Device and method for regulating and controlling boosting path in production process of supercritical CO2 conveying pipeline

Abstract

The invention discloses a device and method for regulating and controlling a boosting path in the production process of a supercritical CO2 conveying pipeline. The device comprises a gaseous CO2 supply part, a compressor and a heat exchanger which are in fluid communication in sequence. A throttle valve provided on the flow path between the supply unit and the heat exchanger; the downstream pipeline assembly is arranged at the downstream of the heat exchanger and is provided with a visual window; a pipe heating part configured to heat the downstream pipe assembly; a temperature sensor configured to detect a temperature within the downstream conduit assembly; a pressure sensor configured to detect a pressure within the downstream conduit assembly; and the processor is configured to obtain and record real-time detection values of the temperature sensor and the pressure sensor. According to the invention, the boost path can be regulated and controlled by regulating and controlling the set values of the plurality of key parameters, so that the preferable boost path which does not cross the gas-liquid equilibrium line and directly enters the supercritical zone and the preferable set values of the key parameters corresponding to the preferable boost path are determined to be used for guiding actual production.

Description

Technical Field

[0001] The present invention relates to the technical field of supercritical CO2 transportation, and in particular to a device and method for regulating a pressure boosting path during the commissioning process of a supercritical CO2 transportation pipeline. Background Art

[0002] CO2 pipeline transportation plays an important role as a link in the carbon capture, utilization and storage technology (CCUS) industry chain. The critical point of pure CO2 is 30.95℃ and 7.37MPa. From an economic and technical point of view, supercritical CO2 has excellent fluidity, extremely low surface tension, and strong solubility, which can minimize the pressure drop. It has better fluidity and transmission than other phases. Transmitting CO2 in a supercritical state is currently the mainstream method in the world. The commissioning of CO2 pipelines involves a large pressure change process. If the pressure difference is too large during the pressure increase, pipeline vibration, gas plugs, and additional pipe damage may occur. How to achieve the pressure increase path of the low-pressure gaseous CO2 in the pipe without phase change and crossing the gas-liquid phase equilibrium line during the commissioning of the CO2 pipeline is crucial for the safe commissioning of the supercritical CO2 transmission pipeline. Therefore, it is necessary to provide a pressure increase path control scheme for the commissioning process of the supercritical CO2 transmission pipeline, and determine the preferred pressure increase path and the preferred set values ​​of related parameters through control to guide actual production. Summary of the invention

[0003] The main purpose of the present invention is to provide a device and method for regulating the pressure boost path during the commissioning process of a supercritical CO2 transmission pipeline, so as to solve the problem of lack of phase control technology during the commissioning and pressure boosting process in supercritical CO2 transmission.

[0004] According to one aspect of the present invention, a device for regulating the pressure boost path during the commissioning of a supercritical CO2 transmission pipeline is provided, comprising:

[0005] A gaseous CO2 supply, a compressor and a heat exchanger in sequential fluid communication;

[0006] a throttle valve disposed on a flow path between the supply portion and the heat exchanger;

[0007] A downstream pipeline assembly, disposed downstream of the heat exchanger and provided with a viewing window;

[0008] a pipeline heating unit configured to heat the downstream pipeline component;

[0009] a temperature sensor configured to detect a temperature within the downstream pipe assembly;

[0010] a pressure sensor configured to detect pressure within the downstream pipe assembly;

[0011] The processor is configured to obtain and record real-time detection values ​​of the temperature sensor and the pressure sensor.

[0012] According to one embodiment of the present invention, the downstream pipe assembly includes a plurality of first pipes connected in sequence and a second pipe connected between two of the first pipes, the first pipes are heated by the pipe heating portion, the second pipe is not heated by the pipe heating portion and the second pipe is provided with the visual window.

[0013] According to one embodiment of the present invention, the pipeline heating unit includes: a jacket pipe sleeved outside the first pipeline; and a heat exchange medium supply device configured to supply heat exchange medium into the jacket pipe.

[0014] According to one embodiment of the present invention, the first pipe and / or the second pipe is detachable.

[0015] According to an embodiment of the present invention, the processor is configured to draw a boost path based on real-time detection values ​​of the temperature sensor and the pressure sensor.

[0016] According to one embodiment of the present invention, it also includes: a volume flow meter arranged between the supply part and the compressor, and a mass flow meter arranged between the heat exchanger and the downstream pipeline component; the processor is configured to obtain and record real-time detection values ​​of the volume flow meter and the mass flow meter.

[0017] According to one embodiment of the present invention, the processor is configured to adjust the set values ​​of the following parameters based on user input: the heating temperature of the pipeline heating unit, the pressure head increase value of the compressor, the opening of the throttle valve, and the outlet temperature of the heat exchanger.

[0018] According to one embodiment of the present invention, the processor is configured to obtain and record information indicating whether a CO2 gas-liquid phase change occurs during each regulation process based on user input.

[0019] According to another aspect of the present invention, a method for regulating the pressure boost path during the commissioning of a supercritical CO2 transmission pipeline is proposed. The method is based on the above-mentioned device and comprises:

[0020] The pressure-boosting path is regulated multiple times by regulating the set values ​​of multiple parameters, wherein the multiple parameters include: the heating temperature of the pipeline heating unit, the pressure head increase value of the compressor, the opening of the throttle valve, and the outlet temperature of the heat exchanger;

[0021] Based on the real-time detection values ​​of the temperature sensor and the pressure sensor, a pressure boost path of each regulation process is drawn, and whether a CO2 gas-liquid phase change occurs during each regulation process is observed through the visual window;

[0022] A preferred boosting path is determined based on a boosting path of a control process in which no gas-liquid phase change of CO2 occurs, and a preferred set value is determined based on the set values ​​of the multiple parameters corresponding to the preferred boosting path.

[0023] According to one embodiment of the present invention, the preferred pressure boosting path is determined based on a pressure boosting path where no CO2 gas-liquid phase change occurs and the temperature is lower than a predetermined value.

[0024] Through the technical solution of the present invention, multiple boosting path controls can be performed by adjusting the set values ​​of multiple key parameters, so as to determine the preferred boosting path that does not cross the gas-liquid equilibrium line and directly enters the supercritical zone, and the corresponding preferred set values ​​of these key parameters are used to guide actual production and ensure the safe commissioning of the supercritical CO2 transmission pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0026] Figure 1 A schematic diagram showing a device for regulating a pressure boost path during commissioning of a supercritical CO2 transmission pipeline according to an embodiment of the present invention;

[0027] Figure 2 Schematic diagram showing different pressure-raising paths in the CO2 phase diagram.

[0028] Description of reference numerals:

[0029] 10. Gaseous CO2 supply unit; 20. Compressor; 30. Heat exchanger; 40. Throttle valve; 42. Pressure reducing valve; 44. Stop valve; 50. Downstream pipeline assembly; 52. First pipeline; 54. Second pipeline; 60. Pipeline heating unit; 62. Jacketed pipe; 64. Heat exchange medium providing equipment; 70. Temperature sensor; 72. Pressure sensor; 74. Differential pressure sensor; 80. Volume flow meter; 82. Mass flow meter; 90. Waste gas tank; 100. Boost path control device. DETAILED DESCRIPTION

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the embodiments of the present invention are further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0031] It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are for distinguishing two non-identical entities with the same name or non-identical parameters. It can be seen that "first" and "second" are only for the convenience of expression and should not be understood as limitations on the embodiments of the present invention. The subsequent embodiments will not explain this one by one.

[0032] refer to Figure 1 The present invention proposes a device 100 for regulating the pressure boost path during the commissioning process of a supercritical CO2 transmission pipeline, comprising: a gaseous CO2 supply unit (e.g., a high-pressure CO2 cylinder) 10, a compressor (e.g., a variable speed compressor) 20, and a heat exchanger 30 that are fluidly connected in sequence; a throttle valve 40, arranged on the flow path between the supply unit 10 and the heat exchanger 30; a downstream pipeline assembly 50, arranged downstream of the heat exchanger 30 and having a visual window; a pipeline heating unit 60, configured to heat the downstream pipeline assembly 50; a temperature sensor 70, configured to detect the temperature in the downstream pipeline assembly 50; a pressure sensor 72, configured to detect the pressure in the downstream pipeline assembly 50; and a processor, configured to obtain and record real-time detection values ​​of the temperature sensor 70 and the pressure sensor 72.

[0033] Based on the above-mentioned device 100 provided by the present invention, multiple boost path controls can be performed by adjusting the set values ​​of multiple key parameters (the heating temperature of the pipeline heating part 60, the pressure head increase value of the compressor 20, the opening of the throttle valve 40, and the outlet temperature of the heat exchanger 30), determining the boost path of each control process and observing through the visual window whether a gas-liquid phase change occurs during each control process. On this basis, analysis is performed to ultimately determine the preferred boost path that does not cross the gas-liquid equilibrium line but directly enters the supercritical zone (further, the preferred boost path can be a boost path that is as close to the gas-liquid equilibrium line as possible but does not enter the liquid phase zone) and the corresponding preferred set values ​​of these key parameters to guide actual production and ensure the safe commissioning of the supercritical CO2 transmission pipeline.

[0034] If real-time control is performed on the commissioning process of the supercritical CO2 pipeline, the pressure boost path will enter the liquid phase under some operating conditions, such as Figure 2 As shown in path 1. Figure 2 Path 1 is the pressure-boosting path at different positions in the supercritical CO2 pipeline during the commissioning process. Obviously, during the pressure-boosting process, the liquid phase is entered, which will bring many safety problems and should be avoided. However, under different pipeline ambient temperatures, by controlling the compressor pressure head, throttle valve opening, heat exchanger outlet temperature, and pipeline heating temperature in real time during the pressure-boosting process, the pressure-boosting path of the supercritical CO2 pipeline during the commissioning process can be controlled so that the pressure-boosting path does not pass through the liquid phase. Figure 2 As shown in Path 3. Observe Figure 2It can be found from path 3 that this path is far away from the gas-liquid equilibrium line. If it is due to the use of a high-power compressor or the existence of a large pressure difference in the pipeline, it is uneconomical or unsafe. A practical control method is needed to control the boost path as close to the gas-liquid equilibrium line as possible without entering the liquid phase, such as Figure 2 As shown in path 2. In order to optimize the pressure increase path of the designed supercritical CO2 pipeline during the commissioning process, to find out how to achieve Figure 2 The present invention provides a method for dynamically adjusting the optimal path shown in path 2. The present invention provides a device for regulating the pressure-boosting path during the commissioning of a supercritical CO2 transmission pipeline as described above, as well as many details and control methods of the device to be described below.

[0035] It can be known that in the actual production process, as the impurity content of CO2 varies, it will show a gas-liquid equilibrium line, equilibrium point, phase boundary, etc. that are different from pure CO2. Therefore, it is necessary to adjust and determine the preferred boost path that is suitable for the actual situation. The inventors of the present application recognize that the determination of the actual boost path will be affected by key parameters such as the heating temperature of the pipe heating unit 60, the pressure head increase of the compressor 20, the opening of the throttle valve 40, and the outlet temperature of the heat exchanger 30. Therefore, the corresponding pipe heating unit 60, compressor 20, throttle valve 40 and heat exchanger 30 are provided in the device 100 of the present invention. The boost path is regulated by adjusting the set values ​​of the relevant parameters of these components. In each regulation process, the pressure head of the compressor 20 gradually increases, thereby gradually increasing the pressure of CO2 until it is transformed into a supercritical state. As Figure 2 As shown, the boost path is determined by a series of temperature values ​​and pressure values ​​corresponding to each other in a time series (the boost path can be drawn in a coordinate system with temperature as the horizontal axis and pressure as the vertical axis), so that a temperature sensor 70 and a pressure sensor 72 for detecting the temperature and pressure in the downstream pipeline component 50 are set in the device 100 of the present invention, so that the boost path of the regulation process can be drawn based on the real-time detection values ​​of the temperature sensor 70 and the pressure sensor 72 during each regulation process. In addition, in the device 100 of the present invention, a visual window is set on the downstream pipeline component 50, so that it can be observed through the visual window to determine whether a gas-liquid phase change occurs during each regulation process, which serves as an important reference for selecting a preferred boost path. Therefore, based on the device 100 of the present invention, boost path regulation can be carried out to determine the preferred boost path and the preferred set values ​​of the corresponding related parameters.

[0036] In some embodiments, the downstream pipe assembly 50 includes a plurality of first pipes 52 connected in sequence and a second pipe 54 connected between two first pipes 52, the first pipe 52 is heated by the pipe heating unit 60, the second pipe 54 is not heated by the pipe heating unit 60 and the second pipe 54 is provided with a visual window. Since the first pipe 52 needs to be heated by the pipe heating unit 60, the arrangement of the relevant heating components outside the pipe wall may make it inconvenient to arrange a visual window on the pipe wall, so the present invention provides the second pipe 54 as a visual pipe section, on which a visual window is arranged and not heated, and at the same time, the second pipe 54 is arranged between the two first pipes 52 to ensure that the temperature of the second pipe 54 will not deviate too much. The length of the second pipe 54 can be shorter than the length of the first pipe 52. The second pipe 54 can be provided with a rectangular visual window and a circular visual window.

[0037] In some embodiments, the pipeline heating unit 60 includes: a jacketed pipe 62 sleeved outside the first pipeline 52; and a heat exchange medium supply device 64 configured to supply heat exchange medium into the jacketed pipe 62. A circulation interface is provided on the jacketed pipe 62 for connecting with the pipeline of the heat exchange medium supply device 64, and the heat exchange medium can circulate in the jacketed pipe 62 for heat exchange. The heat exchange medium supply device 64 can be, for example, a temperature-controlled water circulation machine.

[0038] In some embodiments, the first pipeline 52 and / or the second pipeline 54 are detachable (can be detachably connected via flanges), which facilitates adjusting the length of the pipeline according to actual conditions. The first pipeline 52 can be a high temperature resistant hose.

[0039] In some embodiments, the processor is configured to draw a boost path based on the real-time detection values ​​of the temperature sensor 70 and the pressure sensor 72 .

[0040] In some embodiments, the device 100 further includes: a volume flow meter 80 disposed between the supply unit 10 and the compressor 20, and a mass flow meter 82 disposed between the heat exchanger 30 and the downstream pipeline assembly 50; the processor is configured to obtain and record real-time detection values ​​of the volume flow meter 80 and the mass flow meter 82. By setting the volume flow meter 80 and the mass flow meter 82, the flow rate and density of CO2 during the regulation process can be further measured. Based on the flow rate, temperature, pressure, density changes of CO2 over time, etc., the flow characteristics of CO2 in the pipeline when it is in different phases can be studied.

[0041] In some embodiments, the processor is configured to adjust the set values ​​of the following parameters based on user input: the heating temperature of the pipeline heating unit 60, the head increase value of the compressor 20, the opening of the throttle valve 40, and the outlet temperature of the heat exchanger 30. In this way, the parameter set values ​​can be automatically and remotely adjusted.

[0042] In some embodiments, the processor is configured to obtain and record information indicating whether a CO2 gas-liquid phase change occurs during each control process based on user input. The information of each control process is recorded in correspondence with pressure, temperature, parameter setting values, etc., for subsequent analysis.

[0043] In some embodiments, the device 100 also includes: a pressure reducing valve 42 arranged outside the outlet of the supply part 10, a stop valve 44 arranged between the heat exchanger 30 and the downstream pipeline assembly 50, a differential pressure sensor 74 connected to the downstream pipeline assembly 50, and an exhaust gas tank 90 arranged at the tail end of the device 100.

[0044] In some embodiments, the device 100 includes six parts: a gas supply system, a fluid temperature flow control system, a circulation system, a pipeline temperature control system, a measurement system, and a data acquisition and processing system. Among them, the gas supply system includes: a gaseous CO2 supply unit (such as a high-pressure CO2 cylinder) 10, a pressure reducing valve 42, and a compressor 20 connected in sequence into a closed system through a stainless steel gas pipeline. The fluid temperature flow control system includes: a throttle valve 40, a heat exchanger 30, and a stop valve 44. The circulation system includes: a plurality of first pipelines 52 and a second pipeline 54. The pipeline temperature control system includes: a heat exchange medium providing device (such as a temperature-controlled water circulation machine) 64, and a water circulation pipeline. The measurement system includes: a temperature sensor 70, a pressure sensor 72, a differential pressure sensor 74, a volume flow meter 80, and a mass flow meter 82. The data acquisition and processing system is a computer system.

[0045] During operation, the gas supply system provides a gas source through a gaseous CO2 supply unit (e.g., a high-pressure CO2 cylinder) 10 and then reaches the compressor 20 after being reduced in pressure by a pressure reducing valve 42. Thereafter, the gas passes through a throttle valve 40 in a fluid temperature flow control system for flow control, and then passes through a heat exchanger 30 for temperature control, and then enters the circulation system through a stop valve 44. The circulation system is composed of different pipe sections, which can be disassembled and repositioned. The temperature control device regulates the temperature of multiple first pipes 52. The second pipe 54 is equipped with a rectangular visual window and a circular visual window.

[0046] The present invention also provides a method for regulating the pressure boost path during the commissioning of a supercritical CO2 transmission pipeline. The method is based on the device 100 as described above and comprises:

[0047] The pressure-boosting path is regulated multiple times by regulating the set values ​​of multiple parameters, wherein the multiple parameters include: the heating temperature of the pipeline heating unit 60, the pressure head increase value of the compressor 20, the opening of the throttle valve 40, and the outlet temperature of the heat exchanger 30;

[0048] Based on the real-time detection values ​​of the temperature sensor 70 and the pressure sensor 72, the pressure boost path of each regulation process is drawn, and whether the CO2 gas-liquid phase change occurs during each regulation process is observed through the visual window;

[0049] A preferred boosting path is determined based on a boosting path of a control process in which no gas-liquid phase change of CO2 occurs, and a preferred set value is determined based on set values ​​of multiple parameters corresponding to the preferred boosting path.

[0050] In some embodiments, a preferred boost path is determined based on a boost path where no CO2 gas-liquid phase change occurs and where the temperature is lower than a predetermined value. The predetermined value can be determined based on actual conditions. For example, multiple boost paths where no gas-liquid phase change occurs can be first selected from multiple boost paths obtained by multiple controls, and the one with the lowest temperature or several with lower temperatures can be selected from multiple boost paths where no gas-liquid phase change occurs as the preferred boost path. Of course, in addition to this, the preferred boost path can also be determined based on other factors that may need to be considered.

[0051] In some embodiments, the control method may include the following steps:

[0052] Step 1: By monitoring the changes of pressure and temperature in the pipeline over time, the relationship between temperature and pressure over time is established, that is, a CO2 pressure increase path model in the pipeline is established.

[0053] Step 2, using the maximum value in the flow rate vs. time curve as a basis for judgment, and proposing the required compressor output requirement.

[0054] Step 3, first design different working conditions. Each working condition has different pipeline ambient temperature, compressor increased pressure head, throttle valve opening, and heat exchanger outlet temperature. Different working conditions have different boosting paths, and it is also necessary to continuously adjust the variables to achieve the ideal boosting path.

[0055] Step 4: At different phase transition moments, the temperature, pressure, and density curves over time will fluctuate to varying degrees, requiring data export and detailed analysis.

[0056] Step 5, by continuously and dynamically adjusting the four variables of pipeline ambient temperature, compressor added pressure head, throttle valve opening, and heat exchanger outlet temperature, phase control can be performed on the operating conditions where an undesirable boost path occurs.

[0057] Step 6, the complete boost path method requires that the pipeline ambient temperature is above 20°C, the compressor increases the pressure head by 2MPa each time, the throttle valve opening is 50%, and the heat exchanger outlet temperature is between 30-60°C.

[0058] In summary, the present invention provides a device and method for regulating the boost path during the commissioning of a supercritical CO2 pipeline, which solves the problem of lack of phase control technology in the commissioning boost process of supercritical CO2 transportation. The gaseous CO2 is introduced into the downstream pipeline assembly, and the boost path regulation technology during the commissioning of the supercritical CO2 transportation pipeline is studied through operations such as variable speed compressor boosting, heat exchanger temperature control, flow, valve closing and pressure stabilization.

[0059] The method provided by the present invention is a comprehensive method for obtaining a pressure-increasing path during the production process of a supercritical CO2 pipeline and for controlling the phase state of the supercritical CO2 pipeline. That is, based on the pipeline ambient temperature, the compressor pressure head, the throttle valve opening, and the dynamic adjustment setting of the heat exchanger outlet temperature, the flow, temperature, pressure, and density changes inside the pipeline at different times can be obtained, thereby determining the phase state of different pipe sections in the pipeline at a certain time, and according to the different phase states, studying the dynamic changes of each parameter, and determining whether each operation step is feasible. By setting different conditions, a reasonable pressure-increasing path starting from the gas state and avoiding the gas-liquid phase equilibrium line and critical point, critical pressure line, and finally reaching the supercritical state can be finally found.

[0060] The device of the present invention can be used to conduct the following studies:

[0061] (1) Tracking the entire process of CO2 pressure increase in the pipeline

[0062] Under different pipeline ambient temperatures, compressor added pressure heads, throttle valve openings, and heat exchanger outlet temperature settings, the entire process of the pressure boost path of each section of the CO2 pipeline changing over time can be tracked and recorded, and the pressure boost path image under different working conditions can be drawn using the output data processing system.

[0063] (2) Flow characteristics of CO2 in pipelines when it is in different phases

[0064] Since the CO2 that initially enters the pipeline is in a gaseous state, that is, the starting point CO2 is in a gaseous state, and the end point of the supercritical CO2 pipeline needs to be in a supercritical state, there are at least two phases in the pipeline before and after the dynamic change. Under different pipeline ambient temperatures, compressor pressure head, throttle valve opening, and heat exchanger outlet temperature settings, the CO2 in the pipeline will have different pressure increase paths and different phases. To study the flow characteristics, it is necessary to obtain the flow, temperature, pressure, and density changes over time under these different phases.

[0065] (3) Research on optimization of supercritical CO2 pipeline pressure boosting path control method

[0066] By adjusting the set values ​​of multiple key parameters, multiple boost path adjustments are performed to determine the optimal boost path that is as close to the gas-liquid equilibrium line as possible but does not enter the liquid phase region, and the corresponding optimal set values ​​of these key parameters are used to guide actual production.

[0067] The device of the present invention has the following effects:

[0068] (1) In the device, an air supply system is used to supply air to the booster pipeline, and the opening and closing of the control valve can also realize the pressure stabilization and leak detection of the entire pipeline and the segmented pipeline, saving research costs.

[0069] (2) In this device, by setting a visible segment, the different phases before and after the phase change can be observed, and the experimental data can be analyzed through the measurement system and the data acquisition and processing system.

[0070] (3) By changing the pipeline ambient temperature, compressor pressure head, throttle valve opening, and heat exchanger outlet temperature, the different pressure increase paths of CO2 in the pipeline can be studied.

[0071] A person skilled in the art should understand that the discussion of any of the above embodiments is only exemplary and is not intended to imply that the scope of the disclosure of the embodiments of the present invention (including the claims) is limited to these examples; under the concept of the embodiments of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the embodiments of the present invention as described above, which are not provided in detail for the sake of simplicity. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A device (100) for regulating the pressure boost path during the commissioning of a supercritical CO2 transmission pipeline, characterized in that: include: A gaseous CO2 supply unit (10), a compressor (20) and a heat exchanger (30) which are fluidly connected in sequence; a throttle valve (40) disposed on a flow path between the supply portion (10) and the heat exchanger (30); A downstream pipe assembly (50), arranged downstream of the heat exchanger (30) and provided with a viewing window; A pipeline heating unit (60) configured to heat the downstream pipeline component (50); a temperature sensor (70) configured to detect a temperature within the downstream pipe assembly (50); a pressure sensor (72) configured to detect pressure within the downstream pipe assembly (50); The processor is configured to obtain and record real-time detection values ​​of the temperature sensor (70) and the pressure sensor (72).

2. The device according to claim 1, characterized in that The downstream pipe assembly (50) comprises a plurality of first pipes (52) connected in sequence and a second pipe (54) connected between two of the first pipes (52), wherein the first pipes (52) are heated by the pipe heating portion (60), and the second pipe (54) is not heated by the pipe heating portion (60) and is provided with the viewing window.

3. The device according to claim 2, characterized in that The pipeline heating unit (60) It comprises: a jacket pipe (62) sleeved outside the first pipe (52); A heat exchange medium supply device (64) is configured to supply a heat exchange medium into the jacket tube (62).

4. The device according to claim 2, characterized in that The first pipe (52) and / or the second pipe (54) are detachable.

5. The device according to claim 1, characterized in that The processor is configured to draw a boost path based on real-time detection values ​​of the temperature sensor (70) and the pressure sensor (72).

6. The device according to claim 1, characterized in that Also includes: A volume flow meter (80) is arranged between the supply part (10) and the compressor (20), and a mass flow meter (82) is arranged between the heat exchanger (30) and the downstream pipeline component (50); the processor is configured to obtain and record real-time detection values ​​of the volume flow meter (80) and the mass flow meter (82).

7. The device according to claim 1, characterized in that The processor is configured to adjust the set values ​​of the following parameters based on user input: the heating temperature of the pipeline heating unit (60), the head pressure increase value of the compressor (20), the opening degree of the throttle valve (40), and the outlet temperature of the heat exchanger (30).

8. The device according to claim 1, characterized in that The processor is configured to obtain and record information indicating whether a CO2 gas-liquid phase change occurs during each regulation process based on user input.

9. A method for regulating the pressure boost path during the commissioning of a supercritical CO2 transmission pipeline, characterized in that: The method is performed based on the device (100) according to any one of claims 1 to 8, and the method comprises: The pressure-increasing path is regulated multiple times by regulating the set values ​​of multiple parameters, wherein the multiple parameters include: the heating temperature of the pipeline heating unit (60), the pressure head increase value of the compressor (20), the opening degree of the throttle valve (40), and the outlet temperature of the heat exchanger (30); Based on the real-time detection values ​​of the temperature sensor (70) and the pressure sensor (72), a pressure boost path of each regulation process is drawn, and whether a CO2 gas-liquid phase change occurs during each regulation process is observed through the visual window; A preferred boosting path is determined based on a boosting path of a control process in which no gas-liquid phase change of CO2 occurs, and a preferred set value is determined based on the set values ​​of the multiple parameters corresponding to the preferred boosting path.

10. The method according to claim 9, characterized in that The preferred pressure boosting path is determined based on a pressure boosting path where no CO2 gas-liquid phase change occurs and the temperature is lower than a predetermined value.

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