Method, device and equipment for treating alkaline waste solution containing uranium and fluorine

Abstract

The application provides a treatment method, device and equipment for alkaline uranium-containing fluorine-containing waste liquid, and relates to the field of nuclear fuel.The method comprises the following steps: obtaining first waste liquid to be treated containing uranium and fluorine; performing alkaline precipitation treatment on the first waste liquid to be treated to obtain first treated waste liquid and first target precipitate; adjusting the pH value of the first treated waste liquid to a first preset value to obtain second treated waste liquid; performing alkalization treatment on the second treated waste liquid to obtain third treated waste liquid; and performing pretreatment on the third treated waste liquid to obtain target solution and second target precipitate.The scheme of the application realizes rapid treatment of the alkaline uranium-containing fluorine-containing waste liquid, has high treatment precision, and has low uranium content in the treated waste liquid, and simultaneously improves the recovery rate of metal uranium in the alkaline uranium-containing fluorine-containing waste liquid, and avoids loss of nuclear materials.

Description

Technical Field

[0001] This invention relates to the field of nuclear fuel, and specifically to a method, apparatus, and equipment for treating alkaline uranium- and fluorine-containing waste liquid. Background Technology

[0002] The treatment of alkaline uranium- and fluorine-containing waste liquid plays a crucial role in the uranium purification and conversion production process, serving as an important line of defense to ensure reduced uranium resource loss and environmental protection. Uranium conversion production lines generate large quantities of uranium-containing waste liquid, characterized by its large volume, high content of solid impurities, high salt content, and the presence of nitrate ions and organic phases. Currently, the commonly used treatment methods involve chemical precipitation and centrifugation to remove precipitates. However, these methods are inefficient and lack precision, resulting in a uranium content of only around 40 mg / L in the treated waste liquid. This is insufficient to guarantee that subsequent processes will meet emission standards, making it impossible for the treated waste liquid to meet discharge requirements and reducing the uranium recovery rate. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a method, apparatus and equipment for treating alkaline uranium- and fluorine-containing waste liquid, which solves the problems of low treatment efficiency, insufficient treatment accuracy and excessive uranium content in the treated waste liquid when treating existing alkaline uranium- and fluorine-containing waste liquid.

[0004] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0005] An embodiment of the present invention provides a method for treating alkaline uranium- and fluorine-containing waste liquid, comprising:

[0006] Obtain the first alkaline waste liquid containing uranium and fluorine to be treated;

[0007] The first waste liquid to be treated is subjected to alkaline precipitation treatment to obtain the first waste liquid and the first target precipitate;

[0008] The pH of the first treated waste liquid is adjusted to a first preset value to obtain the second treated waste liquid;

[0009] The second waste liquid is subjected to alkalization treatment to obtain the third waste liquid;

[0010] The third waste liquid is pretreated to obtain the target solution and the second target precipitate.

[0011] Optionally, the first waste liquid to be treated is subjected to alkaline precipitation treatment to obtain a first waste liquid and a first target precipitate, including:

[0012] The pH of the first waste liquid to be treated is adjusted to a second preset value to obtain the second waste liquid to be treated;

[0013] The second waste liquid to be treated was subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a first supernatant and a first precipitate;

[0014] The first precipitate is subjected to pressure filtration to obtain the first target precipitate and the first filtrate;

[0015] The first filtrate and the first supernatant are mixed to form the first waste liquid.

[0016] Optionally, adjusting the pH of the first waste liquid to be treated to a second preset value to obtain a second waste liquid to be treated includes:

[0017] The pH of the first waste liquid to be treated is adjusted to a second preset value by using a sodium hydroxide solution of a first preset concentration, thereby obtaining a second waste liquid to be treated. The value of the second preset value ranges from 9 to 11.

[0018] Optionally, the pH of the first treated waste liquid is adjusted to a first preset value to obtain a second treated waste liquid, including:

[0019] The pH of the first treated waste liquid is adjusted to a first preset value by using sulfuric acid of a second preset concentration. The first preset value ranges from 3 to 5.

[0020] Optionally, the second waste liquid is subjected to alkalization treatment to obtain a third waste liquid, including:

[0021] The pH of the second treated waste liquid is adjusted to a third preset value by using a sodium hydroxide solution of a third preset concentration, thereby obtaining a third treated waste liquid. The value of the third preset value ranges from 9 to 11.

[0022] Optionally, the third waste liquid is pretreated to obtain the target solution and the second target precipitate, including:

[0023] The third waste liquid is subjected to flocculation and sedimentation treatment to obtain the fourth waste liquid and the second target precipitate;

[0024] The fourth waste liquid is subjected to multi-media filtration to obtain the fifth waste liquid;

[0025] The fifth waste liquid is subjected to oil removal treatment to obtain the target solution.

[0026] Optionally, the third wastewater is subjected to flocculation and sedimentation treatment to obtain a fourth wastewater and a second target precipitate; including:

[0027] The third treatment waste liquid is subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a second supernatant and a second precipitate;

[0028] The second precipitate is subjected to pressure filtration to obtain a second target precipitate and a second filtrate;

[0029] The second filtrate and the second supernatant are mixed to form the fourth waste liquid.

[0030] Embodiments of the present invention also provide a treatment apparatus for alkaline uranium- and fluorine-containing waste liquid, comprising:

[0031] The acquisition module is used to acquire the first alkaline uranium- and fluorine-containing waste liquid to be treated.

[0032] The processing module is used to perform alkaline precipitation treatment on the first waste liquid to be treated to obtain a first treated waste liquid and a first target precipitate; adjust the pH of the first treated waste liquid to a first preset value to obtain a second treated waste liquid; perform alkalization treatment on the second treated waste liquid to obtain a third treated waste liquid; and perform pretreatment on the third treated waste liquid to obtain a target solution and a second target precipitate.

[0033] An embodiment of the present invention also provides a computing device, including: a processor and a memory storing a computer program, wherein the computer program, when run by the processor, performs the above-described method for treating alkaline uranium- and fluorine-containing waste liquid.

[0034] Embodiments of the present invention also provide a computer-readable storage medium, comprising: stored instructions, which, when executed on a computer, cause the computer to perform the above-described method for treating alkaline uranium- and fluorine-containing waste liquid.

[0035] The above-described solution of the present invention has at least the following beneficial effects:

[0036] The method for treating alkaline uranium- and fluorine-containing waste liquid according to the present invention includes: obtaining a first alkaline uranium- and fluorine-containing waste liquid to be treated; subjecting the first waste liquid to alkaline precipitation treatment to obtain a first treated waste liquid and a first target precipitate; adjusting the pH of the first treated waste liquid to a first preset value to obtain a second treated waste liquid; subjecting the second treated waste liquid to alkalization treatment to obtain a third treated waste liquid; and pretreating the third treated waste liquid to obtain a target solution and a second target precipitate. This method achieves rapid treatment of alkaline uranium- and fluorine-containing waste liquid with high precision, resulting in a low uranium content in the treated waste liquid, while simultaneously improving the recovery rate of metallic uranium from the alkaline uranium- and fluorine-containing waste liquid and preventing the loss of nuclear materials. Attached Figure Description

[0037] Figure 1 This is a schematic flowchart of the treatment method for alkaline uranium- and fluorine-containing waste liquid of the present invention.

[0038] Figure 2 This is a schematic diagram of the specific process for treating alkaline uranium- and fluorine-containing waste liquid according to the present invention.

[0039] Figure 3 This is a schematic diagram of the module block of the alkaline uranium- and fluorine-containing waste liquid treatment device of the present invention. Detailed Implementation

[0040] 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.

[0041] like Figure 1 and Figure 2 As shown, an embodiment of the present invention proposes a method for treating alkaline uranium- and fluorine-containing waste liquid, comprising:

[0042] Step 11: Obtain the first alkaline uranium- and fluorine-containing waste liquid to be treated;

[0043] Step 12: Perform alkaline precipitation treatment on the first waste liquid to be treated to obtain the first waste liquid and the first target precipitate;

[0044] Step 13: Adjust the pH of the first treated waste liquid to a first preset value to obtain the second treated waste liquid;

[0045] Step 14: Alkaliize the second waste liquid to obtain the third waste liquid;

[0046] Step 15: Pre-treat the third waste liquid to obtain the target solution and the second target precipitate.

[0047] In this embodiment, in actual production, the first waste liquid to be treated can be a uranium- and fluorine-containing alkaline solution such as rinsing liquid from an exhaust purification center, cleaning waste liquid, and laundry waste liquid; both the first and second target precipitates are sodium diuranate; the treatment method for the alkaline uranium- and fluorine-containing waste liquid, through alkaline precipitation, solution pH adjustment, and pretreatment, can achieve impurity removal treatment for alkaline uranium- and fluorine-containing wastewater with a large amount of solid impurities and high salt content, with high treatment precision and efficiency. The impurity content and uranium content in the treated wastewater are significantly reduced, reducing the uranium content in the wastewater to below 5 mg / L, COD ≤ 40 mg / L, and turbidity ≤ 5 NTU; the treated wastewater can meet the conditions for membrane entry, providing a guarantee for subsequent membrane treatment processes. At the same time, the treatment process also improves the recovery rate of metallic uranium in the alkaline uranium- and fluorine-containing waste liquid, avoiding the loss of nuclear materials.

[0048] In an optional embodiment of the present invention, step 12 may include:

[0049] Step 121: Adjust the pH of the first waste liquid to be treated to a second preset value to obtain the second waste liquid to be treated;

[0050] Step 122: The second waste liquid to be treated is subjected to sedimentation treatment with ferric chloride and demulsifier to obtain the first supernatant and the first precipitate;

[0051] Step 123: Perform pressure filtration on the first precipitate to obtain the first target precipitate and the first filtrate;

[0052] Step 124: Mix the first filtrate and the first supernatant to form the first waste liquid.

[0053] In this embodiment, the pH of the first waste liquid to be treated is adjusted to a second preset value to obtain the second waste liquid to be treated. Specifically, the pH of the first waste liquid to be treated is adjusted to the second preset value using a sodium hydroxide solution of a first preset concentration to obtain the second waste liquid to be treated. The value of the second preset value is in the range of 9 to 11. The first preset concentration sodium hydroxide solution is a 25% sodium hydroxide solution. Specifically, the second waste liquid to be treated is subjected to sedimentation treatment using ferric chloride and a demulsifier to obtain the first supernatant and the first precipitate. Specifically, the second waste liquid to be treated is subjected to sedimentation treatment using 38% FeCl3 and a demulsifier. The Fe(OH)3 colloid generated by the hydrolysis of FeCl3 adsorbs the suspended impurity particles in the second waste liquid to form flocs. The demulsifier can be used to destroy the oil-in-water or water-in-oil structure formed by the water-oil mixture in the wastewater, so that the oil substances in the solution co-precipitate with the flocs to obtain the first supernatant and the first precipitate. Then, the first precipitate is subjected to pressure filtration treatment to obtain the first target precipitate and the first filtrate.

[0054] In an optional embodiment of the present invention, step 13 may include:

[0055] The pH of the first treated waste liquid is adjusted to a first preset value by using sulfuric acid of a second preset concentration. The first preset value ranges from 3 to 5.

[0056] In this embodiment, the second preset concentration of sulfuric acid is 10% sulfuric acid; by adjusting the pH of the first treated waste liquid to the first preset value, the carbonate ions in the first treated waste liquid can be decomposed under acidic conditions, thereby removing the carbonate ions in the first treated waste liquid and eliminating the influence of carbonate ions on the alkalization of subsequent processes.

[0057] In an optional embodiment of the present invention, step 14 may include:

[0058] The pH of the second treated waste liquid is adjusted to a third preset value by using a sodium hydroxide solution of a third preset concentration to obtain a third treated waste liquid. The value of the third preset value ranges from 9 to 11, and the sodium hydroxide solution of the third preset concentration is a 30% sodium hydroxide solution.

[0059] In an optional embodiment of the present invention, step 15 may include:

[0060] The third waste liquid is subjected to flocculation and sedimentation treatment to obtain the fourth waste liquid and the second target precipitate;

[0061] The fourth waste liquid is subjected to multi-media filtration to obtain the fifth waste liquid;

[0062] The fifth waste liquid is subjected to oil removal treatment to obtain the target solution.

[0063] In this embodiment, the third wastewater is subjected to flocculation and sedimentation treatment to obtain the fourth wastewater and the second target precipitate. Specifically, this may include: the third wastewater is introduced into a flocculation tank, and then a demulsifier and 38% ferric chloride are added to the flocculation tank. The Fe(OH)3 colloid produced after FeCl3 hydrolysis reacts with other colloidal particles in the water through adsorption and surface contact to form flocs. If the wastewater contains oily substances, the oily substances can be co-precipitated by adding a demulsifier. In a preferred embodiment, during the flocculation and sedimentation process, a coagulant aid, polyacrylamide (PAM), can be added to the third wastewater to aggregate small flocs into large flocs, accelerating the flocculation and sedimentation efficiency and thus accelerating the formation of the second precipitate. After flocculation and sedimentation, solid-liquid separation is achieved, thereby quickly obtaining the second supernatant and the second precipitate. Then, the second precipitate is subjected to pressure filtration to obtain the second target precipitate and the second filtrate. The second filtrate and the second supernatant are mixed to form the fourth wastewater.

[0064] In this embodiment, the fourth wastewater is subjected to multi-media filtration to obtain the fifth wastewater, and the fifth wastewater is subjected to oil removal treatment to obtain the target solution. The specific process is as follows: the fourth wastewater is passed into a multi-media filtration tower, where small particulate impurities in the wastewater are adsorbed and filtered by quartz sand of different particle sizes. Then, the wastewater after treatment by the multi-media filtration tower, i.e., the fifth wastewater, is passed into an oil removal resin tower. The oil in the fifth wastewater is separated, emulsified, and dissolved in the oil removal resin tower. The oil is adsorbed and intercepted on the surface of the oil removal resin. When the oil collected by the oil removal resin reaches saturation, it is impacted by the water flow, and the enriched oil falls off the resin surface in the form of large oil droplets and flows out from the overflow port of the oil removal resin tower. Then, the solution after removing impurities, i.e., the target solution, is discharged through the outlet of the oil removal resin tower.

[0065] The method for treating alkaline uranium- and fluorine-containing wastewater according to the present invention includes the following specific implementation steps: First, the alkaline uranium- and fluorine-containing wastewater is received by a wastewater receiving tank and allowed to settle naturally. Then, it is pumped to a first alkalization tank via a pneumatic pump. Alkalinization is performed in the first alkalization tank to generate a first supernatant and a first precipitate. The first supernatant overflows into a first settling tank for further settling. The settled first supernatant is then pumped to a uranium-containing wastewater receiving tank via a supernatant magnetic pump. The first precipitate in the alkalization tank and the first precipitate generated from the secondary settling of the first supernatant are both pumped to a sedimentation storage tank via a pneumatic pump, and then pumped to a filter press for filtration. The filtrate (first filtrate) generated by filtration is received in a filtrate tank and then pumped to a uranium wastewater receiving tank. The filter cake (first target dissolved precipitate) generated by filtration is collected as temporary nuclear material. The first filtrate and the first supernatant are mixed and then pumped to an acidification tank. 10% H2SO4 is added to the acidification tank to adjust the pH to a first preset value so that CO32-... 2 - Under acidic conditions, decomposition yields the second treated wastewater; the second treated wastewater is introduced into the second alkalization tank, and 30% NaOH is added to adjust the pH to the second preset value to obtain the third treated wastewater; the wastewater after acidification and alkalization (the third treated wastewater) enters the flocculation tank, where 38% FeCl3, a demulsifier, and a coagulant aid PAM are added. Fe(OH)3 colloids generated by FeCl3 hydrolysis adsorb suspended impurities in the wastewater, forming flocs. The demulsifier breaks down the water-in-oil or water-in-oil structure formed by the water-oil mixture in the wastewater, causing oily substances in the solution to co-precipitate with the flocs; the coagulant aid PAM causes the tiny flocs in the wastewater to continuously aggregate into large flocs. After flocculation and sedimentation, the wastewater... The purpose of solid-liquid separation is to obtain a second supernatant and a second precipitate. The second precipitate is then subjected to pressure filtration to obtain a second filtrate and a second target precipitate. The second supernatant and the second filtrate are mixed and passed into a multi-media filter tower, where small particulate impurities in the wastewater are adsorbed and filtered by quartz sand of different particle sizes. The wastewater after treatment in the multi-media filter tower is then passed into an oil removal resin tower. In the oil removal resin tower, the oil in the wastewater is separated, emulsified, and dissolved. The oil is adsorbed and intercepted on the surface of the oil removal resin. When the oil collected in the oil removal resin reaches saturation, it is impacted by the water flow, and the enriched oil falls off the resin surface in the form of large oil droplets, flowing out from the overflow port of the oil removal resin tower. The waste liquid (target solution) after treatment in the oil removal resin tower is discharged from the outlet of the oil removal resin tower.

[0066] The method for treating alkaline uranium- and fluorine-containing wastewater described in this invention employs a treatment approach of "alkali precipitation + acidification + alkalization + multi-media filtration tower + oil removal resin tower." This method reduces the uranium content in uranium-purification and conversion wastewater to below 5 mg / L, COD ≤ 40 mg / L, and turbidity ≤ 5 NTU. Furthermore, this method boasts high treatment efficiency, can treat large quantities of alkaline uranium- and fluorine-containing wastewater while ensuring treatment effectiveness, exhibits strong anti-interference capabilities, is easily achievable, and is simple to operate. It achieves rapid treatment of alkaline uranium- and fluorine-containing wastewater with high precision, resulting in low uranium content in the treated wastewater. Simultaneously, it improves the recovery rate of metallic uranium from the alkaline uranium- and fluorine-containing wastewater, preventing the loss of nuclear materials.

[0067] like Figure 3 As shown, an embodiment of the present invention also provides a treatment device 20 for alkaline uranium- and fluorine-containing waste liquid, comprising:

[0068] Acquisition module 21 is used to acquire the first alkaline uranium- and fluorine-containing waste liquid to be treated;

[0069] The processing module 22 is used to perform alkaline precipitation treatment on the first waste liquid to be treated to obtain a first treated waste liquid and a first target precipitate; adjust the pH of the first treated waste liquid to a first preset value to obtain a second treated waste liquid; perform alkalization treatment on the second treated waste liquid to obtain a third treated waste liquid; and perform pretreatment on the third treated waste liquid to obtain a target solution and a second target precipitate.

[0070] Optionally, the first waste liquid to be treated is subjected to alkaline precipitation treatment to obtain a first waste liquid and a first target precipitate, including:

[0071] The pH of the first waste liquid to be treated is adjusted to a second preset value to obtain the second waste liquid to be treated;

[0072] The second waste liquid to be treated was subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a first supernatant and a first precipitate;

[0073] The first precipitate is subjected to pressure filtration to obtain the first target precipitate and the first filtrate;

[0074] The first filtrate and the first supernatant are mixed to form the first waste liquid.

[0075] Optionally, adjusting the pH of the first waste liquid to be treated to a second preset value to obtain a second waste liquid to be treated includes:

[0076] The pH of the first waste liquid to be treated is adjusted to a second preset value by using a sodium hydroxide solution of a first preset concentration, thereby obtaining a second waste liquid to be treated. The value of the second preset value ranges from 9 to 11.

[0077] Optionally, the pH of the first treated waste liquid is adjusted to a first preset value to obtain a second treated waste liquid, including:

[0078] The pH of the first treated waste liquid is adjusted to a first preset value by using sulfuric acid of a second preset concentration. The first preset value ranges from 3 to 5.

[0079] Optionally, the second waste liquid is subjected to alkalization treatment to obtain a third waste liquid, including:

[0080] The pH of the second treated waste liquid is adjusted to a third preset value by using a sodium hydroxide solution of a third preset concentration, thereby obtaining a third treated waste liquid. The value of the third preset value ranges from 9 to 11.

[0081] Optionally, the third waste liquid is pretreated to obtain the target solution and the second target precipitate, including:

[0082] The third waste liquid is subjected to flocculation and sedimentation treatment to obtain the fourth waste liquid and the second target precipitate;

[0083] The fourth waste liquid is subjected to multi-media filtration to obtain the fifth waste liquid;

[0084] The fifth waste liquid is subjected to oil removal treatment to obtain the target solution.

[0085] Optionally, the third wastewater is subjected to flocculation and sedimentation treatment to obtain a fourth wastewater and a second target precipitate; including:

[0086] The third treatment waste liquid is subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a second supernatant and a second precipitate;

[0087] The second precipitate is subjected to pressure filtration to obtain a second target precipitate and a second filtrate;

[0088] The second filtrate and the second supernatant are mixed to form the fourth waste liquid.

[0089] It should be noted that this device corresponds to the above-mentioned method for treating alkaline uranium- and fluorine-containing waste liquid. All implementation methods described above are applicable to the embodiments of this device and can achieve the same technical effect.

[0090] Embodiments of the present invention also provide a computing device, including: a processor and a memory storing a computer program, wherein the computer program, when executed by the processor, performs the above-described method for treating alkaline uranium- and fluorine-containing waste liquid. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0091] Embodiments of the present invention also provide a computer-readable storage medium, comprising: stored instructions, which, when executed on a computer, cause the computer to perform the above-described method for treating alkaline uranium- and fluorine-containing waste liquid. All implementations in the above method embodiments are applicable to this embodiment and can achieve the same technical effects.

[0092] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementations should not be considered beyond the scope of this invention.

[0093] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0094] In the embodiments provided by this invention, it should be understood that the disclosed apparatus and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative. For instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between devices or units may be electrical, mechanical, or other forms.

[0095] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0096] In addition, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0097] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, ROM, RAM, magnetic disks, or optical disks.

[0098] Furthermore, it should be noted that in the apparatus and method of the present invention, it is obvious that the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered equivalent solutions of the present invention. Moreover, the steps performing the above-described series of processes can naturally be executed in the order described, but are not necessarily required to be executed in chronological order; some steps can be executed in parallel or independently of each other. Those skilled in the art will understand that all or any step or component of the method and apparatus of the present invention can be implemented in any computing device (including processors, storage media, etc.) or network of computing devices, in hardware, firmware, software, or a combination thereof. This is something that those skilled in the art can achieve by using their basic programming skills after reading the description of the present invention.

[0099] Therefore, the object of the present invention can also be achieved by running a program or a set of programs on any computing device. The computing device can be a known general-purpose device. Therefore, the object of the present invention can also be achieved simply by providing a program product containing program code implementing the method or apparatus. That is, such a program product also constitutes the present invention, and the storage medium storing such a program product also constitutes the present invention. Obviously, the storage medium can be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present invention, it is obvious that the components or steps can be decomposed and / or recombined. These decompositions and / or recombinations should be considered equivalent to the present invention. Furthermore, the steps performing the above series of processes can naturally be performed in the order described, but are not necessarily required to be performed in chronological order. Some steps can be performed in parallel or independently of each other.

[0100] 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 method for treating alkaline uranium- and fluorine-containing waste liquid, characterized in that, include: Obtain an alkaline uranium- and fluorine-containing first waste liquid to be treated; the first waste liquid to be treated is an alkaline solution containing uranium and fluorine from the exhaust purification center; The first waste liquid to be treated is subjected to alkaline precipitation treatment to obtain the first waste liquid and the first target precipitate; The pH of the first treated waste liquid is adjusted to a first preset value to obtain the second treated waste liquid; The second waste liquid is subjected to alkalization treatment to obtain the third waste liquid; The third waste liquid is pretreated to obtain a target solution and a second target precipitate; both the first target precipitate and the second target precipitate are sodium diuranate. The process includes performing alkaline precipitation treatment on the first waste liquid to be treated to obtain a first treated waste liquid and a first target precipitate, including: The pH of the first waste liquid to be treated is adjusted to a second preset value to obtain the second waste liquid to be treated; The second waste liquid to be treated was subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a first supernatant and a first precipitate; The first precipitate is subjected to pressure filtration to obtain the first target precipitate and the first filtrate; The first filtrate and the first supernatant are mixed to form the first waste liquid. The process of adjusting the pH of the first treated waste liquid to a first preset value to obtain the second treated waste liquid includes: The pH of the first treated waste liquid is adjusted to a first preset value by using sulfuric acid of a second preset concentration, wherein the first preset value ranges from 3 to 5; the second preset concentration of sulfuric acid is 10% sulfuric acid; The process involves alkalizing the second waste liquid to obtain a third waste liquid, including: The pH of the second treated waste liquid is adjusted to a third preset value by using a sodium hydroxide solution of a third preset concentration to obtain a third treated waste liquid. The value of the third preset value ranges from 9 to 11. The sodium hydroxide solution of the third preset concentration is a 30% sodium hydroxide solution. Pretreatment of the third waste liquid to obtain the target solution and the second target precipitate includes: The process involves treating the third wastewater with flocculation and sedimentation to obtain a fourth wastewater and a second target precipitate. This includes: introducing the third wastewater into a flocculation tank and adding a demulsifier and 38% ferric chloride to the tank. The ferric hydroxide colloids produced after the hydrolysis of ferric chloride react with other colloidal particles in the water through adsorption and surface contact to form flocs. During the flocculation and sedimentation process, polyacrylamide, a coagulant aid, is added to the third wastewater to aggregate small flocs into large flocs, accelerating the flocculation and sedimentation process and speeding up the formation of the second precipitate. The second supernatant and the second precipitate are then rapidly obtained through flocculation and sedimentation. The second precipitate is then subjected to pressure filtration to obtain the second target precipitate and the second filtrate. The second filtrate and the second supernatant are then mixed to form the fourth wastewater. The fourth waste liquid is subjected to multi-media filtration to obtain the fifth waste liquid; The fifth waste liquid is subjected to oil removal treatment to obtain the target solution.

2. The method for treating alkaline uranium- and fluorine-containing waste liquid according to claim 1, characterized in that, Adjusting the pH of the first waste liquid to be treated to a second preset value to obtain a second waste liquid to be treated includes: The pH of the first waste liquid to be treated is adjusted to a second preset value by using a sodium hydroxide solution of a first preset concentration, thereby obtaining a second waste liquid to be treated. The value of the second preset value ranges from 9 to 11.

3. The method for treating alkaline uranium- and fluorine-containing waste liquid according to claim 1, characterized in that, The third wastewater is subjected to flocculation and sedimentation treatment to obtain a fourth wastewater and a second target precipitate; including: The third treatment waste liquid is subjected to sedimentation treatment with ferric chloride and demulsifier to obtain a second supernatant and a second precipitate; The second precipitate is subjected to pressure filtration to obtain a second target precipitate and a second filtrate; The second filtrate and the second supernatant are mixed to form the fourth waste liquid.

4. A treatment device for alkaline uranium- and fluorine-containing waste liquid, characterized in that, include: The acquisition module is used to acquire the first alkaline uranium- and fluorine-containing waste liquid to be treated. The first waste liquid to be treated is an alkaline solution containing uranium and fluorine from the exhaust purification center; The processing module is used to perform alkaline precipitation treatment on the first waste liquid to be treated to obtain a first treated waste liquid and a first target precipitate; adjust the pH of the first treated waste liquid to a first preset value to obtain a second treated waste liquid; perform alkalization treatment on the second treated waste liquid to obtain a third treated waste liquid; and pretreat the third treated waste liquid to obtain a target solution and a second target precipitate; both the first target precipitate and the second target precipitate are sodium diuranate; wherein, performing alkaline precipitation treatment on the first waste liquid to be treated to obtain the first treated waste liquid and the first target precipitate includes: adjusting the pH of the first waste liquid to be treated to a second preset value to obtain a second waste liquid; and so on. The second waste liquid to be treated is subjected to sedimentation treatment with ferric chloride and a demulsifier to obtain a first supernatant and a first precipitate; the first precipitate is subjected to pressure filtration treatment to obtain a first target precipitate and a first filtrate; the first filtrate and the first supernatant are mixed to form a first treated waste liquid; wherein, the pH of the first treated waste liquid is adjusted to a first preset value to obtain a second treated waste liquid, including: adjusting the pH of the first treated waste liquid to a first preset value with sulfuric acid of a second preset concentration, wherein the first preset value ranges from 3 to 5; the second preset concentration of sulfuric acid is 10% sulfuric acid; wherein, the second treated waste liquid is subjected to alkalization treatment to obtain a third treated waste liquid. The process includes: adjusting the pH of the second treated waste liquid to a third preset value using a sodium hydroxide solution of a third preset concentration, resulting in a third treated waste liquid, wherein the third preset value ranges from 9 to 11; the third preset concentration sodium hydroxide solution is a 30% sodium hydroxide solution; pretreating the third treated waste liquid to obtain a target solution and a second target precipitate, including: performing flocculation and sedimentation treatment on the third treated waste liquid to obtain a fourth treated waste liquid and a second target precipitate, including: introducing the third treated waste liquid into a flocculation tank, and adding a demulsifier and 38% ferric chloride to the flocculation tank; the ferric hydroxide colloid produced after the hydrolysis of ferric chloride utilizes adsorption and surface... The contact reaction with other colloidal particles in the water forms flocs. During the flocculation and sedimentation process, the addition of coagulant polyacrylamide to the third wastewater causes small flocs to aggregate into large flocs, accelerating the flocculation and sedimentation efficiency and speeding up the formation of the second precipitate. The second supernatant and the second precipitate are quickly obtained through flocculation and sedimentation. The second precipitate is then subjected to pressure filtration to obtain the second target precipitate and the second filtrate. The second filtrate and the second supernatant are mixed to form the fourth wastewater. The fourth wastewater is then subjected to multi-media filtration to obtain the fifth wastewater. The fifth wastewater is then subjected to oil removal treatment to obtain the target solution.

5. A computing device, characterized in that, include: A processor, a memory storing a computer program, wherein the computer program, when executed by the processor, performs the method as described in any one of claims 1 to 3.

6. A computer-readable storage medium, characterized in that, include: A storage instruction that, when executed on a computer, causes the computer to perform the method as described in any one of claims 1 to 3.

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