A post-treatment analysis laboratory heavy metal recovery device

Abstract

The application discloses a heavy metal recovery device for post-treatment analysis laboratories, belongs to the technical field of radiochemical laboratory analysis, and comprises a box component, a first treatment device and a second treatment device. The recovery device is composed of the box component, the first treatment device, the second treatment device and an auxiliary assembly, the position arrangement of various components is realized based on the inner and outer spaces of the box component, the analysis waste liquid containing heavy metals can be changed into heavy metal oxides for recovery, the problems of heavy metal loss and subsequent waste liquid treatment difficulty are solved, and the operation efficiency and operation safety of radiochemical analysis laboratories are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of radiochemical laboratory analysis, and in particular relates to a heavy metal recovery device for a post-processing analysis laboratory. Background Art

[0002] Reprocessing analytical technology is the "eye" of reprocessing. Through process control analysis, product analysis, nuclear material balance, and nuclear criticality safety analysis, it provides key parameters for the safe, stable, and efficient operation of reprocessing plants. Reprocessing analytical laboratories analyze large quantities of liquid samples containing heavy metals such as neptunium and plutonium. The treatment of these analytical wastewaters presents a significant challenge for reprocessing analytical laboratories. Directly discharging these heavy metal-containing analytical wastewaters into the reprocessing plant's wastewater treatment system would not only result in the loss of heavy metals, but would also greatly increase the difficulty of subsequent wastewater treatment. Summary of the Invention

[0003] The object of the present invention is to provide a heavy metal recovery device for a post-processing analysis laboratory to solve the problems in the treatment of analytical wastewater raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solution: a heavy metal recovery device for a post-processing analysis laboratory, comprising:

[0005] A box component, wherein an installation area is defined;

[0006] A first processing device is installed in the installation area and includes:

[0007] at least two collecting tanks, each of the collecting tanks being configured to collect and store one of an organic phase solution and an aqueous phase solution;

[0008] an extraction device configured to receive the organic phase solution outputted from the collection tank and / or the aqueous phase solution with a heavy metal concentration lower than a set value;

[0009] a seasoning tank configured to receive the aqueous solution outputted by the extraction device and / or the collection tank and having a heavy metal concentration higher than a set value, and to perform seasoning treatment on the aqueous solution;

[0010] a purification unit configured to receive the aqueous solution outputted from the seasoning tank and purify the aqueous solution;

[0011] a recovery container configured to receive the aqueous solution output from the purification unit;

[0012] The recovery device also includes:

[0013] a second treatment device, disposed in the installation area, configured to perform denitration treatment on the aqueous solution in the recovery container and output heavy metal oxides;

[0014] The auxiliary component is arranged outside the installation area and includes a plurality of reagent tanks, each of which is configured to supply required reagents to at least one of the extraction device, the seasoning tank and the purification unit.

[0015] Preferably, the recovery device further comprises at least one plate component, and the first processing device and the second processing device are assembled on the same or different plate components.

[0016] Preferably, the at least two collection tanks include a first tank and a second tank, the first tank is configured to collect and store an organic phase solution, the second tank is configured to collect and store an aqueous phase solution, the first tank is fluidically connected to the extraction device via a pipeline, and the second tank has a first output end fluidically connected to the extraction device and a second output end fluidically connected to the seasoning tank.

[0017] Preferably, a three-way valve is installed on the output pipe of the second tank body, and the first output end and the second output end both constitute interfaces of the three-way valve.

[0018] Preferably, at least part of the reagent tank is fluidically connected to at least two of the extraction device, the seasoning tank and the purification unit via a pipeline.

[0019] Preferably, at least part of the output pipes of the reagent tanks are provided with multi-way valves, and the reagent tanks are connected to the extraction device, the seasoning tank and multiple devices in the purification unit based on the multi-way valves.

[0020] Preferably, the seasoning tank is fluidically connected to the extraction device and the purification unit through a pipeline, and a multi-way valve is provided on at least one input pipeline of the extraction device, the seasoning tank and the purification unit.

[0021] Preferably, the recovery device further comprises:

[0022] a first intermediate tank body, the first intermediate tank body being fluidically connected to the extraction device and the seasoning tank body, wherein the aqueous solution output after being processed by the extraction device is stored in the first intermediate tank body and supplied to the seasoning tank body for seasoning operation as needed;

[0023] The second intermediate tank is fluidically connected to the conditioning tank and the purification unit. The aqueous solution output from the conditioning tank is stored in the second intermediate tank and supplied to the ion column as needed for purification.

[0024] Preferably, the flow of the aqueous solution and / or organic solution between the collecting tank, the extraction device, the seasoning tank and the purification unit is driven by a pump.

[0025] Preferably, the second treatment device is configured as a microwave denitration device, and comprises:

[0026] a microwave box defining a processing area for accommodating the recovery container;

[0027] a rotating platform configured to support the recovery container;

[0028] a lifting structure configured to drive the rotating platform to move up and down so that the rotating platform enters or leaves the processing area;

[0029] An exhaust gas treatment device connected to the exhaust system in the box component;

[0030] The compressed air ejector is fluidically connected to the microwave box and the tail gas treatment device. The exhaust gas generated in the treatment area flows into the tail gas treatment device under the action of the compressed air ejector and is discharged through the exhaust system.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] The present application constructs a recovery device consisting of a box body, a first processing device, a second processing device and auxiliary components, and realizes the position arrangement of each component based on the internal and external space of the box body. It can convert analytical waste liquid containing heavy metals into heavy metal oxides for recycling, solves the problem of heavy metal loss and subsequent waste liquid treatment difficulties, and improves the operating efficiency and safety of the radiochemical analysis laboratory. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the overall structure of the recovery device;

[0034] Figure 2 This is a structural diagram of the second processing device.

[0035] In the figure: 1. First tank body; 2. Second tank body; 3. Extraction device; 4. First intermediate tank body; 5. Seasoning tank body; 6. Second intermediate tank body; 7. Purification unit; 8. Box body component; 9. Extraction reagent tank; 10. Stripping reagent tank; 11. Acid reagent tank; 12. Oxidation reagent tank; 13. Reduction reagent tank; 14. Washing reagent tank; 15. Elution reagent tank; 32. Microwave denitrification device; 33. Compressed air ejector; 34. Tail gas treatment device; 35. Water cooling device; 36. Recovery container; 41. Exhaust pipe; 42. Microwave inlet; 43. Microwave box body; 45. Rotating platform; 46. Rotation drive structure; 47. Lifting structure. DETAILED DESCRIPTION

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0037] A post-processing analysis laboratory heavy metal recovery device (hereinafter referred to as the recovery device), referring to Figure 1 The main body is composed of a box part 8, a processing component and an auxiliary component, wherein an installation area is defined in the box part 8, the processing component is assembled in the installation area, and correspondingly, the auxiliary component is arranged outside the installation area and is configured to supply various reagents required in the treatment process to the processing component. In some embodiments, the recovery device further includes at least one plate part (not shown in the figure), which is made of materials such as stainless steel and serves as an assembly carrier for the processing component. Different units constituting the processing component are assembled on the same or different plate parts and placed in the installation area in the box part 8 to achieve the installation of the processing component, and the processing component can be disassembled and assembled by disassembling the plate parts. In some embodiments, the box part 8 is configured to be closable and allows staff to operate the processing component in the installation area from outside the installation area to simplify the operation of the processing component in the installation area and improve the safety of the operation. For example, the box part 8 is configured as a glove box, and correspondingly, the auxiliary component is assembled on the wall next to the box part 8 to complete the installation of the auxiliary component.

[0038] In some embodiments, reference Figure 1 The above-mentioned processing component includes a first processing device and a second processing device, wherein the first processing device is composed of multiple units, and the analytical waste liquid is sequentially processed by multiple units of the first processing device and then supplied to the second processing device. Correspondingly, the above-mentioned auxiliary component is composed of multiple reagent tanks, and a single reagent tank stores the same or different reagents, and the single reagent tank is fluidically connected to at least one unit in the first processing device, and is configured to supply the required reagents to each unit in the first processing device.

[0039] In some embodiments, reference Figure 1The first processing device includes a collection unit for collecting heavy metal-containing analytical waste liquid (hereinafter referred to as analytical waste liquid) from different positions. The collection unit includes at least two collection tanks for collecting and storing different types of analytical waste liquid, and the collection tank fluid is connected to the waste liquid outlets at different positions. In some embodiments, a single collection tank is provided with a manual feed port and a liquid level detection device (such as a liquid level meter), wherein the manual feed port is constituted as a feed port for the analytical waste liquid (such as an organic phase solution), and the liquid level detection device is used for liquid level detection during the storage and discharge process. In some embodiments, The above-mentioned collection unit includes at least a first tank body 1 and a second tank body 2, wherein the first tank body 1 is configured to receive and store an organic phase solution, and the second tank body 2 is configured to receive and store an aqueous phase solution, that is, the first tank body 1 and the second tank body 2 constitute collection tanks for the organic phase solution and the aqueous phase solution, respectively. In this embodiment, the above-mentioned second tank body 2 has a first output end and a second output end. Exemplarily, a three-way valve 28 is assembled on the output pipe of the second pipe, and the inlet of the three-way valve 28 is connected to the output port of the second tank body 2. The two outlets of the three-way valve constitute the first output end and the second output end of the second tank body 2, respectively.

[0040] Back to Figure 1 Continuing to describe the first processing device, the first processing device further includes an extraction unit, which is fluidically connected to the collection unit and configured to receive the analytical waste liquid output by the collection unit and perform extraction or back-extraction treatment on the analytical waste liquid. In some embodiments, the extraction unit includes an extraction device 3, which is fluidically connected to at least part of the collection tank in the collection unit via a pipeline. In some examples, the extraction device 3 is fluidically connected to the first output end of the fluid of the second tank 2. Furthermore, the connecting pipeline between the extraction device 3 and the collection tank is equipped with pump bodies 16, 17 (for example Peristaltic pump) and a valve body (such as a one-way valve) to drive the analytical waste liquid in the collection tank body to flow to the extraction device, corresponding to the extraction unit in the first treatment device. The above-mentioned auxiliary components include an extraction reagent tank 9 and a stripping reagent tank 10. The extraction reagent tank 9 and the stripping reagent tank 10 are both fluidly connected to the extraction device 3 through pipelines, and are respectively configured to supply extraction reagents and stripping reagents to the extraction device 3. In some examples, the extraction reagent tank 9 and the stripping reagent tank 10 are provided with pump bodies 21, 22 (such as peristaltic pumps) and valve bodies on the connecting pipelines with the extraction device 3 to control the addition of extraction reagents and stripping reagents.

[0041] In some embodiments, the extraction device 3 is further equipped with a stirring device for stirring the analytical waste liquid and the extraction or stripping reagent during the extraction process to ensure sufficient contact between the analytical waste liquid and the extraction or stripping reagent.

[0042] Back to Figure 1Continuing to describe the first treatment device, the above-mentioned first treatment device also includes a conditioning unit, which includes a fluid connected to the extraction device 3 and at least a portion of the collection tank, and is configured to receive an aqueous solution with a plutonium concentration higher than a set value and perform conditioning treatment on the aqueous solution. In some examples, the above-mentioned conditioning tank 5 is connected to the second output end of the second tank 2. When the concentration of heavy metals (such as plutonium, hereinafter uniformly referred to as plutonium) in the aqueous solution stored in the second tank 2 is higher than the set value, the aqueous solution can be directly supplied to the conditioning tank 5 through the second output end. , corresponding to the seasoning unit, the above-mentioned auxiliary component has an acid reagent tank 11, an oxidizing reagent tank 12 and a reducing reagent tank 13. The acid reagent tank 11, the oxidizing reagent tank 12 and the reducing reagent tank 13 are all connected to the seasoning tank body 5 through pipeline fluids, and are configured to supply acid regulating reagent, oxidizing agent and reducing agent into the seasoning tank body 5 respectively. Furthermore, the connecting pipelines between the acid reagent tank 11, the oxidizing reagent tank 12 and the reducing reagent tank 13 and the seasoning tank body 5 are all provided with pump bodies 23, 24, 25 (such as peristaltic pumps) and valve bodies for controlling the addition of acid regulating reagent, oxidizing agent and reducing agent.

[0043] In some embodiments, the seasoning tank 5 is equipped with a heating device and a stirring device, wherein the heating device is used to heat the seasoning tank 5 and maintain it at a set temperature, and the stirring device is used to stir during the seasoning process to ensure sufficient reaction between the aqueous phase solution and the acid adjustment reagent, the oxidant and the reducing agent, and to speed up the operation speed of the recovery device.

[0044] In some embodiments, the above-mentioned first processing device also includes a first intermediate tank body 4, which is configured as a transition tank body between the extraction device 3 and the seasoning tank body 5, that is, the first intermediate tank body 4 is fluidically connected to the above-mentioned extraction device 3 and the seasoning tank body 5, and the analytical waste liquid (that is, the aqueous phase solution) output after treatment by the extraction device 3 is stored in the first intermediate tank body 4 and supplied to the seasoning tank body 5 as needed for seasoning operation.

[0045] In some embodiments, the first treatment device further includes a purification unit 7, which includes a fluid connected to the seasoning tank 5 and configured to receive the aqueous phase solution processed by the seasoning tank 5 and perform separation and purification operations on the aqueous phase solution. In some examples, the purification unit 7 is an ion column, corresponding to the purification unit 7. The auxiliary component further includes a washing reagent tank 14 and an elution reagent tank 15. The washing reagent tank 14 and the elution reagent tank 15 are both connected to the ion column through a pipeline fluid and are configured to supply the required washing reagent and elution reagent to the ion column respectively. In some examples, the connection pipelines between the washing reagent tank 14 and the elution reagent tank 15 and the ion column are provided with pump bodies 26, 27 (for example, peristaltic pumps) and valve bodies for controlling the addition of washing reagents and elution reagents. In some embodiments, the ion column has a waste liquid outlet for discharging waste liquid.

[0046] In some embodiments, the above-mentioned first treatment device also includes a second intermediate tank body 6, which is configured as a transition tank body between the seasoning tank body 5, that is, the second intermediate tank body 6 is fluidly connected to the seasoning tank body 5 and the ion column, and the aqueous phase solution output from the seasoning tank body 5 is stored in the second intermediate tank body 6 and supplied to the ion column as needed for purification operation.

[0047] In some embodiments, the first treatment device further includes a recovery container 36 , which is made of a material such as quartz and is used to collect the aqueous solution processed and output by the ion column.

[0048] In some embodiments, a portion of the reagent tank constituting the auxiliary assembly is fluidically connected to at least two units of the first processing apparatus. In some examples, a multi-way valve is provided on the output pipe of the portion of the reagent tank to allow the reagent in the reagent tank to be supplied to different units of the first processing apparatus. For example, referring to Figure 1 The output pipe of the oxidizing reagent tank 12 is equipped with a three-way valve 30 to allow the reducing reagent to be supplied to the seasoning tank 5 and the extraction device 3.

[0049] In some embodiments, a multi-way valve is installed on the input pipeline of the first processing device part unit to simplify the arrangement of the connecting pipelines of the unit and multiple reagent tanks and other units. For example, referring to Figure 1 The input pipe of the ion column is equipped with a four-way valve 31 for connecting the ion column with the washing reagent tank 14 , the elution reagent tank 15 and the second intermediate tank body 6 .

[0050] Reference Figure 1 and 2, the second processing device is configured to perform denitration treatment on the aqueous solution in the recovery container 36 to obtain plutonium oxide (such as plutonium dioxide). In some embodiments, the second processing device is configured as a microwave denitration device 32, and includes a microwave box 43 and a driving device, wherein the microwave box 43 defines a processing area and has a microwave inlet 42 and an exhaust pipe 41. Correspondingly, the driving device includes a rotating structure and a lifting structure 47. The rotating structure has a rotating platform 45 for placing the recovery container 36 and a rotating driving structure 46 (such as a motor) for driving the rotating platform 45 to rotate. The lifting structure 47 is configured to drive the rotating structure as a whole to lift and lower. The lifting structure 47 may exemplarily include a hydraulic driving component that can realize linear drive. The hydraulic element is moved to enable the rotating structure and the recovery container 36 to enter or leave the processing interval in the box part 8 as a whole. In some embodiments, the second treatment device also includes a compressed air ejector 33 and an exhaust gas treatment device 34, wherein the compressed air ejector fluid is connected to the exhaust pipe 41 of the microwave box 43 and the exhaust gas treatment device 34. During the operation of the second treatment device, the exhaust gas generated in the microwave box 43 is discharged under the action of the compressed air ejector 33, and enters the exhaust gas treatment device 34 for treatment and is then discharged by the exhaust system in the box part 8. Corresponding to the second treatment device, the above-mentioned auxiliary component also includes a water cooling device 35, which is connected to the microwave denitrification device 32 and is configured to cool the microwave denitrification device 32 during its operation.

[0051] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A heavy metal recovery device for post-processing analysis laboratory, characterized in that: include: A box component, wherein an installation area is defined; A first processing device is installed in the installation area and includes: at least two collecting tanks, each of the collecting tanks being configured to collect and store one of an organic phase solution and an aqueous phase solution; an extraction device configured to receive the organic phase solution outputted from the collection tank and / or the aqueous phase solution with a heavy metal concentration lower than a set value; a seasoning tank configured to receive the aqueous solution outputted by the extraction device and / or the collection tank and having a heavy metal concentration higher than a set value, and to perform seasoning treatment on the aqueous solution; a purification unit configured to receive the aqueous solution outputted from the seasoning tank and purify the aqueous solution; a recovery container configured to receive the aqueous solution output from the purification unit; The recovery device also includes: a second treatment device, disposed in the installation area, configured to perform denitration treatment on the aqueous solution in the recovery container and output heavy metal oxides; The auxiliary component is arranged outside the installation area and includes a plurality of reagent tanks, each of which is configured to supply required reagents to at least one of the extraction device, the seasoning tank and the purification unit.

2. A post-processing analysis laboratory heavy metal recovery device according to claim 1, characterized in that: The recycling device further comprises at least one plate component, and the first processing device and the second processing device are assembled on the same or different plate components.

3. A post-processing analysis laboratory heavy metal recovery device according to claim 1 or 2, characterized in that: The at least two collection tanks include a first tank and a second tank, the first tank is configured to collect and store an organic phase solution, the second tank is configured to collect and store an aqueous phase solution, the first tank is fluidically connected to the extraction device via a pipeline, and the second tank has a first output end fluidically connected to the extraction device and a second output end fluidically connected to the seasoning tank.

4. A post-processing analysis laboratory heavy metal recovery device according to claim 3, characterized in that: A three-way valve is installed on the output pipe of the second tank, and the first output end and the second output end both constitute interfaces of the three-way valve.

5. A post-processing analysis laboratory heavy metal recovery device according to claim 1, characterized in that: At least part of the reagent tank is fluidically connected to at least two of the extraction device, the seasoning tank, and the purification unit through a pipeline.

6. A post-processing analysis laboratory heavy metal recovery device according to claim 5, characterized in that: At least part of the output pipelines of the reagent tanks are provided with multi-way valves, and the reagent tanks are connected with the extraction device, the seasoning tank and multiple devices in the purification unit based on the multi-way valves.

7. The heavy metal recovery device for post-processing analysis laboratory according to claim 1, characterized in that: The seasoning tank is fluidically connected to the extraction device and the purification unit through a pipeline, and a multi-way valve is provided on at least one input pipeline of the extraction device, the seasoning tank and the purification unit.

8. The heavy metal recovery device for post-processing analysis laboratory according to claim 1, characterized in that: The recovery device also includes: a first intermediate tank body, the first intermediate tank body being fluidically connected to the extraction device and the seasoning tank body, wherein the aqueous solution output after being processed by the extraction device is stored in the first intermediate tank body and supplied to the seasoning tank body for seasoning operation as needed; The second intermediate tank is fluidically connected to the conditioning tank and the purification unit. The aqueous solution output from the conditioning tank is stored in the second intermediate tank and supplied to the ion column as needed for purification.

9. The heavy metal recovery device for post-processing analysis laboratory according to claim 1, characterized in that: The flow of the aqueous phase solution and / or the organic phase solution between the collecting tank, the extraction device, the seasoning tank and the purification unit is driven by a pump.

10. The heavy metal recovery device for post-processing analysis laboratory according to claim 1, characterized in that: The second treatment device is configured as a microwave denitration device and includes: a microwave box defining a processing area for accommodating the recovery container; a rotating platform configured to support the recovery container; a lifting structure configured to drive the rotating platform to move up and down so that the rotating platform enters or leaves the processing area; An exhaust gas treatment device connected to the exhaust system in the box component; The compressed air ejector is fluidically connected to the microwave box and the tail gas treatment device. The exhaust gas generated in the treatment area flows into the tail gas treatment device under the action of the compressed air ejector and is discharged through the exhaust system.

Images