A radioactive resin treatment apparatus and method

Abstract

The application provides a radioactive resin treatment device and method, relates to the technical field of radioactive resin treatment, and comprises a drying chamber, a revolution driving mechanism, a rotation driving mechanism, an adapting mechanism and a self-cleaning spiral mechanism. The side wall of the drying chamber is provided with a heating inner wall for heating radioactive resin. The rotation driving mechanism and the revolution driving mechanism are connected with the self-cleaning spiral mechanism through the adapting mechanism. The self-cleaning spiral mechanism comprises spiral blades and cleaning members fixed on the edges of the spiral blades. The rotation driving mechanism drives the self-cleaning spiral mechanism to rotate around its own axis, so as to agitate the radioactive resin or make the cleaning members adhere to the heating inner wall through the rotation centrifugal force, and remove the resin carbonization layer through the knocking and friction effect. The revolution driving mechanism drives the self-cleaning spiral mechanism to revolve around the central axis of the drying chamber. The application can realize efficient cleaning of the resin carbonization layer in the drying process of the radioactive resin, and improves the drying efficiency of the radioactive resin.

Description

Technical Field

[0001] This invention relates to the field of radioactive resin treatment technology, and more specifically, to a radioactive resin treatment apparatus and method. Background Technology

[0002] During the operation of nuclear power plants, waste resin, due to its radioactivity, requires drying treatment using a nuclear-grade resin conical dryer. This dryer primarily uses hot oil heating, transferring heat to the inner wall of the dryer and further to the resin, thus achieving drying. However, during long-term operation, the resin at high temperatures easily forms a carbonized layer on the inner wall of the dryer. This carbonized layer is not only viscous but also quite thick, severely hindering heat transfer. This leads to a gradual decrease in the drying efficiency of the nuclear-grade resin conical dryer and a continuous increase in energy consumption.

[0003] Currently, nuclear resin conical dryers are typically designed with a water spray cleaning function to remove the resin carbonization layer on the inner wall through rinsing. However, when the resin carbonization layer is thick and highly adhesive, water spraying alone is insufficient for effective removal, resulting in poor cleaning performance. Summary of the Invention

[0004] The problem addressed by this invention is how to achieve efficient cleaning of the carbonized resin layer during the drying process of radioactive resin.

[0005] To address the above problems, the present invention provides a radioactive resin treatment apparatus and method.

[0006] On one hand, the present invention provides a radioactive resin treatment device, including a drying chamber, a revolution drive mechanism, a rotation drive mechanism, an adapter mechanism, and a self-cleaning spiral mechanism. The side wall of the drying chamber is provided with a heating inner wall for heating the radioactive resin. The self-cleaning spiral mechanism is located in the drying chamber. The rotation drive mechanism and the revolution drive mechanism are connected to the self-cleaning spiral mechanism through the adapter mechanism. The self-cleaning spiral mechanism includes spiral blades and a cleaning component fixed to the edge of the spiral blades.

[0007] The self-rotation drive mechanism is used to drive the self-cleaning spiral mechanism to rotate around the axis of the self-cleaning spiral mechanism to agitate the radioactive resin, or to make the cleaning component adhere to the heating inner wall by the centrifugal force of rotation, so as to remove the resin carbonization layer on the heating inner wall by the cleaning component striking and / or by friction. The revolution drive mechanism is used to drive the self-cleaning spiral mechanism to revolve around the central axis of the drying chamber.

[0008] Optionally, the cleaning component maintains a safe distance from the heated inner wall when stationary, and adheres to the heated inner wall using centrifugal force when the self-cleaning spiral mechanism rotates.

[0009] Optionally, the adapter mechanism is a gear axial transmission mechanism, and the self-cleaning spiral mechanism further includes a mounting flange and a rotating shaft. The mounting flange is fixedly connected to one end of the rotating shaft. The rotating shaft is connected to the self-rotation drive mechanism through the gear axial transmission mechanism. The gear axial transmission mechanism transmits driving power to the rotating shaft through the mounting flange, so that the rotating shaft drives the spiral blades to rotate. The spiral blades are fixed on the rotating shaft and are spirally distributed along the axial direction of the rotating shaft, and the pitch of the spiral blades is the same along the axial direction of the rotating shaft.

[0010] Optionally, the cleaning component is a cleaning ring, and the edge of the spiral blade is provided with a plurality of holes for installing the cleaning ring. Each hole corresponds to a cleaning ring, and the cleaning ring is rotatably installed on the edge of the spiral blade through the holes.

[0011] Optionally, the cleaning ring is a polygonal ring with a central opening, and the edge of the polygonal ring is a working surface that contacts the heated inner wall.

[0012] Optionally, the number of cleaning rings satisfies the following relationship:

[0013] n≥L / l;

[0014] Wherein, n represents the number of cleaning rings, L represents the axial length of the heated inner wall, and l represents the side length projection of the cleaning ring in the axial direction of the heated inner wall. The side length projection of the cleaning ring refers to the projection value of the edge of the cleaning ring along the axial direction of the heated inner wall.

[0015] Optionally, the arrangement length of the cleaning ring is the same as the axial length of the heated inner wall. The arrangement length refers to the total length of the cleaning ring along the spiral blade in the axial direction of the heated inner wall. The cleaning ring is evenly spaced on the edge of the rotating blade and is continuously arranged in the axial direction.

[0016] Optionally, the radioactive resin treatment device is configured to have a static state, a stirring state, and a cleaning state;

[0017] In the static state, the cleaning ring hangs down naturally and rests against the edge of the hole in the spiral blade, and the self-cleaning spiral mechanism maintains a safe distance from the heated inner wall;

[0018] In the stirring state, the self-rotation drive mechanism operates at a first speed range, driving the self-cleaning spiral mechanism to rotate, thereby shortening the safe distance between the cleaning ring and the heated inner wall / or making the cleaning ring and the heated inner wall slightly contact, so as to stir the radioactive resin between the spiral blades and the heated inner wall. At the same time, the revolution drive mechanism drives the self-cleaning spiral mechanism to revolve around the central axis of the drying chamber.

[0019] In the clean state, the self-rotation drive mechanism operates at a second speed range, driving the self-cleaning spiral mechanism to rotate, so that the cleaning ring is in contact with the inner wall of the heating, so as to remove the resin carbonization layer on the inner wall of the heating through knocking and friction. At the same time, the revolution drive mechanism drives the self-cleaning spiral mechanism to rotate around the inner wall of the heating.

[0020] The maximum value of the first speed range is less than the minimum value of the second speed range.

[0021] On the other hand, the present invention provides a method for treating radioactive resin, using any of the above-mentioned radioactive resin treatment apparatus, comprising:

[0022] S11. Inject radioactive resin into the drying chamber, heat the inner wall of the drying chamber through the hot oil heating pipe, start the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, control the self-rotation drive mechanism to operate within the first speed range, so that the self-cleaning spiral structure rotates clockwise around its own axis and agitates the radioactive resin.

[0023] S12. After the agitation of the radioactive resin is completed, the rotation drive mechanism is periodically controlled to operate within the second speed range, so that the cleaning ring in the self-cleaning spiral structure is attached to the heated inner wall of the drying chamber under the action of centrifugal force of rotation. The revolution drive mechanism is started, so that the self-cleaning spiral structure rotates at least one revolution along the heated inner wall. Then, the rotation drive mechanism is adjusted to operate within the first speed range to complete the drying of the radioactive resin.

[0024] The maximum value of the first speed range is less than the minimum value of the second speed range.

[0025] Optionally, after the radioactive resin has dried, it further includes:

[0026] S13. Stop the hot oil circulation in the hot oil heating pipeline, open the discharge ball valve, control the self-rotation drive mechanism to run within the first speed range, so that the self-cleaning spiral mechanism reverses around its own axis, so as to transport the dried radioactive resin to the discharge port and discharge it from the drying chamber.

[0027] S14. After the material is discharged, close the discharge ball valve, control the self-rotation drive mechanism to run within the second speed range, so that the self-cleaning spiral mechanism reverses around its own axis, and at the same time start the revolution drive mechanism to make the self-cleaning spiral structure rotate at least one revolution along the inner wall of the heating unit, and start the flushing water pipeline to remove the residue on the inner wall of the dryer.

[0028] Compared to existing technologies, the beneficial effects of the radioactive resin treatment device of this invention are as follows: Through the coordinated transmission of the rotation drive mechanism and the revolution drive mechanism, the self-cleaning spiral mechanism can simultaneously achieve rotation and revolution, wherein the self-cleaning spiral mechanism consists of spiral blades and cleaning components. During the drying process, the spiral blades dynamically agitate the radioactive resin through rotation, preventing resin accumulation and localized overheating. Simultaneously, the revolution ensures the uniform distribution of the radioactive resin within the drying chamber, achieving comprehensive heating and efficient drying. During the cleaning process, the cleaning component utilizes the centrifugal force generated by rotation to adhere to the heated inner wall, efficiently removing the resin carbonization layer adhering to the heated inner wall through the striking and frictional action of its edges. The revolution of the cleaning component further ensures coverage of the entire heated inner wall, avoiding blind spots and maintaining the heat conduction efficiency of the heated inner wall. The coordinated design of the adapter mechanism ensures the stability and precise power transmission of the self-cleaning spiral mechanism during rotation and revolution, thereby achieving efficient drying of the radioactive resin and deep cleaning of the resin carbonization layer, improving equipment operating efficiency and service life. This invention enables efficient cleaning of the carbonized layer of the resin during the drying process of radioactive resin, thereby improving the drying efficiency of radioactive resin. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a radioactive resin treatment device according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the self-cleaning spiral mechanism in a radioactive resin treatment device according to an embodiment of the present invention.

[0031] Figure 3 This is a schematic diagram of the self-cleaning spiral mechanism in a radioactive resin treatment device according to an embodiment of the present invention from another perspective.

[0032] Figures 4a-4c This is a schematic diagram of the self-cleaning spiral mechanism AA in different states in an embodiment of the present invention for a radioactive resin treatment device.

[0033] Figure 5 This is a schematic flowchart of a radioactive resin treatment method according to an embodiment of the present invention;

[0034] Figure 6This is a schematic flowchart of a radioactive resin treatment method according to another embodiment of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Drying chamber; 11-Heated inner wall; 2-Revolution drive mechanism; 3-Rotation drive mechanism; 4-Adaptor mechanism; 5-Self-cleaning spiral mechanism; 51-Spiral blade; 52-Cleaning ring; 53-Mounting flange; 54-Rotating shaft; 6-Resin carbonization layer. Detailed Implementation

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0039] Nuclear power plants generate a large amount of waste resin annually, primarily originating from ion exchange resins used for water purification. Over long-term use, these resins adsorb radioactive substances, thus acquiring a degree of radioactivity. Drying and reducing the volume of this radioactive resin before permanent storage not only effectively reduces the volume of radioactive waste and saves storage space but also enhances the safety of nuclear waste, making it one of the current options for nuclear waste treatment. The nuclear resin conical dryer, as a core piece of equipment in the drying and volume reduction process, directly impacts the treatment efficiency of the radioactive resin through its performance and functionality.

[0040] Currently, nuclear resin conical dryers primarily dry the inner wall of the drying chamber by heating it with hot oil, and then transferring heat to the radioactive resin through heat conduction. However, after prolonged exposure to heat, a hard and viscous carbonized layer of the radioactive resin near the heated inner wall tends to form on the inner wall of the drying chamber.

[0041] As the equipment operates for an extended period, the resin carbonization layer gradually thickens, and its cumulative effect significantly impacts the heating efficiency of the radioactive resin. On one hand, the presence of the carbonized resin layer hinders heat transfer from the inner heating wall to the waste resin, leading to reduced heating efficiency and prolonged drying time. On the other hand, the energy consumption of the nuclear-grade resin conical dryer increases, affecting its operational economy. Furthermore, the presence of the carbonized resin layer may increase the operating load of the nuclear-grade resin conical dryer, accelerating equipment aging and shortening its service life. Because the radioactive resin itself is radioactive, and the operating environment of the nuclear-grade resin conical dryer is in an area with high radiation protection requirements, the resin carbonization layer cannot be removed manually. Currently, nuclear-grade resin conical dryers are typically equipped with a water spray rinsing function to remove loose radioactive resin adhering to the inner heating wall. However, the water spray rinsing function has limited effectiveness against the already formed resin carbonization layer, especially since the resin carbonization layer is hard and has strong adhesion, making effective removal difficult with conventional rinsing methods. Therefore, the resin carbonization layer gradually accumulates on the inner wall of the heating element, causing the thermal efficiency and operating efficiency of the nuclear resin conical dryer to decline continuously, and the difficulty and cost of maintenance to increase continuously in the later stages.

[0042] Reference Figure 1 The present invention provides a radioactive resin treatment device, including a drying chamber 1, a revolution drive mechanism 2, a rotation drive mechanism 3, an adapter mechanism 4, and a self-cleaning spiral mechanism 5. The side wall of the drying chamber 1 is provided with a heating inner wall 11 for heating the radioactive resin. The self-cleaning spiral mechanism 5 is located inside the drying chamber 1. The rotation drive mechanism 3 and the revolution drive mechanism 2 are connected to the self-cleaning spiral mechanism 5 through the adapter mechanism 4. The self-cleaning spiral mechanism 5 includes a spiral blade 51 and a cleaning component fixed to the edge of the spiral blade 51.

[0043] It should be explained that the drying chamber 1 can be a conical sealed container with a heating inner wall 11 on its side wall for heating the radioactive resin. The heating method can be to use a hot oil circulation pipeline to uniformly heat part of the inner wall of the drying chamber 1.

[0044] The self-rotation drive mechanism 3 is used to drive the self-cleaning spiral mechanism 5 to rotate around the axis of the self-cleaning spiral mechanism 5 to agitate the radioactive resin, or to make the cleaning component adhere to the heated inner wall 11 by the centrifugal force of rotation, so as to remove the resin carbonization layer 6 on the heated inner wall 11 by the cleaning component striking and / or by friction. The revolution drive mechanism 2 is used to drive the self-cleaning spiral mechanism 5 to revolve around the central axis of the drying chamber 1.

[0045] Compared to existing technologies, the beneficial effects of the radioactive resin treatment device of the present invention are as follows: Through the coordinated transmission of the rotation drive mechanism 3 and the revolution drive mechanism 2, the self-cleaning spiral mechanism 5 can simultaneously achieve rotation and revolution, wherein the self-cleaning spiral mechanism 5 is composed of spiral blades 51 and cleaning components. During the drying process, the spiral blades 51 dynamically agitate the radioactive resin through rotation, preventing the accumulation of radioactive resin and local overheating. At the same time, the revolution ensures that the radioactive resin is evenly distributed in the drying chamber 1, achieving comprehensive heating and efficient drying. During the cleaning process, the cleaning component uses the centrifugal force generated by rotation to adhere to the heated inner wall 11, and efficiently removes the resin carbonization layer 6 adhering to the heated inner wall 11 through the knocking and friction action of its edges. The revolution of the cleaning component further ensures that it covers the entire heated inner wall 11, avoiding cleaning blind spots and maintaining the heat conduction efficiency of the heated inner wall 11. The coordinated design of the adapter mechanism 4 ensures the stability and precise power transmission of the self-cleaning spiral mechanism 5 during its rotation and revolution, thereby achieving efficient drying of the radioactive resin and deep cleaning of the resin carbonization layer 6, improving equipment operating efficiency and service life. This invention enables efficient cleaning of the resin carbonization layer 6 during the radioactive resin drying process, improving the drying efficiency of the radioactive resin.

[0046] In one embodiment, the cleaning component maintains a safe distance from the heated inner wall 11 when stationary, and abuts against the heated inner wall 11 by means of centrifugal force when the self-cleaning spiral mechanism 5 rotates.

[0047] Specifically, when the radioactive resin treatment device is stationary, the cleaning component hangs downwards under natural gravity, maintaining a safe distance from the heated inner wall 11 to avoid direct contact and prevent wear and damage that may occur during non-operation. When the self-cleaning spiral mechanism 5 is driven by the rotation drive mechanism 3 to rotate, the cleaning component is subjected to the centrifugal force generated by the rotation, gradually deflecting from its natural downward state and abutting against the heated inner wall 11. The magnitude of the centrifugal force can be adjusted with the rotation speed to ensure that the cleaning component can stably abut against the inner wall surface and maintain continuous contact. While abutting against the heated inner wall 11, the cleaning component generates friction on the surface of the heated inner wall 11 along with the rotation trajectory of the self-cleaning spiral mechanism 5, continuously removing the resin carbonization layer 6 adhering to the heated inner wall 11 through dynamic movement, thereby maintaining the stability of the radioactive resin treatment device during operation.

[0048] Reference Figure 2 and Figure 3The adapter mechanism 4 is a gear axial transmission mechanism. The self-cleaning spiral mechanism 5 also includes a mounting flange 53 and a rotating shaft 54. The mounting flange 53 is fixedly connected to one end of the rotating shaft 54. The rotating shaft 54 ​​is connected to the self-rotation drive mechanism 3 through the gear axial transmission mechanism. The gear axial transmission mechanism transmits driving power to the rotating shaft 54 ​​through the mounting flange 53, so that the rotating shaft 54 ​​drives the spiral blades 51 to rotate. The spiral blades 51 are fixed on the rotating shaft 54 ​​and are spirally distributed along the axial direction of the rotating shaft 54. The pitch of the spiral blades 51 is the same along the axial direction of the rotating shaft 54.

[0049] Specifically, the gear axial transmission mechanism connects the self-rotation drive mechanism 3, the revolution drive mechanism 2, and the self-cleaning spiral mechanism 5 to ensure the transmission of driving power and the stable operation of the self-cleaning spiral mechanism 5. The mounting flange 53 is fixedly connected to one end of the rotating shaft 54 ​​to reliably transmit the driving force from the gear axial transmission mechanism to the rotating shaft 54, thereby driving the rotating shaft 54 ​​to rotate stably. The spiral blades 51 are spirally distributed along the rotating shaft 54 ​​and fixedly connected to it, ensuring that the blades can rotate with the rotating shaft 54. To achieve uniform agitation of the radioactive resin, the pitch of the spiral blades 51 remains consistent along the axial direction of the rotating shaft 54, effectively propelling the radioactive resin forward during the rotation of the rotating shaft 54 ​​while preventing its accumulation and ensuring uniform heating, thus avoiding localized overheating. Simultaneously, the gear axial transmission mechanism provides precise power transmission, ensuring the stable operation of the rotating shaft 54 ​​and reducing vibration or energy loss caused by uneven driving.

[0050] Specifically, the self-rotation drive mechanism 3 and the revolution drive mechanism 2 can both be drive motors and can be located outside the drying chamber 1. One end of the gear axial transmission mechanism extends out of the drying chamber 1 and is connected to the self-rotation drive mechanism 3 and the revolution drive mechanism 2 respectively, while the other end extends into the drying chamber 1 and is connected to the self-cleaning spiral mechanism 5.

[0051] Furthermore, the gear axial transmission mechanism may include a self-rotating drive gear, a revolution drive gear, a self-rotating driven gear, a revolution distribution gear, a self-rotating transmission shaft, and a revolution transmission shaft.

[0052] The output shaft of the self-rotating drive mechanism 3 meshes with the driven gear via a self-rotating drive gear, and the axis of the self-rotating drive gear is coaxial with the output shaft of the self-rotating drive gear. The driven gear is connected to the self-cleaning screw mechanism 5 (which may be a mounting flange) via a self-rotating transmission shaft, and is used to transmit the self-rotating driving force to the self-cleaning screw mechanism 5.

[0053] The output shaft of the revolution drive mechanism 2 outputs power to the revolution distribution gear through the revolution drive gear. The revolution distribution gear is connected to the self-cleaning spiral mechanism 5 through the revolution transmission shaft to drive the entire self-cleaning spiral mechanism 5 to revolve around the central axis of the drying chamber 1.

[0054] The gear axial transmission mechanism includes two transmission paths. The rotational driving force of the self-rotating drive mechanism 3 can be transmitted to the rotating shaft 54 ​​via the mounting flange 53 to achieve the revolution of the self-cleaning spiral mechanism 5. The revolution driving force of the revolution drive mechanism 2 can be directly transmitted to the main frame of the self-cleaning spiral mechanism 5. Driven by the revolution driving force, the main frame of the self-cleaning spiral mechanism 5 drives the rotating shaft 54 ​​to revolve, enabling the spiral blades 51 and the cleaning ring 52 to rotate around the central axis of the drying chamber 1. The gear axial drive transmission mechanism transmits the rotational and revolution driving forces independently, avoiding power interference between the two and simplifying the power transmission path.

[0055] In this embodiment, the distribution and rotation of the spiral blades 51, combined with the mounting flange 53 and the gear axial transmission mechanism, enable the self-cleaning spiral mechanism 5 to achieve dynamic agitation of the radioactive resin, thereby improving the drying efficiency of the radioactive resin.

[0056] In one embodiment, the cleaning component is a cleaning ring 52, and the edge of the spiral blade 51 is provided with a plurality of holes for mounting the cleaning ring 52. The holes correspond one-to-one with the cleaning ring 52, and the cleaning ring 52 is rotatably mounted on the edge of the spiral blade 51 through the holes.

[0057] It should be explained that the shape of the hole can be circular to ensure that the cleaning ring 52 can rotate flexibly within the hole. The inner hole of the cleaning ring 52 can also be designed as a smooth circular structure that fits the hole, allowing the cleaning ring 52 to rotate freely without falling off. During the operation of the radioactive resin treatment device, as the rotating blades rotate, the cleaning ring 52, under the action of centrifugal force, breaks free from its stationary state and gradually comes into contact with the heated inner wall 11 of the drying chamber 1. The free rotation characteristic of the cleaning ring 52 allows it to adapt to different curvatures of the heated inner wall 11 with centrifugal motion, and the resin carbonization layer 6 on the heated inner wall 11 is removed through the knocking and friction action of the cleaning ring 52 against the heated inner wall 11. In this embodiment, the rotatable mounting structure of the cleaning ring 52 and the hole of the spiral blade 51 ensures both the flexibility and reliability of the cleaning component and realizes the dynamic cleaning function of the self-cleaning spiral mechanism 5 on the heated inner wall 11.

[0058] Preferably, the cleaning ring 52 is a polygonal ring with a central opening, and the edge of the polygonal ring is a working surface that contacts the heated inner wall 11.

[0059] In this embodiment, the central opening is used to connect with the holes in the spiral blade 51, allowing the cleaning ring 52 to maintain flexible dynamic characteristics during operation. The polygonal ring structure increases the contact area between the cleaning ring 52 and the heated inner wall 11, thereby improving the cleaning efficiency of the radioactive resin. During the operation of the radioactive resin, when the cleaning ring 52 adheres to the heated inner wall 11 through centrifugal force, its working surface can make close contact with the heated inner wall 11, and the friction and impact force provided by the polygonal edges effectively clean the resin carbonization layer 6.

[0060] In one embodiment, the number of cleaning rings 52 satisfies the following relationship:

[0061] n≥L / l;

[0062] Wherein, n represents the number of cleaning rings 52, L represents the axial length of the heated inner wall 11, and l represents the side length projection of the cleaning ring 52 in the axial direction of the heated inner wall 11. The side length projection of the cleaning ring 52 refers to the projection value of the edge of the cleaning ring 52 along the axial direction of the heated inner wall 11.

[0063] Specifically, the cleaning rings 52 are evenly distributed along the axial direction of the heated inner wall 11 at the edge of the rotating blades to ensure that the cleaning rings 52 cover the entire axial orientation of the heated inner wall 11 during the cleaning process. The side length projection value of each cleaning ring 52 corresponds to the projection result of the geometric dimension in the axial direction, thereby meeting the requirement of full coverage cleaning of the heated inner wall 11, avoiding cleaning blind spots on the heated inner wall 11, and effectively improving the cleaning efficiency of the radioactive resin treatment device.

[0064] Furthermore, the arrangement length of the cleaning ring 52 is the same as the axial length of the heated inner wall 11. The arrangement length refers to the total length of the cleaning ring 52 arranged along the spiral blade 51 in the axial direction of the heated inner wall 11. The cleaning ring 52 is evenly spaced on the edge of the rotating blade and is continuously arranged in the axial direction.

[0065] When the radioactive resin treatment device is running, the spiral blades 51 rotate with the self-cleaning spiral mechanism 5, which drives the cleaning rings 52 to move. The uniformly spaced arrangement and axially continuous arrangement design ensure that the cleaning rings 52 effectively cover all axial areas of the heated inner wall 11 during rotation and revolution, avoiding cleaning blind spots and repeated cleaning areas caused by unreasonable distribution of the cleaning rings 52, thus ensuring the stability and cleaning efficiency of the radioactive resin treatment device.

[0066] Reference Figures 4a-4c The radioactive resin treatment device is configured to have a static state, a stirring state, and a cleaning state.

[0067] Figure 4a The diagram shows a cross-sectional view of the self-cleaning spiral mechanism AA in a static state. In this static state, the cleaning ring 52 hangs down naturally and rests against the edge of the hole in the spiral blade 51. The self-cleaning spiral mechanism 5 maintains a safe distance from the heated inner wall 11.

[0068] Figure 4b The diagram shows a cross-sectional view of the self-cleaning spiral mechanism AA in a static state. In the stirring state, the self-rotation drive mechanism 3 operates at a first speed range, driving the self-cleaning spiral mechanism 5 to rotate, thereby shortening the safe distance between the cleaning ring 52 and the heated inner wall 11 or making the cleaning ring 52 slightly contact with the heated inner wall 11, so as to agitate the radioactive resin between the spiral blade 51 and the heated inner wall 11. At the same time, the revolution drive mechanism 2 drives the self-cleaning spiral mechanism 5 to revolve around the central axis of the drying chamber 1.

[0069] Figure 4c The diagram shows a cross-sectional view of the self-cleaning spiral mechanism AA in a static state. In the clean state, the self-rotation drive mechanism 3 operates at a second speed range, driving the self-cleaning spiral mechanism 5 to rotate, so that the cleaning ring 52 is in contact with the heated inner wall 11, thereby removing the resin carbonized layer 6 on the heated inner wall 11 through knocking and friction. At the same time, the revolution drive mechanism 2 drives the self-cleaning spiral mechanism 5 to rotate around the heated inner wall 11.

[0070] The maximum value of the first speed range is less than the minimum value of the second speed range.

[0071] It should be explained that, in the static state, the self-cleaning spiral mechanism 5 in this embodiment maintains a safe distance from the heated inner wall 11, ensuring wear on the cleaning ring 52 and the heated inner wall 11 during non-operational periods. In the stirring state, this embodiment achieves uniform agitation of the radioactive resin under low-speed rotation of the self-cleaning spiral structure, preventing the accumulation of radioactive resin and initially reducing its adhesion to the heated inner wall 11. In the cleaning state, this embodiment utilizes the centrifugal force of the self-rotating cleaning ring 52 under high-speed rotation of the self-cleaning spiral structure to strike and rub the carbonized resin layer on the heated inner wall 11, thereby efficiently removing the carbonized resin layer. This embodiment, through the coordinated switching of different states of the radioactive resin treatment device, meets multiple requirements in the radioactive resin treatment process, significantly improving the treatment performance of the radioactive resin treatment device.

[0072] Reference Figure 5 The present invention provides a method for treating radioactive resin, using any one of the above-mentioned radioactive resin treatment apparatuses, comprising:

[0073] S11. Inject radioactive resin into the drying chamber, heat the inner wall of the drying chamber through the hot oil heating pipe, start the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, control the self-rotation drive mechanism to operate within the first speed range, so that the self-cleaning spiral structure rotates clockwise around its own axis and agitates the radioactive resin.

[0074] S12. After the agitation of the radioactive resin is completed, the rotation drive mechanism is periodically controlled to operate within the second speed range, so that the cleaning ring in the self-cleaning spiral structure is attached to the heated inner wall of the drying chamber under the action of centrifugal force of rotation. The revolution drive mechanism is started, so that the self-cleaning spiral structure rotates at least one revolution along the heated inner wall. Then, the rotation drive mechanism is adjusted to operate within the first speed range to complete the drying of the radioactive resin.

[0075] The maximum value of the first speed range is less than the minimum value of the second speed range.

[0076] It should be explained that after cleaning the heated inner wall, the rotation drive mechanism is adjusted back to the first speed range. As the rotation speed decreases (i.e., the rotation drive mechanism is adjusted to operate within the first speed range), the cleaning ring gradually detaches from the heated inner wall and re-establishes slight contact with it, avoiding excessive friction between the cleaning ring and the heated inner wall. This embodiment, by periodically switching between the agitation and cleaning states of the radioactive resin, not only efficiently dries the radioactive resin but also maintains the cleanliness and heat transfer efficiency of the radioactive resin treatment device, extending its service life.

[0077] Reference Figure 6 After the radioactive resin has dried, it further includes:

[0078] S13. Stop the hot oil circulation in the hot oil heating pipeline, open the discharge ball valve, control the self-rotation drive mechanism to run within the first speed range, so that the self-cleaning spiral mechanism reverses around its own axis, so as to transport the dried radioactive resin to the discharge port and discharge it from the drying chamber.

[0079] S14. After the material is discharged, close the discharge ball valve, control the self-rotation drive mechanism to run within the second speed range, so that the self-cleaning spiral mechanism reverses around its own axis, and at the same time start the revolution drive mechanism to make the self-cleaning spiral structure rotate at least one revolution along the inner wall of the heating unit, and start the flushing water pipeline to remove the residue on the inner wall of the dryer.

[0080] In this embodiment, step S13, through the reverse operation of the self-cleaning spiral mechanism, enables the dried radioactive resin to be uniformly and effectively pushed to the discharge port, achieving a fast and unblocked discharge operation; while in step S14, the self-cleaning spiral mechanism, under the cooperation of high-speed rotation and revolution, drives the cleaning ring to cover all areas of the heated inner wall, achieving thorough cleaning of the heated inner wall without dead angles. The cooperation of the flushing water pipeline further enhances the cleaning effect of the radioactive resin treatment device, ensuring that the residual radioactive resin and resin carbonization layer on the heated inner wall are completely removed.

[0081] While the present invention has been disclosed above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the scope of protection of the present invention.

Claims

1. A radioactive resin treatment apparatus, characterized in that, The device includes a drying chamber (1), a revolution drive mechanism (2), a rotation drive mechanism (3), an adapter mechanism (4), and a self-cleaning spiral mechanism (5). The side wall of the drying chamber (1) is provided with a heating inner wall (11) for heating the radioactive resin. The self-cleaning spiral mechanism (5) is located inside the drying chamber (1). The rotation drive mechanism (3) and the revolution drive mechanism (2) are connected to the self-cleaning spiral mechanism (5) through the adapter mechanism (4). The self-cleaning spiral mechanism (5) includes a spiral blade (51) and a cleaning component fixed to the edge of the spiral blade (51). The self-rotation drive mechanism (3) is used to drive the self-cleaning spiral mechanism (5) to rotate around the axis of the self-cleaning spiral mechanism (5) to agitate the radioactive resin, or to use the centrifugal force of rotation to make the cleaning component stick to the heated inner wall (11) to remove the resin carbonization layer (6) on the heated inner wall (11) by the knocking and friction of the cleaning component. The revolution drive mechanism (2) is used to drive the self-cleaning spiral mechanism (5) to revolve around the central axis of the drying chamber (1). The cleaning component is a cleaning ring (52). The edge of the spiral blade (51) is provided with a plurality of holes for installing the cleaning ring (52). The holes correspond one-to-one with the cleaning ring (52). The cleaning ring (52) is rotatably installed on the edge of the spiral blade (51) through the holes. The radioactive resin treatment device is configured to be in a static state, a stirring state, and a cleaning state. In the static state, the cleaning ring (52) hangs down naturally and rests on the edge of the hole of the spiral blade (51), and the self-cleaning spiral mechanism (5) maintains a safe distance from the heated inner wall (11); In the stirring state, the self-rotation drive mechanism (3) operates at a first speed range, driving the self-cleaning spiral mechanism (5) to rotate, shortening the safe distance between the cleaning ring (52) and the heated inner wall (11) or making the cleaning ring (52) slightly contact the heated inner wall (11) to stir the radioactive resin between the spiral blade (51) and the heated inner wall (11), while the revolution drive mechanism (2) drives the self-cleaning spiral mechanism (5) to revolve around the central axis of the drying chamber (1); In the clean state, the self-rotation drive mechanism (3) operates at the second speed range, driving the self-cleaning spiral mechanism (5) to rotate, so that the cleaning ring (52) is attached to the heated inner wall (11) to remove the resin carbonized layer (6) on the heated inner wall (11) by tapping and friction. At the same time, the revolution drive mechanism (2) drives the self-cleaning spiral mechanism (5) to rotate around the heated inner wall (11). Wherein, the maximum value of the first speed range is less than the minimum value of the second speed range; The cleaning ring (52) is a polygonal ring with a central opening, and the edge of the polygonal ring is the working surface that contacts the heated inner wall (11).

2. The radioactive resin treatment apparatus according to claim 1, characterized in that, The cleaning component maintains a safe distance from the heated inner wall (11) when stationary, and uses the centrifugal force of the self-cleaning spiral mechanism (5) to adhere to the heated inner wall (11) when the self-cleaning spiral mechanism (5) rotates.

3. The radioactive resin treatment apparatus according to claim 1, characterized in that, The adapter mechanism (4) is a gear axial transmission mechanism. The self-cleaning spiral mechanism (5) also includes a mounting flange (53) and a rotating shaft (54). The mounting flange (53) is fixedly connected to one end of the rotating shaft (54). The rotating shaft (54) is connected to the self-rotation drive mechanism (3) through the gear axial transmission mechanism. The gear axial transmission mechanism transmits driving power to the rotating shaft (54) through the mounting flange (53), so that the rotating shaft (54) drives the spiral blade (51) to rotate. The spiral blade (51) is fixed on the rotating shaft (54) and is spirally distributed along the axial direction of the rotating shaft (54). The pitch of the spiral blade (51) is the same along the axial direction of the rotating shaft (54).

4. The radioactive resin treatment apparatus according to claim 1, characterized in that, The number of the cleaning rings (52) satisfies the following relationship: ； in, This indicates the number of the cleaning rings (52). This indicates the axial length of the heated inner wall (11). The side length projection of the cleaning ring (52) in the axial direction of the heated inner wall (11) is indicated by the projection value of the edge of the cleaning ring (52) along the axial direction of the heated inner wall (11).

5. The radioactive resin treatment apparatus according to claim 4, characterized in that, The length of the cleaning ring (52) is the same as the axial length of the heated inner wall (11). The length of the arrangement refers to the total length of the cleaning ring (52) along the spiral blade (51) in the axial direction of the heated inner wall (11). The cleaning ring (52) is evenly spaced on the edge of the spiral blade and is continuously arranged in the axial direction.

6. A method for treating radioactive resin, using the radioactive resin treatment apparatus according to any one of claims 1-5, characterized in that, include: S11. Inject radioactive resin into the drying chamber, heat the inner wall of the drying chamber through the hot oil heating pipe, start the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, control the self-rotation drive mechanism to operate within the first speed range, so that the self-cleaning spiral mechanism rotates clockwise around its own axis and agitates the radioactive resin. S12. After the agitation of the radioactive resin is completed, the rotation drive mechanism is periodically controlled to operate within the second speed range, so that the cleaning ring in the self-cleaning spiral mechanism is attached to the heated inner wall of the drying chamber under the action of centrifugal force of rotation. The revolution drive mechanism is started, so that the self-cleaning spiral mechanism rotates at least one revolution along the heated inner wall. Then, the rotation drive mechanism is adjusted to operate within the first speed range to complete the drying of the radioactive resin. The maximum value of the first speed range is less than the minimum value of the second speed range.

7. The method for treating radioactive resin according to claim 6, characterized in that, After the radioactive resin has dried, it further includes: S13. Stop the hot oil circulation in the hot oil heating pipeline, open the discharge ball valve, control the self-rotation drive mechanism to run within the first speed range, so that the self-cleaning spiral mechanism reverses around its own axis, so as to transport the dried radioactive resin to the discharge port and discharge it from the drying chamber. S14. After the material is discharged, close the discharge ball valve, control the self-rotation drive mechanism to run within the second speed range, so that the self-cleaning spiral mechanism reverses around its own axis, and at the same time start the revolution drive mechanism to make the self-cleaning spiral mechanism rotate at least one revolution along the heated inner wall, and start the flushing water pipeline to remove the residue on the inner wall of the drying chamber.

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