A medical radioactive wastewater decay pool

Abstract

The utility model relates to the field of medical radioactive wastewater treatment, and discloses a medical radioactive wastewater decay pool, comprising a protective shell, wherein the upper side of the protective shell is fixedly connected with a sedimentation tank, one side of the sedimentation tank is connected with a water inlet pipe, the upper side of the sedimentation tank is fixedly connected with a fixed plate, one side of the fixed plate is slidably connected with a sliding sleeve, the lower side of the sliding sleeve is slidably connected with a limiting plate, the lower side of the limiting plate is fixedly connected with a connecting pipe, the lower end of the connecting pipe is connected with a funnel, one side of the funnel is provided with an electromagnetic valve control component, and one side of the sedimentation tank is provided with a funnel driving mechanism for moving the funnel back and forth. The utility model can significantly remove the content of radioactive elements in wastewater by fully spreading a flocculant for precipitating radioactive elements through a funnel that can move in the sedimentation tank, and has high practicality.

Description

Technical Field

[0001] The utility model relates to the technical field of medical radioactive wastewater treatment, in particular to a medical radioactive wastewater decay pool. Background Art

[0002] According to national standards, nuclear medicine workplaces should be equipped with trough-type or plug-flow radioactive waste liquid decay pools or special containers to collect radioactive waste liquids generated in radiopharmaceutical operation rooms, nuclide therapy wards, patient toilets after medication, sanitary passage rooms, and other places, as well as radioactive waste liquids generated by cleaning during emergency accidents. Decay pools are containers used to collect, store, and discharge radioactive waste liquids. The radioactive waste liquid decays naturally in the container. After sufficient decay, it can be discharged only after it is tested and reaches the radioactive wastewater discharge limit.

[0003] Most of the existing decay pools store radioactive waste liquid in the decay pool for natural decay to reduce the concentration of radioactive elements in the wastewater. However, the decay of radioactive elements is a quantum behavior, which is random and unpredictable. The half-life of radioactive elements in medical wastewater often takes days or months. When the hospital's radioactive wastewater increases significantly, the hospital may not have enough decay pools to use. In view of this, a decay pool that uses chemical deposition to accelerate the removal of radioactive element concentrations in wastewater is proposed, thereby improving the efficiency of the decay pool in treating radioactive wastewater. Utility Model Content

[0004] In order to solve the technical problem of medical radioactive wastewater decay pool, the utility model provides a medical radioactive wastewater decay pool.

[0005] The utility model is implemented by the following technical scheme: a medical radioactive wastewater decay pool comprises a protective shell, the upper side of the protective shell is fixedly connected with a sedimentation tank, one side of the sedimentation tank is connected with a water inlet pipe, the upper side of the sedimentation tank is fixedly connected with a fixed plate, one side of the fixed plate is slidably connected with a sliding sleeve, the lower side of the sliding sleeve is slidably connected with a limiting plate, the lower side of the limiting plate is fixedly connected with a connecting pipe, the lower end of the connecting pipe is connected with a funnel, one side of the funnel is provided with an electromagnetic valve control component, one side of the sedimentation tank is provided with a funnel driving mechanism for moving the funnel back and forth, the upper side of the sliding sleeve is provided with a reagent feeding mechanism for adding chemical reagents into radioactive wastewater, the lower side of the limiting plate is provided with a reagent stirring mechanism for stirring and mixing chemical reagents in the sedimentation tank, and the lower side of the sedimentation tank is provided with a solid filtering mechanism for filtering and removing generated radioactive solid precipitates.

[0006] As a further improvement of the above scheme, the funnel driving mechanism includes a servo motor fixedly connected to one side of the protective shell, the output shaft of the servo motor is fixedly connected to a threaded rod threadedly sleeved on one side of the sleeve, and one side of the sleeve is provided with a left and right driving mechanism for making the funnel reciprocate left and right.

[0007] As a further improvement of the above scheme, the left and right driving mechanism includes a curved groove opened on the fixed plate, a limiting groove is opened on the lower side of the sliding sleeve, and the outer side of the connecting pipe is slidably connected to the inner side of the limiting groove and the curved groove at the same time.

[0008] As a further improvement of the above scheme, the reagent feeding mechanism includes a chemical reagent barrel fixedly connected to the upper side of the sliding sleeve, the upper side of the chemical reagent barrel is provided with an addition port, the upper side of the sliding sleeve is provided with a notch, the lower side of the chemical reagent barrel is connected with a corrugated hose, and the corrugated hose passes through the notch and is connected to the upper end of the connecting pipe.

[0009] As a further improvement of the above solution, the reagent stirring mechanism includes a plurality of rotating rods rotatably connected to the lower side of the limiting plate, and the lower ends of the plurality of rotating rods are provided with spiral blades, and the plurality of spiral blades are symmetrically distributed around the funnel as the center.

[0010] As a further improvement of the above scheme, the solid filtering mechanism includes a sealing groove fixedly connected to the lower side of the sedimentation tank, a decay tank is arranged between the sealing groove and the protective shell, one side of the decay tank is connected to a drain pipe, a filter assembly is fixedly connected to the lower side of the sealing groove, a sewage isolation mechanism for isolating the radioactive sewage in the sedimentation tank from the decay tank is arranged on one side of the protective shell, and a sediment collection mechanism for collecting the radioactive solid sediment filtered on the surface of the filter assembly is arranged on one side of the protective shell.

[0011] As a further improvement of the above scheme, the sewage isolation mechanism includes a hydraulic cylinder fixedly connected to one side of the protective shell, and the output end of the hydraulic cylinder is fixedly connected to a waterproof plate slidably connected to the inner side of the sealing groove, and the waterproof plate abuts against the upper side of the filter assembly.

[0012] As a further improvement of the above scheme, the sediment collection mechanism includes a notch opened on the outside of the sedimentation tank, a lower hopper is provided on the lower side of the notch, and a radiation collection bucket that cooperates with the lower end of the lower hopper is fixedly connected to the bottom side of the protective shell.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The utility model cooperates with a chemical reagent barrel, a funnel driving mechanism, a plurality of spiral blades and a rotating rod to add a suitable flocculant to the chemical reagent barrel, and then precipitate with trace radioactive nuclides in the wastewater, transfer and concentrate the radioactive nuclides into a small volume of sedimentation sludge, and then discharge it through the lower hopper, which can greatly reduce the concentration of radioactive elements in the wastewater in advance, which is conducive to the sewage after discharge being close to the national emission standards.

[0015] 2. The utility model can discharge the concentrated and enriched radioactive sediment from the lower hopper through the cooperation of the sediment collection mechanism and the sewage isolation mechanism, and the radioactive sediment can be directly collected by the radiation collection bucket, and the filtered trace wastewater can be directly injected into the decay pool through the filter assembly, which has the characteristics of quick separation, obvious effect and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A front view of a medical radioactive wastewater decay pool provided by the utility model;

[0017] Figure 2 A first cross-sectional view of a medical radioactive wastewater decay pool provided by the utility model;

[0018] Figure 3 for Figure 2 Side view of

[0019] Figure 4 A second cross-sectional view of a medical radioactive wastewater decay pool provided by the utility model;

[0020] Figure 5 for Figure 4 Side view of

[0021] Figure 6 for Figure 4 A front view of

[0022] Figure 7 for Figure 5 Schematic diagram of the structure enlarged at point A in the middle.

[0023] Description of main symbols:

[0024] 1. Protective shell; 2. Water inlet pipe; 3. Hydraulic cylinder; 4. Servo motor; 5. Decay tank; 6. Limit plate; 7. Spiral blade; 8. Radiation collection barrel; 9. Lower hopper; 10. Notch; 11. Sleeve; 12. Chemical reagent barrel; 13. Sedimentation tank; 14. Curved groove; 15. Fixed plate; 16. Threaded rod; 17. Filter assembly; 18. Drain pipe; 19. Waterproof board; 20. Limit groove; 21. Rotating rod; 22. Funnel; 23. Sealing groove; 24. Connecting pipe; 25. Corrugated hose. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0026] Example:

[0027] Please combine Figure 1-Figure 7 A medical radioactive wastewater decay pool of the present embodiment includes a protective shell 1, which is made of a stainless steel plate. A sedimentation tank 13 is fixedly connected to the upper side of the protective shell 1, and a water inlet pipe 2 is connected to one side of the sedimentation tank 13. A fixed plate 15 is fixedly connected to the upper side of the sedimentation tank 13, and a sliding sleeve 11 is slidably connected to one side of the fixed plate 15. A limit plate 6 is slidably connected to the lower side of the sliding sleeve 11, and a connecting pipe 24 is fixedly connected to the lower side of the limit plate 6. The lower end of the connecting pipe 24 is connected to a funnel 22. A solenoid valve control component is provided on one side of the funnel 22, and the feeding of the reagent can be controlled by the solenoid valve control component. A funnel driving mechanism for moving the funnel 22 forward and backward is provided on one side of the sedimentation tank 13. A reagent feeding mechanism for adding chemical reagents into the radioactive wastewater is provided on the upper side of the sliding sleeve 11. A reagent stirring mechanism for stirring and mixing chemical reagents in the sedimentation tank 13 is provided below the limit plate 6. A solid filtering mechanism for filtering and removing generated radioactive solid precipitates is provided on the lower side of the sedimentation tank 13.

[0028] Please combine Figure 1 , Figure 4 , Figure 6 and Figure 7 As shown, the funnel driving mechanism includes a servo motor 4 fixedly connected to one side of the protective shell 1, and the output shaft of the servo motor 4 is fixedly connected to a threaded rod 16 threadedly sleeved on one side of the sliding sleeve 11. One side of the sliding sleeve 11 is provided with a left and right driving mechanism for making the funnel 22 reciprocate left and right.

[0029] Please combine Figure 2 As shown, the left and right driving mechanisms include a curved groove 14 opened on the fixed plate 15, a limiting groove 20 opened on the lower side of the sliding sleeve 11, and the outer side of the connecting pipe 24 is slidingly connected to the limiting groove 20 and the inner side of the curved groove 14 at the same time. It should be particularly noted that the uppermost end of the connecting pipe 24 is higher than the upper surface of the curved groove 14, but lower than the upper lower surface of the sliding sleeve 11.

[0030] Please combine Figure 2As shown, the reagent feeding mechanism includes a chemical reagent barrel 12 fixedly connected to the upper side of the sliding sleeve 11. Chemical flocculants, such as potassium aluminum sulfate, sodium aluminate, ferric sulfate, ferric chloride, etc., are added to the chemical reagent barrel 12. Sometimes, coagulants such as active silica, clay, and polyelectrolytes are also added. After stirring, hydrolysis and flocculation occur, so that the colloidal substances in the wastewater lose stability and condense into fine precipitable particles. The radioactive nuclides in the wastewater co-crystallize and co-precipitate, or enter the sedimentation slurry after being flocculated and adsorbed by the colloid, so as to achieve the purpose of separating, decontaminating, and concentrating the waste liquid. An addition port is provided on the upper side of the chemical reagent barrel 12, a notch is provided on the upper side of the sliding sleeve 11, and a corrugated hose 25 is connected to the lower side of the chemical reagent barrel 12. The corrugated hose 25 is made of special material and has excellent ductility, toughness and corrosion resistance. The corrugated hose 25 passes through the notch and is connected to the upper end of the connecting pipe 24.

[0031] Please combine Figure 6 As shown, the reagent stirring mechanism includes two rotating rods 21 rotatably connected to the lower side of the limiting plate 6, and the lower ends of the two rotating rods 21 are provided with spiral blades 7. The two spiral blades 7 are symmetrically distributed around the funnel 22 as the center. The number of spiral blades 7 can be adjusted according to the specific hospital site and the daily radioactive wastewater treatment volume. It is recommended that the number of spiral blades 7 should be no less than 2, and preferably more than 4, so that the stirring effect of the wastewater is better under the condition of compound movement.

[0032] Please combine Figure 6 As shown, the solid filtering mechanism includes a sealing groove 23 fixedly connected to the lower side of the sedimentation tank 13, a sealing and waterproof structure is arranged between the sealing groove 23 and the waterproof plate 19, a decay tank 5 is arranged between the sealing groove 23 and the protective shell 1, the volume of the sedimentation tank 13 is much smaller than the volume of the decay tank 5, one side of the decay tank 5 is connected to a drain pipe 18, the lower side of the sealing groove 23 is fixedly connected to a filter assembly 17, one side of the protective shell 1 is provided with a sewage isolation mechanism for isolating the radioactive sewage in the sedimentation tank 13 from the decay tank 5, and one side of the protective shell 1 is provided with a sediment collection mechanism for collecting the radioactive solid sediment filtered on the surface of the filter assembly 17.

[0033] Please combine Figure 4 , Figure 5 and Figure 6 As shown, the sewage isolation mechanism includes a hydraulic cylinder 3 fixedly connected to one side of the protective shell 1, and the output end of the hydraulic cylinder 3 is fixedly connected to a waterproof plate 19 slidably connected to the inner side of the sealing groove 23, and the waterproof plate 19 abuts against the upper side of the filter assembly 17.

[0034] Please combine Figure 1 and Figure 3As shown, the sediment collection mechanism includes a notch 10 opened on the outside of the sedimentation tank 13, a lower hopper 9 is arranged on the lower side of the notch 10, a radiation collection barrel 8 matched with the lower end of the lower hopper 9 is fixedly connected to the bottom side of the protective shell 1, and a secret door is designed at the protective shell 1 near the radiation collection barrel 8 for the convenience of the staff to access the radiation collection barrel 8.

[0035] The implementation principle of a medical radioactive wastewater decay pool in the embodiment of the present application is as follows: a flocculant specially used for absorbing and precipitating radioactive elements, such as potassium aluminum sulfate, sodium aluminate, iron sulfate, iron chloride, etc., is added to a chemical reagent barrel 12, and a coagulant aid, active silica, clay, polymer electrolyte, etc., is also added. After stirring, hydrolysis and flocculation occur, which can make the colloidal substances in the wastewater lose stability and condense into fine precipitable particles. The hydraulic cylinder 3 is started to push out the waterproof plate 19 in the sealing groove 23 and separate it from the decay pool 5. The radioactive wastewater is injected into the sedimentation tank 13 from the water inlet pipe 2, and then the servo motor 4 is started to drive the threaded rod 16 to rotate, pushing the sliding sleeve 11 along the fixed The plate 15 moves forward, and the connecting pipe 24 is limited by the curved groove 14 and the limit groove 20, so that the connecting pipe 24 and the funnel 22 swing left and right. During this period, the flocculant falls into the wastewater along the corrugated hose 25. Under the left and right pushing action of the limit plate 6, the spiral blade 7 changes direction and rotates along the rotating rod 21 under the reverse thrust of the water flow, and the wastewater and the flocculant are fully mixed to form a precipitate. At this time, the waterproof plate 19 is retracted, and the wastewater flows into the decay tank 5 along the filter assembly 17, and the solid precipitate containing radioactive elements is filtered on the surface of the filter assembly 17. When the waterproof plate 19 is pushed out next time, the precipitate is pushed to the notch 10 and enters the radiation collection barrel 8 along the lower hopper 9.

[0036] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A medical radioactive wastewater decay pool, comprising a protective shell (1), characterized in that: The upper side of the protective shell (1) is fixedly connected to a sedimentation tank (13), one side of the sedimentation tank (13) is connected to a water inlet pipe (2), the upper side of the sedimentation tank (13) is fixedly connected to a fixing plate (15), one side of the fixing plate (15) is slidably connected to a sliding sleeve (11), the lower side of the sliding sleeve (11) is slidably connected to a limiting plate (6), the lower side of the limiting plate (6) is fixedly connected to a connecting pipe (24), the lower end of the connecting pipe (24) is connected to a funnel (22), and the funnel ( A solenoid valve control assembly is arranged on one side of the sedimentation tank (13), a funnel driving mechanism for moving the funnel (22) forward and backward is arranged on one side of the sedimentation tank (13), a reagent feeding mechanism for adding chemical reagents into radioactive wastewater is arranged on the upper side of the sliding sleeve (11), a reagent stirring mechanism for stirring and mixing chemical reagents in the sedimentation tank (13) is arranged below the limit plate (6), and a solid filtering mechanism for filtering and removing generated radioactive solid precipitates is arranged on the lower side of the sedimentation tank (13).

2. A medical radioactive wastewater decay pool as claimed in claim 1, characterized in that: The funnel drive mechanism comprises a servo motor (4) fixedly connected to one side of the protective shell (1); an output shaft of the servo motor (4) is fixedly connected to a threaded rod (16) threadedly sleeved on one side of a sliding sleeve (11); and a left-right drive mechanism for causing the funnel (22) to reciprocate left and right is provided on one side of the sliding sleeve (11).

3. A medical radioactive wastewater decay pool as claimed in claim 2, characterized in that: The left and right driving mechanism comprises a curved groove (14) provided on a fixed plate (15), a limiting groove (20) provided on the lower side of the sliding sleeve (11), and the outer side of the connecting pipe (24) is slidably connected to the limiting groove (20) and the inner side of the curved groove (14) at the same time.

4. A medical radioactive wastewater decay pool as claimed in claim 1, characterized in that: The reagent feeding mechanism comprises a chemical reagent barrel (12) fixedly connected to the upper side of the sliding sleeve (11); the upper side of the chemical reagent barrel (12) is provided with a adding port; the upper side of the sliding sleeve (11) is provided with a notch; the lower side of the chemical reagent barrel (12) is connected with a corrugated hose (25); the corrugated hose (25) passes through the notch and is connected with the upper end of the connecting pipe (24).

5. A medical radioactive wastewater decay pool as claimed in claim 1, characterized in that: The reagent stirring mechanism comprises a plurality of rotating rods (21) rotatably connected to the lower side of the limiting plate (6), the lower ends of the plurality of rotating rods (21) are provided with spiral blades (7), and the plurality of spiral blades (7) are symmetrically distributed around a circle with the funnel (22) as the center.

6. A medical radioactive wastewater decay pool as claimed in claim 1, characterized in that: The solid filtering mechanism comprises a sealing groove (23) fixedly connected to the lower side of the sedimentation tank (13); a decay tank (5) is arranged between the sealing groove (23) and the protective shell (1); one side of the decay tank (5) is connected to a drain pipe (18); the lower side of the sealing groove (23) is fixedly connected to a filter assembly (17); one side of the protective shell (1) is provided with a sewage isolation mechanism for isolating the radioactive sewage in the sedimentation tank (13) from the decay tank (5); and one side of the protective shell (1) is provided with a sediment collection mechanism for collecting radioactive solid sediment filtered on the surface of the filter assembly (17).

7. A medical radioactive wastewater decay pool as claimed in claim 6, characterized in that: The sewage isolation mechanism comprises a hydraulic cylinder (3) fixedly connected to one side of the protective shell (1); an output end of the hydraulic cylinder (3) is fixedly connected to a waterproof plate (19) slidably connected to the inner side of the sealing groove (23); and the waterproof plate (19) abuts against the upper side of the filter assembly (17).

8. A medical radioactive wastewater decay pool as claimed in claim 7, characterized in that: The sediment collection mechanism comprises a notch (10) opened on the outside of the sedimentation tank (13), a lower hopper (9) is arranged at the lower side of the notch (10), and a radiation collection bucket (8) matched with the lower end of the lower hopper (9) is fixedly connected to the bottom side of the protective shell (1).

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