An aerosol continuous monitoring device and a monitoring method for acid-proof iodine-129

Abstract

The present invention belongs to the technical field of aerosol monitoring, and particularly relates to an aerosol continuous monitoring device and a monitoring method for acid-proof iodine-129, including a body. An air ventilation component is arranged in the inner cavity of the body, an exhaust component is arranged on the body, a monitoring component is arranged inside the body, and a cleaning component is arranged inside the monitoring component; The air ventilation component includes a pipeline component arranged in the body, and a lane-changing component is arranged inside the pipeline component; The monitoring component includes a driving component arranged in the body, and a solution component is arranged inside the body; The cleaning component includes a flushing component arranged in the body, and a liquid discharge component is arranged at the bottom of the solution component. This invention can continuously monitor different monitoring samples, and after the solution monitoring, perform reverse cleaning on the filter medium, the solution storage part, and the gas sample to avoid affecting the accuracy of subsequent monitoring.

Description

Technical Field

[0001] The present invention belongs to the technical field of aerosol monitoring, and particularly relates to an aerosol continuous monitoring device and a monitoring method for acid-proof iodine-129. Background Art

[0002] During the operation of nuclear power plants, the monitoring of aerosols is of extremely important significance. The radioactive aerosols that may be generated in nuclear power plants not only pose a threat to the health of workers, but also may cause long-term radioactive pollution to the environment.

[0003] However, in the existing nuclear power plant aerosol monitoring technologies, there are generally some challenges. First of all, due to the complexity and diversity of aerosols in nuclear power plants, aerosols from different sources may have different physical, chemical, and radioactive characteristics, which brings great difficulties to continuous monitoring.

[0004] Secondly, during the long-term continuous monitoring process, samples from the previous monitoring may remain in the airway. These residual samples will not only affect the accuracy of the next monitoring, but may also damage the monitoring equipment.

[0005] Moreover, the burnup of the spent fuel in the nuclear power plant reactor is deep, and the fission yield of radioactive iodine is high. Among them, 129 The half-life of 7 I is 1.57×10 129 years, which poses a long-term hazard to the human body and the environment. Therefore, it is necessary to monitor the 85 radioactivity of 129 I. However, since the activity of 6 Kr in the fission gas is 10 129 orders of magnitude higher than that of 85 I, when monitoring the radioactivity of Summary of the Invention

[0006] The purpose of the present invention is to provide an aerosol continuous monitoring device and a monitoring method for acid-proof iodine-129, which can continuously monitor different monitoring samples, and after the solution monitoring, perform reverse cleaning on the filter medium, the solution storage part, and the gas sample to avoid affecting the accuracy of subsequent monitoring, and can accurately monitor acid-proof iodine-129 by using the aerosol continuous monitoring device.

[0007] The technical solutions adopted by the present invention are specifically as follows:

[0008] An aerosol continuous monitoring device includes a body. A ventilation component is arranged in the inner cavity of the body. An exhaust component is fixedly connected to the top of the body. A monitoring component is arranged in the middle of the inner cavity of the body, and a cleaning component is arranged in the monitoring component;

[0009] Ventilation assembly, the ventilation assembly includes a pipe assembly fixedly connected to the inner cavity of the machine body, and a lane-changing assembly is arranged in the inner cavity of the pipe assembly;

[0010] Monitoring assembly, the monitoring assembly includes a driving assembly arranged in the inner cavity of the machine body, and a solution assembly is arranged in the inner cavity of the machine body;

[0011] Cleaning assembly, the cleaning assembly includes a flushing assembly arranged in the inner cavity of the machine body, and a liquid discharge assembly is arranged at the bottom of the solution assembly;

[0012] Among them, when the aerosol gas sample contacts the driving assembly through the pipe assembly, the driving assembly filters out aerosol particles and dissolves the particles through the solution assembly for monitoring;

[0013] When the sample monitoring is completed, the flushing assembly flushes the residual sample in the solution assembly and discharges it through the liquid discharge assembly. The lane-changing assembly rotates along the inner cavity of the pipe assembly, switches the path of the inner cavity of the pipe assembly, and blows air reversely to the pipe assembly to drive the residual sample in the pipe assembly into the exhaust assembly.

[0014] In a preferred solution, the pipe assembly includes a sample tube fixedly connected to the inner cavity of the machine body. An air inlet is opened on the left side of the top of the sample tube, and an air supply pipe is communicated on the right side of the top. An exhaust pipe is opened at the top of the bottom end of the sample tube, and a blowing pipe is opened at the bottom of the bottom end. An air pump is fixedly connected to the bottom right side of the machine body, and the top outlet of the air pump is communicated with the blowing pipe.

[0015] In a preferred solution, the lane-changing assembly includes a first ball core rotatably connected to the top of the sample tube. A first motor is fixedly connected to the top of the sample tube, and the output shaft of the first motor is fixedly connected to the top of the first ball core. A second ball core is rotatably connected to the bottom of the sample tube, and a second motor is fixedly connected to the right side of the bottom of the sample tube. The output shaft of the second motor is fixedly connected to the right end of the second ball core.

[0016] In a preferred solution, the exhaust assembly includes a filter box fixedly connected to the top of the machine body. A plurality of filter plates are movably inserted into the inner cavity of the filter box. A slot is opened at the top of the filter box. A plug is slidably connected to the inner cavity of the filter plate. A pull rope is fixedly connected to one side of the inner cavity of the filter plate where the plug is located. The pull rope is movably sleeved in the filter plate, and the top end of the pull rope extends out of the filter plate. A spring is fixedly connected to the inner cavity of the filter plate, and the other end of the spring is fixedly connected to the plug.

[0017] In a preferred solution, the driving assembly includes a third motor fixedly connected to the inner cavity of the machine body. A rotating frame is fixedly connected to the output shaft of the third motor, and a filtering medium is fixedly connected to the inner cavity of the rotating frame.

[0018] In a preferred embodiment, the solution assembly includes a solution chamber opened in the inner cavity of the machine body. A solution tank is fixedly connected to the bottom of the rear side of the machine body. A first liquid pump is fixedly connected to the top of the solution tank. The inlet of the first liquid pump is communicated with the solution tank. The outlet of the first liquid pump is communicated with a liquid delivery pipe. The outlet of the liquid delivery pipe is communicated with a liquid spraying plate. The outlet of the liquid spraying plate is in contact connection with the filter medium.

[0019] In a preferred embodiment, the flushing assembly includes a second liquid pump fixedly connected to the rear side of the machine body. The outlet of the second liquid pump is communicated with a water distribution pipe. The outlet of the water distribution pipe is connected with multiple groups of upper flushing plates and lower flushing plates. The bottom outlets of the upper flushing plates are all arranged at the top of the inner cavity of the solution chamber. The bottom outlets of the lower flushing plates are arranged on the right side of the filter medium located at the front side of the machine body.

[0020] In a preferred embodiment, the liquid discharge assembly includes a liquid discharge pipe communicated with the bottom of the inner cavity of the solution chamber. The bottom outlet of the liquid discharge pipe extends out of the rear side of the machine body and is communicated with a collecting pipe.

[0021] In a preferred embodiment, three metal rings are annularly arranged on the outer ring of the rotating frame, and the filter media are all arranged within the three metal rings. Among them, the filter medium located above extends into the sample tube. The filter medium located at the front side is in contact with the lower flushing plate, and the filter medium located at the rear side is in contact with the liquid spraying plate. And the machine body is also provided with an empty slot in the area on the left side of the lower flushing plate. The liquid discharge pipe is also communicated with the bottom of the empty slot.

[0022] In a preferred embodiment, a monitoring method for acid-proof iodine-129 is characterized in that: the above aerosol continuous monitoring device is used for monitoring acid-proof iodine-129, including:

[0023] S1: Prepare the whole continuous monitor in advance. The whole continuous monitor is composed of 2 sets of the above aerosol continuous monitoring devices, 1 in-situ processing and display unit, 1 acid-proof pump, 1 electrical box, 1 flowmeter, 2 differential pressure gauges, and 1 set of equipment racks;

[0024] S2: Pump the gas to be measured containing Kr-85 and I-129 nuclides in the processing process pipeline into the filter valve. The filter valve filters the radioactive aerosol and impurity clusters in the gas to be measured. The mixed gas after being processed by the filter valve enters the first aerosol continuous monitoring device;

[0025] S3: Monitor I-129 in the aerosol continuous monitoring device 1. Therefore, the measurement value uploaded to the on-site processing box is the mixed count value of the region of interest, that is, the Compton plateau of Kr-85 and the mixed count value of I-129 in the region of interest. The data form is channel address - count. When the mixed gas enters the aerosol continuous monitoring device 2 through the aerosol continuous monitoring device 1, the measurement value of the aerosol continuous monitoring device 2 is the count of the Compton plateau of Kr-85 in the region of interest;

[0026] S4: The processing box queries the real-time CPS values from the two aerosol continuous monitoring devices, denoted as CPS1 and CPS2, and calculates their differential count n. After the gas passes through the aerosol continuous monitoring device, the original electrical signal is filtered and amplified by the operational amplifier circuit board and transmitted to the ADC, and digital signals are formed through analog-to-digital conversion;

[0027] S5: The on-site processing and display unit is used to perform data calculation, data analysis, display on the uploaded data, and perform alarm and status judgment according to the alarm threshold, and at the same time control the start and stop of the pump.

[0028] The technical effects achieved by the present invention are as follows:

[0029] The driving component and the solution component of the present invention can continuously monitor different monitoring samples. During monitoring, the sample contacts the filtering part of the driving component through the pipeline component, and the appropriate particles are blocked on the filtering part. Then, the driving part of the driving component drives the filtering part to rotate, and the filtering part in contact with the sample is driven to contact the solution component. Subsequently, the solution component sprays the solution to precipitate the particles on the filtering part for monitoring to obtain data. Since the driving component is provided with three groups of filtering parts, when the filtering part containing the sample is being precipitated and monitored, another group of filtering parts will be inserted into the pipeline component during the rotation of the driving component for the next monitoring, realizing continuous monitoring;

[0030] The flushing component and the liquid discharging component of the present invention can flush the filtering medium and the solution storage part after solution monitoring to avoid affecting the accuracy of subsequent monitoring. After solution monitoring, the flushing part of the flushing component flushes and cleans the solution storage part of the solution component, and at the same time the liquid flushed out is discharged through the liquid discharging component;

[0031] The ventilation component and the exhaust component of the present invention can perform anti-cleaning on the gas sample inside the device and filter the discharged gas sample. After the sample monitoring is completed, the channel changing component operates and rotates to change the entrances and exits of the pipeline part of the pipeline component. Then, the blowing part of the pipeline component blows air into the pipeline part to blow the residual sample inside the pipeline part into the exhaust component, filter the residual sample, and discharge the filtered gas. Description of the Drawings

[0032] Figure 1 is the overall structural schematic diagram of the present invention;

[0033] Figure 2 is the overall cross-sectional schematic diagram of the present invention;

[0034] Figure 3 is the cross-sectional schematic diagram of the pipeline component in the present invention;

[0035] Figure 4 is the cross-sectional schematic diagram of the lane-changing component in the present invention;

[0036] Figure 5 is the disassembled schematic diagram of the exhaust component in the present invention;

[0037] Figure 6 is the cross-sectional schematic diagram of the exhaust component in the present invention;

[0038] Figure 7 is in the present invention Figure 6 the enlarged view of part A;

[0039] Figure 8 is the rear view schematic diagram of the whole in the present invention;

[0040] Figure 9 is the rear view cross-sectional view of the whole in the present invention;

[0041] Figure 10 is the structural schematic diagram of the driving component in the present invention;

[0042] Figure 11 is the positional schematic diagram of the solution component and the driving component in the present invention;

[0043] Figure 12 is the structural schematic diagram of the solution component in the present invention;

[0044] Figure 13 is the structural schematic diagram of the cleaning component in the present invention;

[0045] Figure 14 is the disassembled schematic diagram of the cleaning component and the solution component in the present invention;

[0046] Figure 15 is the flowchart of an acid-proof iodine-129 continuous monitoring method proposed in the present invention.

[0047] In the drawings, the list of components represented by each reference numeral is as follows:

[0048] 10. Body; 20. Ventilation component; 21. Pipeline component; 211. Sample tube; 212. Air inlet; 213. Air supply pipe; 214. Exhaust pipe; 215. Blowing pipe; 216. Air pump; 22. Lane-changing component; 221. First ball core; 222. First motor; 223. Second ball core; 224. Second motor; 30. Exhaust component; 31. Filter box; 32. Filter plate; 33. Slot; 34. Insert block; 35. Pull rope; 36. Spring; 40. Monitoring component; 41. Driving component; 411. Third motor; 412. Rotating frame; 413. Filter medium; 42. Solution component; 421. Solution chamber; 422. Solution tank; 423. First liquid pump; 424. Liquid supply pipe; 425. Liquid spraying plate; 50. Cleaning component; 51. Flushing component; 511. Second liquid pump; 512. Water distribution pipe; 513. Upper flushing plate; 514. Lower flushing plate; 52. Liquid drainage component; 521. Liquid drainage pipe; 522. Collection pipe. Detailed implementation manners

[0049] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific implementation manners of the present invention with reference to the accompanying drawings of the specification.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0051] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in a preferred implementation manner" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0052] Furthermore, the present invention is described in detail with reference to the schematic diagrams. When describing the embodiments of the present invention in detail, for the sake of clarity, the cross-sectional views showing the device structures are enlarged locally not in accordance with the general scale, and the schematic diagrams are only examples and should not limit the scope of protection of the present invention herein. In addition, in actual production, three-dimensional spatial dimensions including length, width, and depth should be included.

[0053] Embodiment 1

[0054] Please refer to the appendix Figures 1-14As shown, this is the first embodiment of the present invention. This embodiment provides an aerosol continuous monitoring device, which includes a body 10. A ventilation component 20 is arranged in the inner cavity of the body 10. An exhaust component 30 is fixedly connected to the top of the body 10. A monitoring component 40 is arranged in the middle of the inner cavity of the body 10. A cleaning component 50 is arranged in the monitoring component 40;

[0055] The ventilation component 20 includes a pipeline component 21 fixedly connected to the inner cavity of the body 10. A lane-changing component 22 is arranged in the inner cavity of the pipeline component 21;

[0056] The monitoring component 40 includes a driving component 41 arranged in the inner cavity of the body 10. A solution component 42 is arranged in the inner cavity of the body 10;

[0057] The cleaning component 50 includes a flushing component 51 arranged in the inner cavity of the body 10. A liquid drainage component 52 is arranged at the bottom of the solution component 42;

[0058] Among them, when the aerosol gas contacts the driving component 41 through the pipeline component 21, the driving component 41 filters out the aerosol particles and dissolves the particles through the solution component 42 for monitoring;

[0059] When the sample monitoring is completed, the flushing component 51 flushes the residual sample in the solution component 42 and discharges it through the liquid drainage component 52. The lane-changing component 22 rotates along the inner cavity of the pipeline component 21, switches the path in the inner cavity of the pipeline component 21, and blows air in the reverse direction to the pipeline component 21, driving the residual sample in the pipeline component 21 into the exhaust component 30.

[0060] It should be noted that multiple groups of annular empty grooves are opened in the inner cavity of the body 10 for storing the driving component 41 and the solution component 42, aiming to monitor particles of different sizes and improve the diversity of monitoring.

[0061] In this embodiment, after the sample enters the pipeline assembly 21, it comes into contact with the filtering part of the driving assembly 41. The driving assembly 41 intercepts the aerosol particles in the sample through the built-in filtering part. After these particles are intercepted, with the operation of the solution assembly 42, they are dissolved by a specific solution and then follow-up monitoring steps are carried out. When the sample monitoring is completed, in order to maintain the cleanliness and accuracy of the device, the cleaning assembly 50 starts to work. The flushing assembly 51 sends the cleaning liquid into the body 10 to flush the solution storage part and the filtering part in the solution assembly 42. This flushing process can not only effectively remove the residual sample, but also wash away the impurities that may adhere to the inner wall of the device, ensuring the accuracy of the next monitoring. The flushed liquid and the dissolved sample solution are discharged through the liquid discharge assembly 52. At the same time, the lane-changing assembly 22 starts to work after the sample monitoring is completed, changing the inlet and outlet directions of the pipeline part in the pipeline assembly 21. Immediately afterwards, the blowing part of the pipeline assembly 21 works, blowing air into the pipeline part to blow the residual sample in the pipeline part into the exhaust assembly 30. After the exhaust assembly 30 filters the blown-in residual sample, it is discharged from the device.

[0062] Secondly, please refer to again Figures 2-4 , the pipeline assembly 21 includes a sample tube 211 fixedly connected to the inner cavity of the body 10. An air inlet 212 is opened on the left side of the top of the sample tube 211, and an air supply pipe 213 is connected to the right side of the top. An exhaust pipe 214 is opened at the top of the bottom end of the sample tube 211, and a blowing pipe 215 is opened at the bottom of the bottom end. An air pump 216 is fixedly connected to the right bottom of the body 10, and the top outlet of the air pump 216 is connected to the blowing pipe 215;

[0063] The lane-changing assembly 22 includes a first ball core 221 rotatably connected to the top of the sample tube 211. A first motor 222 is fixedly connected to the top of the sample tube 211, and the output shaft of the first motor 222 is fixedly connected to the top of the first ball core 221. A second ball core 223 is rotatably connected to the bottom of the sample tube 211. A second motor 224 is fixedly connected to the right side of the bottom of the sample tube 211, and the output shaft of the second motor 224 is fixedly connected to the right end of the second ball core 223.

[0064] It should be noted that L-shaped channels are opened in both the first ball core 221 and the second ball core 223, and sealing layers are provided at the parts where the first ball core 221 and the second ball core 223 are in contact with the sample tube 211;

[0065] Multiple sets of inlets are opened on the sample tube 211, aiming to facilitate the feeding of inert gas into the pipeline to improve safety.

[0066] In this embodiment, the sample tube 211 accesses the sample gas from the air inlet 212, and the sample gas is discharged from the exhaust pipe 214 after the detection is completed. In the cleaning stage after the detection is completed, the first motor 222 and the second motor 224 drive the first ball core 221 and the second ball core 223 to rotate respectively, so that the original passage path of "air inlet 212 - sample tube 211 - exhaust pipe 214" is changed to "blow pipe 215 - sample tube 211 - air supply pipe 213". Subsequently, the air pump 216 is started, and gas is blown into the sample tube 211 through the blow pipe 215 to blow the residual sample into the exhaust assembly 30.

[0067] Secondly, please refer to again Figures 4-7 , the exhaust assembly 30 includes a filter box 31 fixedly connected to the top of the body 10. A plurality of groups of filter plates 32 are movably inserted into the inner cavity of the filter box 31. A slot 33 is opened at the top of the filter box 31. A plug 34 is slidably connected to the inner cavity of the filter plate 32. A pull rope 35 is fixedly connected to one side of the plug 34 located in the inner cavity of the filter plate 32. The pull rope 35 is movably sleeved in the filter plate 32, and the top end of the pull rope 35 extends out of the filter plate 32. A spring 36 is fixedly connected to the inner cavity of the filter plate 32, and the other end of the spring 36 is fixedly connected to the plug 34.

[0068] It should be noted that there are two front and rear plugs 34, and the two front and rear plugs 34 are connected by a pull rope 35, aiming to drive the two plugs 34 to move by using a set of pull ropes 35.

[0069] In this embodiment, after the residual sample gas enters the filter box 31, through the filtration of multiple groups of filter plates 32, the purpose of removing harmful substances and impurities in the residual sample is achieved. The disassembly and replacement process of the filter plate 32 is simple and fast. Just pull the pull rope 35 at the top, and the pull rope 35 drives the two front and rear plugs 34 to move inward at the same time until the plug 34 completely disengages from the slot 33. At this time, the filter plate 32 loses its fixation and can be easily taken out of the filter box 31. When replacing a new filter plate 32, just insert the new filter plate 32 into the corresponding position of the filter box 31, align the plug 34 with the slot 33, and then release the pull rope 35. The elastic force of the spring 36 makes the plug 34 automatically insert into the slot 33 to fix the filter plate 32.

[0070] Secondly, please refer to again Figure 2 、 Figures 8-14 , the driving assembly 41 includes a third motor 411 fixedly connected to the inner cavity of the body 10. A rotating frame 412 is fixedly connected to the output shaft of the third motor 411. A filter medium 413 is fixedly connected to the inner cavity of the rotating frame 412;

[0071] The solution component 42 includes a solution chamber 421 opened in the inner cavity of the body 10. A solution tank 422 is fixedly connected to the bottom of the rear side of the body 10. A first liquid pump 423 is fixedly connected to the top of the solution tank 422. The inlet of the first liquid pump 423 is communicated with the solution tank 422. The outlet of the first liquid pump 423 is communicated with a liquid delivery pipe 424. The outlet of the liquid delivery pipe 424 is communicated with a liquid spraying plate 425. The outlet of the liquid spraying plate 425 is in contact connection with the filter medium 413.

[0072] The flushing component 51 includes a second liquid pump 511 fixedly connected to the rear side of the body 10. The outlet of the second liquid pump 511 is communicated with a water distribution pipe 512. The outlet of the water distribution pipe 512 is connected with a plurality of upper flushing plates 513 and lower flushing plates 514. The bottom outlets of the upper flushing plates 513 are all arranged at the top of the inner cavity of the solution chamber 421. The bottom outlets of the lower flushing plates 514 are arranged on the right side of the filter medium 413 located on the front side of the body 10.

[0073] The liquid discharge component 52 includes a liquid discharge pipe 521 communicated with the bottom of the inner cavity of the solution chamber 421. The bottom outlet of the liquid discharge pipe 521 extends out of the rear side of the body 10 and is communicated with a collecting pipe 522.

[0074] Three metal rings are annularly arranged on the outer ring of the rotating frame 412, and the filter media 413 are all arranged within the three metal rings. Among them, the filter medium 413 located above extends into the sample tube 211. The filter medium 413 located on the front side is in contact with the lower flushing plate 514, and the filter medium 413 located on the rear side is in contact with the liquid spraying plate 425. Moreover, the body 10 is also provided with an empty slot in the area to the left of the lower flushing plate 514, and the liquid discharge pipe 521 is also communicated with the bottom of the empty slot.

[0075] It should be noted that a perspective layer is provided in the middle of the solution tank 422 to facilitate viewing the remaining amount of the solution.

[0076] In this embodiment, after the sample gas contacts the filter medium 413, the filter medium 413 adsorbs and collects the target substance in the sample gas, completing the sample collection process. Subsequently, the third motor 411 drives the rotating frame 412 to slowly rotate, driving the filter medium 413 to rotate, separating the filter medium 413 carrying the sample from the sample tube 211, and contacting the liquid spraying plate 425. Immediately afterwards, the first liquid pump 423 is started, extracts the solution from the solution tank 422, and transports it to the liquid spraying plate 425 through the liquid delivery pipe 424. The solution is evenly sprayed on the filter medium 413 through the nozzles of the liquid spraying plate 425, enabling the solution to fully contact the sample on the filter medium 413, achieving the purpose of dissolving or eluting the target substance in the sample. The solution carrying the sample then flows into the solution chamber 421 for storage and monitoring. After the detection is completed, the filter medium 413 with the completed sample is driven to move and contacts the lower flushing plate 514 located on the front side of the inner cavity of the machine body 10. The second liquid pump 511 starts to work, and transports clear water to the upper flushing plate 513 and the lower flushing plate 514 respectively through the water distribution pipe 512. The bottom outlet of the upper flushing plate 513 sprays water on the top inner cavity of the solution chamber 421 to flush the solution chamber 421, while the bottom outlet of the lower flushing plate 514 directly sprays water on the right side of the filter medium 413 located on the front side of the machine body 10 to further flush the filter medium 413, ensuring that the sample is completely dissolved or eluted. As the flushing progresses, the solution containing the sample gradually flows to the bottom of the solution chamber 421 and is discharged from the machine body 10 through the drain pipe 521 and finally enters the collecting pipe 522 for discharge.

[0077] In addition, in order to ensure the full utilization of the solution and reduce waste, a liquid level sensor can be set in the solution tank 422. When the solution volume is lower than a certain threshold, the system can automatically issue an alarm to remind the user to add the solution in a timely manner. Finally, when the entire processing process is completed, the filter medium 413 can be rotated back to the position of the sample tube 211 by controlling the third motor 411 to reverse, waiting for the next sample processing. At the same time, the filter box 31 can be disassembled, the filter plate 32 can be taken out and replaced to ensure the continuous and stable operation of the system.

[0078] Embodiment 2

[0079] Please refer to the appendix Figure 15 This embodiment provides a monitoring method for acid-proof iodine-129, which is used to monitor acid-proof iodine-129 by any one of the above aerosol continuous monitoring devices. The monitoring method includes: S1: Prepare the whole continuous monitor in advance. The whole continuous monitor consists of 2 sets of the above aerosol continuous monitoring devices, 1 set of on-site processing and display unit, 1 acid-proof pump, 1 electrical box, 1 flow meter, 2 differential pressure gauges, and 1 set of equipment racks.

[0080] S2: Pump the gas to be measured containing Kr-85 and I-129 nuclides in the process pipeline into the filter valve. The filter valve filters the radioactive aerosol and impurity clusters in the gas to be measured. The mixed gas after being processed by the filter valve enters the first aerosol continuous monitoring device;

[0081] S3: Monitor I-129 in the first aerosol continuous monitoring device. Therefore, the measured value uploaded to the on-site processing box is the mixed count value of the region of interest, that is, the Compton plateau of Kr-85 and the mixed count value of I-129 in the region of interest. The data form is channel address - count. When the mixed gas enters the second aerosol continuous monitoring device through the first aerosol continuous monitoring device, the measured value of the second aerosol continuous monitoring device is the count of the Compton plateau of Kr-85 in the region of interest;

[0082] S4: The processing box queries the real-time CPS values from the two aerosol continuous monitoring devices, denoted as CPS1 (count value of the mixed gas) and CPS2 (count value of krypton), and calculates their differential count n (count value of iodine absorbed by the second iodine box). After the gas passes through the aerosol continuous monitoring device, the original electrical signal is filtered and amplified by the operational amplifier circuit board and transmitted to the ADC. Through analog-to-digital conversion, a digital signal is formed, and the original event information is obtained through FPGA digital processing. To enhance the anti-interference ability of the signal, the output signal is uploaded to the on-site processing box in the form of RS485;

[0083] Among them, iodine boxes are installed at the front ends of the two aerosol continuous monitoring devices, and the iodine boxes are used to absorb the passing iodine. During the detection process, the iodine box at the front end of the first aerosol continuous monitoring device absorbs a part of the iodine. At this time, the first aerosol continuous monitoring device monitors the mixed count value (CPS1) of the Compton plateau of krypton and iodine in the region of interest. The data form is channel address - count. Subsequently, the iodine box at the front end of the second aerosol continuous monitoring device will absorb the remaining iodine. At this time, the gas count value monitored by the second aerosol continuous monitoring device is the count of the Compton plateau of krypton in the region of interest (CPS2), so as to separate krypton from iodine and avoid affecting the monitoring results.

[0084] S5: The on-site processing and display unit is used to perform data calculation, data analysis, display on the uploaded data, and perform alarm and status judgment according to the alarm threshold, and at the same time control the start and stop of the pump.

[0085] It should be noted that the on-site processing and display unit, the electrical box, and the equipment rack are the equipment required for installation and operation during the detection process;

[0086] The flowmeter is used to calculate the flow rate of the gas entering the device, and the differential pressure gauge is used to calculate the differential pressure before and after the two aerosol monitors;

[0087] During the detection process, the above aerosol continuous monitoring device and the iodine box need to be placed in a lead chamber to prevent pollution leakage.

[0088] In this embodiment, the calculation method in S4 is n = CPS1 - CPS2.

[0089] In the formula:

[0090] n — Differential count;

[0091] CPS1 — Real-time count of aerosol continuous monitoring device 1;

[0092] CPS2 — Real-time count of aerosol continuous monitoring device 2;

[0093] The processing box performs filtering and smoothing calculations on the obtained differential n, involving the filtering constant N0, the filtering time t, and the smoothing time T0, to obtain the final differential count n. i , according to n i Calculate the concentration value of I-129 through formula (2).

[0094] Formula (2):

[0095]

[0096] In formula (2):

[0097] C — Currently displayed concentration value, unit Bq / m 3 ;

[0098] n i + 1 — Average count rate of the (i + 1)-th T period, unit Hz;

[0099] n i — Average count rate of the i-th T period, unit Hz;

[0100] n ab — Instrument environmental background count, unit Hz;

[0101] λ — 129 Decay constant of I, value 1.4×10-15 s-1;

[0102] S — Instrument sensitivity, unit Hz / Bq;

[0103] Q — Sample flow rate, unit m 3 / h;

[0104] T — Measurement time required to obtain a count rate n i or n i+1 Unit s;

[0105] The region of interest is written through the processing box according to the experimental results later. Before using the two aerosol continuous monitoring devices, they are first calibrated with an Am-241 source to ensure the consistency of the two monitoring devices, and the second detection device is used to calibrate the detected data to ensure accuracy. At the same time, according to the above calculation formula, the amount of iodine-129 deposited on the second iodine box can be reflected and judged. Specifically, the difference n is obtained by CPS1 (the count of the iodine-krypton mixed gas after the first iodine box adsorption) - CPS2 (the count of the iodine-krypton mixed gas after the second iodine box adsorption). i， , at this time n i The obtained value is the iodine content absorbed by the second iodine box.

[0106] At the same time, in addition to judging whether the iodine box needs to be replaced by the pressure difference of the differential pressure gauge at both ends of the iodine box, if residual iodine content is detected in CPS2, the iodine box needs to be replaced. By combining the above two methods, the replacement of the iodine box is made more flexible.

[0107] And after the detection is completed, through the backwashing process mentioned above, the impurities remaining in the detection in the equipment are cleaned to avoid affecting the accuracy of the next detection.

[0108] The working principle of the present invention is as follows: the sample tube 211 is connected to the sample gas from the air inlet 212, so that the sample gas contacts the filter medium 413. After the contact, the filter medium 413 adsorbs and collects the target substance in the sample gas, completing the sample collection process. Subsequently, the third motor 411 drives the rotating frame 412 to rotate slowly, driving the filter medium 413 to rotate, so that the filter medium 413 carrying the sample is separated from the sample tube 211 and contacts the liquid spray plate 425. Then, the first liquid pump 423 is started, and the solution is extracted from the solution tank 422 and transported to the liquid spray plate 425 through the liquid delivery pipe 424. The solution is evenly sprayed on the filter medium 413 through the nozzle of the liquid spray plate 425, so that the solution is fully in contact with the sample on the filter medium 413, so as to achieve the purpose of dissolving or eluting the target substance in the sample, and the solution carrying the sample is The sample flows into the solution chamber 421 for storage and monitoring. After the test is completed, the filter medium 413 that has released the sample is driven to move and contacts the lower shower plate 514 located at the front side of the inner cavity of the body 10. The second liquid pump 511 starts to work and transports clean water to the upper shower plate 513 and the lower shower plate 514 through the water distribution pipe 512. The bottom outlet of the upper shower plate 513 sprays water on the top of the inner cavity of the solution chamber 421 to rinse the solution chamber 421, while the bottom outlet of the lower shower plate 514 sprays water directly on the right side of the filter medium 413 located at the front side of the body 10, further The filter medium 413 is rinsed to ensure that the sample is completely dissolved or eluted. As the rinsing proceeds, the solution containing the sample gradually flows into the bottom of the solution cavity 421, and is discharged from the body 10 through the drain pipe 521, and finally enters the collection pipe 522 for discharge. On the other hand, the sample gas is discharged from the exhaust pipe 214 after the detection is completed. In the cleaning stage after the detection is completed, the first motor 222 and the second motor 224 drive the first ball core 221 and the second ball core 223 to rotate respectively, so that the original channel path of "gas inlet 212-sample tube 211-exhaust pipe 214" is changed to "blowing Air pipe 215-sample tube 211-air delivery pipe 213", then the air pump 216 is started, and gas is blown into the sample tube 211 through the air blowing pipe 215, and the residual sample is blown into the filter box 31. After filtering through multiple groups of filter plates 32, the harmful substances and impurities in the residual sample are removed and then discharged. When the filter plate 32 needs to be replaced, it is only necessary to pull the pull rope 35 on the top, and the pull rope 35 drives the front and rear plug blocks 34 to move inward at the same time until the plug blocks 34 are completely detached from the slots 33. At this time, the filter plate 32 loses its fixation and can be easily taken out of the filter box 31. When replacing a new filter plate 32, it is only necessary to insert the new filter plate 32 into the corresponding position of the filter box 31, align the plug block 34 with the slot 33, and then release the pull rope 35. The elastic force of the spring 36 causes the plug block 34 to automatically insert into the slot 33, and the filter plate 32 can be fixed.

[0109] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. The structures, devices, and operation methods not specifically described and explained in the present invention are implemented by conventional means in the art without special explanation and limitation.

Claims

1. An aerosol continuous monitoring device, characterized in that: include: A machine body (10), wherein an inner cavity of the machine body (10) is provided with a ventilation component (20), an exhaust component (30) is fixedly connected to the top of the machine body (10), a monitoring component (40) is provided in the middle of the inner cavity of the machine body (10), and a cleaning component (50) is provided in the monitoring component (40); A ventilation assembly (20), the ventilation assembly (20) comprising a pipe assembly (21) fixedly connected to the inner cavity of the body (10), the inner cavity of the pipe assembly (21) being provided with a channel changing assembly (22); A monitoring component (40), the monitoring component (40) comprising a driving component (41) disposed in an inner cavity of a body (10), the inner cavity of the body (10) being provided with a solution component (42); A cleaning component (50), the cleaning component (50) comprising a flushing component (51) arranged in the inner cavity of the body (10), and a drainage component (52) is arranged at the bottom of the solution component (42); When the aerosol gas sample contacts the driving component (41) through the pipeline component (21), the driving component (41) filters out aerosol particles, and the particles are dissolved and monitored through the solution component (42); When the sample monitoring is completed, the flushing component (51) flushes the residual sample in the solution component (42) and discharges it through the drainage component (52), and the channel switching component (22) rotates along the inner cavity of the pipeline component (21), switches the path of the inner cavity of the pipeline component (21), and blows air in the opposite direction to the pipeline component (21), driving the residual sample in the pipeline component (21) into the exhaust component (30).

2. The aerosol continuous monitoring device according to claim 1, characterized in that: The pipeline assembly (21) comprises a sample tube (211) fixedly connected to the inner cavity of the body (10); an air inlet (212) is provided on the left side of the top of the sample tube (211), and the right side of the top is connected to an air supply pipe (213); an exhaust pipe (214) is provided on the top of the bottom end of the sample tube (211), and an air blowing pipe (215) is provided on the bottom of the bottom end; an air pump (216) is fixedly connected to the bottom right side of the body (10), and the top outlet of the air pump (216) is connected to the air blowing pipe (215).

3. The aerosol continuous monitoring device according to claim 2, characterized in that: The lane changing assembly (22) comprises a first ball core (221) rotatably connected to the top of a sample tube (211); a first motor (222) is fixedly connected to the top of the sample tube (211); an output shaft of the first motor (222) is fixedly connected to the top of the first ball core (221); a second ball core (223) is rotatably connected to the bottom of the sample tube (211); a second motor (224) is fixedly connected to the right side of the bottom of the sample tube (211); and an output shaft of the second motor (224) is fixedly connected to the right end of the second ball core (223).

4. The aerosol continuous monitoring device according to claim 1, characterized in that: The exhaust assembly (30) comprises a filter box (31) fixedly connected to the top of the machine body (10); a plurality of groups of filter plates (32) are movably inserted into the inner cavity of the filter box (31); a slot (33) is provided at the top of the filter box (31); an insert block (34) is slidably connected to the inner cavity of the filter plate (32); a pull rope (35) is fixedly connected to one side of the insert block (34) located in the inner cavity of the filter plate (32); the pull rope (35) is movably sleeved in the filter plate (32), and the top end of the pull rope (35) extends out of the filter plate (32); a spring (36) is fixedly connected to the inner cavity of the filter plate (32); the other end of the spring (36) is fixedly connected to the insert block (34).

5. The aerosol continuous monitoring device according to claim 2, characterized in that: The driving assembly (41) comprises a third motor (411) fixedly connected to the inner cavity of the machine body (10); a rotating frame (412) is fixedly connected to the output shaft of the third motor (411); and a filter medium (413) is fixedly connected to the inner cavity of the rotating frame (412).

6. The aerosol continuous monitoring device according to claim 5, characterized in that: The solution component (42) comprises a solution cavity (421) opened in the inner cavity of the body (10); a solution tank (422) is fixedly connected to the bottom of the rear side of the body (10); a first liquid pump (423) is fixedly connected to the top of the solution tank (422); an inlet of the first liquid pump (423) is connected to the solution tank (422); an outlet of the first liquid pump (423) is connected to a liquid delivery pipe (424); an outlet of the liquid delivery pipe (424) is connected to a liquid spray plate (425); and an outlet of the liquid spray plate (425) is in contact with and connected to a filter medium (413).

7. The aerosol continuous monitoring device according to claim 6, characterized in that: The flushing assembly (51) comprises a second liquid pump (511) fixedly connected to the rear side of the machine body (10); the outlet of the second liquid pump (511) is connected to a water distribution pipe (512); the outlet of the water distribution pipe (512) is connected to a plurality of groups of upper flushing plates (513) and lower flushing plates (514); the bottom outlets of the upper flushing plates (513) are all arranged at the top of the inner cavity of the solution cavity (421); and the bottom outlets of the lower flushing plates (514) are arranged on the right side of the filter medium (413) located at the front side of the machine body (10).

8. The aerosol continuous monitoring device according to claim 7, characterized in that: The drainage assembly (52) comprises a drainage pipe (521) connected to the bottom of the inner cavity of the solution cavity (421); the bottom outlet of the drainage pipe (521) extends out of the rear side of the machine body (10) and is connected to a collecting pipe (522).

9. The aerosol continuous monitoring device according to claim 8, characterized in that: The outer ring of the rotating frame (412) is provided with three groups of metal rings in an annular shape, and the filter media (413) are all arranged in the three groups of metal rings, wherein the filter medium (413) located at the top extends into the sample tube (211), the filter medium (413) located at the front side contacts the lower shower plate (514), and the filter medium (413) located at the rear side contacts the liquid spraying plate (425), and the body (10) is also provided with an empty groove in the area on the left side of the lower shower plate (514), and the drain pipe (521) is also connected to the bottom of the empty groove.

10. A method for monitoring acid-proof iodine-129, characterized in that: The aerosol continuous monitoring device according to any one of claims 1 to 9 is used for acid-proof iodine-129 monitoring, comprising: S1: Prepare the continuous monitoring instrument in advance. The continuous monitoring instrument consists of two aerosol continuous monitoring devices mentioned above, one local processing display unit, one acid-proof pump, one electrical box, one flow meter, two differential pressure gauges, and one equipment rack; S2: Pump the gas to be tested containing Kr-85 and I-129 nuclides in the process pipeline into the filter valve, which filters the radioactive aerosol and impurity clusters in the gas to be tested. The mixed gas after being treated by the filter valve enters the aerosol continuous monitoring device 1; S3: I-129 is monitored in the aerosol continuous monitoring device 1, so the measurement value uploaded to the on-site processing box by the aerosol continuous monitoring device 1 is the mixed count value of the area of ​​interest, that is, the mixed count value of Kr-85 in Compton Flat and I-129 in the area of ​​interest, and the data format is address-count. When the mixed gas passes through the aerosol continuous monitoring device 1 and enters the aerosol continuous monitoring device 2, the measurement value of the aerosol continuous monitoring device 2 is the count of Kr-85 in Compton Flat in the area of ​​interest; S4: The processing box queries the real-time CPS values ​​of the two aerosol continuous monitoring devices, recorded as CPS1 and CPS2, and calculates their differential count n. After the gas passes through the aerosol continuous monitoring device, the original electrical signal is filtered and amplified by the operational amplifier circuit board and transmitted to the ADC, and a digital signal is formed through analog-to-digital conversion; S5: The local processing and display unit is used to calculate, analyze and display the data uploaded by the aerosol continuous monitoring device, and to make alarms and status judgments according to the alarm thresholds, while controlling the start and stop of the pump.

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