Feed solution delivery apparatus and high level feed solution treatment system

Abstract

The application discloses a kind of feed liquid conveying device and high feed liquid processing system, it is related to nuclear industry technical field.The feed liquid conveying device includes: feed tank, for loading target feed liquid;Buffer tank, with feed tank through first lifting pipeline communication;First air lifting device, set on first lifting pipeline;Measurement supply tank, with buffer tank through second lifting pipeline communication, its height is higher than the height of buffer tank;Second air lifting device, set on second lifting pipeline;Online measurement device, for measuring target feed liquid in measurement supply tank, its first end communicates measurement supply tank, the position of first end is lower than the lowest point of measurement supply tank, so that the first end of online measurement device and the outlet of measurement supply tank exist height difference.According to the embodiment of the application, the device can improve or solve the problem of difficult to tilt feeding of feed liquid conveying device.

Description

Technical Field

[0001] This application belongs to the field of nuclear industry technology, specifically relating to a liquid feed conveying device and a high-level release liquid treatment system. Background Technology

[0002] The materials involved in the radiochemical facilities of the nuclear industry are highly radioactive and pose significant hazards. These facilities require constant monitoring of the material's operational status, and the flow rate requirements are extremely stringent. To achieve real-time online monitoring of radioactive and highly acidic liquids, the conveying equipment must not only have a wide flow range but also operate in a safe and reliable environment to avoid potential radiation exposure to personnel during maintenance and repair.

[0003] For the feeding of radioactive materials and highly acidic liquids in online measuring devices, the following characteristics are required: quantitative feeding, inclined feeding, bubble-free operation, recyclability, and device stability. Existing feeding devices include a feeding tank for storing radioactive liquids, a single air lifting device, and an online detection device for monitoring the radioactive liquids, connected in sequence. However, these feeding devices suffer from difficulties in inclined feeding. Summary of the Invention

[0004] The technical problem to be solved by this application is to address the above-mentioned deficiencies in the prior art by providing a liquid conveying device and a high-discharge liquid treatment system. Using this liquid conveying device, there is a height difference between the first end of the online measuring device and the outlet of the measuring supply tank, thereby improving or solving the problem of difficult inclined feeding in the liquid conveying device.

[0005] In a first aspect, embodiments of this application provide a liquid conveying device, comprising:

[0006] Feeding tank, used to load the target liquid material;

[0007] The buffer tank is connected to the feed trough via the first lifting pipeline, and the height of the buffer tank is higher than the height of the feed trough.

[0008] The first air lifting device is installed on the first lifting pipeline and is used to transfer the target liquid material in the feeding tank to the buffer tank through the first lifting pipeline.

[0009] The measuring supply tank is connected to the buffer tank via a second lifting pipeline, and its height is higher than that of the buffer tank.

[0010] The second air lifting device is installed on the second lifting pipeline and is used to transfer the target liquid in the buffer tank to the measuring supply tank via the second lifting pipeline.

[0011] An online measuring device is used to measure the target liquid in the measuring supply tank. Its first end is connected to the measuring supply tank, and the position of the first end is lower than the lowest point of the measuring supply tank, so that there is a height difference between the first end of the online measuring device and the outlet of the measuring supply tank.

[0012] In some embodiments of the first aspect, the second end of the online measuring device is connected to the feeding tank via a first return line.

[0013] After measurement, the target liquid in the measuring supply tank can be returned to the supply tank through the first return pipeline.

[0014] In some embodiments of the first aspect, the first return line includes a first return sub-line and a second return sub-line, the first return sub-line being arranged along a first direction and the second return line being arranged along a second direction, the first direction and the second direction intersecting.

[0015] The device also includes:

[0016] The drain pipe is installed on the first return liquid pipeline.

[0017] In some embodiments of the first aspect, the buffer tank is also connected to the feed trough via a second return line;

[0018] Once the buffer tank is full, the target liquid can be returned to the feed tank via the second return line.

[0019] In some embodiments of the first aspect, the first lifting pipeline includes a first sub-lifting pipeline and a second sub-lifting pipeline, the first sub-lifting pipeline being connected between the feed trough and the first air lifting device, and the second sub-lifting pipeline being connected between the first air lifting device and the buffer tank;

[0020] The height of the first air lifting device is lower than the bottom of the feeding trough, and the first height difference between it and the lowest point of the first sub-lifting pipeline is h1, where h1 ≥ 400 mm;

[0021] And / or,

[0022] The second lifting line includes a third sub-lifting line and a fourth sub-lifting line. The third sub-lifting line is connected between the buffer tank and the second air lifting device, and the fourth sub-lifting line is connected between the second air lifting device and the measuring supply tank.

[0023] The height of the second air lifting device is higher than the top of the feeding trough, and the second height difference between it and the lowest point of the fourth sub-lifting pipeline is h2, where h2 ≥ 400 mm.

[0024] In some embodiments of the first aspect, the feeding trough, buffer tank, first air lifting device, measuring supply tank, second air lifting device, and online measuring device are all housed within a sealed shielded container;

[0025] The sealed shielding container is made of concrete, and the outside of the concrete is covered with a shielding and sealing layer.

[0026] In some embodiments of the first aspect, the online measuring device is disposed on top of the sealed shielded container;

[0027] The device also includes:

[0028] The maintenance section, located outside the sealed shielded container and corresponding to the position of the online measuring device, is used to perform maintenance and repair on the online measuring device through the opening at the top of the sealed shielded container.

[0029] In some embodiments of the first aspect, the first end of the online measuring device is connected to the measuring supply tank via a feed pipe;

[0030] The highest point of the feed pipe is lower than the lowest point of the measuring supply tank.

[0031] In some embodiments of the first aspect, the sealed shielding container includes a first sub-container and an adjacent second sub-container, the height of the first sub-container being less than the height of the second sub-container;

[0032] The first sub-container is equipped with a feeding trough and an online measuring device;

[0033] The second sub-container is equipped with a buffer tank, a first air lifting device, a measurement supply tank, and a second air lifting device; the measurement supply tank is located at a higher position than the online measurement device.

[0034] In some embodiments of the first aspect, the apparatus further includes:

[0035] The first end of the online measuring device is connected to the measuring supply tank via a feed pipe;

[0036] The distance between the highest point of the feed pipe and the top of the first sub-container is g, where g ≥ 400 mm.

[0037] In some embodiments of the first aspect, the distance between the outlet of the online measuring device and the highest point of the feed pipe is M, where M ≥ 2m.

[0038] Based on the same inventive concept, in a second aspect, embodiments of this application also provide a high-discharge liquid treatment system, comprising:

[0039] A concentrator is used to concentrate the feed liquid produced by a nuclear power plant to form a high-level radioactive feed liquid;

[0040] The feed conveying device of any of the first aspects has its input end connected to a concentrator for receiving the high-volume feed liquid output from the concentrator, measuring the high-volume feed liquid, and outputting the measured high-volume feed liquid.

[0041] According to the embodiments of this application, the liquid conveying device and the high-discharge liquid treatment system include, in a first aspect, an online measuring device and a measuring supply tank. The first end of the online measuring device connected to the measuring supply tank is located below the lowest point of the measuring supply tank, resulting in a height difference between the first end of the online measuring device and the outlet of the measuring supply tank. This improves or solves the problem of difficult inclined feeding in the liquid conveying device. In a second aspect, the device also includes a buffer tank, which can stabilize the liquid level and pressure of the target liquid, thereby improving the accuracy of the online measuring device in measuring the target liquid. In a third aspect, the device also includes a first air lifting device and a second air lifting device, which use the density difference of the liquid to convey the liquid, and can transfer the target liquid in the feeding tank to the measuring supply tank. The first air lifting device and the second air lifting device are non-mechanical devices with simple structures. Attached Figure Description

[0042] Figure 1 This illustration shows a structural schematic diagram of a liquid conveying device provided in an embodiment of this application;

[0043] Figure 2 This illustration shows another structural schematic diagram of the liquid conveying device provided in an embodiment of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 1. Feeding trough; 2. Sealed shielded container; 3. Shielding sealing layer; 4a. First air lifting device; 4b. Second air lifting device; 5. Buffer tank; 6. Measuring supply tank; 7. Online measuring device; 8. Flushing pipe; 9. Drain pipe; 10a. First lifting pipeline; 10b. Second lifting pipeline; 11. Feed pipe; 12. First return liquid pipeline; 13. Second return liquid pipeline; 14a. First compressed air pipeline; 14b. Second compressed air pipeline; 15. Equipment support; 16. Maintenance department; 17. Crane; 18. Door. Detailed Implementation

[0046] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] The features and exemplary embodiments of various aspects of this application will now be described in detail. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only configured to explain this application and are not configured to limit this application. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples of this application.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0049] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0050] Example 1

[0051] like Figures 1 to 2 As shown, the liquid conveying device provided in this application embodiment may include a feeding tank 1, a buffer tank 5, a first air lifting device 4a, a measuring supply tank 6, a second air lifting device 4b, and an online measuring device 7.

[0052] The feed tank 1 is used to load the target liquid. The target liquid may include at least one of the following: low-radioactivity liquid (i.e., low-release liquid), medium-radioactivity liquid (i.e., medium-release liquid), high-radioactivity liquid (i.e., high-release liquid), and highly acidic liquid.

[0053] The buffer tank 5 is connected to the feed trough 1 via the first lifting pipeline 10a, and the height of the buffer tank 5 is higher than the height of the feed trough 1. That is to say, the first lifting pipeline 10a is set between the buffer tank 5 and the feed trough 1, and the lowest point of the buffer tank 5 is higher than the highest point of the feed trough 1.

[0054] For example, buffer tank 5 can be used to stabilize the level and pressure of the target liquid.

[0055] In this embodiment, the liquid conveying device includes a buffer tank, which can stabilize the liquid level and pressure of the target liquid, thereby improving the accuracy of the online measuring device in measuring the target liquid.

[0056] The first air lifting device 4a is installed on the first lifting pipeline 10a and is used to transfer the target liquid material in the feeding tank 1 to the buffer tank 5 through the first lifting pipeline 10a.

[0057] In other words, the first air lifting device 4a is connected to the feeding trough 1 through the first lifting pipeline 10a, and the first air lifting device 4a is connected to the buffer tank 5 through the first lifting pipeline 10a.

[0058] For example, the liquid conveying device may further include a first air pipe 14a, which is connected to a first air lifting device 4a and is used to provide compressed air of different flow rates to the first air lifting device 4a.

[0059] It should be noted that when compressed air of different flow rates is introduced into the first compressed air pipe 14a, there are different density differences on both sides of the first lift pipe 10a, resulting in different flow rates of the target liquid being lifted in the first lift pipe 10a.

[0060] The measuring supply tank 6 and the buffer tank 5 are connected by a second lifting pipeline 10b, the latter being higher than the former.

[0061] In other words, the second lifting pipeline 10b is located between the measuring supply tank 6 and the buffer tank 5, with the lowest point of the measuring supply tank 6 being higher than the highest point of the buffer tank 5.

[0062] For example, the measurement supply tank 6 is used to provide the target liquid to the online measurement device 7.

[0063] The second air lifting device 4b is installed on the second lifting pipeline 10b and is used to transfer the target liquid in the buffer tank 5 to the measuring supply tank 6 via the second lifting pipeline 10b.

[0064] That is, the second air lifting device 4b is connected to the buffer tank 5 through the second lifting pipeline 10b, and the second air lifting device 4b is connected to the measuring supply tank 6 through the second lifting pipeline 10b.

[0065] In this embodiment, the device further includes a first air lifting device and a second air lifting device, i.e., a two-stage air lifting device is used to transport the liquid by utilizing the density difference of the liquid, which can transfer the target liquid in the supply tank to the measuring supply tank. Furthermore, the first and second air lifting devices are non-mechanical devices with simple structures.

[0066] For example, the liquid conveying device may further include a second compressed air pipe 14b, which is connected to the second air lifting device 4b and is used to provide compressed air of different flow rates to the second air lifting device 4b.

[0067] It should be noted that when compressed air of different flow rates is introduced into the second compressed air pipe 14b, there are different density differences on both sides of the second lift pipe 10b, resulting in different flow rates of the target liquid being lifted in the second lift pipe 10b.

[0068] It is understandable that the location of the measuring supply tank 6 is closely related to the length of the online measuring device 7.

[0069] The online measuring device 7 is used to measure the target liquid in the measuring supply tank 6. Its first end is connected to the measuring supply tank 6, and the position of the first end is lower than the lowest point of the measuring supply tank 6, so that there is a height difference between the first end of the online measuring device 7 and the outlet of the measuring supply tank 6.

[0070] For example, the online measuring device 7 is used to measure the material characteristic parameters of the target liquid in the measuring supply tank 6. The material characteristic parameters include radioactivity, pH value, and flow rate. For instance, if the target liquid includes at least one of high-emission, medium-emission, and low-emission liquids, the material characteristic parameters may include radioactivity and flow rate; or, for example, if the target liquid includes a highly acidic liquid, the material characteristic parameters may include pH value and flow rate.

[0071] For example, the first end of the online measuring device 7 is connected to one end of the measuring supply tank 6.

[0072] In this embodiment, the first end is located below the lowest point of the measuring supply tank, resulting in a height difference between the first end of the online measuring device and the outlet of the measuring supply tank, which can improve or solve the problem of difficult inclined feeding in the liquid conveying device.

[0073] In some embodiments, the second end of the online measuring device 7 is connected to the feeding tank 1 via the first return liquid line 12.

[0074] After measurement, the target liquid in the measuring supply tank 6 can be returned to the feeding tank 1 through the first return pipeline 12.

[0075] For example, the second end of the online measuring device 7 can be the end connected to the feeding tank 1, which is also the end connected to the first return liquid line 12.

[0076] In other words, the first return line 12 is located between the online measuring device 7 and the feed tank 1.

[0077] In some examples, the first return line 12 includes a first return sub-line and a second return sub-line, the first return sub-line being arranged along a first direction and the second return sub-line being arranged along a second direction, the first direction and the second direction intersecting.

[0078] For example, the first direction may be Figure 1 and Figure 2 The direction from left to right in the middle, the second direction can be... Figure 1 and Figure 2 The direction from top to bottom.

[0079] For example, the first return liquid line may be Figure 1 and Figure 2 In the middle, the first return liquid line 12 is horizontally set; the second return liquid sub-line can be... Figure 1 and Figure 2 In the middle, the first return pipeline 12 is set vertically. Figure 1 and Figure 2 The dashed line in the diagram represents the boundary line of the first return pipeline 12.

[0080] The device also includes:

[0081] Drain pipe 9 is installed on the first return liquid pipeline.

[0082] Through extensive research, the inventors discovered that the height difference of the first return pipeline 12 is relatively large, which makes it very easy for siphon flow interruption to occur, resulting in unstable liquid level in the feed tank 1, thereby affecting the stability of the entire liquid conveying system.

[0083] In this example, by installing a drain pipe on the first return liquid sub-line, that is, by adding a drain pipe to the horizontal pipe of the first return liquid line, the siphon interruption phenomenon can be effectively improved or avoided, which is conducive to the stability of the liquid level in the feed tank 1, thereby improving the stability of the entire liquid conveying system. In addition, adding a drain pipe to the horizontal pipe of the first return liquid line can also eliminate small air bubbles in the feed pipe below, improving the accuracy of the online measuring device and the stability of the liquid conveying system.

[0084] In some embodiments, the buffer tank 5 is also connected to the feed tank 1 via the second return line 13;

[0085] After the target liquid in the buffer tank 5 is filled, it can be returned to the feed tank 1 through the second return line 13.

[0086] In other words, the second return pipeline 13 is located between the buffer tank 5 and the feed trough 1.

[0087] In this embodiment, by setting a second return pipeline between the buffer tank and the feed tank, the target liquid in the buffer tank can be returned to the feed tank through the second return pipeline after the buffer tank is full, thereby making the liquid level in the buffer tank stable and constant.

[0088] In some embodiments, the first lifting pipeline 10a includes a first sub-lifting pipeline and a second sub-lifting pipeline. The first sub-lifting pipeline is connected between the feed trough 1 and the first air lifting device 4a, and the second sub-lifting pipeline is connected between the first air lifting device 4a and the buffer tank 5.

[0089] In other words, the feeding trough 1 is connected to the first air lifting device 4a through the first sub-lifting pipeline, and the first air lifting device 4a is connected to the buffer tank 5 through the second sub-lifting pipeline.

[0090] The height of the first air lifting device 4a is lower than the bottom of the feeding trough 1, and the first height difference between it and the lowest point of the first sub-lifting pipeline is h1, where h1 ≥ 400 mm. That is, the highest point of the first air lifting device 4a is lower than the lowest point of the feeding trough 1, and the height difference between the first air lifting device 4a and the lowest horizontal pipe of the first lifting pipeline 10a is h1.

[0091] The inventors discovered that the arrangement height of the first height difference h1 is related to the direction of compressed air in the first compressed air pipe 14a. If h1 is too small, compressed air may enter the feed trough 1, posing a risk of compressed air leakage.

[0092] In this embodiment, by setting h1≥400mm, the risk of compressed air leakage can be effectively improved or resolved.

[0093] In some embodiments, the second lifting line 10b includes a third sub-lifting line and a fourth sub-lifting line, the third sub-lifting line being connected between the buffer tank 5 and the second air lifting device 4b, and the fourth sub-lifting line being connected between the second air lifting device 4b and the measuring supply tank 6.

[0094] In other words, the buffer tank 5 is connected to the second air lifting device 4b through the third sub-lifting pipeline, and the second air lifting device 4b is connected to the measuring supply tank 6 through the fourth sub-lifting pipeline.

[0095] The height of the second air lifting device 4b is higher than the top of the feeding trough 1, and the second height difference between it and the lowest point of the fourth sub-lifting pipeline is h2, where h2 ≥ 400 mm. That is, the lowest point of the second air lifting device 4b is higher than the highest point of the feeding trough 1, and the height difference between the second air lifting device 4b and the lowest horizontal pipe of the second lifting pipeline 10b is h2.

[0096] The inventors discovered that the arrangement height of the second height difference h2 is related to the direction of compressed air in the second compressed air pipe 14b. If h2 is too small, compressed air may enter the feed trough 1, posing a risk of compressed air leakage.

[0097] In this embodiment, by setting h2≥400mm, the risk of compressed air leakage can be effectively improved or resolved.

[0098] In some embodiments, the feeding trough 1, buffer tank 5, first air lifting device 4a, measuring supply tank 6, second air lifting device 4b and online measuring device 7 are all housed inside the sealed shielded container 2;

[0099] The sealed shielding container 2 is made of concrete, and the outside of the concrete is covered with a shielding and sealing layer 3.

[0100] In this embodiment, since the feeding trough, buffer tank, first air lifting device, measuring supply tank, second air lifting device, and online measuring device are all housed within a sealed shielded container, the entire transport process of the target liquid is completed within the sealed shielded container. The sealed shielded container is made of concrete, and the outside of the concrete is covered with a shielding sealing layer. This means that shielding protection is achieved through the concrete and the shielding sealing layer, resulting in excellent sealing and shielding performance. This effectively prevents leakage of the target liquid within the sealed shielded container and provides good radiation safety performance.

[0101] For example, the sealed shielding container 2 may be a sealed shielding box.

[0102] In some examples, the online measuring device 7 is positioned on top of the sealed shielded container 2;

[0103] The device also includes:

[0104] The maintenance unit 16 is located outside the sealed shielded container 2 and corresponds to the position of the online measuring device 7. It is used to perform maintenance on the online measuring device 7 through the opening at the top of the sealed shielded container 2.

[0105] In this embodiment, by placing the online measuring device on top of the sealed shielded container 2, the maintenance section is positioned corresponding to the location of the online measuring device, thereby facilitating the inspection and maintenance of the online measuring device. Furthermore, by providing the maintenance section, the online measuring device can be inspected and maintained, resulting in good radiation safety performance.

[0106] For example, the maintenance unit 16 may be a component capable of performing maintenance on the online testing device.

[0107] In some examples, the first end of the online measuring device 7 is connected to the measuring supply tank 6 via the feed pipe 11;

[0108] The highest point of the feed pipe 11 is lower than the lowest point of the measuring supply tank 6.

[0109] In other words, the feed pipe 11 is located between the online measuring device 7 and the measuring supply tank 6.

[0110] In this example, by setting the highest point of the feed pipe lower than the lowest point of the measuring supply tank, a height difference is created between the first end of the online measuring device and the outlet of the measuring supply tank, thereby improving or solving the problem of difficult inclined feeding in the liquid conveying device.

[0111] For example, the first air lifting device 4a uses compressed air in the first compressed air pipe 14a and the second air lifting device 4b uses compressed air in the second compressed air pipe 14b to generate a gas-liquid mixture in the feed pipe 11 to form a gas-liquid density difference, thereby achieving the delivery of the target liquid.

[0112] It should be noted that the arrangement of the online measuring device 7 requires precise measurement. The feed pipe 11 needs to be tilted for feeding. The target material in the feed pipe 11 needs to be fully fed without air bubbles. After passing through the online measuring device 7, the feed pipe 11 needs to be returned to the feeding tank 1.

[0113] It is understandable that the feed pipe 11 is the discharge pipe of the measuring supply tank 6, and the conveying power of the feed pipe 11 is gravity flow.

[0114] It should be noted that when compressed air is introduced into the first compressed air pipe 14a and then into the first air lifting device 4a, the compressed air flow rate increases, the density difference across the first lifting pipeline 10a increases accordingly, and the flow rate of the target liquid lifted within the first lifting pipeline 10a also increases. Similarly, when compressed air is introduced into the second compressed air pipe 14b and then into the second air lifting device 4b, the compressed air flow rate increases, the density difference across the second lifting pipeline 10b increases accordingly, and the flow rate of the target liquid lifted within the second lifting pipeline 10b also increases.

[0115] In some embodiments, the sealed shielding container 2 includes a first sub-container and an adjacent second sub-container, wherein the height of the first sub-container is less than the height of the second sub-container;

[0116] The first sub-container is equipped with a feeding trough 1 and an online measuring device 7.

[0117] The second sub-container contains a buffer tank 5, a first air lifting device 4a, a measuring supply tank 6, and a second air lifting device 4b. The measuring supply tank 6 is positioned higher than the online measuring device 7; that is, the lowest point of the measuring supply tank 6 is higher than the highest point of the online measuring device 7.

[0118] In this embodiment, compared to placing the measurement supply tank and the online measurement device in the same sub-container, the arrangement height of the measurement supply tank can be increased, providing a basis for the target liquid to complete sufficient gas-liquid separation in the measurement supply tank, ensuring no air bubbles in the feed pipe, and fully conveying the target liquid to the online measurement device, thereby improving the accuracy of the target liquid measurement.

[0119] In some examples, the first end of the online measuring device 7 is connected to the measuring supply tank 6 via the feed pipe 11;

[0120] The distance between the highest point of the feed pipe 11 and the top of the first sub-container is g, where g ≥ 400 mm. That is, the position where the feed pipe 11 obliquely passes through the wall is g ≥ 400 mm.

[0121] In this example, by setting the distance g between the highest point of the feed pipe and the top of the first sub-container to be ≥400mm, the length of the online measuring device can be reduced from an arrangement perspective, thereby saving costs.

[0122] In some examples, the distance between the outlet of the online measuring device 7 and the highest point of the feed pipe 11 is M, where M ≥ 2m.

[0123] In this example, by setting the distance M ≥ 2m between the outlet of the online measuring device 7 and the highest point of the feed pipe 11, the target liquid is fully separated into gas and liquid in the measuring supply tank, there are no air bubbles in the feed pipe, and the target liquid is fully transported to the online measuring device, thereby improving the accuracy of the target liquid measurement.

[0124] In some examples, the device also includes:

[0125] The flushing pipe 8 can penetrate the sealed shielded container 2 and connect to the feed pipe 11 to provide flushing water.

[0126] In this example, considering that different types of liquids are transported using the same liquid conveying device, flushing water can be introduced through the flushing pipe to flush the entire liquid conveying device before replacing it with another type of target liquid for liquid conveying.

[0127] In some examples, an accessible space can be provided above the online measuring device 7. When the online measuring device 7 needs inspection or maintenance, personnel can enter through the door 18, place the maintenance section 16 over the online measuring device 7, and use the crane 17 to lift and complete the inspection and maintenance operation of the online measuring device 7.

[0128] In some examples, the liquid conveying device may also include a device support 15 for supporting the feed trough 1.

[0129] The working process of the liquid conveying device provided in the embodiments of this application is described below. Figure 1 and Figure 2 As shown, the target liquid in the feeding tank 1 first passes through the first lifting pipeline 10a, and then the target liquid is lifted to the buffer tank 5 by the first air lifting device 4a. After the buffer tank 5 overflows, it flows back to the feeding tank 1 through the second return liquid pipeline 13. At this time, the liquid level in the buffer tank 5 is stable and constant. Then, the target liquid in the buffer tank 5 passes through the second lifting pipeline 10b, and the target liquid is lifted to the measuring supply tank 6 by the second air lifting device 4b. The target liquid in the measuring supply tank 6 flows by gravity through the feed pipe 11 to the online measuring device 7. The online measuring device 7 measures the target liquid, and the measured target liquid flows back to the feeding tank 1 through the first return liquid pipeline 12.

[0130] To better understand the liquid conveying device provided in the embodiments of this application, a more specific implementation method will be described below.

[0131] like Figure 1 and Figure 2 As shown, in this embodiment of the application, a two-stage air lifting device is used to transport the high-emission material (i.e., the target liquid) in the feeding tank 1 to the online measuring device 7. After the online measuring device 7 completes the monitoring, the high-emission material is returned to the feeding tank 1.

[0132] The conveying of high-temperature materials is carried out entirely within a sealed shielded box (i.e., sealed shielded container 2). An online measuring device 7 is positioned on top of the sealed box (i.e., sealed shielded container 2), and a maintenance and repair plan is provided for the online measuring device 7.

[0133] The air lifting device (i.e., the first air lifting device 4a and the second air lifting device 4b) in the feed pipe 11 uses compressed air in the compressed air pipe (i.e., the first compressed air pipe 14a and the second compressed air pipe 14b) to generate a gas-liquid mixture in the feed pipe 11, forming a gas-liquid density difference, thereby achieving the conveying of high-temperature materials.

[0134] The air lifting device monitors the flow rate. Compressed air of different flow rates is introduced into the compressed air pipe. The different density differences on both sides of the feeding pipe (i.e., the first lifting pipe 10a and the second lifting pipe 10b) result in different flow rates of liquid being lifted in the feeding pipe.

[0135] The height difference between the air lifting device and the lowest horizontal pipe of the feed pipe is h (i.e., the first height difference h1 and the second height difference h2). The arrangement height of h is related to the direction of compressed air in the compressed air pipe. If the h value is too small, compressed air may enter the feed trough 1, posing a risk of compressed air leakage. In this embodiment, optionally, h ≥ 400 mm (i.e., h1 ≥ 400 mm, h2 ≥ 400 mm) can effectively prevent compressed air leakage.

[0136] The sealed shielding box uses concrete shielding and a sealing layer (i.e., shielding and sealing layer 3) for shielding protection. It has a good sealing and shielding effect, which can prevent the leakage of high-emission liquid inside the shielding box and has good radiation safety performance.

[0137] The high-pressure material in the feeding tank 1 is first lifted to the first tank (i.e., buffer tank 5) through the feeding pipe using an air lifting device. After the first tank overflows, it flows back to the feeding tank 1 through the overflow pipe (i.e., the second return liquid line 13). At this time, the liquid level in the first tank is stable and constant. Then, the material is lifted to the second tank (i.e., measuring supply tank 6) through the feeding pipe using an air lifting device.

[0138] The liquid in the second tank flows by gravity to the online measuring device 7. After being monitored by the online measuring device 7, the liquid flows back to the feed tank 1 through the return pipe (i.e., the first return line 12).

[0139] The online measuring device 7 and the feeding tank 1 are arranged in a closed space, and the liquid conveying system is arranged in an adjacent room.

[0140] The online measuring device 7 is designed for precise monitoring. The feed pipe 11 needs to be tilted for feeding, and the material in the feed pipe must be fully fed without air bubbles. After passing through the online measuring device 7, the feed pipe needs to be returned to the feeding trough 1.

[0141] The location of the second tank is closely related to the length of the online measuring device 7. The feed pipe 11 is the discharge pipe of the second tank, and the liquid is transported by gravity.

[0142] The second tank and the online measuring device 7 are arranged in separate rooms, with the second tank's arrangement height increased. Simultaneously, the inlet pipe 11 is specified to have an inclined wall penetration position g ≥ 400mm. This embodiment optimizes the layout, compressing the length of the online measuring device 7 from an arrangement perspective, thus saving costs.

[0143] The second tank is raised, and its lower outlet pipe is positioned high enough (M≥2m) to be higher than the feed pipe of the online measuring device 7, so that the high-release material can complete sufficient gas-liquid separation in the second tank. There are no air bubbles in the feed pipe 11, and the material can be fully transported to the online measuring device 7, thereby improving the accuracy of monitoring.

[0144] The large elevation difference in the return pipe makes it prone to siphon flow interruption, leading to unstable liquid levels in the feed tank 1 and affecting the stability of the entire liquid circulation and conveying system. The optimized layout scheme in this embodiment, by adding a drain pipe 9 to the horizontal pipe of the return pipe, effectively avoids siphon flow interruption and also eliminates small air bubbles in the feed pipe 11, improving monitoring accuracy and the stability of liquid circulation.

[0145] This application embodiment also considers using the same liquid circulation system to transport different types of liquids. The entire liquid circulation system (i.e., the liquid conveying device) can be flushed with flushing water through the flushing pipe 8 before being replaced with another type of liquid for conveying.

[0146] The inspection and maintenance of high-level radioactive materials should focus on radiation protection safety. Online measuring devices can be inspected and maintained by special inspection containers (i.e., inspection section 16).

[0147] An accessible space is provided above the online measuring device 7. When the online measuring device 7 needs inspection or maintenance, personnel can enter through the door 18, place the inspection container 16 over the online measuring device 7, and use the crane 17 to lift it to complete the inspection and maintenance operation of the online measuring device 7.

[0148] This application provides a liquid-feed circulation conveying system (i.e., liquid-feed conveying device) for an online measurement device for high-level radioactive materials. The system conveys the high-level radioactive materials in the feeding tank 1 to the online measurement device 7. After the online measurement device 7 completes the monitoring, it returns the high-level radioactive materials to the feeding tank 1.

[0149] The high-level radioactive materials are transported entirely within a sealed shielded box (i.e., sealed shielded container 2). The sealed shielded box employs two layers of shielding protection: concrete and a sealing layer (i.e., shielding sealing layer 3). This provides excellent sealing and shielding, preventing leakage of the high-level radioactive liquid within the shielded box.

[0150] The conveying device is an air lifting device. This device utilizes the density difference of the material to transport the liquid; it is a non-mechanical device with a simple structure. Compressed air is introduced into the air lifting device through the compressed air pipe. As the compressed air flow rate increases, the density difference across the feeding pipe increases, thus increasing the flow rate of the liquid lifted from the feeding pipe. For example, the compressed air pressure range can be [0.4, 0.6] MPa.

[0151] Flow monitoring of the air lifting device and its positional relationship with the feed pipe.

[0152] The air lifting device monitors the flow rate. Different flow rates of compressed air are introduced into the compressed air pipe, and the different density differences on both sides of the feeding pipe result in different flow rates of liquid being lifted in the feeding pipe.

[0153] The working process of the liquid conveying device in this embodiment is as follows:

[0154] The material in the feeding tank 1 is first lifted to the first tank through the feeding pipe using an air lifting device. After the first tank overflows, it flows back to the feeding tank 1 through the overflow pipe. At this time, the liquid level in the first tank is stable and constant. Then, the material is lifted to the second tank through the feeding pipe using an air lifting device.

[0155] The liquid in the second tank flows by gravity to the online measuring device 7. After being monitored by the online measuring device 7, the liquid flows back to the feed tank 1 through the return pipe (i.e., the first return line 12).

[0156] When the liquid in the second tank flows by gravity to the online measuring device 7, the feed pipe 11 is tilted upwards, which can effectively reduce liquid air bubbles in the feed pipe 11 and improve the accuracy of monitoring. Crucially, the highest point of the tilt of the feed pipe 11 must not be higher than the lowest point of the second tank.

[0157] Meanwhile, the height difference between the online measuring device 7 and the feeding trough 1 is large, and siphoning is likely to occur when the return pipe flows back. The addition of the vent pipe 9 can effectively avoid siphoning and also vent air bubbles in the feed pipe 11.

[0158] Example 2

[0159] This application also provides a high-discharge liquid treatment system, characterized in that it includes:

[0160] A concentrator is used to concentrate the feed liquid produced by a nuclear power plant to form a high-level radioactive feed liquid;

[0161] As in any of the embodiments of Example 1, the feed liquid conveying device has its input end connected to the concentrator, used to receive the high discharge feed liquid output by the concentrator, measure the high discharge feed liquid, and output the measured high discharge feed liquid.

[0162] For example, the feed liquid generated by a nuclear power plant may include feed liquid generated during reprocessing.

[0163] The high-efficiency liquid treatment system provided in this application includes the liquid conveying device of any one of the embodiments in Embodiment 1, that is, it has the beneficial effects and implementation methods of the liquid conveying device provided in Embodiment 1 of this application. For details, please refer to the specific description of the liquid conveying device in Embodiment 1 above. This embodiment will not repeat the description here.

[0164] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this application, and this application is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this application, and these modifications and improvements are also considered to be within the scope of protection of this application.

Claims

1. A liquid conveying device, characterized in that, include: Feed tank (1) is used to load the target liquid material; The buffer tank (5) is connected to the feed trough (1) through the first lifting pipeline (10a), and the height of the buffer tank (5) is higher than the height of the feed trough (1). The first air lifting device (4a) is installed on the first lifting pipeline (10a) and is used to transfer the target liquid in the feeding tank (1) to the buffer tank (5) via the first lifting pipeline (10a). The measuring supply tank (6) is connected to the buffer tank (5) through a second lifting pipeline (10b), and its height is higher than that of the buffer tank (5); The second air lifting device (4b) is installed on the second lifting pipeline (10b) and is used to transfer the target liquid in the buffer tank (5) to the measuring supply tank (6) via the second lifting pipeline (10b). An online measuring device (7) is used to measure the target liquid in the measuring supply tank (6). Its first end is connected to the measuring supply tank (6). The position of the first end is lower than the lowest point of the measuring supply tank (6), so that there is a height difference between the first end of the online measuring device (7) and the outlet of the measuring supply tank (6). The feeding trough (1), the buffer tank (5), the first air lifting device (4a), the measuring supply tank (6), the second air lifting device (4b) and the online measuring device (7) are all installed inside the sealed shielded container (2); The sealed shielding container (2) includes a first sub-container and an adjacent second sub-container, wherein the height of the first sub-container is less than the height of the second sub-container; The first sub-container is equipped with the feeding trough (1) and the online measuring device (7); The second sub-container is equipped with the buffer tank (5), the first air lifting device (4a), the measurement supply tank (6), and the second air lifting device (4b); the measurement supply tank (6) is located higher than the online measurement device (7); The device further includes: The first end of the online measuring device (7) is connected to the measuring supply tank (6) through the feed pipe (11); The distance between the highest point of the feed pipe (11) and the top of the first sub-container is g, where g ≥ 400 mm; The distance between the outlet of the online measuring device (7) and the highest point of the feed pipe (11) is M, where M ≥ 2m.

2. The apparatus according to claim 1, characterized in that, The second end of the online measuring device (7) is connected to the feeding tank (1) through the first return liquid pipeline (12). After measurement, the target liquid in the measuring supply tank (6) can be returned to the feeding tank (1) through the first return liquid pipeline (12).

3. The apparatus according to claim 2, characterized in that, The first return liquid line (12) includes a first return liquid sub-line and a second return liquid sub-line. The first return liquid sub-line is arranged along a first direction, and the second return liquid line is arranged along a second direction. The first direction and the second direction intersect. The device further includes: The drain pipe (9) is installed on the first return liquid sub-pipeline.

4. The apparatus according to claim 1, characterized in that, The buffer tank (5) is also connected to the feed tank (1) via the second return pipeline (13); After the target liquid in the buffer tank (5) is filled, it can be returned to the feed tank (1) through the second return pipeline (13).

5. The apparatus according to claim 1, characterized in that, The first lifting pipeline (10a) includes a first sub-lifting pipeline and a second sub-lifting pipeline. The first sub-lifting pipeline is connected between the feeding trough (1) and the first air lifting device (4a), and the second sub-lifting pipeline is connected between the first air lifting device (4a) and the buffer tank (5). The height of the first air lifting device (4a) is lower than the bottom of the feeding trough (1), and the first height difference between it and the lowest point of the first sub-lifting pipeline is h1, h1≥400mm; And / or, The second lift line (10b) includes a third sub-lift line and a fourth sub-lift line. The third sub-lift line is connected between the buffer tank (5) and the second air lift device (4b), and the fourth sub-lift line is connected between the second air lift device (4b) and the measuring supply tank (6). The height of the second air lifting device (4b) is higher than the top of the feeding trough (1), and the second height difference between it and the lowest point of the fourth sub-lifting pipeline is h2, h2≥400mm.

6. The apparatus according to claim 1, characterized in that, The sealed shielding container (2) is made of concrete, and the outside of the concrete is covered with a shielding sealing layer (3).

7. The apparatus according to claim 6, characterized in that, The online measuring device (7) is installed on top of the sealed shielded container (2); The device further includes: The maintenance unit (16) is located outside the sealed shielded container (2) and corresponds to the position of the online measuring device (7). It is used to perform maintenance on the online measuring device (7) through the opening at the top of the sealed shielded container (2).

8. The apparatus according to claim 6, characterized in that, The first end of the online measuring device (7) is connected to the measuring supply tank (6) through the feed pipe (11); The highest point of the feed pipe (11) is lower than the lowest point of the measuring supply tank (6).

9. A high-discharge liquid treatment system, characterized in that, include: A concentrator is used to concentrate the feed liquid produced by a nuclear power plant to form a high-level radioactive feed liquid; The feed liquid conveying device as described in any one of claims 1-8 has its input end connected to a concentrator for receiving high-volume feed liquid output from the concentrator, measuring the high-volume feed liquid, and outputting the measured high-volume feed liquid.

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