阅读说明：本技术 超临界二氧化碳冷却系统及其管路腐蚀损伤控制方法 (Supercritical carbon dioxide cooling system and pipeline corrosion damage control method thereof ) 是由 劳星胜 林原胜 赵振兴 柯汉兵 柯志武 戴春辉 张克龙 代路 柳勇 吴君 马灿 于 2020-05-28 设计创作，主要内容包括：本发明涉及超临界二氧化碳管路技术领域,公开了一种超临界二氧化碳冷却系统及其管路腐蚀损伤控制方法,其中冷却系统包括冷却管路,还包括用于对冷却管路的腐蚀损伤进行控制的腐蚀损伤控制装置,腐蚀损伤控制装置包括干冰输送管路以及用于实时获取冷却管路腐蚀损伤速率的监测装置,监测装置和干冰输送管路分别连接于冷却管路。本发明提供的一种超临界二氧化碳冷却系统及其管路腐蚀损伤控制方法,设置干冰输送管路在腐蚀损伤速率超过允许范围时,通过向冷却管路中注入干冰可降低冷却管路的腐蚀损伤速率,从而可有效控制超临界二氧化碳冷却管路腐蚀损伤发展、延长管路使用寿命,对提高超临界二氧化碳冷却管路可靠性具有重要意义。(The invention relates to the technical field of supercritical carbon dioxide pipelines, and discloses a supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof, wherein the cooling system comprises a cooling pipeline and a corrosion damage control device for controlling the corrosion damage of the cooling pipeline, the corrosion damage control device comprises a dry ice conveying pipeline and a monitoring device for acquiring the corrosion damage rate of the cooling pipeline in real time, and the monitoring device and the dry ice conveying pipeline are respectively connected with the cooling pipeline. According to the supercritical carbon dioxide cooling system and the pipeline corrosion damage control method thereof provided by the invention, when the corrosion damage rate of the dry ice conveying pipeline exceeds the allowable range, the corrosion damage rate of the cooling pipeline can be reduced by injecting dry ice into the cooling pipeline, so that the corrosion damage development of the supercritical carbon dioxide cooling pipeline can be effectively controlled, the service life of the pipeline is prolonged, and the method has important significance for improving the reliability of the supercritical carbon dioxide cooling pipeline.)

1. The utility model provides a supercritical carbon dioxide cooling system, includes the cooling tube way, its characterized in that still includes and is used for carrying out the corrosion damage controlling means who controls the corrosion damage of cooling tube way, corrosion damage controlling means includes dry ice conveying line and is used for acquireing the monitoring devices of cooling tube way corrosion damage speed in real time, monitoring devices with dry ice conveying line connects respectively in the cooling tube way.

2. The supercritical carbon dioxide cooling system according to claim 1, wherein the monitoring device comprises a corrosion damage sensor for monitoring corrosion damage of the cooling pipeline in real time and a processor for obtaining a corrosion damage rate according to a monitoring result of the corrosion damage sensor, and the corrosion damage sensor is connected to the cooling pipeline.

3. The supercritical carbon dioxide cooling system according to claim 2, wherein an electrically operated valve is provided on the dry ice delivery line.

4. The supercritical carbon dioxide cooling system of claim 3 wherein the corrosion damage control device further comprises a controller, the controller being connected to the processor and the electrically operated valve, respectively.

5. The supercritical carbon dioxide cooling system according to claim 1, wherein the corrosion damage control device is provided at an elbow portion and/or a multi-pass portion of the cooling line.

6. The supercritical carbon dioxide cooling system according to claim 1 further comprising a cooler and a transfer pump, wherein the cooler and the transfer pump are respectively disposed on the cooling pipeline, and the cooling pipeline is further configured to flow through the supercritical carbon dioxide user.

7. A method for controlling corrosion damage of a pipeline of a supercritical carbon dioxide cooling system, wherein the cooling system comprises a cooling pipeline, is characterized by comprising the following steps:

monitoring the corrosion damage rate of the cooling pipeline in real time;

and when the corrosion damage rate of the cooling pipeline is greater than a first preset value, injecting dry ice into the cooling pipeline.

8. The method for controlling corrosion damage to a supercritical carbon dioxide cooling system pipeline as recited in claim 7, further comprising:

when the corrosion damage rate of the cooling pipeline is smaller than a second preset value, stopping injecting dry ice into the cooling pipeline;

and the second preset value is smaller than the first preset value.

9. The method for controlling corrosion damage to a pipeline of a supercritical carbon dioxide cooling system according to claim 7, wherein the real-time monitoring of the corrosion damage rate of the cooling pipeline specifically comprises:

monitoring the size of corrosion damage of the cooling pipeline in real time;

the rate of corrosion damage is obtained according to the size of the corrosion damage.

10. The method for controlling corrosion damage to a pipeline of a supercritical carbon dioxide cooling system according to claim 7, wherein the real-time monitoring of the corrosion damage rate of the cooling pipeline specifically comprises:

and monitoring the corrosion damage rate of the elbow part and/or the multi-way part in the cooling pipeline in real time.

Technical Field

The invention relates to the technical field of supercritical carbon dioxide pipelines, in particular to a supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof.

Background

Supercritical fluids are fluids with temperatures and pressures above the critical point and have many unique properties. The carbon dioxide is non-toxic, has good physical and chemical properties, has a proportion of 0.3 percent in air, has a lower critical temperature of 31.2 ℃ and a moderate critical pressure of 72.9 atm. When the carbon dioxide is in a supercritical state, the carbon dioxide has the dual characteristics of gas and liquid, the density is approximate to that of liquid (about 200 times of air density and 800 times of air density), the viscosity and the diffusion coefficient are close to those of gas (about 100 times of liquid), and the carbon dioxide has better fluidity and transmission characteristics.

Cooling with supercritical carbon dioxide fluids has gained attention in recent years. The low-pressure carbon dioxide gas is pressurized to be above the critical pressure through a pressurization system and is heated to be above the critical temperature, and then the carbon dioxide can be in a supercritical state. Due to the rapid pressure drop of the supercritical carbon dioxide fluid, the supercritical carbon dioxide fluid instantaneously absorbs heat and expands, thereby achieving the effect of instantaneous low temperature.

The pipelines in the supercritical carbon dioxide cooling system can generate corrosion damage in the using process, most of the existing treatment means aiming at the corrosion damage of the supercritical carbon dioxide cooling pipeline are pre-corrosion prevention and corrosion damage post-treatment, and means for controlling the corrosion of the cooling pipeline is lacked.

Disclosure of Invention

The embodiment of the invention provides a supercritical carbon dioxide cooling system and a pipeline corrosion damage control method thereof, which are used for solving or partially solving the problem that the existing method for treating the corrosion damage of the supercritical carbon dioxide cooling pipeline lacks a corrosion control means for the cooling pipeline.

The embodiment of the invention provides a supercritical carbon dioxide cooling system, which comprises a cooling pipeline and a corrosion damage control device for controlling the corrosion damage of the cooling pipeline, wherein the corrosion damage control device comprises a dry ice conveying pipeline and a monitoring device for acquiring the corrosion damage rate of the cooling pipeline in real time, and the monitoring device and the dry ice conveying pipeline are respectively connected to the cooling pipeline.

On the basis of the scheme, the monitoring device comprises a corrosion damage sensor and a processor, wherein the corrosion damage sensor is used for monitoring the corrosion damage of the cooling pipeline in real time, the processor is used for obtaining the corrosion damage rate according to the monitoring result of the corrosion damage sensor, and the corrosion damage sensor is connected to the cooling pipeline.

On the basis of the scheme, an electric valve is arranged on the dry ice conveying pipeline.

On the basis of the scheme, the corrosion damage control device further comprises a controller, and the controller is connected with the processor and the electric valve respectively.

On the basis of the scheme, the corrosion damage control device is arranged at the elbow part and/or the multi-way part of the cooling pipeline.

On the basis of the scheme, the device further comprises 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 for flowing through a supercritical carbon dioxide user.

The embodiment of the invention also provides a method for controlling the corrosion damage of the pipeline of the supercritical carbon dioxide cooling system, wherein the cooling system comprises a cooling pipeline, and the control method comprises the following steps: monitoring the corrosion damage rate of the cooling pipeline in real time; and when the corrosion damage rate of the cooling pipeline is greater than a first preset value, injecting dry ice into the cooling pipeline.

On the basis of the above scheme, the control method further includes: when the corrosion damage rate of the cooling pipeline is smaller than a second preset value, stopping injecting dry ice into the cooling pipeline; and the second preset value is smaller than the first preset value.

On the basis of the scheme, the real-time monitoring of the corrosion damage rate of the cooling pipeline specifically comprises the following steps: monitoring the size of corrosion damage of the cooling pipeline in real time; the rate of corrosion damage is obtained according to the size of the corrosion damage.

On the basis of the scheme, the real-time monitoring of the corrosion damage rate of the cooling pipeline specifically comprises the following steps: and monitoring the corrosion damage rate of the elbow part and/or the multi-way part in the cooling pipeline in real time.

According to the supercritical carbon dioxide cooling system and the pipeline corrosion damage control method thereof provided by the embodiment of the invention, the corrosion damage condition of the cooling pipeline can be known in real time by arranging the monitoring device, and when the corrosion damage rate of the dry ice conveying pipeline exceeds the allowable range, the corrosion damage rate of the cooling pipeline can be reduced by injecting dry ice into the cooling pipeline, so that the corrosion damage development of the supercritical carbon dioxide cooling pipeline can be effectively controlled, the service life of the pipeline is prolonged, and the method has important significance for improving the reliability of the supercritical carbon dioxide cooling pipeline.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a supercritical carbon dioxide cooling system according to an embodiment of the present invention;

fig. 2 is a schematic diagram illustrating a relationship between a concentration of dry ice injected into a cooling pipeline and a corrosion damage rate according to an embodiment of the present invention.

Description of reference numerals:

wherein, 1, cooling pipeline; 2. a corrosion damage sensor; 3. a processor; 4. a cable; 5. a controller; 6. a dry ice conveying pipeline; 7. an electrically operated valve; 8. a cooler; 9. a delivery pump; 10. supercritical carbon dioxide user.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1, an embodiment of the present invention provides a supercritical carbon dioxide cooling system, which includes a cooling pipeline 1, and further includes a corrosion damage control device for controlling corrosion damage of the cooling pipeline 1. The corrosion damage control device comprises a dry ice conveying pipeline 6 and a monitoring device used for acquiring the corrosion damage rate of the cooling pipeline 1 in real time, and the monitoring device and the dry ice conveying pipeline 6 are respectively connected to the cooling pipeline 1. The dry ice conveying pipeline is used for injecting dry ice into the cooling pipeline when the corrosion damage rate of the cooling pipeline exceeds a preset range.

The supercritical carbon dioxide cooling system is a cooling system using supercritical carbon dioxide as a cooling medium. The cooling system comprises a cooling circuit 1, and supercritical carbon dioxide flows in the cooling circuit 1. The supercritical carbon dioxide is transported via cooling line 1 to the location where cooling is required. The cooling line 1 is corroded by the supercritical carbon dioxide and damaged when in use. The present embodiment proposes to provide a corrosion damage control device to control corrosion damage of the cooling pipeline 1. Unlike the existing processing technology for preventing corrosion damage and replacing the pipeline after damage, the corrosion damage control device in this embodiment is used to control the corrosion damage process of the cooling pipeline 1.

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 condition of the cooling pipeline 1 according to the corrosion damage rate. When the corrosion damage rate of the cooling line 1 increases beyond the allowable range, the corrosion damage control device inputs dry ice into the cooling line 1 through the dry ice conveying line 6. According to test results, when certain concentration of dry ice exists in the supercritical carbon dioxide pipeline, the corrosion rate of the pipeline is obviously reduced. Therefore, by introducing dry ice into the cooling pipeline 1, the corrosion damage rate can be effectively controlled to continue increasing, and the control on the corrosion damage of the pipeline is realized.

The supercritical carbon dioxide cooling system provided by the embodiment can know the corrosion damage condition of the cooling pipeline 1 in real time by arranging the monitoring device, and the dry ice conveying pipeline 6 is arranged to reduce the corrosion damage rate of the cooling pipeline 1 by injecting dry ice into the cooling pipeline 1 when the corrosion damage rate exceeds the allowable range, so that the corrosion damage development of the supercritical carbon dioxide cooling pipeline 1 can be effectively controlled, the service life of the pipeline is prolonged, and the system has important significance for improving the reliability of the supercritical carbon dioxide cooling pipeline 1.

On the basis of the above embodiment, further, referring to fig. 1, the monitoring device includes a corrosion damage sensor 2 for monitoring corrosion damage of the cooling pipeline 1 in real time and a processor 3 for obtaining a corrosion damage rate according to a monitoring result of the corrosion damage sensor 2, wherein the corrosion damage sensor 2 is connected to the cooling pipeline 1.

In addition to the above embodiment, an electric valve 7 is further provided on the dry ice conveying pipe 6. The electric valve 7 is used for controlling the on-off and the opening degree of the dry ice conveying pipeline 6.

On the basis of the above embodiment, further, 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.

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, i.e. signal-connected, to the processor 3 by means of a cable 4. The corrosion damage sensor 2 is installed on the cooling pipeline 1, and the processor 3 is electrically connected to the corrosion damage sensor 2 through a 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 of the electric valve 7 and the opening degree.

The corrosion damage sensor 2 can be installed at the key structure part of the cooling pipeline 1 to monitor the corrosion damage in real time, signals detected by the corrosion damage sensor 2 are transmitted to the processor 3 in real time to be processed, the corrosion damage size value of the corresponding part is obtained, the first-order derivative is obtained through the corrosion damage size value to time, the corrosion damage rate can be obtained, and the corrosion damage rate is sent to the controller in real time. The size value of the corrosion damage generally increases gradually from the depth of 0.5 mm. The diameter of the corrosion part is between 3mm and 5 mm.

After the controller 5 detects that the corrosion damage rate exceeds a certain numerical value, the corrosion damage expansion of the corresponding key structure part of the cooling pipeline 1 is determined to be intensified, the controller 5 sends an opening instruction to the electric valve 7, and dry ice is injected into the cooling pipeline 1 by opening the electric valve 7 so as to reduce and control the corrosion damage rate of the cooling pipeline 1.

Further, in this embodiment, the corrosion damage sensor 2 is a guided wave sensor, the processor 3 is a guided wave detector, and the guided wave detector is configured to send an excitation signal and excite an ultrasonic guided wave on the cooling pipeline 1 through the guided wave sensor. The guided wave sensor is used for collecting echo signals generated by the reflection of the ultrasonic guided waves at the corrosion damage part and sending the echo signals to the guided wave detector. The guided wave detector obtains a corrosion damage size value on the cooling pipeline 1 based on the echo signal, and obtains a corrosion damage rate according to the corrosion damage size value.

Specifically, the principle that guided wave corrosion damage detected is through the production elasticity guided wave of excitation mechanical vibration in cooling pipeline 1, and the guided wave meets the corrosion damage on cooling pipeline 1 at the in-process that the guided wave propagated in cooling pipeline 1, and partly ripples can reflect back, and the guided wave that reflects back takes place the inverse effect of magnetostriction when passing through guided wave sensor, produces the signal of telecommunication among the messenger guided wave sensor, and the guided wave detector carries out the acquisition and processing analysis to the signal that produces among the guided wave sensor, just can realize the detection to pipeline corrosion damage. By comparing and analyzing the characteristics of the transmitted pulses and the characteristics of the echo signals, the size value of the corrosion damage on the cooling pipeline 1 is obtained, and further the corrosion damage rate is obtained.

Further, the corrosion damage sensor 2 may also be a fiber grating sensor, and the processor 3 may correspond to an optical signal demodulator. The optical signal demodulator is used for sending an optical signal, the optical signal is reflected by the fiber bragg grating sensor and is transmitted back to the optical signal demodulator, and the optical signal demodulator obtains a corrosion damage size value on the cooling pipeline 1 based on the reflected optical signal, so that the corrosion damage rate is obtained.

The monitoring device may be any structure capable of monitoring and acquiring the corrosion damage rate of the corrosion site, and is not particularly limited.

Fig. 2 shows a relationship diagram between the concentration of the dry ice injected into the cooling pipeline 1 and the corrosion damage rate under a specific working condition, and it can be seen from the test results that the corrosion damage rate of the cooling pipeline 1 can be significantly reduced by injecting the dry ice into the cooling pipeline 1, and after the concentration is increased to a certain concentration, the corrosion damage rate is not increased any more, so that the effective inhibition of the corrosion damage of the cooling pipeline 1 is realized.

In addition to the above-described embodiments, a corrosion damage control device is further provided at the elbow portion and/or the multi-pass portion of the cooling line 1. The multi-way part is the multi-way connecting interface part. The elbow part and the multi-pass part of the pipeline are parts which are easy to be corroded and damaged. Can set up corrosion damage controlling means at the elbow position of pipeline and/or the position that leads to carry out key monitoring to the key position of cooling line 1, improve control efficiency and effect.

Further, referring to fig. 1, the supercritical carbon dioxide cooling system in the present embodiment further includes a cooler 8 and a transfer pump 9. The transfer pump 9 is used for transferring the supercritical carbon dioxide. The cooling circuit 1 forms a circulation circuit on which a cooler 8 and a transfer pump 9 are arranged. And the loop flows through the supercritical carbon dioxide customer 10. The supercritical carbon dioxide user 10 may be the equipment structure to be cooled and other locations where heat exchange with supercritical carbon dioxide is desired. A supercritical carbon dioxide user 10 may be provided between the transfer pump 9 and the inlet of the cooler 8. The corrosion damage control device may be provided on the cooling line 1 before the inlet of the cooler 8.

On the basis of the foregoing embodiments, further, the present embodiment provides a method for controlling corrosion damage of a pipeline of a supercritical carbon dioxide cooling system, where the cooling system includes a cooling pipeline 1, and the method includes: monitoring the corrosion damage rate of the cooling pipeline 1 in real time; and 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.

On the basis of the above embodiment, further, the control method further includes: and when the corrosion damage rate of the cooling pipeline 1 is smaller than a second preset value, stopping injecting dry ice into the cooling pipeline 1. Namely, 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 is reduced to be lower than the second preset value, the dry ice injection into the cooling pipeline 1 can be stopped. And the second preset value is smaller than the first preset value.

According to experiments, when certain concentration of dry ice exists in the supercritical carbon dioxide pipeline, the corrosion rate of key parts of the pipeline is obviously reduced. The monitoring device for the corrosion damage rate of the supercritical carbon dioxide cooling pipeline 1 monitors the damage rate of the key structure part and transmits a damage rate value to the controller 5, when the damage rate value is suddenly increased to exceed a first preset value, which 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 conveying pipeline 6, a certain amount of dry ice is filled into the supercritical carbon dioxide cooling pipeline 1, and when the damage rate of the key structure part of the supercritical carbon dioxide cooling pipeline 1 is reduced to an allowable stable value, the dry ice filling is stopped.

On the basis of the above embodiment, further, the real-time monitoring of the corrosion damage rate of the cooling pipeline 1 specifically includes: monitoring the size of corrosion damage of the cooling pipeline 1 in real time; the rate of corrosion damage is obtained according to the size of the corrosion damage.

On the basis of the above embodiment, further, the real-time monitoring of the corrosion damage rate of the cooling pipeline 1 specifically includes: and (3) monitoring the corrosion damage rate of the elbow part and/or the multi-way part in the cooling pipeline 1 in real time.

On the basis of the above embodiment, further, the control method further includes: the optimal dry ice concentration value which can enable the corrosion damage rate of the cooling pipeline 1 to reach the lowest range is obtained in advance through experiments; 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 line 1.

Because the optimal dry ice concentration value capable of reducing the corrosion damage rate of the cooling pipeline 1 to the lowest range is different along with different specific operation conditions of the cooling pipeline 1, that is, the effect of the dry ice with the same concentration on the reduction of the corrosion damage rate of the cooling pipeline 1 under different operation conditions is different, and the required dry ice concentration is different in order to reduce the corrosion damage rate of the cooling pipeline 1 under different operation conditions to the lowest range.

In this embodiment, the influence of the 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 respectively corresponding to the corrosion damage rate of the cooling pipeline 1 reaching the lowest range under different working conditions are obtained. The optimum dry ice concentration value may likewise be a range. And then controlling the flow rate of injecting dry ice into the cooling pipeline 1 when the corrosion damage rate of the cooling pipeline 1 is greater than a first preset value according to the optimal dry ice concentration value corresponding to the actual operation working condition when the cooling pipeline 1 actually operates.

When the optimal dry ice concentration value corresponding to the actual operation working condition is larger, the injection flow of the dry ice can be increased; when the optimal dry ice concentration value corresponding to the actual operation working condition is smaller, the injection flow of the dry ice can be reduced.

On the basis of the above embodiments, further, the present embodiment provides a device and a method for controlling the corrosion safety of a supercritical carbon dioxide cooling system pipeline, aiming at the defects of the existing technology and means for developing and controlling the corrosion damage of the supercritical carbon dioxide cooling pipeline 1. The pipeline corrosion safety control device of the supercritical carbon dioxide cooling system mainly comprises a supercritical carbon dioxide cooling pipeline 1 corrosion damage rate monitoring device, a controller 5 and a dry ice filling mechanism; the monitoring device comprises a corrosion damage sensor 2 and a processor 3, and the dry ice filling mechanism comprises a dry ice conveying pipeline 6 and an electric valve 7 arranged on the dry ice conveying pipeline 6.

The embodiment provides a supercritical carbon dioxide cooling system, which comprises a supercritical carbon dioxide delivery pump 9, a supercritical carbon dioxide user 10 and a supercritical carbon dioxide cooling pipeline 1, wherein a corrosion safety control device is arranged on the supercritical carbon dioxide cooling pipeline 1.

The pipeline corrosion damage rate monitoring device is connected with the corrosion damage sensor 2 through a cable 4, the size of corrosion damage of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 is obtained, and the first derivative of the size of the corrosion damage of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 to time is obtained, so that the corrosion damage rate of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 can be obtained. When the corrosion damage rate of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 is suddenly increased, the corrosion damage of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 is judged to be aggravated, a signal for filling dry ice is transmitted to the controller 5, the controller 5 sends an opening instruction to the electric valve 7, the electric valve 7 is opened, and the dry ice is filled into the supercritical carbon dioxide cooling pipeline 1. When the corrosion damage rate of the critical structure part of the supercritical carbon dioxide cooling pipeline 1 is reduced to an allowable stable value, the corrosion damage rate monitoring device transmits a signal for stopping filling dry ice to the controller 5, the controller 5 sends a closing instruction to the electric valve 7, and the electric valve 7 is closed.

The system is filled with dry ice with a certain concentration, so that the corrosion rate of the supercritical carbon dioxide cooling pipeline 1 is obviously reduced, the service life of the supercritical carbon dioxide cooling pipeline 1 is prolonged, and the reliability of the supercritical carbon dioxide cooling pipeline 1 is improved.

The device and the method for controlling the corrosion safety of the supercritical carbon dioxide cooling system pipeline are combined with a pipeline damage monitoring technology, and dry ice is filled into the pipeline, so that the corrosion rate of the supercritical carbon dioxide cooling pipeline 1 can be obviously reduced, the corrosion damage development of the supercritical carbon dioxide cooling pipeline 1 is effectively controlled, the service life of the pipeline is prolonged, and the device and the method have important significance for improving the reliability of the supercritical carbon dioxide cooling pipeline 1.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.