A venting device for a CO2 transport pipeline

Abstract

The application discloses a kind of venting device suitable for CO2 delivery pipeline, the venting device includes delivery main pipe, air guide component, control valve and pressure monitoring component, branch pipe is provided on the delivery main pipe, venting cylinder is fixedly connected at the top of the branch pipe, and multiple venting pipes are set along the circumference of venting cylinder equidistantly;The air guide component includes multiple air deflectors corresponding to the outer end of venting pipe along the circumference of venting cylinder, and the air deflector is provided with an upwardly inclined guide groove;The control valve is fixedly connected to the branch pipe, and controls the opening or closing of the branch pipe;The pressure monitoring component is connected to the delivery main pipe, and real-time monitoring gas pressure in the delivery main pipe.The venting device can change the direction of gas radiation dispersion during CO2 venting process, improve the CO2 venting range, prevent CO2 vented to the external environment from gathering in the nearby area, and improve the safety of CO2 venting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of chemical equipment, in particular to a venting device suitable for CO2 conveying pipeline. BACKGROUND

[0002] CO2 is usually a colorless, odorless, tasteless, non-toxic gas, can be dissolved in water, solubility is 0.144g / 100g water at 25℃, the density is about 1.5 times of the atmosphere, for 100 % pure carbon dioxide, when the pressure is higher than the critical pressure 7.38 MPa, and the temperature is higher than the critical temperature 31.4℃, CO2 is in a supercritical state between gas and liquid phase, but when the pressure is higher than the critical pressure 7.38 MPa, the temperature is lower than the critical temperature 31.4℃, CO2 is in a dense liquid state, the corrosion of dense liquid state carbon dioxide is very strong, and with the decrease of external pressure, the volume of carbon dioxide expands, the temperature decreases, and the pressure decreases too fast, which will cause the temperature of carbon dioxide to drop sharply to form dry ice.

[0003] At present, carbon dioxide is widely used in production and life, and can be prepared by high temperature calcination of limestone or reaction of limestone and dilute hydrochloric acid, and is mainly used in refrigeration of perishable food, as refrigerant, manufacture of carbonated soft drinks and as homogeneous reaction solvent. Liquid carbon dioxide usually needs to be transported through pipeline. At present, when liquid carbon dioxide is transported through pipeline, in order to ensure the constant pressure inside the conveying pipeline, a pressure sensor is usually used to monitor the pressure inside the pipeline in real time, and artificial pressure relief is used. However, the diffusion range of carbon dioxide discharged to the external environment is limited, and it is easy to accumulate on the ground nearby, which has great safety hidden danger. SUMMARY

[0004] The purpose of the present application is to provide a venting device suitable for CO2 conveying pipeline, which can improve the venting space range during CO2 conveying, reduce the accumulation of CO2 on the ground nearby, and improve the safety of the conveying process.

[0005] Technical scheme: the venting device suitable for CO2 conveying pipeline comprises:

[0006] a conveying main pipe, a branch pipe is arranged on the conveying main pipe;

[0007] a venting cylinder, the venting cylinder is fixedly connected to the top end of the branch pipe, and a plurality of venting pipes are arranged at equal intervals along the circumference of the venting cylinder;

[0008] a wind guide assembly, the wind guide assembly comprises a plurality of wind guide plates arranged corresponding to the outer ends of the venting pipes along the circumference of the venting cylinder, and an inclined upward guide groove is arranged in the wind guide plate;

[0009] a control valve fixedly connected to the branch pipe and capable of controlling opening or closing of the branch pipe;

[0010] a pressure monitoring assembly connected to the main pipe and capable of monitoring gas pressure in the main pipe in real time.

[0011] Preferably, the control valve is an electric valve; the pressure monitoring assembly comprises a pressure sensor fixedly connected to the branch pipe and a controller electrically connected to the pressure sensor, and the controller is electrically coupled to the control valve.

[0012] Preferably, the venting device further comprises a pressure relief assembly, the pressure relief assembly comprising a regulating disc slidingly and liftable connected in the venting cylinder, and a plurality of air holes are arranged on the regulating disc;

[0013] A plurality of guide sliding rods penetrating the top end of the venting cylinder are arranged on the disc surface of the regulating disc, a limiting block is arranged at the top end of the guide sliding rod, and a tension spring is sleeved on the guide sliding rod between the limiting block and the top surface of the venting cylinder.

[0014] Preferably, end shafts are arranged at both ends of the wind deflector, the wind deflector is rotatably clamped between two support arms fixedly connected to the outer wall of the venting cylinder through the two end shafts, and a transmission gear is fixedly sleeved on one end shaft;

[0015] A connecting rod is fixedly connected to the top end of the limiting block, and a drive rack engaged with the transmission gear for transmission is arranged at the free end of the connecting rod;

[0016] The lifting action of the guide sliding rod drives the drive rack to lift, thereby driving the transmission gear to rotate and driving the wind deflector to rotate and adjust the windward surface at an angle of 0°-45° along the axial direction thereof.

[0017] Preferably, the venting device further comprises a heating assembly, the heating assembly comprising a heating pipe spirally arranged along the inner wall of the venting cylinder, and an air suction pump and a heating tank arranged on the main pipe;

[0018] The heating tank is in communication with the inlet end of the heating pipe through a conveying pipe, and cold air is heated and conveyed to the heating pipe.

[0019] Preferably, the heating tank comprises a tank body, a driving shaft is vertically rotatably connected in the tank body, and a plurality of friction plates are circumferentially arranged on the driving shaft;

[0020] Friction blocks are fixedly connected to the inner walls on both sides of the tank body, and the friction plates are rotated to generate heat by friction with the friction blocks to heat cold air.

[0021] Preferably, a first support plate is fixedly arranged on the outer side wall surface of each wind deflector, and a plurality of high-pressure nozzles are fixedly connected to the first support plate;

[0022] The venting cylinder is provided with a distribution ring pipe in communication with the high-pressure nozzle of each deflector, and the distribution ring pipe is in communication with the outlet end of the heating pipe through a connecting pipe.

[0023] Preferably, the venting device further comprises an electric switch assembly for controlling the opening and closing of the air suction pump, and the electric switch assembly is arranged outside the venting cylinder.

[0024] The electric switch assembly comprises a rotating shaft which is longitudinally connected to one of the venting pipes, and the rotating shaft is sleeved with an impeller inside the venting pipe, the lower end of the rotating shaft is rotatably connected to a second supporting plate, and one end of the second supporting plate is fixedly connected to the outer wall of the venting cylinder.

[0025] A centrifugal block is fixedly connected to the center of the rotating shaft, a hollow cavity is formed in one end of the centrifugal block, a supporting spring is fixedly connected to the inner side of the hollow cavity, a sliding plate which slides along the hollow cavity is connected to the end of the supporting spring, and a first conductive sheet is fixedly connected to the outer side of the sliding plate; and a second conductive sheet corresponding to the first conductive sheet is arranged on the outer side of the hollow cavity.

[0026] Preferably, the electric switch assembly is further provided with a power control assembly.

[0027] The power control assembly comprises a guide rod arranged at the top end of the venting cylinder, a fixed wire is arranged at the top end of the guide rod, a movable wire is slidably connected to the guide rod, and one end of the movable wire is fixedly connected to the top end of a guide sliding rod.

[0028] The fixed wire and the movable wire are electrically connected to the first conductive sheet and the second conductive sheet, respectively.

[0029] Preferably, the inlet end of the air suction pump is provided with an activated carbon filter screen.

[0030] Compared with the prior art, the present application has the following advantages:

[0031] 1. The venting device has high integration and automation, can change the radiation dispersion direction of the CO2 during the venting process, improve the CO2 venting range, prevent the CO2 vented to the external environment from gathering in the nearby area, and improve the safety of CO2 venting.

[0032] 2. The pressure relief assembly in the embodiment of the present application can realize the buffering and adjustment of the CO2 gas pressure in the venting cylinder by adjusting the up-and-down floating of the adjusting disc, so as to avoid the rapid expansion of the CO2 gas volume in the venting cylinder and the formation of dry ice to block the venting pipe.

[0033] 3. The air deflector assembly is arranged in cooperation with the pressure relief assembly in the embodiment of the present application, the deflector plate in the air deflector assembly can be driven to rotate along the axial direction by the end transmission gear to adjust the windward surface angle, and the CO2 venting range is further improved.

[0034] 4、The heating assembly of the embodiment of the application can suck air and heat the air, the heating pipe heats the discharge cylinder through heat conduction, effectively preventing the generation of dry ice due to excessive temperature drop when CO2 is discharged into the discharge cylinder, and improving the discharge efficiency of CO2; in addition, the hot air after heat exchange is further heated and boosted to the escaping CO2 in cooperation with the air guide plate rotating along the axial direction during the discharge process, further improving the CO2 discharge range;

[0035] 5、The air suction pump of the embodiment of the application is provided with an electric switch assembly and a power control assembly, and through cooperation of the electric switch assembly and the pressure relief assembly, the air suction pump can be started or turned off when CO2 is discharged, so as to realize an automatic control process and reduce the misoperation of the equipment caused by personnel negligence; the power control assembly can adjust the rotating speed of the air suction pump during the working process, so as to reduce the energy consumption of the air suction pump while meeting the movement of the equipment during the discharge process. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 It is a first view structure schematic diagram of the CO2 discharge device of the application.

[0037] Figure 2 It is a second view structure schematic diagram of the CO2 discharge device in the application. Figure 1

[0038] It is a radial structure sectional view of the discharge device in the application. Figure 3 Figure 1 It is a main view of the discharge device structure in the application.

[0039] Figure 4 Figure 3 It is a main view of the discharge device structure in the application.

[0040] Figure 5 It is a structure schematic diagram of the air guide assembly in the application. Figure 1

[0041] It is an enlarged structure schematic diagram of A in the application. Figure 6 Figure 2 It is an enlarged structure schematic diagram of B in the application.

[0042] Figure 7 Figure 4

[0043] REFERENCE SIGNS:

[0044] 1、Conveying main pipe; 11, branch pipe;

[0045] 2、Discharge cylinder; 21, discharge pipe;

[0046] 3、Control valve;

[0047] 4、Pressure monitoring assembly; 41, controller; 42, pressure sensor;​​​​​

[0048] 5, heating assembly; 51, suction pump; 511, activated carbon filter; 52, heating tank; 521, tank body; 522, drive shaft; 523, friction plate; 524, friction block; 53, conveying pipe; 54, heating pipe; 55, connecting pipe; 56, distribution ring pipe; 57, first support plate; 58, high-pressure nozzle;

[0049] 6, air guide assembly; 61, support arm; 62, air guide plate; 621, end shaft; 63, transmission gear; 64, connecting rod; 65, drive rack;

[0050] 7, pressure relief assembly; 71, control disc; 711, air hole; 72, guide slide rod; 73, limit block; 74, tension spring;

[0051] 8, electrical switch assembly; 81, second support plate; 82, rotating shaft; 83, impeller; 84, centrifugal block; 85, hollow cavity; 86, sliding plate; 87, support spring; 88, first conductive sheet; 89, second conductive sheet;

[0052] 9, power control assembly; 91, guide rod; 92, fixed wire; 93, movable wire. DETAILED DESCRIPTION

[0053] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the following will combine the drawings of the embodiments of the present application to make the above-mentioned and other objects, features and advantages of the present application more clear. Figures 1-7 The technical scheme of the embodiments of the present application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, not all the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those skilled in the art belong to the scope of protection of the present application. Embodiment 1

[0054] As Figures 1-4As shown, the emptying device for CO2 conveying pipeline of the present application comprises a conveying main pipe 1, a branch pipe 11 arranged on the conveying main pipe 1, and an emptying cylinder 2 fixedly connected to the top end of the branch pipe 11. The diameter of the emptying cylinder 2 is greater than the outer diameter of the branch pipe 11, and a plurality of emptying pipes 21 are arranged at equal intervals along the circumference of the emptying cylinder 2 and horizontally arranged radially along the emptying cylinder 2. The emptying device comprises a wind guide assembly 6, which comprises a plurality of wind guide plates 62 arranged at equal intervals along the circumference of the emptying cylinder 2 and corresponding to the outer ends of the emptying pipes 21. Each wind guide plate 62 is arranged corresponding to the outer end of an emptying pipe 21, and an inclined guide groove is arranged in the wind guide plate 62. A control valve 3 is fixedly connected to the branch pipe 11. The control valve 3 can be an electric valve, which can control the opening or closing of the branch pipe 11. A pressure monitoring assembly 4 is connected to the conveying main pipe 1. The pressure monitoring assembly 4 comprises a pressure sensor 42 fixedly connected to the branch pipe and a controller 41 electrically connected to the pressure sensor. The pressure sensor 42 can monitor the gas pressure in the conveying main pipe 1 in real time, and the controller 41 is electrically coupled to the control valve 3.

[0055] In operation, when CO2 liquid is conveyed in the conveying main pipe 1, the pressure in the conveying main pipe 1 can be monitored in real time by the pressure sensor 42 to ensure the safety of the CO2 liquid conveying process. When the pressure in the conveying main pipe 1 increases, the pressure sensor 42 transmits a signal to the controller 41, which controls the control valve 3 to open the branch pipe 11, thereby releasing carbon dioxide into the emptying cylinder 2 through the branch pipe 11. A one-way valve (not shown in the figure) is arranged on the branch pipe 11. The volume of CO2 in the emptying cylinder 2 rapidly expands and is sprayed on the corresponding wind guide plate 62 through the emptying pipe 21. The shape of the guide groove can be L-shaped. When the CO2 gas flows along the guide groove, it is blocked and the wind direction is changed, so that the CO2 gas is radiated and dispersed upwards, thereby improving the CO2 emptying range and preventing the CO2 emptied to the external environment from gathering in the nearby area, thereby improving the safety of CO2 emptying. When the pressure in the conveying main pipe 1 after CO2 emptying is below a predetermined value, the controller 41 controls the control valve 3 to close, thereby stopping the CO2 emptying. Example 2:

[0056] Based on Example 1, as shown in Figure 3 The emptying device further comprises a pressure relief assembly 7, which comprises a regulating disc 71 slidably connected in the emptying cylinder 2, and a plurality of air holes 711 are arranged on the regulating disc 71. A plurality of guide sliding rods 72 are arranged on the surface of the regulating disc 71 and penetrate the top end of the emptying cylinder 2. Limiting blocks 73 are arranged at the top end of the guide sliding rods 72, and a tension spring 74 is sleeved on the guide sliding rods 72 between the limiting blocks 73 and the top surface of the emptying cylinder 2.

[0057] The pressure relief assembly 7 in this embodiment, during the venting process, when the branch pipe 11 flows into the venting cylinder 2, the pressure inside the venting cylinder 2 is initially greater on the lower side of the regulating disc 71, the CO2 gas pushes the regulating disc 71 to move upward and drives the guide slide rod 72 to slide upward, and the guide slide rod 72 can stretch the tension spring 74 when it moves upward; when the pressure on the lower side of the venting cylinder 2 decreases, the guide slide rod 72 moves downward under the action of the tension spring 74 and drives the regulating disc 71 to reset downward, thereby achieving the buffering and adjustment of the CO2 gas pressure inside the venting cylinder 2, avoiding the rapid expansion of the CO2 gas volume inside the venting cylinder 2 to form dry ice to block the venting pipe 21. It should be noted that during the CO2 venting process, the regulating disc 71 is in a relatively stable state when the initial pressure is relatively large, and as the CO2 pressure decreases, the regulating disc 71 is in an up-and-down oscillation state until it moves downward to the initial position after the venting stops. Embodiment 3:

[0058] Based on Embodiment 1 and Embodiment 2, as shown in Figure 5 , the air deflector 62 is provided with end shafts 621 at both ends, the air deflector 62 is rotatably clamped between the two support arms 61 fixedly connected to the outer wall of the venting cylinder through the two end shafts 621, and a transmission gear 63 is fixedly sleeved on one of the end shafts 621 of the air deflector 62. A connecting rod 64 is fixedly connected to the top end of the limiting block 73, and a drive rack 65 is vertically arranged at the other end of the connecting rod 64, and the drive rack 65 is in meshing transmission connection with the transmission gear 63. During the lifting process of the regulating disc 71, the drive rack 65 can be driven to lift by the lifting action of the guide slide rod 72, and then the transmission gear 63 can be driven to rotate, and the air deflector 62 can be driven to rotate and adjust the windward surface at an angle of 0°-45° along its axial direction, that is, the angle of the guide groove is adjusted.

[0059] During the pressure relief process of the pressure relief assembly 7 in this embodiment, the CO2 gas flows through the air holes 711 to push the regulating disc 71 to rise, and then the air deflector 62 is adjusted at an angle of 0°-45° by the guide slide rod 72. The high-pressure gas flow flowing through the air holes 711 and the multiple venting pipes 21 is sprayed on the guide groove of the air deflector 62, and after the air deflector 62 is rotated and inclined, the high-pressure gas flow can be further changed in flow direction, so that the discharged CO2 gas can be dispersed in all directions at an inclination angle of 45° or less when it contacts the air deflector 62, further improving the CO2 venting range, effectively preventing CO2 from settling and gathering, and further improving the safety of CO2 venting. Embodiment 4:

[0060] Based on Embodiment 1, as shown in Figure 2 and Figure 6As shown, the venting device further comprises a heating assembly 5, the heating assembly 5 comprising a heating pipe 54 spirally arranged along the inner wall of the venting cylinder 2, and a suction pump 51 and a heating tank 52 arranged on the conveying main pipe 1, the suction pump 51 being provided with an activated carbon filter screen 511 at the inlet end. The heating tank 52 comprises a tank body 521, the tank body 521 being vertically rotatably connected with a driving shaft 522, and the driving shaft 522 being circumferentially provided with a plurality of friction plates 523; the tank body 521 is fixedly connected with friction blocks 524 on the inner walls of both sides, and the friction plates 523 are rotatably in friction with the friction blocks 524 to generate heat for heating the cold air. The heating tank 52 is in communication with the inlet end of the heating pipe 54 through a conveying pipe 53, and the cold air is heated and conveyed to the heating pipe 54.

[0061] The heating assembly 5 in the embodiment, when the suction pump 51 is started to intake air, the activated carbon in the activated carbon filter screen 511 has a developed gap structure and rich microporous organization, and these microporous organizations have strong adsorption force field, when the air contacts the activated carbon, the activated carbon micropores can adsorb the particulate matters in the air into the micropores, thereby realizing purification of the air and preventing the suction pump 51 from being blocked by the impurities. When the purified gas flows through the heating tank 52, the gas drives the driving shaft 522 to rotate through the friction plates 523, and then the friction plates 523 are in friction with the friction blocks 524 to generate heat, thereby heating the flowing gas, and then when the heated hot air flows through the spiral heating pipe 54, the heating pipe 54 can be made of copper which has good heat conduction performance, the heating pipe 54 heats the venting cylinder 2 through heat conduction mode, effectively preventing the dry ice from being generated due to too large temperature drop when the CO2 venting enters the venting cylinder 2, and improving the venting efficiency of the CO2. Embodiment 5:

[0062] Based on the embodiments 3 and 4, as shown in Figure 2 and Figure 5 Each deflector 62 is fixedly provided with a first support plate 57 on the outer side wall surface, and a plurality of high-pressure nozzles 58 are fixedly connected on the first support plate 57; the venting cylinder 2 is provided with a distribution ring pipe 56 which is in communication with the high-pressure nozzles 58 of each deflector, and the distribution ring pipe 56 is in communication with the outlet end of the heating pipe 54 through a connecting pipe 55. It should be noted that the distribution ring pipe 56 can be a flexible pipe to avoid interference with the rotation of the deflector 62.

[0063] During operation, after the hot air flowing through the heating pipe 54 exchanges heat with the CO2 gas in the venting cylinder 2, it still retains a relatively high heat level compared to the CO2 gas. The hot air discharged from the heating pipe 54 enters the distribution ring pipe 56 through the connecting pipe 55 for distribution and is then ejected through the high-pressure nozzle 58. Since the high-pressure nozzle 58 is aligned with the outlet direction of the guide groove of the air guide plate 62, regardless of whether a fixed-direction air guide plate 62 or a rotatable and adjustable-angle air guide plate 62 is used, the high-pressure air ejected through the high-pressure nozzle 58 mixes with the CO2 gas whose flow direction has been changed by the air guide plate 62. This not only propels the upward-dispersing CO2 gas, improving the radiation dispersion effect of the CO2 gas, but also heats the CO2 gas whose flow direction has been changed by the air guide plate 62. The CO2 gas expands in volume and decreases in density when heated, further increasing the CO2 gas dispersion radius and improving the dispersion effect and safety of the vented CO2. Example 6:

[0064] Based on Example 4, such as Figure 4 and Figure 7 As shown, the venting device also includes an electrical switch assembly 8 that controls the opening or closing of the intake pump 51. The electrical switch assembly 8 is located on the outside of the venting cylinder 2. The electrical switch assembly 8 includes a rotating shaft 82 that is rotatably connected longitudinally to one of the venting pipes 21 in the circumferential direction of the venting cylinder 2. An impeller 83 is fitted inside the venting pipe on the rotating shaft 82. The lower end of the rotating shaft 82 is rotatably connected to a second support plate 81. One end of the second support plate 81 is fixedly connected to the outer wall of the venting cylinder 2. A centrifugal block 84 is fixedly connected to the center of the rotating shaft 82. A hollow cavity 85 is opened at one end of the centrifugal block 84. A support spring 87 is fixedly connected to the inside of the hollow cavity 85. A sliding plate 86 that slides along the hollow cavity is connected to the end of the support spring 87. A first conductive plate 88 is fixedly connected to the outside of the sliding plate 86. A second conductive plate 89 corresponding to the first conductive plate is provided on the outside of the hollow cavity 85.

[0065] It should be noted that a rotating conductive disk (not shown in the figure) is provided on the second support plate 81. The rotating conductive disk adopts existing technology, and its function is to ensure that power can still be supplied when the electrical device is rotating. The shaft 82 has a cavity at its center. The first conductive plate 88 and the second conductive plate 89 are respectively connected to wires. The two wires pass through the cavity of the shaft 82 and are electrically connected to the rotating conductive disk, which is electrically connected to the suction pump 51. When the first conductive plate 88 and the second conductive plate 89 are separated, the suction pump 51 is disconnected. When the first conductive plate 88 and the second conductive plate 89 are in contact, the circuit of the suction pump 51 is connected and it starts to work.

[0066] In this embodiment, when CO2 is vented, the flow through the vent pipe 21 pushes the impeller 83 to rotate at high speed, driving the rotating shaft 82 to rotate, and the centrifugal block 84 rotates, generating centrifugal force when rotating, and the sliding plate 86 in the centrifugal block 84 slides outward under the action of centrifugal force to approach the second conductive sheet 89, and stretches the supporting spring 87, until the sliding plate 86 drives the first conductive sheet 88 to contact the second conductive sheet 89, and the control circuit of the air suction pump 51 is connected, the air suction pump 51 is started to suck external air, and the heating process is started. When CO2 venting is stopped, no gas flows through the vent pipe 21, the rotating shaft 82 and the centrifugal block 84 thereon slowly stop rotating, so that the centrifugal force generated by the rotation of the centrifugal block disappears, and then the stretched supporting spring 87 rebounds to pull the sliding plate 86 away from the second conductive sheet 89 and reset, so that the first conductive sheet 88 and the second conductive sheet 89 are separated, the circuit is cut off, and the air suction pump 51 is turned off, effectively preventing the staff from forgetting to turn off the air suction pump 51 after CO2 venting is stopped, causing damage to the equipment and waste of energy. Embodiment 7:

[0067] Based on Embodiment 2 and Embodiment 6, as shown in Figures 1-4 The electric switch assembly 8 is matched with a power control assembly 9, the power control assembly 9 includes a guide rod 91 arranged at the top end of the venting cylinder 2, a fixed wire 92 is arranged at the top end of the guide rod 91, a movable wire 93 is slidably connected to the guide rod 91, and one end of the movable wire 93 is fixedly connected to the top end of the guide slide rod 72. The fixed wire 92 and the movable wire 93 are electrically connected to the first conductive sheet 88 and the second conductive sheet 89, respectively. It should be noted that the fixed wire 92, the movable wire 93, the air suction pump 51, the first conductive sheet 88, the second conductive sheet 89 and the rotating conductive disc are connected in series in the same control circuit, the distance between the fixed wire 92 and the movable wire 93 can control the rotating speed of the air suction pump 51, and the connection or disconnection of the first conductive sheet 88 and the second conductive sheet 89 can control the start or stop of the air suction pump 51.

[0068] In this embodiment, when the CO2 transported in the main pipe 1 is released, the CO2 gas flows through the branch pipe 11, the air hole 711 and the vent pipe 21 in turn. If the air hole 711 is blocked or the diameter of the air hole 711 is reduced due to the generation of dry ice caused by excessive temperature drop of the CO2, the discharge of CO2 will be affected. Consequently, the air pressure in the vent cylinder 2 under the control disc 71 increases, which pushes the control disc 71 to rise and drives the guide slide rod 72 to move upwards and stretch the tension spring 74. At this time, the guide slide rod 72 drives the movable conductor 93 to slide along the guide rod 91 towards the fixed conductor 92. The shorter the distance between the movable conductor 93 and the fixed conductor 92, the smaller the resistance of the circuit, and the faster the speed of the suction pump 51, i.e. the greater the amount of external air sucked by the suction pump 51, the greater the amount of hot air passing through the heating tank 52 and the heating pipe 54, and the better the heating effect on the vent cylinder 2, so that the dry ice is dissolved. After the dry ice in the blocked or reduced air hole 711 is dissolved, the air pressure in the vent cylinder 2 under the control disc 71 decreases, and the stretched tension spring 74 drives the guide slide rod 72 to move downwards, which drives the control disc 71 to slide downwards in the vent cylinder 2 and return to the original position. At the same time, the guide slide rod 72 drives the movable conductor 93 to move downwards along the guide rod 91 away from the fixed conductor 92. The farther the distance between the movable conductor 93 and the fixed conductor 92, the greater the resistance of the circuit, and the slower the speed of the suction pump 51, i.e. the smaller the amount of external air sucked by the suction pump 51, so as to adjust the energy consumption of the heating assembly during the heating process.

[0069] The above is the preferred embodiment of the present application. It should be noted that those skilled in the art can make some improvements and refinements without departing from the principles of the present application, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A venting device suitable for CO2 conveying pipelines, characterized in that, The venting device includes: The main conveying pipe (1) is provided with a branch pipe (11). Vent cylinder (2), the vent cylinder (2) is fixedly connected to the top of the branch pipe (11), and multiple vent pipes (21) are arranged at equal intervals along the circumference of the vent cylinder (2). The air guide assembly (6) includes a plurality of air guide plates (62) arranged along the circumference of the venting cylinder (2) and corresponding to the outer end of the venting pipe. The air guide plates (62) are provided with upward inclined guide grooves. Control valve (3), which is fixedly connected to branch pipe (11) to control the opening or closing of branch pipe (11); Pressure monitoring component (4), which is connected to the conveying main pipe (1) and monitors the gas pressure inside the conveying main pipe (1) in real time; The venting device also includes a pressure relief assembly (7), which includes a control plate (71) that is slidably and vertically connected to the venting cylinder (2), and the control plate (71) is provided with multiple air holes (711). The control panel (71) is provided with multiple guide rods (72) that penetrate the top of the venting cylinder (2). The top of the guide rod (72) is provided with a limit block (73), and a tension spring (74) is fitted on the guide rod (72) between the limit block (73) and the top surface of the venting cylinder (2). The air guide plate (62) is provided with end shafts (621) at both ends, and the air guide plate (62) is rotatably clamped between two support arms (61) that are fixedly connected to the outer wall of the venting cylinder through the two end shafts (621); a transmission gear (63) is fixedly fitted on one end shaft (621). The top of the limiting block (73) is fixedly connected to a connecting rod (64), and the free end of the connecting rod (64) is provided with a drive rack (65) that meshes with the transmission gear (63). The guide rod (72) lifts and lowers, which drives the drive rack (65) to lift and lower, thereby driving the transmission gear (63) to rotate and drive the wind guide plate (62) to rotate along its axis at an angle of 0°-45° to adjust the windward surface.

2. The venting device for CO2 conveying pipelines according to claim 1, characterized in that, The control valve (3) is an electric valve; the pressure monitoring assembly (4) includes a pressure sensor (42) fixedly connected to the branch pipe and a controller (41) electrically connected to the pressure sensor, and the controller (41) is electrically coupled to the control valve (3).

3. The venting device for CO2 conveying pipelines according to claim 1, characterized in that, The venting device also includes a heating assembly (5), which includes a heating pipe (54) spirally arranged along the inner wall of the venting cylinder (2), and an air pump (51) and a heating tank (52) arranged on the conveying main pipe (1). The heating tank (52) is connected to the inlet end of the heating tube (54) through the delivery pipe (53) and delivers heated cold air to the heating tube (54).

4. The venting device for CO2 conveying pipelines according to claim 3, characterized in that, The heating tank (52) includes a tank body (521), and a drive shaft (522) is vertically rotatably connected inside the tank body (521), and multiple friction plates (523) are arranged circumferentially on the drive shaft. Friction blocks (524) are fixedly connected to the inner walls on both sides of the tank (521). The friction plate (523) rotates and rubs against the friction block (524) to generate heat and heat the cold air.

5. The venting device for CO2 conveying pipelines according to claim 3, characterized in that, Each of the air guide plates (62) has a first support plate (57) fixedly installed on its outer wall surface, and a plurality of high-pressure nozzles (58) are fixedly connected to the first support plate (57). The venting cylinder (2) is provided with a distribution ring pipe (56) on its outer periphery, which is connected to the high-pressure nozzle (58) of each air guide plate. The distribution ring pipe (56) is connected to the outlet end of the heating pipe (54) through a connecting pipe (55).

6. The venting device for CO2 conveying pipelines according to claim 3, characterized in that, The venting device also includes an electrical switch assembly (8) for controlling the opening or closing of the intake pump (51), the electrical switch assembly (8) being disposed outside the venting cylinder (2); The electrical switch assembly (8) includes a rotating shaft (82) that is rotatably connected to a vent pipe (21) thereon, and an impeller (83) is fitted inside the vent pipe. The lower end of the rotating shaft (82) is rotatably connected to a second support plate (81), and one end of the second support plate (81) is fixedly connected to the outer wall of the vent cylinder (2). A centrifugal block (503) is fixedly connected to the center of the rotating shaft (82). A hollow cavity (85) is opened at one end of the centrifugal block (503). A support spring (87) is fixedly connected to the inner side of the hollow cavity (85). A sliding plate (86) that slides along the hollow cavity is connected to the end of the support spring (87). A first conductive sheet (88) is fixedly connected to the outer side of the sliding plate (86). A second conductive sheet (89) corresponding to the first conductive sheet is provided on the outer side of the hollow cavity (85).

7. The venting device for CO2 conveying pipelines according to claim 6, characterized in that, The electrical switching assembly (8) is equipped with a power control assembly (9); The power control component (9) includes a guide rod (91) disposed at the top of the venting cylinder (2), a fixed wire (92) is disposed at the top of the guide rod (91), a movable wire (93) is slidably connected to the guide rod (91), and one end of the movable wire (93) is fixedly connected to the top of a guide rod (72). The fixed wire (92) and the movable wire (93) are electrically connected to the first conductive sheet (88) and the second conductive sheet (89), respectively.

8. The venting device for CO2 conveying pipelines according to claim 3, characterized in that, An activated carbon filter (511) is provided at the inlet end of the air pump (51).

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