A method and device for barreling radioactive resin after drying

Abstract

The present invention provides a method and device for barreling radioactive resin after drying, comprising the following steps: S1: an empty barrel with a top cover is transported to roller conveyor 1 at the entrance of a barreling device through a roller conveyor, and the electric airtight door at the entrance of the barreling device is opened; S2: roller conveyors 1 and 2 are started to transport the empty barrel to a capping position inside the barreling device; S3: the electric airtight door is closed to put the filling station in a completely sealed state; S5: after the capping is completed, roller conveyor 2 is started to transport the waste barrel to the resin filling position, and the waste barrel lifting device is started to make the empty barrel tightly docked with the top plate inside the filling device; the present invention can avoid the diffusion of aerosols during the barreling process through the airtight design of the barreling device, even if a small amount of gas overflows into the barreling device, due to the airtight design of the barreling device, the overflowed gas is directly discharged to the downstream exhaust gas treatment system through a pipeline, and will not cause any impact on the environmental area where the equipment is located.

Description

Technical Field

[0001] The invention belongs to the technical field of radioactive waste resin treatment, and relates to a barreling method and a device for radioactive resin after drying. Background Art

[0002] The radioactive waste resins produced by the third generation nuclear power plants before were all treated by cement solidification, but the waste packages produced were large in volume. Therefore, the radioactive waste resins from the third generation reactors are mainly stored by conical drying and barreling. After drying, the resins can be stored for a long time, the volume reduction ratio is improved, and the amount of waste packages produced is reduced. After the resin is dried and dehydrated, its volume is reduced and it is basically in the form of tiny particles. Traditionally, it is directly loaded into a 200L / 160L steel drum through a pipe at the bottom of the conical dryer. The schematic diagram is as follows Figure 2 As mentioned above, since the volume density of the resin decreases after drying, the tiny particles of resin are easy to generate dust or aerosol diffusion into the surrounding environment when filling the barrel. After the resin filling is completed, the unsealed waste barrels filled with resin are transported in the factory by rollers, and this transportation process will also generate a certain amount of aerosol diffusion. Summary of the invention

[0003] The object of the present invention is to provide a method and device for barreling radioactive resin after drying, so as to solve the problems raised in the above background technology.

[0004] The object of the present invention can be achieved by the following technical scheme: A method for barreling radioactive resin after drying, comprising the following steps:

[0005] S1: The empty barrel with the top cover is conveyed to the barrel loading device entrance roller conveyor 1 through the roller conveyor, and the electric airtight door of the barrel loading device entrance is opened;

[0006] S2: Roller 1 and roller 2 start to transport the empty barrels to the capping position inside the barrel filling device;

[0007] S3: The electric airtight door is closed, making the filling station completely sealed;

[0008] S4: Start the capping device to remove the cap from the waste barrel;

[0009] S5: After the cover is removed, the roller conveyor 2 is started to transport the waste barrel to the resin filling position, and the waste barrel lifting device is started to make the empty barrel tightly docked with the internal top plate of the filling device;

[0010] S6: Open the outlet valve of the conical dryer and the top inlet valve of the barrel loading device to load the resin. The resin loading can be judged whether it is completed based on the material level, liquid level and other sensors. After the loading is completed, the waste barrel lifting device stops lifting;

[0011] S7: Start roller conveyor 2 to transport the waste barrel containing resin to roller conveyor 1, start the capping device to cap the waste barrel;

[0012] S8: After the capping is completed, the electric airtight door at the inlet of the barrel loading device opens, and the capped waste barrel can be transported to the downstream system.

[0013] A device for barreling radioactive resin after drying, the device comprises the following components:

[0014] Roller table 1: used for conveying waste barrels, with forward and reverse functions, and integrated barrel in-place sensor. During the empty barrel conveying process, the in-place signal of the sensor is fed back to the control system, and the control system opens the electric lifting airtight door of the barrel loading device;

[0015] Roller 2: used for conveying waste barrels, with forward and reverse functions, integrated with a sensor for checking the barrel is in place, and integrated inside the entire device;

[0016] Waste barrel lifting device: After the waste barrel is in place, the lifting device lifts the waste barrel to make it tightly connected with the top sealing gasket in the barrel loading device, so as to reduce the diffusion of aerosol into the barrel loading device during the resin barrel loading process. The waste barrel lifting device can be pneumatic or electric, and is integrated inside the entire device;

[0017] Capping device: used for removing and capping the waste barrel lid. It can adopt pneumatic and electric design. When removing the lid, the hook can ensure that it will not fall in the event of power outage or gas failure. After the resin filling is completed, it will descend to cap the waste barrel. It is integrated on the top of the entire device.

[0018] Barrel filling device: It adopts airtight design and rectangular structure. The entrance is an electric lifting airtight door. It integrates roller conveyor 2, lifting device, capping device, resin filling inlet, exhaust outlet, and instrument sensor port. The pressure balance pipeline on the top of the barrel filling device is used to level the air pressure in the waste barrel and the conical dryer during the resin filling process. Multiple photoelectric switches are integrated inside the barrel filling device for positioning the waste barrel.

[0019] Compared with the prior art, the advantages of the method and device for barreling radioactive resin after drying in the present invention are: it is automatically controlled by a control program and does not require any on-site manual operation by personnel. The airtight design of the barreling device can avoid the diffusion of aerosols during the barreling process. Even if a small amount of gas overflows into the barreling device, due to the airtight design of the barreling device, the overflowed gas is directly discharged to the downstream waste gas treatment system through the pipeline, and will not cause any impact on the environmental area where the equipment is located. In addition, the barreling device is equipped with a waste barrel lid removal function, so it can ensure that the resin is sealed during transportation to other room areas in the factory after barreling, and there is no diffusion of aerosols. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The present invention is a schematic structural diagram of a method and device for barreling radioactive resin after drying.

[0021] Figure 2 It is a structural schematic diagram of the prior art of the present invention. DETAILED DESCRIPTION

[0022] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0023] like Figure 1 As shown, the present invention provides a method and device for barreling radioactive resin after drying.

[0024] 1. Roller table 1: used for conveying waste barrels, with forward and reverse functions, integrated with barrel in-place sensor. During the empty barrel conveying process, the in-place signal of the sensor is fed back to the control system, and the control system opens the electric lifting airtight door of the barrel loading device.

[0025] 2. Roller 2: Its function is similar to that of roller 1 and it is integrated inside the barrel loading device.

[0026] 3. Waste barrel lifting device: After the waste barrel is in place, the lifting device will lift the waste barrel so that it is tightly connected with the top sealing gasket in the barrel loading device to reduce the diffusion of aerosol into the barrel loading device during the resin barrel loading process. The waste barrel lifting device can be pneumatic or electric and is integrated inside the barrel loading device.

[0027] 4. Capping device: used to remove and cap the waste barrel. It can be pneumatic or electric. When removing the cap, the hook can ensure that it will not fall in the event of power failure or gas failure. After the resin filling is completed, it will descend to cap the waste barrel. It is integrated on the top of the barrel loading device.

[0028] 5. Bucketing device: It adopts airtight design, rectangular structure, electric lifting airtight door at the entrance, integrated roller 2, lifting device, capping device, resin filling inlet, exhaust outlet, instrument sensor port, etc. The overall barreling device adopts airtight design, generally less than -1000Pa. If the negative pressure of the downstream exhaust gas treatment system exceeds this value, the filling station body can be equipped with an air intake regulating valve or the airtightness of the filling station can be improved. The barreling device is made of stainless steel, with a rectangular structure and polished surface, which is easy to decontaminate. When the internal parts of the filling station need to be repaired, the inspection door can be opened for operation. The pressure balance pipeline at the top of the barreling device is used to level the air pressure in the waste barrel and the conical dryer during the resin filling process. Multiple photoelectric switches are integrated inside the filling station for positioning the waste barrel.

[0029] Process Description:

[0030] The empty barrels with top covers are transported to the barrel loading device entrance roller conveyor 1 via roller conveyors;

[0031] The electric airtight door at the entrance of the barrel loading device is opened;

[0032] Roller 1 and roller 2 start to transport the empty barrels to the capping position inside the barrel filling device;

[0033] The electric airtight door is closed, making the filling station completely sealed;

[0034] Start the capping device to remove the cap from the waste barrel;

[0035] After the cap is removed, roller conveyor 2 is started to transport the waste barrel to the resin filling position;

[0036] Start the waste barrel lifting device to make the empty barrel tightly dock with the top plate inside the filling device;

[0037] Open the outlet valve of the conical dryer and the top inlet valve of the barrel filling device to load the resin;

[0038] The resin filling can be judged whether it is completed according to the material level, liquid level and other sensors. After the filling is completed, the waste barrel lifting device stops lifting;

[0039] Start roller conveyor 2 to transport the waste barrel containing resin to roller conveyor 1;

[0040] Start the capping device to cap the waste barrel;

[0041] After the capping is completed, the electric airtight door at the inlet of the barrel loading device opens, and the capped waste barrel can be transported to the downstream system.

[0042] Example

[0043] The radioactive waste treatment plant of a nuclear power plant uses the equipment of the present invention to barrel and store the resin dried by the conical dryer.

[0044] 1. The 200L empty barrel with the top cover is transported to the roller conveyor 1 at the entrance of the barrel loading device through the roller conveyor;

[0045] 2. The electric airtight door at the entrance of the barrel loading device is opened;

[0046] 3. Roller 1 and roller 2 start to transport the empty barrels to the capping position inside the barrel filling device;

[0047] 4. The electric airtight door is closed, making the filling station completely sealed;

[0048] 5. Start the capping device to remove the cap from the 200L barrel;

[0049] 6. After the cover is removed, start roller conveyor 2 to transport the waste barrel to the resin filling position;

[0050] 7. Start the waste barrel lifting device to make the empty barrel tightly dock with the top plate inside the filling device;

[0051] 8. Open the outlet valve of the conical dryer and the top inlet valve of the barrel filling device to load the resin;

[0052] 9. Judge that barrel filling is completed according to the liquid level switch on the top of the barrel filling device and close the valve;

[0053] 10. After filling is completed, the waste barrel lifting device stops lifting;

[0054] 11. Start roller conveyor 2 and transport the waste barrel containing resin to roller conveyor 1;

[0055] 12. Start the capping device to seal the waste barrel;

[0056] 13. After the capping is completed, the electric airtight door at the entrance of the barrel loading device opens, and the capped waste barrel can be transported to the downstream roller system.

[0057] It has been verified that there is no diffusion of any aerosol during the resin filling and in-factory transportation, which improves the environment of the room where the equipment is located and ensures reliable operation of the equipment.

[0058] The contents not described in detail in this specification belong to the prior art known to the professional and technical personnel in the field. The specific embodiments described herein are merely examples of the spirit of the present invention. The technical personnel in the technical field to which the present invention belongs can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, but they will not deviate from the spirit of the present invention or exceed the scope defined by the attached claims.

Claims

1. A method for barreling radioactive resin after drying, characterized in that: The following steps are involved: S1: The empty barrel with the top cover is conveyed to the barrel loading device entrance roller conveyor 1 through the roller conveyor, and the electric airtight door of the barrel loading device entrance is opened; S2: Roller 1 and roller 2 start to transport the empty barrels to the capping position inside the barrel filling device; S3: The electric airtight door is closed, making the filling station completely sealed; S4: Start the capping device to remove the cap from the waste barrel; S5: After the cover is removed, the roller conveyor 2 is started to transport the waste barrel to the resin filling position, and the waste barrel lifting device is started to make the empty barrel tightly docked with the internal top plate of the filling device; S6: Open the outlet valve of the conical dryer and the top inlet valve of the barrel filling device to load the resin. The resin loading can be judged whether it is completed according to the material level sensor and the liquid level sensor. After the loading is completed, the waste barrel lifting device stops lifting; S7: Start roller conveyor 2 to transport the waste barrel containing resin to roller conveyor 1, start the capping device to cap the waste barrel; S8: After the capping is completed, the electric airtight door at the inlet of the barrel loading device opens, and the capped waste barrel can be transported to the downstream system.

2. A device for barreling radioactive resin after drying, characterized in that: The device includes the following components: Roller table 1: used for conveying waste barrels, with forward and reverse functions, and integrated barrel in-place sensor. During the empty barrel conveying process, the in-place signal of the sensor is fed back to the control system, and the control system opens the electric lifting airtight door of the barrel loading device; Roller 2: used for conveying waste barrels, with forward and reverse functions, integrated with a sensor for checking the barrel is in place, and integrated inside the entire device; Waste barrel lifting device: After the waste barrel is in place, the lifting device lifts the waste barrel to make it tightly connected with the top sealing gasket in the barrel loading device, so as to reduce the diffusion of aerosol into the barrel loading device during the resin barrel loading process. The waste barrel lifting device can be pneumatic or electric, and is integrated inside the entire device; Capping device: used for removing and capping the waste barrel lid. It can adopt pneumatic and electric design. When removing the lid, the hook can ensure that it will not fall in the event of power outage or gas failure. After the resin filling is completed, it will descend to cap the waste barrel. It is integrated on the top of the entire device. Barrel filling device: It adopts airtight design and rectangular structure. The entrance is an electric lifting airtight door. It integrates roller conveyor 2, lifting device, capping device, resin filling inlet, exhaust outlet, and instrument sensor port. The pressure balance pipeline on the top of the barrel filling device is used to level the air pressure in the waste barrel and the conical dryer during the resin filling process. Multiple photoelectric switches are integrated inside the barrel filling device for positioning the waste barrel.

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