Laser preparation device

Abstract

The utility model discloses a laser preparation device. The laser preparation device comprises a laser conversion device and a laser purification device, wherein the laser conversion device comprises a dissolving container and suction filtration equipment; the dissolving container is integrated with an ultrasonic vibration heating unit, a feeding unit is arranged outside the dissolving container, and a separation unit is arranged at a discharge port of the dissolving container; the feeding unit is connected with the dissolving container; the input end of the separation unit is connected with the discharge hole of the dissolving container, and the output end of the separation unit is provided with suction filtration equipment; the input end and the output end of the suction filtration equipment are respectively connected with the separation unit and the radium purification device. According to the laser preparation device, the ultrasonic vibration heating unit is integrated in the dissolving container, mass transfer can be enhanced through mechanical vibration, the reaction rate can be increased through heating, a liquid film on the surface of radium sulfate is damaged through the ultrasonic cavitation effect, diffusion of carbonate ions is accelerated, and heating is matched to promote chemical reaction equilibrium to move in the direction of generating radium carbonate; therefore, the conversion rate is improved, and the problems that an existing device is low in conversion efficiency and incomplete in conversion are solved.

Description

Technical Field

[0001] This utility model relates to the field of radium preparation technology, specifically to a radium preparation apparatus, and more particularly to an apparatus for preparing a high-purity radium nitrate solution using insoluble radium sulfate as a raw material. Background Technology

[0002] In the fields of nuclear medicine, radiochemistry, and materials science, radium (Ra) is an important radioactive nuclide, and its preparation technology has always been a research hotspot. Radium is commonly found in insoluble radium salts (such as radium sulfate), which require chemical conversion and purification to obtain high-purity soluble radium solutions (such as radium nitrate). However, existing preparation processes, based on the metathesis reaction of insoluble radium sulfate and sodium carbonate (RaSO4 + Na2CO3 → RaCO3↓ + Na2SO4), are limited by solid-liquid mass transfer efficiency. Traditional stirring and heating methods require more than 24 hours to complete the conversion, and because a reaction hindrance layer easily forms on the surface of radium sulfate, the conversion is incomplete (resulting in a high concentration of residual sulfate ions). Utility Model Content

[0003] In view of this, this application provides a radium preparation apparatus to solve the problem that the existing preparation process is limited by the solid-liquid mass transfer efficiency due to the metathesis reaction of insoluble radium sulfate and sodium carbonate, resulting in low conversion efficiency and incomplete conversion.

[0004] A radium preparation apparatus includes a radium conversion device and a radium purification device:

[0005] The radium conversion device includes a dissolution container and a filtration device;

[0006] The dissolving container is equipped with an ultrasonic vibration heating unit, a feeding unit is provided outside the dissolving container, and a separation unit is provided at the outlet of the dissolving container.

[0007] The feeding unit is connected to the dissolving container;

[0008] The input end of the separation unit is connected to the outlet of the dissolving container, and the output end of the separation unit is equipped with a filtration device.

[0009] The input and output ends of the filtration device are respectively connected to the separation unit and the radium purification device.

[0010] Preferably, the radium purification apparatus includes a radium solution collector, a syringe pump system, a separation column, a rinsing unit, and a product collector;

[0011] The input end of the radium solution collector is connected to the output end of the filtration device;

[0012] The input end of the injection pump system is connected to the radium solution collector and the rinsing unit, respectively, and the output end of the injection pump system is connected to the input end of the separation column;

[0013] The product collector is connected to the outlet of the separation column via a pipeline.

[0014] Preferably, the injection pump system includes a first injection pump and a second injection pump;

[0015] The input and output terminals of the first injection pump are respectively connected to the input terminals of the radium solution collector and the separation column;

[0016] The input and output ends of the second injection pump are respectively connected to the rinsing unit and the input end of the separation column.

[0017] Preferably, a first multi-way valve is provided on the connecting pipeline between the first injection pump and the radium solution collector;

[0018] A second multi-way valve is provided on the connecting pipeline between the second injection pump and the rinsing unit.

[0019] Preferably, the temperature control range of the ultrasonic vibration heating unit is 50℃~100℃, the vibration mode is intermittent, and the intermittent period is 1min~5min.

[0020] Preferably, the ultrasonic vibration heating unit includes a temperature control sensor, an ultrasonic vibrator, a heater, and a controller;

[0021] The temperature control sensor and the ultrasonic vibrator are placed inside the dissolving container;

[0022] The heater is positioned at the bottom of the dissolving container;

[0023] The temperature sensor, ultrasonic vibrator, and heater are respectively connected to the controller.

[0024] Preferably, the separation column is provided with upper and lower sieve plates;

[0025] The upper and lower sieve plates are filled with DGA resin and lead resin, respectively.

[0026] Preferably, the feeding unit includes a radium sulfate adding unit, a saturated sodium carbonate adding unit, an ultrapure water adding unit, and a nitric acid solution adding unit;

[0027] The radium sulfate addition unit, saturated sodium carbonate addition unit, ultrapure water addition unit, and nitric acid solution addition unit are respectively connected to the inlet of the dissolving container.

[0028] Preferably, a solenoid valve is provided between the input end of the filtration device and the separation unit, and a waste liquid / reagent diversion unit is provided at the output end of the filtration device;

[0029] The input end of the waste liquid / reagent diversion unit is connected to the filtration device, and the output end of the waste liquid / reagent diversion unit is connected to the waste liquid collector and the product collector, respectively.

[0030] Preferably, the filtration device includes a filtration flask, a negative pressure pump, and a liquid extraction device;

[0031] The input end of the filtration flask is connected to the output end of the separation unit, and the output end of the filtration flask is connected to the waste liquid collector and the product collector respectively.

[0032] The negative pressure pump is connected to the filtration flask, and a check valve is provided between the negative pressure pump and the filtration flask.

[0033] The input end of the liquid extraction device is connected to the filtration flask, and the output end of the liquid extraction device is connected to the waste liquid / reagent diversion unit.

[0034] The beneficial effects of this application are as follows:

[0035] The ultrasonic vibration heating unit integrated into the dissolving container enhances mass transfer through mechanical vibration, while simultaneously increasing the reaction rate through heating. This shortens the conversion reaction time of insoluble radium sulfate and sodium carbonate to 8-12 hours, compared to the traditional 24 hours, thus improving conversion efficiency. Furthermore, the ultrasonic cavitation effect disrupts the liquid film on the radium sulfate surface, accelerating carbonate ion diffusion. Combined with heating, this promotes a shift in the chemical reaction equilibrium towards radium carbonate formation, further increasing the conversion rate. This solves the problem of low conversion efficiency and incomplete conversion in the preparation process based on the metathesis reaction of insoluble radium sulfate and sodium carbonate, which is limited by solid-liquid mass transfer efficiency. Simultaneously, the purification device improves the purity of radium.

[0036] This application achieves solid-liquid separation by combining a separation unit at the outlet of the dissolving container with a filtration device, thereby preventing unreacted radium sulfate or radium carbonate particles from entering the subsequent purification process, reducing raw material loss and lowering the purification load.

[0037] This application utilizes a waste liquid / reagent diversion unit installed at the output end of a vacuum filtration device, which can automatically switch the solution flow direction via a controller: during the washing stage, the washing solution flows to the waste liquid collector; during the radium solution transfer stage, the radium solution flows to the radium solution collector or the product collector.

[0038] This application provides a first multi-way valve and a second multi-way valve between the first injection pump and the radium solution collector, and between the second injection pump and the rinsing unit, respectively, to achieve flexible switching of fluid paths;

[0039] In this application, the radium conversion device (dissolving container, separation unit, filtration equipment) and the radium purification device (separation column, injection pump system, collection unit) adopt an independent modular design and can be quickly connected through pipelines to adapt to different scales of radium preparation needs.

[0040] The separation column in this application uses a multifunctional packing combination, specifically a layered packing of lead resin and DGA resin (the bottom layer of lead resin adsorbs heavy metal impurities, and the top layer of DGA resin selectively adsorbs radium ions). First, lead resin removes interfering ions such as lead and bismuth, and then DGA resin separates radium from other radionuclides (such as thorium and uranium) to improve radium purity. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the radium salt conversion device in the embodiments of this application;

[0042] Figure 2 This is a schematic diagram of the radium purification device in the embodiments of this application;

[0043] Figure 3 This is a schematic diagram of the separation column structure in an embodiment of this application;

[0044] In the diagram: 1. Dissolving container; 2. Ultrasonic vibration heating unit; 3. Liquid addition unit; 4. Separation unit; 5. Valve; 6. Vacuum filtration flask; 7. Negative pressure pump; 8. Waste liquid / reagent diversion unit; 9. Radium solution collector; 10. First syringe pump; 11. Second syringe pump; 12. Separation column; 13. Eluting unit; 14. Product collector; 15. First multi-way valve; 16. Second multi-way valve; 17. Upper resin layer; 18. Lower resin layer. Detailed Implementation

[0045] A radium preparation apparatus includes a radium conversion device and a radium purification device:

[0046] The radium conversion device includes a dissolution container 1, a separation unit, and a filtration device connected in sequence from top to bottom.

[0047] The dissolving container integrates an ultrasonic vibration heating unit, and a feeding unit is provided on the outer side of the top of the dissolving container. The feeding unit includes a radium sulfate adding unit, a saturated sodium carbonate adding unit, an ultrapure water adding unit, and a nitric acid solution adding unit. The radium sulfate adding unit, the saturated sodium carbonate adding unit, the ultrapure water adding unit, and the nitric acid solution adding unit are respectively connected to the outer side of the top of the dissolving container through pipelines. First, insoluble radium sulfate is added to the dissolving container through the radium sulfate adding unit. Then, saturated sodium carbonate solution is added to the dissolving container through the saturated sodium carbonate adding unit. Finally, relying on the ultrasonic vibration heating unit built into the dissolving container, the radium sulfate reacts with the sodium carbonate using intermittent ultrasonic vibration and heating mode to convert the radium sulfate into radium carbonate.

[0048] The dissolving container is equipped with a filtration device at its outlet, which includes a filtration flask, a negative pressure pump, and a liquid extraction device. The negative pressure pump and the liquid extraction device are connected to the filtration flask. A separation unit is provided between the dissolving container's outlet and the filtration flask, with the outlet (bottom) of the dissolving container and the inlet (top) of the filtration flask connected to its two sides, respectively. After the radium sulfate in the dissolving container is fully converted into radium carbonate, the negative pressure pump is activated, causing all the solution in the dissolving container to flow through the separation unit into the filtration flask of the filtration device. The radium carbonate solid in the dissolving container remains in the dissolving container due to the obstruction of the separation unit, thus achieving solid-liquid separation.

[0049] Ultrapure water is added to the dissolving container containing the retained solids via the ultrapure water addition unit, and the ultrasonic vibration function of the dissolving container is activated. Then, negative pressure pump 7 is started, and solid-liquid separation is performed again via the separation unit. This process is repeated until the remaining sodium carbonate and sulfate ions released from radium sulfate in the dissolving container are washed away. Negative pressure pump 7 (specifically, a negative pressure pump) is then activated to allow all the solution in the dissolving container to flow into the filtration flask, and then negative pressure pump 7 is turned off. The solution in the filtration flask is then drawn into the radium purification device (specifically, a radium solution collector) using a liquid extraction device, and the extraction device is turned off after the extraction is complete.

[0050] Nitric acid solution is added to the dissolving container through the nitric acid solution addition unit. The ultrasonic vibration function of the dissolving container is activated, and the nitric acid solution dissolves and converts the radium carbonate solid remaining in the dissolving container to obtain a radium solution. The negative pressure pump 7 is activated to allow all the solution in the dissolving container to flow into the filtration flask, and then the negative pressure pump 7 is turned off. This process is repeated several times until the radium carbonate solid in the dissolving container is completely converted into a radium solution. Finally, the solution in the filtration flask is pumped into the radium purification device (specifically, the radium solution collector) using a pumping device, and then the pumping device is turned off. Alternatively, 10-20 mL of 3-6 mol / L nitric acid solution is injected through the nitric acid addition unit, and ultrasonic vibration is activated for 1-5 minutes to dissolve the radium carbonate into a radium nitrate solution. Then, the negative pressure filtration device is activated for filtration, and the radium solution is transferred to the radium solution collector using a pumping device. This process is repeated until the solid is completely dissolved.

[0051] The radium purification apparatus includes a radium solution collector, a syringe pump system, a separation column, a rinsing unit, and a product collector;

[0052] The input end of the radium solution collector is connected to the output end of the filtration device (specifically, the waste liquid / reagent diversion unit 8);

[0053] The input terminals of the injection pump system are connected to the radium solution collector 9 and the rinsing unit 13, respectively, and the output terminal of the injection pump system is connected to the input terminal of the separation column 12. The injection pump system includes a first injection pump 10 and a second injection pump 11; the input and output terminals of the first injection pump 10 are connected to the input terminals of the radium solution collector 9 and the separation column 12, respectively; the input and output terminals of the second injection pump 11 are connected to the input terminals of the rinsing unit 13 and the separation column 12, respectively, and the product collector 14 is connected to the outlet of the separation column 12 via a pipeline.

[0054] The specific working process of the radium purification device is as follows:

[0055] The separation column is packed with an upper layer of resin (DGA resin) and a lower layer of resin (lead resin) from top to bottom using a wet packing method. The DGA resin is used to selectively adsorb radium, and the lead resin is used to remove impurities. The packing order is DGA resin first, followed by lead resin.

[0056] During the injection stage, the first injection pump 10 first converts the radium solution from the conversion device. The first multi-way valve 15 is then switched to the radium solution passage, allowing the radium solution to enter the separation column. The radium and impurities in the radium solution interact with the medium inside the separation column 12, and the radium is selectively retained or separated.

[0057] In the rinsing and elution stage, the second injection pump 11 adds the eluent to the separation column 12. The second multi-way valve 16 switches to the rinsing channel as needed to select the appropriate eluent. The eluent first rinses the separation column 12 to remove impurities, and then the elution operation is performed to elute the purified radium from the separation column and flow into the product collector to obtain the radium purified solution.

[0058] It should be noted that:

[0059] In this application, in order to facilitate flexible control of the delivery of liquid from the dissolving container to the filtration flask, a valve 5 is provided between the outlet of the dissolving container and the separation unit. The valve 5 is located on the connecting pipeline between the separation unit 4 and the filtration flask 6.

[0060] A check valve is installed between the negative pressure pump and the filtration flask, and the check valve is installed on the connecting pipeline between the negative pressure pump and the filtration flask.

[0061] To facilitate the collection of waste liquid and product, this application provides a waste liquid / reagent diversion unit 8 at the output end of the suction filtration flask. The input end of the waste liquid / reagent diversion unit 8 is connected to the suction device, and the output end of the waste liquid / reagent diversion unit 8 is connected to both the waste liquid collector and the product collector. The waste liquid / reagent diversion unit 8 includes a three-way solenoid valve and connecting pipes. The input end of the three-way solenoid valve is connected to the output end of the suction device via the connecting pipes, and the output end of the three-way solenoid valve is connected to both the input ends of the waste liquid collector and the product collector via connecting pipes. By switching the three-way solenoid valve of the waste liquid / reagent diversion unit 8, the washing waste liquid is directed to the waste liquid collector, and the radium solution is directed to the product collector.

[0062] In this application, the temperature control range of the ultrasonic vibration heating unit is 50℃~100℃, the vibration mode is intermittent, and the intermittent period can be set to 1min~5min. In specific implementation, the temperature and intermittent period can be adjusted according to the reaction requirements. For example, in the sulfuric acid-radium conversion stage, the temperature is set to 80±1℃, the vibration mode is intermittent, and the intermittent period can be set to 3min to accelerate the reaction and prevent local overheating.

[0063] In this application, the ultrasonic vibration heating unit (e.g., JLT-2850, vibration frequency 28Hz, power 500W) includes a temperature control sensor, an ultrasonic vibrator, a heater, and a controller;

[0064] The temperature control sensor and the ultrasonic vibrator are placed inside the dissolving container;

[0065] The heater is positioned at the bottom of the dissolving container;

[0066] The temperature sensor, ultrasonic vibrator, and heater are respectively connected to the controller.

[0067] In this application, the separation column is provided with upper and lower sieve plates;

[0068] The separation column contains two layers of sieve plates. The upper layer is filled with 5-10 mL of DGA resin for selective adsorption of radium ions; the lower layer is filled with 1-2 mL of lead resin for removing sulfate impurities. During loading, the DGA resin and lead resin are sequentially loaded using a wet process, and a sieve plate is placed between the two layers to ensure stable media stratification. In the radium purification step, the DGA resin in the separation column adsorbs radium ions, the lead resin adsorbs sulfate impurities, and the eluent selectively elutes away radium.

[0069] During radium purification, the first multi-port valve is switched to the radium solution path, and the first syringe pump is started to inject the radium solution into the separation column. In the elution stage, the second multi-port valve is switched to the eluent path, and the second syringe pump is started to inject 0.5 mol / L to 3.0 mol / L HNO3 solution. Impurities are eluted through the separation column and the purified radium solution is collected.

[0070] The waste liquid / reagent diversion unit 8 set at the output end of the filtration equipment switches the path through a three-way solenoid valve: during the washing stage, the waste liquid containing impurities is introduced into the waste liquid collector; during the radium solution collection stage, it switches to the product collector to ensure the separation of waste liquid and product liquid.

[0071] The separation unit is a filter membrane used to retain solid particles.

[0072] The feeding unit includes a radium sulfate adding unit, a saturated sodium carbonate adding unit, an ultrapure water adding unit, and a nitric acid solution adding unit. These units are respectively equipped with containers for radium sulfate, saturated sodium carbonate, ultrapure water, and nitric acid solution, which are connected to a dissolving container. The radium sulfate, saturated sodium carbonate, ultrapure water, and nitric acid solution can be added manually to the dissolving container.

[0073] The radium preparation apparatus described in this application can be configured with a PLC controller to achieve automated process control. The controllers of the solenoid valve, check valve, liquid pump, negative pressure pump, first injection pump, second injection pump, and ultrasonic vibration heating unit are respectively connected to the PLC controller. The temperature and vibration period of the ultrasonic vibration heating unit, the flow rate and volume of the first injection pump and the second injection pump can all be preset by the PLC controller, so as to achieve standardization and repeatability of the preparation process, making it suitable for industrial production or laboratory batch preparation.

[0074] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0075] Example

[0076] Please see Figure 1-3 This invention provides a radium preparation apparatus.

[0077] like Figure 1 As shown, during the radium sulfate conversion stage:

[0078] 1g~1.5g of insoluble radium sulfate is placed in dissolving container 1 through the radium sulfate addition unit in liquid addition unit 3, and 40mL~100mL of saturated sodium carbonate solution is added to dissolving container 1 through the saturated sodium carbonate addition unit in liquid addition unit 3. The ultrasonic vibration heating unit 2 (in this embodiment, the ultrasonic vibration heating unit is JLT-2850, vibration frequency 28Hz, power 500W) is started to maintain the solution temperature at 80±1℃, with an intermittent vibration period of 3min and a time of 8h~12h, using intermittent vibration mode to convert radium sulfate into radium carbonate. After the reaction is completed, valve 5 (in this embodiment, a solenoid valve is used) is opened, and negative pressure pump 7 is started. The separated solution enters the suction flask 6 through separation unit 4, and the radium carbonate solid remains in dissolving container 1; then valve 5 and negative pressure pump 7 are closed.

[0079] Add 10mL~20mL of ultrapure water to the dissolving container 1 through the ultrapure water addition unit in the liquid addition unit 3. Start the ultrasonic vibration heating unit 2 and vibrate it for 1min~2min. Then turn off the ultrasonic vibration heating unit 2, open the valve 5 below the dissolving container 1, and start the negative pressure pump 7 to allow all the solution in the dissolving container 1 to flow into the suction filtration flask 6. Then turn off the negative pressure pump 7. Use the liquid extraction device (i.e., the liquid extraction pump) to extract the solution in the suction filtration flask 6 into the waste liquid bottle. After extraction, turn off the liquid extraction device and valve 5.

[0080] Add 10mL~20mL of ultrapure water to the dissolving container 1 again through the ultrapure water addition unit in the liquid addition unit 3. Start the ultrasonic vibration heating unit 2 and vibrate it for 1min~2min. Then turn off the ultrasonic vibration heating unit 2, open the valve 5 below the dissolving container 1, and start the negative pressure pump 7 to allow all the solution in the dissolving container 1 to flow into the suction flask 6. Then turn off the negative pressure pump 7. Use the liquid extraction device to extract the solution in the suction flask 6 into the waste liquid bottle. After extraction, turn off the liquid extraction device and valve 5.

[0081] Add 10mL~20mL of ultrapure water to the dissolving container 1 again through the ultrapure water addition unit in the liquid addition unit 3. Start the ultrasonic vibration heating unit 2 and vibrate it for 1min~2min. Then turn off the ultrasonic vibration heating unit 2, open the valve 5 below the dissolving container 1, and start the negative pressure pump 7 to allow all the solution in the dissolving container 1 to flow into the suction flask 6. Then turn off the negative pressure pump 7. Use the liquid extraction device to extract the solution in the suction flask 6 into the waste liquid bottle. After extraction, turn off the liquid extraction device and valve 5.

[0082] Add 10-20 mL of 3-6 mol / L HNO3 solution to dissolving container 1 through the nitric acid solution addition unit in the addition unit 3. Start the ultrasonic vibration device for 1-2 minutes, then turn off the ultrasonic vibration heating unit 2, open the valve below the dissolving container, and start the negative pressure pump 7 to allow all the solution in dissolving container 1 to flow into the suction flask 6. Then turn off the negative pressure pump 7. Use the suction device to draw the solution in the suction flask 6 to the radium solution collector 9. After the suction is complete, turn off the suction device and the valve.

[0083] Add 10 mL to 20 mL of 3 mol / L to 6 mol / L HNO3 solution to dissolving container 1 again via the nitric acid solution addition unit in addition unit 3. Start the ultrasonic vibration heating unit 2 and vibrate it for 1 to 2 minutes. Then turn off the ultrasonic vibration heating unit 2, open valve 5 below the dissolving container, and start the negative pressure pump 7 to allow all the solution in dissolving container 1 to flow into the suction flask 6. Then turn off the negative pressure pump 7. Use the suction device to draw the solution in the suction flask 6 into the No. 1 radium solution reagent bottle. After the suction is complete, turn off the suction device and valve 5.

[0084] Add 10-20 mL of 3-6 mol / L HNO3 solution to dissolving container 1 again via the nitric acid solution addition unit in addition unit 3. Start ultrasonic vibration heating unit 2 and vibrate it for 1-2 minutes. Then turn off ultrasonic vibration heating unit 2, open valve 5 below dissolving container 1, and start negative pressure pump 7 to allow all the solution in dissolving container 1 to flow into suction flask 6. Then turn off negative pressure pump 7. Use a liquid extraction device to extract the solution in suction flask 6 into radium solution collector 9. After extraction, turn off the liquid extraction device and valve 5.

[0085] Radium purification stage:

[0086] like Figure 3 As shown, a separation column 12 is packed using a wet packing method. First, the upper layer resin (DGA resin) 17 is packed with a volume of 5 mL to 10 mL, followed by a sieve plate. Then, the lower layer resin (lead resin) 18 is packed with a volume of 1 mL to 2 mL, and another sieve plate is placed. 25 mL to 50 mL of a 0.5 mol / L to 3.0 mol / L HNO3 solution is passed through the packed separation column 12, and the effluent is discarded.

[0087] The pre-equilibrated separation column 12 and radium solution collector 9 were then... Figure 2 connect:

[0088] During sample injection, switch the first multi-port valve 15 to the radium solution path and start the first syringe pump 10 to inject the radium solution from the radium solution collector 9 into the separation column 12. During the elution stage, switch the second multi-port valve 16 to the eluent path and start the second syringe pump 11 to inject 0.5 mol / L to 3.0 mol / L HNO3 solution. After eluting impurities, collect the purified solution into the product collector 14.

[0089] The first syringe pump 10 injects 30 mL to 60 mL of radium solution from the radium solution collector 9 after conversion and dissolution into the separation column 12, and the effluent flows into the product collector 14.

[0090] Add 10 mL to 20 mL of 0.5 mol / L to 3.0 mol / L HNO3 solution to radium solution collector 9. Use the first syringe pump 10 to inject all the washing solution in radium solution collector 9 after conversion and dissolution into separation column 12. The effluent flows into product collector 14.

[0091] Using the second syringe pump 11, inject 10 mL to 20 mL of 0.5 mol / L to 3.0 mol / L HNO3 solution into the separation column 12. The effluent flows into the product collector 14, thus obtaining the radium purified solution.

Claims

1. A radium preparation apparatus, characterized in that, Includes radium conversion equipment and radium purification equipment: The radium conversion device includes a dissolution container and a filtration device; The dissolving container is equipped with an ultrasonic vibration heating unit, a feeding unit is provided outside the dissolving container, and a separation unit is provided at the outlet of the dissolving container. The feeding unit is connected to the dissolving container; The input end of the separation unit is connected to the outlet of the dissolving container, and the output end of the separation unit is equipped with a filtration device. The input and output ends of the filtration device are respectively connected to the separation unit and the radium purification device.

2. The radium preparation apparatus according to claim 1, characterized in that, The radium purification apparatus includes a radium solution collector, an injection pump system, a separation column, an elution unit, and a product collector; The input end of the radium solution collector is connected to the output end of the filtration device; The input end of the injection pump system is connected to the radium solution collector and the rinsing unit, respectively, and the output end of the injection pump system is connected to the input end of the separation column. The product collector is connected to the outlet of the separation column via a pipeline.

3. The radium preparation apparatus according to claim 2, characterized in that, The injection pump system includes a first injection pump and a second injection pump; The input and output terminals of the first injection pump are respectively connected to the input terminals of the radium solution collector and the separation column; The input and output terminals of the second injection pump are respectively connected to the input terminals of the rinsing unit and the separation column.

4. The radium preparation apparatus according to claim 3, characterized in that, A first multi-way valve is provided on the connecting pipeline between the first injection pump and the radium solution collector; A second multi-way valve is provided on the connecting pipeline between the second injection pump and the rinsing unit.

5. The radium preparation apparatus according to claim 1, characterized in that, The temperature control range of the ultrasonic vibration heating unit is 50℃~100℃, the vibration mode is intermittent, and the intermittent period is 1min~5min.

6. The radium preparation apparatus according to claim 1, characterized in that, The ultrasonic vibration heating unit includes a temperature control sensor, an ultrasonic vibrator, a heater, and a controller. The temperature control sensor and the ultrasonic vibrator are placed inside the dissolving container; The heater is positioned at the bottom of the dissolving container; The temperature sensor, ultrasonic vibrator, and heater are respectively connected to the controller.

7. The radium preparation apparatus according to claim 2, characterized in that, The separation column is equipped with two layers of sieve plates, one upper and one lower. The upper and lower sieve plates are filled with DGA resin and lead resin, respectively.

8. The radium preparation apparatus according to claim 2, characterized in that, The feeding unit includes a radium sulfate adding unit, a saturated sodium carbonate adding unit, an ultrapure water adding unit, and a nitric acid solution adding unit; The radium sulfate addition unit, saturated sodium carbonate addition unit, ultrapure water addition unit, and nitric acid solution addition unit are respectively connected to the inlet of the dissolving container.

9. The radium preparation apparatus according to claim 2, characterized in that, A solenoid valve is provided between the input end of the filtration device and the separation unit, and a waste liquid / reagent diversion unit is provided at the output end of the filtration device. The input end of the waste liquid / reagent diversion unit is connected to the filtration device, and the output end of the waste liquid / reagent diversion unit is connected to the waste liquid collector and the product collector, respectively.

10. A radium preparation apparatus according to claim 9, characterized in that, The filtration equipment includes a filtration flask, a negative pressure pump, and a liquid extraction device; The input end of the filtration flask is connected to the output end of the separation unit, and the output end of the filtration flask is connected to the waste liquid collector and the product collector respectively. The negative pressure pump is connected to the filtration flask, and a check valve is provided between the negative pressure pump and the filtration flask; The input end of the liquid extraction device is connected to the filtration flask, and the output end of the liquid extraction device is connected to the waste liquid / reagent diversion unit.

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