Exhaust device and methanol rectification system

Abstract

The utility model discloses an exhaust device and a methanol rectification system. The exhaust device comprises a pressure tapping pipe, a pressure detection part, an exhaust pipe and an adsorption assembly, the first end of the pressure tapping pipe is provided with a first connecting piece used for being detachably connected with the pump outlet pipe, the pressure tapping pipe is provided with a first valve body, and the first valve body is used for cutting off or opening a channel between the pressure tapping pipe and the pump outlet pipe; the pressure detection part is arranged at the second end of the pressure tapping pipe and is used for detecting and displaying the pressure in the pressure tapping pipe; the exhaust pipe is connected between the first valve body and the pressure detection part, the exhaust pipe extends in the specified direction, and a second valve body is arranged on the exhaust pipe; the pressure detection part can guide the second valve body to adjust the exhaust rate of the exhaust pipe; the adsorption assembly is communicated with the exhaust pipe at an outlet of the exhaust pipe, and an adsorption piece is arranged in the adsorption assembly and used for adsorbing specified components in gas from the pressure tapping pipe; the adsorption assembly is provided with a plurality of exhaust ports, and the exhaust ports are smaller than the adsorption parts in size.

Description

Technical Field

[0001] This application relates to the field of petrochemical technology, and in particular to an exhaust device and a methanol distillation system. Background Technology

[0002] Power pumps are commonly used in power plants, power stations, steel smelting, petroleum, chemical, textile, and printing and dyeing industries. For example, in the methanol distillation process, non-condensable gases inside the pipelines and equipment need to be discharged before the distillation pump can start working to ensure the normal operation of the equipment.

[0003] Currently, the conventional method is to reserve an air outlet on the pipeline, which is then sealed with a plug. When air needs to be released, the plug is manually removed, and then reinstalled after the air is released.

[0004] However, repetitive disassembly and reassembly of the sealing plug is not only inefficient, but also reduces the sealing effect due to the repeated disassembly and reassembly, leading to leakage. It is very easy to carry flammable and toxic non-condensable gases into the air, causing environmental pollution. Utility Model Content

[0005] This application provides an exhaust device and a methanol distillation system to solve the problem that repetitive disassembly and assembly of the sealing plug is not only inefficient, but also reduces the sealing effect due to the repetitive disassembly and assembly, resulting in leakage and easily carrying flammable and toxic non-condensable gases into the air, causing environmental pollution.

[0006] To address the aforementioned technical problems, this application provides the following technical solutions:

[0007] The first aspect of this application provides an exhaust device, which includes:

[0008] A pressure tapping tube is provided at its first end with a first connector for detachably connecting to a pump outlet pipe. The pressure tapping tube is provided with a first valve body for cutting off or opening the channel between the pressure tapping tube and the pump outlet pipe.

[0009] A pressure detection unit is disposed at the second end of the pressure tapping tube and is used to detect and display the pressure inside the pressure tapping tube.

[0010] An exhaust pipe is provided, which is connected between the first valve body and the pressure detection unit. The exhaust pipe extends in a specified direction and is equipped with a second valve body. The pressure detection unit can guide the second valve body to adjust the exhaust rate of the exhaust pipe.

[0011] An adsorption assembly is provided, wherein the adsorption assembly is connected to the outlet of the exhaust pipe and the exhaust pipe is connected to the exhaust pipe. The adsorption assembly is provided with an adsorption element for adsorbing a specified component in the gas from the pressure tapping pipe. The adsorption assembly has a plurality of exhaust ports, the size of which is smaller than the size of the adsorption element.

[0012] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device further includes a third valve body;

[0013] The third valve body is disposed at an interval from the second valve body on the exhaust pipe.

[0014] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device, wherein the outlet of the exhaust pipe is vertically downward.

[0015] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device, wherein the exhaust pipe includes a first pipe body and a second pipe body;

[0016] The first tube is connected to the pressure tapping tube;

[0017] The second pipe is connected to the first pipe via a bend, and the end of the second pipe facing away from the first pipe is vertically downward.

[0018] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device, wherein the second pipe is non-linear in the vertical direction, and the second pipe is filled with the adsorption element.

[0019] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device, wherein the material density of the second pipe body is less than that of the first pipe body.

[0020] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device has the radial dimension of the adsorption component being larger than the radial dimension of the exhaust pipe.

[0021] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device, wherein the second valve body is normally open.

[0022] In some modified embodiments of the first aspect of this application, the aforementioned exhaust device is wherein the adsorption component is detachably connected to the exhaust pipe.

[0023] A second aspect of this application provides a methanol distillation system, comprising:

[0024] A distillation pump, wherein the outlet of the distillation pump is connected to a pump outlet pipe, and the pump outlet pipe is provided with a second connector communicating with the outside of the pipe;

[0025] In the aforementioned exhaust device, the first connector of the pressure tapping pipe of the exhaust device is detachably connected to the second connector.

[0026] Compared to existing technologies, the exhaust device provided in this application achieves a detachable connection between the entire exhaust device and the pump outlet pipe through a first connector. Subsequent disassembly at the first connector is unnecessary; only the first and second valve bodies need to be adjusted to achieve the discharge of non-condensable gases, thus improving exhaust efficiency. Simultaneously, the adsorption components effectively absorb toxic and harmful components in the non-condensable gases, preventing environmental pollution. This solves the problem that repetitive disassembly and reassembly for sealing is not only inefficient but also reduces the sealing effect due to repeated disassembly and reassembly, leading to leaks and easily carrying flammable and toxic non-condensable gases into the air, causing environmental pollution. Attached Figure Description

[0027] The above and other objects, features, and advantages of exemplary embodiments of this application will become readily understood by reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application are illustrated by way of example and not limitation, with the same or corresponding reference numerals denoteing the same or corresponding parts, wherein:

[0028] Figure 1 A schematic diagram of a first structural embodiment of the exhaust device provided in this embodiment is shown.

[0029] Figure 2 A schematic diagram of a second structure of the exhaust device provided in this embodiment is shown.

[0030] Figure 3 A schematic diagram of a third structure of the exhaust device provided in this embodiment is shown.

[0031] The reference numerals are as follows: 1. Pressure tapping pipe; 11. First connector; 2. Pressure detection unit; 3. Exhaust pipe; 31. First pipe body; 32. Second pipe body; 33. Bend; 4. Adsorption assembly; 5. First valve body; 6. Second valve body; 7. Third valve body. Detailed Implementation

[0032] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0033] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application shall be […].

[0034] Power pumps are commonly used in power plants, power stations, steel smelting, petroleum, chemical, textile, and printing and dyeing industries. For example, in the methanol distillation process, when the upstream methanol container reaches the pump start-up condition and the pump needs to be put into operation, the methanol pump is vented according to the operating procedures to release non-condensable gases from the pipeline and equipment to ensure the normal operation of the equipment. Specifically, an vent is reserved on the pipeline, and the vent is sealed with a plug. The plug is threaded to the pipeline. When venting is required, the plug is manually removed, and after venting is completed, the plug is reset.

[0035] However, the repetitive disassembly and reassembly of the sealing plug is not only inefficient, but also reduces the sealing effect due to the repeated disassembly and reassembly, leading to leakage. It is very easy to carry flammable and toxic non-condensable gases into the air, causing environmental pollution. In addition, the position of the gas outlet on the pipeline is not fixed and needs to be adjusted according to the surrounding space conditions. Furthermore, when venting, it is necessary to consider the wind direction, personnel position, and surrounding space limitations to find a suitable time to disassemble and vent the sealing plug, which is extremely inefficient.

[0036] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows:

[0037] Example 1

[0038] Reference Appendix Figure 1 The exhaust device provided in this embodiment includes a pressure tapping pipe 1, a pressure detection unit 2, an exhaust pipe 3, and an adsorption assembly 4. The first end of the pressure tapping pipe 1 is provided with a first connector 11 for detachably connecting to a pump outlet pipe (not shown in the figure). The pressure tapping pipe 1 is provided with a first valve body 5, which is used to cut off or open the channel between the pressure tapping pipe 1 and the pump outlet pipe. The pressure detection unit 2 is located at the second end of the pressure tapping pipe 1 and is used to detect and display the pressure inside the pressure tapping pipe 1. The exhaust pipe 3 is connected between the first valve body 5 and the pressure detection unit 2, and extends in a specified direction. The exhaust pipe 3 is provided with a second valve body 6. The pressure detection unit 2 can guide the second valve body 6 to adjust the exhaust rate of the exhaust pipe 3. The adsorption assembly 4 is connected to the exhaust pipe 3 at its outlet. The adsorption assembly 4 is provided with an adsorption element for adsorbing a specified component in the gas from the pressure tapping pipe 1. The adsorption assembly 4 has several exhaust ports (not shown in the figure), the size of which is smaller than the size of the adsorption element.

[0039] It is understandable that repeatedly disassembling and reassembling the sealing plug is not only inefficient, but also reduces the sealing effect due to repeated disassembly and reassembly, leading to leakage. This can easily carry flammable and toxic non-condensable gases into the air, causing environmental pollution. The exhaust device provided in this embodiment can be connected to the pump outlet pipe through the first connector 11. The first valve body and the second valve body are used to adjust whether to exhaust and the exhaust rate, so that non-condensable gases can be discharged without disassembly. This avoids the inefficiency caused by repeated disassembly and reassembly and the environmental pollution caused by the leakage of toxic and harmful substances.

[0040] The exhaust device provided in this embodiment can be used, but is not limited to, in the methanol distillation process, and can also be used on any pump outlet pipe that requires exhaust before pumping.

[0041] The pressure tapping pipe 1 is a rigid, corrosion-resistant, and high-temperature resistant pipe structure, which may be, but is not limited to, stainless steel. The shape and size of the pressure tapping pipe 1 are not limited here and can be designed and adjusted according to actual needs. The first connector 11 at the first end of the pressure tapping pipe 1 may be, but is not limited to, a flange, clamp, etc., as long as it can ensure that the pressure tapping pipe 1 corresponds to and connects with the opening on the pump outlet pipe. The first connector 11 completes the connection and separation between the entire exhaust device and the pump outlet pipe. In this embodiment, the first connector 11 and the pressure tapping pipe 1 can be integrated or separate, and can be designed and adjusted according to actual needs; no restrictions are imposed here.

[0042] The first valve body 5 is a switch valve that regulates the opening and closing of the passage between the pump outlet pipe and the pressure tapping pipe 1. The first valve body 5 can be, but is not limited to, a ball valve, a gate valve, a solenoid valve, a needle valve, etc. In this embodiment, the first valve body 5 can be set to a normally open state to ensure that the pressure detection unit 2 can detect the pressure in the pump outlet pipe in real time and accurately, preventing intermittent opening of the first valve body 5 from affecting the continuity and accuracy of the pressure detection unit 2. The first valve body 5 also improves the maintenance convenience of the pressure detection unit 2. When the pressure detection unit 2 needs to be disassembled, repaired, or replaced, it can be removed simply by closing the first valve body 5 without stopping the pump, thus maintaining the efficiency of the overall process.

[0043] The pressure detection unit 2 can detect and display the pressure inside the pipeline, and can be, but is not limited to, a pressure gauge, digital pressure gauge, etc. The pressure detection unit 2 is located at the second end of the pressure tapping pipe 1 and can be connected by a thread, facilitating maintenance and replacement of the pressure detection unit 2. The detection results of the pressure detection unit 2 can guide whether the second valve body 6 is open and even the degree of opening. When the detection results of the pressure detection unit 2 meet the production conditions, the second valve body 6 can be controlled to open for venting.

[0044] The exhaust pipe 3 is a rigid, corrosion-resistant, and high-temperature-resistant pipe structure, which can be, but is not limited to, stainless steel. The shape and size of the exhaust pipe 3 are not limited and can be designed and adjusted according to actual needs. The exhaust pipe 3 extends from between the first valve body 5 and the pressure detection unit 2 in a designated direction. This designated direction can be designed and adjusted according to actual needs to avoid other pipelines or equipment outside the pump outlet pipe and ensure that the outlet of the exhaust pipe 3 is far from the height of a person's face, for example, downwards, parallel to the pump outlet pipe, etc., thus improving the operational safety of the exhaust device.

[0045] The second valve body 6 is a regulating valve that can adjust whether the exhaust pipe 3 is venting and the venting rate. The second valve body 6 can be, but is not limited to, a shut-off valve, a solenoid valve, a needle valve, etc. In this embodiment, the opening and closing state of the second valve body 6 can be adjusted in real time as needed. When the reading of the pressure detection unit 2 meets the production conditions, the second valve body 6 can be opened to vent. For example, the second valve body 6 can be opened when the reading displayed by the pressure detection unit 2 is greater than or equal to the upper limit of the pump pressure. At the same time, the opening degree of the second valve body 6 can also be adjusted in real time to adjust the venting rate, and the detection result of the pressure detection unit 2 can directly guide the adjustment of the opening degree of the second valve body 6. This setting can be easily understood by those skilled in the art, and will not be elaborated further here.

[0046] The adsorption component 4 is located at the outlet end of the exhaust pipe 3. The adsorption component 4 is filled with adsorption elements, such as activated carbon, ceramic adsorbents, and iron oxide nanoparticles. When non-condensable gas in the pump outlet pipe enters the adsorption component 4 through the pressure tapping pipe 1 and the exhaust pipe 3, toxic and harmful components such as methanol contained within it are adsorbed by the adsorption elements, preventing them from being discharged and polluting the environment. The exhaust port of the adsorption component 4 can be a filter mesh or a design cut into the adsorption component 4. The shape of the exhaust port can be designed and adjusted according to actual needs. The size of the exhaust port should be smaller than the size of the adsorption elements to ensure that the adsorption elements do not leak out of the exhaust port and affect the adsorption effect. In this embodiment, the adsorption component 4 can be threadedly connected to the exhaust pipe 3, improving the convenience of subsequent adsorption element replacement.

[0047] As described above, the exhaust device provided in this application achieves a detachable connection between the overall exhaust device and the pump outlet pipe through the first connector 11. Subsequent disassembly of the first connector 11 is unnecessary; only the first valve body 5 and the second valve body 6 need to be adjusted to achieve the discharge of non-condensable gases, thus improving exhaust efficiency. Simultaneously, the adsorption component 4 effectively absorbs toxic and harmful components in the non-condensable gases, preventing environmental pollution. This solves the problem that repetitive disassembly and reassembly for sealing is not only inefficient but also reduces the sealing effect due to repeated disassembly and reassembly, leading to leakage and easily carrying flammable and toxic non-condensable gases into the air, causing environmental pollution.

[0048] Further, see Appendix Figure 2In this embodiment, the exhaust device further includes a third valve body 7; the third valve body 7 is disposed at an interval from the second valve body 6 on the exhaust pipe 3.

[0049] Understandably, in order to improve the operational flexibility of the exhaust device, a third valve body 7 is provided on the sampling tube 3 in this embodiment. The third valve body 7 and the second valve body 6 are arranged alternately. In this embodiment, the third valve body 7 can be set relatively close to the adsorption component 4, and the second valve body 6 can be set to the normally open state. The exhaust pipe 3 can be adjusted for exhaust and exhaust rate through the third valve body 7. With this setting, when maintaining the third valve body 7 and the adsorption component 4, the second valve body 6 can be closed to cut off the exhaust, without affecting the pressure tapping tube 1 and the pressure detection unit 2. It is also not necessary to disassemble the pressure detection unit 2 at the same time or adjust the opening and closing state of the first valve body 5, which greatly improves flexibility and convenience. In addition, the setting of the third valve body 7 can also play a sealing role. If either the first valve body 5 or the second valve body 6 leaks, the third valve body 7 can be closed to ensure a seal and prevent unnecessary exhaust. In this embodiment, the third valve body 7 can be a regulating valve, which can adjust whether the exhaust pipe 3 exhausts and the exhaust rate. The third valve body 7 can be, but is not limited to, a shut-off valve, a solenoid valve, etc. In this embodiment, the opening and closing state of the third valve body 7 can be adjusted in real time as needed. When the reading of the pressure detection unit 2 meets the production conditions, the third valve body 7 can be opened to exhaust. At the same time, the opening degree of the third valve body 7 can be adjusted in real time to adjust the exhaust rate. Moreover, the detection result of the pressure detection unit 2 can directly guide the adjustment of the opening degree of the third valve body 7. This setting can be easily understood by those skilled in the art, and will not be elaborated on here.

[0050] Further, see Appendix Figure 1 and attached Figure 2 In the specific implementation of the exhaust device provided in this embodiment, the outlet of the exhaust pipe 3 is vertically downward.

[0051] Understandably, to improve the safety of the exhaust device, this embodiment can set the outlet of the exhaust pipe 3 to be vertically downward, as close to the ground as possible. This ensures that even if splashing occurs during exhaust, it will not affect exposed parts of the operator's face or hands. Direction can be achieved through a bend in the pipe or by using a flexible metal hose. Simultaneously, this avoids the inconsistency and instability of the pump outlet pipe's opening orientation, preventing exhaust from being limited by wind direction, opening orientation, and operator position, thus improving exhaust efficiency while ensuring safety.

[0052] Further, see Appendix Figure 2 and attached Figure 3In the specific implementation of the exhaust device provided in this embodiment, the exhaust pipe 3 includes a first pipe body 31 and a second pipe body 32; the first pipe body 31 is connected to the pressure tapping pipe 1; the second pipe body 32 is connected to the first pipe body 31 through a bend 33, and the end of the second pipe body 32 facing away from the first pipe body 31 is vertically downward.

[0053] Understandably, in order to ensure the exhaust pipe 3 outlet faces downwards, in this embodiment, the exhaust pipe 3 is configured to include a first pipe body 31 and a second pipe body 32. The extension direction of the first pipe body 31 is not limited; it can be horizontal, inclined, vertical, etc., as long as it can cooperate with the pressure tapping pipe 1. The second pipe body 32 can be turned by bends 33 so that the outlet of the second pipe body 32 faces downwards. Of course, the extension direction of the second pipe body 32 can be vertical or inclined, as long as the outlet faces downwards. It is easy to understand that the number of bends 33 can be designed and adjusted according to actual needs to achieve the turning of the second pipe body 32. In this embodiment, the lengths of the first pipe body 31 and the second pipe body 32 can be designed and adjusted according to actual needs. The shapes of the first pipe body 31 and the second pipe body 32 are not limited here and can be designed and adjusted according to actual needs. For example, they can be straight pipes, bends, or irregularly shaped pipes, as long as they can cooperate with the spatial layout around the pump outlet pipe. In this embodiment, the first tube 31, the pressure tapping tube 1, the second tube 32, and the bend 33 are all detachable screw connections, thereby improving the convenience of subsequent maintenance.

[0054] Further, see Appendix Figure 3 In the exhaust device provided in this embodiment, the second pipe 32 is non-linear in the vertical direction, and the adsorption element is filled inside the second pipe 32.

[0055] It is understandable that, in order to improve the adsorption effect, in this embodiment, the second tube 32 can be configured to be in a straight line along the vertical direction, and an adsorption element can be filled inside the second tube 32; the second tube 23 can be Figure 3 The shape shown can be wavy, arc-shaped, multi-segmented, multi-coiled, or irregular, to increase the contact time between the gas and the adsorption element by extending the exhaust path and thus improving the adsorption effect. In this configuration, the gas discharged from the pump outlet pipe can undergo primary adsorption in the second tube 32 and secondary adsorption in the adsorption assembly 4, greatly improving the adsorption and filtration effect. The filling amount of the adsorption element in the second tube 32 can be designed and adjusted according to actual needs, which will not be elaborated further here.

[0056] Furthermore, in the exhaust device provided in this embodiment, the material density of the second pipe body 32 is less than that of the first pipe body 31.

[0057] Understandably, in order to extend the overall service life of the exhaust device, the material of the second pipe 32 in this embodiment can be selected as a lightweight material to reduce the force it exerts on the bend 33 and improve its ease of disassembly and assembly during maintenance. In this embodiment, the second pipe 32 can be, but is not limited to, a flexible metal hose, which is not only lightweight but also allows for free path changes according to space constraints.

[0058] Further, see Appendix Figure 1 and attached Figure 2 In the exhaust device provided in this embodiment, in a specific implementation, the radial dimension of the adsorption component 4 is larger than the radial dimension of the exhaust pipe 3.

[0059] Understandably, to improve the adsorption effect, in this embodiment, the radial dimension of the adsorption component 4 can be larger than the radial dimension of the exhaust pipe 3. This allows the gas discharged from the pump outlet pipe to enter the adsorption component 4 and not be directly discharged, but rather buffered within the adsorption component 4, ensuring sufficient contact with the adsorbent and achieving efficient adsorption filtration. In this embodiment, the adsorption component 4 may include, but is not limited to, a housing with a receiving space connected to the exhaust pipe 3. A filter screen is provided at its bottom to form an exhaust port. The shape of the housing is not limited; it can be spherical, rectangular, etc. Furthermore, in this embodiment, the connection between the exhaust pipe 3 and the housing can be screwed together for easy replacement of the adsorbent.

[0060] Understandably, the replacement of the adsorption component can be determined based on the content of methanol or a specified component in the gas discharged from the adsorption component. For example, the exhaust port of the adsorption component can be tested by a leak detector to determine whether the discharged gas contains methanol or a specified component. If the amount of methanol or a specified component exceeds the relevant specifications, it indicates that the adsorption component is saturated and has no adsorption capacity. In this case, the adsorption component 4 can be removed from the exhaust pipe 3 for replacement.

[0061] Example 2

[0062] This embodiment provides a methanol distillation system, which includes a distillation pump (not shown in the figure) and the exhaust device. The outlet of the distillation pump is connected to a pump outlet pipe, and the pump outlet pipe is provided with a second connector communicating with the outside of the pipe. The first connector 11 of the pressure tapping pipe 1 of the exhaust device is detachably connected to the second connector.

[0063] It is understood that the exhaust device is the same as the exhaust device described in Embodiment 1. Its structure and working principle are described in detail in Embodiment 1 and will not be repeated here.

[0064] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An exhaust device, characterized in that, It includes: A pressure tapping tube is provided at its first end with a first connector for detachably connecting to a pump outlet pipe. The pressure tapping tube is provided with a first valve body for cutting off or opening the channel between the pressure tapping tube and the pump outlet pipe. A pressure detection unit is disposed at the second end of the pressure tapping tube and is used to detect and display the pressure inside the pressure tapping tube. An exhaust pipe is provided, which is connected between the first valve body and the pressure detection unit. The exhaust pipe extends in a specified direction and is equipped with a second valve body. The pressure detection unit can guide the second valve body to adjust the exhaust rate of the exhaust pipe. An adsorption assembly is provided, wherein the adsorption assembly is connected to the outlet of the exhaust pipe and the exhaust pipe is connected to the exhaust pipe. The adsorption assembly is provided with an adsorption element for adsorbing a specified component in the gas from the pressure tapping pipe. The adsorption assembly has a plurality of exhaust ports, the size of which is smaller than the size of the adsorption element.

2. The exhaust device according to claim 1, characterized in that: It also includes a third valve body; The third valve body is disposed at an interval from the second valve body on the exhaust pipe.

3. The exhaust device according to claim 1, characterized in that: The outlet of the exhaust pipe is vertically downward.

4. The exhaust device according to claim 3, characterized in that: The exhaust pipe includes a first pipe body and a second pipe body; The first tube is connected to the pressure tapping tube; The second pipe is connected to the first pipe via a bend, and the end of the second pipe facing away from the first pipe is vertically downward.

5. The exhaust device according to claim 4, characterized in that: The second tube is non-linear in the vertical direction, and the adsorption element is filled inside the second tube.

6. The exhaust device according to claim 5, characterized in that: The material density of the second tube is less than that of the first tube.

7. The exhaust device according to claim 1, characterized in that: The radial dimension of the adsorption component is larger than the radial dimension of the exhaust pipe.

8. The exhaust device according to claim 2, characterized in that: The second valve body is normally open.

9. The exhaust device according to claim 1, characterized in that: The adsorption component is detachably connected to the exhaust pipe.

10. A methanol distillation system, characterized in that, It includes: A distillation pump, wherein the outlet of the distillation pump is connected to a pump outlet pipe, and the pump outlet pipe is provided with a second connector communicating with the outside of the pipe; The exhaust device according to any one of claims 1-9, wherein the first connector of the pressure tapping pipe of the exhaust device is detachably connected to the second connector.

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