Radioactive resin treatment device and method

Abstract

The invention provides a radioactive resin treatment device and method, and relates to the technical field of radioactive resin treatment.The device comprises a drying chamber, a revolution driving mechanism, a rotation driving mechanism, an adaptive mechanism and a self-cleaning spiral mechanism, and the side wall of the drying chamber is provided with a heating inner wall used for heating radioactive resin. The autorotation driving mechanism and the revolution driving mechanism are connected with the self-cleaning screw mechanism through the adaptation mechanism, and the self-cleaning screw mechanism comprises a screw blade and a cleaning component fixed to the edge of the screw blade. The autorotation driving mechanism drives the self-cleaning spiral mechanism to autorotate around the axis of the self-cleaning spiral mechanism and is used for stirring radioactive resin or enabling the cleaning component to be attached to the heated inner wall through autorotation centrifugal force and removing a resin carbonization layer through the knocking and friction effects; the revolution driving mechanism drives the self-cleaning spiral mechanism to revolve around the central axis of the drying chamber. According to the radioactive resin drying device, efficient cleaning of a resin carbonization layer in the radioactive resin drying process can be achieved, and the drying efficiency of radioactive resin is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of radioactive resin processing, and in particular to a radioactive resin processing device and method. Background Art

[0002] During the operation of nuclear power plants, waste resins have certain radioactivity and therefore need to be dried in nuclear resin conical dryers. Nuclear resin conical dryers mainly use hot oil heating to transfer heat to the inner wall of the dryer and further to the resin, thereby achieving heating and drying of the resin. However, during the long-term operation of the nuclear resin conical dryer, the resin is prone to form a layer of resin carbonization layer on the inner wall of the nuclear resin conical dryer at high temperatures. The resin carbonization layer is not only viscous, but also thick, which will seriously hinder the transfer of heat, resulting in a gradual decrease in the drying efficiency of the nuclear resin conical dryer and a continuous increase in energy consumption.

[0003] At present, the design of nuclear resin conical dryers is usually equipped with a water spray cleaning function in order to remove the resin carbonization layer on the inner wall by flushing. However, when the resin carbonization layer is thick and has strong adhesion, it is difficult to effectively remove it by simply relying on water spray cleaning, and the cleaning effect is poor. Summary of the invention

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

[0005] In order to solve the above problems, the present invention provides a radioactive resin processing device and method.

[0006] On the one hand, the present invention provides a radioactive resin processing device, comprising a drying chamber, a revolution drive mechanism, a self-rotation drive mechanism, an adaptor mechanism and a self-cleaning spiral mechanism, wherein 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 self-rotation drive mechanism and the revolution drive mechanism are connected to the self-cleaning spiral mechanism through the adaptor mechanism, and the self-cleaning spiral mechanism comprises a spiral blade and a cleaning member fixed to the edge of the spiral blade;

[0007] Among them, 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 stir the radioactive resin, or make the cleaning component stick to the heated inner wall using the centrifugal force of rotation, so as to remove the carbonized resin layer on the heated inner wall by knocking by the cleaning component and / or friction force, and 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 member maintains a safe distance from the heated inner wall in a stationary state, and abuts against the heated inner wall by utilizing the centrifugal force of the rotation when the self-cleaning spiral mechanism rotates.

[0009] Optionally, the adaptation mechanism is a gear axial transmission mechanism, and the self-cleaning spiral mechanism also includes a mounting flange and a rotating shaft, the mounting flange is fixedly connected to one end of the rotating shaft, and the rotating shaft is connected to the self-rotation drive mechanism through the gear axial transmission mechanism, and 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 achieve self-rotation, 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 in the axial direction of the rotating shaft is the same.

[0010] Optionally, the cleaning component is a cleaning ring, the edge of the spiral blade is provided with a plurality of holes for installing the cleaning ring, the holes correspond to the cleaning rings one by one, 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 body with a central opening, and the edge of the polygonal ring body is a working surface that contacts the heated inner wall.

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

[0013] n ≥ L / l;

[0014] Wherein, n represents the number of the cleaning rings, L represents the axial length of the heating inner wall, l represents the side length projection of the cleaning ring in the axial direction of the heating inner wall, and 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 heating inner wall.

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

[0016] Optionally, the radioactive resin processing device is configured with a static state, a stirring state, and a cleaning state;

[0017] In the static state, the cleaning ring naturally droops and rests on the edge of the hole of the spiral blade, and the self-cleaning spiral mechanism maintains a safe distance from the heating inner wall;

[0018] In the stirring state, the self-rotation drive mechanism operates in a first speed range, driving the self-cleaning spiral mechanism to self-rotate, so that the safety distance between the cleaning ring and the heated inner wall is shortened / or the cleaning ring and the heated inner wall are slightly contacted, so as to stir the radioactive resin between the spiral blade and the heated inner wall, and at the same time, the self-cleaning spiral mechanism is driven to revolve around the central axis of the drying chamber through the revolution drive mechanism;

[0019] In the cleaning state, the self-rotation drive mechanism operates in a second speed range, driving the self-cleaning spiral mechanism to rotate, so that the cleaning ring is in contact with the heated inner wall, so as to remove the carbonized resin layer on the heated inner wall by knocking and friction, and at the same time, the self-cleaning spiral mechanism is driven to rotate around the heated inner wall by the revolution drive mechanism;

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

[0021] In another aspect, the present invention provides a method for treating a radioactive resin, using any one of the above-mentioned radioactive resin treating devices, comprising:

[0022] S11, injecting radioactive resin into the drying chamber, heating the heated inner wall of the drying chamber through a hot oil heating pipeline, starting the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, controlling the self-rotation drive mechanism to operate within a first speed range, so that the self-cleaning spiral structure rotates forward around its own axis and stirs the radioactive resin;

[0023] S12, after the radioactive resin is stirred, the self-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 pressed against the heated inner wall of the drying chamber under the action of the self-rotation centrifugal force, the revolution drive mechanism is started, and after the self-cleaning spiral structure rotates along the heated inner wall for at least one circle, the self-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 smaller than the minimum value of the second speed range.

[0025] Optionally, after the radioactive resin is dried, the method further comprises:

[0026] S13, stopping the hot oil circulation of the hot oil heating pipeline, opening the discharge ball valve, controlling the self-rotation drive mechanism to operate within the first speed range, and making the self-cleaning spiral mechanism reverse 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 discharge is completed, the discharge ball valve is closed, and the self-rotation drive mechanism is controlled to operate within the second speed range, so that the self-cleaning spiral mechanism is reversed around its own axis, and at the same time, the revolution drive mechanism is started to make the self-cleaning spiral structure rotate along the heated inner wall for at least one circle, and the flushing water pipeline is started to remove the residues on the inner wall of the dryer.

[0028] Compared with the prior art, the beneficial effect of the radioactive resin treatment device of the present invention is that the self-cleaning spiral mechanism can realize self-rotation and revolution motion at the same time through the coordinated transmission of the self-rotation drive mechanism and the revolution drive mechanism, wherein the self-cleaning spiral mechanism is composed of a spiral blade and a cleaning member. During the drying process, the spiral blade dynamically stirs the radioactive resin through the self-rotation motion to prevent the radioactive resin from accumulating and locally overheating, and at the same time cooperates with the revolution motion to ensure that the radioactive resin is evenly distributed in the drying chamber, so as to achieve comprehensive heating and efficient drying; during the cleaning process, the cleaning member uses the self-rotation centrifugal force generated by the self-rotation to stick to the heated inner wall, and efficiently removes the resin carbonization layer attached to the heated inner wall through the knocking and friction of its edge. The revolution motion of the cleaning member further ensures that it covers the entire heated inner wall, avoids cleaning blind spots, and maintains the heat conduction efficiency of the heated inner wall. The coordinated design of the adapter mechanism ensures the stability and power transmission accuracy of the self-cleaning spiral mechanism in the self-rotation and revolution motions, thereby achieving efficient drying of the radioactive resin and deep cleaning of the resin carbonization layer, and improving the operating efficiency and service life of the equipment. The present invention can realize efficient cleaning of the resin carbonization layer during the drying process of the radioactive resin, thereby improving the drying efficiency of the radioactive resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a radioactive resin processing device according to an embodiment of the present invention;

[0030] Figure 2 It is a structural schematic diagram of a self-cleaning spiral mechanism in a radioactive resin processing device according to an embodiment of the present invention;

[0031] Figure 3 It is a structural schematic diagram of another perspective of a self-cleaning spiral mechanism in a radioactive resin processing device according to an embodiment of the present invention;

[0032] Figure 4a-4c It is a schematic structural diagram of the AA section of a self-cleaning spiral mechanism in different states in a radioactive resin treatment device according to an embodiment of the present invention;

[0033] Figure 5 A schematic flow chart of a radioactive resin treatment method according to an embodiment of the present invention;

[0034] Figure 6The figure is a schematic flow chart of a radioactive resin treatment method according to another embodiment of the present invention.

[0035] Description of reference numerals:

[0036] 1-drying chamber; 11-heating inner wall; 2-revolution driving mechanism; 3-rotation driving mechanism; 4-adapting mechanism; 5-self-cleaning spiral mechanism; 51-spiral blade; 52-cleaning ring; 53-mounting flange; 54-rotating shaft; 6-resin carbonization layer. DETAILED DESCRIPTION

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

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

[0039] Nuclear power plants produce a large amount of waste resin every year, which mainly comes from the ion exchange resin used for water purification in nuclear power plants. During long-term use, it absorbs radioactive substances and therefore has a certain degree of radioactivity. Drying and reducing the volume of radioactive resin and then permanently sealing it can not only effectively reduce the volume of radioactive waste and save storage space, but also improve the safety of nuclear waste. It is one of the current options for nuclear waste treatment. As the core equipment in the drying and reducing volume treatment, the performance and function of the nuclear resin conical dryer will have a direct impact on the treatment efficiency of the radioactive resin.

[0040] At present, nuclear resin conical dryers mainly use hot oil to heat the inner wall of the drying chamber, and transfer heat to the radioactive resin by heat conduction to achieve the drying of radioactive resin. However, the radioactive resin near the heated inner wall is prone to form a hard and sticky resin carbonized layer on the heated inner wall of the drying chamber after long-term heating.

[0041] As the equipment runs longer, the carbonized resin layer gradually thickens, and its cumulative effect significantly affects the heating efficiency of the radioactive resin. On the one hand, the presence of the carbonized resin layer will hinder the transfer of heat from the heated inner wall to the waste resin, resulting in reduced heating efficiency and prolonged drying time; on the other hand, the energy consumption of the nuclear resin conical dryer will increase accordingly, affecting the operating economy of the nuclear resin conical dryer. In addition, the presence of the carbonized resin layer may also increase the operating load of the nuclear resin conical dryer, accelerate the aging rate of the equipment, and shorten the service life. Since the radioactive resin itself is radioactive, the operating environment of the nuclear resin conical dryer is also in an area with high radiation protection requirements, so the resin carbonized layer cannot be removed by manual removal. At present, nuclear resin conical dryers are usually equipped with a water spray flushing function to remove loose radioactive resin attached to the heated inner wall. However, the water spray flushing function has limited effect on the already formed resin carbonized layer, especially the resin carbonized layer is hard and has strong adhesion, and conventional flushing methods are difficult to achieve effective removal. Therefore, the carbonized layer of resin on the inner wall of the heater gradually accumulates, causing the thermal efficiency and operating efficiency of the nuclear resin conical dryer to continue to decline, and the difficulty and cost of subsequent maintenance also continue to increase.

[0042] Reference Figure 1 The present invention provides a radioactive resin processing 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 in the drying chamber 1. The self-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 on the edge of the spiral blade 51.

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

[0044] Among them, 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 stir the radioactive resin, or make the cleaning component stick to the heated inner wall 11 using the centrifugal force of rotation, so as to remove the resin carbonized layer 6 on the heated inner wall 11 by knocking and / or friction force of the cleaning component, and 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 with the prior art, the beneficial effect of the radioactive resin treatment device of the present invention is: through the coordinated transmission of the self-rotation drive mechanism 3 and the revolution drive mechanism 2, the self-cleaning spiral mechanism 5 can realize the self-rotation and revolution motion at the same time, wherein the self-cleaning spiral mechanism 5 is composed of a spiral blade 51 and a cleaning member. During the drying process, the spiral blade 51 dynamically stirs the radioactive resin through the self-rotation motion to prevent the radioactive resin from accumulating and locally overheating, and at the same time cooperates with the revolution motion to ensure that the radioactive resin is evenly distributed in the drying chamber 1, so as to achieve comprehensive heating and efficient drying; during the cleaning process, the cleaning member uses the self-rotation centrifugal force generated by the self-rotation to stick to the heating inner wall 11, and efficiently removes the resin carbonization layer 6 attached to the heating inner wall 11 through the knocking and friction of its edge. The revolution motion of the cleaning member further ensures that it covers the entire heating inner wall 11, avoids cleaning blind spots, and maintains the heat conduction efficiency of the heating inner wall 11. The coordinated design of the adapter mechanism 4 ensures the stability and power transmission accuracy of the self-cleaning spiral mechanism 5 in the rotation and revolution motion, thereby achieving efficient drying of the radioactive resin and deep cleaning of the resin carbonization layer 6, and improving the operating efficiency and service life of the equipment. The present invention can achieve efficient cleaning of the resin carbonization layer 6 during the drying process of the radioactive resin, and improve the drying efficiency of the radioactive resin.

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

[0047] Specifically, when the radioactive resin treatment device is in a stationary state, the cleaning member remains drooping under the action of natural gravity and maintains a certain safety distance from the heated inner wall 11 to avoid direct contact between the cleaning member and the inner wall, thereby preventing possible wear and damage to the machine in a non-working state. When the self-cleaning spiral mechanism 5 is driven by the self-rotation drive mechanism 3 to rotate, the cleaning member is subjected to the self-rotation centrifugal force generated by the self-rotation motion, and gradually deflects from the natural drooping state and abuts against the heated inner wall 11. The magnitude of the self-rotation centrifugal force can be adjusted as the self-rotation speed changes to ensure that the cleaning member can stably abut against the inner wall surface and maintain continuous contact. While the cleaning member abuts against the heated inner wall 11, the self-cleaning spiral mechanism 5 generates friction on the surface of the heated inner wall 11 along the rotation trajectory, and the resin carbonization layer 6 attached to the heated inner wall 11 is continuously removed through dynamic motion to maintain the stability of the radioactive resin treatment device during operation.

[0048] Reference Figure 2 and Figure 3The adapting mechanism 4 is a gear axial transmission mechanism, and 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 driving 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 realize self-rotation. The spiral blade 51 is fixed on the rotating shaft 54 ​​and is spirally distributed along the axial direction of the rotating shaft 54, and the pitch of the spiral blade 51 in the axial direction of the rotating shaft 54 ​​is the same.

[0049] Specifically, the gear axial transmission mechanism is used to connect 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, and is used to reliably transmit the driving force transmitted by the gear axial transmission mechanism to the rotating shaft 54, thereby driving the rotating shaft 54 ​​to rotate stably. The spiral blades 51 are distributed in a spiral shape along the rotating shaft 54 ​​and are fixedly connected to the rotating shaft 54 ​​to ensure that the rotating blades can rotate with the rotating shaft 54. In order to achieve uniform stirring of the radioactive resin, the pitch of the spiral blades 51 is kept consistent in the axial direction of the rotating shaft 54, thereby effectively pushing the radioactive resin forward during the rotational motion of the rotating shaft 54, while avoiding the accumulation of the radioactive resin, ensuring uniform heating of the radioactive resin, and thus avoiding local overheating. At the same time, the gear axial transmission mechanism provides precise power transmission to ensure the stable operation of the rotating shaft 54 ​​to reduce vibration or energy loss caused by uneven driving.

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

[0051] Further, the gear axial transmission mechanism may include a rotation drive gear, a revolution drive gear, a rotation driven gear, a revolution distribution gear, a rotation transmission shaft and a revolution transmission shaft.

[0052] The output shaft of the self-rotation driving mechanism 3 meshes with the driven gear through the self-rotation driving gear, and the axis of the self-rotation driving gear is coaxially arranged with the output shaft of the self-rotation driving gear. The driven gear is connected to the self-cleaning spiral mechanism 5 (which can be a mounting flange) through the self-rotation transmission shaft, and is used to transmit the self-rotation driving force to the self-cleaning spiral mechanism 5.

[0053] The output shaft of the revolution driving mechanism 2 outputs power to the revolution distribution gear through the revolution driving 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, wherein the self-rotation driving force of the self-rotation driving mechanism 3 can be transmitted to the rotating shaft 54 ​​through the mounting flange 53 to realize the revolution of the self-cleaning spiral mechanism 5, and the revolution driving force of the revolution driving mechanism 2 can be directly transmitted to the main frame of the self-cleaning spiral mechanism 5. The main frame of the self-cleaning spiral mechanism 5 is driven by the revolution driving force to drive the rotating shaft 54 ​​to revolve, so as to realize the rotation of the spiral blade 51 and the cleaning ring 52 around the central axis of the drying chamber 1. The gear axial drive transmission mechanism transmits the self-rotation driving force and the revolution driving force independently, thereby avoiding power interference between the two and simplifying the power transmission path.

[0055] In this embodiment, the distribution and rotational movement of the spiral blades 51 are matched with the mounting flange 53 and the gear axial transmission mechanism, so that the self-cleaning spiral mechanism 5 can achieve dynamic stirring 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 installing the cleaning ring 52, the holes correspond one-to-one to the cleaning ring 52, and the cleaning ring 52 is rotatably installed on the edge of the spiral blade 51 through the holes.

[0057] It should be explained that the shape of the hole can be designed to be circular to ensure that the cleaning ring 52 can rotate flexibly on the hole. The inner hole shape of the cleaning ring 52 can also be designed to be a smooth circular structure that matches the hole, so that the cleaning ring 52 can rotate freely but not fall off. When the radioactive resin treatment device is in operation, with the rotation of the rotating blades, the cleaning ring 52 gets rid of the static state under the action of the self-rotation centrifugal force, and gradually sticks to the heated inner wall 11 of the drying chamber 1. The free rotation characteristic of the cleaning ring 52 enables it to adapt to different curvatures of the heated inner wall 11 with the centrifugal movement, and removes the resin carbonization layer 6 on the heated inner wall 11 through the knocking and friction of the cleaning ring 52 on the heated inner wall 11. This embodiment ensures the flexibility and reliability of the cleaning component through the rotatable mounting structure of the cleaning ring 52 and the hole of the spiral blade 51, 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 body with a central opening, and the edge of the polygonal ring body is a working surface that contacts the heating inner wall 11 .

[0059] The central opening in this embodiment is used to cooperate with the hole of the spiral blade 51, so that the cleaning ring 52 can maintain flexible dynamic characteristics during operation. The structure of the polygonal ring body can increase 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 is pressed against the heated inner wall 11 by the centrifugal force of rotation, its working surface can be in close contact with the heated inner wall 11, and the resin carbonization layer 6 can be effectively cleaned by the friction and knocking force provided by the polygonal edge.

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

[0061] n ≥ L / l;

[0062] Among them, n represents the number of the cleaning rings 52, L represents the axial length of the heating inner wall 11, l represents the side length projection of the cleaning ring 52 in the axial direction of the heating inner wall 11, and 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 heating inner wall 11.

[0063] Specifically, the cleaning rings 52 are evenly distributed along the axial direction of the heating inner wall 11 at the edge of the rotating blades to ensure that the cleaning rings 52 cover the entire axial direction of the heating 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 full coverage cleaning requirement for the heating inner wall 11, avoiding the occurrence of cleaning blind spots on the heating 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 heating inner wall 11, and the arrangement length refers to the total arrangement length of the cleaning ring 52 along the spiral blade 51 in the axial direction of the heating inner wall 11. The cleaning ring 52 is evenly spaced at the edge of the rotating blade and is continuously arranged in the axial direction.

[0065] When the radioactive resin processing device is in operation, the spiral blades 51 drive the cleaning ring 52 to move as the self-cleaning spiral mechanism 5 rotates. The evenly spaced arrangement and axially continuous arrangement design can ensure that the cleaning ring 52 effectively covers all axial areas of the heated inner wall 11 during rotation and revolution, avoiding cleaning blind spots and repeated cleaning areas due to unreasonable distribution of the cleaning ring 52, thereby ensuring the stability and cleaning efficiency of the radioactive resin processing device.

[0066] Reference Figure 4a-4c , the radioactive resin processing device is configured with a static state, a stirring state and a cleaning state;

[0067] Figure 4a Schematic diagram of the structure of the AA section of the self-cleaning spiral mechanism in a stationary state. In the stationary state, the cleaning ring 52 naturally droops 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 heating inner wall 11;

[0068] Figure 4b Schematic diagram of the structure of the AA section of the self-cleaning spiral mechanism in a stationary state. In the stirring state, the self-rotation drive mechanism 3 operates in a first speed range to drive the self-cleaning spiral mechanism 5 to rotate, so that the safety distance between the cleaning ring 52 and the heated inner wall 11 is shortened / or the cleaning ring 52 is slightly in contact with the heated inner wall 11 to stir the radioactive resin between the spiral blade 51 and the heated inner wall 11, and at the same time, the self-cleaning spiral mechanism 5 is driven to revolve around the central axis of the drying chamber 1 through the revolution drive mechanism 2;

[0069] Figure 4c Schematic diagram of the structure of the AA section of the self-cleaning spiral mechanism in a stationary state. In the cleaning state, the self-rotation drive mechanism 3 operates in the second speed range to drive 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 through knocking and friction, and at the same time, the self-cleaning spiral mechanism 5 is driven to rotate around the heated inner wall 11 by the revolution drive mechanism 2;

[0070] The maximum value of the first speed range is smaller 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, which can ensure that the cleaning ring 52 and the heated inner wall 11 are not worn in the non-working state; in the stirring state, this embodiment can achieve uniform stirring of the radioactive resin under the low-speed rotation of the self-cleaning spiral structure, avoid the accumulation of radioactive resin and preliminarily reduce the adhesion of radioactive resin on the heated inner wall 11; in the cleaning state, this embodiment can use the self-rotation centrifugal force of the cleaning ring 52 under the high-speed rotation of the self-cleaning spiral structure, so that the cleaning ring 52 knocks and rubs the carbonized resin layer on the heated inner wall 11, thereby efficiently removing the carbonized resin layer on the heated inner wall 11. This embodiment meets multiple requirements in the radioactive resin processing process through the coordinated switching of different states of the radioactive resin processing device, and significantly improves the processing performance of the radioactive resin processing device for radioactive resin.

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

[0073] S11, injecting radioactive resin into the drying chamber, heating the heated inner wall of the drying chamber through a hot oil heating pipeline, starting the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, controlling the self-rotation drive mechanism to operate within a first speed range, so that the self-cleaning spiral structure rotates forward around its own axis and stirs the radioactive resin;

[0074] S12, after the radioactive resin is stirred, the self-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 pressed against the heated inner wall of the drying chamber under the action of the self-rotation centrifugal force, the revolution drive mechanism is started, and after the self-cleaning spiral structure rotates along the heated inner wall for at least one circle, the self-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 smaller than the minimum value of the second speed range.

[0076] It should be explained that after the cleaning of the heated inner wall is completed, the self-rotation drive mechanism is adjusted back to the first speed range, and the cleaning ring gradually separates from the heated inner wall as the self-rotation speed decreases (i.e., the self-rotation drive mechanism is adjusted to operate within the first speed range), and is in a slight contact state with the heated inner wall again, thereby avoiding excessive friction between the cleaning ring and the heated inner wall. This embodiment can not only efficiently complete the drying of the radioactive resin by periodically switching the stirring state and the cleaning state of the radioactive resin, but also maintain the cleanliness and heat transfer efficiency of the radioactive resin processing device, thereby extending the service life of the radioactive resin processing device.

[0077] Reference Figure 6 , after drying the radioactive resin, further comprising:

[0078] S13, stopping the hot oil circulation of the hot oil heating pipeline, opening the discharge ball valve, controlling the self-rotation drive mechanism to operate within the first speed range, and making the self-cleaning spiral mechanism reverse 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 discharge is completed, the discharge ball valve is closed, and the self-rotation drive mechanism is controlled to operate within the second speed range, so that the self-cleaning spiral mechanism is reversed around its own axis, and at the same time, the revolution drive mechanism is started to make the self-cleaning spiral structure rotate along the heated inner wall for at least one circle, and the flushing water pipeline is started to remove the residues on the inner wall of the dryer.

[0080] In this embodiment, step S13 reverses the self-cleaning spiral mechanism so that the dried radioactive resin can be evenly and effectively pushed to the discharge port, thereby realizing fast and unblocked discharge operation; and in step S14, the self-cleaning spiral mechanism drives the cleaning ring to cover all areas of the heated inner wall under the coordination of high-speed rotation and revolution, thereby realizing dead-angle cleaning of the heated inner wall, and the cooperation of the flushing water pipeline further enhances the cleaning effect of the radioactive resin processing device, ensuring that the residual radioactive resin and the carbonized resin layer on the heated inner wall are completely removed.

[0081] Although the present invention is disclosed as above, the protection scope of the present invention is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. A radioactive resin treatment device, characterized in that: The invention comprises a drying chamber (1), a revolution drive mechanism (2), a rotation drive mechanism (3), an adaptor 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 in the drying chamber (1); the rotation drive mechanism (3) and the revolution drive mechanism (2) are connected to the self-cleaning spiral mechanism (5) via the adaptor mechanism (4); the self-cleaning spiral mechanism (5) comprises a spiral blade (51) and a cleaning member 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 stir the radioactive resin, or to use the centrifugal force of the self-rotation to make the cleaning member stick to the heated inner wall (11), so as to remove the resin carbonization layer (6) on the heated inner wall (11) by knocking of the cleaning member and / or friction force, and 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).

2. The radioactive resin processing device according to claim 1, characterized in that: The cleaning component maintains a safe distance from the heated inner wall (11) in a stationary state, and abuts against the heated inner wall (11) by utilizing the centrifugal force of the rotation when the self-cleaning spiral mechanism (5) rotates.

3. The radioactive resin processing device according to claim 1, characterized in that: The adapting mechanism (4) is a gear axial transmission mechanism, and the self-cleaning spiral mechanism (5) further comprises a mounting flange (53) and a rotating shaft (54), wherein the mounting flange (53) is fixedly connected to one end of the rotating shaft (54), and the rotating shaft (54) is connected to the self-rotation driving mechanism (3) via the gear axial transmission mechanism, and the gear axial transmission mechanism transmits driving power to the rotating shaft (54) via the mounting flange (53), so that the rotating shaft (54) drives the spiral blade (51) to realize self-rotation, and the spiral blade (51) is fixed on the rotating shaft (54) and is distributed in a spiral shape along the axial direction of the rotating shaft (54), and the pitch of the spiral blade (51) in the axial direction of the rotating shaft (54) is the same.

4. The radioactive resin processing device according to claim 1, characterized in that: The cleaning component is a cleaning ring (52), and the edge of the spiral blade (51) is provided with a plurality of holes for installing the cleaning ring (52), the holes corresponding to the cleaning ring (52) one by one, and the cleaning ring (52) is rotatably installed on the edge of the spiral blade (51) through the holes.

5. The radioactive resin processing device according to claim 4, characterized in that: The cleaning ring (52) is a polygonal ring body with a central opening, and the edge of the polygonal ring body is a working surface that contacts the heating inner wall (11).

6. The radioactive resin processing device according to claim 4, characterized in that: The number of the cleaning rings (52) satisfies the following relationship: n ≥ L / l; Wherein, n represents the number of the cleaning rings (52), L represents the axial length of the heating inner wall (11), l represents the side length projection of the cleaning ring (52) in the axial direction of the heating inner wall (11), and 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 heating inner wall (11).

7. The radioactive resin processing device according to claim 6, characterized in that: The arrangement length of the cleaning ring (52) is the same as the axial length of the heating inner wall (11), and the arrangement length refers to the total arrangement length of the cleaning ring (52) along the spiral blade (51) in the axial direction of the heating inner wall (11). The cleaning ring (52) is evenly spaced and arranged at the edge of the rotating blade and is continuously arranged in the axial direction.

8. The radioactive resin processing device according to claim 4, characterized in that: The radioactive resin processing device is configured with a static state, a stirring state and a cleaning state; In the static state, the cleaning ring (52) naturally droops 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 heating inner wall (11); In the stirring state, the self-rotation drive mechanism (3) operates in a first speed range, driving the self-cleaning spiral mechanism (5) to rotate, thereby shortening the safety 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), so as to stir the radioactive resin between the spiral blade (51) and the heated inner wall (11), and at the same time driving the self-cleaning spiral mechanism (5) to revolve around the central axis of the drying chamber (1) through the revolution drive mechanism (2); In the cleaning state, the self-rotation drive mechanism (3) operates in a second speed range, driving the self-cleaning spiral mechanism (5) to rotate, so that the cleaning ring (52) is pressed against the heated inner wall (11), so as to remove the resin carbonization layer (6) on the heated inner wall (11) through knocking and friction, and at the same time, the self-cleaning spiral mechanism (5) is driven to rotate around the heated inner wall (11) through the revolution drive mechanism (2); The maximum value of the first speed range is smaller than the minimum value of the second speed range.

9. A method for treating radioactive resin, using the radioactive resin treating device according to any one of claims 1 to 8, characterized in that: include: S11, injecting radioactive resin into the drying chamber, heating the heated inner wall of the drying chamber through a hot oil heating pipeline, starting the revolution drive mechanism to drive the self-cleaning spiral mechanism to revolve around the heated inner wall, controlling the self-rotation drive mechanism to operate within a first speed range, so that the self-cleaning spiral structure rotates forward around its own axis and stirs the radioactive resin; S12, after the radioactive resin is stirred, the self-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 pressed against the heated inner wall of the drying chamber under the action of the self-rotation centrifugal force, the revolution drive mechanism is started, and after the self-cleaning spiral structure rotates along the heated inner wall for at least one circle, the self-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 smaller than the minimum value of the second speed range.

10. The radioactive resin treatment method according to claim 9, characterized in that: After the radioactive resin is dried, the method further comprises: S13, stopping the hot oil circulation of the hot oil heating pipeline, opening the discharge ball valve, controlling the self-rotation drive mechanism to operate within the first speed range, and making the self-cleaning spiral mechanism reverse 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 discharge is completed, the discharge ball valve is closed, and the self-rotation drive mechanism is controlled to operate within the second speed range, so that the self-cleaning spiral mechanism is reversed around its own axis, and at the same time, the revolution drive mechanism is started to make the self-cleaning spiral structure rotate along the heated inner wall for at least one circle, and the flushing water pipeline is started to remove the residues on the inner wall of the dryer.

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