A method and system for controlling the release of supercritical carbon dioxide through pipelines

Abstract

This invention relates to a method and system for controlling the release of supercritical carbon dioxide through a pipeline, which can obtain a first temperature corresponding to the pipeline. The pipeline includes a horizontal main pipe and a vent riser, with the vent hole located in the vent riser. The first temperature is the temperature inside the horizontal main pipe when the orifice diameter of the vent hole is a first value. Since the first temperature is less than a first preset temperature, the orifice diameter of the vent hole can be adjusted to a second value, which is less than the first value. Based on the orifice diameter of the vent hole being a standard value, the pipeline is controlled to release carbon dioxide; the standard value is determined based on the second value. This invention can adjust the orifice diameter of the pipeline during the release process, thereby avoiding blockage of the vent port caused by dry ice and improving the safety of the pipeline during the release process.

Description

Technical Field

[0001] This invention relates to the field of pipeline depressurization and venting technology, and in particular to a method and system for controlling the release of supercritical carbon dioxide from pipelines. Background Technology

[0002] Using pipelines to transport carbon dioxide is currently an important method of carbon dioxide delivery. However, due to factors such as pipeline installation and environmental corrosion, when a carbon dioxide pipeline malfunctions, it is necessary to release the carbon dioxide from the pipeline in order to carry out repairs.

[0003] During the release of carbon dioxide, the Joule-Thomson effect may occur, causing a phase change in the carbon dioxide and converting it into dry ice. Since dry ice is a solid, it may cause blockage of the release port, and may even damage the pipeline if the minimum temperature capacity is exceeded, posing a safety hazard. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a method and system for controlling the release of supercritical carbon dioxide through pipelines, which can adjust the diameter of the release orifice of the pipeline during the release process, thereby avoiding blockage of the release port caused by dry ice and improving the safety of the pipeline during the release process.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] In a first aspect, the present invention provides a method for controlling the release of supercritical carbon dioxide through a pipeline, which can obtain a first temperature corresponding to the pipeline. The pipeline includes a horizontal main pipe and a vent riser, with a vent hole located in the vent riser. The first temperature is the temperature inside the horizontal main pipe when the diameter of the vent hole is a first value. Based on the fact that the first temperature is less than a first preset temperature, the diameter of the vent hole is adjusted to a second value, which is less than the first value. Based on the fact that the diameter of the vent hole is a standard value, the pipeline is controlled to release carbon dioxide, the standard value being determined based on the second value.

[0007] The beneficial effects of this invention are: by adjusting the diameter of the discharge hole in the pipeline during the discharge process, blockage of the discharge port caused by dry ice can be avoided, thereby improving the safety of the pipeline during the discharge process.

[0008] Based on the above technical solution, the present invention can be further improved as follows.

[0009] Further, a second temperature corresponding to the pipeline is obtained, which is the internal temperature of the vent riser when the orifice diameter of the vent hole is a first value. Based on the fact that the second temperature is less than a second preset temperature, a first pressure corresponding to the pipeline is obtained, which is the internal pressure of the vent riser. Based on the fact that the first pressure is greater than the preset pressure, the temperature of the vent riser is heated from the second temperature to a third temperature, which is greater than the second temperature. Based on the fact that the temperature of the vent riser is a standard temperature, the pipeline is controlled to vent, and the standard temperature is determined based on the third temperature.

[0010] The beneficial effect of adopting the above-mentioned further solution is that by adjusting the temperature inside the pipe during the pipeline venting process, the blockage of the venting port caused by dry ice can be avoided, thereby improving the safety of the pipeline during the venting process.

[0011] Furthermore, before obtaining the first temperature corresponding to the pipeline, the initial temperature and initial pressure corresponding to the pipeline can also be obtained. The initial temperature is the temperature inside the pipeline before venting, and the initial pressure is the pressure inside the pipeline before venting. Based on the initial temperature and initial pressure, the orifice diameter of the vent is adjusted to the first value. Based on the orifice diameter of the vent being the first value, the pipeline is controlled to vent.

[0012] The beneficial effect of adopting the above-mentioned further solution is that, based on the initial temperature and initial pressure of the pipeline, the initial orifice diameter of the vent can be set so that the pipeline can vent based on the initial orifice diameter of the vent.

[0013] Furthermore, before obtaining the first temperature corresponding to the pipeline, the throttling stage of the pipeline during venting can be adjusted to the first stage based on the initial temperature and initial pressure. Based on the first stage of throttling of the pipeline, the pipeline is controlled to vent.

[0014] The beneficial effect of adopting the above-mentioned further solution is that, based on the initial temperature and initial pressure of the pipeline, the throttling stage of the pipeline can be set so that the pipeline can release water based on the throttling stage.

[0015] Furthermore, a fourth temperature can be obtained corresponding to the pipe, which is the temperature inside the horizontal main pipe when the orifice diameter of the vent is a second value. Based on the fourth temperature being greater than or equal to a first preset temperature, the second value is determined as a standard value. Alternatively, based on the fourth temperature being less than the first preset temperature, the orifice diameter of the vent is adjusted to a third value. The third value is less than the second value.

[0016] The beneficial effect of adopting the above-mentioned further solution is that, after adjusting the orifice diameter of the vent to the second value, it is possible to continue to detect whether there is a risk of blockage at the vent, that is, to detect whether the fourth temperature is greater than or equal to the first preset temperature. If the fourth temperature is greater than or equal to the first preset temperature, then there is no risk of blockage at the vent, and the pipeline can be controlled to vent based on the orifice diameter of the vent at the second value. If the fourth temperature is less than the first preset temperature, then there is a risk of blockage at the vent, and the orifice diameter of the vent can be adjusted until it is detected that there is no risk of blockage at the vent.

[0017] Furthermore, a second pressure corresponding to the pipeline can be obtained. This second pressure is the pressure inside the vent riser when its temperature is a third temperature. Based on the second pressure being less than or equal to a preset pressure, the third temperature is determined as a standard temperature. Alternatively, based on the second pressure being greater than the preset pressure, the temperature of the vent riser is heated from the third temperature to a fifth temperature. The fifth temperature is greater than the third temperature.

[0018] The beneficial effect of adopting the above-mentioned further solution is that after heating the temperature of the vent riser from the third temperature to the fifth temperature, it is still possible to continue to detect whether there is a risk of blockage at the vent outlet, that is, to detect whether the second pressure is less than or equal to the preset pressure. If the second pressure is detected to be less than or equal to the preset pressure, then there is no risk of blockage at the vent outlet, and the pipeline can be controlled to vent based on the temperature of the vent riser at the third temperature. If the second pressure is detected to be greater than the preset pressure, then there is a risk of blockage at the vent outlet, and the temperature of the vent riser can be continued to be heated until it is detected that there is no risk of blockage at the vent outlet.

[0019] In a second aspect, the present invention provides a supercritical carbon dioxide pipeline venting control system, comprising:

[0020] A temperature acquisition module is used to acquire a first temperature corresponding to the pipeline. The pipeline includes a horizontal main pipe and a vent riser, with a vent hole located in the vent riser. The first temperature is the temperature inside the horizontal main pipe when the orifice diameter of the vent hole is a first value. A vent hole adjustment module is used to adjust the orifice diameter of the vent hole to a second value based on the first temperature being less than a first preset temperature. The second value is less than the first value. A vent control module is used to control the pipeline to vent based on the orifice diameter of the vent hole being a standard value. The standard value is determined based on the second value.

[0021] The beneficial effects of this invention are: by adjusting the diameter of the discharge hole in the pipeline during the discharge process, blockage of the discharge port caused by dry ice can be avoided, thereby improving the safety of the pipeline during the discharge process.

[0022] Based on the above technical solution, the present invention can be further improved as follows.

[0023] Furthermore, the temperature acquisition module is also used to acquire a second temperature corresponding to the pipeline, which is the internal temperature of the vent riser when the orifice diameter of the vent hole is a first value. The system also includes a pressure acquisition module and a pipeline temperature regulation module. The pressure acquisition module is used to acquire a first pressure corresponding to the pipeline based on the second temperature being less than a second preset temperature. The first pressure is the internal pressure of the vent riser. The pipeline temperature regulation module is used to heat the temperature of the vent riser from the second temperature to a third temperature, where the third temperature is greater than the second temperature, based on the first pressure being greater than the preset pressure. The venting control module is also used to control the pipeline to vent based on the vent riser temperature being a standard temperature. The standard temperature is determined based on the third temperature.

[0024] The beneficial effect of adopting the above-mentioned further solution is that by adjusting the temperature inside the pipe during the pipeline venting process, the blockage of the venting port caused by dry ice can be avoided, thereby improving the safety of the pipeline during the venting process.

[0025] Furthermore, the temperature acquisition module is also used to acquire the initial temperature corresponding to the pipeline before acquiring the first temperature, the initial temperature being the pipe temperature before venting. The pressure acquisition module is also used to acquire the initial pressure corresponding to the pipeline before acquiring the first temperature, the initial pressure being the pipe pressure before venting. The vent adjustment module is also used to adjust the orifice diameter of the vent to the first value based on the initial temperature and initial pressure. The vent control module is also used to control the pipeline to vent based on the orifice diameter of the vent being the first value.

[0026] The beneficial effect of adopting the above-mentioned further solution is that, based on the initial temperature and initial pressure of the pipeline, the initial orifice diameter of the vent can be set so that the pipeline can vent based on the initial orifice diameter of the vent.

[0027] Furthermore, the system also includes a throttling stage adjustment module, which adjusts the throttling stage of the pipeline to the first stage during venting based on the initial temperature and initial pressure. The venting control module is also used to control the pipeline to vent based on the first stage throttling stage.

[0028] The beneficial effect of adopting the above-mentioned further solution is that, based on the initial temperature and initial pressure of the pipeline, the throttling stage of the pipeline can be set so that the pipeline can release water based on the throttling stage. Attached Figure Description

[0029] Figure 1A flowchart of a supercritical carbon dioxide pipeline venting control method provided by the present invention;

[0030] Figure 2 This is a schematic diagram of the pipe structure provided by the present invention;

[0031] Figure 3 A schematic diagram of the process for adjusting the discharge orifice diameter of a pipeline provided by the present invention;

[0032] Figure 4 A schematic diagram of the process for adjusting the temperature inside the tube provided by the present invention;

[0033] Figure 5 This is a schematic diagram of another process for adjusting the temperature inside the tube provided by the present invention.

[0034] Figure 6 A flowchart illustrating the process of determining the first value provided by the present invention;

[0035] Figure 7 A flowchart illustrating the process of determining the number of throttling stages provided by the present invention;

[0036] Figure 8 This is a schematic diagram of a supercritical carbon dioxide pipeline venting control system provided by the present invention.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. Horizontal main pipe, 2. Vent riser, 3. T-pipe, 4. First flange, 5. Solenoid valve, 6. Second flange, 7. First orifice plate, 8. Third flange, 9. First riser, 10. Second riser, 11. Second orifice plate, 12. Fourth flange, 13. Third orifice plate, 14. Fifth flange. Detailed Implementation

[0039] The principles and features of the present invention are described below. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0040] This invention provides a method and system for controlling the release of supercritical carbon dioxide through a pipeline. It can adjust the diameter of the release hole and / or the temperature inside the pipeline during the release process, thereby avoiding blockage of the release port caused by dry ice and improving the safety of the pipeline during the release process.

[0041] See Figure 1 The present invention provides a method for controlling the release of supercritical carbon dioxide through a pipeline, which may include steps S101-S103.

[0042] S101: Obtain the first temperature corresponding to the pipeline.

[0043] Among them, see Figure 2The pipeline includes a horizontal main pipe 1 and a vent riser 2. The horizontal main pipe 1 and the vent riser are arranged in an intersecting manner. At least one vent hole 3 is located on the vent riser. The first temperature is the temperature inside the horizontal main pipe 1 when the diameter of the vent hole 3 is a first value.

[0044] S102: Based on the fact that the first temperature is less than the first preset temperature, adjust the diameter of the vent hole to the second value.

[0045] The second value is less than the first value.

[0046] Because a larger vent diameter facilitates the vaporization of carbon dioxide in the pipe, and this vaporization causes a decrease in pipe temperature, the pipe temperature can be regulated by adjusting the vent diameter. Generally, excluding other factors affecting pipe temperature, a smaller vent diameter results in a higher pipe temperature. Therefore, if the pipe temperature is detected to be lower than a preset temperature, the vent diameter can be reduced to increase the pipe temperature and prevent dry ice formed from carbon dioxide vaporization from clogging the vent.

[0047] It should be noted that those skilled in the art can set the first preset temperature based on the actual application scenario; for example, the first preset temperature can be set to -30℃. This application does not limit the specific value of the first preset temperature.

[0048] S103: Based on the standard value of the vent hole diameter, control the pipeline to release water.

[0049] The standard value is determined based on the second value.

[0050] In some embodiments, see Figure 3 After adjusting the orifice diameter of the vent to the second value, a fourth temperature corresponding to the pipeline can also be obtained. This fourth temperature is the temperature inside the horizontal main pipe when the orifice diameter is set to the second value.

[0051] If the fourth temperature is greater than or equal to the first preset temperature, the second value can be determined as the standard value, and the pipeline can be controlled to release based on the diameter of the vent hole.

[0052] If the fourth temperature is lower than the first preset temperature, the diameter of the vent hole can be adjusted to the third value, and the temperature inside the horizontal main pipe can be rechecked to see if it is greater than or equal to the first preset temperature. The third value is less than the second value.

[0053] In other words, after adjusting the orifice diameter of the vent to the second value, this embodiment of the application can continue to detect whether there is a risk of blockage at the vent, that is, detect whether the fourth temperature is greater than or equal to the first preset temperature. If the fourth temperature is greater than or equal to the first preset temperature, there is no risk of blockage at the vent, and the pipeline can be controlled to vent based on the orifice diameter of the vent to the second value. If the fourth temperature is less than the first preset temperature, there is a risk of blockage at the vent, and the orifice diameter of the vent can be adjusted until it is detected that there is no risk of blockage at the vent.

[0054] In some embodiments, see Figure 4 The present invention may also include steps S401-S404.

[0055] S401: Obtain the second temperature corresponding to the pipeline.

[0056] The second temperature is the temperature inside the vented riser when the orifice diameter of the vent hole is the first value.

[0057] S402: Based on the fact that the second temperature is less than the second preset temperature, obtain the first pressure corresponding to the pipeline.

[0058] The first pressure is the pressure inside the vent riser.

[0059] It should be noted that those skilled in the art can set the second preset temperature based on the actual application scenario. The second preset temperature can be the same as or different from the first preset temperature. For example, the second preset temperature can be set to -30℃ or -56℃. The embodiments of this application do not limit the specific value of the first preset temperature.

[0060] S403: Based on the first pressure being greater than the preset pressure, the temperature of the vent riser is heated from the second temperature to the third temperature.

[0061] The third temperature is greater than the second temperature.

[0062] In some embodiments, the preset pressure can be determined based on the external pressure. For example, the preset pressure can be set to the external pressure. If the first pressure is greater than the external pressure, it indicates that the pipeline is still venting. Therefore, the pipeline can be heated so that the internal temperature is not lower than a second preset temperature. By directly adjusting the internal temperature, the blockage of the vent by dry ice formed from carbon dioxide vaporization can be avoided.

[0063] S404: Based on the temperature of the vent riser as the standard temperature, control the pipeline to release water.

[0064] The standard temperature is determined based on a third temperature.

[0065] In some embodiments, see Figure 5 After heating the vent riser from the second temperature to the third temperature, the corresponding second pressure of the pipe can also be obtained. This second pressure is the pressure inside the vent riser when its temperature is the third temperature.

[0066] If the second pressure is less than or equal to the preset pressure, the third temperature can be set as the standard temperature, and the pipeline can be controlled to release pressure based on the temperature of the vent riser.

[0067] If the second pressure is greater than the preset pressure, the temperature of the vent riser can be raised from the third temperature to the fifth temperature. Then, the pressure inside the vent riser at the fifth temperature is rechecked to ensure it is less than or equal to the preset pressure. The fifth temperature is greater than the third temperature.

[0068] In other words, after heating the vent riser from the third temperature to the fifth temperature, it is still possible to continue detecting whether there is a risk of blockage at the vent outlet, specifically, detecting whether the second pressure is less than or equal to the preset pressure. If the second pressure is detected to be less than or equal to the preset pressure, there is no risk of blockage at the vent outlet, and the pipeline can be controlled to release water based on the temperature of the vent riser at the third temperature. If the second pressure is detected to be greater than the preset pressure, there is a risk of blockage at the vent outlet, and the temperature of the vent riser can be continued to be heated until it is detected that there is no risk of blockage at the vent outlet.

[0069] In some embodiments, before performing S101, see [link to S101]. Figure 6 Alternatively, steps S601-S603 can be executed to control the release of the pipeline.

[0070] S601: Obtain the initial temperature and initial pressure of the pipeline.

[0071] The initial temperature is the temperature inside the pipe before venting, and the initial pressure is the pressure inside the pipe before venting.

[0072] S602: Based on the initial temperature and initial pressure, adjust the orifice diameter of the vent to the first value.

[0073] Specifically, the initial orifice diameter of the vent can be set based on the initial temperature and initial pressure; that is, the orifice diameter is set to a first value. The first value is the orifice diameter of the vent, predicted based on the initial temperature and initial pressure, that is, the orifice diameter that is unlikely to be blocked by the formation of dry ice from carbon dioxide vaporization.

[0074] S603: Based on the orifice diameter of the vent hole as the first value, control the pipeline to vent.

[0075] In some embodiments, before performing S401, see [link to S401]. Figure 7Steps S701-S703 can also be executed to control the release of the pipeline.

[0076] S701: Obtain the initial temperature and initial pressure of the pipeline.

[0077] The initial temperature is the temperature inside the pipe before venting, and the initial pressure is the pressure inside the pipe before venting.

[0078] S702: Based on the initial temperature and initial pressure, adjust the throttling stage of the pipeline during venting to the first stage.

[0079] In some embodiments, the throttling stage of the vent can be set based on the initial temperature and initial pressure; that is, the throttling stage of the vent can be set to the first stage. The first stage is the value of the throttling stage of the vent, which is predicted based on the initial temperature and initial pressure, such that the orifice diameter is not easily blocked by the formation of dry ice from carbon dioxide vaporization.

[0080] S703: Based on the first-level throttling stage of the pipeline, control the pipeline to release water.

[0081] In other words, this invention provides a multi-stage throttling venting pressure relief test method, which can investigate the impact of multi-stage throttling on the temperature drop inside the pipe during venting. Because the low-temperature CO2 with heavy gas characteristics released during leakage easily forms a high-concentration zone in low-lying areas, it can cause asphyxiation, coma, or even death to humans. Therefore, this invention can test the effects of venting from different directions on the formation of low-temperature zones inside the pipe and the formation of high-concentration zones outside the pipe.

[0082] See Figure 8 The present invention provides a supercritical carbon dioxide pipeline venting control system, which may include a temperature acquisition module, a venting hole adjustment module, and a venting control module.

[0083] The temperature acquisition module is used to acquire the first temperature corresponding to the pipeline. The first temperature is the temperature inside the horizontal main pipe when the diameter of the vent hole is a first value.

[0084] In some embodiments, see continue to see Figure 2The pipeline in this invention includes a horizontal main pipe 1, a vent riser 2, and a tee pipe 3. The horizontal main pipe 1 and the vent riser 2 are connected by the tee pipe 3. The horizontal main pipe 1 and the tee pipe 3 are connected by a first flange 4. A solenoid valve 5 is installed on the tee pipe. The tee pipe 3 and the vent riser 2 are connected by a second flange 6. A detachable first orifice plate 7 may be installed on the vent riser 2, and the second flange 6 can be used to support the first orifice plate 7. The first orifice plate 7 has at least one vent hole. The vent riser 2 may also include a first riser 9 and a second riser 10 connected by a third flange 8. The first riser 9 is located close to the tee pipe 3, and the second riser 10 is located away from the tee pipe 3. A second orifice plate 11 may be installed between the first riser 9 and the second riser 10, and the second orifice plate 11 has at least one vent hole. A fourth flange 12 may be installed at the end of the second riser 10 away from the tee pipe 3, and a third orifice plate 13 may be installed on the fourth flange 12.

[0085] When the system provided by this invention controls the pipeline to vent, the fourth flange 12 is used to close one outlet of the pipeline. When the pipeline needs to vent horizontally, the tee pipe 3 and the vent riser 2 can be disconnected from the second flange 6, and the vent riser 2 can be connected to the tee pipe 3 through the fifth flange 14.

[0086] During operation, the system allows setting the internal pressure and temperature of horizontal pipe 1 to meet operational requirements. Then, solenoid valve 5 can be opened to allow carbon dioxide to flow from horizontal pipe 1 into tee pipe 3, and also to flow from the first orifice plate 7 into the first riser 9. Carbon dioxide can also flow from the second orifice plate 11 into the second riser 10, and then out through the third orifice plate 13.

[0087] The vent adjustment module is used to adjust the vent diameter to a second value based on a first temperature being lower than a first preset temperature. The second value is lower than the first value.

[0088] The venting control module is used to control the pipeline to vent based on the standard value of the vent orifice diameter. The standard value is determined based on the second value.

[0089] In some embodiments, the temperature acquisition module is further configured to acquire a second temperature corresponding to the pipe. The second temperature is the temperature inside the vented riser when the orifice diameter of the vent hole is a first value.

[0090] In some embodiments, the system provided by the present invention further includes a pressure acquisition module and a pipeline temperature regulation module. The pressure acquisition module is used to acquire a first pressure corresponding to the pipeline based on a second temperature being lower than a second preset temperature. The first pressure is the pressure inside the vent riser. The pipeline temperature regulation module is used to heat the temperature of the vent riser from the second temperature to a third temperature based on a first pressure being higher than a preset pressure. The third temperature is higher than the second temperature. The venting control module is also used to control the pipeline to vent based on the temperature of the vent riser being a standard temperature. The standard temperature is determined based on the third temperature.

[0091] In some embodiments, the temperature acquisition module is further configured to acquire an initial temperature corresponding to the pipeline before acquiring the first temperature, wherein the initial temperature is the pipe temperature before venting. The pressure acquisition module is further configured to acquire an initial pressure corresponding to the pipeline before acquiring the first temperature, wherein the initial pressure is the pipe pressure before venting. The vent adjustment module is further configured to adjust the orifice diameter of the vent to a first value based on the initial temperature and initial pressure. The vent control module is further configured to control the pipeline to vent based on the orifice diameter of the vent being the first value.

[0092] In some embodiments, the system provided by the present invention further includes a throttling stage adjustment module. This module is used to adjust the throttling stage of the pipeline to a first stage based on the initial temperature and initial pressure. The discharge control module is also used to control the pipeline to discharge based on the first stage throttling stage.

[0093] The system provided by this invention uses orifice plates instead of valves at the pipe connections, which allows for accurate control of the venting opening and ensures the pipe maintains a constant opening during the venting process, thus enhancing safety. This invention achieves multi-stage throttling by installing orifice plates at the vent riser connections and vent outlets. The system provided by this invention allows for the selection of different throttling stages and the replacement of orifice plates with different diameters to achieve carbon dioxide venting at different openings, depending on experimental requirements. The pipes in the system provided by this invention can be replaced with vent risers of different diameters and lengths. The pipes in the system provided by this invention can vent gas (carbon dioxide) vertically or horizontally.

[0094] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0095] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0096] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0097] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0098] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0099] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for controlling the release of supercritical carbon dioxide through a pipeline, characterized in that, include: Obtain the first temperature corresponding to the pipeline; the pipeline includes a horizontal main pipe and a vent riser; the vent hole is located in the vent riser; The first temperature is the temperature inside the horizontal main pipe when the diameter of the vent hole is a first value; Based on the fact that the first temperature is lower than the first preset temperature, the diameter of the vent hole is adjusted to a second value; the second value is lower than the first value. Based on the standard value of the orifice diameter, the pipeline is controlled to release water. The standard value is determined based on the second value; The method further includes: Obtain the second temperature corresponding to the pipe; the second temperature is the temperature inside the vent riser when the diameter of the vent hole is a first value; Based on the fact that the second temperature is less than the second preset temperature, the first pressure corresponding to the pipeline is obtained; the first pressure is the pressure inside the vent riser. Based on the fact that the first pressure is greater than the preset pressure, the temperature of the venting riser is heated from the second temperature to the third temperature; the third temperature is greater than the second temperature; Based on the temperature of the vent riser as the standard temperature, the pipeline is controlled to release water; the standard temperature is determined based on the third temperature.

2. The method according to claim 1, characterized in that, Before obtaining the first temperature corresponding to the pipeline, the method further includes: Obtain the initial temperature and initial pressure corresponding to the pipeline; the initial temperature is the temperature inside the pipeline before venting; the initial pressure is the pressure inside the pipeline before venting. Based on the initial temperature and initial pressure, the diameter of the vent hole is adjusted to the first value; The pipe is controlled to release water based on the diameter of the vent hole being a first value.

3. The method according to claim 2, characterized in that, Before obtaining the first temperature corresponding to the pipeline, the method further includes: Based on the initial temperature and initial pressure, the throttling stage of the pipeline during venting is adjusted to the first stage; The throttling stage of the pipeline is set to the first stage, and the pipeline is controlled to release water.

4. The method according to claim 3, characterized in that, The method of controlling the pipeline to release water based on the standard value of the orifice diameter of the vent further includes: Obtain the fourth temperature corresponding to the pipeline; the fourth temperature is the temperature inside the horizontal main pipe when the diameter of the vent hole is the second value. Based on the fact that the fourth temperature is greater than or equal to the first preset temperature, the second value is determined as the standard value; or, Based on the fact that the fourth temperature is less than the first preset temperature, the diameter of the vent hole is adjusted to a third value; the third value is less than the second value.

5. The method according to claim 4, characterized in that, The method of controlling the venting pipeline to release water based on the standard temperature of the venting riser also includes: Obtain the second pressure corresponding to the pipeline; the second pressure is the pressure inside the vent riser when the temperature of the vent riser is the third temperature; Based on the premise that the second pressure is less than or equal to the preset pressure, the third temperature is determined as the standard temperature; or, Based on the fact that the second pressure is greater than the preset pressure, the temperature of the venting riser is heated from the third temperature to the fifth temperature; the fifth temperature is greater than the third temperature.

6. A supercritical carbon dioxide pipeline venting control system, characterized in that, include: A temperature acquisition module is used to acquire the first temperature corresponding to the pipeline; the pipeline includes a horizontal main pipe and a vent riser; the vent hole is located in the vent riser; The first temperature is the temperature inside the horizontal main pipe when the diameter of the vent hole is a first value; The vent adjustment module is used to adjust the vent diameter to a second value based on the first temperature being lower than a first preset temperature; the second value is lower than the first value. The discharge control module is used to control the pipeline to discharge based on a standard value for the diameter of the discharge orifice; the standard value is determined based on the second value. The temperature acquisition module is also used to acquire a second temperature corresponding to the pipe; the second temperature is the temperature inside the venting riser when the diameter of the vent hole is a first value. The system also includes a pressure acquisition module and a pipeline temperature regulation module; The pressure acquisition module is used to acquire a first pressure corresponding to the pipeline based on the second temperature being less than a second preset temperature; the first pressure is the pressure inside the vent riser. The pipeline temperature regulation module is used to heat the temperature of the vent riser from a second temperature to a third temperature based on the first pressure being greater than a preset pressure; the third temperature is greater than the second temperature. The venting control module is also used to control the pipeline to vent based on the temperature of the venting riser as a standard temperature; the standard temperature is determined based on the third temperature.

7. The system according to claim 6, characterized in that, The temperature acquisition module is also used to acquire the initial temperature of the pipe before acquiring the first temperature, the initial temperature being the pipe temperature before the discharge. The pressure acquisition module is also used to acquire the initial pressure corresponding to the pipeline before acquiring the first temperature, and the initial pressure is the pressure inside the pipeline before venting. The vent adjustment module is also used to adjust the vent diameter to the first value based on the initial temperature and initial pressure; The discharge control module is also used to control the pipeline to discharge based on the diameter of the discharge hole being a first value.

8. The system according to claim 7, characterized in that, Also includes: The throttling stage adjustment module is used to adjust the throttling stage of the pipeline to the first stage during venting based on the initial temperature and initial pressure. The discharge control module is also used to control the pipeline to discharge based on the throttling level of the pipeline being the first level.

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