Uranium isotope separation feeding purification online turnover device

Abstract

The utility model belongs to the technical field of centrifugal uranium isotope separation, and particularly relates to an online turnover device for uranium isotope separation, feeding and purification. A material supply container A and a material supply container B are arranged in the material supply heating box body; a material supply container A valve and a material supply container B valve are respectively arranged on the material supply container A and the material supply container B; the branch pipe is connected with a valve of the feeding container A and a valve of the feeding container B, and the branch pipe is connected with a purification container online turnover pouring main pipe, a feeding main pipe and a purification main pipe through a purification container online turnover pouring valve, a feeding valve and a purification valve respectively; and the purification main pipe is connected with the 3MD purification container through a 3MD purification container inlet valve. According to the utility model, the frequency of a series of hidden dangers such as safety, quality and environmental protection caused by links such as disassembly and assembly is reduced, and the continuous, safe and reliable operation is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of centrifugal uranium isotope separation, and in particular relates to an online turnover device for uranium isotope separation, feeding and purification. Background Art

[0002] Currently, the raw materials supplied to the centrifuge cascade for domestically produced 1,000-ton centrifuge-based uranium isotope separation must be purified to remove light impurities such as hydrogen fluoride and air. This ensures that the light impurity content of the feed meets technical standards. The purification system consists of a main purification container and a purification evacuation section. The main feed purification container consists of a low-temperature air cooling box and related piping, valves, and automatic control instruments. Each low-temperature air cooling box is equipped with an electronic scale. During purification, materials containing light impurities must be collected through the feed purification pipeline into the main purification container 3MD container. The main purification container is cooled by a low-temperature air cooling box at -20°C to -30°C.

[0003] 3MD container is a low-pressure container made of 16MnDR material with a volume of 3.024m 3 Designed with a DN65 manual high-vacuum pressure-resistant valve, it is primarily used for primary purification vessels for uranium enrichment feed or abnormal loading containers for reclaiming systems. This vessel has a larger inlet valve diameter than other 3M vessels, enabling faster material collection and smoother material flow. The DN65 vacuum pressure-resistant valve also enables heated feeding.

[0004] When the main purification container is filled to a certain amount, it will naturally heat up and be purged repeatedly for more than 5 times. The connecting pipe of the container will be removed, the valve of the container will be plugged, and the container will be removed. The container will then be transferred to the feeding system and installed in the feeding heating box. The system will be fed after the vacuum measurement and purification are qualified. After the feeding of the container is completed and the pipeline is purged, the purification device will be reinstalled, the vacuum measurement and freezing measurement will be qualified, and it will enter the standby state. A complete cycle process is formed. The evacuation, purging, dismantling, installation of feeding, unloading, re-installation, and measurement operations of this cycle are complex, with high work difficulty and requirements. In particular, it requires the cooperation of multiple trades and the use of special equipment such as transfer equipment. It is necessary to design an online turnover cycle process for the purification main container to reduce the complexity of the purification operation, reduce the workload of on-site personnel, and improve work efficiency. Summary of the Invention

[0005] The purpose of the utility model is to provide an online turnover device for uranium isotope separation and purification, which can realize the turnover of the purification main container without the need for container disassembly and assembly operations.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:

[0007] A uranium isotope separation feed purification online turnover device, wherein a feed heating box is equipped with a feed container A and a feed container B, and feed container A and feed container B are respectively installed with a valve of feed container A and a valve of feed container B; a branch pipe is connected to the valve of feed container A and the valve of feed container B, and the branch pipe is respectively connected to the purification container online turnover discharge valve, the feed valve, and the purification valve with the purification container online turnover discharge main pipe, the feed main pipe, and the purification main pipe; the purification main pipe is connected to the 3MD purification container through the 3MD purification container inlet valve; the 3MD purification container is installed in a purification system hot and cold box, the 3MD purification container outlet valve on the 3MD purification container is connected to the purification container online turnover discharge main pipe, and the purification container online turnover discharge main pipe is connected to the evacuation main pipe through the evacuation valve.

[0008] The inlet valve of 3MD purification container adopts angle valve.

[0009] The outlet valve of 3MD purification container adopts angle valve.

[0010] The beneficial effects achieved by the utility model are:

[0011] This new system enables online turnover of the 3MD feed purification main container without disassembly. Based on a single 1,000-ton production capacity, it saves 204,000 yuan in labor and material costs annually. It also reduces the risk of material leakage due to air rupture, as well as the solid waste generated by replacing insulation layers, electric heating tapes, and equipment failure repairs. It also reduces the number of safety, quality, and environmental risks associated with disassembly and assembly, thereby increasing the continuous safety and reliability of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of an online turnover device for uranium isotope separation and purification;

[0013] In the figure: 1. Feed heating box; 2. Feed container A; 3. Feed container B; 4. Feed container A valve; 5. Feed container B valve; 6. Branch pipe; 7. Feed valve; 8. Feed main pipe; 9. Purification valve; 10. Purification main pipe; 11. Vacuum main pipe; 12. Vacuum valve; 13. 3MD purification container inlet valve; 14. 3MD purification container outlet valve; 15. 3MD purification container; 16. Purification system hot and cold box; 17. Purification container online turnover unloading main pipe; 18. Purification container online turnover unloading valve. DETAILED DESCRIPTION

[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] A uranium isotope separation and purification online circulation device includes a feed heating box 1 equipped with feed containers A2 and B3. Feed containers A2 and B3 are each equipped with a valve 4 for feed container A and a valve 5 for feed container B, respectively. A branch pipe 6 connects to valves 4 and 5 for feed container A and B, respectively. Branch pipe 6 is connected to a purification container online circulation discharge valve 18, a feed valve 7, and a purification valve 9, respectively, to a purification container online circulation discharge main pipe 17, a feed main pipe 8, and a purification main pipe 10. The purification main pipe 10 is connected to a 3MD purification container 15 via a 3MD purification container inlet valve 13. The 3MD purification container 15 is installed in a purification system hot / cold box 16. The 3MD purification container outlet valve 14 on the 3MD purification container 15 is connected to a purification container online circulation discharge main pipe 17, which is then connected to an evacuation main pipe 11 via an evacuation valve 12.

[0016] The 3MD online turnover in the present invention is mainly divided into a purification process and a backfeed process. The purification process is to use the feeding container A2 and the feeding container B3 in the feeding and heating box 1 to pass the light impurities with the material through the valve 4 of the feeding container A itself, the valve 5 of the feeding container B itself, the branch pipe 6, the purification valve 9, the purification main pipe 10, and the 3MD purification container inlet valve 13 into the 3MD purification container 15 refrigerated by the purification system hot and cold box 16 to condense the material, thereby achieving the purification and collection of the material. When the non-material gas in the refrigerated 3MD purification container 15 accumulates to a certain pressure, the 3MD purification container inlet valve 13 of the 3MD purification container 15 is closed, and the evacuation valve 12 on the evacuation main pipe 11 and the 3MD purification container outlet valve 14 of the 3MD purification container 15 are opened to evacuate the 3MD purification container 15. After completion, the evacuation line is closed, the purification line is opened, and the purification is continued until it is qualified. The backfeeding process is that after the 3MD purification container 15 reaches the filling capacity, the collected materials need to be supplied to the cascade to realize the container turnover process. The material in the 3MD purification container 15 is heated and sublimated into gas through the purification system hot and cold box 16, and the 3MD purification container outlet valve 14 of the 3MD purification container 15 is opened. Through the purification container online turnover unloading main pipe 17, the purification container online turnover unloading valve 18 and the feed valve 7 of the feed main pipe 8 are opened to feed the cascade. After the 3MD purification container 15 is emptied, the turnover process of using it as a new container is realized.

[0017] The 3MD purification container inlet valve 13 and the 3MD purification container outlet valve 14 of the present invention are designed as manual high-vacuum pressure-resistant valves (angle valves) suitable for environments ranging from -30°C to 80°C. This achieves the purpose of heating the material in the container to a maximum of 80°C, sublimating the material from solid to gas, and feeding it into the feeding unit for feeding. This avoids the potential danger of large amounts of material escaping from the pipeline after the valve is disassembled.

[0018] In the present invention, the hot and cold box 16 of the purification system is a hot and cold box that can achieve temperature control of -30 to 80 degrees Celsius. By realizing the dual functions of heating and cooling, the 3MD feeding purification container can realize the functions of collecting and transferring materials, ensuring online operation, reducing the human, financial and material expenses caused by disassembly and unloading, and improving the operating efficiency of the purification system. In the present invention, a self-limiting pipeline electric heating and insulation measures are newly designed in the pipeline between the purification container online turnover unloading main pipe 17 and the vacuum valve 12 and the 3MD purification container outlet valve 14 to ensure that the material is unobstructed during unloading. The online turnover process of the 3MD purification container is designed as empty container installation, measurement, standby, main container purification and material collection, stop collecting material, thawing, purification, purification effect judgment, trial feeding, feeding, no material judgment, and standby.

Claims

1. An online turnover device for uranium isotope separation and purification, characterized by: The feeding and heating box is equipped with feeding container A and feeding container B, and feeding container A and feeding container B are respectively equipped with feeding container A valve and feeding container B valve; the branch pipe is connected to the feeding container A valve and feeding container B valve, and the branch pipe is connected to the purification container online turnover unloading main pipe through the purification container online turnover unloading valve, the branch pipe is connected to the feeding main pipe through the feeding valve, and the branch pipe is connected to the purification main pipe through the purification valve; the purification main pipe is connected to the 3MD purification container through the 3MD purification container inlet valve; the 3MD purification container is installed in the purification system hot and cold box, the 3MD purification container outlet valve on the 3MD purification container is connected to the purification container online turnover unloading main pipe, and the purification container online turnover unloading main pipe is connected to the vacuum pipe through the vacuum valve.

2. The uranium isotope separation and purification online turnover device according to claim 1, characterized in that: The inlet valve of 3MD purification container adopts angle valve.

3. The uranium isotope separation and purification online turnover device according to claim 1, characterized in that: The outlet valve of 3MD purification container adopts angle valve.

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