Supercritical carbon dioxide cooling system and pipeline corrosion damage control method
By setting up corrosion damage control devices in supercritical carbon dioxide cooling pipelines and using dry ice injection technology to monitor and control the corrosion damage rate in real time, the problem of insufficient control of pipeline corrosion damage in the existing technology is solved, significantly extending the service life of the pipeline And improve reliability.
Patent Information
- Application Number
- CN202010467782.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-05-28
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2040-05-28
AI Technical Summary
The prior art lacks effective methods to control corrosion damage of supercritical carbon dioxide cooling pipelines, resulting in shortening of pipeline service life and reduced reliability.
By setting up corrosion damage control devices in the cooling pipeline, including dry ice delivery pipeline and real-time monitoring device, the corrosion damage rate is monitored, and dry ice is injected into the pipeline when the rate exceeds the preset value to reduce the corrosion damage rate.
It effectively controls the corrosion damage development of supercritical carbon dioxide cooling pipelines, extends the service life of the pipelines, and improves its reliability.
Smart Images
Figure CN111678983B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of supercritical carbon dioxide pipelines, and in particular to a supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof. Background Art
[0002] Supercritical fluid refers to a fluid whose temperature and pressure are above the critical point, and has many unique properties. Carbon dioxide is non-toxic and has good physical and chemical properties. Its proportion in the air is 0.3%, and its critical temperature is as low as 31.2°C and its critical pressure is moderate at 72.9atm. When carbon dioxide is in a supercritical state, it has the dual properties of gas and liquid, with a density close to that of liquid (about 200-800 times the density of air), and a viscosity and diffusion coefficient close to that of gas (about 100 times that of liquid), and has better fluidity and transmission characteristics.
[0003] In recent years, the use of supercritical carbon dioxide fluid for cooling has gained attention. When low-pressure carbon dioxide gas is pressurized to above the critical pressure through a booster system and heated to above the critical temperature, carbon dioxide can be in a supercritical state. Due to the rapid pressure drop of the supercritical carbon dioxide fluid, it absorbs heat and expands instantly, thus achieving an instantaneous low temperature effect.
[0004] The pipes in the supercritical carbon dioxide cooling system will suffer from corrosion damage during use. The existing treatment methods for corrosion damage of supercritical carbon dioxide cooling pipes are mostly corrosion prevention and post-corrosion damage treatment, but there is a lack of means to control the corrosion of cooling pipes. Summary of the invention
[0005] The embodiment of the present invention provides a supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof, which are used to solve or partially solve the problem that the existing treatment of supercritical carbon dioxide cooling pipeline corrosion damage lacks a cooling pipeline corrosion control method.
[0006] An embodiment of the present invention provides a supercritical carbon dioxide cooling system, including a cooling pipeline, and also including a corrosion damage control device for controlling corrosion damage of the cooling pipeline. The corrosion damage control device includes a dry ice delivery pipeline and a monitoring device for obtaining the corrosion damage rate of the cooling pipeline in real time. The monitoring device and the dry ice delivery pipeline are respectively connected to the cooling pipeline.
[0007] Based on the above scheme, the monitoring device includes a corrosion damage sensor for real-time monitoring of corrosion damage of the cooling pipeline and a processor for obtaining the corrosion damage rate according to the monitoring results of the corrosion damage sensor, and the corrosion damage sensor is connected to the cooling pipeline.
[0008] Based on the above solution, an electric valve is provided on the dry ice delivery pipeline.
[0009] Based on the above solution, the corrosion damage control device also includes a controller, and the controller is connected to the processor and the electric valve respectively.
[0010] On the basis of the above solution, the corrosion damage control device is arranged at the elbow part and / or the multi-way part of the cooling pipeline.
[0011] On the basis of the above scheme, it also includes a cooler and a delivery pump, wherein the cooler and the delivery pump are respectively arranged in the cooling pipeline, and the cooling pipeline is also used to flow through supercritical carbon dioxide users.
[0012] An embodiment of the present invention also provides a method for controlling corrosion damage of a supercritical carbon dioxide cooling system pipeline, wherein the cooling system includes a cooling pipeline, and the control method includes: real-time monitoring of the corrosion damage rate of the cooling pipeline; when the corrosion damage rate of the cooling pipeline is greater than a first preset value, injecting dry ice into the cooling pipeline.
[0013] Based on the above scheme, the control method also includes: when the corrosion damage rate of the cooling pipeline is less than a second preset value, stopping the injection of dry ice into the cooling pipeline; wherein the second preset value is less than the first preset value.
[0014] Based on the above scheme, real-time monitoring of the corrosion damage rate of the cooling pipeline specifically includes: real-time monitoring of the size of the corrosion damage of the cooling pipeline; and obtaining the corrosion damage rate according to the size of the corrosion damage.
[0015] On the basis of the above scheme, real-time monitoring of the corrosion damage rate of the cooling pipeline specifically includes: real-time monitoring of the corrosion damage rate of the elbow parts and / or multi-pass parts in the cooling pipeline.
[0016] A supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof provided in an embodiment of the present invention can obtain the corrosion damage status of the cooling pipeline in real time by setting a monitoring device. When the corrosion damage rate of the dry ice delivery pipeline exceeds an allowable range, the corrosion damage rate of the cooling pipeline can be reduced by injecting dry ice into the cooling pipeline, thereby effectively controlling the development of corrosion damage of the supercritical carbon dioxide cooling pipeline and extending the service life of the pipeline, which is of great significance to improving the reliability of the supercritical carbon dioxide cooling pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 A schematic diagram of a supercritical carbon dioxide cooling system according to an embodiment of the present invention;
[0019] Figure 2 Schematic diagram of the relationship between the dry ice concentration injected into the cooling pipeline and the corrosion damage rate in an embodiment of the present invention.
[0020] Description of reference numerals:
[0021] Among them, 1. Cooling pipeline; 2. Corrosion damage sensor; 3. Processor; 4. Cable; 5. Controller; 6. Dry ice delivery pipeline; 7. Electric valve; 8. Cooler; 9. Delivery pump; 10. Supercritical carbon dioxide user. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0023] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0024] refer to Figure 1The embodiment of the present invention provides a supercritical carbon dioxide cooling system, which includes a cooling pipeline 1 and a corrosion damage control device for controlling the corrosion damage of the cooling pipeline 1. The corrosion damage control device includes a dry ice delivery pipeline 6 and a monitoring device for obtaining the corrosion damage rate of the cooling pipeline 1 in real time, and the monitoring device and the dry ice delivery pipeline 6 are respectively connected to the cooling pipeline 1. The dry ice delivery pipeline is used to inject dry ice into the cooling pipeline when the corrosion damage rate of the cooling pipeline exceeds a preset range.
[0025] A supercritical carbon dioxide cooling system is a cooling system that uses supercritical carbon dioxide as a cooling medium. The cooling system includes a cooling pipeline 1, in which supercritical carbon dioxide flows. Supercritical carbon dioxide is transported to a location that requires cooling through the cooling pipeline 1. When in use, the cooling pipeline 1 will be corroded and damaged by the supercritical carbon dioxide. This embodiment proposes to set up a corrosion damage control device to control the corrosion damage of the cooling pipeline 1. Different from the existing treatment technology for preventing corrosion damage and replacing pipelines after damage, the corrosion damage control device in this embodiment is used to control the corrosion damage process of the cooling pipeline 1.
[0026] Specifically, the corrosion damage control device monitors the corrosion damage rate of the cooling pipeline 1 in real time through the monitoring device, so as to judge the corrosion damage of the cooling pipeline 1 according to the corrosion damage rate. When the corrosion damage rate of the cooling pipeline 1 increases to exceed the allowable range, the corrosion damage control device inputs dry ice into the cooling pipeline 1 through the dry ice delivery pipeline 6. According to the test results, when a certain concentration of dry ice exists in the supercritical carbon dioxide pipeline, the corrosion rate of the pipeline will be significantly reduced. Therefore, by introducing dry ice into the cooling pipeline 1, the continued growth of the corrosion damage rate can be effectively controlled, and the control of pipeline corrosion damage can be achieved.
[0027] A supercritical carbon dioxide cooling system provided in this embodiment can obtain the corrosion damage status of the cooling pipeline 1 in real time by setting a monitoring device. When the corrosion damage rate of the dry ice delivery pipeline 6 exceeds the allowable range, the corrosion damage rate of the cooling pipeline 1 can be reduced by injecting dry ice into the cooling pipeline 1, thereby effectively controlling the development of corrosion damage of the supercritical carbon dioxide cooling pipeline 1 and extending the service life of the pipeline, which is of great significance to improving the reliability of the supercritical carbon dioxide cooling pipeline 1.
[0028] On the basis of the above embodiments, further, referring to Figure 1 The monitoring device includes a corrosion damage sensor 2 for real-time monitoring of corrosion damage of the cooling pipeline 1 and a processor 3 for obtaining a corrosion damage rate according to the monitoring result of the corrosion damage sensor 2. The corrosion damage sensor 2 is connected to the cooling pipeline 1.
[0029] On the basis of the above embodiment, further, an electric valve 7 is provided on the dry ice delivery pipeline 6. The electric valve 7 is used to control the on-off and opening degree of the dry ice delivery pipeline 6.
[0030] On the basis of the above embodiment, the corrosion damage control device further includes a controller 5, and the controller 5 is connected to the processor 3 and the electric valve 7 respectively.
[0031] The corrosion damage sensor 2 monitors the corrosion damage in real time at the corrosion damage part of the cooling pipeline 1. The corrosion damage sensor 2 is electrically connected to the processor 3 through the cable 4, that is, the signal connection. The corrosion damage sensor 2 is installed in the cooling pipeline 1, and the processor 3 is electrically connected to the corrosion damage sensor 2 through the cable 4. The processor 3 is electrically connected to the input end of the controller 5 through the cable 4, and the output end of the controller 5 is electrically connected to the electric valve 7 through the cable 4 to control the opening and closing and the opening degree of the electric valve 7.
[0032] A corrosion damage sensor 2 can be installed at the key structural part of the cooling pipeline 1 to monitor the corrosion damage in real time. The signal detected by the corrosion damage sensor 2 is transmitted to the processor 3 in real time for processing to obtain the corrosion damage size value of the corresponding part. The corrosion damage rate can be obtained by taking the first-order derivative of the corrosion damage size value with respect to time, and the corrosion damage rate is sent to the controller in real time. The corrosion damage size value usually starts from a depth of 0.5mm and gradually increases. The diameter of the corrosion part is between 3mm and 5mm.
[0033] When the controller 5 detects that the corrosion damage rate exceeds a certain value, it determines that the corrosion damage expansion of the corresponding key structural parts of the cooling pipeline 1 is aggravated, and the controller 5 sends an opening command to the electric valve 7 to inject dry ice into the cooling pipeline 1 by opening the electric valve 7 to reduce the corrosion damage rate of the cooling pipeline 1.
[0034] Furthermore, in this embodiment, the corrosion damage sensor 2 is a waveguide sensor, and the processor 3 is a waveguide detector. The waveguide detector is used to send an excitation signal and excite ultrasonic guided waves on the cooling pipeline 1 through the waveguide sensor. The waveguide sensor is used to collect echo signals generated by the ultrasonic guided waves reflected at the corrosion damage, and send the echo signals to the waveguide detector. The waveguide detector obtains the corrosion damage size value on the cooling pipeline 1 based on the echo signal, and obtains the corrosion damage rate according to the corrosion damage size value.
[0035] Specifically, the principle of guided wave corrosion damage detection is to generate elastic guided waves by exciting mechanical vibration in the cooling pipeline 1. When the guided waves propagate in the cooling pipeline 1, they encounter corrosion damage on the cooling pipeline 1, and part of the waves will be reflected back. When the reflected guided waves pass through the guided wave sensor, a magnetostrictive inverse effect occurs, which generates an electrical signal in the guided wave sensor. The guided wave detector collects, processes and analyzes the signals generated in the guided wave sensor, and can detect pipeline corrosion damage. By comparing and analyzing the characteristics of the transmitted pulse and the characteristics of the echo signal, the size value of the corrosion damage on the cooling pipeline 1 is obtained, and then the corrosion damage rate is obtained.
[0036] Furthermore, the corrosion damage sensor 2 may also be a fiber grating sensor, and the processor 3 may correspond to an optical signal modulator. The optical signal modulator is used to send out an optical signal, which is reflected by the fiber grating sensor and transmitted back to the optical signal modulator. The optical signal modulator obtains the corrosion damage size value on the cooling pipeline 1 based on the reflected optical signal, and then obtains the corrosion damage rate.
[0037] The monitoring device may be any structure capable of monitoring and obtaining the corrosion damage rate of the corrosion site, and is not specifically limited.
[0038] Figure 2 A graph showing the relationship between the dry ice concentration injected into the cooling pipeline 1 and the corrosion damage rate under a specific working condition is shown. According to the test results, it can be seen that by injecting dry ice into the cooling pipeline 1, the corrosion damage rate of the cooling pipeline 1 can be significantly reduced, and after increasing to a certain concentration, the corrosion damage rate no longer increases, thereby achieving effective suppression of the corrosion damage to the cooling pipeline 1.
[0039] On the basis of the above embodiment, further, a corrosion damage control device is provided at the elbow and / or multi-pass portion of the cooling pipeline 1. The multi-pass portion is a multi-pass connection interface portion. The elbow and multi-pass portion of the pipeline are portions that are prone to corrosion damage. A corrosion damage control device may be provided at the elbow and / or multi-pass portion of the pipeline to focus on monitoring the key portions of the cooling pipeline 1 and improve the control efficiency and effect.
[0040] Further, refer to Figure 1 In this embodiment, the supercritical carbon dioxide cooling system also includes a cooler 8 and a delivery pump 9. The delivery pump 9 is used to deliver supercritical carbon dioxide. The cooling pipeline 1 forms a circulation loop, and the cooler 8 and the delivery pump 9 are arranged on the loop. And the loop flows through the supercritical carbon dioxide user 10. The supercritical carbon dioxide user 10 can be the equipment structure to be cooled and other locations that need to exchange heat with supercritical carbon dioxide. The supercritical carbon dioxide user 10 can be arranged between the delivery pump 9 and the inlet of the cooler 8. The corrosion damage control device can be arranged on the cooling pipeline 1 before the inlet of the cooler 8.
[0041] On the basis of the above embodiments, further, this embodiment provides a supercritical carbon dioxide cooling system pipeline corrosion damage control method, wherein the cooling system includes a cooling pipeline 1, and the control method includes: real-time monitoring of the corrosion damage rate of the cooling pipeline 1; when the corrosion damage rate of the cooling pipeline 1 is greater than a first preset value, injecting dry ice into the cooling pipeline 1.
[0042] On the basis of the above embodiment, the control method further includes: when the corrosion damage rate of the cooling pipeline 1 is less than the second preset value, stop injecting dry ice into the cooling pipeline 1. That is, after the corrosion damage rate of the cooling pipeline 1 is greater than the first preset value and dry ice is injected into the cooling pipeline 1, the corrosion damage rate of the cooling pipeline 1 is continuously monitored, and when the corrosion damage rate decreases below the second preset value, the injection of dry ice into the cooling pipeline 1 may be stopped. The second preset value is less than the first preset value.
[0043] According to the test, when a certain concentration of dry ice exists in the supercritical carbon dioxide pipeline, the corrosion rate of the key parts of the pipeline will be significantly reduced. The supercritical carbon dioxide cooling pipeline 1 corrosion damage rate monitoring device monitors the damage rate of the key structural parts and transmits the damage rate value to the controller 5. When the damage rate value suddenly increases to exceed the first preset value, it indicates that the corrosion damage of the supercritical carbon dioxide cooling pipeline 1 is aggravated. The controller 5 sends a dry ice filling instruction to the dry ice delivery pipeline 6, and a certain amount of dry ice is injected into the supercritical carbon dioxide cooling pipeline 1. When the damage rate of the key structural parts of the supercritical carbon dioxide cooling pipeline 1 is reduced to a permitted stable value, the dry ice filling is stopped.
[0044] On the basis of the above embodiment, further, real-time monitoring of the corrosion damage rate of the cooling pipeline 1 specifically includes: real-time monitoring of the size of the corrosion damage of the cooling pipeline 1; and obtaining the corrosion damage rate according to the size of the corrosion damage.
[0045] On the basis of the above embodiment, further, real-time monitoring of the corrosion damage rate of the cooling pipeline 1 specifically includes: real-time monitoring of the corrosion damage rate of the elbow part and / or the multi-pass part in the cooling pipeline 1.
[0046] On the basis of the above embodiment, the control method further includes: obtaining in advance through experiments the optimal dry ice concentration value that can make the corrosion damage rate of the cooling pipeline 1 reach the lowest range; and controlling the flow rate of dry ice injected into the cooling pipeline 1 according to the optimal dry ice concentration value. The dry ice concentration is the concentration of the injected dry ice in the supercritical carbon dioxide fluid in the cooling pipeline 1.
[0047] Because the optimal dry ice concentration value that can reduce the corrosion damage rate of the cooling pipeline 1 to the lowest range is different with the different specific operating conditions of the cooling pipeline 1, that is, the same concentration of dry ice has different effects on reducing the corrosion damage rate of the cooling pipeline 1 under different operating conditions. In order to reduce the corrosion damage rate of the cooling pipeline 1 under different operating conditions to the lowest range, the required dry ice concentration is different.
[0048] This embodiment proposes that the influence of dry ice concentration on the corrosion damage rate of the cooling pipeline 1 under different working conditions can be studied in advance through experiments, and the optimal dry ice concentration values corresponding to the corrosion damage rate of the cooling pipeline 1 reaching the lowest range under different working conditions can be obtained. The optimal dry ice concentration value can also be a range. Then, when the cooling pipeline 1 is actually operating, the flow rate of dry ice injected into the cooling pipeline 1 is controlled according to the optimal dry ice concentration value corresponding to the actual operating conditions when the corrosion damage rate of the cooling pipeline 1 is greater than the first preset value.
[0049] When the optimal dry ice concentration value corresponding to the actual operating condition is large, the injection flow rate of dry ice can be increased; when the optimal dry ice concentration value corresponding to the actual operating condition is small, the injection flow rate of dry ice can be reduced.
[0050] On the basis of the above embodiments, this embodiment further proposes a supercritical carbon dioxide cooling system pipeline corrosion safety control device and method to address the deficiencies of the existing supercritical carbon dioxide cooling pipeline 1 corrosion damage development control technology and means. The supercritical carbon dioxide cooling system pipeline corrosion safety control device mainly includes a supercritical carbon dioxide cooling pipeline 1 corrosion damage rate monitoring device, a controller 5 and a dry ice filling mechanism; the monitoring device includes a corrosion damage sensor 2 and a processor 3, and the dry ice filling mechanism includes a dry ice delivery pipeline 6 and an electric valve 7 provided on the dry ice delivery pipeline 6.
[0051] This embodiment provides a supercritical carbon dioxide cooling system, including a supercritical carbon dioxide delivery pump 9, a supercritical carbon dioxide user 10 and a supercritical carbon dioxide cooling pipeline 1, wherein the supercritical carbon dioxide cooling pipeline 1 is provided with a corrosion safety control device.
[0052] The pipeline corrosion damage rate monitoring device is connected to the corrosion damage sensor 2 through the cable 4, and the corrosion damage size of the key structural part of the supercritical carbon dioxide cooling pipeline 1 is obtained. The corrosion damage rate of the key structural part of the supercritical carbon dioxide cooling pipeline 1 can be obtained by taking the first-order derivative of the corrosion damage size of the key structural part of the supercritical carbon dioxide cooling pipeline 1 with respect to time. When the corrosion damage rate of the key structural part of the supercritical carbon dioxide cooling pipeline 1 suddenly increases, it is determined that the corrosion damage of the key structural part of the supercritical carbon dioxide cooling pipeline 1 is aggravated, and a signal for adding dry ice is transmitted to the controller 5, and the controller 5 sends an opening instruction to the electric valve 7, and the electric valve 7 is opened, and dry ice is injected into the supercritical carbon dioxide cooling pipeline 1. When the corrosion damage rate of the key structural part of the supercritical carbon dioxide cooling pipeline 1 is reduced to a permitted stable value, the corrosion damage rate monitoring device transmits a signal to stop adding dry ice to the controller 5, and the controller 5 sends a closing instruction to the electric valve 7, and the electric valve 7 is closed.
[0053] Adding a certain concentration of dry ice into the system can significantly reduce the corrosion rate of the supercritical carbon dioxide cooling pipeline 1, thereby extending the service life of the supercritical carbon dioxide cooling pipeline 1 and improving the reliability of the supercritical carbon dioxide cooling pipeline 1.
[0054] The pipeline corrosion safety control device and method of the supercritical carbon dioxide cooling system are combined with pipeline damage monitoring technology. By adding dry ice into the pipeline, the corrosion rate of the supercritical carbon dioxide cooling pipeline 1 can be significantly reduced, the development of corrosion damage of the supercritical carbon dioxide cooling pipeline 1 can be effectively controlled, and the service life of the pipeline can be extended, which is of great significance to improving the reliability of the supercritical carbon dioxide cooling pipeline 1.
[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims
1. A supercritical carbon dioxide cooling system, comprising a cooling pipeline, characterized in that: Also included is a corrosion damage control device for controlling the corrosion damage of the cooling pipeline, the corrosion damage control device includes a dry ice delivery pipeline and a monitoring device for obtaining the corrosion damage rate of the cooling pipeline in real time, the monitoring device and the dry ice delivery pipeline are respectively connected to the cooling pipeline; The monitoring device includes a corrosion damage sensor for real-time monitoring of corrosion damage of the cooling pipeline and a processor for obtaining a corrosion damage rate according to a monitoring result of the corrosion damage sensor, wherein the corrosion damage sensor is connected to the cooling pipeline; The corrosion damage control device is arranged at the elbow part and / or the multi-way part of the cooling pipeline.
2. The supercritical carbon dioxide cooling system according to claim 1, characterized in that: An electric valve is arranged on the dry ice delivery pipeline.
3. The supercritical carbon dioxide cooling system according to claim 2, characterized in that: The corrosion damage control device also includes a controller, and the controller is connected to the processor and the electric valve respectively.
4. The supercritical carbon dioxide cooling system according to claim 1, characterized in that: It also includes a cooler and a delivery pump, wherein the cooler and the delivery pump are respectively arranged on the cooling pipeline, and the cooling pipeline is also used to flow through a supercritical carbon dioxide user.
5. A method for controlling corrosion damage of pipelines in a supercritical carbon dioxide cooling system, wherein the cooling system includes cooling pipelines, characterized in that: The control method includes: Real-time monitoring of the corrosion damage rate of cooling pipes; When the corrosion damage rate of the cooling pipeline is greater than a first preset value, dry ice is injected into the cooling pipeline.
6. The method for controlling corrosion damage of pipelines in a supercritical carbon dioxide cooling system according to claim 5, characterized in that: The control method also includes: When the corrosion damage rate of the cooling pipeline is less than a second preset value, stopping injecting dry ice into the cooling pipeline; The second preset value is smaller than the first preset value.
7. The method for controlling corrosion damage of pipelines in a supercritical carbon dioxide cooling system according to claim 5, characterized in that: Real-time monitoring of the corrosion damage rate of cooling pipes specifically includes: Real-time monitoring of the size of corrosion damage in cooling pipes; The corrosion damage rate is obtained based on the size of the corrosion damage.
8. The method for controlling corrosion damage of pipelines in a supercritical carbon dioxide cooling system according to claim 5, characterized in that: Real-time monitoring of the corrosion damage rate of cooling pipes specifically includes: The corrosion damage rate of the elbows and / or multi-pass parts in the cooling pipeline is monitored in real time.