Quantitative fluoride taking device

Abstract

The invention belongs to the technical field of isotope separation, and relates to a fluoride quantitative taking device. The device comprises an evacuation line, a purging line and a material taking line. The device can be configured with different container connection modes according to material taking objects, and the containers comprise a 8L container and a 3m < 3 > container. In the material taking process of the 8L container, an operator only needs to ensure that the container has enough liquid nitrogen for freezing, the liquid level of the liquid nitrogen does not need to be recorded and maintained, and quantitative material taking of the container can be achieved according to mass accumulation of the thermal mass flow meter. In the calibration process of the material taking metering tool of the 3m < 3 > container, the 3m < 3 > container does not need to be disassembled and assembled, and the calibration workload is reduced. The electric control valve is placed in front of the thermal gas mass flow meter, so that the measurement error of the mass flow meter is reduced, the inlet pressure of the material taking container is ensured to be at the level required by the process, and condensation and accumulation of a product medium at the inlet of the container cannot be caused.

Description

Technical Field

[0001] This application belongs to the field of isotope separation technology and relates to a fluoride quantitative sampling device. Background Technology

[0002] In the field of isotope separation, low-temperature air-cooled boxes are commonly used to freeze 3m³ of [something]. 3 The container is used to quantitatively collect the low-abundance fluoride product generated during separation. In certain specific cases, an 8L container is used to quantitatively collect the low-abundance product. Because the collected product is quantitative, the liquid nitrogen level must be maintained at the position recorded before collection throughout the entire collection process. Using the 8L container method for quantitative product collection often results in the collected amount being lower or higher than the target value due to inaccurate or untimely liquid nitrogen level maintenance. This necessitates repeated collection or dispensing by the operator, increasing workload and reducing efficiency. A 3m... 3 When the container collects low-abundance products, 3m 3 The container is placed on an electronic scale and frozen in a low-temperature air-cooled box. The weight of the product is recorded and fed back in real time by the electronic scale. In standardized factories, there are many electronic scales used to collect low-abundance products. Each electronic scale needs to be calibrated annually. Before calibration, the container must be removed from the electronic scale, and after calibration, the container must be put back on the electronic scale. This process involves 3m 3 The manual disassembly and assembly of containers involves a large amount of work. Summary of the Invention

[0003] The purpose of this application is to design a fluoride quantitative dispensing device, which adds new equipment to the dispensing pipeline to replace the 8L container and 3m... 3 The electronic scale used in the container handling system improves the handling efficiency of an 8L container and reduces the material handling capacity by 3m. 3 The purpose of manually disassembling and assembling containers.

[0004] Technical solution to achieve the purpose of this application:

[0005] This application provides a fluoride quantitative dispensing device, comprising:

[0006] The system consists of three parts: evacuation line, blowing line, and material handling line.

[0007] The material handling line includes a pipeline, a first valve, a first CPCA pressure gauge, an electric regulating valve, a second CPCA pressure gauge, a third CPCA pressure gauge, a thermal gas mass flow meter, a fourth valve, a fifth valve, and a square flange.

[0008] The first valve and the pipeline are connected by a flange to form a evacuation line, which is used to evacuate the system before material is taken out;

[0009] The second valve is connected to the pipeline via a flange to form a nitrogen purging line, which is used for venting protection during equipment maintenance or disassembly to prevent the leakage of harmful substances during maintenance or disassembly.

[0010] The first CPCA pressure gauge is connected to the pipeline and located between the third valve and the electric regulating valve to measure the initial pressure of the product medium entering the fluoride metering device.

[0011] The electric regulating valve is connected to the pipeline and is located between the first CPCA pressure gauge and the second CPCA pressure gauge. It is used to regulate the pressure of the product medium entering the thermal gas mass flow meter.

[0012] The second CPCA pressure gauge and the third CPCA pressure gauge are welded to the pipeline; the second CPCA pressure gauge is located after the electric regulating valve, and the third CPCA pressure gauge is located after the second CPCA pressure gauge.

[0013] The thermal gas mass flow meter is connected to the pipeline via a flange and is used to monitor the mass flow rate of the product medium.

[0014] The fourth and fifth valves are installed downstream of the thermal gas mass flow meter to cut off the system and prevent air from leaking into the equipment and pipelines in front of the fifth valve during disassembly of downstream components.

[0015] The square flange serves as a connection interface, connecting to an 8L container or a 3m... 3 The container forms a replaceable material handling module by connecting a flexible hose.

[0016] Optionally, the second CPCA pressure gauge monitors the pressure of the product medium while providing pressure feedback to the electric regulating valve to assist the electric regulating valve in controlling the pressure.

[0017] Optionally, the third CPCA pressure gauge serves as a reference pressure gauge to compare with the second CPCA pressure gauge and determine whether its display is accurate.

[0018] Optionally, the thermal gas mass flow meter has a measurement range of 0–100 g / s and a measurement accuracy of ±0.5%, and is used to replace electronic scales to achieve quantitative measurement of materials.

[0019] Optionally, the electric regulating valve is used in conjunction with a thermal gas mass flow meter to stabilize the pressure of the product medium passing through the thermal gas mass flow meter, ensure the accuracy of the thermal gas mass flow meter measurement, and prevent the product medium from condensing and accumulating at the inlet of the feed container.

[0020] Optionally, the fluoride metering device can be configured with different container connection methods according to the material being metered, including 8L containers and 3m containers. 3 container.

[0021] Optionally, when taking material from the 8L container, the container is placed in a Diva bottle containing liquid nitrogen and connected to a square flange via a connecting hose to maintain the liquid nitrogen level at 1 / 2 to 2 / 3 of the bottle body;

[0022] In 3m 3 When unloading the container, the container is placed in a low-temperature air-cooled box, placed on a container support, and connected to a square flange via a connecting hose to maintain the temperature of the low-temperature air-cooled box within the range of -25±3℃.

[0023] The beneficial technical effects of this application are as follows:

[0024] (1) The thermal mass flow meter used is suitable for the product medium, with a flow rate range of 0-100 g / s and a measurement accuracy of 0.5%. It can monitor and accumulate the mass flow rate of the product medium per second, achieving accurate weighing. During material removal from the 8L container, the operator only needs to ensure sufficient liquid nitrogen for freezing; there is no need to record or maintain the liquid nitrogen level. Quantitative material removal from the container can be achieved based on the mass accumulation from the thermal mass flow meter. At 3m... 3 The calibration process for container material handling and metering tools does not require 3m 3 The container was disassembled and reassembled, reducing the workload of calibration.

[0025] (2) Place the electric regulating valve before the thermal gas mass flow meter to stabilize the pressure of the product medium passing through the thermal mass flow meter, provide a stable and continuous fluid for the flow meter, reduce the measurement error of the mass flow meter, and ensure that the inlet pressure of the feed container is at the level required by the process, so as not to cause condensation and accumulation of the product medium at the inlet of the container. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a fluoride metering device for dispensing fluoride from an 8L container.

[0027] Figure 2 A fluoride metering device for 3m 3 A schematic diagram of the container's material handling structure;

[0028] In the picture:

[0029] 1-First valve, 2-Second valve, 3-Third valve, 10-Fourth valve, 11-Fifth valve, 5-Pipeline, 4-First CPCA pressure gauge, 7-First CPCA pressure gauge, 8-First CPCA pressure gauge, 6-Electric regulating valve, 9-Thermal gas mass flow meter, 12-Square flange, 13-8L container, 14-Diva bottle, 15-Connecting hose, 16-Cryogenic air-cooled box, 17-Container support, 18-Container valve itself, 19-3m 3 container. Detailed Implementation

[0030] To enable those skilled in the art to better understand this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described below are only a part of the embodiments of this application, and not all of them. Based on the embodiments described in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] See Figures 1-2 A fluoride metering device, comprising:

[0032] The system consists of three parts: evacuation line, blowing line, and material handling line.

[0033] The material intake line includes a pipe 5, a first valve 3, a first CPCA pressure gauge 4, an electric regulating valve 6, a second CPCA pressure gauge 7, a third CPCA pressure gauge 8, a thermal gas mass flow meter 9, a fourth valve 10, a fifth valve 11, and a square flange 12.

[0034] The first valve 1 and the pipeline 5 are connected by a flange to form a evacuation line, which is used to evacuate the system before material is taken out;

[0035] The second valve 2 and the pipeline 5 are connected by a flange to form a nitrogen purging line, which is used for venting protection during equipment maintenance or disassembly to prevent the leakage of harmful substances during maintenance or disassembly.

[0036] The first CPCA pressure gauge 4 is connected to the pipeline 5 and located between the third valve 3 and the electric regulating valve 6, and is used to measure the initial pressure of the product medium entering the fluoride metering device;

[0037] The electric regulating valve 6 is connected to the pipeline 5 and is located between the first CPCA pressure gauge 4 and the second CPCA pressure gauge 7. It is used to regulate the pressure of the product medium entering the thermal gas mass flow meter 9.

[0038] The second CPCA pressure gauge 7 and the third CPCA pressure gauge 8 are welded to the pipe 5; the second CPCA pressure gauge 7 is located after the electric regulating valve 6, and the third CPCA pressure gauge 8 is located after the second CPCA pressure gauge 7.

[0039] The thermal gas mass flow meter 9 is connected to the pipeline 5 via a flange and is used to monitor the mass flow rate of the product medium.

[0040] The fourth valve 10 and the fifth valve 11 are installed downstream of the thermal gas mass flow meter 9 to cut off the system and prevent air from leaking into the equipment and pipeline 5 at the front end of the fifth valve 11 during the disassembly of the downstream components.

[0041] The square flange 12 serves as a connection interface, connecting to the 8L container 13 or 3m... 3 The container 19 forms a replaceable material handling module by connecting the hose 15.

[0042] Optionally, while monitoring the product medium pressure, the second CPCA pressure gauge 7 provides pressure feedback to the electric regulating valve 6 to assist the electric regulating valve 6 in controlling the pressure; if the pressure display of the second CPCA pressure gauge 7 or the third CPCA pressure gauge 8 reaches the set value, it indicates that the electric regulating valve 6 is working normally.

[0043] Optionally, the third CPCA pressure gauge 8 serves as a reference pressure gauge to compare with the second CPCA pressure gauge 7 in order to determine whether its display is accurate.

[0044] Optionally, the thermal gas mass flow meter 9 has a measurement range of 0–100 g / s and a measurement accuracy of ±0.5%, and is used to replace electronic scales to achieve quantitative measurement of materials.

[0045] Optionally, the electric regulating valve 6 is used in conjunction with the thermal gas mass flow meter 9 to stabilize the pressure of the product medium passing through the thermal gas mass flow meter 9, ensure the accuracy of the measurement by the thermal gas mass flow meter 9, and prevent the product medium from condensing and accumulating at the inlet of the feed container.

[0046] Optionally, the fluoride metering device can be configured with different container connection methods according to the material being metered, including an 8L container 13 and a 3m container. 3 Container 19.

[0047] Optionally, when taking material from the 8L container 13, the container is placed in the Diva bottle 14 containing liquid nitrogen and connected to the square flange 12 via the connecting hose 15 to maintain the liquid nitrogen level at 1 / 2 to 2 / 3 of the bottle body.

[0048] In 3m 3 When container 19 is unloading material, it is placed in low-temperature air-cooled box 16 and placed on container support 17. It is connected to square flange 12 through connecting hose 15 to maintain the temperature of low-temperature air-cooled box 16 within the range of -25±3℃.

[0049] The device is used as follows:

[0050] When collecting product media in the 8L container, first place the 8L container 13 into the Diva bottle 14 containing liquid nitrogen, keep the container valve 18 closed and freeze it fully for 2 hours, and connect the 8L container 13 to the square flange 12 through the connecting hose 15; check that the second valve 2 and the third valve 3 are closed, the electric regulating valve 6 is fully open, the first CPCA pressure gauge 4, the second CPCA pressure gauge 7, and the third CPCA pressure gauge 8 are working normally, the thermal gas mass flow meter 9 is working normally, and the fourth valve 10 and the fifth valve 11 are open;

[0051] Open the first valve 1 and use the evacuation equipment to evacuate the material receiving device to below 26.6 Pa. Close the first valve 1 and observe the pressure change through the first CPCA pressure gauge 4. Perform a large leak check on the material receiving device. The qualified standard is ΔP = 0 Pa / 30 min.

[0052] Then close the electric regulating valve 6, open the inlet valve 18 of the 8L container 13, and then open the third valve 3. Observe the pressure rise of the first CPCA pressure gauge 4, which indicates that the product medium is flowing into the material handling device.

[0053] Set the electric regulating valve 6 to regulate the pressure within the range of 4–6 kPa. Observe the pressure display of the second CPCA pressure gauge 7 or the third CPCA pressure gauge 8 to reach the set value, indicating that the electric regulating valve 6 is working normally. After the accumulated mass of the heated gas mass flow meter 9 reaches the target value, close the third valve 3. After the electric regulating valve 6 is fully open and the reading of the first CPCA pressure gauge 4 no longer changes, close the container valve 18 of the 8L container 13. During material handling, maintain the liquid nitrogen level in the Diva bottle 14 at 1 / 2–2 / 3 of the bottle body.

[0054] Finally, open the second valve 2, purge with nitrogen gas at approximately 3 kPa, close the second valve 2, let stand for 5 minutes, then open the first valve 1 to evacuate to below 26.6 Pa, and close the first valve 1. Repeat this operation 3–5 times to complete the purging of the material handling device. Then remove the 8L container 13 to end the material handling operation.

[0055] In 3m 3 When the container receives the product medium, first put the 3m 3 Container 19 is placed in the low-temperature air-cooled box 16 and placed on the container support 17. The container valve 18 is kept closed and the container is fully frozen for 8 hours. A 3m hose is then connected to the container. 3 Container 19 is connected to square flange 12;

[0056] Check that valves 2 and 3 are closed, electric regulating valve 6 is fully open, pressure gauges 4, 7, and 8 are working normally, thermal gas mass flow meter 9 is working normally, and valves 10 and 11 are open.

[0057] Open the first valve 1 and use the evacuation equipment to evacuate the material taking device to below 26.6 Pa. Close the first valve 1 and observe the pressure change through the first CPCA pressure gauge 4. The material taking device is checked for major leakage and passes the inspection (ΔP = 0 Pa / 30 min).

[0058] Then fully open the electric regulating valve 6, opening 3m. 3 Open the inlet valve 18 of container 19, then open the third valve 3, and observe the pressure rise of the first CPCA pressure gauge 4, indicating that the product medium is flowing into the material handling device.

[0059] After the accumulated mass of the heated gas mass flow meter 9 reaches the target value, close the third valve 3. After the reading of the first CPCA pressure gauge 4 stops changing, close the inlet valve 18 of the 3m³ container 19 to end the material handling operation. During the material handling process, maintain the temperature of the low-temperature air-cooled box 16 at -25±3℃.

[0060] Finally, when 3m 3 When container 19 needs to be removed, open the second valve 2, purge with nitrogen gas at approximately 3 kPa, close the second valve 2, let stand for 5 minutes, open the first valve 1 to evacuate to below 26.6 Pa, and close the first valve 1. Repeat this operation 3–5 times to complete the purging of the connecting hose 15, then remove the 3m... 3 Container 19 was removed.

[0061] The present application has been described in detail above with reference to the accompanying drawings and embodiments. However, the present application is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present application. All content not described in detail in this application can be derived from existing technology.

Claims

1. A fluoride quantitative dispensing device, characterized in that, include: The system consists of three parts: evacuation line, blowing line, and material handling line. The material intake line includes a pipe (5), a first valve (3), a first CPCA pressure gauge (4), an electric regulating valve (6), a second CPCA pressure gauge (7), a third CPCA pressure gauge (8), a thermal gas mass flow meter (9), a fourth valve (10), a fifth valve (11), and a square flange (12). The first valve (1) and the pipeline (5) are connected by a flange to form a vacuum line, which is used to evacuate the system before material is taken out; The second valve (2) and the pipeline (5) are connected by a flange to form a nitrogen purging line, which is used for venting protection during equipment maintenance or disassembly to prevent the leakage of harmful substances during maintenance or disassembly. The first CPCA pressure gauge (4) is connected to the pipeline (5) and located between the third valve (3) and the electric regulating valve (6) to measure the original pressure of the product medium entering the fluoride metering device; The electric regulating valve (6) is connected to the pipeline (5) and is located between the first CPCA pressure gauge (4) and the second CPCA pressure gauge (7) to regulate the pressure of the product medium entering the thermal gas mass flow meter (9); The second CPCA pressure gauge (7) and the third CPCA pressure gauge (8) are welded to the pipe (5); the second CPCA pressure gauge (7) is located after the electric regulating valve (6), and the third CPCA pressure gauge (8) is located after the second CPCA pressure gauge (7); The thermal gas mass flow meter (9) is connected to the pipeline (5) via a flange and is used to monitor the mass flow rate of the product medium. The fourth valve (10) and the fifth valve (11) are installed downstream of the thermal gas mass flow meter (9) to cut off the system and prevent air from leaking into the front end of the fifth valve (11) and the pipeline (5) when the downstream components are disassembled. The square flange (12) serves as a connection interface, connecting to an 8L container (13) or a 3m... 3 The container (19) forms a replaceable material handling module by connecting the hose (15).

2. The fluoride quantitative dispensing device according to claim 1, characterized in that, The second CPCA pressure gauge (7) monitors the pressure of the product medium and provides pressure feedback to the electric regulating valve (6) to assist the electric regulating valve (6) in controlling the pressure.

3. The fluoride quantitative dispensing device according to claim 1, characterized in that, The third CPCA pressure gauge (8) serves as a reference pressure gauge to compare with the second CPCA pressure gauge (7) in order to determine whether its display is accurate.

4. The fluoride quantitative dispensing device according to claim 1, characterized in that, The thermal gas mass flow meter (9) has a measurement range of 0–100 g / s and a measurement accuracy of ±0.5%, and is used to replace electronic scales to achieve quantitative measurement of materials.

5. The fluoride quantitative dispensing device according to claim 1, characterized in that, The electric regulating valve (6) is used in conjunction with the thermal gas mass flow meter (9) to stabilize the pressure of the product medium passing through the thermal gas mass flow meter (9), ensure the accuracy of the thermal gas mass flow meter (9) measurement, and prevent the product medium from condensing and accumulating at the inlet of the feed container.

6. The fluoride quantitative dispensing device according to claim 1, characterized in that, The fluoride metering device can be configured with different container connection methods according to the material being metered. The containers include an 8L container (13) and a 3m container. 3 Container (19).

7. The fluoride quantitative dispensing device according to claim 6, characterized in that, When taking material from the 8L container (13), the container is placed in the Diva bottle (14) containing liquid nitrogen and connected to the square flange (12) through the connecting hose (15) to maintain the liquid nitrogen level at 1 / 2 to 2 / 3 of the bottle body; In 3m 3 When the container (19) is being unloaded, it is placed in the low-temperature air-cooled box (16) and placed on the container support (17). It is connected to the square flange (12) through the connecting hose (15) to maintain the temperature of the low-temperature air-cooled box (16) within the range of -25±3℃.

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