Carbon dioxide delivery conduit and method of use

Abstract

The invention provides a carbon dioxide conveying pipeline and a using method. The carbon dioxide delivery pipe according to the present invention comprises: a delivery pipe for delivering carbon dioxide; the heat preservation pipeline is arranged on the peripheral side of the conveying pipeline in a sleeving manner; the external pipeline defines a cooling cavity, the cooling cavity is provided with a first inlet and a first outlet, the first inlet is used for introducing a cooling medium into the cooling cavity, the first outlet is used for discharging the cooling medium in the cooling cavity, and the cooling medium in the cooling cavity is used for exchanging heat with the heat preservation pipeline; and an outlet of the cooling device communicates with the first inlet, and the cooling device is used for introducing a cooling medium with the temperature lower than that of the heat preservation pipeline into the cooling cavity. Therefore, the carbon dioxide conveying pipeline has the advantage that liquid carbon dioxide can be conveyed conveniently.

Description

Technical Field

[0001] The invention relates to the technical field of carbon dioxide transportation, and in particular to a carbon dioxide transportation pipeline and a use method thereof. Background Art

[0002] Carbon dioxide pipeline transportation is a pipeline built for the environmentally friendly and efficient transportation of carbon dioxide. The transportation of carbon dioxide through pipelines can reduce transportation costs and improve the convenience of transportation. However, when transporting carbon dioxide, since liquid carbon dioxide is a low-temperature gas, the pipeline for transporting carbon dioxide also needs to be kept at a low temperature. In related technologies, the temperature formed in the insulated pipeline will gradually increase, which is not conducive to the transportation of carbon dioxide. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a carbon dioxide delivery pipeline and a method of use.

[0004] The carbon dioxide delivery pipeline according to the embodiment of the present invention comprises:

[0005] A delivery pipeline, wherein the delivery pipeline is used to deliver carbon dioxide;

[0006] A heat-insulating pipe, wherein the heat-insulating pipe is sleeved on the outer peripheral side of the conveying pipe;

[0007] An external pipe, wherein the external pipe defines a cooling chamber, the cooling chamber has a first inlet and a first outlet, the first inlet is used to introduce a cooling medium into the cooling chamber, the first outlet is used to discharge the cooling medium in the cooling chamber, and the cooling medium in the cooling chamber is used to exchange heat with the insulation pipe;

[0008] A cooling device, wherein the outlet of the cooling device is connected to the first inlet, and the cooling device is used to introduce a cooling medium having a temperature lower than that of the insulation pipe into the cooling chamber.

[0009] Therefore, the carbon dioxide delivery pipeline according to the embodiment of the present invention has the advantage of being convenient for delivering liquid carbon dioxide.

[0010] In some embodiments, the cooling chamber is annular and is arranged on the outer circumference of the insulation pipe;

[0011] Alternatively, the cooling chamber is located outside the insulation pipe, and the cooling chamber extends spirally outside the insulation pipe along the extension direction of the insulation pipe.

[0012] In some embodiments, the external pipe includes an inner pipe, an outer pipe and a cooling pipe. The inner pipe is sleeved on the outer circumference of the insulation pipe, the inner pipe is fitted with the insulation pipe, the outer pipe is ringed on the outer circumference of the inner pipe, the outer circumference of the inner pipe and the inner surface of the outer pipe define a placement cavity, the cooling pipe is located in the placement cavity, the inner surface of the cooling pipe defines the cooling cavity, and the cooling pipe is wrapped around the outer surface of the inner pipe.

[0013] In some embodiments, the cooling medium is a gas;

[0014] The cooling device includes an exhaust pipe and a pressure relief valve. The inlet of the exhaust pipe is connected to the first outlet. The outlet of the exhaust pipe is located above the ground. The outlet of the exhaust pipe is provided with the pressure relief valve. A protective plate is provided on the top of the pressure relief valve.

[0015] In some embodiments, the cooling device includes a pump body, a filter element and a connecting pipe, the pump body, the filter element, the connecting pipe and the first inlet are connected in sequence, the delivery pipe is buried under the ground, the inlet of the pump body is located above the ground, and the filter element is used to filter impurities in the cooling medium.

[0016] In some embodiments, the cooling device includes a solar panel, and the solar panel is connected to the pump body to power the pump body;

[0017] The pump body is connected to the filter element through a transmission pipeline, and the extension direction of the transmission pipeline is perpendicular to the extension direction of the flow channel in the filter element;

[0018] The cooling device includes an outer shell, a mounting plate is provided on the outer surface of the external pipe, the lower end of the outer shell is connected to the mounting plate, the upper end of the outer shell is located above the ground, and the pump body, the transmission pipe, the filter element and the connecting pipe are all located in the cavity of the outer shell.

[0019] In some embodiments, the outer shell has a heat dissipation hole, the heat dissipation hole is located above the ground, and the heat dissipation hole is adjacent to the pump body;

[0020] An air intake housing is provided at the upper end of the outer shell, and the air intake housing has an air intake port;

[0021] The solar panel is supported and mounted on the air intake housing, and the solar panel is tilted.

[0022] In some embodiments, a thermometer is provided in at least one of the delivery pipe and the insulation pipe;

[0023] There are multiple external pipes and multiple cooling devices, and the multiple cooling devices are matched with the multiple external pipes in a one-to-one correspondence;

[0024] The length of the cooling chamber in the extension direction of the insulation pipe is less than or equal to 100 meters;

[0025] Optionally, the length of the cooling chamber in the extension direction of the insulation pipe is 30 meters, 50 meters or 100 meters.

[0026] The present invention also proposes a method for using the carbon dioxide delivery pipeline, comprising the following steps:

[0027] The delivery pipeline, the insulation pipeline and the external pipeline are buried underground, the inlet of the delivery pipeline is connected to the carbon dioxide delivery device, and the outlet of the delivery pipeline is connected to the carbon dioxide receiving device;

[0028] Connecting the outlet of the cooling device to the first inlet of the cooling chamber of the external pipeline;

[0029] The cooling device introduces a cooling medium into the cooling chamber at first preset time intervals;

[0030] and / or, when the temperature of the carbon dioxide in the delivery pipeline is greater than or equal to a second preset value, the cooling device introduces a cooling medium into the cooling chamber;

[0031] And / or, when the temperature of the insulation pipe is greater than or equal to a third preset value, the cooling device introduces a cooling medium into the cooling chamber.

[0032] In some embodiments, when the cooling device passes the cooling medium into the cooling chamber at intervals of a first preset time, the time for which the cooling device passes the cooling medium into the cooling chamber is greater than or equal to 20 minutes and less than or equal to 40 minutes. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a partial cross-sectional view of a carbon dioxide delivery pipeline according to an embodiment of the present invention.

[0034] Figure 2 Schematic diagram of a carbon dioxide delivery pipeline according to an embodiment of the present invention.

[0035] Figure 3 Schematic diagram of a carbon dioxide delivery pipeline according to an embodiment of the present invention.

[0036] Figure numerals: 1. External pipeline; 11. Cooling pipeline; 12. First outlet; 13. Placement cavity; 2. Insulation pipeline; 3. Delivery pipeline; 4. Mounting plate; 41. Exhaust pipeline; 42. Pressure relief valve; 43. Protective plate; 5. Outer shell; 51. Cavity; 52. Pump body; 53. Transmission pipeline; 54. Filter element; 55. Connecting pipeline; 6. Inlet shell; 7. Support frame; 8. Solar panel; 9. Inlet. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0038] The carbon dioxide delivery pipeline according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figures 1 to 3 As shown, the carbon dioxide delivery pipeline according to an embodiment of the present invention includes a delivery pipeline 3, an insulation pipeline 2, an external pipeline 1 and a cooling device.

[0039] The delivery pipeline 3 is used to deliver carbon dioxide. Specifically, the inlet of the delivery pipeline 3 is connected to the carbon dioxide delivery device, and the outlet of the delivery pipeline 3 is connected to the carbon dioxide receiving device, so as to deliver liquid carbon dioxide. The delivery pipeline 3 has wear resistance, low temperature resistance and corrosion resistance.

[0040] The insulation pipe 2 is sleeved on the outer peripheral side of the delivery pipe 3. Specifically, the insulation pipe 2 has a reflective layer, and the insulation pipe 2 is used to insulate the delivery pipe 3, thereby reducing the temperature of the delivery pipe 3 so that the delivery pipe 3 can maintain a low temperature state, thereby facilitating the delivery of liquid carbon dioxide. For example, the insulation pipe 2 uses a circular structure of pipeline insulation material, and a mesh sleeve is sleeved on the outer periphery of the insulation pipe 2 to prevent the insulation pipe 2 from spreading, and the length of the insulation pipe 2 is consistent with the length of the delivery pipe 3.

[0041] The external pipe 1 defines a cooling chamber, and the cooling chamber has a first inlet and a first outlet 12. The first inlet is used to introduce a cooling medium into the cooling chamber, and the first outlet 12 is used to discharge the cooling medium in the cooling chamber. The cooling medium in the cooling chamber is used to exchange heat with the insulation pipe 2. The outlet of the cooling device is connected to the first inlet, and the cooling device is used to introduce a cooling medium with a temperature lower than that of the insulation pipe 2 into the cooling chamber. In other words, when the temperature of the insulation pipe 2 is high, thereby affecting the low temperature state of the conveying pipe 3, the cooling device can introduce the cooling medium into the cooling chamber through the first inlet. The temperature of the cooling medium introduced into the cooling chamber is lower than the temperature of the insulation pipe 2. The cooling medium in the cooling chamber is used to exchange heat with the insulation pipe 2, thereby reducing the temperature of the insulation pipe 2, and then reducing the temperature of the conveying pipe 3, so as to transport liquid carbon dioxide.

[0042] Therefore, the carbon dioxide delivery pipeline according to the embodiment of the present invention has the advantage of being convenient for delivering liquid carbon dioxide.

[0043] In some embodiments, the cooling chamber is annular and is disposed on the outer circumference of the insulation pipe 2. For example, the outer pipe 1 is disposed on the outer circumference of the insulation pipe 2, and the outer pipe 1 defines an annular cooling chamber, and the extension direction of the cooling chamber is consistent with the extension direction of the insulation pipe 2.

[0044] like Figures 1 to 3 As shown, in some embodiments, the cooling chamber is located outside the insulation pipe 2, and the cooling chamber extends spirally outside the insulation pipe 2 along the extension direction of the insulation pipe 2. That is, the cooling chamber is a spiral structure extending spirally.

[0045] like Figures 1 to 3 As shown, in some embodiments, the external pipe 1 includes an inner pipe, an outer pipe and a cooling pipe 11, the inner pipe is sleeved on the outer peripheral side of the insulation pipe 2, the inner pipe fits the insulation pipe 2, the outer pipe is ringed on the outer peripheral side of the inner pipe, the outer peripheral surface of the inner pipe and the inner surface of the outer pipe define a placement cavity 13, the cooling pipe 11 is located in the placement cavity 13, the inner surface of the cooling pipe 11 defines a cooling cavity, and the cooling pipe 11 is wound on the outer surface of the inner pipe. As a result, when the cooling medium flows in the spiral cooling pipe 11, the insulation pipe 2 can be cooled.

[0046] In some embodiments, the cooling medium is a gas. For example, the cooling medium may be air, and the air with a reduced temperature may be introduced into the cooling pipe 11 .

[0047] like Figures 1 to 3 As shown, in some embodiments, the cooling device includes an exhaust pipe 41 and a pressure relief valve 42. The inlet of the exhaust pipe 41 is connected to the first outlet 12. The outlet of the exhaust pipe 41 is located above the ground. The outlet of the exhaust pipe 41 is provided with a pressure relief valve 42, and a protective plate 43 is provided on the top of the pressure relief valve 42. The protective plate 43 can reduce the problem of damage to the pressure relief valve 42 caused by external impact, so as to reduce the risk of damage to the pressure relief valve 42. The protective plate 43 is an annular structure, and the outer diameter of the protective plate 43 increases downward. As a result, the cooling medium (air) after heat exchange can be discharged from the pressure relief valve 42 of the exhaust pipe 41. The pressure relief valve 42 can realize automatic exhaust. The pressure relief valve 42 can automatically open when the temperature in the cooling chamber (cooling pipe 11) exceeds the preset safety value, release excess fluid or gas, thereby preventing damage or accidents caused by overpressure in the system.

[0048] like Figure 1As shown, in some embodiments, the cooling device includes a pump body 52, a filter 54 and a connecting pipe 55, the pump body 52, the filter 54, the connecting pipe 55 and the first inlet are connected in sequence, the delivery pipeline 3 is buried under the ground, the inlet of the pump body 52 is located above the ground, and the filter 54 is used to filter impurities in the cooling medium. For example, the pump body 52 is a micro negative pressure pump.

[0049] The pump body 52 is connected to the filter element 54 through the transmission pipe 53. The extension direction of the transmission pipe 53 is perpendicular to the extension direction of the flow channel in the filter element 54. Thus, the filtering effect can be ensured. For example, the filter element 54 is a filter tube with a filter net. The filter element 54 is detachably connected to the transmission pipe 53 and the connecting pipe 55. The transmission pipe 53 extends in the horizontal direction, and the extension direction of the flow channel in the filter element 54 is the up-down direction.

[0050] like Figures 1 to 3 As shown, in some embodiments, the cooling device includes an outer shell 5, a mounting plate 4 is provided on the outer surface of the external pipe 1, the lower end of the outer shell 5 is connected to the mounting plate 4, the upper end of the outer shell 5 is located above the ground, and the pump body 52, the transmission pipe 53, the filter 54 and the connecting pipe 55 are all located in the cavity 51 of the outer shell 5. Specifically, the mounting plate 4 is located on the upper surface of the external pipe 1, and the top surface of the mounting plate 4 is a plane. The extension direction of the outer shell 5 is the radial direction (up and down direction) of the transmission pipe 3. For example, the outer shell 5 is a rectangular shell. The exhaust pipe 41 is installed on the mounting plate 4.

[0051] In some embodiments, the outer shell 5 has a heat dissipation hole, which is located above the ground and adjacent to the pump body 52 .

[0052] like Figures 1 to 3As shown, in some embodiments, the cooling device includes a solar panel 8, and the solar panel 8 is connected to the pump body 52 to power the pump body 52. ​​Specifically, an air inlet housing 6 is provided at the upper end of the outer shell 5, and the air inlet housing 6 has an air inlet 9. The size of the cross section of the air inlet housing 6 perpendicular to the up and down direction is greater than the size of the cross section of the outer shell 5 perpendicular to the up and down direction, so that the air inlet flow rate of the air inlet 9 can be increased. The solar panel 8 is arranged on the air inlet housing 6 through the support frame 7, and the solar panel 8 is arranged obliquely. For example, the air inlet 9 is located at the top of the air inlet housing 6. For example, the pump body 52 (micro negative pressure pump) can be powered by the solar panel 8, and the electric energy can drive the pump body 52 (micro negative pressure pump) to work and generate negative pressure after being inverted by the inverter. The bottom end of the air inlet 9 and the input port of the pump body 52 (micro negative pressure pump) form a direct connection or a tubular connection. A plurality of heat dissipation holes are provided on the rear wall of the outer shell 5 corresponding to the installation position of the pump body 52 (micro negative pressure pump). In order to improve the maintenance convenience of the device, the installation position of the pump body 52 (micro negative pressure pump) is located on the ground. In order to reduce the energy consumption of the pump body 52 (micro negative pressure pump), the pump body 52 (micro negative pressure pump) is controlled by PLC to realize timed start. For example, the air intake housing 6 is a rectangular housing.

[0053] In some embodiments, a thermometer is provided in at least one of the delivery pipeline 3 and the insulation pipeline 2. The thermometer in the delivery pipeline 3 can measure the temperature of the delivered carbon dioxide, and the thermometer on the insulation pipeline 2 can measure the temperature of the insulation pipeline 2. Thus, the insulation pipeline 2 can be cooled down after the temperature of at least one of the delivered carbon dioxide and the insulation pipeline 2 increases. For example, thermometers are provided in both the delivery pipeline 3 and the insulation pipeline 2.

[0054] In some embodiments, there are multiple external pipes 1 and multiple cooling devices, and the multiple cooling devices are matched with multiple external pipes 1 in a one-to-one correspondence. The length of the cooling chamber in the extension direction of the insulation pipe 2 is less than or equal to 100 meters.

[0055] In some embodiments, the length of the cooling chamber in the extension direction of the insulation pipe 2 is 30 meters, 50 meters or 100 meters.

[0056] The present invention also proposes a method for using the carbon dioxide delivery pipeline according to an embodiment of the present invention. The method for using the carbon dioxide delivery pipeline according to an embodiment of the present invention comprises the following steps:

[0057] The delivery pipeline 3, the insulation pipeline 2 and the external pipeline 1 are buried underground, the inlet of the delivery pipeline 3 is connected to the carbon dioxide delivery device, and the outlet of the delivery pipeline 3 is connected to the carbon dioxide receiving device. The outlet of the cooling device is connected to the first inlet of the cooling chamber of the external pipeline 1.

[0058] Specifically, the outer shell 5 is installed on the mounting plate 4 on the surface of the external pipeline 1. The outer shell 5 is selected at a suitable height according to the pre-buried depth of the pipeline. The pump body 52 is installed in the outer shell 5, and the output port of the pump body 52 is connected to the transmission pipeline 53. At the same time, check whether the filter element in the filter element 54 is installed in place. (Increase the filtration particle size of the filter element) Then the air intake shell and the support frame 7 that jointly support the solar panel 8 are installed on the upper end of the outer shell 5, and the input port of the pump body 52 is connected to the air inlet 9; finally, backfill, and the pipeline is buried. After completing the backfilling operation, the user controls the carbon dioxide to enter the delivery pipeline 3 through the external control valve. The delivery pipeline 3 is buried underground with a low temperature. At the same time, due to the insulation of the insulation pipeline 2, the delivery pipeline 3 loses temperature slowly.

[0059] The cooling device introduces cooling medium into the cooling chamber at intervals of a first preset time; and / or, when the temperature of the carbon dioxide in the delivery pipe 3 is greater than or equal to a second preset value, the cooling device introduces cooling medium into the cooling chamber; and / or, when the temperature of the insulation pipe 2 is greater than or equal to a third preset value, the cooling device introduces cooling medium into the cooling chamber. In other words, the cooling medium can be introduced into the cooling chamber at regular intervals (at intervals of a first preset time) to reduce the temperature of the insulation pipe 2. The cooling device can also introduce cooling medium into the cooling chamber when the temperature of the carbon dioxide in the delivery pipe 3 is greater than or equal to the second preset value, that is, when the temperature of the carbon dioxide in the delivery pipe 3 is relatively high. The cooling device can also introduce cooling medium into the cooling chamber when the temperature of the insulation pipe 2 is greater than or equal to the third preset value, that is, when the temperature of the insulation pipe 2 is relatively high.

[0060] Specifically, after the solar panel 8 converts solar energy into electrical energy, the solar panel 8 supplies power to the pump body 52, the pump body 52 is turned on, and the pump body 52 generates negative pressure, so that the input port of the pump body 52 obtains fresh air from the air inlet 9, and the fresh air enters the transmission pipe 53 through the output port of the pump body 52, and is transported into the filter element 54 through the transmission pipe 53, contacts the air filter element in the filter element 54, and filters the fresh air, and the filtered fresh air enters the cooling pipe 11 through the connecting pipe 55.

[0061] Fresh air circulates in the cooling pipe 11. Since the cooling pipe 11 is wrapped around the inner pipe of the external pipe 1, the inner pipe of the external pipe 1 and the insulation pipe 2 fit tightly together. Therefore, the fresh air passing through the cooling pipe 11 can take away part of the heat conducted by the insulation pipe 2 in the external pipe 1, thereby avoiding the problem of temperature increase in the pipe body due to long-term insulation.

[0062] In some embodiments, when the cooling device passes the cooling medium into the cooling chamber at each first preset time interval, the time for the cooling device to pass the cooling medium into the cooling chamber is greater than or equal to 20 minutes and less than or equal to 40 minutes. For example, the time for the cooling device to pass the cooling medium into the cooling chamber each time is 30 minutes.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0067] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0068] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A carbon dioxide delivery pipeline, characterized in that: include: A delivery pipeline, wherein the delivery pipeline is used to deliver carbon dioxide; A heat-insulating pipe, wherein the heat-insulating pipe is sleeved on the outer peripheral side of the conveying pipe; An external pipe, wherein the external pipe defines a cooling chamber, the cooling chamber has a first inlet and a first outlet, the first inlet is used to introduce a cooling medium into the cooling chamber, the first outlet is used to discharge the cooling medium in the cooling chamber, and the cooling medium in the cooling chamber is used to exchange heat with the insulation pipe; A cooling device, wherein the outlet of the cooling device is connected to the first inlet, and the cooling device is used to introduce a cooling medium having a temperature lower than that of the insulation pipe into the cooling chamber.

2. The carbon dioxide delivery pipeline according to claim 1, characterized in that: The cooling chamber is annular and is arranged on the outer circumference of the insulation pipe; Alternatively, the cooling chamber is located outside the insulation pipe, and the cooling chamber extends spirally outside the insulation pipe along the extension direction of the insulation pipe.

3. The carbon dioxide delivery pipeline according to claim 2, characterized in that: The external pipe includes an inner pipe, an outer pipe and a cooling pipe. The inner pipe is sleeved on the outer circumference of the insulation pipe, the inner pipe is fitted with the insulation pipe, the outer pipe is arranged on the outer circumference of the inner pipe, the outer circumference of the inner pipe and the inner surface of the outer pipe define a placement cavity, the cooling pipe is located in the placement cavity, the inner surface of the cooling pipe defines the cooling cavity, and the cooling pipe is wrapped around the outer surface of the inner pipe.

4. The carbon dioxide delivery pipeline according to claim 1, characterized in that: The cooling medium is gas; The cooling device includes an exhaust pipe and a pressure relief valve. The inlet of the exhaust pipe is connected to the first outlet. The outlet of the exhaust pipe is located above the ground. The outlet of the exhaust pipe is provided with the pressure relief valve. A protective plate is provided on the top of the pressure relief valve.

5. The carbon dioxide delivery pipeline according to claim 4, characterized in that: The cooling device includes a pump body, a filter element and a connecting pipe. The pump body, the filter element, the connecting pipe and the first inlet are connected in sequence. The delivery pipe is buried under the ground, the inlet of the pump body is located above the ground, and the filter element is used to filter impurities in the cooling medium.

6. The carbon dioxide delivery pipeline according to claim 5, characterized in that: The cooling device comprises a solar panel, and the solar panel is connected to the pump body so as to supply power to the pump body; The pump body is connected to the filter element through a transmission pipeline, and the extension direction of the transmission pipeline is perpendicular to the extension direction of the flow channel in the filter element; The cooling device includes an outer shell, a mounting plate is provided on the outer surface of the external pipe, the lower end of the outer shell is connected to the mounting plate, the upper end of the outer shell is located above the ground, and the pump body, the transmission pipe, the filter element and the connecting pipe are all located in the cavity of the outer shell.

7. The carbon dioxide delivery pipeline according to claim 6, characterized in that: The outer shell has a heat dissipation hole, the heat dissipation hole is located above the ground, and the heat dissipation hole is adjacent to the pump body; An air intake housing is provided at the upper end of the outer shell, and the air intake housing has an air intake port; The solar panel is supported and mounted on the air intake housing, and the solar panel is tilted.

8. The carbon dioxide delivery pipeline according to any one of claims 1 to 7, characterized in that: A thermometer is provided in at least one of the conveying pipeline and the insulation pipeline; There are multiple external pipes and multiple cooling devices, and the multiple cooling devices are matched with the multiple external pipes in a one-to-one correspondence; The length of the cooling chamber in the extension direction of the insulation pipe is less than or equal to 100 meters; Optionally, the length of the cooling chamber in the extension direction of the insulation pipe is 30 meters, 50 meters or 100 meters.

9. A method for using the carbon dioxide delivery pipeline according to any one of claims 1 to 7, characterized in that: The following steps are involved: The delivery pipeline, the insulation pipeline and the external pipeline are buried underground, the inlet of the delivery pipeline is connected to the carbon dioxide delivery device, and the outlet of the delivery pipeline is connected to the carbon dioxide receiving device; Connecting the outlet of the cooling device to the first inlet of the cooling chamber of the external pipeline; The cooling device introduces a cooling medium into the cooling chamber at first preset time intervals; and / or, when the temperature of the carbon dioxide in the delivery pipeline is greater than or equal to a second preset value, the cooling device introduces a cooling medium into the cooling chamber; And / or, when the temperature of the insulation pipe is greater than or equal to a third preset value, the cooling device introduces a cooling medium into the cooling chamber.

10. The method for using the carbon dioxide delivery pipeline according to claim 9, characterized in that: When the cooling device passes the cooling medium into the cooling chamber at intervals of the first preset time, the time for the cooling device to pass the cooling medium into the cooling chamber is greater than or equal to 20 minutes and less than or equal to 40 minutes.

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