CO2 pipeline venting anti-freezing and blocking device and CO2 pipeline conveying system

Abstract

The application particularly relates to a CO2 pipeline emptying anti-freezing and blocking device and a CO2 pipeline conveying system, and belongs to the technical field of CO2 pipeline safety relief equipment. The CO2 pipeline emptying anti-freezing and blocking device comprises an input channel, a suction chamber, a mixing channel and an output channel. The outlet end of the input channel is accommodated in the suction chamber, and the suction chamber is provided with an air inlet channel. The inlet end of the mixing channel is in communication with the suction chamber, and the inlet end of the output channel is in communication with the outlet end of the mixing channel. The inner diameter of the output channel gradually increases from the inlet end of the output channel to the outlet end of the output channel. When the CO2 pipeline emptying anti-freezing and blocking device is emptied, the risk of a low-temperature environment generated during emptying can be reduced, and the emptying efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of CO2 pipeline safety venting equipment, specifically relating to a CO2 pipeline venting and anti-freezing device and a CO2 pipeline conveying system. Background Technology

[0002] Pipeline transport of supercritical CO2 is a method for large-scale CO2 transportation. However, when using pipelines for supercritical CO2 transport, pressure relief or venting is necessary in case of pipeline accidents or maintenance. During the venting process, supercritical CO2 undergoes a phase change, generating extremely low temperatures. The CO2 can form dry ice, potentially causing pipeline blockage or even brittle fracture, seriously threatening the safety of the pipeline and its auxiliary equipment. Currently, controlling the pipeline flow rate is often used to prevent these situations. However, limiting the flow rate reduces the venting rate, which is not conducive to rapid venting in emergencies. Summary of the Invention

[0003] The purpose of this invention is to provide a CO2 pipeline venting and antifreeze device and a CO2 pipeline transportation system, which can quickly vent the CO2 from the pipeline and reduce the risk of generating a low-temperature environment during venting.

[0004] To achieve the aforementioned objectives, the technical solution adopted by this invention is as follows: In one aspect, this application provides a CO2 pipeline venting and anti-freezing device, comprising an input channel, a suction chamber, a mixing channel, and an output channel. The outlet end of the input channel is housed within the suction chamber, which is provided with an air inlet channel. The inlet end of the mixing channel is connected to the suction chamber, and the inlet end of the output channel is connected to the outlet end of the mixing channel. From the inlet end to the outlet end of the output channel, the inner diameter of the output channel gradually increases.

[0005] In some embodiments, the inhalation chamber is provided with an exhaust channel, and the mixing channel is connected to the exhaust channel. The inner diameter of the exhaust channel gradually decreases from the inlet end to the outlet end of the exhaust channel.

[0006] In some embodiments, the inner diameter of the output end of the input channel gradually decreases.

[0007] In some embodiments, the input channel is provided with a first valve. In some embodiments, a drive assembly is also included, which drives the valve stem of the first valve to rotate. The drive assembly includes a motor, a flexible transmission cable, and a connecting component. The flexible transmission cable is used to transmit the torque from the output end of the motor to the valve stem, and the connecting component is used to connect the flexible transmission cable and the valve stem.

[0008] In some embodiments, the connecting component includes a fixed base, a screw portion, and a spiral sleeve. The fixed base is connected to the valve stem, the valve stem has a screw hole, the screw portion is threadedly connected to the screw hole, the screw portion is threadedly connected to the fixed base, the spiral sleeve has a spiral structure, the spiral sleeve is made of elastic material, the outer end of the spiral sleeve is connected to the fixed base, the inner end of the spiral sleeve is connected to the screw portion, and a flexible transmission cable passes through the interior of the spiral sleeve.

[0009] In some embodiments, the vortex sleeve includes a first layer and a second layer spaced apart, the ends of the first layer and the second layer are connected, the second layer is disposed on the side of the first layer away from the flexible transmission cable, the surface of the second layer facing the first layer is provided with a plurality of elastic protrusions, the first layer is provided with a plurality of through holes, and among the plurality of elastic protrusions, some elastic protrusions abut against the flexible transmission cable through the through holes, and some elastic protrusions abut against the first layer.

[0010] On the other hand, this application also provides a CO2 pipeline transportation system, including a main channel and the CO2 pipeline venting and anti-freezing device described in the above embodiments. Second valves are spaced apart in the main channel, and the input channel is connected to the portion of the main channel located between the second valves.

[0011] The present invention has the following beneficial effects:

[0012] 1. From the inlet end to the outlet end of the outlet channel, the inner diameter of the outlet channel gradually increases, which reduces the gas flow rate when CO2 is discharged through the outlet channel, thereby reducing the risk of generating a low-temperature environment during venting and improving venting efficiency.

[0013] 2. When venting, high-temperature gas is introduced and mixed with CO2, resulting in good heat exchange and increasing the temperature of CO2, thus reducing the risk of creating a low-temperature environment during venting.

[0014] 3. The structure is simple and reliable, and it is easy to assemble and disassemble. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the CO2 pipeline venting and antifreeze device of the present invention;

[0016] Figure 2 This is a schematic diagram of the connecting component of the present invention;

[0017] Figure 3 This is a schematic diagram illustrating the cooperation between the flexible transmission cable and the vortex sleeve of the present invention;

[0018] Figure 4 This is a schematic diagram of the vortex sleeve of the present invention;

[0019] Figure 5 This is a schematic diagram of the CO2 pipeline transportation system of the present invention.

[0020] Reference numerals: 1-Input channel, 2-Inhalation chamber, 3-Intake channel, 4-Mixing channel, 5-Output channel, 6-First valve, 7-Motor, 8-CO2 pipeline venting and anti-freezing device, 9-Valve stem, 10-Screw section, 11-Screw hole, 12-Fixing seat, 13-Flexible transmission cable, 14-Whirlpool sleeve, 15-First layer, 16-Second layer, 17-Elastic protrusion, 18-Main channel, 19-Second valve. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0022] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, 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, and therefore should not be construed as a limitation of this invention.

[0023] See Figure 1 On one hand, this application provides a CO2 pipeline venting and anti-freezing device 8, including an input channel 1, a suction chamber 2, a mixing channel 4, and an output channel 5. The outlet end of the input channel 1 is accommodated in the suction chamber 2, and the suction chamber 2 is provided with an air inlet channel 3. The inlet end of the mixing channel 4 is connected to the suction chamber 2, and the inlet end of the output channel 5 is connected to the outlet end of the mixing channel 4. From the inlet end of the output channel 5 to the outlet end of the output channel 5, the inner diameter of the output channel 5 gradually increases.

[0024] Input channel 1 is used to input CO2. Input channel 1 is connected to the pipeline that transports CO2, so that CO2 in the pipeline can enter input channel 1, and depressurization or venting operations can be performed through the venting and anti-freezing device of this application embodiment.

[0025] The intake passage 3 of the intake chamber 2 is used to input gas with a temperature higher than that of CO2 in the pipe to increase the temperature of CO2. For example, air can be input into the intake passage 3.

[0026] The high-temperature gases are mixed in mixing channel 4, which increases the temperature of CO2 and reduces the risk of creating a low-temperature environment during venting.

[0027] The outlet end of the input channel 1 is housed in the intake chamber 2. High-speed CO2 gas enters the intake chamber 2 and then enters the mixing channel 4, which generates a negative pressure at the intake channel 3, thereby allowing external gas to be drawn into the intake channel 3.

[0028] Output channel 5 is used to output CO2, thereby achieving depressurization or venting operations.

[0029] From the inlet end of the output channel 5 to the output end of the output channel 5, the inner diameter of the output channel 5 gradually increases, which reduces the gas flow rate when CO2 is discharged through the output channel 5, thereby reducing the risk of generating a low-temperature environment during venting.

[0030] When performing venting or depressurization operations using the venting and antifreeze device of this application embodiment, there is no need to control the gas flow rate to reduce the risk of generating a low-temperature environment during venting, thus improving venting efficiency.

[0031] See Figure 1 In some embodiments, the inhalation chamber 2 is provided with an exhaust channel, and the mixing channel 4 is connected to the exhaust channel. The inner diameter of the exhaust channel gradually decreases from the inlet end to the outlet end of the exhaust channel.

[0032] The gas in the intake chamber 2 is fed into the mixing channel 4 through the exhaust channel.

[0033] From the inlet end to the outlet end of the exhaust channel, the inner diameter of the exhaust channel gradually decreases, which increases the flow rate of CO2 in the mixing channel 4, thereby increasing the negative pressure effect generated in the suction chamber 2.

[0034] See Figure 1 In some embodiments, the inner diameter of the outlet end of input channel 1 gradually decreases.

[0035] The inner diameter of the outlet end of the input channel 1 gradually decreases, which increases the flow rate of CO2 in the suction chamber 2, thereby increasing the negative pressure effect generated in the suction chamber 2 and increasing the suction effect of high temperature gas.

[0036] See Figure 1 In some embodiments, the input channel 1 is provided with a first valve 6.

[0037] The first valve 6 facilitates the control of the opening and closing of the input channel 1.

[0038] The first valve 6 can be selected from existing products, and its structure and working principle are well known to those skilled in the art, and will not be described in detail here.

[0039] See Figure 1 , Figure 2 , Figure 3 and Figure 4In some embodiments, a drive assembly is also included for driving the valve stem 9 of the first valve 6 to rotate. The drive assembly includes a motor 7, a flexible transmission cable 13, and a connecting component. The flexible transmission cable 13 is used to transmit the torque from the output end of the motor 7 to the valve stem 9, and the connecting component is used to connect the flexible transmission cable 13 and the valve stem 9.

[0040] Commonly, in order to drive the valve stem 9 to rotate, the output end of the motor 7 is often directly connected to the valve stem 9. On the one hand, this increases the space occupied, and on the other hand, it limits the arrangement of the motor 7 and makes it inconvenient to set it up flexibly.

[0041] The output end of the motor 7 is connected to the valve stem 9 via a flexible transmission cable 13. Since the flexible transmission cable 13 can deform, it increases the flexibility of the position setting of the motor 7.

[0042] For example, the flexible transmission cable 13 can be a steel cable or a similar metal rope.

[0043] See Figure 1 , Figure 2 , Figure 3 and Figure 4 In some embodiments, the connecting component includes a fixed base 12, a screw portion 10, and a spiral sleeve 14. The fixed base 12 is connected to the valve stem 9, the valve stem 9 is provided with a screw hole 11, the screw portion 10 is threadedly connected to the screw hole 11, and the screw portion 10 is threadedly connected to the fixed base 12. The spiral sleeve 14 has a spiral structure and is made of elastic material. The outer end of the spiral sleeve 14 is connected to the fixed base 12, and the inner end of the spiral sleeve 14 is connected to the screw portion 10. A flexible transmission cable 13 passes through the interior of the spiral sleeve 14.

[0044] The mounting base 12 can be bolted to the valve stem 9.

[0045] The screw portion 10 is connected to the screw hole 11, allowing the screw portion 10 to be connected to the valve stem 9. The valve stem 9 may also be equipped with a locking component, which locks the screw portion 10 when it is connected to the valve stem 9, reducing the risk of relative rotation between the valve stem 9 and the flexible transmission cable 13 when the flexible transmission cable 13 rotates. The locking component can be selected from existing structures and will not be described in detail here.

[0046] The rotation axis of the screw section 10 can extend along the rotation axis of the valve stem 9.

[0047] Because the vortex sleeve 14 has a vortex structure, when the screw part 10 rotates relative to the fixed base 12, the screw part 10 will move relative to the fixed base 12, so that the inner end of the vortex sleeve 14 can move along the axial direction of the screw part 10. At the same time, the screw part 10 can drive the inner end of the vortex sleeve 14 to rotate, so that the vortex sleeve 14 can shrink. The vortex sleeve 14 can clamp the flexible transmission cable 13, so that the flexible transmission cable 13 can be fixed to the screw part 10. At the same time, it can generate a pulling force on the flexible transmission cable 13 towards the screw part 10, further improving the fixing effect of the flexible transmission cable 13.

[0048] For example, the screw part 10 may be provided with a socket, the flexible transmission cable 13 is inserted into the socket, and the spiral sleeve 14 can generate a clamping force on the flexible transmission cable 13 while also generating a pulling force on the flexible transmission cable 13 toward the socket, thereby improving the fixing effect of the flexible transmission cable 13.

[0049] Furthermore, in embodiments where the flexible transmission cable 13 is a steel cable, even if the surface of the flexible transmission cable 13 is irregular, the vortex sleeve 14 can still fix the flexible transmission cable 13 and reduce the risk of damaging the structure of the flexible transmission cable 13.

[0050] The vortex sleeve 14 is made of elastic material, which allows the interior of the vortex sleeve 14 to expand when the screw part 10 is reset relative to the fixed seat 12, making it easier to assemble and disassemble the flexible transmission cable 13.

[0051] For example, the vortex sleeve 14 can be made of spring steel.

[0052] See Figure 4 In some embodiments, the vortex sleeve 14 includes a first layer 15 and a second layer 16 spaced apart, with the ends of the first layer 15 and the second layer 16 connected. The second layer 16 is disposed on the side of the first layer 15 away from the flexible transmission cable 13. The surface of the second layer 16 facing the first layer 15 is provided with a plurality of elastic protrusions 17. The first layer 15 is provided with a plurality of through holes. Among the plurality of elastic protrusions 17, some elastic protrusions 17 abut against the flexible transmission cable 13 through the through holes, and some elastic protrusions 17 abut against the first layer 15.

[0053] The spiral sleeve 14 includes a first layer 15 and a second layer 16, and the ends of the two layers are connected, so that the spiral sleeve 14 has a sleeve-like structure. The advantage of this arrangement is that, on the one hand, it is easy to connect the spiral sleeve 14 to the fixed base 12 and the screw part 10. On the other hand, it increases the structural strength of the spiral sleeve 14.

[0054] The second layer 16 is provided with an elastic protrusion 17, which abuts against the flexible transmission cable 13 through a through hole, increasing the friction between the spiral sleeve 14 and the flexible transmission cable 13 and improving the fixing effect. Part of the elastic protrusion 17 abuts against the first layer 15, so that when the first layer 15 is tightly clamped to the flexible transmission cable 13, the flexible transmission cable 13 can be floatingly connected to the screw part 10, so that the spiral sleeve 14 can buffer the flexible transmission cable 13 and improve the transmission stability.

[0055] See Figure 5 On the other hand, this application also provides a CO2 pipeline transportation system, including a main channel 18 and the CO2 pipeline venting and anti-freezing device 8 in the above embodiments. The main channel 18 is provided with second valves 19 spaced apart, and the input channel 1 is connected to the portion of the main channel 18 located between the second valves 19.

[0056] The second valve 19 can control the opening and closing of the main channel 18.

[0057] In use, by closing the second valve 19 behind the conveying direction and opening the first valve 6 of the input channel 1, CO2 in the main channel 18 can enter the input channel 1, and the depressurization or venting operation can be completed through the CO2 pipeline venting and antifreeze device 8.

[0058] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A CO2 pipeline venting and anti-freezing device, characterized in that, include: Input channel (1); The inhalation chamber (2) is provided with an air intake channel (3), and the outlet end of the input channel (1) is accommodated in the inhalation chamber (2). The mixing channel (4) has its inlet end connected to the inhalation chamber (2); The inlet end of the output channel (5) is connected to the outlet end of the mixing channel (4). The inner diameter of the output channel (5) gradually increases from the inlet end to the outlet end of the output channel (5). The linkage control component (8) is used to simultaneously control the first valve (6) of the input channel (1) and the output channel (5); A drive assembly for driving the valve stem (9) of the first valve (6) to rotate, the drive assembly comprising: Motor (7); A flexible transmission cable (13) is used to transmit the torque from the output end of the motor (7) to the valve stem (9). A connecting component for connecting the flexible transmission cable (13) and the valve stem (9). The connecting component includes: A fixed seat (12) is connected to the valve stem (9); The screw part (10) is provided with a screw hole (11) on the valve stem (9). The screw part (10) is threadedly connected to the screw hole (11) and the screw part (10) is threadedly connected to the fixed seat (12). The vortex sleeve (14) has a vortex structure and is made of elastic material. The outer end of the vortex sleeve (14) is connected to the fixed base (12), and the inner end of the vortex sleeve (14) is connected to the screw part (10). The flexible transmission cable (13) passes through the inside of the vortex sleeve (14).

2. The CO2 pipeline venting and anti-freezing device according to claim 1, characterized in that, The inhalation chamber (2) is provided with an air outlet channel, and the mixing channel (4) is connected to the air outlet channel. The inner diameter of the air outlet channel gradually decreases from the inlet end to the outlet end.

3. The CO2 pipeline venting and anti-freezing device according to claim 1, characterized in that, The inner diameter of the outlet end of the input channel (1) gradually decreases.

4. The CO2 pipeline venting and anti-freezing device according to claim 1, characterized in that, The input channel (1) and the output channel (5) are respectively provided with a first valve (6).

5. The CO2 pipeline venting and anti-freezing device according to claim 1, characterized in that, The vortex sleeve (14) includes a first layer (15) and a second layer (16) spaced apart. The ends of the first layer (15) and the second layer (16) are connected. The second layer (16) is located on the side of the first layer (15) away from the flexible transmission cable (13). The surface of the second layer (16) facing the first layer (15) is provided with a plurality of elastic protrusions (17). The first layer (15) is provided with a plurality of through holes. Among the plurality of elastic protrusions (17), some of the elastic protrusions (17) abut against the flexible transmission cable (13) through the through holes, and some of the elastic protrusions (17) abut against the first layer (15).

6. A CO2 pipeline transportation system, characterized in that, include: Main channel (18), wherein a second valve (19) is provided at intervals in the main channel (18); The CO2 pipeline venting and antifreeze device (20) as described in any one of claims 1-5, wherein the input channel (1) and the main channel (18) are partially connected between the second valve (19).

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