A silencer for venting gas from air separation equipment

Abstract

A silencer for venting gas from an air separation device belongs to the technical field of silencer devices and comprises an outer shell that plays a protective role, an air inlet pipe that is arranged inside the outer shell and passes through the outer shell at one end, an exhaust pipe that is arranged inside the outer shell and passes through the outer shell at one end, a main pipeline that is arranged inside the outer shell, a pressure relief chamber that is arranged inside the outer shell, at least one shunt pipeline that is arranged inside the outer shell, a pressure relief mechanism that is arranged inside the pressure relief chamber, and a control end for controlling the entire silencer; the air inlet pipe, the main pipeline, the pressure relief chamber and the exhaust pipe are connected in sequence, the pressure relief mechanism is arranged inside the exhaust pipe and is located at one end close to the pressure relief chamber; the pressure relief mechanism is used to control the exhaust pipe to be connected or disconnected; the present invention reduces the flow velocity and pressure of the gas by arranging the pressure relief chamber, the shunt pipeline and the exhaust pipe, relieves the pressure of the vented gas and weakens the sound wave energy, thereby reducing the generation of noise to achieve a higher level of silencer effect.

Description

Technical Field

[0001] The invention relates to the technical field of silencers, and in particular to a silencer for venting gas from an air separation plant. Background Art

[0002] Air separation equipment uses air as raw material, converts air into liquid through compression cycle deep freezing, and then gradually separates and produces inert gases such as oxygen, nitrogen and argon from liquid air through distillation. During the operation of air separation equipment, gas venting is a common operation link, but this process is often accompanied by noise. The silencer for gas venting of air separation equipment is designed to solve this problem.

[0003] When the air separation equipment is venting gas, high-intensity noise will be generated due to the high-speed flow of gas and the sudden release of pressure. This noise will not only affect the physical and mental health of operators, but also may cause noise pollution to the surrounding environment. Therefore, it is particularly important to develop an effective silencer to reduce the noise level when the air separation equipment is venting gas.

[0004] In the existing technology, the control of gas venting noise of air separation equipment mainly relies on some traditional noise reduction methods, such as sound barriers, soundproof walls, etc. However, these methods often have the following shortcomings in practical applications:

[0005] Poor noise reduction effect: Although traditional sound barriers and soundproof walls can reduce the spread of noise to a certain extent, their noise reduction effect is limited for high-intensity noise sources such as gas venting in air separation equipment.

[0006] Limited applicability: Different air separation equipment has different noise characteristics and venting conditions. Traditional noise reduction methods are often difficult to adapt to all situations, resulting in unstable noise reduction effects.

[0007] Therefore, a silencer device that can be connected to the air separation plant is needed. Summary of the invention

[0008] In view of the above problems, the present invention proposes a silencing device for venting gas from an air separation plant, and the technical solution used is:

[0009] A silencer for venting gas from an air separation plant, comprising an outer shell for protection, an air inlet pipe arranged inside the outer shell and having one end passing through the outer shell, an exhaust pipe arranged inside the outer shell and having one end passing through the outer shell, a main pipeline arranged inside the outer shell, a pressure relief chamber arranged inside the outer shell, at least one shunt pipeline arranged inside the outer shell, a pressure relief mechanism arranged inside the pressure relief chamber, and a control end for controlling the entire silencer;

[0010] The air intake pipe, the main pipe, the pressure relief chamber and the exhaust pipe are connected in sequence, and the pressure relief mechanism is arranged inside the exhaust pipe and located at one end close to the pressure relief chamber; the pressure relief mechanism is used to control the exhaust pipe to be connected or disconnected;

[0011] One end of the shunt pipeline is connected to the pressure relief chamber, and the other end is connected to the exhaust pipe; the shunt pipeline is used to circulate air and silence the circulated air.

[0012] Furthermore, there are two groups of pressure relief mechanisms, which are symmetrically placed. The exhaust pipe is disconnected by moving the two groups of pressure relief mechanisms toward each other so that the two groups of pressure relief mechanisms are in contact; or the exhaust pipe is connected by moving the two groups of pressure relief mechanisms away from each other so that the two groups of pressure relief mechanisms are separated.

[0013] Further, the pressure relief mechanism includes a first electric cylinder fixedly mounted on the outer wall of the shunt pipeline, a pressure relief bottom plate arranged at the end of the piston rod of the first electric cylinder, and a sealing plate arranged on the pressure relief bottom plate;

[0014] The piston rod of the first electric cylinder passes through the exhaust pipe and is fixedly connected to a pressure relief bottom plate slidably installed inside the exhaust pipe; the sealing plate is perpendicular to the pressure relief bottom plate, and the sealing plate is slidably installed in the exhaust pipe for cutting off the exhaust pipe.

[0015] Furthermore, the silencer device also includes a main exhaust pipeline arranged inside the outer shell, one end of the main exhaust pipeline is connected to the outlet of the branch pipeline, and the other end is connected to the exhaust pipe.

[0016] Further, the main exhaust pipeline includes a plurality of angle adjustment plates arranged inside the main exhaust pipeline and an outlet section arranged at an outlet end of the main exhaust pipeline;

[0017] A plurality of the angle adjustment plates are rotatably installed in the main exhaust pipeline, and an iron bar is arranged at the outer end of the angle adjustment plate; the outlet section is connected with the main exhaust pipeline and the exhaust pipe.

[0018] Furthermore, the silencing device further comprises a first driving mechanism arranged on the outer wall of the diversion pipeline.

[0019] The first driving mechanism comprises a second electric cylinder arranged on the outer wall of the shunt pipeline, a connecting rod arranged on the end of the piston rod of the second electric cylinder, and a magnet arranged on the connecting rod;

[0020] The connecting rod is slidably mounted on the outside of the main exhaust pipeline, and the magnet on the connecting rod corresponds to the iron bar on the angle adjustment plate.

[0021] Furthermore, the silencing device further comprises a diffusion pipeline arranged inside the outer shell;

[0022] One end of the diffusion pipeline is communicated with the middle side wall of the diversion pipeline, and the other end is communicated with the exhaust pipe.

[0023] Furthermore, the silencing device also includes a second driving mechanism arranged on the outer wall of the diversion pipeline, and the second driving mechanism is used to close the diffusion pipeline or control the size of the opening.

[0024] Further, the second driving mechanism includes a third electric cylinder arranged on the outer wall of the shunt pipeline, a T-shaped connecting plate arranged on the piston rod of the third electric cylinder, and a plurality of L-shaped baffles arranged on the T-shaped connecting plate;

[0025] The T-shaped connecting plate passes through the outer wall of the shunt pipeline; the first plate of the L-shaped baffle is slidably installed inside the shunt pipeline and fits with the inner wall of the shunt pipeline for sealing, and the second plate of the L-shaped baffle is slidably installed in the regulating chamber of the diffusion pipeline.

[0026] Furthermore, a plurality of silencer plates are arranged in the exhaust pipe, and the silencer plates are located near the exhaust pipe outlet.

[0027] Since the present invention adopts the above technical solution, the present invention has the following advantages:

[0028] 1. The present invention reduces the flow velocity and pressure of the gas by arranging an air intake pipe, a main pipe, a pressure relief chamber, a shunt pipe and an exhaust pipe, relieves the pressure of the vented gas and weakens the sound wave energy, thereby reducing the generation of noise to achieve a higher level of silencing effect.

[0029] 2. A diffusion hole is provided in the diversion pipeline of the present invention, and the diffusion hole can absorb a part of the diverted gas and discharge it through the diffusion pipeline to further disperse the gas. Moreover, the size of the diffusion hole of this diffusion mechanism can be adjusted to adapt to different degrees of silencing of the vented gas, thereby achieving the best silencing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a front view of the overall structure of the present invention.

[0031] Figure 2 It is a three-dimensional structural schematic diagram of the overall structure of the present invention.

[0032] Figure 3 It is a front view of the local structure of the present invention.

[0033] Figure 4 It is a three-dimensional schematic diagram of the local structure of the present invention.

[0034] Figure 5 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point A in the middle.

[0035] Figure 6 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point B in the middle.

[0036] Figure 7 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point C in the middle.

[0037] Figure 8 For the present invention Figure 4 Schematic diagram of the local enlarged structure at point D in the middle.

[0038] Fig. 9 It is a schematic diagram of the assembly structure of the pressure relief chamber, the diversion pipeline and the main exhaust pipeline of the present invention.

[0039] Fig.10 For the present invention Fig. 9 Schematic diagram of the local enlarged structure at point E in the middle.

[0040] Fig.11 It is a structural schematic diagram of the pressure relief mechanism of the present invention.

[0041] Fig.12 It is a structural schematic diagram of the first driving mechanism of the present invention.

[0042] Fig.13 It is a schematic structural diagram of the second driving mechanism of the present invention.

[0043] Fig.14 It is a connection diagram of the control terminal of the present invention.

[0044] Figure Number:

[0045] 10. Outer shell;

[0046] 11. Intake pipe;

[0047] 12. Exhaust pipe;

[0048] 13. Main pipeline;

[0049] 14. Pressure relief chamber;

[0050] 15. Diversion pipeline; 151. Diffusion hole;

[0051] 16. Main exhaust pipeline; 161. Exit section; 162. Angle adjustment plate;

[0052] 17. Diffusion pipeline; 171. Adjustment chamber;

[0053] 18. pressure relief mechanism; 181. pressure relief bottom plate; 182. first electric cylinder; 183. sealing plate;

[0054] 19. first driving mechanism; 191. second electric cylinder; 192. connecting rod; 193. magnet;

[0055] 20. Second driving mechanism; 201. Third electric cylinder; 202. T-shaped connecting plate; 203. L-shaped baffle;

[0056] 21. Silencer. DETAILED DESCRIPTION

[0057] The technical solution of the present invention is further specifically described below by way of embodiments and in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0058] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "up", "down", "in", "out", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0059] Example:

[0060] like Figure 1 and Figure 2 As shown, Figure 1 It is a front view of the overall structure of the present invention. Figure 2 is a three-dimensional structural schematic diagram of the overall structure of the present invention; Figure 1 and Figure 2 , a silencer for gas venting of an air separation plant, comprising an outer shell 10 for protection and support, an air inlet pipe 11 arranged inside the outer shell 10, one end of the air inlet pipe 11 passes through the outer shell 10 and is connected to the exhaust port of the gas venting of the air separation plant, and the other end is connected to the main pipeline 13; the main pipeline 13 is arranged inside the outer shell 10 (please refer to Figure 3 or Figure 4 ), the other end of the main pipe 13 is connected to the small opening of the pressure relief chamber 14; the pressure relief chamber 14 is trumpet-shaped, the small opening of the pressure relief chamber 14 is connected to the main pipe 13, and the large opening of the pressure relief chamber 14 is connected to the exhaust pipe 12; the exhaust pipe 12 is arranged inside the outer shell 10, and the other end passes through the outer shell 10 to communicate with the outside to discharge air; two shunt pipes 15 are arranged inside the outer shell 10, one end of the two shunt pipes 15 are respectively connected to the two sides of the pressure relief chamber 14, and the other end of the two shunt pipes 15 are respectively connected to the two sides of the exhaust pipe 12; the shunt pipe 15 is used to circulate air and silence the circulated air. Another optional way is to have a shunt pipe 15, that is, only if Figure 3The shunt line 15 on the left or the shunt line 15 on the right is shown.

[0061] Specifically, the air intake pipe 11, the main pipe 13, the pressure relief chamber 14 and the exhaust pipe 12 are connected in sequence for circulating air, and the control end for controlling the entire silencer is arranged inside the outer shell 10; the present invention reduces the flow velocity and pressure of the gas by arranging the air intake pipe 11, the main pipe 13, the pressure relief chamber 14, the diversion pipe 15 and the exhaust pipe 12, relieves the pressure of the vented gas and weakens the sound wave energy, thereby reducing the generation of noise to achieve a higher level of silencer effect.

[0062] Furthermore, the pressure relief mechanism 18 is arranged inside the exhaust pipe 12 and is located at one end close to the pressure relief chamber 14; the pressure relief chamber 14 is used to control the exhaust pipe 12 to be connected or disconnected; specifically, when the air needs to be released quickly (that is, when the pressure in the main pipeline 13 is too high), the pressure relief mechanism 18 is opened to connect the exhaust pipe 12 with the pressure relief chamber 14, and then the gas is quickly vented. When the noise of gas venting needs to be eliminated, the pressure relief chamber 14 and the exhaust pipe 12 are isolated by the pressure relief mechanism 18, and the gas is allowed to pass through the diversion pipeline 15 to further eliminate the noise.

[0063] Another optional implementation method, refer to Figure 3 There are two groups of pressure relief mechanisms 18, which are symmetrically placed. The exhaust pipe 12 is disconnected by moving the two groups of pressure relief mechanisms 18 toward each other so that the two groups of pressure relief mechanisms 18 are in contact with each other; or the exhaust pipe 12 is connected by moving the two groups of pressure relief mechanisms 18 away from each other so that the two groups of pressure relief mechanisms 18 are separated.

[0064] Specifically, the pressure relief mechanism 18 includes a first electric cylinder 182, the cylinder body of the first electric cylinder 182 is fixedly mounted on the outer wall of the shunt pipeline 15, and the piston rod of the first electric cylinder 182 passes through the exhaust pipe 12 and is fixedly connected to a pressure relief bottom plate 181 slidably mounted inside the exhaust pipe 12; the pressure relief bottom plate 181 is a Z-shaped plate (such as Fig.11 As shown in FIG. 1 ), the sealing plate 183 is fixedly connected to the pressure relief bottom plate 181, and the sealing plate 183 is slidably installed in the exhaust pipe 12 for cutting off the exhaust pipe 12; the pressure relief bottom plates 181 of the two groups of pressure relief mechanisms 18 are cut off after contact (as shown in FIG. 1 ). Figure 3 As shown); the pressure relief bottom plates 181 of the two groups of pressure relief mechanisms 18 are separated and then connected to the exhaust pipe 12.

[0065] refer to Figure 3 and Figure 6 The silencer device further includes a main exhaust pipeline 16 , which is disposed inside the outer shell 10 . One end of the main exhaust pipeline 16 is connected to the outlet of the diversion pipeline 15 , and the other end is connected to the exhaust pipe 12 .

[0066] Specifically, each flow dividing pipeline 15 is provided with two outlets (such as Fig. 9 As shown in FIG. 1 ), the two outlets are respectively connected to the two main exhaust pipes 16, and the outlets of the two main exhaust pipes 16 are commonly connected to an outlet section 161, and the outlet section 161 is connected to the exhaust pipe 12; a plurality of angle adjustment plates 162 are arranged on the main exhaust pipe 16, and the plurality of angle adjustment plates 162 are arranged in two rows and crosswise in sequence, and the plurality of angle adjustment plates 162 are rotatably installed in the main exhaust pipe 16 (as shown in FIG. 1 ). Figure 7 As shown), and an iron bar is provided at the outer end of the angle adjustment plate 162; the muffler device also includes a first drive mechanism 19, the first drive mechanism 19 is provided on the outer wall of the shunt pipe 15 (please refer to Fig.12 ), the first driving mechanism 19 includes a second electric cylinder 191, the cylinder body of the second electric cylinder 191 is arranged on the outer wall of the shunt pipeline 15; a connecting rod 192 is fixedly installed at the end of the piston rod of the second electric cylinder 191, and a plurality of magnets 193 are arranged on the connecting rod 192 at equal intervals; the connecting rod 192 is slidably installed on the outer side of the main exhaust pipeline 16, and the magnets 193 on the connecting rod 192 correspond to the iron bars on the angle adjustment plate 162 in sequence. The second electric cylinder 191 is extended and retracted to drive the connecting rod 192 and then drive the magnet 193 to move, and the movement of the magnet 193 drives the angle adjustment plate 162 to rotate, thereby achieving the angle adjustment, thereby achieving the effect of adjusting the silencer and the angle and speed of air circulation.

[0067] The silencer also includes a diffusion line 17 (see Figure 6 ), the diffusion pipeline 17 is arranged inside the outer shell 10; one end of the diffusion pipeline 17 is connected to the middle side wall of the shunt pipeline 15, and the other end is connected to the exhaust pipe 12. A regulating chamber 171 is arranged at the inlet end of the diffusion pipeline 17, and the regulating chamber 171 is connected to the shunt pipeline 15 through the diffusion hole 151 of the shunt pipeline 15 (please refer to Fig.10 Specifically, the plurality of diffusion pipes 17 are divided into two rows and are equidistantly installed on the outside of the shunt pipe 15; the silencer further includes a second drive mechanism 20, which is arranged on the outer wall of the shunt pipe 15 (please refer to Figure 5 ), the second driving mechanism 20 is used to close the diffusion pipe 17 or control the size of the opening, thereby controlling the air circulation and air silencing.

[0068] Specifically, refer to Fig.13The second driving mechanism 20 includes a third electric cylinder 201, which is arranged on the outer wall of the shunt pipeline 15. A T-shaped connecting plate 202 and a plurality of L-shaped baffles 203 are arranged on the piston rod of the third electric cylinder 201; the T-shaped connecting plate 202 passes through the outer wall of the shunt pipeline 15; the first plate of the L-shaped baffle 203 is slidably installed inside the shunt pipeline 15, and is sealed with the inner wall of the shunt pipeline 15 to prevent air leakage, and the second plate of the L-shaped baffle 203 is slidably installed in the regulating chamber 171 of the diffusion pipeline 17; the third electric cylinder 201 works to push the T-shaped connecting plate 202 to move and push the L-shaped baffle 203 to move in the regulating chamber 171, thereby controlling the size of the connecting cross-section of the regulating chamber 171 and the shunt pipeline 15, thereby controlling the amount of airflow flowing into the diffusion pipeline 17.

[0069] Furthermore, a plurality of silencer plates 21 are provided in the exhaust pipe 12 (see Figure 3 or Figure 4 ), the muffler plate 21 is located near the outlet of the exhaust pipe 12. A plurality of muffler plates 21 are divided into two rows, which are arranged crosswise and equidistantly to improve the muffler effect.

[0070] This embodiment also includes a control terminal, such as Fig.14 As shown, the control end includes a main controller, a human-machine interactive display screen, an information transmission module, a storage module and a power module, and the main controller is electrically connected to the human-machine interactive display screen, the information transmission module, the storage module, the power module, and the first electric cylinder 182, the second electric cylinder 191 and the third electric cylinder 201; the main controller is used to control the operation of the entire silencing device; the human-machine interactive display screen is used to set the operating values ​​of the pressure relief mechanism 18, the angle adjustment plate 162 and the diffusion pipeline 17, as well as automatic operation control after determining the set values; the information transmission module is used for information transmission between the main controller and the pressure relief mechanism 18, the angle adjustment plate 162 and the diffusion pipeline 17; the power module is used to provide a stable power supply for the control end; the storage module is used to store the operating information data of the entire silencing device.

[0071] Working principle: When the present invention is used, firstly, the inlet of the air intake pipe 11 is installed on the exhaust port of the gas venting of the air separation equipment, and the venting gas will enter the main pipeline 13 through the air intake pipe, and then pass through the pressure relief chamber 14, and the rapid high-pressure gas will be depressurized, thereby reducing the flow speed and pressure of the gas, thereby reducing the generation of noise;

[0072] Subsequently, the gas is diverted to the diverter pipes 15 on the left and right sides, and the winding laying of the diverter pipes 15 increases the flow space of the gas, which can continuously weaken the transmission of sound, and a diffusion hole 151 is provided in the diverter pipe 15. The diffusion hole 151 can absorb a part of the diverted gas and discharge it through the diffusion pipe 17 to further disperse the gas, and the size of the inlet of the diffusion pipe 17 (i.e., the regulating chamber 171) can be adjusted to adapt to different degrees of silencing of the vented gas, so as to achieve the best silencing effect. When the pressure of the vented gas is relatively high, the flow cross-section of the diffusion hole 151 can be appropriately enlarged to increase the dispersion amount. Specifically, the third electric cylinder 201 drives the T-shaped connecting plate 202 to slide, and the T-shaped connecting plate 202 drives the L-shaped baffle 203 to slide, thereby increasing the flow volume of the regulating chamber 171.

[0073] When the gas in the bypass pipeline 15 flows through the main exhaust pipeline 16, the multi-layer angle adjustment plate 162 in the main exhaust pipeline 16 can block and slow down the flow speed of the gas, thereby further reducing the generation of noise, and the inclination of the angle adjustment plate 162 can also be adjusted according to the pressure of the exhaust gas, thereby changing the flow rate. Specifically, the second electric cylinder 191 drives the connecting rod 192 to slide, and a small round magnet 193 is inlaid on the connecting rod 192. The magnet 193 on the connecting rod 192 attracts the iron bar in the slide groove of the angle adjustment plate 162, thereby driving the angle of the angle adjustment plate 162 to rotate, thereby achieving the adjustment effect.

[0074] The angle adjustment plate 162 is also used selectively according to the strength of the vented gas. When the vented gas pressure is too strong, the load of the main line will increase. In order to achieve the best silencing effect of the main line, the pressure relief mechanism 18 will be activated to reduce the load of the main line 11. Specifically, the sealing plate 183 is driven by the first electric cylinder 182 to both sides, thereby opening a small gap in the middle, so that part of the gas in the pressure relief chamber 14 can directly enter the exhaust pipe 12 through the gap. A multi-layer cross-silencer plate 21 is provided in the exhaust pipe 12. Sound-absorbing cotton is attached to the silencer plate 21 to absorb the sound wave energy of the gas and finally discharge it. The pressure relief mechanism 18 is used in auxiliary emergency situations.

Claims

1. A silencer for venting gas from an air separation plant, characterized in that: The device comprises an outer shell for protection, an air inlet pipe arranged inside the outer shell and passing through the outer shell at one end, an exhaust pipe arranged inside the outer shell and passing through the outer shell at one end, a main pipe arranged inside the outer shell, a pressure relief chamber arranged inside the outer shell, at least one shunt pipe arranged inside the outer shell, a pressure relief mechanism arranged inside the pressure relief chamber, and a control end for controlling the entire silencer; the air inlet pipe, the main pipe, the pressure relief chamber and the exhaust pipe are connected in sequence, the pressure relief mechanism is arranged inside the exhaust pipe and is located at one end close to the pressure relief chamber; the pressure relief mechanism is used to control the exhaust pipe to be connected or disconnected; one end of the shunt pipe is connected to the pressure relief chamber, and the other end is connected to the exhaust pipe; the shunt pipe is used to circulate air and silence the circulated air; The muffler device also includes a diffusion pipeline arranged inside the outer shell; one end of the diffusion pipeline is connected to the middle side wall of the diversion pipeline, and the other end is connected to the exhaust pipe; The muffler device further comprises a second driving mechanism disposed on the outer wall of the diversion pipeline, the second driving mechanism being used to close the diffusion pipeline or control the amount of airflow flowing into the diffusion pipeline; The second driving mechanism includes a third electric cylinder arranged on the outer wall of the shunt pipeline, a T-shaped connecting plate arranged on the piston rod of the third electric cylinder, and a plurality of L-shaped baffles arranged on the T-shaped connecting plate; the T-shaped connecting plate passes through the outer wall of the shunt pipeline; the first plate of the L-shaped baffle is slidably installed inside the shunt pipeline and is sealed with the inner wall of the shunt pipeline, and the second plate of the L-shaped baffle is slidably installed in the regulating chamber of the diffusion pipeline.

2. A silencing device for venting gas from an air separation plant according to claim 1, characterized in that: There are two groups of pressure relief mechanisms, which are symmetrically placed. The exhaust pipe is disconnected by moving the two groups of pressure relief mechanisms toward each other so that the two groups of pressure relief mechanisms are in contact; or the exhaust pipe is connected by moving the two groups of pressure relief mechanisms away from each other so that the two groups of pressure relief mechanisms are separated.

3. A silencing device for venting gas from an air separation plant according to claim 1 or 2, characterized in that: The pressure relief mechanism includes a first electric cylinder fixedly installed on the outer wall of the shunt pipeline, a pressure relief bottom plate arranged at the end of the piston rod of the first electric cylinder, and a sealing plate arranged on the pressure relief bottom plate; the first electric cylinder piston rod passes through the exhaust pipe and is fixedly connected with the pressure relief bottom plate slidably installed inside the exhaust pipe; the sealing plate is perpendicular to the pressure relief bottom plate, and the sealing plate is slidably installed in the exhaust pipe for cutting off the exhaust pipe.

4. A silencing device for venting gas from an air separation plant according to claim 1, characterized in that: The muffler device also includes a main exhaust pipeline arranged inside the outer shell, one end of the main exhaust pipeline is connected to the outlet of the diversion pipeline, and the other end of the main exhaust pipeline is connected to the exhaust pipe.

5. A silencing device for venting gas from an air separation plant according to claim 4, characterized in that: The main exhaust pipeline includes a plurality of angle adjustment plates arranged inside the main exhaust pipeline and an outlet section arranged at the outlet end of the main exhaust pipeline; the plurality of angle adjustment plates are rotatably installed in the main exhaust pipeline, and an iron bar is arranged at the outer end of the angle adjustment plate; the outlet section connects the main exhaust pipeline and the exhaust pipe.

6. A silencer for venting gas from an air separation plant according to claim 5, characterized in that: The silencer device also includes a first driving mechanism arranged on the outer wall of the shunt pipe, the first driving mechanism includes a second electric cylinder arranged on the outer wall of the shunt pipe, a connecting rod arranged at the end of the piston rod of the second electric cylinder, and a magnet arranged on the connecting rod; the connecting rod is slidably installed on the outside of the main exhaust pipe, and the magnet on the connecting rod corresponds to the iron bar on the angle adjustment plate.

7. The silencing device for venting gas from an air separation plant according to claim 1, characterized in that: A plurality of silencer plates are arranged in the exhaust pipe, and the silencer plates are located near the outlet of the exhaust pipe.

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