Test device and test method for orifice corrosion product deposition

Abstract

The application discloses a testing device and a testing method for orifice corrosion product deposition. The device comprises a plurality of annular test electrodes, an inlet connecting pipe, an outlet connecting pipe, a plurality of wires and a processing module. The plurality of annular test electrodes are arranged in a stack to form an annular test electrode group, and the annular test electrode group comprises a solution introduction orifice. The inlet connecting pipe is connected to one end of the annular test electrode group, and the outlet connecting pipe is connected to the other end of the annular test electrode group. The solution flows into the inlet connecting pipe, passes through the orifice and the outlet connecting pipe, and flows out. Each wire is connected to a corresponding annular test electrode. The processor is used to obtain a first resistance value of the solution and a second resistance value between adjacent annular test electrodes, and obtain deposition information of corrosion products when the corrosion products carried by the solution flow through the orifice based on the first resistance value and the second resistance value. Through the technical scheme, the corrosion product deposition information of the orifice can be obtained.

Description

Technical Field

[0001] This application relates to the technical field of high-temperature gas-cooled reactors, and particularly to a test device and a test method for corrosion product deposition in throttle holes. Background Art

[0002] In the related art, in order to ensure uniform solution flow velocity in a high-temperature gas-cooled reactor, a throttle component is installed at the inlet of the secondary circuit side of the steam generator of the high-temperature gas-cooled reactor. Corrosion products generated by electrochemical corrosion may deposit in the throttle holes, resulting in blockage and causing the occurrence of water wall tube explosion accidents. Currently, experimental research on the problem of corrosion product deposition in the throttle holes of high-temperature gas-cooled reactor steam generators is still blank. There is not only a lack of experimental equipment to achieve high-temperature, high-pressure, and high-flow velocity environments, but a research system matching the research method still有待开发. Summary of the Invention

[0003] This application provides a test device and a test method for corrosion product deposition in throttle holes. It can perform simulation tests on the product deposition of the throttle component of a high-temperature gas-cooled reactor to obtain corrosion product deposition information in the throttle holes.

[0004] In a first aspect, an embodiment of this application provides a test device, including: a plurality of annular test electrodes, an inlet connecting pipe, an outlet connecting pipe, a plurality of wires, and a processing module. Among them, the plurality of annular test electrodes are stacked and arranged to form an annular test electrode group, and the annular test electrode group includes the solution-introducing throttle holes; the inlet connecting pipe is connected to one end of the annular test electrode group; the outlet connecting pipe is connected to the other end of the annular test electrode group, where the solution flows in from the inlet connecting pipe, passes through the throttle holes and the outlet connecting pipe and flows out; each wire is respectively connected to the corresponding annular test electrode; the processor is connected to the wire, and the processor is used to obtain the first resistance value of the solution between adjacent annular test electrodes and the second resistance value between adjacent annular test electrodes, and based on the first resistance value and the second resistance value, obtain the deposition information of the corrosion products when the corrosion products carried by the solution flow through the throttle holes.

[0005] Through the device of the embodiment of this application, simulation research on corrosion product deposition in throttle holes can be carried out to obtain corrosion product deposition information.

[0006] In an implementation manner, the annular test electrode group further includes at least one small hole gasket, and the small hole gasket is arranged between adjacent two annular test electrodes.

[0007] In one implementation, the device further includes a first large-hole sealing gasket and a second large-hole sealing gasket, wherein the first large-hole sealing gasket is disposed at the connection between the inlet connecting pipe and the annular test electrode assembly; and the second large-hole sealing gasket is disposed at the connection between the annular test electrode assembly and the outlet connecting pipe.

[0008] In one implementation, the device further includes an electrode insulating sleeve, the inner wall of which is sequentially fitted with the inlet connecting pipe, the annular test electrode group, and the outlet connecting pipe.

[0009] In one optional implementation, the device further includes a through-bolt and a clamping nut, wherein the inner wall of the through-bolt is sequentially fitted with the electrode insulating sleeve and the outlet connecting pipe; and the inner wall of the clamping nut is sequentially fitted with the inlet connecting pipe and the through-bolt.

[0010] Optionally, the electrode insulating sleeve and the through-hole clamping bolt are provided with communicating through holes, through which the wire can pass.

[0011] Secondly, embodiments of this application provide a test method for the deposition of corrosion products in throttling holes. The method is implemented based on the test apparatus described in the first aspect. The method includes: obtaining a first resistance value of the solution between two adjacent annular test electrodes; obtaining a second resistance value between adjacent annular test electrodes in the annular test electrode group; and obtaining throttling hole corrosion product deposition information based on the first resistance value and the second resistance value.

[0012] In this technical solution, the first resistance value of the solution between adjacent annular test electrodes can be obtained based on the testing device provided in the embodiments of this application, and the second resistance value between adjacent annular test electrodes in the annular test electrode group can be obtained, thereby obtaining the deposition information of throttling hole corrosion products based on the first resistance value and the second resistance value. This enables simulation research on the deposition of throttling hole corrosion products.

[0013] In one implementation, the method further includes: S1, adjusting the current temperature and / or current flow rate of the solution; S2, acquiring the current electrode potential of a preset region in the testing device; S3, repeating steps S1 and S2 to acquire the variation law of the electrode potential of the preset region with solution temperature and / or solution flow rate.

[0014] Thirdly, embodiments of this application provide a testing apparatus for the deposition of corrosion products in throttling orifices, comprising: a first acquisition module for acquiring a first resistance value of a solution between two adjacent annular test electrodes; a second acquisition module for acquiring a second resistance value between two adjacent annular test electrodes; and a processing module for acquiring throttling orifice corrosion product deposition information based on the first resistance value and the second resistance value.

[0015] Fourthly, embodiments of this application provide a computer-readable storage medium for storing instructions that, when executed, cause the method described in the second aspect to be implemented.

[0016] Fifthly, embodiments of this application provide a computer program product, including a computer program that, when executed by a processor, implements the steps of the test method for the deposition of corrosion products in throttling holes as described in the second aspect.

[0017] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this application, nor is it intended to limit the scope of this application. Other features of this application will become readily apparent from the following description. Attached Figure Description

[0018] The accompanying drawings are provided for a better understanding of this solution and do not constitute a limitation of this application. Wherein:

[0019] Figure 1a This is a schematic diagram of the structure of a testing device provided in an embodiment of this application;

[0020] Figure 1b This is a schematic diagram of another testing device provided in an embodiment of this application;

[0021] Figure 2 This is a schematic diagram of a test method for the deposition of corrosion products in a throttling orifice provided in an embodiment of this application;

[0022] Figure 3 This is a schematic diagram of a test apparatus for the deposition of corrosion products in a throttling orifice, provided in an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of another test apparatus for the deposition of corrosion products in throttling holes provided in an embodiment of this application. Detailed Implementation

[0024] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of this application, including various details to aid understanding. These should be considered merely exemplary. Therefore, those skilled in the art will recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of this application. Similarly, for clarity and brevity, descriptions of well-known functions and structures are omitted in the following description.

[0025] In the description of this application, unless otherwise stated, " / " means "or", for example, A / B can mean A or B; "and / or" in this document 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 alone, A and B simultaneously, and B alone. The various numerical designations such as "first", "second", etc., involved in this application are only for the convenience of description and are not used to limit the scope of the embodiments of this application, nor do they indicate the order of events.

[0026] It should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Please see Figure 1a , Figure 1a This is a schematic diagram of the structure of a testing device provided in an embodiment of this application. Figure 1a As shown, the device includes multiple annular test electrodes 101, an inlet connecting pipe 102, an outlet connecting pipe 103, multiple wires 104, and a processing module 105. The multiple annular test electrodes 101 are stacked to form an annular test electrode group, which includes a solution inlet throttling orifice. The inlet connecting pipe 102 is connected to one end of the annular test electrode group; the outlet connecting pipe 103 is connected to the other end of the annular test electrode group. Solution flows in from the inlet connecting pipe 102 and flows out through the throttling orifice and the outlet connecting pipe 103. Each wire 104 is connected to a corresponding annular test electrode 101. The processor is used to acquire a first resistance value of the solution between adjacent annular test electrodes 101 and a second resistance value between adjacent annular test electrodes 101, and based on the first and second resistance values, acquire information on the deposition of corrosion products carried by the solution as they flow through the throttling orifice.

[0028] It is understood that multiple annular test electrodes 101 can be stacked to form an annular test electrode group, and adjacent annular test electrodes 101 are insulated from each other under normal conditions. Each annular test electrode 101 has a through-hole on its surface, and these through-holes are interconnected to simulate a throttling orifice. An inlet connecting pipe 102 is connected to one end of the annular test electrode group, and an outlet connecting pipe 103 is connected to the other end of the annular test electrode group, allowing the solution to flow into the test device from the inlet connecting pipe 102, pass through the throttling orifice, and finally exit the test device through the outlet connecting pipe 103. Each wire 104 is connected to its corresponding annular test electrode 101 to obtain relevant data for that annular test electrode 101. The processor can obtain the first resistance value of the solution and the second resistance value between adjacent annular test electrodes 101, thereby obtaining information on the deposition of corrosion products carried by the solution as they flow through the throttling orifice based on the first and second resistance values.

[0029] In one embodiment of this application, the testing device includes three ring-shaped test electrodes 101 as an example.

[0030] In some embodiments of this application, the wires may be covered with polytetrafluoroethylene heat shrink tubing.

[0031] In some embodiments of this application, the conductor can be a conductor post.

[0032] In the embodiments of this application, the deposition information of corrosion products includes the deposition rate of corrosion products.

[0033] In one implementation, the aforementioned annular test electrode assembly further includes at least one small-hole sealing gasket 106, with the small-hole sealing gasket 106 disposed between two adjacent annular test electrodes 101. As an example, please refer to... Figure 1b , Figure 1b This is a schematic diagram of another testing device provided in an embodiment of this application. For example... Figure 1b As shown, the area of ​​the small hole sealing gasket is the same as that of the ring test electrode, and the through hole on the small hole sealing gasket 106 is the same size as the through hole on the ring test electrode.

[0034] In the embodiments of this application, the test device includes two small hole sealing gaskets 106 as an example.

[0035] In some embodiments of this application, the small hole sealing gasket 106 may be made of polytetrafluoroethylene.

[0036] It is understood that the small hole sealing gasket 106 has a through hole, which is connected to the through hole on the annular test electrode 101. Thus, by setting the small hole sealing gasket 106 between two adjacent annular test electrodes 101, the adjacent annular test electrodes 101 can be insulated from each other without obstructing the flow of solution, and at the same time, it can play a sealing role to prevent the solution from leaking between the two adjacent annular test electrodes 101.

[0037] In one implementation, the above-mentioned device further includes a first large-hole sealing gasket 107 and a second large-hole sealing gasket 108, wherein the first large-hole sealing gasket 107 is disposed at the connection between the inlet connecting pipe 102 and the annular test electrode group; and the second large-hole sealing gasket 108 is disposed at the connection between the annular test electrode group and the outlet connecting pipe 103.

[0038] It is understood that the contact area of ​​the first large-hole sealing gasket 107 is the same as that of the inlet connecting pipe 102, and the first large-hole sealing gasket 107 is disposed at the connection between the inlet connecting pipe 102 and the annular test electrode assembly to prevent leakage of the solution from the connection between the inlet connecting pipe 102 and the annular test electrode assembly when the solution flows through the test device; the contact area of ​​the second large-hole sealing gasket 108 is the same as that of the inlet connecting pipe 103, and the second large-hole sealing gasket 108 is disposed at the connection between the annular test electrode assembly and the outlet connecting pipe 103 to prevent leakage of the solution from the connection between the outlet connecting pipe 103 and the annular test electrode assembly when the solution flows through the test device.

[0039] In some embodiments of this application, the first large-hole sealing gasket 107 and the second large-hole sealing gasket 108 may be made of polytetrafluoroethylene.

[0040] In one implementation, the device further includes an electrode insulating sleeve 109, the inner wall of which is sequentially fitted with an inlet connecting pipe 102, an annular test electrode group, and an outlet connecting pipe 103.

[0041] It is understood that the inner wall of the electrode insulating sleeve 109 is sequentially connected to the outer surfaces of the inlet connecting pipe 102, the annular test electrode group, and the outlet connecting pipe 103, and the inlet connecting pipe 102, the annular test electrode group, and the outlet connecting pipe 103 are connected in accordance with the manner provided in any of the above embodiments, so that the electrode insulating sleeve 109 can insulate the annular test electrode 101 from other components connected to the outer wall of the electrode insulating sleeve.

[0042] In one implementation, the device further includes a through-bolt 110 and a clamping nut 111, wherein an electrode insulating sleeve 109 and an outlet connecting pipe 103 are sequentially sleeved on the inner wall of the through-bolt 110; and an inlet connecting pipe 102 and a through-bolt 110 are sequentially sleeved on the inner wall of the clamping nut 111.

[0043] It is understood that the inner wall of the through-bolt 110 is sequentially connected to the outer surfaces of the electrode insulating sleeve 109 and the outlet connecting pipe 103. Thus, the through-bolt 110 can apply pressure to the protrusions on the outer walls of the inlet connecting pipe 102 and the outlet connecting pipe 103, thereby compressing the small-hole sealing gasket 106, the first large-hole sealing gasket 107, and the second large-hole sealing gasket 108, achieving a seal between the inlet connecting pipe 102, the annular test electrode 101, and the outlet connecting pipe 103. The inner wall of the clamping nut 111 is sequentially fitted with the inlet connecting pipe 102 and the through-bolt 110, and the clamping nut 111 and the through-bolt 110 can be connected by threads, allowing the clamping nut to apply pressure to the through-bolt.

[0044] Optionally, the surfaces of the through-hole clamping bolt 110 and the electrode insulating sleeve 109 are respectively provided with through holes, through which the wire 104 can pass.

[0045] It is understood that the through-holes on the surfaces of the through-bolt 110 and the electrode insulating sleeve 109 allow the wire 104 connected to the annular test electrode 101 to pass through the through-holes from the through-bolt and the electrode insulating sleeve 109.

[0046] The apparatus of this application embodiment can be used to conduct simulation studies on the deposition of corrosion products in throttling holes in order to obtain information on the deposition of corrosion products in throttling holes.

[0047] Please see Figure 2 , Figure 2 This is a schematic diagram of a testing method for the deposition of corrosion products in throttling orifices provided in an embodiment of this application. This method is implemented based on the testing apparatus provided in any embodiment of this application. Figure 2 As shown, the method may include, but is not limited to, the following steps:

[0048] Step S201: Obtain the first resistance value of the solution between adjacent ring test electrodes.

[0049] For example, the resistance of the solution between adjacent ring test electrodes is measured by electrochemical impedance spectroscopy and used as the first resistance value.

[0050] Step S202: Obtain the second resistance value between adjacent ring test electrodes.

[0051] For example, the resistance between adjacent ring test electrodes in a ring test electrode group is measured using the linear polarization method and used as a second resistance value.

[0052] Step S203: Obtain the deposition information of corrosion products in the throttling hole based on the first resistance value and the second resistance value.

[0053] For example, subtracting the first resistance value from the second resistance value yields the third resistance value of the film layer on the surfaces of two adjacent electrodes, thereby allowing information on the deposition of corrosion products in the throttling holes to be obtained based on the third resistance value.

[0054] It is understandable that when the testing device includes multiple sets of adjacent annular test electrodes, multiple corrosion product information can be obtained separately using the above method, and the multiple corrosion product information can be comprehensively analyzed to obtain the throttling hole corrosion product deposition information.

[0055] As an example, the testing device in the foregoing embodiment of this application includes three annular test electrodes. The three annular test electrodes can form two adjacent sets of annular test electrodes, which can measure two sets of resistance data. Each set of resistance data includes a first resistance value and a corresponding second resistance value. Thus, based on each set of resistance data, two corresponding third resistance values ​​can be obtained, thereby obtaining two deposition information items. Based on the comprehensive analysis of the two deposition information items, the deposition information of the throttling hole corrosion products can be obtained.

[0056] In the embodiments of this application, the corrosion product deposition information includes the corrosion product deposition rate.

[0057] By implementing the embodiments of this application, a first resistance value of the solution between adjacent annular test electrodes can be obtained based on the testing device provided in the embodiments of this application, and a second resistance value between adjacent annular test electrodes in the annular test electrode group can be obtained, thereby obtaining the deposition information of throttling orifice corrosion products based on the first resistance value and the second resistance value. This enables simulation research on the deposition of throttling orifice corrosion products.

[0058] In some embodiments of this application, the above method may further include the following steps: S1, adjusting the current temperature and / or current flow rate of the solution; S2, obtaining the current electrode potential of a preset area in the testing device; S3, repeating steps S1 and S2 to obtain the variation law of the electrode potential of the preset area with the solution temperature and / or solution flow rate.

[0059] In the embodiments of this application, the preset area can be the area near the throttle orifice.

[0060] As an example, the current temperature of the solution is adjusted, and then the first electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes; then the above steps are repeated to adjust the current temperature of the solution again, and the second electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes; thus, the electrode potentials of the preset region corresponding to different solution temperatures are obtained, thereby obtaining the variation law of the electrode potential of the preset region with solution temperature and / or solution flow rate.

[0061] As another example, the current flow rate of the solution is adjusted, and then the first electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes; then the above steps are repeated to adjust the current flow rate of the solution again, and the second electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes; thus, the electrode potentials corresponding to the preset region under different solution flow rates are obtained, thereby obtaining the variation law of the electrode potential of the preset region with the solution flow rate.

[0062] As another example, the current temperature and flow rate of the solution are adjusted, and then the first electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes. Then, the above steps are repeated to adjust the current temperature and flow rate of the solution again, and the second electrode potential of the preset region of the throttling orifice is obtained by measuring the open circuit potential of the two electrodes. Thus, the electrode potentials of the preset region under different solution temperatures and flow rates are obtained, thereby obtaining the variation law of the electrode potential of the preset region with solution temperature and solution flow rate.

[0063] By implementing the embodiments of this application, the current temperature and / or current flow rate of the solution can be adjusted, and the corresponding electrode potential can be obtained. This allows for the simulation of the orifice environment under different flow rates and temperatures, and the conduct of electrochemical studies within the simulated environment.

[0064] Please see Figure 3 , Figure 3 This is a schematic diagram of a test apparatus for the deposition of corrosion products in a throttling orifice, provided in an embodiment of this application. Figure 3 As shown, the device 300 includes a first acquisition module, a second acquisition module, and a processing module. The first acquisition module 301 is used to acquire a first resistance value of the solution between two adjacent annular test electrodes; the second acquisition module 302 is used to acquire a second resistance value between two adjacent annular test electrodes; and the processing module 303 is used to acquire orifice corrosion product deposition information based on the first and second resistance values.

[0065] In one implementation, the above-described apparatus further includes an adjustment module, a third acquisition module, and a fourth acquisition module. As an example, please refer to... Figure 4 , Figure 4 This is a schematic diagram of another test apparatus for the deposition of corrosion products in throttling orifices provided in an embodiment of this application. Figure 4 As shown, the device 400 further includes an adjustment module 404 for adjusting the current temperature and / or current flow rate of the solution; a third acquisition module 405 for acquiring the current electrode potential of a preset area in the testing device; and a fourth acquisition module 406 for acquiring the variation of the electrode potential of the preset area with the solution temperature and / or solution flow rate. Figure 4 Modules 401-403 in Figure 3 Modules 301 to 303 in the series have the same structure and function.

[0066] The apparatus of this application embodiment can obtain a first resistance value of the solution between adjacent annular test electrodes and a second resistance value between adjacent annular test electrodes in the annular test electrode group based on the testing apparatus provided in this application embodiment, thereby obtaining information on the deposition of corrosion products in the throttling orifice based on the first and second resistance values. This enables simulation research on the deposition of corrosion products in the throttling orifice.

[0067] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0068] Based on embodiments of this application, this application also provides a computer-readable storage medium, wherein computer instructions are configured to cause a computer to execute a test method for the deposition of throttling orifice corrosion products according to any of the foregoing embodiments provided in this application.

[0069] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this application can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this application can be achieved, and this is not limited herein.

[0070] The specific embodiments described above do not constitute a limitation on the scope of protection of this application. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A test device, characterized by The device comprises a plurality of annular test electrodes, an inlet connecting pipe, an outlet connecting pipe, a plurality of wires and a processing module, wherein, The plurality of annular test electrodes are arranged in a superimposed manner to form an annular test electrode group, the annular test electrode group comprises a solution introduction throttle hole; wherein, a through hole is formed on the surface of each annular test electrode, and the through holes are in communication with each other to simulate the throttle hole; The inlet connecting pipe is connected to one end of the annular test electrode group; The outlet connecting pipe is connected to the other end of the annular test electrode group, wherein the solution flows in from the inlet connecting pipe, passes through the throttle hole and flows out through the outlet connecting pipe; Each wire is connected to a corresponding annular test electrode; The processing module is connected to the wires, and the processing module is used to obtain a first resistance value of the solution between adjacent annular test electrodes and a second resistance value between adjacent annular test electrodes, and based on the first resistance value and the second resistance value, obtain deposition information of corrosion products carried by the solution when the corrosion products flow through the throttle hole.

2. The apparatus of claim 1, wherein, The annular test electrode group further comprises at least one small hole sealing gasket, and the small hole sealing gasket is arranged between two adjacent annular test electrodes.

3. The apparatus of claim 1, wherein, The device further comprises a first large hole sealing gasket and a second large hole sealing gasket, wherein, The first large hole sealing gasket is arranged at the connection between the inlet connecting pipe and the annular test electrode group; The second large hole sealing gasket is arranged at the connection between the annular test electrode group and the outlet connecting pipe.

4. The apparatus of claim 1, wherein, The device further comprises an electrode insulation sleeve, and the inner wall of the electrode insulation sleeve is sequentially sleeved with the inlet connecting pipe, the annular test electrode group and the outlet connecting pipe.

5. The apparatus of claim 4, wherein, The device further comprises a through-hole compression bolt and a compression nut, wherein, The inner wall of the through-hole compression bolt is sequentially sleeved with the electrode insulation sleeve and the outlet connecting pipe; The inner wall of the compression nut is sequentially sleeved with the inlet connecting pipe and the through-hole compression bolt.

6. The apparatus of claim 5, wherein, The electrode insulation sleeve and the through-hole compression bolt are provided with through holes in communication, and the wires are passed out of the through holes.

7. A method of testing orifice corrosion product deposition, characterized by, The method is implemented based on the test device according to any one of claims 1 to 6, and the method comprises: obtaining a first resistance value of the solution between two adjacent annular test electrodes; obtaining a second resistance value between two adjacent annular test electrodes; obtaining throttle hole corrosion product deposition information based on the first resistance value and the second resistance value.

8. The method of claim 7, wherein, The method further comprises: S1, adjusting the current temperature and / or current flow rate of the solution; S2, obtaining the current electrode potential of a preset region in the test device; S3, repeating steps S1 and S2 to obtain the change rule of the electrode potential of the preset region with the solution temperature and / or the solution flow rate.

9. A computer readable storage medium storing instructions, wherein, When the instructions are executed, the method according to claim 7 or 8 is implemented.

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