Noise reduction structure at tail end of CO2 tail gas emission pipeline

Abstract

The utility model relates to the technical field of coal chemical industry, in particular to a tail end noise reduction structure of a CO2 tail gas discharge pipeline, which comprises a CO2 tail gas discharge chimney, a spiral flow guide noise reduction component is fixedly connected to the upper end of a CO2 tail gas discharge pipeline, and the CO2 tail gas discharge pipeline is fixedly connected to the upper end of the spiral flow guide noise reduction component. The upper portion of the outer surface of the CO2 tail gas emission pipeline is fixedly sleeved with a sound insulation assembly, and the upper end of the CO2 tail gas emission pipeline is fixedly connected with a noise reduction assembly. According to the tail end noise reduction structure of the CO2 tail gas emission pipeline, the inner glass fiber cotton on the sound insulation assembly is loose and porous in texture and can effectively absorb noise and convert the noise into heat energy to be consumed, the rubber damping fin can absorb part of the noise and can restrain vibration of the pipeline, noise generated by vibration is reduced, and the noise reduction effect is good. The outer glass fiber cotton further absorbs residual noise, and the polyurethane flame-retardant waterproof coiled material not only has waterproof and flame-retardant effects, but also can assist in sound insulation.

Description

Technical Field

[0001] This utility model relates to the field of coal chemical technology, and in particular to a noise reduction structure at the end of a CO2 tail gas emission pipeline. Background Technology

[0002] In the 600,000-ton coal-to-methanol process, 600,000 Nm³ of methanol is produced by the incomplete combustion reaction of coal-water slurry gasification. 3 / h of water gas reacts into shift gas under the action of a cobalt-molybdenum catalyst. The shift gas carries 20% to 30% carbon dioxide and trace amounts of sulfides, etc., and enters the Linde low-temperature methanol scrubber for desulfurization and decarbonization treatment. The purified syngas goes to the synthesis unit to produce methanol. The methanol rich in dissolved CO2 enters the hydrogen sulfide concentration tower, where it is almost completely released under the action of low-pressure nitrogen gas. The CO2 tail gas passes through a plate scrubbing tower and is washed in countercurrent contact with demineralized water. The small amount of methanol carried in the CO2 tail gas is dissolved in the demineralized water for recycling. The CO2 tail gas after being washed by demineralized water is discharged into the atmosphere through the CO2 tail gas chimney. When the CO2 tail gas passes through the emission pipeline, the flow of CO2 tail gas and the friction, collision, and vibration of the emission pipe wall generate high-frequency, high-decibel noise, causing noise pollution of the production unit, seriously affecting the physical and mental health of on-site workers, and also greatly affecting people's rest, study and life. Therefore, we have introduced a soundproofing structure at the end of the CO2 tail gas emission pipeline. Utility Model Content

[0003] The main purpose of this utility model is to provide a silencer structure at the end of a CO2 exhaust pipeline, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] The CO2 exhaust gas emission pipeline end-silencing structure includes a CO2 exhaust gas emission chimney, a CO2 exhaust gas inlet pipeline fixedly connected to the lower part of the outer surface of the CO2 exhaust gas emission chimney, a CO2 exhaust gas outlet pipeline fixedly connected to the upper end of the CO2 exhaust gas emission chimney, a switch valve movably installed on the outer surface of the CO2 exhaust gas outlet pipeline, a spiral flow guiding noise reduction component fixedly connected to the upper end of the CO2 exhaust gas outlet pipeline, a CO2 exhaust gas emission pipeline fixedly connected to the upper end of the spiral flow guiding noise reduction component, a sound insulation component fixedly sleeved on the upper part of the outer surface of the CO2 exhaust gas emission pipeline, and a silencer component fixedly connected to the upper end of the CO2 exhaust gas emission pipeline.

[0006] The sound insulation component includes an inner glass fiber cotton, the outer surface of which is wrapped with a rubber damping sheet, the outer surface of which is wrapped with an outer glass fiber cotton, the outer surface of which is wrapped with a polyurethane flame-retardant and waterproof membrane, and a metal shell is fixedly fitted onto the outer surface of the polyurethane flame-retardant and waterproof membrane. The inner glass fiber cotton is wrapped around the outer surface of the CO2 exhaust gas emission pipeline.

[0007] Preferably, the spiral flow guiding noise reduction assembly includes a fixed ring, the upper end of which has three through-hole CO2 exhaust gas ventilation chambers, the middle of the upper end of the fixed ring is fixedly connected to an inner core, the outer surface of the inner core is fixedly connected to spiral flow guiding noise reduction blades, and the lower end of the fixed ring is fixedly connected to the upper end of the CO2 exhaust gas outlet pipeline.

[0008] By adopting the above technical solution, the spiral flow-guiding and noise-reducing blades on the outer surface of the inner core can change the flow direction of the exhaust gas, making it change from a straight flow to a spiral flow. This change greatly reduces the direct collision and friction between the exhaust gas and the inner wall of the CO2 exhaust gas emission pipeline.

[0009] Preferably, the three CO2 exhaust gas ventilation chambers are arranged in a ring array around the center of a fixed ring.

[0010] By adopting the above technical solution, the three CO2 exhaust gas ventilation chambers arranged in a ring array on the fixed ring can make the exhaust gas flowing out of the CO2 exhaust gas outlet pipeline enter the CO2 exhaust gas emission pipeline evenly.

[0011] Preferably, the upper end of the fixing ring is fixedly connected to the lower end of the CO2 exhaust gas emission pipeline, and the inner core and the spiral flow guide noise reduction blade are both located inside the CO2 exhaust gas emission pipeline, with a gap between the spiral flow guide noise reduction blade and the inner wall surface of the CO2 exhaust gas emission pipeline.

[0012] By adopting the above technical solution, the gap between the spiral guide noise reduction blade and the inner wall of the CO2 exhaust gas pipeline ensures that the exhaust gas has sufficient flow space, preventing the exhaust gas flow from being obstructed due to the small distance between the spiral guide noise reduction blade and the wall of the CO2 exhaust gas pipeline, and ensuring that the emission efficiency is not affected.

[0013] Preferably, the silencing component includes a lower flange and bolts, with a plurality of bolts. The upper end of the lower flange is fixedly connected to a gasket and an upper flange by a plurality of bolts, with the gasket located between the lower flange and the upper flange. A perforated sound-absorbing plate is fixedly sleeved inside the upper flange. The outer surface of the perforated sound-absorbing plate has a plurality of through-holes for sound absorption. The lower end of the lower flange is fixedly connected to the upper end of the CO2 exhaust gas emission pipeline.

[0014] By adopting the above technical solution, the porous sound-absorbing panel has several internal and external through-holes arranged in a ring array on its outer surface, which can efficiently absorb noise in the exhaust gas. When the exhaust gas passes through the porous sound-absorbing panel, the noise sound waves are continuously reflected and refracted in the sound-absorbing holes, and friction occurs with the internal structure of the sound-absorbing panel, thereby achieving a significant reduction in noise.

[0015] Preferably, a number of the bolts are arranged in a central annular array below the flange, and a number of the sound-absorbing holes are arranged in a central annular array around the porous sound-absorbing plate.

[0016] By adopting the above technical solution, several sound-absorbing holes are distributed in a circular array around the center of the porous sound-absorbing plate, ensuring that the exhaust gas can evenly contact the sound-absorbing holes no matter which angle it approaches the porous sound-absorbing plate from.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] In this invention, by setting a spiral flow-guiding noise reduction component, the three CO2 exhaust gas ventilation chambers arranged in a ring array on the fixed ring can make the exhaust gas enter the CO2 exhaust gas emission pipeline evenly, while the spiral flow-guiding noise reduction blades on the outer surface of the inner core can change the straight flow of the exhaust gas into a spiral forward movement, which greatly reduces the direct collision and friction between the exhaust gas and the inner wall of the CO2 exhaust gas emission pipeline, and reduces the noise intensity from the source of noise generation.

[0019] In this invention, the inner glass fiber cotton of the sound insulation component is loose and porous, which can effectively absorb noise and convert it into heat energy for consumption. The rubber damping sheet can not only absorb some noise, but also suppress the vibration of the pipe and reduce the noise caused by vibration. The outer glass fiber cotton further absorbs residual noise. The polyurethane flame-retardant and waterproof membrane not only plays a role in waterproofing and flame retardancy, but also assists in sound insulation. The outermost metal shell enhances the strength of the overall structure, protects the internal sound insulation material, and reflects some noise, thus achieving multiple barriers to the noise generated by the exhaust gas flow.

[0020] In this invention, the porous sound-absorbing plate of the silencing component has several sound-absorbing holes arranged in a ring array, which can specifically absorb noise in the exhaust gas. The tight connection of the lower flange, sealing gasket and upper flange ensures the sealing of the connection between the silencing component and the CO2 exhaust gas emission pipeline, so that the exhaust gas must pass through the porous sound-absorbing plate area, thereby allowing the noise to be deeply treated. The exhaust gas after silencing treatment can be discharged into the atmosphere with extremely low noise. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the silencer structure at the end of the CO2 exhaust pipeline of this utility model;

[0022] Figure 2 This utility model relates to a sound-absorbing structure at the end of a CO2 exhaust pipeline. Figure 1 Enlarged view of the structure at point A in the image;

[0023] Figure 3 This is a schematic diagram of the spiral flow guiding noise reduction component of the CO2 exhaust gas emission pipeline end silencing structure of this utility model (the CO2 exhaust gas emission pipeline is cut out).

[0024] Figure 4 This is a schematic diagram of the sound insulation component of the CO2 exhaust gas emission pipeline end-soundproofing structure of this utility model;

[0025] Figure 5 This utility model relates to a sound-absorbing structure at the end of a CO2 exhaust pipeline. Figure 4 Enlarged view of the structure at point B in the image;

[0026] Figure 6 This is a schematic diagram of the silencing component of the CO2 exhaust gas emission pipeline end silencing structure of this utility model;

[0027] Figure 7 An exploded view of the silencing component of the CO2 exhaust gas emission pipeline end silencing structure of this utility model;

[0028] Figure 8 This utility model relates to a sound-absorbing structure at the end of a CO2 exhaust pipeline. Figure 7 Enlarged view of the structure at point C.

[0029] In the diagram: 1. CO2 exhaust chimney; 2. CO2 exhaust inlet pipeline; 3. CO2 exhaust outlet pipeline; 4. Switch valve; 5. Spiral flow guide noise reduction assembly; 6. CO2 exhaust pipeline; 7. Sound insulation assembly; 8. Silencing assembly; 51. Fixing ring; 52. CO2 exhaust ventilation chamber; 53. Inner core; 54. Spiral flow guide noise reduction blades; 71. Inner glass fiber cotton; 72. Rubber damping sheet; 73. Outer glass fiber cotton; 74. Polyurethane flame-retardant waterproof membrane; 75. Metal shell; 81. Lower flange; 82. Sealing gasket; 83. Upper flange; 84. Bolt; 85. Perforated sound-absorbing panel; 86. Sound-absorbing hole. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of this application, unless otherwise stated, "multiple" means two or more.

[0032] Example 1

[0033] The CO2 exhaust gas emission pipeline end silencing structure includes a CO2 exhaust gas emission chimney 1, a CO2 exhaust gas inlet pipeline 2 fixedly connected to the lower part of the outer surface of the CO2 exhaust gas emission chimney 1, a CO2 exhaust gas outlet pipeline 3 fixedly connected to the upper end of the CO2 exhaust gas emission chimney 1, a switch valve 4 movably installed on the outer surface of the CO2 exhaust gas outlet pipeline 3, a spiral flow guiding noise reduction component 5 fixedly connected to the upper end of the CO2 exhaust gas outlet pipeline 3, a CO2 exhaust gas emission pipeline 6 fixedly connected to the upper end of the spiral flow guiding noise reduction component 5, a sound insulation component 7 fixedly sleeved on the upper part of the outer surface of the CO2 exhaust gas emission pipeline 6, and a silencing component 8 fixedly connected to the upper end of the CO2 exhaust gas emission pipeline 6.

[0034] In this embodiment, the sound insulation component 7 includes an inner glass fiber cotton 71, the outer surface of which is wrapped with a rubber damping sheet 72, the outer surface of which is wrapped with an outer glass fiber cotton 73, the outer surface of which is wrapped with a polyurethane flame-retardant and waterproof membrane 74, and a metal shell 75 is fixedly fitted onto the outer surface of the polyurethane flame-retardant and waterproof membrane 74. The inner glass fiber cotton 71 is wrapped around the outer surface of the CO2 exhaust gas emission pipeline 6. The spiral flow-guiding noise reduction component 5 includes a fixing ring 51, the upper end of which has three vertically penetrating CO2 exhaust gas ventilation chambers 52, the middle of the upper end of which is fixedly connected with an inner core 53, the outer surface of which is fixedly connected with a spiral flow-guiding noise reduction blade 54, and the lower end of which is fixedly connected to the upper end of the CO2 exhaust gas outlet pipeline 3. The three CO2 exhaust gas ventilation chambers 52 are arranged in a ring array around the center of the fixing ring 51. The upper end of the fixed ring 51 is fixedly connected to the lower end of the CO2 exhaust gas pipeline 6. The inner core 53 and the spiral flow guide noise reduction blade 54 are both located inside the CO2 exhaust gas pipeline 6, and there is a gap between the spiral flow guide noise reduction blade 54 and the inner wall of the CO2 exhaust gas pipeline 6. The silencing component 8 includes a lower flange 81 and bolts 84. Several bolts 84 are provided. The upper end of the lower flange 81 is fixedly connected to a sealing gasket 82 and an upper flange 83 by several bolts 84, and the sealing gasket 82 is located between the lower flange 81 and the upper flange 83. A perforated sound-absorbing plate 85 is fixedly sleeved inside the upper flange 83. Several perforated sound-absorbing holes 86 are opened on the outer surface of the perforated sound-absorbing plate 85. The lower end of the lower flange 81 is fixedly connected to the upper end of the CO2 exhaust gas pipeline 6. Several bolts 84 are distributed in a central ring array in the lower flange 81, and several sound-absorbing holes 86 are distributed in a central ring array in the perforated sound-absorbing plate 85.

[0035] It should be noted that this utility model is a noise reduction structure at the end of a CO2 exhaust gas pipeline. During use, CO2 exhaust gas enters the CO2 exhaust gas chimney 1 through the CO2 exhaust gas inlet pipeline 2. When the switch valve 4 is opened, the CO2 exhaust gas in the CO2 exhaust gas chimney 1 flows out through the CO2 exhaust gas outlet pipeline 3. The exhaust gas enters the spiral flow-guiding noise reduction component 5, and then passes through three CO2 exhaust gas ventilation chambers 52 arranged in a ring array on the fixed ring 51, entering the CO2 exhaust gas pipeline 6. Inside the CO2 exhaust gas pipeline 6, the exhaust gas comes into contact with the spiral flow-guiding noise reduction blades 54 fixed to the outer surface of the inner core 53. The spiral flow-guiding noise reduction blades 54 change the flow direction of the exhaust gas, causing it to move forward in a spiral shape, reducing the interaction between the exhaust gas and CO2. 2. Direct collision and friction with the inner wall of the exhaust gas emission pipeline 6 reduces noise generation. After the exhaust gas is treated by spiral flow noise reduction, it continues to flow upward in the CO2 exhaust gas emission pipeline 6. At this time, the sound insulation component 7 wrapped around the outer surface of the CO2 exhaust gas emission pipeline 6 plays a role. The inner glass fiber cotton 71, rubber damping sheet 72, outer glass fiber cotton 73 and polyurethane flame retardant waterproof membrane 74 absorb and block the noise generated by the exhaust gas flow in sequence. The outermost metal shell 75 enhances the overall structural strength and assists in sound insulation. The exhaust gas finally reaches the sound-absorbing component 8. Several sound-absorbing holes 86 distributed in a ring array on the porous sound-absorbing panel 85 further absorb the noise generated by the exhaust gas flow. Finally, the exhaust gas treated by sound absorption is discharged into the atmosphere.

[0036] In the embodiments provided in this application, it should be understood that the disclosed systems, modules, and methods can be implemented in other ways. For example, the module embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between modules or units, and may be electrical, mechanical, or other forms.

[0037] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. This application is not limited to the exact structures described above and illustrated in the accompanying drawings, and it should not be considered that the specific implementation of this application is limited to these descriptions. For those skilled in the art, various changes and modifications made without departing from the concept of this application should be considered to fall within the protection scope of this application.

Claims

1. A CO2 tail gas venting line end silencing structure comprising a CO2 tail gas venting stack (1), characterized by: The outer surface of the CO2 tail gas emission chimney (1) is fixedly connected with a CO2 tail gas inlet pipeline (2), the upper end of the CO2 tail gas emission chimney (1) is fixedly connected with a CO2 tail gas outlet pipeline (3), the outer surface of the CO2 tail gas outlet pipeline (3) is movably connected with an on-off valve (4), the upper end of the CO2 tail gas outlet pipeline (3) is fixedly connected with a spiral flow guide noise reduction assembly (5), the upper end of the spiral flow guide noise reduction assembly (5) is fixedly connected with a CO2 tail gas discharge pipeline (6), the outer surface of the CO2 tail gas discharge pipeline (6) is fixedly sleeved with a sound insulation assembly (7), and the upper end of the CO2 tail gas discharge pipeline (6) is fixedly connected with a sound reduction assembly (8). The sound insulation assembly (7) comprises inner glass fiber cotton (71), the outer surface of the inner glass fiber cotton (71) is wrapped with a rubber damping sheet (72), the outer surface of the rubber damping sheet (72) is wrapped with outer glass fiber cotton (73), the outer surface of the outer glass fiber cotton (73) is wrapped with polyurethane flame-retardant waterproof roll material (74), the outer surface of the polyurethane flame-retardant waterproof roll material (74) is fixedly sleeved with a metal shell (75), and the inner glass fiber cotton (71) is wrapped on the outer surface of the CO2 tail gas discharge pipeline (6).

2. The CO2 tail gas exhaust line end muffling structure of claim 1, wherein: The spiral flow guide noise reduction assembly (5) comprises a fixed ring (51), three CO2 tail gas ventilation cavities (52) are formed in the upper end of the fixed ring (51), an inner core (53) is fixedly connected to the upper end of the fixed ring (51), a spiral flow guide noise reduction blade (54) is fixedly connected to the outer surface of the inner core (53), and the lower end of the fixed ring (51) is fixedly connected with the upper end of the CO2 tail gas outlet pipeline (3).

3. The CO2 tail gas exhaust line end muffling structure of claim 2, wherein: The three CO2 tail gas ventilation cavities (52) are arranged in a central annular array of the fixed ring (51).

4. The CO2 tail gas exhaust line end muffling structure of claim 2, wherein: The upper end of the fixed ring (51) is fixedly connected with the lower end of the CO2 tail gas discharge pipeline (6), and the inner core (53) and the spiral flow guide noise reduction blade (54) are located in the CO2 tail gas discharge pipeline (6) and there is a gap between the spiral flow guide noise reduction blade (54) and the inner wall of the CO2 tail gas discharge pipeline (6).

5. The CO2 tail gas exhaust line end muffling structure of claim 1, wherein: The sound reduction assembly (8) comprises a lower flange (81) and a bolt (84), the bolt (84) is provided with a plurality of bolts (84), the lower flange (81) is fixedly connected with a sealing gasket (82) and an upper flange (83) through the plurality of bolts (84), the sealing gasket (82) is located between the lower flange (81) and the upper flange (83), the upper flange (83) is fixedly sleeved with a porous sound absorption board (85), a plurality of sound absorption holes (86) are formed in the outer surface of the porous sound absorption board (85), and the lower end of the lower flange (81) is fixedly connected with the upper end of the CO2 tail gas discharge pipeline (6).

6. The CO2 tail gas exhaust line end muffling structure of claim 5, wherein: The plurality of bolts (84) are arranged in a central annular array of the lower flange (81), and the plurality of sound absorption holes (86) are arranged in a central annular array of the porous sound absorption board (85).

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