A radioactive solution solid-liquid separation sampling device

Abstract

The present application relates to a kind of radioactive solution solid-liquid separation sampling device, including outer frame, in outer frame setting upper fixed plate and lower fixed plate, upper fixed plate is used to fix collection tube, lower fixed plate is used to fix stock solution pipe, between upper fixed plate and lower fixed plate setting filter fixed plate, filter fixed plate is used to fix several filters, filter upper end connects liquid guide tube, lower end connects suction needle, suction needle can move downwards with filter fixed plate to extend into stock solution pipe to carry out sampling, in the upper side of collection tube installation groove setting sealing cover fixed plate, sealing cover fixed plate is used to fix the sealing cover of collection tube, sealing cover has two outlets, one of which is connected with liquid guide tube, the other is connected with vacuum conduit, vacuum conduit one side is provided with vacuum pump interface, vacuum pump interface extends out of outer frame, to connect vacuum pump outside.Using the device disclosed in the present application, automatic solution solid-liquid separation is realized, sampling efficiency is improved, and experimental safety is ensured.

Description

Technical Field

[0001] This invention belongs to the field of radioactive liquid separation and sampling, and specifically relates to a radioactive solution solid-liquid separation and sampling device. Background Technology

[0002] Adsorption separation is an important method for treating radionuclides in high-level radioactive waste liquids. A suitable adsorbent is selected to conduct adsorption experiments on high-level radioactive waste liquids, and samples are taken for analysis. The performance of the adsorbent and its ability to treat high-level radioactive waste liquids are evaluated based on the sample analysis results.

[0003] The current method for preparing samples in high-level radioactive waste liquid adsorption experiments is as follows: Centrifuge tubes for the adsorption experiment are placed in a centrifuge and centrifuged. After a certain time, the centrifuge tubes are removed, and the supernatant is collected for adsorption result analysis. This method is acceptable for adsorbent materials with high density, but it is clearly unsuitable for adsorbent materials with a density similar to the solution, which remain suspended in the solution after centrifugation.

[0004] For adsorbent materials suspended in solution, when preparing samples, the solution in the centrifuge tube is drawn into a syringe, and then a filter is installed on the syringe to filter out impurities in the solution, thereby obtaining a clean sample.

[0005] Because high-level radioactive waste liquids are highly radioactive, adsorption experiments must be conducted in a fume hood or glove box in a radioactive laboratory.

[0006] The following problems exist in this process: First, the radioactive adsorption experiment is carried out in a glove box, which brings great inconvenience to the experimental operation. Second, during the solution filtration process, when pushing the syringe, it is necessary to control the pushing force. Sometimes, it is difficult to push the syringe or push it very hard. During the operation, it is very likely that the syringe will break due to excessive force, resulting in the dangerous situation of radioactive liquid splashing everywhere. Summary of the Invention

[0007] In view of the deficiencies in the existing technology, the purpose of this invention is to provide a radioactive solution solid-liquid separation sampling device that can automatically perform solid-liquid separation of the solution, improve sampling efficiency, and ensure experimental safety.

[0008] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a radioactive solution solid-liquid separation sampling device, the device comprising an outer frame, an upper fixing plate and a lower fixing plate disposed within the outer frame, a collection tube mounting groove disposed on the upper fixing plate to fix the collection tube, and a raw liquid tube mounting groove disposed on the lower fixing plate to fix the raw liquid tube, a filter fixing plate disposed between the upper fixing plate and the lower fixing plate, the filter fixing plate being used to fix a plurality of filters, the positions of the filters corresponding to the positions of the raw liquid tube mounting grooves, the upper end of the filter being connected to a liquid guide tube and the lower end being connected to an aspiration needle, the aspiration needle being able to move downward with the filter fixing plate to extend into the raw liquid tube for sampling, the liquid guide tube being fixed to a collection tube sealing cap, a sealing cap fixing plate disposed on the upper side of the collection tube mounting groove, the sealing cap fixing plate being used to fix the sealing cap of the collection tube, the sealing cap having two outlets, one being a liquid inlet connected to the liquid guide tube and the other being a vacuum outlet connected to a vacuum conduit, a vacuum pump interface disposed on one side of the vacuum conduit, the vacuum pump interface extending outward from the outer frame for connecting an external vacuum pump.

[0009] Furthermore, the filter includes a replaceable filter membrane.

[0010] Furthermore, several magnetic stirrers are provided at the bottom of the outer frame, and the number and position of the magnetic stirrers are matched with the raw liquid pipe mounting groove on the lower fixed plate.

[0011] Furthermore, a gate is provided between the vacuum conduit and the vacuum pump interface.

[0012] Furthermore, the number and position of the collection tube mounting slots are matched with the original liquid tube mounting slots.

[0013] Furthermore, the sealing cover fixing plate is adjustable in height.

[0014] Furthermore, the filter mounting plate is adjustable in height.

[0015] Furthermore, a sealing cap for securing the collection tube is pre-installed on the sealing cap fixing plate.

[0016] Furthermore, before the reaction of the unfiltered original liquid in the original liquid tube is completed, the height of the suction needle is above the surface of the unfiltered original liquid in the original liquid tube.

[0017] Furthermore, after the reaction of the unfiltered raw liquid in the raw liquid tube is completed, the filter fixing plate descends, and the suction needle descends accordingly until it extends below the surface of the unfiltered raw liquid in the raw liquid tube.

[0018] The advantages of this invention are as follows: By employing the radioactive solution solid-liquid separation sampling device disclosed herein, multiple raw liquid tube fixing slots can be installed on the lower fixing plate, enabling simultaneous processing of multiple samples and improving feeding efficiency. By connecting a vacuum pump to the sealed outlet, the process of filtering, collecting, and adsorbing experimental samples is automatically completed using vacuum (negative pressure), ensuring the uniformity of sampling speed and force, making the filtration process safer, and improving the safety of radioactive experiments. Attached Figure Description

[0019] Figure 1 This is a structural block diagram of a radioactive solution solid-liquid separation sampling device according to an embodiment of the present invention;

[0020] The components are: 1-outer frame, 2-magnetic stirrer, 3-stock solution tube, 4-lower fixing plate, 5-suction needle, 6-filter fixing plate, 7-filter, 8-liquid guide tube, 9-upper fixing plate, 10-collection tube, 11-sealing cap fixing plate, 12-vacuum conduit, 13-vacuum pump interface, 14-gate, 15-sealing cap, 16-filtered liquid, 17-stock solution before filtration. Detailed Implementation

[0021] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0022] Example 1

[0023] like Figure 1 As shown, this embodiment of the invention provides a radioactive solution solid-liquid separation sampling device, including an outer frame 1, which is fixedly connected to a lower fixing plate 4, a filter fixing plate 6, an upper fixing plate 9, and a sealing cover fixing plate 11.

[0024] A raw material tube mounting groove is provided on the lower fixing plate 4 to fix the raw material tube 3. Several magnetic stirrers 2 are provided at the bottom of the outer frame 1, and the number and position of the magnetic stirrers 2 are matched with the raw material tube mounting groove on the lower fixing plate 4.

[0025] The upper fixing plate 9 is provided with a collection pipe mounting groove to fix the collection pipe 10.

[0026] The raw liquid tube 3 is used to hold the raw liquid 17 before filtration, and the collection tube 10 is used to hold the liquid 16 after filtration.

[0027] A filter fixing plate 6 is provided between the upper fixing plate 9 and the lower fixing plate 4. The filter fixing plate 6 is adjustable in height and is used to fix a filter 7. The filter 7 contains a filter membrane, which is replaceable. The upper end of the filter 7 is connected to a liquid guide tube 8, and the lower end is connected to a suction needle 5. The suction needle 5 can move downward with the filter fixing plate 6 to extend into the original liquid tube 3 for sampling.

[0028] The liquid guide tube 8 is connected to the collection tube 10. A sealing cap fixing plate 11 is provided on the upper side of the collection tube 10. The sealing cap fixing plate 11 can be raised and lowered.

[0029] The sealing cover fixing plate 11 is used to fix the sealing cover. The sealing cover has two outlets, one of which is a liquid inlet connected to the liquid guide pipe 8, and the other is an air extraction port connected to the vacuum guide pipe 12.

[0030] A vacuum pump interface 13 is provided on one side of the vacuum conduit 12. The vacuum pump interface 13 extends outward into the outer frame 1 for connecting an external vacuum pump to evacuate the vacuum. A gate 14 is provided between the vacuum conduit 12 and the vacuum pump interface 13.

[0031] The sample preparation process using the radioactive solution solid-liquid separation sampling device disclosed in this embodiment of the invention is as follows:

[0032] Place the raw liquid tubes 3 sequentially into the raw liquid tube mounting slots on the lower fixing plate 4 and secure them. Then connect the suction needle 5 to the filter 7 and place them sequentially on the liftable filter fixing plate 6. Next, fix the collection tubes 10 sequentially to the upper fixing plate 9. Move the sealing cap fixing plate 11 downwards so that the pre-installed double-control sealing cap 15 covers the collection tube 10 tightly. Lock the sealing cap fixing plate 11 so that it cannot move up or down. Connect the filter 7 and the air inlet of the double-control sealing cap of the collection tube with the liquid guide tube 8. Note that the liquid guide tube should be long enough for the next step.

[0033] Turn on the magnetic stirrer 2. After the reaction in the stock solution tube 3 is completed, the filter fixing plate 6 is lowered so that the aspiration needle 5 is inserted into the stock solution tube at an appropriate position below the surface of the stock solution before filtration and the filter fixing plate 6 is locked. Then turn on the vacuum pump connected to the vacuum pump interface 13 and start filtration of the stock solution before filtration. The stock solution before filtration after adsorption experiment enters the sample collection tube 10. After extracting the specified amount of sample, turn off the vacuum pump to complete the process of adsorption experiment filtration collection and sample preparation.

[0034] As can be seen from the above embodiments, the radioactive solution solid-liquid separation sampling device disclosed in this invention includes an outer frame, an upper fixing plate and a lower fixing plate arranged within the outer frame. The upper fixing plate is used to fix the collection tube, and the lower fixing plate is used to fix the raw solution tube. A filter fixing plate is arranged between the upper and lower fixing plates to fix several filters. The upper end of each filter is connected to a liquid guide tube, and the lower end is connected to an aspiration needle. The aspiration needle can move downward with the filter fixing plate to extend into the raw solution tube for sampling. A sealing cap fixing plate is arranged on the upper side of the collection tube mounting groove to fix the sealing cap of the collection tube. The sealing cap has two outlets, one connected to the liquid guide tube and the other connected to a vacuum conduit. A vacuum pump interface is arranged on one side of the vacuum conduit, and the vacuum pump interface extends outward from the outer frame to connect to an external vacuum pump. Using the device disclosed in this invention, automatic solid-liquid separation of the solution can be achieved, improving sampling efficiency and ensuring experimental safety.

[0035] The device described in this invention is not limited to the embodiments described in the specific implementation. Other implementation methods derived by those skilled in the art based on the technical solution of this invention also fall within the scope of technical innovation of this invention.

Claims

1. A radioactive solution solid-liquid separation sampling device, characterized in that: The device includes an outer frame, within which are an upper fixing plate and a lower fixing plate. The upper fixing plate has a collection tube mounting slot to fix the collection tube, and the lower fixing plate has a raw liquid tube mounting slot to fix the raw liquid tube. A filter fixing plate is positioned between the upper and lower fixing plates, fixing several filters. The filters are positioned corresponding to the raw liquid tube mounting slots. Each filter has a guide tube connected to its upper end and a suction needle connected to its lower end, enabling automatic solid-liquid separation of the solution. Suspended adsorbent material exists in the solution. The guide tube is fixed to a sealing cap on the collection tube. A sealing cap fixing plate is positioned above the collection tube mounting slot, fixing the sealing cap of the collection tube. The sealing cap has two outlets, one of which is an inlet connected to the guide tube. One tube is a vacuum tube, and the other is a vacuum port connected to a vacuum conduit. A vacuum pump interface is provided on one side of the vacuum conduit. The vacuum pump interface extends outward from the outer frame to connect to an external vacuum pump. The sealing cover fixing plate is adjustable. After the collection tube is fixed to the upper fixing plate in sequence, the sealing cover fixing plate is moved down so that the pre-installed double-control sealing cover on it tightly covers the collection tube. Several magnetic stirrers are set at the bottom of the outer frame to stir the solution in the stock solution tube. Before the reaction of the unfiltered stock solution in the stock solution tube is completed, the height of the aspiration needle is higher than the surface of the unfiltered stock solution in the stock solution tube. After the reaction in the stock solution tube is completed, the filter fixing plate is lowered, and the aspiration needle is lowered accordingly until it extends below the surface of the unfiltered stock solution in the stock solution tube. The aspiration needle moves downward with the filter fixing plate to extend into the stock solution tube for sampling.

2. The radioactive solution solid-liquid separation sampling device as described in claim 1, characterized in that: The filter includes a replaceable filter membrane.

3. The radioactive solution solid-liquid separation sampling device as described in claim 2, characterized in that: The number and position of the magnetic stirrers are matched with the raw liquid pipe mounting slot on the lower fixed plate.

4. The radioactive solution solid-liquid separation sampling device as described in claim 3, characterized in that: A gate is provided between the vacuum conduit and the vacuum pump interface.

5. The radioactive solution solid-liquid separation sampling device as described in claim 4, characterized in that: The number and position of the collection tube installation slots are matched with the original liquid tube installation slots.

6. The radioactive solution solid-liquid separation sampling device as described in claim 5, characterized in that: The filter mounting plate is adjustable in height.

7. The radioactive solution solid-liquid separation sampling device as described in claim 6, characterized in that: A sealing cap for securing the collection tube is pre-installed on the sealing cap fixing plate.

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