8L container automatic cleaning system and method

Abstract

The invention provides an automatic cleaning system and method for an 8L container. The system comprises a code scanning module used for scanning a two-dimensional code of an 8L container to identify correlation information of the container; the interlocking control module is used for opening the waste liquid receiving tanks and the trapping tanks of the corresponding abundance groups according to the abundance of the container, and closing the waste liquid receiving tanks and the trapping tanks of other abundance groups at the same time; the information management module is used for distributing a unique code for each 8L container and associating real-time data with operator information; and the tracing module is used for tracing related persons in charge according to the recorded real-time data and the associated operator information. According to the invention, the problem of waste liquid channeling or leakage is effectively avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of radioactive waste treatment, and particularly relates to an 8L container automatic cleaning system and method. BACKGROUND

[0002] In the nuclear industry field, uranium enrichment production is an important link for obtaining nuclear fuel, and in the production process, the 8L container used is contaminated due to contact with uranium hexafluoride, and needs to be cleaned regularly to maintain its use performance and safety. At present, the cleaning production equipment of the 8L container mainly depends on a complex, multi-step manual and automatic combined equipment. Although the equipment meets the cleaning demand to a certain extent, due to the lack of effective protection measures and information tracing system, there is a risk of radioactive waste liquid leakage, which threatens the environment and personnel safety. SUMMARY

[0003] The application provides an 8L container automatic cleaning system to solve the defect of radioactive waste liquid leakage caused by the existing container cleaning production line in the prior art.

[0004] An 8L container automatic cleaning system, comprising:

[0005] An information management module is used to allocate a unique code for each 8L container to record relevant information carried by the unique code, and the relevant information includes: enrichment, medium, tare weight, and charge weight; real-time data of the container in the cleaning, liquid injection, and liquid discharge operation process are recorded; the real-time data are uniquely associated with the identity information of the personnel performing the operation; the real-time data include: the time when the container enters each plant, modification record, and modification time;

[0006] An authority control module is used to set relevant information that can be modified by each plant;

[0007] A code scanning module is used to scan the two-dimensional code of the 8L container to identify the relevant information carried by the unique code;

[0008] A tracing module is used to trace the relevant person in charge according to the recorded real-time data and the associated operator information;

[0009] An interlocking control module is used to open the waste liquid receiving tank and the capture tank of the corresponding enrichment group according to the enrichment of the container, and to close the waste liquid receiving tank and the capture tank of other enrichment groups; wherein the waste liquid receiving tank is used to receive the main waste liquid generated in the cleaning process; the capture tank is used to capture volatile gas or aerosol in the cleaning process; and the waste liquid receiving tank includes: a group II waste liquid receiving tank and a group III waste liquid receiving tank.

[0010] Further, the 8L container automatic cleaning system described above further comprises:

[0011] a weighing module for weighing the weight of each container and calculating the residual material amount of the container according to the weight and the tare weight identified by the code scanning module;

[0012] a temporary storage module for comparing the current residual material amount of the container with the last process residual material amount recorded by the information management module and the maximum limit value of the residual material amount of the corresponding container type set by the system, and defining the container as a qualified container and temporarily storing it in a designated area if the current residual material amount is consistent with the last process residual material amount and is not greater than the maximum limit value of the residual material amount set by the system, and temporarily storing unqualified containers in an unqualified area.

[0013] Further, the 8L container automatic cleaning system as described above further comprises: a fully enclosed cleaning cabinet for cleaning the containers; and the interlocking control module is electrically connected with all groups of waste liquid receiving grooves and capture grooves in the fully enclosed cleaning cabinet.

[0014] Further, the 8L container automatic cleaning system as described above, the fully enclosed cleaning cabinet is provided with a double-container cleaning rack, which can accommodate two 8L containers for rotating cleaning at the same time.

[0015] Further, the 8L container automatic cleaning system as described above, the fully enclosed cleaning cabinet is provided with a self-sealing valve pipe connection mechanism, which is designed by combining a self-sealing valve and a soft pipe, realizing single disassembly and multiple operations of the container valve.

[0016] When the self-sealing valve pipe connection mechanism is used for liquid injection, the container valve is upwardly connected with the self-sealing valve master head on the upper part of the cleaning rack, realizing liquid injection at one end and air exhaust at the other end; when the self-sealing valve pipe connection mechanism is used for waste liquid discharge, the container is inverted and connected with the self-sealing valve master head on the lower part, one side is connected with compressed air, and the other side is connected with liquid discharge.

[0017] Further, the 8L container automatic cleaning system as described above further comprises an outer surface metering detection device, which detects the outer surface of the container in a spiral upward manner at a fixed distance of 10mm from the container wall to determine whether the outer surface of the container is contaminated by radioactive waste liquid.

[0018] Further, the 8L container automatic cleaning system as described above further comprises a tray transportation module for transporting the containers placed on the tray between operation processes; the operation processes include unloading, freezing, cleaning, transportation, drying, assembly, and vacuum leak detection; each tray can place 4 8L containers.

[0019] Further, the 8L container automatic cleaning system as described above, a distilled water- hot pressure air pipeline is arranged in the fully enclosed cleaning cabinet, the distilled water- hot pressure air pipeline is arranged above the washing area, and is used for flushing and blow drying after valve cleaning.

[0020] Further, the 8L container automatic cleaning system as described above, the fully enclosed cleaning cabinet is further provided with an alkali cleaning tank, an acid cleaning tank and a water cleaning tank, and the alkali cleaning tank, the acid cleaning tank and the water cleaning tank are used for cleaning the valve removed from the container.

[0021] An 8L container automatic cleaning method, comprising the following steps:

[0022] Step 1: The contaminated 8L container is transported from the truck to the cleaning plant, and after unloading, it is sent to the electronic scale at the weighing post;

[0023] Step 2: Scan the 8L container's two-dimensional code to obtain the container medium, abundance, tare weight and material weight;

[0024] Step 3: Obtain the weight of the container through the electronic scale, and transmit the weight information to the system. The system analyzes the weight information, two-dimensional code information and the maximum residual material amount limit, and stores the qualified containers in the designated area and the unqualified containers in the unqualified area. The qualified 8L containers are stored in a tray with four containers, and the container medium and abundance in the same tray are the same. The tray is transported to the specified position in the storage area by AGV, and the coordinates of the tray are recorded;

[0025] Step 4: After the system issues the cleaning task for the day, the AGV takes out the corresponding tray at the specified coordinate position and sends it to the RGV connection position;

[0026] Step 5: The RGV takes the tray with qualified containers to the air-cooled box for freezing, so that the container is frozen to below -20℃;

[0027] Step 6: The RGV takes out the frozen container and sends it to the entrance of the fully enclosed cleaning cabinet, and scans the code again to confirm the container abundance before entering the cleaning cabinet;

[0028] Step 7: Open the waste liquid receiving tank and the capture tank of the corresponding abundance group, and keep the waste liquid receiving tank and the capture tank of other abundance groups closed;

[0029] Step 8: After the cleaning cabinet is opened, the gantry robot grabs two containers onto the double-container cleaning rack, and the RGV sends the remaining two containers back to the air-cooled box;

[0030] Step 9: Manually install the self-sealing valve male head of the self-sealing valve pipe mechanism, open the 8L container inlet and outlet valves, the truss robot grabs the cleaning rack and implants it into the rotating mechanism, and connects the self-sealing valve female head above the cleaning rack. Inject 4-6L of production water through one side of the self-sealing valve, and exhaust on the other side. The liquid injection side and the exhaust side are separated by the self-sealing valve;

[0031] Step 10: The rotating mechanism rotates ±180° or 360° for hydrolysis, with a rotation speed of 90-110° / s;

[0032] Step 11: After hydrolysis is completed, the 8L container is kept upside down, the self-sealing valve female head at the lower part of the container is connected, one side of the ground pipe is injected with 0.3MPa compressed air, and the other side is connected with the liquid discharge pipe to discharge the waste liquid into the corresponding waste liquid receiving tank of the group;

[0033] Step 12: Add the prepared 5% sodium carbonate solution and 33.5% hydrogen peroxide to the 8L container, and rotate the container for alkaline washing. The alkaline washing process is repeated 3-5 times;

[0034] Step 13: Alkaline washing waste liquid is collected into the II group or III group waste liquid storage tank according to different abundance groups;

[0035] Step 14: Add water to the container and rotate the container for water washing. The water washing process is repeated 2 times;

[0036] Step 15: Water washing waste liquid is collected into the II group or III group waste water storage tank according to different abundance groups;

[0037] Step 16: The truss robot transports the rotating cleaning rack to the installation pressure measuring connector station, disassembles the container valve, and sequentially cleans the disassembled valve in the alkaline cleaning tank, acid cleaning tank, and water washing tank;

[0038] Step 17: Check the surface corrosion, scratches, pits, and container inner surface cleanliness of the cleaned container and valve. The qualified container is subjected to hydrostatic test, and the unqualified container is transferred to the manual post for inspection and repair in the workshop;

[0039] Step 18: The disassembled container valve is placed in the cleaning basket, only one set of valve of a container is placed in each cleaning basket, each cleaning basket is numbered for distinction, the cleaning basket is transported by the small truss to above the valve cleaning tank, and the valve is sequentially subjected to alkaline cleaning, acid cleaning, water washing, distilled water flushing, and drying;

[0040] Step 19: The dried valve and cleaning basket are placed in the specified position of the corresponding 8L container tray and sent to the drying oven together;

[0041] Step 20: after the container is cleaned and the quality inspection is completed, the self-sealing pressure valve joint is installed, and the container is transferred to the pressure testing station by the gantry robot to perform a water pressure test at a pressure of 2.8 MPa; after the water pressure test is completed, the pressure is vented and distilled water is used to wash the inside of the container, and then the pressure joint is manually removed and the container is dried with hot pressure air;

[0042] Step 21: the dried container is grabbed by the mechanical arm and placed on the AGV trolley, and then sent out of the cleaning cabinet; the outer surface measurement detection device is used to detect the outer surface of the container at a fixed distance of 10 mm from the container wall and in a spiral ascending manner to determine whether the outer surface of the container is contaminated by radioactive waste liquid; the qualified container is grabbed by the mechanical arm and sent into the oven for drying, and the unqualified container is returned to the manual wiping station of the cleaning cabinet, and the surface of the container is wiped by the manual operation and then subjected to the outer surface measurement inspection;

[0043] Step 22: the 8L container is sent to the oven for baking for 24 hours at a temperature of 100℃±5℃;

[0044] Step 23: the baked container is transferred to the installation and repair room by the AGV trolley for assembly and vacuum leak detection, and the qualified container after the leak detection is transferred to the clean temporary storage area by the AGV trolley for temporary storage, and is periodically transferred by the assisted balance hoist vehicle.

[0045] The 8L container automatic cleaning system and method provided by the application can automatically collect the waste liquid after the container is cleaned according to different abundance groups, so that the waste liquid of different abundance groups does not mix, reduces the risk of nuclear criticality safety, and lays a foundation for the subsequent product classification of uranium recovery. On the other hand, the electronic management of the whole life cycle information of the container is realized, and through the tracing mode, each operation can be traced to the specific person in charge, so as to improve the accuracy and safety of information management, and effectively avoid the problems of waste liquid mixing or leakage caused by human errors. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 The structure block diagram of the 8L container automatic cleaning system provided by the application is shown in the figure;

[0047] Figure 2 The top view of the self-sealing valve joint mechanism provided by the application is shown in the figure;

[0048] Figure 3 The front view of the self-sealing valve joint mechanism provided by the application is shown in the figure;

[0049] Reference signs:

[0050] 1-self-sealing valve female head; 2-self-sealing valve male head. DETAILED DESCRIPTION

[0051] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the present application will be described clearly and completely below in combination with the drawings in the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0052] Figure 1 The structure block diagram of the 8L container automatic cleaning system provided by the present application is shown in Figure 1 The system comprises:

[0053] The information management module is used for allocating a unique code for each 8L container to record the relevant information carried by the unique code, and the relevant information comprises: abundance, medium, tare weight, charge weight; recording real-time data of the container in the cleaning, liquid injection and liquid discharge operation process; and uniquely corresponding and associating the real-time data with the identity information of the personnel performing the operation; the real-time data comprises: the time when the container enters each factory building, modification record and modification time.

[0054] Specifically, the system allocates a unique two-dimensional code or bar code for each 8L container as an identifier, which is bound with the information of the container such as abundance, medium, tare weight, charge weight, etc. By scanning the code, the relevant information of the container can be quickly obtained. Moreover, the information management module can also record the real-time data of the container in the cleaning, liquid injection, liquid discharge and other operation processes, including operation time, operation type, medium flow, temperature, pressure and other key parameters. At the same time, it can also record the time when the container enters each factory building, modification record and modification time, etc., to ensure the integrity and accuracy of the information. In addition, the information management module can automatically uniquely correspond and associate the real-time data with the identity information of the personnel performing the operation through biometric identification (such as fingerprint, facial recognition) or electronic badge authentication. In this way, when problems occur in the operation process, the responsible person can be quickly located. In the later stage of tracing the responsible person, through the container code or personnel ID number, the detailed data record of the container or personnel in each operation link can be quickly queried.

[0055] The system provided by the present application allocates a unique code for each 8L container through the information management module, realizing the electronic management of the information in the whole life cycle of the container. The system can record the real-time data of the container in the cleaning, liquid injection, liquid discharge and other operation processes, and uniquely correspond and associate these data with the identity information of the personnel performing the operation, thereby ensuring the traceability and accuracy of the information.

[0056] The permission control module is used for setting the relevant information that can be modified in each factory building.

[0057] The code scanning module is configured to scan a two-dimensional code of the 8L container to identify relevant information of the container, wherein the relevant information includes abundance, medium, tare weight, and material weight.

[0058] Specifically, the code scanning module can access the background information of the 8L container by scanning the code. The information includes but is not limited to: material type, [U 235 ] abundance, container tare weight, and container residual material amount.

[0059] The traceability module is configured to trace relevant responsible persons according to recorded real-time data and associated operator information.

[0060] Specifically, the system provided by the present application assigns a unique two-dimensional code / bar code (associated with the factory number) to each 8L container through the information management module, realizing electronic management of the whole life cycle information of the container. The system records the dynamic information of the container from the factory to the scrap, and ensures the accuracy of the information through permission control, face recognition and other technical means. In the later stage, the operation of each step can be traced to the specific responsible person through the traceability mode, so as to improve the accuracy and safety of information management, and effectively avoid the problem of waste liquid diversion or leakage caused by human error.

[0061] Specifically, each 8L container is associated with a two-dimensional code or a bar code and a container itself factory number. The container number association information in the system includes: container medium, abundance, tare weight, material weight, container entering each factory name, entering factory time, and verification information operator information, modification container information operator information and time, leaving factory time. The recorded information is in chronological order. The permission of the modifiable information is set according to each factory. For example, in the cleaning factory, only the tare weight and material weight of the container can be modified, and the medium, abundance and material weight of the container can be modified in the last process material receiving factory. The modification information personnel are bound to the modification information and the modification time through face recognition. For example, the system automatically records the entering time, factory name and operator information by scanning the two-dimensional code of the container. After the container is cleaned, the operator logs in through face recognition, modifies the tare weight and material weight, and the system automatically records the modification time and personnel. In the material receiving factory, if it is found that the medium is not consistent, the material receiving operator modifies the medium and abundance, and the system generates a modification log. If the material weight data is found to be abnormal, the modification record can be queried through the traceability module to locate the responsible person and the operation time.

[0062] The interlocking control module is configured to open the waste liquid receiving tank and the capture tank of the corresponding abundance group according to the abundance of the container, and close the waste liquid receiving tank and the capture tank of other abundance groups; wherein the waste liquid receiving tank is configured to receive the main waste liquid generated in the cleaning process; the capture tank is configured to capture volatile gas or aerosol in the cleaning process; and the waste liquid receiving tank includes a group II waste liquid receiving tank and a group III waste liquid receiving tank.

[0063] Specifically, when the system issues a daily cleaning task, the AGV takes out the corresponding tray at the specified tray coordinate position and sends it to the RGV docking position. The RGV has telescopic forks and can automatically fork the container tray to the air-cooled box for freezing. The container is frozen to below-20 DEG C. The RGV takes out the container and sends it into the cleaning cabinet. Then, the 8L container that has completed freezing is automatically transported by the RGV (rail-guided vehicle) trolley to the specified position below the loading port of the cleaning cabinet. Before the container enters the cleaning cabinet, the fixed code scanner reads the container two-dimensional code to obtain the container abundance information. The system automatically opens the liquid inlet valve of the corresponding group of waste liquid receiving tank and capture tank according to the abundance. The liquid inlet valves of other groups remain closed to prevent cross contamination, thereby avoiding the risk of radioactive waste liquid cross-contamination.

[0064] The system provided by the application achieves the purpose of collecting waste liquid after container cleaning according to different abundance groups through the interlocking control module, so that the waste liquid of different abundance groups does not cross-contaminate, thereby laying a foundation for subsequent product classification of uranium recovery.

[0065] Further, the system provided by the application further comprises a weighing module for weighing the weight of each container and calculating the residual amount of the container according to the weight and the tare weight identified by the code scanning module.

[0066] Specifically, the contaminated container is transported into the cleaning plant by a truck, unloaded and sent to the electronic scale at the weighing post. The weighing module weighs the weight of each container through the electronic scale and compares the weight with the tare weight in the two-dimensional code information to calculate the residual amount.

[0067] The temporary storage module compares the current residual amount of the container with the last process residual amount recorded by the information management module and the maximum residual amount limit of the corresponding container type set by the system in advance, respectively. If the current residual amount is consistent with the last process residual amount and is not greater than the maximum residual amount limit set by the system, the container is defined as a qualified container and temporarily stored in a specified area, and the unqualified container is temporarily stored in an unqualified area.

[0068] Specifically, the temporary storage module compares the calculated current residual amount with the last process residual amount recorded by the information management module and the maximum residual amount limit of the corresponding container type set by the system in advance, respectively. If the current residual amount is consistent with the last process residual amount and is not greater than the maximum residual amount limit set by the system, the container is marked as a qualified container and sent to a specified position in the temporary storage area. The container with a residual amount higher than the maximum limit is unqualified and is not received and is sent to an unqualified area. The qualified 8L container is temporarily stored in a tray with four containers, and the container medium and abundance in the same tray are the same. The AGV transports the tray to the specified position in the temporary storage area and records the tray coordinates.

[0069] The present application manages the information in the whole life cycle of the 8L container through the information management module, avoids the previous manual information checking work, reduces the human factor failure, and makes each step of information operation traceable to the person in charge through the traceability module. Through the permission control module, the information that can be operated by each factory building can be controlled, thereby reducing the interference of irrelevant information and the possibility of input information failure of personnel. The face recognition and information interlocking avoid the possibility of replacement operation and avoid responsibility disputes.

[0070] Further, the system provided by the present application further comprises: a fully-closed cleaning cabinet body for cleaning the container; and an interlocking control module electrically connected with all groups of waste liquid receiving grooves and capture grooves in the fully-closed cleaning cabinet body.

[0071] Specifically, the fully-closed cleaning cabinet body provided by the present application can clean the container in a closed environment, significantly reducing the need for manual operation, reducing the risk of direct contact between the operator and radioactive substances, and improving the safety of the cleaning process. In addition, through the fully-closed design, the leakage of radioactive waste liquid and volatile gas generated during the cleaning process into the external environment can be effectively prevented, protecting the safety of the operator and reducing environmental pollution.

[0072] Further, the fully-closed cleaning cabinet body provided by the present application is provided with a double-container cleaning rack, which can accommodate two 8L containers for rotating cleaning at the same time.

[0073] Specifically, the system provided by the present application can clean two containers at the same time through the double-container cleaning rack arranged in the fully-closed cleaning cabinet body, thereby greatly improving the cleaning efficiency of the container.

[0074] Further, the fully-closed cleaning cabinet body is provided with a self-sealing valve pipe connection mechanism, which is designed by combining a self-sealing valve and a soft pipe connection mechanism, realizing single disassembly and multiple operations of the container valve; when the self-sealing valve pipe connection mechanism is used for liquid injection, the container valve is upwardly connected to the self-sealing valve head on the upper part of the cleaning rack, realizing liquid injection at one end and air exhaust at the other end; when waste liquid is discharged, the container is inverted and connected to the lower self-sealing valve head, one side is connected to compressed air, and the other side is connected to liquid discharge.

[0075] Specifically, the self-sealing valve pipe connection mechanism is as shown in Figure 2 , Figure 3The self-sealing valve has the characteristics of good sealing performance and simple operation, and can realize the control of the liquid in and out without disassembling the container valve. The hose connection self-sealing valve male head 2 is connected with the container valve, has good flexibility and corrosion resistance, and can adapt to the liquid transmission demand of the container in different positions (such as upright and inverted). When filling liquid, the container is kept in an upright state, the container valve is upward, the self-sealing valve male head 2 is communicated with the self-sealing valve female head 1, and the liquid injection is realized. At the same time, the self-sealing valve on the other side serves as an exhaust port to ensure that the gas in the container is smoothly discharged and pressure accumulation is avoided. When discharging waste liquid, the container is placed in an inverted state, the container valve is downward, the self-sealing valve male head 2 is communicated with the self-sealing valve female head 1 at the lower part of the cleaning rack, one side is connected with compressed air to provide power for discharging liquid, and the other side serves as a waste liquid discharge port to smoothly discharge the waste liquid in the container.

[0076] The system provided by the present application realizes the purpose of automatic liquid injection and discharge multiple times through the self-sealing valve connection mechanism, so that the single disassembly of the container valve can complete multiple cleaning operations, thereby significantly improving the cleaning efficiency and reducing the labor intensity of the operator.

[0077] Further, the system provided by the present application further comprises: an outer surface metering detection device, which detects the outer surface of the container at a fixed distance of 10 mm from the container wall and in a spiral ascending manner to determine whether the outer surface of the container is contaminated by radioactive waste liquid.

[0078] Specifically, the portable outer surface contamination measuring device is used to detect the movement of the 8L container along the spiral ascending track at a fixed distance of 10 mm from the container wall. The spiral ascending track combined with the fixed distance of 10 mm can accurately cover all the outer surface areas of the container and avoid omission.

[0079] Further, the system provided by the present application further comprises a tray transportation module, which is used to transport the containers placed on the tray between operation processes; the operation processes include: unloading, freezing, cleaning, transportation, drying, assembly and vacuum leak detection; each tray can prevent four 8L containers.

[0080] Specifically, the tray transportation module is specially designed for optimizing the transfer of 8L containers between cleaning, drying, assembly and vacuum leak detection operation processes. By using a tray as a transportation carrier, not only the transportation efficiency is improved, but also the stability and safety of the container during the transfer process are ensured.

[0081] The tray transportation module runs through the entire container processing process, specifically including but not limited to the following links:

[0082] Unloading link: After the contaminated containers transported by trucks arrive at the cleaning plant, the operators use forklifts or hoisting equipment to unload the entire tray of containers from the truck and directly send them to the weighing post for electronic weighing.

[0083] Freezing link: The container tray that has passed the electronic weighing is transported by automatic transportation equipment (such as AGV or RGV) to the freezing area for freezing treatment to ensure that the internal temperature of the container is reduced to below the specified standard.

[0084] Cleaning link: The container tray that has completed freezing is transported to the front of the cleaning cabinet, and after the container information is confirmed by scanning the code, the container is grabbed by the gantry robot to the cleaning rack for cleaning operation.

[0085] Transportation link: The container tray that has completed cleaning is transported by the transportation equipment to the drying area or the next processing link to ensure smooth connection of the entire process.

[0086] Drying link: The container tray enters the oven for drying treatment to ensure that the inside and outside of the container meet the drying standard.

[0087] Assembly link: The container tray that has completed drying is transported to the assembly area for reassembly of the container and the valve.

[0088] Vacuum leak detection link: The container tray that has completed assembly enters the vacuum leak detection equipment for vacuum leak rate detection to ensure that the container has good sealing performance and no leakage risk.

[0089] The system provided by the application realizes quick and stable transfer of containers between various links through the tray transportation module, significantly improves the overall cleaning efficiency of the containers, and reduces manual intervention and loss during transportation, effectively reducing production costs.

[0090] Further, the application also provides a distillation water-thermal pressure air pipeline in the fully enclosed cleaning cabinet, which is arranged above the washing area and used for flushing and drying the 8L container and the valve after cleaning.

[0091] Specifically, the disassembled container valve needs to be finally flushed and dried by using distilled water and thermal pressure air. At this time, the distillation water-thermal pressure air pipeline located above the washing area plays a key role. Through this pipeline, distilled water and thermal pressure air can be conveniently introduced to thoroughly flush and dry the cleaned valve, thereby ensuring the cleanliness and dryness of the valve and meeting the subsequent use requirements. This design not only improves the efficiency and quality of valve cleaning, but also helps to prevent the spread and pollution of radioactive waste liquid.

[0092] Further, the full-closed cleaning cabinet is further provided with an alkali cleaning tank, an acid cleaning tank and a water cleaning tank.

[0093] Specifically, the alkali cleaning tank, the acid cleaning tank and the water cleaning tank are arranged in the full-closed cleaning cabinet, and the three cleaning tanks jointly constitute a complete valve cleaning system, which is specially used for completely cleaning the valve removed from the 8L container.

[0094] The alkali cleaning tank, the acid cleaning tank and the water cleaning tank arranged in the full-closed cleaning cabinet constitute an efficient and environmentally-friendly valve cleaning system.

[0095] The application further provides an 8L container automatic cleaning method, which comprises the following steps:

[0096] Step 1: the contaminated 8L container is transported by a truck to a cleaning plant, and after unloading, it is sent to an electronic scale at a weighing post;

[0097] Step 2: the two-dimensional code of the 8L container is scanned to obtain the container medium, the abundance, the tare weight and the material weight;

[0098] Step 3: the weight of the container is obtained through the electronic scale, and the weight information is transmitted to the system; the system analyzes the weight information, the two-dimensional code information and the maximum residual material amount limit value, temporarily stores the qualified containers in a specified area, and temporarily stores the unqualified containers in an unqualified area; the qualified 8L containers are temporarily stored in a tray with four containers, and the container medium and the abundance in the same tray are the same; the tray is transported to a specified position in the temporary storage area by an AGV, and the coordinates of the tray are recorded;

[0099] Step 4: after the system issues a cleaning task for the day, the AGV takes out the corresponding tray at the specified coordinate position and sends it to an RGV connection position;

[0100] Step 5: the RGV forks the tray with the qualified containers to a freeze tank to freeze the containers to below-20 DEG C;

[0101] Step 6: the RGV takes out the frozen containers and sends them to the entrance of the full-closed cleaning cabinet, and scans the code again to confirm the container abundance before entering the cleaning cabinet;

[0102] Step 7: the waste liquid receiving tank and the capture tank of the corresponding abundance group are opened, and the waste liquid receiving tanks and the capture tanks of other abundance groups are kept closed;

[0103] Step 8: After the washing cabinet is opened, the truss robot grabs two containers onto the double-container washing rack, and the AGV sends the remaining two containers back to the air-cooled box;

[0104] Step 9: Manually install the self-sealing valve male connector of the self-sealing valve connector mechanism, open the 8L container inlet and outlet valves, the truss grabs the washing rack and implants the rotating mechanism, and connects the self-sealing valve female connector above the washing rack. Inject 4-6L of production water through one side of the self-sealing valve, and exhaust on the other side. The liquid injection side and the exhaust side are separated from the self-sealing valve door;

[0105] Step 10: The rotating mechanism rotates ±180° or 360° for hydrolysis, with a rotation speed of 90-110° / s;

[0106] Step 11: After hydrolysis is completed, keep the 8L container upside down, connect the self-sealing valve female connector at the lower part of the container, inject 0.3MPa compressed air on one side of the ground pipe, and connect the other side with the liquid discharge pipe to discharge the waste liquid into the corresponding group of waste liquid receiving tanks;

[0107] Step 12: Add the prepared 5% sodium carbonate solution and 33.5% hydrogen peroxide to the 8L container, and rotate the container for alkaline washing. The alkaline washing process is repeated 3-5 times;

[0108] Step 13: Alkaline washing waste liquid is collected into group II or group III waste liquid storage tank according to different abundance groups;

[0109] Step 14: Add water to the container and rotate the container for water washing. The water washing process is repeated 2 times;

[0110] Step 15: Water washing waste liquid is collected into group II or group III waste water storage tank according to different abundance groups;

[0111] Step 16: The truss robot transfers the rotating washing rack to the installation pressure measuring connector station, disassembles the container valve, and sequentially cleans the disassembled valve in the alkali cleaning tank, acid cleaning tank, and water washing tank;

[0112] Step 17: Check the surface corrosion, scratches, pits, and internal surface cleanliness of the cleaned container and valve. The qualified container is subjected to water pressure test, and the unqualified container is transferred to the manual post for inspection and sent to the repair plant;

[0113] Step 18: The disassembled container valve is placed in a cleaning basket, only one set of valve of a container is placed in each cleaning basket, each cleaning basket is numbered for distinction, the cleaning basket is transported by a small truss to above the valve cleaning tank, and the valve is sequentially subjected to alkali cleaning, acid cleaning, water washing, distilled water flushing, and drying;

[0114] Step 19: The dried valve and the cleaning basket are placed in the specified position of the corresponding 8L container tray and sent to the drying oven together.

[0115] Step 20: After the container is cleaned and quality checked, the self-sealing pressure valve joint is installed, and the container is transferred to the pressure testing station by the gantry robot to perform a water pressure test at a pressure of 2.8 MPa; after the water pressure test, the air pressure is discharged, the container is washed with distilled water, and then the pressure joint is manually removed and the container is dried with hot air;

[0116] Step 21: The dried container is grabbed by the mechanical arm and placed on the RGV trolley, and sent out of the cleaning cabinet. The outer surface of the container is detected by the outer surface measurement detection device at a fixed distance of 10 mm from the container wall and in a spiral upward manner to determine whether the outer surface of the container is contaminated by radioactive waste liquid. The qualified container is grabbed by the mechanical arm and sent to the oven for drying, and the unqualified container is returned to the manual wiping station of the cleaning cabinet. The surface of the container is wiped by hand, and then the outer surface measurement inspection is performed again;

[0117] Step 22: The 8L container is sent to the oven for baking for 24 hours at a temperature of 100℃±5℃;

[0118] Step 23: The baked container is transferred to the installation and repair room by the AGV trolley for assembly and vacuum leak detection. The container that passes the leak detection is transferred to the clean temporary storage area by the AGV trolley for temporary storage, and is periodically transferred by the assisted balance lifting vehicle.

[0119] The 8L container automatic cleaning method provided by the application has the following advantages:

[0120] 1. Transportation method: from unloading, freezing, cleaning, transportation, drying, assembly, vacuum leak detection, all in tray units, 4 8L containers are processed at a time, and the container center distance is 800mm, which is the nuclear critical safety distance. During transportation, the tray form is used instead of the 8L container safety cage. Therefore, the efficiency of transferring and disassembling the container is increased by more than 4 times the original process, the number of repetitive labor is reduced, and the disassembly work of the 8L container safety cage is cancelled.

[0121] 2. The 8L container injects cleaning agent, discharges liquid, air pressure drying, and pressure, all through the self-sealing valve into the container, so that only the self-sealing valve joint needs to be disassembled and assembled once, and multiple automatic liquid injection and discharge can be realized.

[0122] 3. Each 8L container has a QR code or barcode associated with its own serial number. The system associates the container number with the following information: container medium, abundance, tare weight, material weight, name of the plant it entered, entry time and verification personnel information, operator information and time for modifying container information, and departure time. Information is recorded chronologically. Access permissions for modifyable information are set for each plant. For example, in the cleaning plant, only the container tare weight and material weight can be modified; in the receiving plant of the previous process, the container medium, abundance, and material weight can be modified. Personnel modifying information are linked to the modified information and modification time via facial recognition. This allows the method provided by this invention to electronically manage information throughout the entire lifecycle of the 8L container, avoiding the previous manual verification work, reducing human error, and ensuring that each information operation is traceable to the responsible person. Controlling the operable information in each plant reduces interference from unrelated information and the possibility of personnel input errors. Facial recognition and information interlocking prevent the possibility of proxy operation and avoid liability disputes.

[0123] 4. Since self-sealing valves are used for hydrolysis, cleaning, pressurization, and drying, the two valves of the container are connected by hoses to install male self-sealing valve heads. Female self-sealing valve heads are installed on the upper and lower sides of the cleaning rack. When the cleaning fluid is input, the 8L container valve faces upwards and connects to the female self-sealing valve heads on the upper two sides, with one end for liquid inlet and the other for venting. When discharging waste fluid, the 8L container is inverted and connects to the self-sealing valve heads on the lower two sides, with one side receiving 0.3MPa compressed air and the other side discharging fluid. This overcomes the problems of inconsistent valve orientation in the 8L container and excessive machining errors in the valve thread interface. Furthermore, the orientation and position of the container's self-sealing valve are fixed, and the female end is connected to the male end through mechanical transmission devices such as lead screws, hydraulics, or cylinders. Multiple cleaning fluid injections and waste fluid discharges are all automated.

[0124] 5. Use air-cooled boxes instead of liquid nitrogen freezing to reduce the risk of frostbite to personnel.

[0125] 6. The portable external surface contamination measuring device is moved in a spiral motion 10mm away from the container wall, which can automatically determine whether the entire outer surface of the 8L container is contaminated by radioactive waste liquid during the cleaning process.

[0126] 7. Integrate the valve cleaning for the 8L container into the 8L container cleaning unit cabinet. Arrange the alkaline washing tank, acid washing tank, and water washing tank sequentially. A distilled water pipe and a hot-pressurized empty pipe are installed above the water washing tank. After disassembling, the 8L container valves are placed in cleaning baskets, with only one container's valve in each basket. Each cleaning basket is numbered for identification. The cleaning baskets are transported to the valve cleaning tank via a small truss, where they undergo alkaline washing, acid washing, water washing, distilled water rinsing, and drying in sequence. After drying, the valves and cleaning baskets are placed in their designated positions on the corresponding 8L container trays and sent to the drying oven. The 8L containers are cleaned with their valves attached. After cleaning, the valves must be removed before the hydrostatic test. Since the valves may contain radioactive waste, integrating the valve cleaning tank into the container cleaning cabinet prevents radioactive waste from dripping onto the ground outside the cleaning cabinet, thus preventing the spread of radioactive contamination.

[0127] 8. Before cleaning, scan the barcode again to confirm the container and interlock to open the inlet valve of the waste liquid storage tank corresponding to the enrichment group, while closing the inlet valves of other groups. This allows the method provided by the present invention to collect uranium-containing waste liquid according to different enrichment groups, ensuring that waste liquids of different enrichment groups do not cross-contaminate, thus laying the foundation for product classification in subsequent uranium recovery.

[0128] 9. The 8L container cleaning rack can accommodate two containers at the same time for simultaneous rotating cleaning, thus doubling the cleaning efficiency of 8L containers.

[0129] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automated cleaning system for an 8L container, characterized in that, include: Information Management Module: Used to assign a unique code to each 8L container to record the relevant information carried by the unique code, and to record the real-time data of the container during the cleaning, filling and draining operations, and to uniquely associate the real-time data with the identity information of the personnel performing the operation; The real-time data includes: the time when containers enter each plant, modification records and modification times; the correlation information; and the related information includes: abundance, medium, tare weight, and material weight. The access control module is used to set the relevant information that can be modified in each factory building; The scanning module is used to scan the QR code on the 8L container to identify the relevant information carried by the unique code; The traceability module is used to trace the responsible parties based on the recorded real-time data and associated operator information. An interlocking control module is used to open the waste liquid receiving tank and the collection tank of the corresponding abundance group according to the abundance of the container, and at the same time close the waste liquid receiving tank and the collection tank of other abundance groups; wherein, the waste liquid receiving tank is used to receive the main waste liquid generated during the cleaning process; the collection tank is used to capture volatile gases or aerosols during the cleaning process; the waste liquid receiving tank includes: Group II waste liquid receiving tank and Group III waste liquid receiving tank.

2. The 8L container automated cleaning system according to claim 1, characterized in that, Also includes: The weighing module is used to weigh each container and calculate the amount of residual material in the container based on the weight and the tare weight identified by the barcode scanning module. The temporary storage module is used to compare the current residual amount of the container with the residual amount of the previous process recorded by the information management module and the maximum residual amount limit set by the system for the corresponding container type. If the current residual amount is consistent with the residual amount recorded in the previous process and is not greater than the maximum residual amount limit set by the system, the container is defined as a qualified container and temporarily stored in the designated area, while unqualified containers are temporarily stored in the unqualified area.

3. The 8L container automated cleaning system according to claim 1, characterized in that, Also includes: A fully enclosed cleaning cabinet, used for cleaning containers; The interlocking control module is electrically connected to all groups of waste liquid receiving tanks and collection tanks inside the fully enclosed cleaning cabinet.

4. The 8L container automated cleaning system according to claim 3, characterized in that, The fully enclosed cleaning cabinet is equipped with a dual-container cleaning rack, which can simultaneously accommodate two 8L containers for rotating cleaning.

5. The 8L container automated cleaning system according to claim 3, characterized in that, The fully enclosed cleaning cabinet is equipped with a self-sealing valve connection mechanism. The self-sealing valve connection mechanism adopts a combination design of self-sealing valve and soft connection to realize single disassembly and assembly and multiple operation of container valve. When injecting liquid, the container valve faces upward and connects to the self-sealing valve head on the upper part of the cleaning rack, so that liquid can enter at one end and air can be released at the other end; when discharging waste liquid, the container is inverted and connects to the lower self-sealing valve head, with compressed air connected on one side and liquid discharged on the other.

6. The 8L container automated cleaning system according to claim 1, characterized in that, It also includes an external surface measurement and detection device, which measures the outer surface of the container at a fixed distance of 10 mm from the container wall and in a spiral upward manner to determine whether the outer surface of the container is contaminated by radioactive waste liquid.

7. The 8L container automated cleaning system according to claim 1, characterized in that, It also includes a pallet transport module for transporting containers placed on pallets between operational processes; the operational processes include: unloading, freezing, cleaning, transporting, drying, assembly, and vacuum leak testing; each pallet can hold four 8L containers.

8. The 8L container automated cleaning system according to claim 4, characterized in that, A distilled water-hot compressed air pipeline is installed inside the fully enclosed cleaning cabinet. The distilled water-hot compressed air pipeline is located above the water washing area and is used for rinsing and drying containers and valves after cleaning.

9. The 8L container automated cleaning system according to claim 1, characterized in that, The fully enclosed cleaning cabinet is also equipped with an alkaline cleaning tank, an acid cleaning tank, and a water washing tank, which are used to clean the valves that have been removed from the container.

10. An automated cleaning method for an 8L container, characterized in that, Includes the following steps: Step 1: Transport the contaminated 8L container by truck to the cleaning plant, unload it, and then send it to the weighing station's electronic scale; Step 2: Scan the QR code on the 8L container to obtain the container medium, abundance, tare weight, and material weight; Step 3: The weight of the container is obtained by electronic scale and transmitted to the system. The system analyzes the weight information, QR code information, and maximum allowable residual material limit, and temporarily stores qualified containers in a designated area and unqualified containers in an unqualified area. Among them, qualified 8L containers are temporarily stored in a pallet of 4, and the contents of the containers in the same pallet are the same in terms of medium and abundance. The AGV is used to transport the pallet to the designated location in the temporary storage area and the coordinates of the pallet are recorded. Step 4: After the system issues the cleaning task for the day, the AGV takes out the corresponding pallet at the designated coordinates and delivers it to the RGV docking position; Step 5: The RGV forks the pallet containing the qualified container and places it in the air-cooled box for freezing, so that the container is frozen to below -20°C; Step 6: The RGV removes the frozen container and sends it to the entrance of the fully enclosed cleaning cabinet. Before entering the cleaning cabinet, the container's fullness is confirmed again by scanning the barcode. Step 7: Open the waste liquid receiving tank and collection tank of the corresponding abundance group, while keeping the inlet valves of the waste liquid receiving tank and collection tank of other abundance groups closed; Step 8: After the cleaning cabinet door is opened, the gantry robot grabs two containers and places them on the double container cleaning rack. The RGV then sends the remaining two containers back into the air-cooled box. Step 9: Manually install the male self-sealing valve of the self-sealing valve connecting mechanism, open the inlet and outlet valves of the 8L container, insert the truss grabbing cleaning frame into the rotating mechanism, connect the female self-sealing valve above the cleaning frame, inject 4-6L of production water through one side of the self-sealing valve, and vent the air on the other side. The injection side and venting side pipes leave the self-sealing valve. Step 10: The rotating mechanism rotates ±180° or 360° to perform hydrolysis, with a rotation speed of 90-110° / s; Step 11: After hydrolysis, keep the 8L container upside down, connect the self-sealing valve at the bottom of the container, inject 0.3MPa compressed air into one side of the grounding pipe, and connect the other side to the drain pipe to discharge the waste liquid into the waste liquid receiving tank of the corresponding group. Step 12: Add the prepared 5% sodium carbonate solution and 33.5% hydrogen peroxide to an 8L container, and rotate the container to perform alkaline washing; repeat the alkaline washing process 3-5 times. Step 13: Alkaline washing waste liquid is collected into either Group II or Group III waste liquid storage tanks according to its abundance group; Step 14: Add water to the container, rotate the container to wash it, and repeat the washing process twice; Step 15: The washing waste liquid is collected into either Group II or Group III wastewater storage tanks according to its abundance group; Step 16: The gantry robot transports the rotating cleaning frame to the pressure testing joint installation station, disassembles the container valves, and cleans the disassembled valves in the alkaline cleaning tank, acid cleaning tank, and water washing tank in sequence. Step 17: Inspect the surface corrosion, scratches, pits, and cleanliness of the inner surface of the cleaned containers and valves. Containers that pass the inspection will undergo a water pressure test, while unqualified containers will be transferred to the manual work station and sent to the maintenance workshop. Step 18: Place the disassembled container valves into the cleaning basket. Only one container valve is placed in each cleaning basket. Each cleaning basket is numbered and distinguished. The cleaning baskets are transported to the top of the valve cleaning tank by a small truss. The valves are then subjected to an alkaline wash, acid wash, water wash, distilled water rinse, and drying operation in sequence. Step 19: After drying, the valve and cleaning basket are placed in the designated position on the corresponding 8L container tray and sent to the drying oven together; Step 20: After the container cleaning and quality inspection are completed, install the self-sealing pressure testing valve connector. The gantry robot will then transfer the valve to the pressure testing station for a hydrostatic test at a pressure of 2.8 MPa. After the hydrostatic test, the container will be drained by compressed air, and the inside of the container will be washed with distilled water. The pressure testing connector will then be manually removed, and the container will be dried with hot compressed air. Step 21: After drying, the container is picked up by a robotic arm and placed on an AGV trolley. It is then sent out of the cleaning cabinet. Using an external surface metering and detection device, the outer surface of the container is inspected at a fixed distance of 10mm from the container wall and in a spiral upward motion to determine whether the outer surface of the container is contaminated by radioactive waste liquid. Qualified containers are picked up by the robotic arm and sent to the drying oven for drying. Unqualified containers are returned to the manual wiping station in the cleaning cabinet. After the container surface is wiped by a person, the external surface metering and inspection is carried out again. Step 22: The 8L container is placed in an oven and baked for 24 hours at a temperature of 100℃±5℃; Step 23: After baking, the containers are transferred to the installation and maintenance room by AGV cart for assembly and vacuum leak testing. After passing the leak test, the containers are transferred to the clean temporary storage area by AGV cart and periodically transferred by assisted balance crane.

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