Alpha nuclide waste liquid rapid adsorption and solidification all-in-one machine

Abstract

An alpha nuclide waste liquid rapid adsorption and solidification all-in-one machine relates to the technical field of radionuclide waste liquid treatment, and comprises a lead tank body, a waste liquid storage tank is arranged above the lead tank body, a liquid outlet is arranged at the bottom of the waste liquid storage tank, the liquid outlet is connected with an MOFs adsorption column through a corrosion-resistant hose, the MOFs adsorption column is connected with a quartz glass cavity through a spiral conveying pipe, and the quartz glass cavity is connected with the lead tank body. A UV-LED array is arranged outside the quartz glass cavity, a high-pressure atomizing nozzle is arranged on the side wall of the quartz glass cavity, and the high-pressure atomizing nozzle is connected with an external resin storage tank; the lower end of the quartz glass cavity is hermetically communicated with the storage box; the waste liquid storage tank, the corrosion-resistant hose, the MOFs adsorption column, the spiral conveying pipe, the quartz glass cavity, the UV-LED array, the high-pressure atomizing nozzle, the PTFE pipeline and the storage box are all embedded in the lead tank body. According to the utility model, nuclide leakage and secondary pollution risks in the distribution treatment process of the waste liquid are avoided. The operation safety is greatly improved; and the treatment period is shortened.

Description

Technical Field

[0001] The utility model relates to the technical field of waste liquid treatment of radionuclides, in particular to a rapid adsorption and solidification integrated machine for alpha nuclide waste liquid. Background Art

[0002] At present, the existing nuclide waste liquid treatment technology relies on manual transportation and step-by-step treatment (such as pretreatment, solidification, and split design of encapsulation), resulting in large equipment volume and cumbersome operation. And because the waste liquid needs to be transported and left standing for more than 10 half-lives of the nuclide before it can be treated, the waste liquid treatment cycle is long and relies on manual transportation, which is easy to cause secondary pollution and difficult to meet the rapid treatment requirements of high-radioactivity waste liquid. In addition, the high corrosivity of high-level radioactive waste liquid causes the reactor materials to be easily damaged, and the leakage of high-level radioactive waste liquid causes secondary pollution. In addition, the traditional split equipment is prone to the escape of α-aerosol during waste liquid transfer and solidified body handling; the conventional ventilation system may also have insufficient interception efficiency for α-aerosol, resulting in the diffusion of alpha particles, which is easy to cause internal irradiation of operators and environmental pollution. In addition, some nuclide waste liquid treatments need to be treated by incineration or steam reforming technology, which is easy to generate radioactive fly ash and requires an additional exhaust gas purification system, increasing the equipment complexity and maintenance cost. Some nuclide treatment processes use the evaporation concentration method to treat waste liquid. However, some alpha nuclides (such as RaCl2) have certain volatility, and this method may cause the radioactive nuclides to volatilize and transfer to cause secondary pollution. Moreover, the distillation method has high power consumption and high cost, and there are also risks of corrosion, foaming, scaling, and explosion. Content of the Utility Model

[0003] Aiming at the deficiencies of the prior art, the utility model provides a rapid adsorption and solidification integrated machine for alpha nuclide waste liquid, which overcomes the deficiencies of the prior art, is reasonably designed, and avoids the risks of nuclide leakage and secondary pollution in the distributed treatment process of waste liquid. And it greatly improves the operation safety and shortens the treatment cycle.

[0004] To achieve the above purposes, the utility model is realized through the following technical solutions:

[0005] A rapid adsorption and solidification integrated machine for alpha nuclide waste liquid includes a lead tank body. A waste liquid storage tank is fixedly embedded above the lead tank body. A liquid injection port is arranged above the waste liquid storage tank. A liquid outlet is arranged at the bottom of the waste liquid storage tank. One end of a corrosion-resistant hose is connected to the liquid outlet. The other end of the corrosion-resistant hose is fixedly connected to the inlet end of a MOFs adsorption column. The outlet end of the MOFs adsorption column is communicated with a quartz glass cavity through a screw conveyor pipe. A plurality of groups of UV-LED arrays are arranged around the outer surface of the quartz glass cavity. A high-pressure atomizing nozzle is fixedly embedded on the side wall of the quartz glass cavity. The high-pressure atomizing nozzle is connected to an external resin storage tank through a PTFE pipe. The lower end of the quartz glass cavity is hermetically communicated with a storage box;

[0006] The waste liquid storage tank, corrosion-resistant hose, MOFs adsorption column, spiral conveyor pipe, quartz glass cavity, UV-LED array, high-pressure atomizing nozzle, PTFE pipe and storage box are all fixedly embedded in the lead tank body.

[0007] Preferably, the liquid injection port includes a pouring funnel and a splash-proof groove. The splash-proof groove is a spherical cavity structure with upper and lower openings. The upper end of the splash-proof groove is connected to the bottom of the pouring funnel, and the lower end of the splash-proof groove is hermetically connected to the top of the waste liquid storage tank; a sealing cover plate is movably installed on the pouring funnel.

[0008] Preferably, a plurality of layers of stainless steel sieves are fixedly installed inside the MOFs adsorption column, and adsorption particles are filled between the stainless steel sieves.

[0009] Preferably, the MOFs adsorption column is arranged at an inclination angle of 30-60 degrees.

[0010] Preferably, a plurality of ultrasonic dispersers are fixedly embedded on the outer surface of the MOFs adsorption column.

[0011] Preferably, the UV-LED array is fixed on the outer surface of the quartz glass cavity by a buckle.

[0012] The utility model provides a rapid adsorption and solidification integrated machine for alpha nuclide waste liquid, which has the following beneficial effects: by fixedly embedding the waste liquid storage tank, MOFs adsorption column, quartz glass cavity, PTFE pipe and storage box in the lead tank body; the whole process of the waste liquid from being injected into the waste liquid storage tank through the liquid injection port to the storage box is carried out in the closed environment of the lead tank body, avoiding the risk of nuclide leakage and secondary pollution during the distribution and treatment process of the waste liquid. And through the shielding effect of the lead tank body itself, the radiation is effectively blocked, effectively avoiding the risk of nuclide leakage. And because the whole process of the waste liquid from being injected through the liquid injection port to being stored in the storage box is automatically and continuously carried out in the lead tank body without manual intervention, the operation safety is greatly improved and the treatment cycle is shortened. The whole process realizes efficient adsorption and solidification through the synergistic effect of the MOFs adsorption column and the UV-LED array, ensuring the complete isolation of nuclides. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the present utility model or the prior art.

[0014] Figure 1 Structural schematic diagram of the present utility model;

[0015] Explanation of the reference numerals in the drawings:

[0016] 1. Lead tank body; 2. Waste liquid storage tank; 3. Liquid injection port; 4. Liquid outlet; 5. Corrosion-resistant hose; 6. MOFs adsorption column; 7. Screw conveyor pipe; 8. Quartz glass cavity; 9. UV-LED array; 10. High-pressure atomizing nozzle; 11. PTFE pipe; 12. Storage box; 13. Stainless steel screen; 14. Adsorption particles; 15. Ultrasonic disperser; 31. Liquid pouring funnel; 32. Splash-proof tank. Detailed implementation manners

[0017] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below in conjunction with the accompanying drawings in the present utility model.

[0018] Example 1, as Figure 1 shown, a rapid adsorption and solidification integrated machine for alpha nuclide waste liquid includes a lead tank body 1. A waste liquid storage tank 2 is fixedly embedded above the lead tank body 1. A liquid injection port 3 is arranged above the waste liquid storage tank 2. A liquid outlet 4 is arranged at the bottom of the waste liquid storage tank 2. One end of a corrosion-resistant hose 5 is connected to the liquid outlet 4, and the other end of the corrosion-resistant hose 5 is fixedly connected to the inlet end of an MOFs adsorption column 6. The outlet end of the MOFs adsorption column 6 is connected to a quartz glass cavity 8 through a screw conveyor pipe 7. A plurality of groups of UV-LED arrays 9 are arranged around the outer surface of the quartz glass cavity 8. A high-pressure atomizing nozzle 10 is fixedly embedded on the side wall of the quartz glass cavity 8. The high-pressure atomizing nozzle 10 is connected to an external resin storage tank through a PTFE pipe 11; the lower end of the quartz glass cavity 8 is hermetically connected to a storage box 12;

[0019] The waste liquid storage tank 2, the corrosion-resistant hose 5, the MOFs adsorption column 6, the screw conveyor pipe 7, the quartz glass cavity 8, the UV-LED array 9, the high-pressure atomizing nozzle 10, the PTFE pipe 11 and the storage box 12 are all fixedly embedded in the lead tank body 1.

[0020] Working principle:

[0021] In use, first push the entire device into the fume hood, connect the power supply, and start the negative pressure system. Then connect the terminal of the UV-LED array 9 to the power supply, and connect the high-pressure atomizing nozzle 10 to the external resin storage tank through the PTFE pipe 11. Subsequently, the operator injects the waste liquid into the waste liquid storage tank 2 through the injection port 3 by a syringe or a peristaltic pump. Under the action of gravity, the waste liquid then flows from the liquid outlet 4 of the waste liquid storage tank 2 along the corrosion-resistant hose 5 into the MOFs adsorption column 6, and the radionuclides in the waste liquid are selectively adsorbed by the adsorption particles in the MOFs adsorption column 6. The saturated MOFs particles after adsorption are then transferred to the quartz glass cavity 8 through the spiral conveyor pipe 7. In the quartz glass cavity 8, an acrylate resin solution containing a photoinitiator is evenly sprayed through the high-pressure atomizing nozzle 10, and at the same time, a photocuring reaction is carried out through the UV irradiation of the UV-LED array 9, thereby forming a dense cured body. Subsequently, the cured body then falls into the inner cavity of the storage box 12 and is hermetically stored through the storage box 12 to effectively ensure zero leakage of radionuclides.

[0022] In this embodiment, by fixedly installing the waste liquid storage tank 2, the MOFs adsorption column 6, the quartz glass cavity 8, the PTFE pipe 11 and the storage box 12 in the lead tank body 1; the whole process of the waste liquid from being injected into the waste liquid storage tank 2 through the injection port 3 to the storage box 12 is carried out in the closed environment of the lead tank body 1, avoiding the risk of radionuclide leakage and secondary pollution during the distribution and treatment process of the waste liquid. And through the shielding effect of the lead tank body 1 itself, the radiation is effectively blocked, effectively avoiding the risk of radionuclide leakage. And because the whole process of the waste liquid from being injected into the injection port 3 to being stored in the storage box 12 is automatically continuous in the lead tank body 1 without manual intervention, the operation safety is greatly improved and the treatment cycle is shortened.

[0023] Through the synergistic effect of the MOFs adsorption column 6 and the UV-LED array 9 in the whole process, efficient adsorption and curing are realized, ensuring the complete isolation of radionuclides. The MOFs particles can maintain the structural integrity after being irradiated by the UV-LED array 9; and in this embodiment, an anti-radiation agent can also be added to the acrylate resin solution to simultaneously improve the anti-radiation aging ability of the material during the curing process, uniformly dissipate the decay heat, and avoid local overheating.

[0024] Embodiment 2, as a further preferred solution of Embodiment 1, the liquid injection port 3 includes a liquid pouring funnel 31 and a splash-proof groove 32. The splash-proof groove 32 is a spherical cavity structure with upper and lower openings. The upper end of the splash-proof groove 32 is connected to the bottom of the liquid pouring funnel 31, and the lower end of the splash-proof groove 32 is hermetically connected to the top of the waste liquid storage tank 2; a sealing cover plate is movably installed on the liquid pouring funnel 31. Connected through the liquid injection port 3 of the waste liquid storage tank 2, the liquid pouring funnel 31 is used to guide the waste liquid into the splash-proof groove 32, prevent the waste liquid from splashing, and ensure the operation safety. Through the design of the splash-proof groove 32 with a spherical cavity structure, the contact area of the waste liquid is effectively increased, the flow rate is slowed down, and the stability and safety of the waste liquid injection process are further improved. In this embodiment, a hydrophobic material can be coated on the inner wall of the splash-proof groove 32, which can effectively prevent the waste liquid from remaining and ensure that the waste liquid completely flows into the waste liquid storage tank 2.

[0025] Embodiment 3, as a further preferred solution of Embodiment 1, a plurality of layers of stainless steel meshes 13 are fixedly installed inside the MOFs adsorption column 6. The aperture of the stainless steel mesh 13 is 0.3 mm, and adsorption particles 14 are filled between the stainless steel meshes 13. In this embodiment, the adsorption particles 14 are specifically UiO-66-NH2 particles. Thus, a highly ordered porous structure can be formed through the coordination of metal clusters and organic ligands, and its high specific surface area far exceeds that of activated carbon and zeolite, so that alpha nuclides can be effectively adsorbed and the migration of their recoil nuclei can be inhibited. The amount of adsorbent used is reduced and secondary waste generation is avoided.

[0026] In this embodiment, the MOFs adsorption column 6 is arranged at an inclination angle of 30-60 degrees. By adopting the inclined design, the contact time between the waste liquid in the adsorption column and the adsorption particles can be effectively extended, thereby improving the adsorption efficiency and ensuring the complete adsorption of nuclides. In addition, in this embodiment, a plurality of ultrasonic dispersers 15 can be fixedly embedded on the outer surface of the MOFs adsorption column 6. Through the high-frequency vibration of the ultrasonic waves of the ultrasonic dispersers 15, the suspended particles in the waste liquid are dispersed to avoid the agglomeration of MOFs particles.

[0027] Embodiment 4, as a further preferred solution of Embodiment 1, the UV-LED array 9 is fixed on the outer surface of the quartz glass cavity 8 by a buckle. Among them, the buckle is made of a high-temperature resistant material to ensure the stable operation of the UV-LED array 9 in a high-temperature environment.

[0028] Embodiment 5, as a further preferred solution of Embodiment 1, the storage box 12 is made of a composite material of tungsten powder and epoxy resin. The tungsten powder can effectively shield the accompanying neutrons, and the epoxy resin matrix can effectively inhibit the generation of secondary γ-rays; thus, through the synergistic effect of the tungsten powder and the epoxy resin matrix, the radiation shielding effect is significantly improved. In addition, a silane coupling agent is coated on the inner wall of the storage box 12 to enhance the interfacial bonding force of the material and prevent the penetration of rays, further ensuring the safety of the operator and ensuring the efficient and stable operation of the radiation protection system. And the end face of the storage box 12 is laser-sealed to ensure excellent sealing performance and prevent radiation leakage.

[0029] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A rapid adsorption and solidification integrated machine for alpha nuclide waste liquid, characterized in that: It includes a lead tank body (1), above which a waste liquid storage tank (2) is fixedly embedded. Above the waste liquid storage tank (2), a liquid injection port (3) is provided. At the bottom of the waste liquid storage tank (2), a liquid outlet (4) is provided. One end of a corrosion-resistant hose (5) is connected to the liquid outlet (4). The other end of the corrosion-resistant hose (5) is fixedly connected to the inlet end of a MOFs adsorption column (6). The outlet end of the MOFs adsorption column (6) is connected to a quartz glass cavity (8) through a screw conveyor pipe (7). Multiple groups of UV-LED arrays (9) are arranged around the outer surface of the quartz glass cavity (8). A high-pressure atomizing nozzle (10) is fixedly embedded in the side wall of the quartz glass cavity (8). The high-pressure atomizing nozzle (10) is connected to an external resin storage tank through a PTFE pipe (11). The lower end of the quartz glass cavity (8) is hermetically connected to a storage box (12). The waste liquid storage tank (2), the corrosion-resistant hose (5), the MOFs adsorption column (6), the screw conveyor pipe (7), the quartz glass cavity (8), the UV-LED array (9), the high-pressure atomizing nozzle (10), the PTFE pipe (11) and the storage box (12) are all fixedly embedded in the lead tank body (1).

2. The rapid adsorption and solidification integrated machine for alpha nuclide waste liquid according to claim 1, wherein: The liquid injection port (3) includes a pouring funnel (31) and a splash-proof tank (32). The splash-proof tank (32) is a spherical cavity structure with upper and lower openings. The upper end of the splash-proof tank (32) is connected to the bottom of the pouring funnel (31). The lower end of the splash-proof tank (32) is hermetically connected to the top of the waste liquid storage tank (2). A sealing cover plate is movably installed on the pouring funnel (31).

3. The rapid adsorption and solidification integrated machine for alpha nuclide waste liquid according to claim 1, characterized in that: Multiple layers of stainless steel mesh screens (13) are fixedly installed inside the MOFs adsorption column (6), and adsorption particles (14) are filled between the stainless steel mesh screens (13).

4. The rapid adsorption and solidification integrated machine for alpha nuclide waste liquid according to claim 1, wherein: The MOFs adsorption column (6) is arranged at an inclination angle of 30 - 60 degrees.

5. A rapid adsorption and solidification integrated machine for alpha nuclide waste liquid according to claim 1, characterized in that: Multiple ultrasonic dispersers (15) are fixedly embedded on the outer surface of the MOFs adsorption column (6).

6. The rapid adsorption and solidification integrated machine for alpha nuclide waste liquid according to claim 1, wherein: The UV-LED array (9) is fixed to the outer surface of the quartz glass cavity (8) by a buckle.

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