A system and method for treating acidic uranium-containing waste solutions

Abstract

The application provides a treatment system and method of acid uranium-containing waste liquid, wherein the treatment system comprises: a feeding device for obtaining and conveying the acid uranium-containing waste liquid to be treated; an ultrafiltration device in communication with the feeding device, for performing ultrafiltration treatment on the waste liquid to be treated to obtain a first waste liquid and a first precipitate; a nanofiltration device in communication with the ultrafiltration device, for performing nanofiltration treatment on the first waste liquid to obtain a second waste liquid and a second precipitate; and a reverse osmosis device in communication with the nanofiltration device, for performing reverse osmosis treatment on the second waste liquid to obtain a target solution and a third precipitate. The provided scheme can improve the separation and treatment efficiency of trace uranium in the uranium-containing waste liquid and reduce the treatment cost of the waste liquid.

Description

Technical Field

[0001] This invention relates to the field of nuclear fuel reprocessing and analysis technology, and in particular to a system and method for treating acidic uranium-containing waste liquid. Background Technology

[0002] The rapid development of the nuclear industry has generated a large amount of uranium-containing wastewater, which is characterized by complex composition, low concentration, high toxicity, and radioactivity.

[0003] Currently, common methods for treating uranium-containing wastewater include chemical precipitation, ion exchange, biological methods, and membrane separation. Chemical precipitation primarily uses flocculants to settle uranium in the wastewater, suitable for high-concentration uranium wastewater, but the uranium content in the treated wastewater often fails to meet discharge standards. Ion exchange mainly uses ion exchange resins to adsorb uranium from the wastewater, requiring specific resins and desorbing agents to remove saturated resins, resulting in high operating costs. Furthermore, its adsorption capacity is limited in complex environments with low uranium concentrations and high nitric acid concentrations. Biological methods have strict requirements for reaction conditions; microorganisms are greatly affected by the solution environment and are easily interfered with by external factors, leading to numerous limitations. All these issues significantly impact the treatment efficiency and accuracy of uranium-containing wastewater. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a treatment system and method for acidic uranium-containing waste liquid, so as to improve the separation and treatment efficiency of trace uranium in uranium-containing waste liquid and reduce the treatment cost of waste liquid.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A treatment system for acidic uranium-containing waste liquid, comprising:

[0007] Conveying equipment is used to acquire and transport acidic uranium-containing waste liquid to be treated;

[0008] An ultrafiltration device connected to the conveying equipment is used to perform ultrafiltration treatment on the waste liquid to be treated, to obtain a first waste liquid and a first precipitate;

[0009] A nanofiltration device connected to the ultrafiltration device is used to perform nanofiltration treatment on the first waste liquid to obtain a second waste liquid and a second precipitate.

[0010] A reverse osmosis device connected to the nanofiltration device is used to treat the second waste liquid by reverse osmosis to obtain a target solution and a third precipitate.

[0011] Optionally, the treatment system for the acidic uranium-containing waste liquid further includes:

[0012] A compression device, the output end of which is connected to the conveying device, and the input end of which is connected to the ultrafiltration device, the nanofiltration device, and the reverse osmosis device respectively, is used to compress the first precipitate, the second precipitate, and the third precipitate, and to convey the resulting liquid after compression to the conveying device.

[0013] Optionally, the first membrane pore size of the ultrafiltration membrane in the ultrafiltration device is less than 100 nm.

[0014] Optionally, the operating pressure of the ultrafiltration delivery pump in the ultrafiltration equipment is 0.2MPa-0.6MPa.

[0015] Optionally, the second membrane pore size of the first nanofiltration membrane group and the third membrane pore size of the second nanofiltration membrane group in the nanofiltration device are both less than or equal to 10 nm.

[0016] Optionally, the operating pressure of the first nanofiltration transfer pump and the second nanofiltration transfer pump in the nanofiltration equipment is set to 0.8MPa to 1.2MPa.

[0017] Optionally, the fourth pore size of the first reverse osmosis membrane group and the fifth pore size of the second reverse osmosis membrane group in the reverse osmosis equipment are both less than or equal to 5 nm.

[0018] Optionally, the operating pressure of the first reverse osmosis transfer pump and the second reverse osmosis transfer pump in the reverse osmosis equipment is set to 1.2 MPa to 2.0 MPa.

[0019] A method for treating acidic uranium-containing waste liquid, applied to the treatment system described above, the method comprising:

[0020] Acidic uranium-containing waste liquid to be treated is obtained and transported through a conveying device, wherein the uranium content in the waste liquid to be treated is a preset content value;

[0021] The waste liquid to be treated is subjected to ultrafiltration using an ultrafiltration device to obtain a first waste liquid and a first precipitate.

[0022] The first waste liquid is treated by nanofiltration equipment to obtain a second waste liquid and a second precipitate;

[0023] The second waste liquid is treated by reverse osmosis equipment to obtain the target solution and the third precipitate.

[0024] Optionally, the method for treating the acidic uranium-containing waste liquid further includes:

[0025] The first precipitate, the second precipitate, and the third precipitate are conveyed to the compression device;

[0026] The first precipitate, the second precipitate, and the third precipitate are compressed using a compression device, and the resulting liquid is then transported to a conveying device for circulating filtration and separation.

[0027] The above-described solution of the present invention has at least the following beneficial effects:

[0028] The above-described solution of the present invention comprises, in sequence, a feeding device for acquiring and conveying acidic uranium-containing waste liquid to be treated; an ultrafiltration device connected to the feeding device for ultrafiltration treatment of the waste liquid to be treated to obtain a first waste liquid and a first precipitate; a nanofiltration device connected to the ultrafiltration device for nanofiltration treatment of the first waste liquid to obtain a second waste liquid and a second precipitate; and a reverse osmosis device connected to the nanofiltration device for reverse osmosis treatment of the second waste liquid to obtain a target solution and a third precipitate. The solution provided by the present invention can improve the separation and treatment efficiency of trace uranium in uranium-containing waste liquid and reduce the cost of waste liquid treatment. Attached Figure Description

[0029] Figure 1 This is a flowchart of the treatment method for acidic uranium-containing waste liquid provided in the embodiments of the present invention;

[0030] Figure 2 This is a flowchart of a method for treating acidic uranium-containing waste liquid provided in an optional embodiment of the present invention. Detailed Implementation

[0031] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0032] An embodiment of the present invention provides a treatment system for acidic uranium-containing waste liquid, comprising:

[0033] Conveying equipment is used to acquire and transport acidic uranium-containing waste liquid to be treated;

[0034] An ultrafiltration device connected to the conveying equipment is used to perform ultrafiltration treatment on the waste liquid to be treated, to obtain a first waste liquid and a first precipitate;

[0035] A nanofiltration device connected to the ultrafiltration device is used to perform nanofiltration treatment on the first waste liquid to obtain a second waste liquid and a second precipitate.

[0036] A reverse osmosis device connected to the nanofiltration device is used to treat the second waste liquid by reverse osmosis to obtain a target solution and a third precipitate.

[0037] In this embodiment, the feeding device, the ultrafiltration device, the nanofiltration device, and the reverse osmosis device are arranged in series. The output end of the feeding device and the input end of the ultrafiltration device can be connected through a pipeline, the output end of the ultrafiltration device and the input end of the nanofiltration device can be connected through a first booster pump, and the output end of the nanofiltration device and the input end of the reverse osmosis device can be connected through a second booster pump.

[0038] Here, the conveying equipment can be a feed pump, which pumps the first acidic uranium-containing waste liquid to be treated to the ultrafiltration equipment after obtaining it.

[0039] The ultrafiltration equipment may include an ultrafiltration delivery pump, an ultrafiltration membrane, and a freshwater tank arranged in sequence. After the waste liquid to be treated is transported to the ultrafiltration equipment by the conveying equipment, it is pumped to the ultrafiltration membrane by the ultrafiltration pump to intercept and filter particles, colloids, organic macromolecules and other substances in the waste liquid to be treated, and as the first precipitate. The first waste liquid generated after filtration flows into the freshwater tank, and can be pumped to the nanofiltration equipment for nanofiltration treatment by the first booster pump.

[0040] The nanofiltration equipment may include a first nanofiltration delivery pump, a first nanofiltration module, a first nanofiltration water tank, a second nanofiltration delivery pump, a second nanofiltration membrane module, and a second nanofiltration water tank arranged sequentially. The first waste liquid can be delivered to the nanofiltration equipment through the booster pump, and then the first nanofiltration pump and the second nanofiltration pump are started, so that the first waste liquid passes through the first nanofiltration module, the first nanofiltration water tank, the second nanofiltration membrane module, and the second nanofiltration water tank in sequence to remove second-order and high-valence ions in the first waste liquid. The solid waste generated after passing through the first nanofiltration module and the second nanofiltration membrane module is used as the second precipitate, and the waste liquid is the second waste liquid. It is then pumped to the reverse osmosis equipment for further reverse osmosis treatment by the second booster pump.

[0041] The reverse osmosis equipment may include a first reverse osmosis transfer pump, a first reverse osmosis module, a second reverse osmosis transfer pump, a second reverse osmosis module, a reverse osmosis water tank, and an output pipeline arranged in sequence. The second waste liquid can be transported to the reverse osmosis equipment by the second booster pump, and then the first reverse osmosis pump and the second reverse osmosis pump are started, so that the second waste liquid passes through the first reverse osmosis module and the second reverse osmosis module in sequence to remove inorganic salts, metal ions, organic matter, colloids, etc. from the second waste liquid. The solid waste generated after passing through the first reverse osmosis module and the second reverse osmosis module is used as a third precipitate, and the waste liquid flows into the reverse osmosis water tank as the target solution.

[0042] Furthermore, the target solution in the reverse osmosis water tank can be sampled and tested. When the uranium content in the target solution is less than or equal to 20 ug / L, it indicates that the solution after ultrafiltration, nanofiltration and reverse osmosis treatment has met the discharge standard, and it can be discharged through the output pipe.

[0043] Preferably, the reverse osmosis tank in the reverse osmosis equipment and the first nanofiltration tank in the nanofiltration equipment can be connected by a circulation pump. When the uranium content in the target solution is greater than 20 ug / L, the target solution at this time is pumped to the first nanofiltration tank by the circulation pump for circulating nanofiltration and reverse osmosis treatment.

[0044] In one feasible example of the present invention, the bottom of the freshwater tank in the ultrafiltration device can be connected to the input end of the conveying device via a first circulation pump; the bottom of the second nanofiltration tank in the nanofiltration device can be connected to the input end of the conveying device via a second circulation pump; the bottom of the reverse osmosis tank in the reverse osmosis device can be connected to the input end of the conveying device via a third circulation pump; the first circulation pump can pump the lower concentrate of the first waste liquid in the freshwater tank to the conveying device for internal circulation treatment (performing ultrafiltration, nanofiltration, and reverse osmosis treatment in sequence); the second circulation pump can pump the lower concentrate of the second waste liquid in the second nanofiltration tank to the conveying device for internal circulation treatment (performing ultrafiltration, nanofiltration, and reverse osmosis treatment in sequence); the third circulation pump can transport the lower concentrate of the target solution in the reverse osmosis tank to the conveying device for internal circulation treatment (performing ultrafiltration, nanofiltration, and reverse osmosis treatment in sequence), further improving the efficiency of uranium removal from the waste liquid;

[0045] The system provided in the above embodiments treats acidic uranium-containing wastewater. After treatment by the ultrafiltration and nanofiltration equipment, the uranium content in the wastewater can be reduced to below 100 μg / L. Furthermore, after treatment by the reverse osmosis equipment, the uranium content in the wastewater can be reduced to below 20 μg / L to meet the requirements for production wastewater discharge. At the same time, using this system to treat wastewater, acidic uranium-containing wastewater with a uranium content of less than or equal to 1 mg / L can be treated to a uranium content of less than or equal to 20 μg / L without the addition of additional chemical reagents. This can achieve the removal of trace uranium from the wastewater, improve the treatment efficiency of trace uranium in the wastewater, and reduce the treatment cost of trace uranium in the wastewater.

[0046] In an optional embodiment of the present invention, the treatment system for the acidic uranium-containing waste liquid may further include:

[0047] A compression device, the output end of which is connected to the conveying device, and the input end of which is connected to the ultrafiltration device, the nanofiltration device, and the reverse osmosis device respectively, is used to compress the first precipitate, the second precipitate, and the third precipitate, and to convey the resulting liquid after compression to the conveying device.

[0048] In this embodiment, the input end of the compression device is connected to the ultrafiltration device, the nanofiltration device, and the reverse osmosis device, respectively, to receive the first precipitate generated in the ultrafiltration device, the second precipitate generated in the nanofiltration device, and the third precipitate generated in the reverse osmosis device. The first precipitate, the second precipitate, and the third precipitate are compressed, and the resulting liquid is transported to the conveying device for internal circulation (ultrafiltration, nanofiltration, and reverse osmosis are performed sequentially). The solid material generated after compression is collected as nuclear material, and the filtrate is input to the conveying device through the output end of the compression device for circulation, thereby improving the treatment efficiency of acidic uranium-containing waste liquid and the utilization rate of nuclear material in the waste liquid.

[0049] Preferably, the input end of the compression device can also be connected to the freshwater tank in the ultrafiltration device, the second nanofiltration tank in the nanofiltration device, and the reverse osmosis tank in the reverse osmosis device via the first circulation pump, the second circulation pump, and the third circulation pump, respectively. The lower concentrate of the first waste liquid in the freshwater tank, the lower concentrate of the second waste liquid in the second nanofiltration tank, and the lower concentrate of the target solution in the reverse osmosis tank are sequentially pumped to the compression device for flocculation and compression treatment via the first circulation pump, the second circulation pump, and the third circulation pump, respectively. The solid material produced after compression is collected as nuclear material, and the filtrate is input to the conveying device through the output end of the compression device for further internal circulation treatment (sequentially performing ultrafiltration, nanofiltration, and reverse osmosis treatments). This further improves the treatment efficiency of the acidic uranium-containing waste liquid and the utilization rate of nuclear material in the waste liquid.

[0050] Preferably, during the flocculation and compression treatment, 12wt‰ to 2wt‰ of flocculant can be added to the lower concentrate for flocculation treatment, the solid material generated after flocculation is compressed, and the solution generated after flocculation and compression is circulated; here, the flocculant can be polyacrylamide.

[0051] In an optional embodiment of the present invention, the first membrane pore size of the ultrafiltration membrane in the ultrafiltration device is less than 100 nm.

[0052] In this embodiment, the pore size of the first membrane of the ultrafiltration is set to be less than 100 nm to effectively filter out particles, colloids, organic macromolecules and other substances in the waste liquid to be treated; preferably, the ultrafiltration membrane can be made of PVDF polyvinylidene fluoride material; by utilizing the sieving effect of the membrane pores of the ultrafiltration membrane, substances larger than the membrane pore size in the waste liquid can be retained, which can avoid the use of chemical agents, improve the waste liquid treatment efficiency and reduce the treatment cost at the same time.

[0053] In an optional embodiment of the present invention, the operating pressure of the ultrafiltration delivery pump in the ultrafiltration device is 0.2MPa-0.6MPa.

[0054] In this embodiment, the working pressure of the ultrafiltration delivery pump can be set to 0.2MPa-0.6MPa. By precisely controlling the pressure of the ultrafiltration delivery pump, the uranium content in the final output target solution can be controlled, thereby improving the waste liquid treatment efficiency and ensuring that the target solution meets the emission standards.

[0055] In an optional embodiment of the present invention, the second membrane pore size of the first nanofiltration membrane group and the third membrane pore size of the second nanofiltration membrane group arranged sequentially in the nanofiltration device are both less than or equal to 10 nm.

[0056] In this embodiment, the second membrane pore size of the first nanofiltration membrane group and the third membrane pore size of the second nanofiltration membrane group are both less than or equal to 10 nm, so as to effectively intercept divalent and high-valence uranium ions in the first waste liquid, thereby reducing the uranium content in the first waste liquid to below 100 ug / L; preferably, the filter membranes in the first nanofiltration membrane group and the second nanofiltration membrane group can be made of polyamide material, so as to be selective in intercepting polyvalent uranyl ions, thereby improving the treatment efficiency of waste liquid.

[0057] In an optional embodiment of the present invention, the working pressure of the first nanofiltration delivery pump and the second nanofiltration delivery pump in the nanofiltration device can both be set to 0.8 MPa to 1.2 MPa.

[0058] In this embodiment, the working pressure of both the first nanofiltration transfer pump and the second nanofiltration transfer pump can be set to 0.8MPa to 1.2MPa. By precisely controlling the pressure of the first nanofiltration transfer pump and the second nanofiltration transfer pump, the uranium content in the final output target solution can be controlled, thereby improving the efficiency of waste liquid treatment and enabling the target solution to meet emission standards.

[0059] In an optional embodiment of the present invention, the fourth pore size of the first reverse osmosis membrane group and the fifth pore size of the second reverse osmosis membrane group arranged sequentially in the reverse osmosis device are both less than or equal to 5 nm.

[0060] In this embodiment, the fourth pore size of the first reverse osmosis membrane group and the fifth pore size of the second reverse osmosis membrane group are both less than or equal to 5 nm, so as to effectively intercept inorganic salts, metal ions, organic matter and colloids in the second waste liquid, so that the uranium content in the target solution after reverse osmosis treatment can be reduced to below 20 ug / L; preferably, the filter membranes in the first reverse osmosis membrane group and the second reverse osmosis membrane group can be made of polyamide material to improve the treatment efficiency of waste liquid.

[0061] In an optional embodiment of the present invention, the operating pressure of the first reverse osmosis transfer pump and the second reverse osmosis transfer pump in the reverse osmosis equipment can both be 1.2 MPa to 2.0 MPa.

[0062] In this embodiment, the operating pressure of both the first reverse osmosis transfer pump and the second reverse osmosis transfer pump can be set to 1.2 MPa to 2.0 MPa. By precisely controlling the pressure of the first reverse osmosis transfer pump and the second reverse osmosis transfer pump, the uranium content in the final output target solution can be controlled, thereby improving the efficiency of waste liquid treatment and enabling the target solution to meet emission standards.

[0063] like Figure 1 As shown, embodiments of the present invention also provide a method for treating acidic uranium-containing waste liquid, applied to the treatment system described in the above embodiments, the method comprising:

[0064] Step 11: Acquire and transport acidic uranium-containing waste liquid to be treated through a conveying device, wherein the uranium content in the waste liquid to be treated is a preset content value;

[0065] Step 12: The waste liquid to be treated is subjected to ultrafiltration treatment using an ultrafiltration device to obtain a first waste liquid and a first precipitate;

[0066] Step 13: The first waste liquid is subjected to nanofiltration treatment using a nanofiltration device to obtain a second waste liquid and a second precipitate;

[0067] Step 14: The second waste liquid is treated by reverse osmosis equipment to obtain the target solution and the third precipitate.

[0068] Furthermore, based on steps 11 to 14 above, the following may also be included:

[0069] Step 15: The first precipitate, the second precipitate, and the third precipitate are conveyed to the compression device;

[0070] Step 16: The first precipitate, the second precipitate, and the third precipitate are compressed using a compression device, and the resulting liquid is transported to the conveying device for circulating filtration and separation.

[0071] In this embodiment, the uranium content in the waste liquid to be treated is less than or equal to 1 mg / L. By sequentially passing the waste liquid to be treated through the ultrafiltration device, the first waste liquid resulting from the ultrafiltration treatment through the nanofiltration device, and the second waste liquid resulting from the nanofiltration treatment through the reverse osmosis device, the uranium content in the waste liquid to be treated can be reduced to below 20 μg / L, meeting the requirements for industrial wastewater discharge. Furthermore, this method can reduce the uranium content in the waste liquid containing trace amounts of uranium to below 20 μg / L without adding any additional chemical reagents, thus improving the uranium treatment efficiency and reducing waste liquid treatment costs.

[0072] Furthermore, the first precipitate produced after ultrafiltration, the second precipitate produced after nanofiltration, and the third precipitate produced after reverse osmosis are transported to the compression equipment for compression, and the liquid produced after compression is transported to the conveying equipment for circulating filtration and separation. The resulting solid material is collected as nuclear material, thereby further improving the treatment efficiency of uranium-containing waste liquid and the utilization rate of nuclear material in the waste liquid.

[0073] like Figure 2 As shown, in an optional embodiment of the present invention, the method of the above embodiment will be described, and the specific process of treating the uranium-containing waste liquid is as follows:

[0074] Step 21, Ultrafiltration: The uranium-containing waste liquid to be treated is transported to the ultrafiltration equipment via the conveying equipment. At this time, the ultrafiltration conveying pump is turned on and the working pressure of the ultrafiltration conveying pump is adjusted to 0.2MPa-0.6MPa to remove particulate matter. The first waste liquid generated after ultrafiltration enters the freshwater tank. The lower concentrated liquid in the first waste liquid in the freshwater tank is pumped to the compression equipment via the first circulation pump. After flocculation and compression treatment, the resulting liquid is transported to the conveying equipment for internal recirculation treatment. The resulting solid material is collected as nuclear material. The first precipitate generated after ultrafiltration is fed into the compression equipment for compression treatment. The resulting liquid is transported to the conveying equipment for internal recirculation treatment. The resulting solid material is collected as nuclear material.

[0075] Step 22, Nanofiltration: The supernatant from the first waste liquid in the freshwater tank is pumped to the nanofiltration equipment by the first booster pump. At this time, the first and second nanofiltration transfer pumps are turned on, and their working pressures are adjusted to 0.8 MPa to 1.2 MPa. After entering the nanofiltration equipment, the supernatant from the first waste liquid is pumped to the first nanofiltration membrane module by the first nanofiltration transfer pump for filtration. The resulting filtrate enters the first nanofiltration water tank. The filtrate in the first nanofiltration water tank is pumped to the second nanofiltration membrane module by the second nanofiltration transfer pump for filtration. The resulting filtrate is sent to a second nanofiltration tank as the second waste liquid. The lower concentrated layer of the second waste liquid in the second nanofiltration tank is pumped to a compression device via a second circulation pump. After flocculation and compression, the resulting liquid is transported to a conveying device for internal recirculation. The solid material produced is collected as nuclear material. The second precipitate produced after two nanofiltration processes is fed into the compression device for compression. The liquid produced after compression is then transported to the conveying device for internal recirculation. The solid material produced after compression is collected as nuclear material.

[0076] Step 23, Reverse Osmosis: The supernatant of the second waste liquid in the second nanofiltration tank is pumped to the reverse osmosis equipment by the second booster pump. At this time, the first and second reverse osmosis transfer pumps are turned on, and their working pressures are adjusted to 1.2 MPa to 2.0 MPa. After entering the reverse osmosis equipment, the supernatant of the second waste liquid is pumped to the first reverse osmosis membrane module for filtration by the first reverse osmosis transfer pump. The resulting filtrate is pumped to the second reverse osmosis membrane module for filtration by the second reverse osmosis transfer pump. The resulting filtrate enters the reverse osmosis tank as the first target solution. The third precipitate produced after two reverse osmosis treatments is fed into the compression equipment for compression. The resulting feed liquid after compression is transported to the feed equipment for internal recirculation. The solid material produced after compression is collected as nuclear material.

[0077] Step 24, Uranium content detection: The target solution in the reverse osmosis tank is sampled and tested. When the uranium content in the target solution is less than or equal to 20 ug / L, the target solution is pumped to the discharge tank for discharge through a magnetic pump and an output pipeline. When the uranium content in the target solution is greater than 20 ug / L, the target solution is pumped to the first nanofiltration tank for circulating nanofiltration and reverse osmosis treatment through the fourth circulation pump that connects the reverse osmosis tank in the reverse osmosis equipment to the first nanofiltration tank in the nanofiltration equipment, so that the solution meets the discharge requirements.

[0078] The method provided by the above embodiments of the present invention can reduce the uranium content in waste liquid containing trace amounts of uranium (uranium content ≤1mg / L) to below 20μg / L, meeting the production wastewater discharge standards; at the same time, no chemical reagents need to be added during the entire ultrafiltration, nanofiltration, and reverse osmosis cycle treatment process, reducing the cost of waste liquid treatment.

[0079] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A treatment system for acidic uranium-containing waste liquid, characterized in that, include: Conveying equipment is used to acquire and transport acidic uranium-containing waste liquid to be treated; An ultrafiltration device connected to the conveying equipment is used to perform ultrafiltration treatment on the waste liquid to be treated, to obtain a first waste liquid and a first precipitate; A nanofiltration device connected to the ultrafiltration device is used to perform nanofiltration treatment on the first waste liquid to obtain a second waste liquid and a second precipitate. A reverse osmosis device connected to the nanofiltration device is used to treat the second waste liquid by reverse osmosis to obtain a target solution and a third precipitate; The reverse osmosis equipment includes a first reverse osmosis transfer pump, a first reverse osmosis module, a second reverse osmosis transfer pump, a second reverse osmosis module, a reverse osmosis water tank, and an output pipeline arranged in sequence; the working pressure of the first reverse osmosis transfer pump and the second reverse osmosis transfer pump in the reverse osmosis equipment is both set to 1.2MPa~2.0MPa; The reverse osmosis water tank in the reverse osmosis equipment is connected to the first nanofiltration water tank in the nanofiltration equipment via a circulation pump; The ultrafiltration equipment includes an ultrafiltration delivery pump, an ultrafiltration membrane, and a freshwater tank arranged in sequence. The nanofiltration equipment includes a first nanofiltration delivery pump, a first nanofiltration module, a first nanofiltration water tank, a second nanofiltration delivery pump, a second nanofiltration membrane module, and a second nanofiltration water tank arranged in sequence. The bottom of the freshwater tank in the ultrafiltration device is connected to the input end of the conveying device via a first circulation pump; The bottom of the second nanofiltration tank in the nanofiltration device is connected to the input end of the material conveying device via a second circulation pump; the bottom of the reverse osmosis tank in the reverse osmosis device is connected to the input end of the material conveying device via a third circulation pump. A compression device, the output end of which is connected to the conveying device, and the input end of which is connected to the ultrafiltration device, the nanofiltration device, and the reverse osmosis device respectively, is used to compress the first precipitate, the second precipitate, and the third precipitate, and to convey the liquid produced after compression to the conveying device; Wherein, the first membrane pore size of the ultrafiltration membrane in the ultrafiltration device is less than 100 nm; the second membrane pore size of the first nanofiltration membrane group and the third membrane pore size of the second nanofiltration membrane group in the nanofiltration device are both less than or equal to 10 nm; the fourth membrane pore size of the first reverse osmosis membrane group and the fifth membrane pore size of the second reverse osmosis membrane group in the reverse osmosis device are both less than or equal to 5 nm.

2. The treatment system for acidic uranium-containing waste liquid according to claim 1, characterized in that, The working pressure of the ultrafiltration delivery pump in the ultrafiltration equipment is 0.2MPa-0.6MPa.

3. The treatment system for acidic uranium-containing waste liquid according to claim 1, characterized in that, The operating pressure of the first nanofiltration delivery pump and the second nanofiltration delivery pump in the nanofiltration equipment is set to 0.8MPa~1.2MPa.

4. A method for treating acidic uranium-containing waste liquid, characterized in that, Applied to the processing system as described in any one of claims 1 to 3, the method comprises: Acidic uranium-containing waste liquid to be treated is obtained and transported through a conveying device, wherein the uranium content in the waste liquid to be treated is a preset content value; The waste liquid to be treated is subjected to ultrafiltration using an ultrafiltration device to obtain a first waste liquid and a first precipitate. The first waste liquid is treated by nanofiltration equipment to obtain a second waste liquid and a second precipitate; The second waste liquid is treated by reverse osmosis equipment to obtain the target solution and the third precipitate; The first precipitate, the second precipitate, and the third precipitate are conveyed to the compression device; The second waste liquid is transported to the reverse osmosis equipment, and then the first reverse osmosis transfer pump and the second reverse osmosis transfer pump are started, so that the second waste liquid passes through the first reverse osmosis module and the second reverse osmosis module in sequence. The solid waste generated by the first reverse osmosis module and the second reverse osmosis module is used as the third precipitate, and the waste liquid flows into the reverse osmosis water tank as the target solution. The reverse osmosis water tank in the reverse osmosis equipment is connected to the first nanofiltration water tank in the nanofiltration equipment through a circulation pump. When the uranium content in the target solution is greater than 20ug / L, the target solution at this time is pumped to the first nanofiltration water tank for circulating nanofiltration and reverse osmosis treatment by the circulation pump. The lower concentrated liquid of the first waste liquid in the freshwater tank is pumped to the conveying equipment for internal circulation treatment by the first circulation pump. The lower concentrate of the second waste liquid in the second nanofiltration tank is pumped to the internal circulation treatment of the conveying equipment by the second circulation pump. The lower concentrate of the target solution in the reverse osmosis tank is transported to the feeding equipment for internal circulation treatment by the third circulation pump. The first precipitate, the second precipitate, and the third precipitate are conveyed to the compression device; The first precipitate, the second precipitate, and the third precipitate are compressed using a compression device, and the resulting liquid is then transported to a conveying device for circulating filtration and separation until the uranium content in the waste liquid is reduced to below 20 μg / L.

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