CN-119742098-B - Radioactive resin treatment device and method

CN119742098BCN 119742098 BCN119742098 BCN 119742098BCN-119742098-B

Abstract

The invention provides a radioactive resin treatment device and a radioactive resin treatment method, which relate to the technical field of radioactive resin treatment, the device comprises a drying chamber, a revolution driving mechanism, a rotation driving mechanism, an adapting mechanism and a self-cleaning spiral mechanism, wherein the side wall of the drying chamber is provided with a heating inner wall for heating radioactive resin. The self-cleaning screw mechanism comprises a screw blade and a cleaning component fixed at the edge of the screw blade. The self-cleaning spiral mechanism is driven by the rotation driving mechanism to rotate around the axis of the self-cleaning spiral mechanism, the self-cleaning spiral mechanism is used for stirring radioactive resin or enabling the cleaning member to be abutted against the heating inner wall through rotation centrifugal force and removing the resin carbonization layer through knocking and friction, and the self-cleaning spiral mechanism is driven by the revolution driving mechanism to revolve around the central axis of the drying chamber. The invention can realize the efficient cleaning of the resin carbonized layer in the radioactive resin drying process, and improves the drying efficiency of the radioactive resin.

Inventors

CHANG HUAIDE
CHEN SI
AN SHAOPENG
WANG SIFANG
LIU ZHAO

Assignees

一重集团大连工程技术有限公司
中国第一重型机械股份公司

Dates

Publication Date: 20260512
Application Date: 20241227

Claims (7)

1. The radioactive resin treatment device is characterized by comprising a drying chamber (1), a revolution driving mechanism (2), a rotation driving mechanism (3), an adapting mechanism (4) and a self-cleaning screw mechanism (5), wherein a heating inner wall (11) for heating radioactive resin is arranged on the side wall of the drying chamber (1), the self-cleaning screw mechanism (5) is positioned in the drying chamber (1), the rotation driving mechanism (3) and the revolution driving mechanism (2) are connected with the self-cleaning screw mechanism (5) through the adapting mechanism (4), and the self-cleaning screw mechanism (5) comprises a screw blade (51) and a cleaning member fixed at the edge of the screw blade (51); wherein the rotation driving mechanism (3) is used for driving the self-cleaning screw mechanism (5) to rotate around the axis of the self-cleaning screw mechanism (5) so as to stir the radioactive resin, or the cleaning member is abutted against the heating inner wall (11) by utilizing rotation centrifugal force so as to remove the resin charring layer (6) on the heating inner wall (11) through knocking of the cleaning member and friction force, and the revolution driving mechanism (2) is used for driving the self-cleaning screw mechanism (5) to revolve around the central axis of the drying chamber (1); The cleaning member is a cleaning ring (52), a plurality of holes for installing the cleaning ring (52) are formed in the edge of the spiral blade (51), the holes are in one-to-one correspondence with the cleaning ring (52), and 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 with a stationary state, a stirring state, and a cleaning state; In the static state, the cleaning ring (52) naturally sags and is lapped on the hole edge of the spiral blade (51), and the self-cleaning spiral mechanism (5) keeps a safe distance from the heating inner wall (11); Under the stirring state, the rotation driving mechanism (3) operates in a first rotation speed range to drive the self-cleaning spiral mechanism (5) to rotate, so that the safety distance between the cleaning ring (52) and the heating inner wall (11) is shortened or the cleaning ring (52) is slightly contacted with the heating inner wall (11) to stir the radioactive resin between the spiral blades (51) and the heating inner wall (11), and meanwhile, the revolution driving mechanism (2) drives the self-cleaning spiral mechanism (5) to revolve around the central axis of the drying chamber (1); under the cleaning state, the rotation driving mechanism (3) operates in a second rotating speed range to drive the self-cleaning spiral mechanism (5) to rotate, so that the cleaning ring (52) is abutted against the heating inner wall (11) to remove the resin charring layer (6) on the heating inner wall (11) through knocking and friction, and simultaneously, the revolution driving mechanism (2) drives the self-cleaning spiral mechanism (5) to rotate around the heating inner wall (11); wherein the maximum value of the first rotational speed range is smaller than the minimum value of the second rotational speed range; 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 contacting the heating inner wall (11).
2. The radioactive resin treatment apparatus according to claim 1, wherein the cleaning member is kept at a safe distance from the heating inner wall (11) in a stationary state and is abutted against the heating inner wall (11) by a rotation centrifugal force when the self-cleaning screw mechanism (5) rotates.
3. The radioactive resin treatment device according to claim 1, wherein the adapting mechanism (4) is a gear axial transmission mechanism, the self-cleaning screw mechanism (5) further comprises 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 with the autorotation 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 screw blade (51) to realize autorotation, the screw blade (51) is fixed on the rotating shaft (54) and spirally distributed along the axial direction of the rotating shaft (54), and the screw pitches of the screw blade (51) on the axial direction of the rotating shaft (54) are the same.
4. The radioactive resin treatment apparatus according to claim 1, wherein the number of cleaning rings (52) satisfies the following relationship: ; Wherein, the Representing the number of cleaning rings (52), Represents the axial length of the heating inner wall (11), Representing a side length projection of the cleaning ring (52) in an axial direction of the heating inner wall (11), the side length projection of the cleaning ring (52) refers to a projection value of an edge of the cleaning ring (52) along the axial direction of the heating inner wall (11).
5. The radioactive resin treatment apparatus according to claim 4, wherein an arrangement length of the cleaning rings (52) is the same as an axial length of the heating inner wall (11), the arrangement length being an arrangement total length of the cleaning rings (52) along the spiral blade (51) in an axial direction of the heating inner wall (11), the cleaning rings (52) being uniformly spaced at edges of the spiral blade and being continuously arranged in the axial direction.
6. A method of treating a radioactive resin, using the radioactive resin treatment apparatus according to any one of claims 1 to 5, comprising: S11, injecting radioactive resin into a drying chamber, heating the heating inner wall of the drying chamber through a hot oil heating pipeline, starting a revolution driving mechanism to drive a self-cleaning screw mechanism to revolve around the heating inner wall, controlling the self-cleaning screw mechanism to run in a first rotation speed range, enabling the self-cleaning screw mechanism to rotate positively around the axis of the self-cleaning screw mechanism and stirring the radioactive resin; S12, after the stirring of the radioactive resin is completed, periodically controlling the rotation driving mechanism to operate in a second rotating speed range, enabling a cleaning ring in the self-cleaning spiral mechanism to be abutted against the heating inner wall of the drying chamber under the action of rotation centrifugal force, starting the revolution driving mechanism, enabling the self-cleaning spiral mechanism to rotate at least one circle along the heating inner wall, and adjusting the rotation driving mechanism to operate in the first rotating speed range so as to complete the drying of the radioactive resin; Wherein the maximum value of the first rotational speed range is smaller than the minimum value of the second rotational speed range.
7. The method for treating a radioactive resin according to claim 6, further comprising, after drying the radioactive resin: S13, stopping the circulation of the hot oil in the hot oil heating pipeline, opening a discharge ball valve, controlling the autorotation driving mechanism to run in the first rotating speed range, and enabling the self-cleaning spiral mechanism to reversely rotate around the axis of the self-cleaning spiral mechanism so as to convey the dried radioactive resin to a discharge port and discharge the radioactive resin out of the drying chamber; S14, after discharging is completed, the discharging ball valve is closed, the rotation driving mechanism is controlled to operate in the second rotating speed range, the self-cleaning spiral mechanism is enabled to rotate reversely around the axis of the self-cleaning spiral mechanism, meanwhile, the revolution driving mechanism is started, the self-cleaning spiral mechanism is enabled to rotate at least one circle along the heating inner wall, and the flushing water pipeline is started to clear residues on the inner wall of the drying chamber.

Description

Radioactive resin treatment device and method Technical Field The invention relates to the technical field of radioactive resin treatment, in particular to a radioactive resin treatment device and method. Background In the operation process of the nuclear power plant, the waste resin has a certain radioactivity, so that the waste resin needs to be dried by a conical dryer for the nuclear resin. The nuclear resin conical dryer mainly adopts a hot oil heating mode, so that heat is conducted to the inner wall of the dryer and further transferred to the resin, and further, the heating and drying of the resin are realized. However, during long-term operation of the resin cone dryer for nuclear use, the resin tends to form a resin carbonized layer on the inner wall of the resin cone dryer for nuclear use at high temperature. The resin charring layer is thick, has larger thickness and can seriously obstruct heat transfer, so that the drying efficiency of the conical dryer for nuclear resin is gradually reduced, and the energy consumption is continuously increased. Currently, the design of cone dryers for nuclear resins is often equipped with a water spray cleaning function in order to remove the resin char layer of the inner wall by rinsing. However, when the resin carbonized layer is thicker and has stronger adhesiveness, the resin carbonized layer is difficult to effectively remove by simply relying on water spraying cleaning, and the cleaning effect is poor. Disclosure of Invention The invention solves the problem of how to realize the efficient cleaning of the resin carbonized layer in the radioactive resin drying process. In order to solve the problems, the invention provides a radioactive resin treatment device and a radioactive resin treatment method. In one aspect, the invention provides a radioactive resin treatment device, which comprises a drying chamber, a revolution driving mechanism, a rotation driving mechanism, an adapting mechanism and a self-cleaning spiral mechanism, wherein a heating inner wall for heating radioactive resin is arranged on the side wall of the drying chamber, the self-cleaning spiral mechanism is positioned in the drying chamber, the rotation driving mechanism and the revolution driving mechanism are connected with the self-cleaning spiral mechanism through the adapting mechanism, and the self-cleaning spiral mechanism comprises a spiral blade and a cleaning member fixed on the edge of the spiral blade; The self-cleaning spiral mechanism is used for stirring the radioactive resin, or the cleaning member is enabled to be abutted against the heating inner wall by utilizing a self-rotation centrifugal force, so that the resin carbonization layer on the heating inner wall is knocked and/or removed by friction force through the cleaning member, and the revolution driving mechanism is used for driving the self-cleaning spiral mechanism to revolve around the central axis of the drying chamber. Optionally, the cleaning member maintains a safe distance from the heating inner wall in a stationary state, and abuts against the heating inner wall by utilizing a rotation centrifugal force when the self-cleaning screw mechanism rotates. Optionally, the adapting mechanism is a gear axial transmission mechanism, the self-cleaning screw mechanism further comprises 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 with the rotation driving 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 screw blade to realize rotation, the screw blade is fixed on the rotating shaft and distributed spirally along the axial direction of the rotating shaft, and the screw pitches of the screw blade on the axial direction of the rotating shaft are identical. Optionally, the cleaning member is a cleaning ring, the edge of the spiral blade is provided with a plurality of holes for installing the cleaning ring, the holes are in one-to-one correspondence with the cleaning ring, and the cleaning ring is rotatably installed on the edge of the spiral blade through the holes. Optionally, the cleaning ring is a polygonal ring body with a central opening, and an edge of the polygonal ring body is a working surface contacting the heating inner wall. Optionally, the number of cleaning rings satisfies the following relationship: n≥L/l; 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 rings in the axial direction of the heating inner wall, and the side length projection of the cleaning rings refers to the projection value of the edge of the cleaning rings along the axial direction of the heating inner wall. Optionally, the arrangement length of the cleaning rings