103 and one of the first connecting pipes 111, and delivers it to the cooler 105 for cooling. Subsequently, through another first connecting pipe 111, the cooled water sample is delivered to the multi-stage pressure reducing valve 106 for pressure reduction. Then, through one of the second connecting pipes 112, the depressurized water sample is delivered to the filter 107 for filtration. Finally, through another second connecting pipe 112, the filtered water sample is delivered to the ion exchange column 108. The water sample is then transported to the flow controller 114 via the activated first electric valve 113, directional valve 109, and reservoir ring 110 to precisely control and maintain a constant flow rate, providing a stable sample supply for subsequent detections and preventing flow fluctuations from affecting detection accuracy. The water sample is then transported to the activated vaporization chamber 115 via one of the third connecting pipes 116. Simultaneously, the controller body 102 directly activates one of the second electric valves 121, which then connects to the three-way valve. Pipe 120 and another third connecting pipe 116 deliver depressurized helium gas from helium cylinder 117 to vaporization chamber 115. The activated vaporization chamber 115 rapidly and uniformly converts the liquid water sample into a gaseous sample, thoroughly mixing it with helium to create preconditions for subsequent detection. Then, vaporization chamber 115 delivers the mixed gas to one of the fourth connecting pipes 119. The activated laser particulate sensor 127 then detects the mixed gas inside the fourth connecting pipe 119 to check for droplets and transmits the detection results to the controller body 102. When the mixed gas inside the fourth connecting pipe 119 is detected... When there are droplets in the mixed gas, the controller body 102 will not activate the execution valve 126 to prevent droplets from entering the subsequent pipeline and causing damage to subsequent components. When it is detected that there are no droplets in the mixed gas inside the fourth connecting pipe 119, the controller body 102 will activate the execution valve 126 and deliver the mixed gas to the inside of the gas chromatography column 118 through the middle fourth connecting pipe 119. The gas chromatography column 118 will accurately separate the different components of the mixed gas and deliver the separated sample to the inside of the mass spectrometer for detection through the multi-port pipe 122, one of the activated third electric valves 123, the pipeline and the vacuum transition joint 124.

[0027] After use, when it is necessary to clean and purge the essential components inside the device body 1, the high-pressure metering pump 203, the first control valve 204, and another third electric valve 123 are activated via the controller body 102. The activated high-pressure metering pump 203 draws the cleaning fluid from the storage tank 202 through the first inlet pipe 205, the first check valve 206, and the activated first control valve 204, and delivers it to the directional valve 109 for cleaning. Subsequently, the cleaning fluid will clean the remaining essential components according to the sample delivery route described above. When the cleaning fluid reaches the multi-port pipe 122, it will be delivered through the activated third electric valve 123 and the second inlet pipe 212 to the waste liquid tank 201, and then through corresponding pipelines to the nuclear power plant waste liquid equipment. Once the essential components inside the device body 1 have been cleaned... When cleaning requires purging, the controller body 102 activates another second electric valve 121, flow meter 209, second control valve 207, and a third electric valve 123. At this time, the helium cylinder 117 will deliver depressurized helium at a suitable flow rate to the directional valve 109 through the three-way pipe 120, the activated second electric valve 121, the activated flow meter 209, the activated second control valve 207, the second check valve 208, and the first gas delivery pipe 210 to purge the inside of the directional valve 109. At the same time, the helium will purge the other components that must be cleaned according to the above sample delivery line. When the helium is delivered to the multi-way pipe 122, the helium inside the multi-way pipe 122 will be delivered to the waste liquid tank 201 through the activated third electric valve 123 and the second gas delivery pipe 211, and then delivered to the waste gas treatment system for treatment through the corresponding pipeline.

[0028] When the device body 1 is in use, the acquisition module 501 will capture the laser scattering signal in real time and transmit it to the data analysis module 502 and the storage module 4. Then, the data analysis module 502 will compare the signal with the preset threshold to determine whether there are droplets in the mixed gas. At the same time, the analysis results will be transmitted to the control module 3 and the storage module 4. At this time, the storage module 4 will record the original signal and the judgment result for traceability. The control module 3 will issue instructions to the execution module 6 according to the analysis results. When there are no droplets in the mixed gas, the control module 3 will allow the gaseous sample to continue to be transported. When there are droplets in the mixed gas, the control module 3 will cut off the subsequent path and trigger an alarm, realizing the fully automated closed-loop control of the entire process.

[0029] The wiring diagrams for the controller body 102, sampling valve 104, first electric valve 113, flow controller 114, vaporization chamber 115, second electric valve 121, third electric valve 123, actuator valve 126, laser particulate sensor 127, high-pressure metering pump 203, first control valve 204, second control valve 207, and flow meter 209 in this invention are common knowledge in the field, and their working principles are well-known technologies. The appropriate model is selected according to actual use. Therefore, the control methods and wiring arrangements for the controller body 102, sampling valve 104, first electric valve 113, flow controller 114, vaporization chamber 115, second electric valve 121, third electric valve 123, high-pressure metering pump 203, first control valve 204, second control valve 207, and flow meter 209 will not be explained in detail.

[0030] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A mass spectrometer sample introduction and analysis device suitable for primary loop water in nuclear power plants, comprising a device body (1) and a control module (3), a storage module (4), an analysis unit (5), and an execution module (6) disposed on the device body, characterized in that: The device body (1) is provided with an auxiliary mechanism (2) for cleaning and blowing. The control module (3) is used to coordinate the collaborative work between the modules. The storage module (4) is used to store key data of the entire detection and analysis process in real time. The analysis unit (5) is used to provide accurate basis for the control module (3) to issue instructions. The analysis unit (5) includes an acquisition module (501) and a data analysis module (502). The acquisition module (501) is used to acquire the original physical signals related to the droplets in real time and transmit them to the data analysis module (502). The data analysis module (502) is used to process, analyze and judge the received original electrical signals. The execution module (6) is used to execute the control instructions output by the control module (3). The auxiliary mechanism (2) includes a waste liquid tank (201), a first control valve (204), and a flow meter (209). A storage tank (202) and a high-pressure metering pump (203) are arranged around the waste liquid tank (201). The input and output ends of the high-pressure metering pump (203) and the input end of the first control valve (204) are both equipped with first delivery pipes (205). A first check valve (206) is installed between the two first delivery pipes (205). A second control valve is arranged around the first control valve (204). The valve (207), the input and output ends of the flow meter (209) and the input end of the second control valve (207) are all equipped with first gas supply pipes (210), wherein a second one-way valve (208) is installed between the two first gas supply pipes (210), the air inlet end of the waste liquid tank (201) is equipped with a second gas supply pipe (211), the liquid inlet end of the waste liquid tank (201) is equipped with a second liquid supply pipe (212), and the input end of another first liquid supply pipe (205) is connected to the output end of the storage tank (202).

2. The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to claim 1, characterized in that: The device body (1) includes a cabinet (101), a controller body (102) is installed on one side of the cabinet (101), a sampling tube (103) is fixedly inserted through the top of the inner wall of the cabinet (101), a sampling valve (104) is installed at the output end of the sampling tube (103), and a cooler (105), a multi-stage pressure reducing valve (106), a filter (107), an ion exchange column (108), a helium cylinder (117) and a gas chromatography column (118) are installed inside the cabinet (101).

3. The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to claim 2, characterized in that: The cabinet (101) has a cabinet door (125) at its opening. The cabinet (101) has a vaporization chamber (115) inside. The cooler (105) has a first connecting pipe (111) installed at both its input and output ends. The filter (107) has a second connecting pipe (112) installed at both its input and output ends. The ion exchange column (108) has a first electric valve (113) installed at its output end.

4. The mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants according to claim 3, characterized in that: The output end of the first electric valve (113) is equipped with a directional valve (109), the output end of the directional valve (109) is equipped with a liquid storage ring (110), the output end of the liquid storage ring (110) is equipped with a flow controller (114), the two input ends of the vaporization chamber (115) are each equipped with a third connecting pipe (116), and the output end of the helium cylinder (117) is equipped with a three-way pipe (120).

5. The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to claim 3, characterized in that: The first connecting pipe (111) is used to connect the sampling valve (104) to the cooler (105) and the cooler (105) to the multi-stage pressure reducing valve (106). The second connecting pipe (112) is used to connect the multi-stage pressure reducing valve (106) to the filter (107) and the filter (107) to the ion exchange column (108).

6. The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to claim 4, characterized in that: The two output ends of the three-way pipe (120) are each equipped with a second electric valve (121). An actuator valve (126) is arranged around the helium cylinder (117). The input end, output end and input end of the gas chromatograph column (118) and the input end of the actuator valve (126) are each equipped with a fourth connecting pipe (119). A laser particulate sensor (127) is installed at the detection port of one of the fourth connecting pipes (119). The input end of one of the fourth connecting pipes (119) is connected to the output end of the vaporization chamber (115). Each output end of the multi-way pipe (122) is equipped with a third electric valve (123). The output end of one of the third electric valves (123) is connected to a vacuum transition joint (124) through a pipe.

7. The mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants according to claim 6, characterized in that: The third connecting pipe (116) is used to connect the flow controller (114) to the vaporization chamber (115) and the vaporization chamber (115) to one of the second electric valves (121). The input end of one of the fourth connecting pipes (119) is installed with the output end of the actuator valve (126), and the output end of the other fourth connecting pipe (119) is installed with a multi-port pipe (122).

8. The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants according to claim 6, characterized in that: The waste liquid tank (201) and the storage tank (202) are both located inside the cabinet (101). The high-pressure metering pump (203) is installed inside the cabinet (101). The output end of the first control valve (204) is installed with one of the input ends of the directional valve (109). The output end of the second control valve (207) is installed with the other input end of the directional valve (109).

9. The mass spectrometer sample introduction and analysis device for primary circuit water in nuclear power plants according to any one of claims 6 to 8, characterized in that: The input end of another first gas supply pipe (210) is connected to the output end of another second electric valve (121), the input end of the second gas supply pipe (211) is connected to the output end of an intermediate third electric valve (123), and the input end of the second liquid supply pipe (212) is connected to the output end of another third electric valve (123).

10. A method for mass spectrometer sample introduction and analysis of primary circuit water in nuclear power plants, characterized in that, The mass spectrometer sample introduction and analysis device for primary loop water in nuclear power plants as described in claim 9 includes the following steps: S1. When the device body (1) is in use, a suitable amount of high-temperature and high-pressure water sample is drawn from the primary circuit water of the nuclear power plant through the sampling valve (104), sampling tube (103) and one of the first connecting tubes (111), and transported to the interior of the cooler (105) for cooling. Then, through another first connecting tube (111), the cooled water sample is transported to the interior of the multi-stage pressure reducing valve (106) for pressure reduction. Then, through the second connecting tube (112) and filter (107), the depressurized water sample is filtered and transported to the interior of the ion exchange column (108) for further treatment. Except for interfering ions that affect detection accuracy, the water sample is then transported to the inside of the flow controller (114) through the first electric valve (113), the directional valve (109) and the liquid storage ring (110) to accurately control the water sample's transport flow rate and maintain it constant. Then, the water sample is transported to the inside of the activated vaporization chamber (115) through one of the third connecting pipes (116). At the same time, the helium cylinder (117) will transport the depressurized helium to the inside of the vaporization chamber (115) through the second electric valve (121), the three-way pipe (120) and another third connecting pipe (116). S2, the vaporization chamber (115) will quickly and uniformly convert the liquid water sample into a gaseous sample and mix it thoroughly with helium. Then, it will be transported to the interior of one of the fourth connecting tubes (119). After that, the laser particulate sensor (127) will detect the mixed gas inside to detect whether there are droplets in the mixed gas. When droplets are detected in the mixed gas, the controller body (102) will not start the execution valve (126) to prevent droplets from entering the subsequent pipeline. When no droplets are detected in the mixed gas, the controller body (102) will start the execution valve (126) and transport the mixed gas to the interior of the gas chromatography column (118) through the middle fourth connecting tube (119). Subsequently, the gas chromatography column (118) will accurately separate the different components of the mixed gas and transport the separated sample to the interior of the mass spectrometer for detection through the multi-port tube (122), one of the third electric valves (123), the pipeline and the vacuum transition joint (124). S3. When it is necessary to clean and purge the components inside the main body (1) of the device, the cleaning fluid inside the storage tank (202) is transported to the directional valve (109) for cleaning through the high-pressure metering pump (203), the first infusion pipe (205), the first check valve (206) and the first control valve (204). Then the cleaning fluid will clean the remaining components according to the sample delivery line. When the cleaning fluid is delivered to the inside of the multi-port pipe (122), it is transported to the inside of the waste liquid tank (201) through the corresponding third electric valve (123) and the second infusion pipe (212), and then transported to the nuclear power plant waste liquid equipment through the corresponding pipeline. S4. When the cleaning of the essential components inside the device body (1) is completed and purging is required, the helium cylinder (117) will deliver the depressurized helium at a suitable flow rate to the inside of the directional valve (109) for purging operation through the three-way pipe (120), the second electric valve (121), the flow meter (209), the second control valve (207), the second check valve (208), and the first gas delivery pipe (210). At the same time, the helium will purge the remaining essential components according to the above sample delivery line. When the helium is delivered to the inside of the multi-way pipe (122), the helium inside the multi-way pipe (122) will be delivered to the inside of the waste liquid tank (201) through the corresponding third electric valve (123) and the second gas delivery pipe (211), and then delivered to the waste gas treatment system for treatment through the corresponding pipeline.

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