Radioactive waste liquid decay pool automatic control system with sediment cleaning function

Abstract

The utility model discloses a radioactive waste liquid decay tank automatic control system with a sediment cleaning function, which belongs to the technical field of decay tanks and comprises a decay tank module. The decay tank module comprises a decay tank, a partition plate, a valve, a decay tank inlet, a coagulant aid adding port, an exhaust port, a sampling port, a sediment discharge port and a waste liquid discharge port, and further comprises a control module. Through the mode, the decay tank disclosed by the utility model can be used for scraping precipitates adhered to the inner wall of the decay tank during previous precipitation, and high-radioactivity waste liquid and low-radioactivity waste liquid are separately precipitated, so that the volume demand of the decay tank is reduced, and the precipitation time is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of decay pools, in particular to an automatic control system for a radioactive waste liquid decay pool with sedimentation and cleaning functions. Background Art

[0002] With the widespread popularization of medical technology, nuclear medicine has also been applied to all aspects of hospital testing and treatment, which has resulted in the generation of radioactive medical and domestic waste liquids. These waste liquids need to be stored in decay pools and discharged after they meet the emission standards.

[0003] Chinese patent CN216849347U discloses a radioactive waste liquid decay pool treatment system, including a degradation pool, a sampling pool, a sampling water inlet solenoid valve, multiple decay pools, multiple water inlet solenoid valves, multiple pumping motors, a sampling water discharge solenoid valve, a sewage discharge solenoid valve and a field controller.

[0004] However, this patent is unable to differentiate between waste liquids and mixes high-radioactive waste liquids with low-radioactive waste liquids, which increases the sedimentation time of the waste liquids and the volume requirement of the decay pool, and places increasing demands on the decay pool site space and construction costs.

[0005] Based on this, the utility model designs a radioactive waste liquid decay pool automatic control system with sedimentation and cleaning functions to solve the above problems. Utility Model Content

[0006] In view of the above-mentioned shortcomings of the prior art, the utility model provides an automatic control system for a radioactive waste liquid decay pool with a sedimentation and cleaning function.

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] An automatic control system for a radioactive waste liquid decay pool with sedimentation and cleaning functions;

[0009] Includes decay cell module;

[0010] The decay pool module comprises a decay pool, a partition, a valve, a decay pool inlet, a coagulant addition port, an exhaust port, a sampling port, a sedimentation outlet and a waste liquid outlet. There are at least four decay pools, and the decay pools comprise a high-radioactivity decay pool and a low-radioactivity decay pool. A partition is provided between two adjacent decay pools, and a valve is installed on the partition. The valve is connected to the control module. The upper end of the decay pool is fixedly connected with the decay pool inlet, the coagulant addition port and the exhaust port. The decay pool inlet, the coagulant addition port and the exhaust port are all fixedly installed with an electromagnetic valve. The lower end of the decay pool is fixedly connected with a sampling port and a sedimentation outlet. The front side of the lower end of the decay pool is fixedly connected with a waste liquid outlet. The sampling port, the sedimentation outlet and the waste liquid outlet are all fixedly connected with an electromagnetic valve.

[0011] A control module is also included.

[0012] Furthermore, the control module includes a central control module, a cleaning module for cleaning the inner wall of the decay pool and stirring, a protection module for protecting the decay pool, a liquid level measurement module for measuring the liquid level in the decay pool, an activity measurement module for detecting the radioactive activity value of the waste liquid, a sampling module for sampling, an alarm module for alarming, an air concentration detection module for detecting the radioactive concentration of the air and a coagulant adding module for adding a coagulant. The cleaning module, protection module, liquid level measurement module, activity measurement module, sampling module, alarm module, air concentration detection module and coagulant adding module are all connected to the central control module.

[0013] Furthermore, the activity measurement module is fixedly mounted on the connecting pipe, and the connecting pipe is connected to the inlet of the decay cell.

[0014] Furthermore, the liquid level measurement module is fixedly installed above the inner wall of the decay tank.

[0015] Furthermore, the cleaning module includes a driving module for driving the stirring module, a stirring module for stirring the coagulant and the waste liquid, and a scraper module for scraping off the sediment on the inner wall of the decay tank. The stirring module is connected to the driving module, and the scraper module is connected to the stirring module.

[0016] Furthermore, the drive module is connected to the central control module.

[0017] Furthermore, the protection module includes an exhaust module for controlling the exhaust port solenoid valve, a seismic sensing module for detecting whether an earthquake or vibration occurs, and a valve control module for controlling the valve. The valve control module is connected to the valve, and the exhaust module, the valve control module and the seismic sensing module are all connected to the central control module.

[0018] Furthermore, the activity measurement module is a pipeline wastewater radioactivity detector.

[0019] Furthermore, the liquid level measurement module is a non-contact radar level meter.

[0020] Furthermore, the lower interior of the decay pool is in an inverted cone shape.

[0021] The utility model has the following technical effects:

[0022] The air concentration detection module of the utility model detects the radioactive concentration in the air. When the radioactive concentration in the air increases rapidly, the air concentration detection module transmits the result to the central control module, and the central control module controls the alarm module to sound an alarm to remind workers to come for maintenance;

[0023] When the utility model is used, the medical radioactive waste liquid flows into the connecting pipe, and the radioactive activity value of the waste liquid is detected by the activity measurement module and the result is transmitted to the central control module. The central control module makes a judgment on the result. If the result is low radioactivity, it is discharged into the low radioactive decay pool through the control of the electromagnetic valve. If the result is high radioactivity, it is discharged into the high radioactive decay pool through the control of the electromagnetic valve. The high radioactive waste liquid and the low radioactive waste liquid are precipitated separately, which reduces the volume requirement of the decay pool and reduces the precipitation time. The waste liquid decays naturally in the decay pool and gradually reduces the radioactivity. The sampling module samples and detects the waste liquid in the decay pool. If the discharge standard is met, the waste liquid is discharged from the decay pool through the electromagnetic valve of the waste liquid discharge port.

[0024] The waste liquid detected by the activity measurement module of the utility model is first discharged into the first high-radioactive decay pool or the low-radioactive decay pool through the electromagnetic valve at the entrance of the first decay pool. At this time, the electromagnetic valves at the entrances of other decay pools are all in a closed state, and the liquid level measurement module determines the volume of waste liquid injected into the decay pool in real time. When the injected waste liquid reaches the set value, the central control module controls the electromagnetic valve at the entrance of the first decay pool to close, and the central control module controls the electromagnetic valve at the coagulant addition port to open. The coagulant addition module adds coagulant into the decay pool, and the cleaning module stirs the coagulant and the waste liquid, and scrapes off the sediment adhered to the inner wall of the decay pool during the last sedimentation. At the same time, the waste liquid is discharged into the second high-radioactive decay pool or the low-radioactive decay pool through the electromagnetic valve at the entrance of the second decay pool. Radioactive decay pool, repeat the above operation, when the last decay pool is filled with waste liquid, the central control module controls the first sampling port solenoid valve to open, the sampling module samples and detects the waste liquid in the first decay pool, when it reaches the discharge standard, the central control module controls the waste liquid discharge outlet solenoid valve to open, and discharges the waste liquid in the decay pool, when the liquid level measurement module detects that the waste water in the first decay pool is emptied, the central control module controls the sedimentation discharge outlet solenoid valve to open, and discharges the sediment in the decay pool, when the liquid level measurement module detects that the waste liquid in the last decay pool reaches the set control liquid level, the central control module closes the last decay pool inlet solenoid valve, and opens the first decay pool inlet solenoid valve at the same time, injects waste liquid into the first decay pool, and circulates in sequence;

[0025] During cleaning, the central control module controls the driving module to start, the driving module drives the stirring module to rotate to stir the coagulant and the waste liquid, speeding up the formation of precipitation, and the stirring module drives the scraper module to rotate to scrape off the precipitation stuck to the inner wall of the decay tank during the last precipitation;

[0026] The earthquake sensing module of the utility model detects whether an earthquake or vibration occurs and transmits the result to the central control module, and the central control module makes a judgment. When no vibration occurs, the valve control module and the valve do not work, and the exhaust module controls the exhaust port solenoid valve to open regularly to discharge the gas in the decay pool. When vibration occurs, the valve control module controls the valve to open, and the waste liquid in the decay pool with more waste liquid is discharged into the decay pool with less waste liquid, so as to prevent the waste liquid in the decay pool from shaking and hitting the inner wall of the decay pool, thereby causing damage. At the same time, the exhaust module controls the exhaust port solenoid valve to open to discharge the gas in the decay pool, thereby reducing the pressure in the decay pool. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model, and for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 This is a structural diagram of a decay pool module of a radioactive waste liquid decay pool automatic control system with sedimentation and cleaning functions according to the utility model;

[0029] Figure 2 This is a control module frame of a radioactive waste liquid decay pool automatic control system with sedimentation and cleaning functions of the utility model. Figure 1 ;

[0030] Figure 3 This is a control module frame of a radioactive waste liquid decay pool automatic control system with sedimentation and cleaning functions of the utility model. Figure 2 .

[0031] The numbers in the figure represent:

[0032] 1. Decay pool module; 11. Decay pool; 12. Partition; 13. Valve; 14. Decay pool inlet; 15. Coagulant addition port; 16. Exhaust port; 17. Sampling port; 18. Sedimentation outlet; 19. Waste liquid outlet; 2. Control module; 21. Central control module; 22. Cleaning module; 221. Drive module; 222. Stirring module; 223. Scraper module; 23. Exhaust module; 24. Valve control module; 25. Earthquake sensing module; 26. Liquid level measurement module; 27. Activity measurement module; 28. Sampling module; 29. ​​Alarm module; 210. Air concentration detection module; 211. Coagulant addition module. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] The utility model is further described below in conjunction with embodiments.

[0035] The terms “left”, “right”, “front”, “back”, “up” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0036] Example 1

[0037] Please refer to the instruction manual Figure 1-3 , an automatic control system for radioactive waste liquid decay pool with sedimentation and cleaning function;

[0038] It includes a decay pool module 1;

[0039] The decay pool module 1 includes a decay pool 11, a partition 12, a valve 13, a decay pool inlet 14, a coagulant addition port 15, an exhaust port 16, a sampling port 17, a sedimentation outlet 18 and a waste liquid outlet 19. There are at least four decay pools 11, and the decay pools 11 include a high-radioactive decay pool and a low-radioactive decay pool. A partition 12 is arranged between two adjacent decay pools 11, and a valve 13 is installed on the partition 12. The valve 13 is connected to the control module 2. The upper end of the decay pool 11 is fixedly connected with the decay pool inlet 14, the coagulant addition port 15 and the exhaust port 16. The decay pool inlet 14, the coagulant addition port 15 and the exhaust port 16 are all fixed. A solenoid valve is installed, and radioactive waste liquid enters the decay pool 11 from the decay pool inlet 14. The coagulant addition port 15 is used to add a coagulant to accelerate the precipitation of the waste liquid. The exhaust port 16 is used to release the methane in the decay pool to achieve the effect of reducing pressure and flame retardancy. The lower end of the decay pool 11 is fixedly connected with a sampling port 17 and a precipitation discharge port 18. The front side of the lower end of the decay pool 11 is fixedly connected with a waste liquid discharge port 19. The sampling port 17 is used for collecting waste liquid samples, the precipitation discharge port 18 is used to discharge the precipitation in the decay pool 11, and the waste liquid discharge port 19 is used to discharge the waste liquid in the decay pool 11. The sampling port 17, the precipitation discharge port 18 and the waste liquid discharge port 19 are all fixedly connected with a solenoid valve;

[0040] A control module 2 is also included.

[0041] The control module 2 includes a central control module 21, a cleaning module 22 for cleaning the inner wall of the decay pool 11 and stirring, a protection module for protecting the decay pool 11, a liquid level measurement module 26 for measuring the liquid level in the decay pool 11, an activity measurement module 27 for detecting the radioactive activity value of the waste liquid, a sampling module 28 for sampling, an alarm module 29 for alarming, an air concentration detection module 210 for detecting the radioactive concentration of the air, and a coagulant adding module 211 for adding a coagulant. The cleaning module 22, the protection module, the liquid level measurement module 26, the activity measurement module 27, the sampling module 28, the alarm module 29, the air concentration detection module 210 and the coagulant adding module 211 are all connected to the central control module 21.

[0042] The activity measurement module 27 is fixedly mounted on the connecting pipe, and the connecting pipe is connected to the decay cell inlet 14 .

[0043] The liquid level measurement module 26 is fixedly installed above the inner wall of the decay tank 11 .

[0044] The air concentration detection module 210 detects the radioactive concentration in the air. When the radioactive concentration in the air increases rapidly, the air concentration detection module 210 transmits the result to the central control module 21, and the central control module 21 controls the alarm module 29 to sound an alarm to remind workers to come for maintenance.

[0045] When in use, the medical radioactive waste liquid flows into the connecting pipe, and the radioactive activity value of the waste liquid is detected by the activity measurement module 27 and the result is transmitted to the central control module 21. The central control module 21 makes a judgment on the result. If the result is low radioactivity, it is discharged into the low radioactive decay pool 11 through the control of the electromagnetic valve. If the result is high radioactivity, it is discharged into the high radioactive decay pool 11 through the control of the electromagnetic valve. The high radioactive waste liquid and the low radioactive waste liquid are precipitated separately, which reduces the volume requirement of the decay pool and reduces the precipitation time. The waste liquid decays naturally in the decay pool 11 and gradually reduces the radioactivity. The sampling module 28 samples and detects the waste liquid in the decay pool 11. If the discharge standard is met, the waste liquid is discharged from the decay pool 11 through the electromagnetic valve of the waste liquid discharge port 19.

[0046] The waste liquid detected by the activity measurement module 27 is first discharged into the first high-radioactive decay pool 11 or the low-radioactive decay pool 11 through the solenoid valve of the first decay pool inlet 14. At this time, the solenoid valves of the other decay pool inlets 14 are all in a closed state. The liquid level measurement module 26 determines the volume of waste liquid injected into the decay pool 11 in real time. When the injected waste liquid reaches the set value, the central control module 21 controls the solenoid valve of the first decay pool inlet 14 to close, and the central control module 21 controls the solenoid valve of the coagulant addition port 15 to open. The coagulant addition module 211 adds coagulant into the decay pool 11, and the cleaning module 22 stirs the coagulant and the waste liquid, and scrapes off the precipitate stuck to the inner wall of the decay pool 11 during the last precipitation. At the same time, the waste liquid is discharged into the second high-radioactive decay pool 11 or the low-radioactive decay pool 11 through the solenoid valve of the second decay pool inlet 14. Pool 11, repeat the above operation, when the last decay pool 11 is injected with waste liquid, the central control module 21 controls the first sampling port 17 solenoid valve to open, the sampling module 28 samples and detects the waste liquid in the first decay pool 11, when it reaches the discharge standard, the central control module 21 controls the waste liquid discharge port 19 solenoid valve to open, and discharges the waste liquid in the decay pool 11, when the liquid level measurement module 26 detects that the waste water in the first decay pool is emptied, the central control module 21 controls the sedimentation discharge port 18 solenoid valve to open, and discharges the sediment in the decay pool 11, when the liquid level measurement module 26 detects that the waste liquid in the last decay pool 11 reaches the set control liquid level, the central control module 21 closes the last decay pool inlet 14 solenoid valve, and opens the first decay pool inlet 14 solenoid valve at the same time, injects waste liquid into the first decay pool 11, and circulates in sequence.

[0047] The cleaning module 22 includes a driving module 221 for driving a stirring module 222 , a stirring module 222 for stirring a coagulant and waste liquid, and a scraper module 223 for scraping off sediment on the inner wall of the decay tank 11 . The stirring module 222 is connected to the driving module 221 , and the scraper module 223 is connected to the stirring module 222 .

[0048] The driving module 221 is connected to the central control module 21 .

[0049] During cleaning, the central control module 21 controls the driving module 221 to start, and the driving module 221 drives the stirring module 222 to rotate to stir the coagulant and the waste liquid to accelerate the formation speed of the precipitate. The stirring module 222 drives the scraper module 223 to rotate to scrape off the precipitate stuck to the inner wall of the decay tank 11 during the last precipitation.

[0050] The protection module includes an exhaust module 23 for controlling the solenoid valve of the exhaust port 16, a seismic sensing module 25 for detecting whether an earthquake or vibration occurs, and a valve control module 24 for controlling the valve 13. The valve control module 24 is connected to the valve 13, and the exhaust module 23, the valve control module 24 and the seismic sensing module 25 are all connected to the central control module 21.

[0051] The earthquake sensing module 25 detects whether an earthquake or vibration occurs and transmits the result to the central control module 21. The central control module 21 makes a judgment. When no vibration occurs, the valve control module 24 and the valve 13 do not work. The exhaust module 23 controls the exhaust port 16 solenoid valve to open regularly to discharge the gas in the decay pool 11. When vibration occurs, the valve control module 24 controls the valve 13 to open, and the waste liquid in the decay pool 11 with more waste liquid is discharged into the decay pool 11 with less waste liquid, so as to prevent the waste liquid in the decay pool 11 from shaking and hitting the inner wall of the decay pool 11, thereby causing damage. At the same time, the exhaust module 23 controls the exhaust port 16 solenoid valve to open to discharge the gas in the decay pool 11, thereby reducing the pressure in the decay pool 11.

[0052] Preferably, the activity measurement module 27 is a pipeline wastewater radioactivity detector.

[0053] Example 2

[0054] like Figure 1-3 As shown, as a preferred embodiment of the present utility model, preferably, the liquid level measurement module 26 is a non-contact radar level meter.

[0055] Example 3

[0056] like Figure 1-3 As shown, as a preferred embodiment of the present utility model, preferably, the lower part of the decay pool 11 is inverted cone shape.

[0057] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function, characterized in that: The invention comprises a decay cell module (1); The decay pool module (1) comprises a decay pool (11), a partition (12), a valve (13), a decay pool inlet (14), a coagulant addition port (15), an exhaust port (16), a sampling port (17), a sedimentation outlet (18) and a waste liquid outlet (19), there are at least four decay pools (11), the decay pools (11) comprise a high-radioactivity decay pool and a low-radioactivity decay pool, a partition (12) is arranged between two adjacent decay pools (11), a valve (13) is installed on the partition (12), and the valve (13) is connected to the control module ( 2) connection, the upper end of the decay pool (11) is fixedly connected with a decay pool inlet (14), a coagulant addition port (15) and an exhaust port (16), and electromagnetic valves are fixedly installed on the decay pool inlet (14), the coagulant addition port (15) and the exhaust port (16), the lower end of the decay pool (11) is fixedly connected with a sampling port (17) and a sedimentation outlet (18), the front side of the lower end of the decay pool (11) is fixedly connected with a waste liquid outlet (19), and the sampling port (17), the sedimentation outlet (18) and the waste liquid outlet (19) are fixedly connected with electromagnetic valves; It also includes a control module (2).

2. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 1 is characterized in that: The control module (2) comprises a central control module (21), a cleaning module (22) for cleaning the inner wall of the decay pool (11) and stirring, a protection module for protecting the decay pool (11), a liquid level measurement module (26) for measuring the liquid level in the decay pool (11), an activity measurement module (27) for detecting the radioactive activity value of the waste liquid, a sampling module (28) for sampling, an alarm module (29) for alarming, an air concentration detection module (210) for detecting the radioactive concentration in the air, and a coagulant adding module (211) for adding a coagulant. The cleaning module (22), the protection module, the liquid level measurement module (26), the activity measurement module (27), the sampling module (28), the alarm module (29), the air concentration detection module (210), and the coagulant adding module (211) are all connected to the central control module (21).

3. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 2 is characterized in that: The activity measurement module (27) is fixedly mounted on the connecting pipe, and the connecting pipe is connected to the decay pool inlet (14).

4. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 3 is characterized in that: The liquid level measurement module (26) is fixedly installed above the inner wall of the decay tank (11).

5. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 4 is characterized in that: The cleaning module (22) comprises a driving module (221) for driving a stirring module (222), a stirring module (222) for stirring a coagulant and waste liquid, and a scraper module (223) for scraping off sediments on the inner wall of the decay tank (11); the stirring module (222) is connected to the driving module (221), and the scraper module (223) is connected to the stirring module (222).

6. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 5 is characterized in that: The driving module (221) is connected to the central control module (21).

7. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 6 is characterized in that: The protection module comprises an exhaust module (23) for controlling the electromagnetic valve of the exhaust port (16), a seismic sensing module (25) for detecting whether an earthquake or vibration occurs, and a valve control module (24) for controlling the valve (13), wherein the valve control module (24) is connected to the valve (13), and the exhaust module (23), the valve control module (24) and the seismic sensing module (25) are all connected to the central control module (21).

8. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 7 is characterized in that: The activity measurement module (27) is a pipeline type wastewater radioactivity detector.

9. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 8 is characterized in that: The liquid level measurement module (26) is a non-contact radar liquid level meter.

10. The radioactive waste liquid decay pool automatic control system with sedimentation and cleaning function according to claim 9 is characterized in that: The lower part of the decay pool (11) is in an inverted cone shape.

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