Nuclear-grade mixed bed resin impurity removal method

Abstract

The invention provides a nuclear-grade mixed bed resin impurity removal method. The method comprises the following steps: introducing a cleaning solution and any one of cation exchange resin and anion exchange resin into a cleaning tank; vortex of the cleaning liquid is generated in the cleaning tank so as to remove impurities, and a first purified product is obtained; detecting the impurity concentration of the first product by adopting a photoresist method, comparing the impurity concentration with a first pre-stored threshold value, and transferring the first product in the cleaning tank to a storage tank when the impurity concentration of the first product is smaller than the first pre-stored threshold value; introducing the other one of the cation exchange resin and the anion exchange resin into a cleaning tank; vortex of the cleaning liquid is generated in the cleaning tank again to remove impurities, and a purified second product is obtained; detecting the impurity concentration of the second product based on a photoresist method, and comparing the impurity concentration with a second pre-stored threshold value, so as to transfer the first product in the storage tank to a cleaning tank when the impurity concentration of the second product is smaller than the second pre-stored threshold value; and aggregating the first product and the second product in the cleaning tank to obtain the target resin.

Description

Technical Field

[0001] The present application belongs to the technical field of nuclear-grade water treatment, and specifically relates to a nuclear-grade mixed-bed resin impurity removal method. Background Art

[0002] In the nuclear industry, the treatment of nuclear-grade water is of vital importance. Nuclear-grade water usually needs to meet extremely high purity standards to ensure the safe operation of nuclear reactors and prevent the leakage of radioactive materials. Nuclear-grade mixed bed resins are widely used as important water treatment materials for nuclear-grade water purification. However, in order to improve the treatment effect of nuclear-grade water, nuclear-grade mixed bed resins need to be impurity-removed. At present, nuclear-grade mixed bed resins mainly rely on manual visual inspection to judge the impurity removal effect after impurities are removed. This method has obvious disadvantages. First, the accuracy and reliability of manual visual inspection are relatively limited. Different people may have different judgment criteria for the impurity removal effect, and human vision is easily affected by subjective factors, such as fatigue status, light conditions, etc., which may lead to deviations in the evaluation of the impurity removal effect. Even experienced operators can hardly ensure consistency and accuracy in every judgment. Second, manual visual inspection is inefficient. In the large-scale nuclear-grade water purification process, a large number of nuclear-grade mixed bed resins will be involved. If the impurity removal effect is judged by manual visual inspection one by one, it will not only take a lot of time and manpower costs, but also fail to meet the needs of efficient production. Moreover, manual operation is relatively slow, which may have an adverse impact on the progress of the entire nuclear-grade water purification process. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present application is to provide a nuclear-grade mixed-bed resin impurity removal method that can accurately and efficiently judge the impurity removal effect and overcome the disadvantages of manual visual judgment.

[0004] In order to solve the above problems, the present application provides a nuclear grade mixed bed resin impurity removal method, comprising:

[0005] introducing a cleaning solution and either a cation exchange resin or an anion exchange resin into a cleaning tank;

[0006] generating a vortex of the cleaning liquid in the cleaning tank, removing impurities through the vortex to obtain a purified first product;

[0007] Using a light resistance method to detect the impurity concentration of the first product, and comparing it with a first pre-stored threshold value, when the impurity concentration of the first product is less than the first pre-stored threshold value, transferring the first product in the cleaning tank to a storage tank;

[0008] introducing the other of the cation exchange resin and the anion exchange resin into the cleaning tank;

[0009] generating a vortex of the cleaning liquid in the cleaning tank again to remove impurities and obtain a purified second product;

[0010] Detecting the impurity concentration of the second product based on the light resistance method and comparing it with a second pre-stored threshold value, and when the impurity concentration of the second product is less than the second pre-stored threshold value, transferring the first product in the storage tank to the cleaning tank;

[0011] The first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain a target resin.

[0012] Optionally, the first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain a target resin, comprising:

[0013] The clustering rate of the first product and the second product is detected based on the light obstruction method and compared with a third pre-stored threshold value. When the clustering rate of the first product and the second product is less than the third pre-stored threshold value, the cleaning liquid in the cleaning tank is adjusted to be alkaline.

[0014] Optionally, the step of adjusting the cleaning liquid in the cleaning tank to be alkaline comprises:

[0015] A strong base is added to the cleaning solution in the cleaning tank.

[0016] Optionally, the light blocking method is to allow light to pass through the first product and the second product to be detected, measure the intensity of the transmitted light and the angle and intensity of the heat dissipation light, so as to determine the impurity concentration and the clustering rate in the first product and the second product.

[0017] Optionally, the cleaning tank is connected to the storage tank, and a delivery pump is provided on the connecting pipeline between the cleaning tank and the storage tank, and the delivery pump is used to transport the first product.

[0018] Optionally, the delivery pump is a vacuum diaphragm pump.

[0019] Optionally, a solenoid valve is further provided on the connecting pipeline between the cleaning tank and the storage pipe, and the solenoid valve is used to control the on-off state of the connecting pipeline between the cleaning tank and the storage pipe.

[0020] Optionally, after the first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain a target resin, the method further comprises:

[0021] The target resin in the cleaning tank is transferred to the storage tank.

[0022] Optionally, after transferring the target resin in the cleaning tank to the storage tank, the method further includes:

[0023] The cleaning liquid in the storage tank is discharged until the volume ratio of the target resin to the cleaning liquid in the storage tank is within a preset setting range.

[0024] Optionally, the cleaning solution is deionized water.

[0025] Beneficial Effects

[0026] A nuclear-grade mixed bed resin impurity removal method provided in an embodiment of the present invention detects impurity concentration by a light-blocking method, which is more accurate and reliable than manual visual inspection, avoids the influence of subjective factors, and ensures the consistency and accuracy of the evaluation of impurity removal effect. At the same time, the detection efficiency is improved, and it can quickly determine whether the impurity concentration of the product meets the standard. Especially in large-scale nuclear-grade water purification, it can save a lot of time and labor costs, meet the needs of efficient production, and avoid affecting the progress of the nuclear-grade water purification process due to slow manual operation. In addition, by treating the cation and anion exchange resins in steps and performing group treatment, the impurity removal effect of the nuclear-grade mixed bed resin can be effectively improved, providing high-quality water treatment materials for nuclear-grade water purification, ensuring the safe operation of nuclear reactors, and preventing the leakage of radioactive substances. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a flow chart of a method for removing impurities from a nuclear-grade mixed-bed resin according to an optional embodiment of the present application. DETAILED DESCRIPTION

[0028] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the accompanying drawings, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present application and to fully convey the scope of the present application to those skilled in the art.

[0029] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present application and are not used to limit the present application.

[0030] See also Figure 1 As shown, according to an embodiment of the present application, a nuclear-grade mixed bed resin impurity removal method is provided, which is applied to an impurity removal device, the impurity removal device includes a cleaning tank, a stirring device, a particle detection device and a storage tank, the stirring device and the particle detection device are arranged in the cleaning tank, the storage tank is connected to the cleaning tank, and a delivery pump is arranged on the connecting pipeline between the storage tank and the cleaning tank.

[0031] Among them, the impurity removal device can be a resin particle impurity removal device. As the core place for resin impurity removal, the cleaning tank carries the main operating space of the entire impurity removal process. The stirring device is a key device for separating impurities from resin particles. Through the eddy current effect it generates, it effectively promotes the separation process of impurities and resin particles. The particle detection equipment plays a decisive role in judging the effect of impurity removal. With its precise detection means, it can accurately judge whether the impurity removal meets the requirements. The storage tank is a container for temporarily storing products that have reached specific impurity removal standards, providing necessary buffering and preparation for subsequent processing steps. The delivery pump is a device that plays a key role in the circulation of resin particles, ensuring that the resin particles can be efficiently and stably transported between different links.

[0032] Nuclear grade mixed bed resin impurity removal methods include:

[0033] Step S1: introducing a cleaning solution and either a cation exchange resin or an anion exchange resin into a cleaning tank.

[0034] In the process of removing impurities from the nuclear grade mixed bed resin, step S1 is first performed to prepare for the subsequent impurity removal operation.

[0035] Specifically, the cleaning liquid is introduced into the cleaning tank. The cleaning liquid can be a specific solution designed specifically for nuclear-grade mixed bed resins, and its function is to remove impurities by interacting with the resin. At the same time, one of the cation exchange resins and anion exchange resins is selected and introduced into the cleaning tank. Cation exchange resins are mainly used to remove cationic impurities in water, while anion exchange resins are mainly used to remove anionic impurities. The reason for selecting one of the resins to be introduced into the cleaning tank in this step is to first perform a separate impurity removal treatment on it. This order of operation helps to remove impurities in different types of resins in a staged and targeted manner, and improve the efficiency and effect of impurity removal. After being introduced into the cleaning tank, the cleaning liquid and the selected resin are mixed in the tank to prepare for the subsequent impurity removal by generating a vortex through a stirring device.

[0036] Step S2: generating a vortex of the cleaning liquid in the cleaning tank, removing impurities through the vortex to obtain a purified first product.

[0037] Among them, the generation of eddy current can be achieved by a stirring device provided in the cleaning tank. The stirring device operates in a specific manner so that the cleaning liquid forms a rapidly rotating flow state in the cleaning tank, i.e., an eddy current. Under the action of the eddy current, the cleaning liquid and the resin particles are fully mixed and in a dynamic state. Due to the difference in physical properties between impurities and resin particles, the strong shear force and centrifugal force generated by the eddy current can promote the separation of impurities from the resin particles. Impurities may be gradually taken away from the resin particles under the action of the eddy current due to their light weight and small size, while the resin particles are relatively stably located in a specific position in the eddy current. Afterwards, after a period of eddy current impurity removal process, impurities in the mixture in the cleaning tank are largely removed, and the purified product obtained at this time is the first product. This first product is a resin after preliminary impurity removal treatment, and its impurity content is greatly reduced compared to before treatment, which lays the foundation for subsequent further detection and treatment steps.

[0038] Specifically, after the vortex impurity removal, since the impurities are lighter than the resin, under the continuous action of the vortex, the impurities will naturally move to a specific position in the cleaning tank, that is, the upper area, and gradually gather. A specific discharge port or channel can be set on the upper part of the cleaning tank. When the impurities gather to a certain extent, by opening these discharge ports or channels, the impurities are discharged from the cleaning tank in an overflow manner by utilizing the flow of the cleaning liquid. It can be understood that this overflow method utilizes the level difference and flow power of the cleaning liquid in the cleaning tank. When the liquid level of the cleaning liquid reaches the height of the discharge port, since the impurities are concentrated near the liquid surface, the flow of the cleaning liquid will drive the impurities to flow out of the discharge port together. Further, in order to ensure that the resin particles are not accidentally brought out during the overflow process, the design of the discharge port can consider using an appropriate filtering structure or a device for controlling the flow rate. This can not only ensure that the impurities can be discharged smoothly, but also prevent the loss of resin particles, thereby achieving efficient cleaning of the impurities in the cleaning tank and providing a purer first product for subsequent processing steps.

[0039] It should be noted that the first product is a mixture consisting of resin particles and impurities.

[0040] Step S3: using a light resistance method to detect the impurity concentration of the first product, and comparing it with a first pre-stored threshold value, when the impurity concentration of the first product is less than the first pre-stored threshold value, transferring the first product in the cleaning tank to a storage tank.

[0041] The light blocking method is to allow light to pass through the first product to be detected, measure the intensity of the transmitted light and the angle and intensity of the scattered light, and thus determine the impurity concentration in the first product.

[0042] Specifically, when light passes through the first product, due to the presence of impurities in the first product, these impurities will have different degrees of influence on the light. On the one hand, part of the light will directly pass through the first product, and the intensity of the transmitted light will be weakened due to the absorption, blocking and other effects of impurities. The more impurities there are, the stronger the blocking and absorption of light may be, and the lower the intensity of the transmitted light will be. On the other hand, impurities will also cause light to scatter. The angle and intensity of scattered light are closely related to factors such as the size, shape, and concentration of impurities. By measuring the angle and intensity of scattered light, information about the characteristics of impurities can be obtained. By combining parameters such as the intensity of transmitted light and the angle and intensity of scattered light, using specific algorithms and models, the concentration of impurities in the first product can be determined, so that the impurities in the first product can be quantitatively analyzed, providing an important basis for judging the purity of the first product and subsequent processing.

[0043] In this embodiment, the light blocking method is implemented by a particle detection device set in the cleaning tank. The particle detection device may include components such as a light source and a light sensor. When the light source emits a light of a specific wavelength to illuminate the first product in the cleaning tank, the light signal received by the light sensor changes due to the impurities in the first product scattering, blocking, etc. on the light. By analyzing and processing the light signal, the impurity concentration in the first product can be calculated. Further, a first pre-stored threshold is pre-set, and the first pre-stored threshold is used to characterize the upper limit of the acceptable impurity concentration of the first product. The impurity concentration of the first product detected is compared with the first pre-stored threshold. If the impurity concentration of the first product is less than the first pre-stored threshold, it means that the purity of the first product has reached a certain requirement at this time. In this case, the delivery pump set on the connecting pipeline between the cleaning tank and the storage tank is started to perform a transfer operation, and the first product in the cleaning tank is transferred to the storage tank for temporary storage. The function of the storage tank is to provide an intermediate storage place for subsequent processing steps to ensure that the first product can be safely stored after reaching a specific standard so as to carry out the next step of processing.

[0044] It should be noted that the light obstruction method is more accurate and objective than traditional methods such as manual visual inspection to detect the impurity concentration of the first product. The light obstruction method can accurately measure the impact of impurities on specific light, thereby obtaining a more accurate value of impurity concentration, avoiding errors caused by subjective factors in manual visual inspection. By comparing with the first pre-stored threshold, it can be clearly judged whether the impurity content of the first product meets the requirements, ensuring the reliability of the impurity removal effect. At the same time, when the impurity concentration of the first product is less than the first pre-stored threshold, the first product in the cleaning tank is automatically transferred to the storage tank, realizing the automatic control of the impurity removal process. This process does not require manual intervention, which not only improves work efficiency, but also reduces the occurrence of human errors. In large-scale nuclear-grade mixed bed resin impurity removal, the first product that meets the requirements can be quickly and accurately transferred and stored, which provides convenience for subsequent processing steps and meets the needs of efficient production.

[0045] Step S4: Introducing the other of the cation exchange resin and the anion exchange resin into a cleaning tank.

[0046] In the process of removing impurities from the nuclear-grade mixed bed resin, after the impurities of one of the cation exchange resin and the anion exchange resin are removed and the first product is obtained and meets the corresponding impurity concentration requirements, step S4 is performed.

[0047] Specifically, the other of the cation exchange resin and the anion exchange resin is introduced into the cleaning tank, which means that if the cation exchange resin was previously processed, the anion exchange resin is now introduced into the cleaning tank; conversely, if the anion exchange resin was previously processed, the cation exchange resin is now introduced into the cleaning tank. The purpose is to perform a separate impurity removal treatment on the other resin, similar to the previous treatment steps, to prepare for the subsequent purified second product, and to ensure that high-quality nuclear-grade mixed bed resins are finally obtained by treating different types of resins in stages to meet the strict requirements of nuclear-grade water purification.

[0048] Step S5: generating a vortex of the cleaning liquid in the cleaning tank again to remove impurities and obtain a purified second product.

[0049] After the other of the cation exchange resin and the anion exchange resin is introduced into the cleaning tank, a vortex of the cleaning liquid needs to be generated again in the cleaning tank. This step is similar to the treatment of the first product, and its purpose is to use the strong force of the vortex to remove impurities in the newly introduced resin, thereby obtaining a purified second product.

[0050] Specifically, the generation of eddy currents can also be achieved by a stirring device in the cleaning tank. The stirring device operates in a specific manner so that the cleaning liquid rotates and flows at a high speed in the cleaning tank to form a eddy current. Under the action of the eddy current, the cleaning liquid is fully mixed with the newly introduced resin and is in a dynamic state. Due to the difference in physical properties between impurities and resin particles, the shear force and centrifugal force generated by the eddy current can promote the separation of impurities from resin particles. Impurities may be gradually taken away from the resin particles under the action of the eddy current due to their light weight and small size, while the resin particles are relatively stable in a specific position in the eddy current. After a period of eddy current impurity removal process, the impurities in the newly introduced resin in the cleaning tank are largely removed, and the product obtained at this time is the purified second product. This second product is the result of impurity removal treatment of another resin, and its impurity content is greatly reduced compared to before treatment, which is ready for subsequent detection and further treatment.

[0051] Step S6: Detect the impurity concentration of the second product based on the light resistance method and compare it with the second pre-stored threshold value. When the impurity concentration of the second product is less than the second pre-stored threshold value, transfer the first product in the storage tank to the cleaning tank.

[0052] Among them, the impurity concentration of the second product is detected by the same light obstruction method as that for detecting the impurity concentration of the first product. The light obstruction method determines the impurity concentration in the second product by allowing light to pass through the second product and measuring parameters such as the intensity of the transmitted light and the angle and intensity of the scattered light. Then, the detected impurity concentration of the second product is compared with the pre-set second pre-stored threshold. The second pre-stored threshold is used to characterize the upper limit of the acceptable impurity concentration of the second product. If the impurity concentration of the second product is less than the second pre-stored threshold, it means that the purity of the second product has reached a certain requirement at this time. In this case, the transfer pump provided on the connecting pipeline between the storage tank and the cleaning tank is turned on to perform a transfer operation to transfer the first product in the storage tank to the cleaning tank. This is because the first product has been subjected to impurity removal treatment and temporarily stored in the storage tank. When the second product also meets the impurity concentration requirements, the two need to be subjected to the next step of grouping treatment in the cleaning tank, so the first product is transferred back to the cleaning tank to prepare for the subsequent grouping operation.

[0053] Step S7: agglomerating the first product and the second product in a cleaning tank to obtain a target resin.

[0054] Among them, when the first product and the second product both meet their respective impurity concentration requirements and are transported to the cleaning tank, the first product and the second product are subjected to agglomeration treatment in the cleaning tank. Agglomeration treatment refers to making the first product and the second product combine and aggregate together under specific conditions. This may be achieved by adjusting the environmental conditions in the cleaning tank, such as temperature, pressure, stirring intensity, etc., to promote the close combination of resin particles in the two products. During the agglomeration process, the cation exchange resin and the anion exchange resin each exert their ion exchange characteristics to form a more stable and efficient mixed resin structure. After the agglomeration treatment, the obtained product is the target resin. This target resin is a high-quality nuclear-grade mixed bed resin obtained after a series of impurity removal and treatment steps. It can meet the strict requirements of nuclear-grade water purification on resin performance, effectively remove impurity ions in water, and ensure the purity and safety of nuclear-grade water in the nuclear industry.

[0055] In the present application, first, the cleaning liquid and any one of the cation exchange resin and the anion exchange resin are introduced into the cleaning tank; then, a vortex of the cleaning liquid is generated in the cleaning tank, and impurities are removed by the vortex to obtain the purified first product; then, the impurity concentration of the first product is detected by the light resistance method, and the detection result is compared with the first pre-stored threshold value. When the impurity concentration of the first product is less than the first pre-stored threshold value, the first product in the cleaning tank is transported to the storage tank; thereafter, the other of the cation exchange resin and the anion exchange resin is introduced into the cleaning tank; the vortex of the cleaning liquid is generated in the cleaning tank again to remove impurities to obtain the purified second product; the impurity concentration of the second product is also detected based on the light resistance method, and compared with the second pre-stored threshold value. When the impurity concentration of the second product is less than the second pre-stored threshold value, the first product in the storage tank is transported to the cleaning tank; finally, the first product and the second product are subjected to a grouping process to obtain the target resin. It can be understood that the detection of impurity concentration by the light resistance method is more accurate and reliable than manual visual inspection, avoiding the influence of subjective factors, and ensuring the consistency and accuracy of the evaluation of impurity removal effect. At the same time, the detection efficiency is improved, and it can quickly determine whether the impurity concentration of the product meets the standard. Especially in large-scale nuclear-grade water purification, it can save a lot of time and labor costs, meet the needs of efficient production, and avoid affecting the progress of the nuclear-grade water purification process due to slow manual operation. In addition, by treating the cation and anion exchange resins in steps and performing group treatment, the impurity removal effect of the nuclear-grade mixed bed resin can be effectively improved, providing high-quality water treatment materials for nuclear-grade water purification, ensuring the safe operation of nuclear reactors, and preventing the leakage of radioactive substances.

[0056] In some possible embodiments disclosed in this application, step S7 includes:

[0057] Step S701: detecting the agglomeration rate of the first product and the second product based on the light resistance method, and comparing it with the third pre-stored threshold value; when the agglomeration rate of the first product and the second product is less than the third pre-stored threshold value, adjusting the cleaning liquid in the cleaning tank to be alkaline.

[0058] Among them, after the first product and the second product are subjected to the agglomeration treatment, the light blocking method is used again to detect the agglomeration rate of the first product and the second product. The light blocking method determines the agglomeration rate of the two by measuring the changes in parameters such as the intensity of transmitted light, the angle and intensity of scattered light caused by different agglomeration states when the light passes through the mixture of the first product and the second product. Then, the detected agglomeration rate is compared with the preset third pre-stored threshold. The third pre-stored threshold is used to characterize the minimum standard of the desired agglomeration degree of the first product and the second product. If the agglomeration rate of the first product and the second product is less than the third pre-stored threshold, it means that the agglomeration degree of the two does not meet the requirements at this time. In this case, the cleaning liquid in the cleaning tank is adjusted to be alkaline. This is because under a specific alkaline environment, the interaction between the cation exchange resin and the anion exchange resin may be promoted to enhance their agglomeration effect. By changing the pH of the cleaning liquid, the chemical environment of the resin particles can be adjusted, thereby improving the agglomeration state, so as to achieve the purpose of increasing the agglomeration rate and meeting the target requirements.

[0059] It is understandable that in the present application, the agglomeration rate of the first product and the second product is detected by the light obstruction method, and the degree of combination of the two can be accurately quantified. Comparing with the third pre-stored threshold value makes the judgment of the agglomeration state more objective and accurate, avoiding the error that may be caused by relying on subjective experience judgment. In this way, it can be ensured that in the impurity removal process, the target resin finally obtained has an ideal agglomeration structure, so as to better play its functions such as ion exchange. In addition, when the agglomeration rate is less than the third pre-stored threshold value, the cleaning liquid in the cleaning tank is adjusted to be alkaline, which provides an effective means for improving the agglomeration state. This adjustment method is flexible and can adjust the processing conditions in real time according to the actual test results to meet the impurity removal requirements of different batches of resins. In the impurity removal process of nuclear-grade mixed bed resin, dynamic adjustments can be made for various complex situations, which improves the adaptability and reliability of the impurity removal method. Further, adjusting the cleaning liquid to alkaline can promote the further combination of the first product and the second product and improve the agglomeration rate. A good agglomeration structure helps to improve the performance indicators such as stability, exchange capacity and service life of the target resin. In applications such as nuclear-grade water purification, it can more effectively remove impurity ions in water, ensure the safe operation of nuclear reactors and the high quality of nuclear-grade water, and provide more reliable water treatment solutions for the nuclear industry.

[0060] In the above embodiment, step S701 includes:

[0061] Step S7011: Add strong alkali to the cleaning liquid in the cleaning tank.

[0062] Among them, after determining that the clustering rate of the first product and the second product is less than the third pre-stored threshold, measures need to be taken to adjust the cleaning liquid in the cleaning tank to be alkaline. One specific operation method is to add a strong base to the cleaning liquid in the cleaning tank. Adding a strong base to the cleaning liquid will change the acidity and alkalinity of the cleaning liquid, increase the pH value, and thus become an alkaline environment.

[0063] Specifically, the strong base may be a sodium hydroxide solution with a concentration of 2%.

[0064] In some possible embodiments disclosed in the present application, after step S7, the nuclear grade mixed bed resin impurity removal method further includes:

[0065] Step S8: Transfer the target resin in the cleaning tank to a storage tank.

[0066] Among them, after a series of impurity removal and processing steps in the cleaning tank, the target resin that meets the requirements is obtained. At this time, the target resin needs to be transferred from the cleaning tank to the storage tank. The transfer operation is usually achieved through a specific conveying device, such as a conveying pump. These conveying devices can transport the target resin in the cleaning tank to the storage tank in a safe and stable manner.

[0067] It is understandable that the purpose of transferring the target resin to the storage tank is to temporarily store it for subsequent use or further processing. The storage tank provides a relatively stable storage environment for the target resin, protects its quality and performance, and is also convenient for taking the target resin at any time when needed.

[0068] In some possible embodiments disclosed in the present application, after step S8, the nuclear grade mixed bed resin impurity removal method further includes:

[0069] Step S9: draining the cleaning liquid in the storage tank until the volume ratio of the target resin to the cleaning liquid in the storage tank is within a preset setting range.

[0070] In addition to the target resin, a certain amount of cleaning liquid may remain in the storage tank. In order to meet specific subsequent processing requirements or ensure the purity of the target resin, the cleaning liquid in the storage tank needs to be discharged.

[0071] Specifically, the process of discharging the cleaning liquid is usually achieved through a discharge port or a discharge device provided on the storage tank. As the cleaning liquid is continuously discharged, the ratio of the target resin to the cleaning liquid in the storage tank will change. By continuously monitoring the volume ratio of the target resin to the cleaning liquid, when this ratio reaches the preset setting range, the cleaning liquid is stopped from being discharged. The preset setting range is determined according to the specific process requirements and the characteristics of the target resin. Its purpose is to ensure that the target resin is not affected by excessive cleaning liquid while ensuring that the target resin is in a more suitable state in the storage tank for the next step of processing or use. For example, if there is too much cleaning liquid, it may affect the performance of the target resin or increase the difficulty of subsequent processing; if there is too little cleaning liquid, it may cause the target resin to accumulate unevenly in the storage tank or be easily affected by external factors.

[0072] Furthermore, in order to ensure that the target resin is not accidentally carried out during the process of discharging the cleaning liquid, the discharge port or the discharge device may adopt an appropriate filtering structure or a device for controlling the flow rate.

[0073] In some possible embodiments disclosed in the present application, the cleaning liquid is deionized water.

[0074] Deionized water is water obtained by removing almost all ionic impurities in water through a specific treatment method. The ionic impurities mainly include cations such as sodium ions (Na + ), calcium ions (Ca 2+ ), magnesium ion (Mg 2+ ) and anions such as chloride ions (Cl - ), sulfate ion (SO4 2- )wait.

[0075] It is understandable that in the process of removing impurities from nuclear-grade mixed-bed resins, using deionized water as the cleaning liquid can avoid the introduction of new ionic impurities to the greatest extent, ensuring that the impurity content in the target resin will not increase due to the cleaning liquid itself during the cleaning and treatment process, thereby ensuring the purity of the target resin.

[0076] In some possible embodiments disclosed in the present application, the delivery pump provided on the connecting pipeline between the cleaning tank and the storage tank is a vacuum diaphragm pump.

[0077] It should be noted that the vacuum diaphragm pump can provide stable delivery pressure and flow to ensure smooth transfer of resin between the cleaning tank and the storage tank. This helps to avoid mechanical damage to the resin caused by pressure fluctuations or unstable flow, ensures the integrity of the resin particles, and is also conducive to accurately controlling the transfer process of the resin and improving the stability and reliability of the entire impurity removal process.

[0078] In some possible embodiments disclosed in the present application, a solenoid valve is further provided on the connecting pipeline between the cleaning tank and the storage tank.

[0079] It is understandable that the solenoid valve can achieve precise control of the fluid in the pipeline. In the process of nuclear-grade mixed bed resin impurity removal, the transfer of resin and cleaning fluid between the cleaning tank and the storage tank can be accurately controlled by controlling the opening and closing of the solenoid valve according to different process steps and requirements. For example, when the target resin in the cleaning tank needs to be transferred to the storage tank, opening the solenoid valve can ensure the smooth flow of the resin; when the transfer is not required, closing the solenoid valve can prevent accidental fluid flow and ensure the stability and safety of the process.

[0080] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0081] The above description is only the preferred embodiment of the present application and is not intended to limit the present invention. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for removing impurities from a nuclear grade mixed bed resin, characterized in that: include: introducing a cleaning solution and either a cation exchange resin or an anion exchange resin into a cleaning tank; generating a vortex of the cleaning liquid in the cleaning tank, removing impurities through the vortex to obtain a purified first product; Using a light resistance method to detect the impurity concentration of the first product, and comparing it with a first pre-stored threshold value, when the impurity concentration of the first product is less than the first pre-stored threshold value, transferring the first product in the cleaning tank to a storage tank; introducing the other of the cation exchange resin and the anion exchange resin into the cleaning tank; generating a vortex of the cleaning liquid in the cleaning tank again to remove impurities and obtain a purified second product; Detecting the impurity concentration of the second product based on the light resistance method and comparing it with a second pre-stored threshold value, and when the impurity concentration of the second product is less than the second pre-stored threshold value, transferring the first product in the storage tank to the cleaning tank; The first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain a target resin.

2. The method for removing impurities from a nuclear grade mixed bed resin according to claim 1, characterized in that: The first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain a target resin, comprising: The clustering rate of the first product and the second product is detected based on the light obstruction method and compared with a third pre-stored threshold value. When the clustering rate of the first product and the second product is less than the third pre-stored threshold value, the cleaning liquid in the cleaning tank is adjusted to be alkaline.

3. The method for removing impurities from a nuclear grade mixed bed resin according to claim 2, characterized in that: The step of adjusting the cleaning liquid in the cleaning tank to be alkaline comprises: A strong base is added to the cleaning solution in the cleaning tank.

4. The method for removing impurities from a nuclear grade mixed bed resin according to claim 1, characterized in that: The light blocking method is to allow light to pass through the first product and the second product to be detected, measure the intensity of the transmitted light and the angle and intensity of the heat dissipation light, and thus determine the impurity concentration and the clustering rate in the first product and the second product.

5. The method for removing impurities from a nuclear grade mixed bed resin according to claim 1, characterized in that: The cleaning tank is connected to the storage tank. A delivery pump is provided on the connecting pipeline between the cleaning tank and the storage tank. The delivery pump is used to transport the first product.

6. The method for removing impurities from a nuclear grade mixed bed resin according to claim 5, characterized in that: The delivery pump is a vacuum diaphragm pump.

7. The method for removing impurities from a nuclear grade mixed bed resin according to claim 5, characterized in that: A solenoid valve is also provided on the communication pipeline between the cleaning tank and the storage pipe, and the solenoid valve is used to control the on-off state of the communication pipeline between the cleaning tank and the storage pipe.

8. The method for removing impurities from a nuclear grade mixed bed resin according to claim 1, characterized in that: After the first product and the second product are subjected to agglomeration treatment in the cleaning tank to obtain the target resin, the method further includes: The target resin in the cleaning tank is transferred to the storage tank.

9. The method for removing impurities from a nuclear grade mixed bed resin according to claim 8, characterized in that: After transferring the target resin in the cleaning tank to the storage tank, the method further includes: The cleaning liquid in the storage tank is discharged until the volume ratio of the target resin to the cleaning liquid in the storage tank is within a preset setting range.

10. The method for removing impurities from a nuclear grade mixed bed resin according to claim 1, characterized in that: The cleaning solution is deionized water.

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