Feed liquid conveying device and high-level discharge feed liquid treatment system

Abstract

The invention discloses a feed liquid conveying device and a high-level discharge feed liquid treatment system, and relates to the technical field of nuclear industry. The feed liquid conveying device comprises a feed tank used for loading target feed liquid; the buffer tank is communicated with the feeding groove through a first lifting pipeline; the first air lifting device is arranged on the first lifting pipeline; the measurement supply tank is communicated with the buffer tank through a second lifting pipeline and is higher than the buffer tank; the second air lifting device is arranged on the second lifting pipeline; the on-line measuring device is used for measuring the target material liquid in the measuring supply tank, the first end of the on-line measuring device is communicated with the measuring supply tank, and the position of the first end is lower than the lowest point of the measuring supply tank, so that the height difference exists between the first end of the on-line measuring device and the outlet of the measuring supply tank. According to the embodiment of the invention, the device can improve or solve the problem of difficult inclined feeding of a feed liquid conveying device.

Description

Technical Field

[0001] The present application belongs to the field of nuclear industry technology, and specifically relates to a liquid feed conveying device and a high-release liquid feed processing system. Background Art

[0002] The materials involved in the process equipment of nuclear industry radiochemical facilities are highly radioactive and harmful. The process equipment needs to monitor the operating status of the materials at all times, and the requirements for flow transportation are also extremely high. In order to achieve real-time online monitoring of radioactive liquid and highly acidic liquid, the transportation device must not only have a wide flow range, but also operate in a safe and reliable environment to avoid possible radiation exposure to workers during inspection and maintenance.

[0003] For the liquid conveying of the online measuring device for radioactive materials and highly acidic liquid, it is necessary to have the characteristics of quantitative conveying, inclined feeding, no bubbles, circulation, and stable device. The liquid conveying device in the prior art includes a liquid tank for storing radioactive liquid, a single air lifting device, and an online detection device for detecting the radioactive liquid. However, the above liquid conveying device has the problem of difficulty in inclined feeding. Summary of the invention

[0004] The technical problem to be solved by the present application is to provide a liquid feed conveying device and a high-release liquid feed processing system in view of the above-mentioned deficiencies in the prior art. By using the liquid feed conveying device, 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 difficulty in inclined feeding in the liquid feed conveying device.

[0005] In a first aspect, an embodiment of the present application provides a liquid feed conveying device, comprising:

[0006] A feed tank, used for loading target liquid;

[0007] A buffer tank is connected to the feed tank through a first lifting pipeline, and the height of the buffer tank is higher than that of the feed tank;

[0008] A first air lifting device is arranged on the first lifting pipeline and is used to transfer the target liquid in the feed tank to the buffer tank via the first lifting pipeline;

[0009] a measuring supply tank, which is connected to the buffer tank through a second lifting pipeline and has a height higher than that of the buffer tank;

[0010] A second air lifting device is provided on the second lifting pipeline and is used to transfer the target liquid in the buffer tank to the measurement supply tank via the second lifting pipeline;

[0011] The 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. 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 feed tank through a first liquid return line.

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

[0014] In some embodiments of the first aspect, the first liquid return pipeline includes a first liquid return sub-pipeline and a second liquid return sub-pipeline, the first liquid return sub-pipeline is arranged along a first direction, the second liquid return sub-pipeline is arranged along a second direction, and the first direction and the second direction intersect;

[0015] The device also includes:

[0016] The drain pipe is arranged on the first liquid return line.

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

[0018] After the target liquid in the buffer tank is filled, it can be returned to the feed tank through the second return liquid pipeline.

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

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

[0021] and / or,

[0022] The second lifting pipeline includes a third sub-lifting pipeline and a fourth sub-lifting pipeline, the third sub-lifting pipeline is connected between the buffer tank and the second air lifting device, and the fourth sub-lifting pipeline is connected between the second air lifting device and the measurement supply tank;

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

[0024] In some embodiments of the first aspect, the feed tank, the buffer tank, the first air lift device, the measurement supply tank, the second air lift device, and the online measurement device are all disposed in a sealed shielding container;

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

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

[0027] The device also includes:

[0028] The inspection and maintenance part is arranged outside the sealed shielding container and corresponds to the position of the online measuring device, and is used for inspecting and maintaining the online measuring device through the opening at the top of the sealed shielding container.

[0029] In some embodiments of the first aspect, the first end of the online measurement device is connected to the measurement supply tank through 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 a second sub-container adjacent thereto, and a height of the first sub-container is less than a height of the second sub-container;

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

[0033] The second sub-container is provided 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 position higher than the position of the online measurement device.

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

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

[0036] The distance between the highest point of the feed pipe and the top of the first sub-container is g, and 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 feeding pipe is M, and M≥2m.

[0038] Based on the same inventive concept, in a second aspect, the embodiment of the present application further provides a high discharge liquid processing system, comprising:

[0039] Concentrator, used to concentrate the liquid generated by the nuclear power plant to form high-release liquid;

[0040] For example, the liquid conveying device of any one of the first aspects has its input end connected to the concentrator, and is used to receive the high-discharge liquid output by the concentrator, measure the high-discharge liquid, and output the measured high-discharge liquid.

[0041] According to the liquid conveying device and high-release liquid processing system provided in the embodiments of the present application, on the first aspect, the device includes an online measuring device and a measuring supply tank, and the position of the first end of the online measuring device connected to the measuring supply tank 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, thereby improving or solving the problem of difficulty in inclined feeding in the liquid conveying device; on the 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; on the 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 feed tank to the measuring supply tank. The first air lifting device and the second air lifting device are non-mechanical equipment with a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 A schematic diagram showing the structure of a liquid material conveying device provided in an embodiment of the present application is shown;

[0043] Figure 2 Another structural schematic diagram of the liquid feed conveying device provided in an embodiment of the present application is shown.

[0044] Description of reference numerals:

[0045] 1. Feed trough; 2. Sealed shielding 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 pipe; 14b. Second compressed air pipe; 15. Equipment support; 16. Maintenance department; 17. Crane; 18. Door. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the technical solution of the present application, the present application is further described in detail below with reference to the accompanying drawings and embodiments.

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

[0048] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "include..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0049] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0050] Example 1

[0051] like Figure 1 to Figure 2 As shown, the liquid conveying device provided in the embodiment of the present application may include a feed tank 1, a buffer tank 5, a first air lifting device 4a, a measurement 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 low-radioactive liquid (i.e., low-discharge liquid), medium-radioactive liquid (i.e., medium-discharge liquid), high-radioactive liquid (i.e., high-discharge liquid), and highly acidic liquid.

[0053] The buffer tank 5 is connected to the feed tank 1 through the first lifting pipeline 10a, and the height of the buffer tank 5 is higher than the height of the feed tank 1. In other words, the first lifting pipeline 10a is arranged between the buffer tank 5 and the feed tank 1, and the lowest point of the buffer tank 5 is higher than the highest point of the feed tank 1.

[0054] Exemplarily, the buffer tank 5 may be used to stabilize the liquid level and pressure of the target liquid.

[0055] In an embodiment of the present application, 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 4 a is disposed on the first lifting pipeline 10 a and is used to transfer the target liquid in the feed tank 1 to the buffer tank 5 via the first lifting pipeline 10 a .

[0057] That is, the first air lifting device 4a is in communication with the feed tank 1 through the first lifting line 10a, and the first air lifting device 4a is in communication with the buffer tank 5 through the first lifting line 10a.

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

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

[0060] The measurement supply tank 6 is in communication with the buffer tank 5 via a second lifting pipeline 10 b , the height of which is higher than that of the buffer tank 5 .

[0061] That is, the second lifting line 10 b is disposed between the measuring supply tank 6 and the buffer tank 5 , and the lowest point of the measuring supply tank 6 is higher than the highest point of the buffer tank 5 .

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

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

[0064] That is, the second air lifting device 4b is in communication with the buffer tank 5 through the second lifting line 10b, and the second air lifting device 4b is in communication with the measurement supply tank 6 through the second lifting line 10b.

[0065] In the embodiment of the present application, the device further includes a first air lifting device and a second air lifting device, that is, a two-stage air lifting device is used to transport the liquid by utilizing the density difference of the liquid, and the target liquid in the feed tank can be transferred to the measurement supply tank. In addition, the first air lifting device and the second air lifting device are non-mechanical devices with a simple structure.

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

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

[0068] It can be understood that the arrangement position of the measurement supply tank 6 is greatly related to the equipment length size of the online measurement 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. 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] Exemplarily, 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, flow rate, etc. For example, when the target liquid includes at least one of high discharge liquid, medium discharge liquid and low discharge liquid, the material characteristic parameters may include radioactivity and flow rate, etc.; for another example, when the target liquid includes highly acidic liquid, the material characteristic parameters may include pH value and flow rate, etc.

[0071] Exemplarily, the first end of the online measuring device 7 is an end connected to the measuring supply tank 6 .

[0072] In an embodiment of the present application, 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, thereby improving or solving the problem of difficulty in inclined feeding in the liquid conveying device.

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

[0074] After being measured, the target liquid in the measuring supply tank 6 can be returned to the feed tank 1 through the first liquid return line 12 .

[0075] Exemplarily, the second end of the online measuring device 7 may be an end connected to the feed tank 1 , that is, an end connected to the first liquid return line 12 .

[0076] That is to say, the first liquid return line 12 is arranged between the online measuring device 7 and the feed tank 1 .

[0077] In some examples, the first liquid return pipeline 12 includes a first liquid return sub-line and a second liquid return sub-line, the first liquid return sub-line is arranged along a first direction, the second liquid return sub-line is arranged along a second direction, and the first direction and the second direction intersect.

[0078] Exemplarily, the first direction may be Figure 1 and Figure 2 The second direction can be Figure 1 and Figure 2 In the direction from top to bottom.

[0079] For example, the first liquid return line may be Figure 1 and Figure 2 In the embodiment, the first liquid return pipeline 12 is arranged horizontally; the second liquid return sub-pipeline can be Figure 1 and Figure 2 In the figure, a first liquid return pipeline 12 is arranged vertically. Figure 1 and Figure 2 The dotted line in shows the boundary line of the first liquid return line 12.

[0080] The device also includes:

[0081] The drain pipe 9 is arranged on the first liquid return line.

[0082] The inventors have found through extensive research that the height difference of the first liquid return pipeline 12 is relatively large, and siphon break-up phenomenon is very likely to occur, resulting in unstable liquid level in the feed tank 1, thereby affecting the stability of the entire liquid delivery system.

[0083] In this example, by setting an emptying pipe on the first liquid return sub-line, that is, adding an emptying pipe on the transverse pipe of the first liquid return line, the siphon break phenomenon can be effectively improved or avoided, which is beneficial to the stability of the liquid level in the feed tank 1, thereby improving the stability of the entire liquid delivery system. In addition, adding an emptying pipe on the transverse pipe of the first liquid return line can also eliminate small bubbles in the feed pipe below, improve the accuracy of the online measurement device and the stability of the liquid delivery system.

[0084] In some embodiments, the buffer tank 5 is also connected to the feed tank 1 through a second liquid 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 liquid return line 13 .

[0086] That is, the second liquid return line 13 is arranged between the buffer tank 5 and the feed tank 1 .

[0087] In this embodiment, a second liquid return line is provided between the buffer tank and the feed tank, so that the target liquid in the buffer tank can be returned to the feed tank through the second liquid return line after being filled, 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 tank 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] That is, the feed tank 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 feed trough 1, and the first height difference between the first air lifting device 4a and the lowest point of the first sub-lifting pipeline is h1, h1 ≥ 400mm. In other words, the highest point of the first air lifting device 4a is lower than the lowest point of the feed 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 have found that the arrangement height of the first height difference h1 is related to the direction of the compressed air in the first compressed air pipe 14a. If h1 is too small, compressed air will enter the feed tank 1, and there is a risk of compressed air blowby.

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

[0093] In some embodiments, the second lifting pipeline 10b includes a third sub-lifting pipeline and a fourth sub-lifting pipeline, the third sub-lifting pipeline is connected between the buffer tank 5 and the second air lifting device 4b, and the fourth sub-lifting pipeline is connected between the second air lifting device 4b and the measurement supply tank 6;

[0094] That is, the buffer tank 5 is communicated with the second air lifting device 4 b through the third sub-lifting line, and the second air lifting device 4 b is communicated with the measurement supply tank 6 through the fourth sub-lifting line.

[0095] The height of the second air lifting device 4b is higher than the top of the feed trough 1, and the second height difference between the second air lifting device 4b and the lowest point of the fourth sub-lifting pipeline is h2, h2 ≥ 400mm. In other words, the lowest point of the second air lifting device 4b is higher than the highest point of the feed 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 have found that the arrangement height of the second height difference h2 is related to the direction of the compressed air in the second compressed air pipe 14b. If h2 is too small, compressed air will enter the feed tank 1, and there is a risk of compressed air blowby.

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

[0098] In some embodiments, the feed tank 1, the buffer tank 5, the first air lifting device 4a, the measurement supply tank 6, the second air lifting device 4b and the online measurement device 7 are all arranged in the sealed shielding container 2;

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

[0100] In this embodiment, since the feed trough, the buffer tank, the first air lifting device, the measuring supply tank, the second air lifting device and the online measuring device are all arranged in the sealed shielding container, all the conveying processes of the target liquid are completed in the sealed shielding container. The sealed shielding container is made of concrete, and the outer surface of the concrete is also covered with a shielding sealing layer, that is, shielding protection is performed by the concrete and the shielding sealing layer, and the sealing shielding effect is good, which can effectively prevent the leakage of the target liquid in the sealed shielding container and has good radiation safety performance.

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

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

[0103] The device also includes:

[0104] The inspection and maintenance portion 16 is disposed outside the sealed shielding container 2 and corresponds to the position of the online measuring device 7 , and is used to inspect and maintain the online measuring device 7 through the opening at the top of the sealed shielding container 2 .

[0105] In this embodiment, the online measuring device is arranged on the top of the sealed shielding container 2, so that the inspection unit is arranged to correspond to the position of the online measuring device, which is conducive to the inspection and maintenance of the online measuring device. In addition, by setting the inspection unit, the online measuring device can be inspected and maintained, with good radiation safety performance.

[0106] Exemplarily, the maintenance unit 16 may be a component capable of performing maintenance on the online detection device.

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

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

[0109] That is, the feed pipe 11 is provided 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, 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 inclined feeding difficulties in the liquid conveying device.

[0111] Exemplarily, the first air lifting device 4a uses the compressed air in the first compressed air pipe 14a, and the second air lifting device 4b uses the compressed air in the second compressed air pipe 14b, so that a gas-liquid mixed phase is generated in the feed pipe 11 to form a gas-liquid density difference, thereby achieving the transportation 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 bubbles, and the feed pipe 11 needs to flow back to the feed tank 1 after passing through the online measuring device 7.

[0113] It can be understood that the feed pipe 11 is a 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 the compressed air introduced into the first compressed air pipe 14a enters the first air lifting device 4a, the compressed air flow rate increases, the density difference between the two sides of the first lifting pipeline 10a increases accordingly, and the flow rate of the target liquid in the first lifting pipeline 10a also increases. Similarly, the compressed air introduced into the second compressed air pipe 14b enters the second air lifting device 4b, the compressed air flow rate increases, the density difference between the two sides of the second lifting pipeline 10b increases accordingly, and the flow rate of the target liquid in the second lifting pipeline 10b also increases.

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

[0116] A feed tank 1 and an online measuring device 7 are arranged in the first sub-container.

[0117] The second sub-container is provided with 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 located at a position higher than the position of 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 with setting the measuring supply tank and the online measuring device in the same sub-container, the arrangement height of the measuring supply tank can be raised, so that the target liquid can complete sufficient gas-liquid separation in the measuring supply tank, there are no bubbles in the feed pipe, and the target liquid is fully transported to the online measuring device, thereby providing a basis for 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 through 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, 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 ≥400 mm, the length dimension of the online measuring device can be compressed from the perspective of layout, thereby saving costs.

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

[0123] In this example, by setting the distance M between the outlet of the online measuring device 7 and the highest point of the feed pipe 11 to be ≥2m, the target liquid can complete sufficient gas-liquid separation in the measuring supply tank, there are no 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 apparatus further includes:

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

[0126] In this example, considering that different types of liquid feeds are transported by the same liquid feed conveying device, flushing water can be introduced through a flushing pipe to flush the entire liquid feed conveying device before replacing other types of target liquid feeds for liquid feed conveying.

[0127] In some examples, a space accessible to operators may be provided above the online measuring device 7. When the online measuring device 7 needs to be inspected and maintained, the operator enters through the door 18, covers the inspection section 16 above the online measuring device 7, and lifts the online measuring device 7 using the crane 17 to complete the inspection and maintenance operations on the online measuring device 7.

[0128] In some examples, the liquid material conveying device may further include an equipment support 15 for supporting the material supply trough 1 .

[0129] The working process of the liquid conveying device provided in the embodiment of the present application is described below. Figure 1 and Figure 2 As shown, the target liquid in the feed tank 1 first passes through the first lifting pipeline 10a, and then 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 feed 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 then 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 itself through the feed pipe 11 to the online measuring device 7, the online measuring device 7 is used to measure the target liquid, and the measured target liquid flows back to the feed tank 1 through the first return liquid pipeline 12.

[0130] In order to better understand the liquid conveying device provided in the embodiment of the present application, a more specific implementation is described below.

[0131] like Figure 1 and Figure 2 As shown, the embodiment of the present application uses a two-stage air lifting device to transport the high-radioactivity material (i.e., the target liquid) in the feed tank 1 to the online measuring device 7, and the online measuring device 7 returns the high-radioactivity material to the feed tank 1 after monitoring.

[0132] The high-level radioactive materials are transported, and all the transporting processes are completed in the sealed shielding box (i.e., the sealed shielding container 2). The online measuring device 7 is arranged on the top of the sealed box (i.e., the sealed shielding container 2), and an inspection and maintenance plan is set for the online measuring device 7.

[0133] The air lifting device of the feed pipe 11 (i.e., the first air lifting device 4a and the second air lifting device 4b) generates a gas-liquid mixed phase in the feed pipe 11 through the compressed air in the compressed air pipe (i.e., the first compressed air pipe 14a and the second compressed air pipe 14b) to form a gas-liquid density difference, thereby achieving the transportation of high-release materials.

[0134] The flow rate of the air lifting device is monitored by introducing compressed air of different flow rates into the compressed air pipe, and the different density differences on both sides of the feeding pipe (i.e., the first lifting pipeline 10a and the second lifting pipeline 10b) cause the flow rate of the liquid lifting in the feeding pipe to be different.

[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 the h value is related to the direction of the compressed air in the compressed air pipe. If the h value is too small, compressed air will enter the feed trough 1, and there is a risk of compressed air blowby. In the embodiment of the present application, optionally, h≥400mm (i.e., h1≥400mm, h2≥400mm) can effectively prevent compressed air blowby.

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

[0137] The high-level material in the feed tank 1 is first lifted to the first tank (i.e., buffer tank 5) by an air lifting device through a feed pipe, and then flows back to the feed tank 1 through an overflow pipe (i.e., second liquid return line 13) after the first tank overflows. At this time, the liquid level in the first tank is stable and constant, and then the feed is lifted to the second tank (i.e., measurement supply tank 6) by an air lifting device through a feed pipe.

[0138] The liquid feed in the second tank flows by itself to the online measuring device 7 , and the liquid feed monitored by the online measuring device 7 flows back to the feed tank 1 through a reflux pipe (ie, the first liquid reflux line 12 ).

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

[0140] The online measuring device 7 is arranged with the requirement of precise monitoring. The feed pipe 11 needs to be tilted for feeding, the high-level material in the feed pipe needs to be filled with the material without bubbles, and the feed pipe needs to flow back to the feed tank 1 after passing through the online measuring device 7.

[0141] The arrangement position of the second tank is closely related to the length of the equipment of the online measuring device 7. The feed pipe 11 is the discharge pipe of the second tank, and the conveying power of the feed liquid is gravity flow.

[0142] The second tank and the online measuring device 7 are arranged in separate rooms, the arrangement height of the second tank is raised, and the position of the feed pipe 11 passing through the wall at an angle g≥400mm. The embodiment of the present application optimizes the arrangement scheme, and from the perspective of arrangement, the length of the online measuring device 7 is compressed, which is conducive to cost saving.

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

[0144] The height difference of the reflux pipe is large, and siphon break phenomenon is very likely to occur, resulting in unstable liquid level in the feed tank 1, thereby affecting the stability of the entire liquid circulation and transportation system. The embodiment of the present application optimizes the layout scheme, and adding an emptying pipe 9 to the horizontal pipe of the reflux pipe can effectively avoid the siphon break phenomenon, and at the same time, it can also eliminate the tiny bubbles in the feed pipe 11, thereby improving the accuracy of monitoring and the stability of liquid circulation.

[0145] The present application also considers that the same liquid circulation system is used to transport different types of liquids. The flushing pipe 8 can be used to pass flushing water to flush the entire liquid circulation system (i.e., liquid conveying device), and then other types of liquids can be replaced for liquid conveying.

[0146] Inspection and maintenance of high-level radioactive materials must focus on radiation protection safety. The online measuring device can be inspected and maintained by a special inspection container (i.e., the inspection unit 16).

[0147] A space accessible to operators is provided above the online measuring device 7. When the online measuring device 7 needs to be inspected and maintained, the operator enters through the door 18, covers the inspection container 16 above the online measuring device 7, and lifts it with the crane 17 to complete the inspection and maintenance operation of the online measuring device 7.

[0148] The embodiment of the present application provides a liquid circulation conveying system (i.e., liquid conveying device) for an online measurement device for high-radioactive materials, which conveys the high-radioactive materials in a feed tank 1 to an online measurement device 7, and returns the high-radioactive materials to the feed tank 1 after the online measurement device 7 completes monitoring.

[0149] The high-radiation material is transported, and all the transporting processes are completed in a sealed shielding box (i.e., sealed shielding container 2). The sealed shielding box adopts two layers of shielding protection, namely, concrete and a sealing layer (i.e., shielding sealing layer 3), and has a good sealing shielding effect, which can prevent the leakage of the high-radiation liquid in the shielding box.

[0150] The conveying device is an air lifting device. The conveying device uses 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 compressed air pipe into the air lifting device. The flow rate of compressed air increases, and the density difference on both sides of the feeding pipe increases accordingly, and the flow rate of the liquid in the feeding pipe also increases. Exemplarily, the pressure range of the compressed air can be [0.4, 0.6] Mpa.

[0151] Flow monitoring of the air lift and its position in relation to the feed pipe.

[0152] Flow monitoring of the air lifting device. Compressed air of different flow rates is introduced into the compressed air pipe. The different density differences on both sides of the feeding pipe will cause different flow rates of liquid lifting in the feeding pipe.

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

[0154] The high-level material in the feed tank 1 is first lifted to the first tank through the feed pipe by the air lift device, and then flows back to the feed tank 1 through the overflow pipe after the first tank overflows. At this time, the liquid level in the first tank is stable and constant, and then the feed liquid is lifted to the second tank through the feed pipe by the air lift device;

[0155] The liquid feed in the second tank flows by itself to the online measuring device 7 , and the liquid feed monitored by the online measuring device 7 flows back to the feed tank 1 through a reflux pipe (ie, the first liquid reflux line 12 ).

[0156] When the liquid in the second tank flows to the online measuring device 7, the feed pipe 11 is tilted upward, which can effectively reduce the liquid bubbles in the feed pipe 11 and improve the accuracy of monitoring. The key point is that the highest point of the feed pipe 11 should not be higher than the lowest point of the second tank;

[0157] At the same time, there is a large height difference between the online measuring device 7 and the feed trough 1, and siphoning is likely to occur when the reflux pipe refluxes. The addition of the drain pipe 9 can effectively avoid siphoning and can also drain the bubbles in the feed pipe 11.

[0158] Example 2

[0159] The present application also provides a high discharge liquid processing system, which is characterized by comprising:

[0160] Concentrator, used to concentrate the liquid generated by the nuclear power plant to form high-release liquid;

[0161] The liquid conveying device as in any one of the embodiments 1, has its input end connected with the concentrator, and is used to receive the high discharge liquid output by the concentrator, measure the high discharge liquid, and output the measured high discharge liquid.

[0162] Illustratively, the feed liquid produced by the nuclear power plant may include the feed liquid produced during the post-processing process.

[0163] The high-release liquid processing system provided in the embodiment of the present application includes the liquid conveying device of any one of Embodiment 1, that is, it has the beneficial effects and implementation methods of the liquid conveying device provided in Embodiment 1 of the present application. For details, please refer to the specific description of the liquid conveying device in the above Embodiment 1, which will not be repeated in this embodiment.

[0164] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present application, but the present 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 the present application, and these modifications and improvements are also considered to be within the scope of protection of the present application.

Claims

1. A liquid conveying device, characterized in that: include: A feed tank (1) for loading target liquid; A buffer tank (5) is connected to the feed tank (1) via a first lifting pipeline (10a), and the height of the buffer tank (5) is higher than the height of the feed tank (1); A first air lifting device (4a), arranged on the first lifting pipeline (10a), used for transferring the target liquid in the feed tank (1) to the buffer tank (5) via the first lifting pipeline (10a); A measuring supply tank (6), which is connected to the buffer tank (5) via a second lifting pipeline (10b) and has a height higher than that of the buffer tank (5); a second air lifting device (4b), arranged on the second lifting pipeline (10b), and used for transmitting the target liquid in the buffer tank (5) to the measurement 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), wherein the first end of the online measuring device (7) 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).

2. The device according to claim 1, characterized in that The second end of the online measuring device (7) is connected to the feed tank (1) via a first liquid return line (12). After being measured, the target liquid in the measuring supply tank (6) can be returned to the feed tank (1) through the first liquid return line (12).

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

4. The device according to claim 1, characterized in that The buffer tank (5) is also connected to the feed tank (1) via a second liquid 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 liquid return pipeline (13).

5. The device according to claim 1, characterized in that The first lifting pipeline (10a) comprises a first sub-lifting pipeline and a second sub-lifting pipeline, wherein the first sub-lifting pipeline is connected between the feed tank (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 feed tank (1), and the first height difference between the first air lifting device (4a) and the lowest point of the first sub-lifting pipeline is h1, h1≥400mm; and / or, The second lifting pipeline (10b) comprises a third sub-lifting pipeline and a fourth sub-lifting pipeline, the third sub-lifting pipeline is connected between the buffer tank (5) and the second air lifting device (4b), and the fourth sub-lifting pipeline is connected between the second air lifting device (4b) and the measurement supply tank (6); The height of the second air lifting device (4b) is higher than the top of the feed trough (1), and the second height difference between the second air lifting device (4b) and the lowest point of the fourth sub-lifting pipeline is h2, where h2≥400mm.

6. The device according to claim 1, characterized in that The feed trough (1), the buffer tank (5), the first air lifting device (4a), the measurement supply tank (6), the second air lifting device (4b) and the online measurement device (7) are all arranged in a sealed shielding container (2); The sealed shielding container (2) is made of concrete, and the outside of the concrete is also covered with a shielding sealing layer (3).

7. The device according to claim 6, characterized in that The online measuring device (7) is arranged on the top of the sealed shielding container (2); The device also includes: The inspection and maintenance section (16) is arranged outside the sealed shielding container (2) and corresponds to the position of the online measuring device (7), and is used to inspect and maintain the online measuring device (7) through the opening at the top of the sealed shielding container (2).

8. The device 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 a feed pipe (11); Wherein, the highest point of the feed pipe (11) is lower than the lowest point of the measurement supply tank (6).

9. The device according to claim 6, characterized in that The sealed shielding container (2) comprises a first sub-container and a second sub-container adjacent thereto, wherein the height of the first sub-container is smaller than the height of the second sub-container; The first sub-container is provided with the feed tank (1) and the online measuring device (7); The second sub-container is provided with the buffer tank (5), the first air lifting device (4a), the measuring supply tank (6) and the second air lifting device (4b); the measuring supply tank (6) is located at a position higher than the online measuring device (7).

10. The device according to claim 9, characterized in that The device also includes: The first end of the online measuring device (7) is connected to the measuring supply tank (6) through a feed pipe (11); The distance between the highest point of the feed pipe (11) and the top of the first sub-container is g, and g≥400 mm.

11. The device according to claim 10, characterized in that The distance between the outlet of the online measuring device (7) and the highest point of the feed pipe (11) is M, M≥2m.

12. A high discharge liquid processing system, characterized in that: include: Concentrator, used to concentrate the liquid generated by the nuclear power plant to form high-release liquid; The liquid conveying device according to any one of claims 1 to 11, wherein the input end is connected to the concentrator, and is used to receive the high-discharge liquid output by the concentrator, measure the high-discharge liquid, and output the measured high-discharge liquid.

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