A multi-stage muffler

Abstract

The utility model discloses a multistage muffler. The multistage muffler comprises: a shell, which is connected with an air inlet pipe at the bottom for receiving exhaust gas; an exhaust port is arranged at the top of the shell for discharging exhaust gas; a first-stage muffling unit is arranged in the shell and comprises a first-stage orifice plate and a second-stage orifice plate; the number of holes uniformly distributed on the two orifice plates is determined according to the hole diameter, air volume and air speed; a second-stage muffling unit comprises a plurality of uniformly distributed XY-type silencers; all the XY-type silencers are connected with the exhaust port through the mounting plate at the upper part of the shell; a third-stage muffling unit comprises a cylindrical silencer, which is wrapped outside all the XY-type silencers and is fixedly connected with the shell. The multistage muffling unit effectively reduces the noise generated when the exhaust gas of the PSA purification equipment is discharged, ensures that the discharge noise is reduced to below 85 dB, meets the environmental noise standard, and thus greatly reduces the negative impact on the production site environment and personnel health.

Description

Technical Field

[0001] This utility model relates to the field of gas treatment technology, and more specifically, to a multi-stage silencer. Background Technology

[0002] In the gas purification process using the PSA method, the adsorption tower needs to analyze and release exhaust gas to prepare for the next adsorption cycle. When the exhaust gas is compressed and released, it undergoes rapid changes, generating loud, piercing noise that severely impacts the production environment and personnel health, and fails to meet environmental standards. Therefore, a highly efficient noise reduction device is urgently needed to reduce emission noise and avoid noise pollution.

[0003] There is currently no effective solution to the problem of loud, ear-piercing noise generated by exhaust emissions in existing technologies. Utility Model Content

[0004] This invention provides a multi-stage silencer to solve the problem of loud, harsh noise generated by exhaust emissions in the prior art.

[0005] To achieve the above objectives, this utility model provides a multi-stage silencer, comprising: a housing with an air inlet pipe connected to its bottom for receiving exhaust gas; an exhaust port provided at the top of the housing for discharging exhaust gas; a primary silencer unit disposed within the housing, comprising a primary perforated plate and a secondary perforated plate; the number of holes evenly distributed on the two perforated plates is determined according to the hole diameter, air volume, and air velocity; a secondary silencer unit comprising multiple evenly distributed XY-type silencers, all of which are connected to the exhaust port via a mounting plate on the upper part of the housing; and a tertiary silencer unit comprising a cylindrical silencer, which is wrapped around all of the XY-type silencers and fixedly connected to the housing.

[0006] Optionally, it also includes: a rain cover; the rain cover is disposed on top of the three-stage noise reduction unit.

[0007] Optionally, it may also include: support legs; the support legs are disposed at the bottom of the housing and are used to support and mount the housing.

[0008] Optionally, the primary orifice plate has holes of a first diameter evenly distributed; the secondary orifice plate has holes of a second diameter evenly distributed; the primary orifice plate is located below the secondary orifice plate; and the first diameter is larger than the second diameter.

[0009] Optionally, it may also include: a filling material; the filling material is a porous sound-absorbing material, used to fill between the primary perforated plate and the secondary perforated plate.

[0010] Optionally, the hole spacing on the primary perforated plate is determined by a first diameter; the hole spacing on the secondary perforated plate is determined by a second diameter.

[0011] Optionally, the number of holes on the primary perforated plate is calculated using the following formula:

[0012] n1 = Q / V / (πd12 / 4);

[0013] The number of holes on the secondary orifice plate is calculated using the following formula:

[0014] n2 = Q / V / (πd22 / 4);

[0015] Where Q is the gas volume, V is the gas velocity, d1 is the first diameter, d2 is the second diameter, n1 is the number of holes on the first-stage orifice plate, and n2 is the number of holes on the second-stage orifice plate.

[0016] Optionally, the XY type muffler is connected to the mounting plate by a thread.

[0017] The beneficial effects of this utility model are:

[0018] This utility model provides a multi-stage silencer, which includes a primary silencer unit, a secondary silencer unit, and a tertiary silencer unit. The multi-stage silencer unit effectively reduces the noise generated during the exhaust gas emission of PSA purification equipment, ensuring that the emission noise is reduced to below 85dB, meeting the environmental noise standards, thereby greatly reducing the negative impact on the production site environment and personnel health. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a multi-stage silencer provided in an embodiment of this utility model;

[0020] Figure 2 This is a top view of the XY type muffler provided in the first embodiment of this utility model;

[0021] Figure 3 This is a top view of the XY type muffler provided in the second embodiment of this utility model.

[0022] Symbol explanation:

[0023] Housing-1, Intake pipe-2, First-stage orifice plate-3, Second-stage orifice plate-4, XY type silencer-5, Cylindrical silencer-6, Rain cover-7, Support leg-8, Filling material-9, Mounting plate-10. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0025] Existing technologies generate significant, ear-piercing noise from exhaust emissions. To address this noise problem, this invention provides a multi-stage silencer. Figure 1 This is a schematic diagram of the structure of a multi-stage silencer provided in an embodiment of this utility model, as shown below. Figure 1 As shown, the multi-stage silencer includes:

[0026] The housing 1 has an air inlet pipe 2 connected to its bottom for receiving exhaust gas; the top of the housing 1 is provided with an exhaust port for discharging exhaust gas.

[0027] Specifically, the housing 1 is constructed in the form of a cylindrical body and a head. The bottom of the housing 1 is connected to an air inlet pipe 2, which is used to receive exhaust gases generated from PSA purification equipment or other industrial processes. The top of the housing 1 is provided with an exhaust port, which is used to discharge the exhaust gases after silencing treatment to the next silencing unit.

[0028] A primary noise reduction unit is installed inside the housing 1 and includes a primary perforated plate 3 and a secondary perforated plate 4; the number of holes evenly distributed on the two perforated plates is determined according to the hole diameter, air volume and air velocity.

[0029] Specifically, the primary orifice plate 3 has holes of a first diameter evenly distributed; the secondary orifice plate 4 has holes of a second diameter evenly distributed; the primary orifice plate 3 is located below the secondary orifice plate 4; the first diameter is larger than the second diameter.

[0030] The first-stage orifice plate 3 uses larger orifice diameters to initially reduce the noise of the airflow, while the second-stage orifice plate 4 uses smaller orifice diameters to further reduce the noise of the airflow, achieving a step-by-step noise reduction effect. The uniform distribution of the orifices ensures uniform noise reduction of the airflow.

[0031] The hole spacing on the primary perforated plate 3 is determined by the first diameter; the hole spacing on the secondary perforated plate 4 is determined by the second diameter.

[0032] In a specific embodiment of this utility model, the first diameter is 5mm, and the hole spacing (the distance between two adjacent holes) on the primary perforated plate 3 is 8 times the first diameter, which is 40mm; the second diameter is 2mm, and the hole spacing (the distance between two adjacent holes) on the secondary perforated plate 4 is 8 times the second diameter, which is 16mm. The reasonable design of the hole spacing facilitates airflow while maximizing the noise reduction effect.

[0033] It should be noted that this utility model does not limit the specific values ​​of the first diameter and the second diameter.

[0034] The number of holes evenly distributed on the two orifice plates is determined based on the orifice diameter, gas volume, and gas velocity;

[0035] The number of holes on the primary perforated plate 3 is calculated using the following formula:

[0036] n1 = Q / V / (πd12 / 4);

[0037] The number of holes on the secondary orifice plate 4 is calculated using the following formula:

[0038] n2 = Q / V / (πd22 / 4);

[0039] Where Q is the gas volume, V is the gas velocity, d1 is the first diameter, d2 is the second diameter, n1 is the number of holes on the first-stage orifice plate 3, and n2 is the number of holes on the second-stage orifice plate 4.

[0040] These two formulas allow for the accurate calculation of the number of holes required on each perforated plate based on air volume, air velocity, and orifice diameter, ensuring the efficient operation of the primary silencing unit.

[0041] In an optional embodiment, the primary perforated plate 3 is made of 5mm thick steel plate, and the secondary perforated plate 4 is made of 2mm thick steel plate.

[0042] Furthermore, the multi-stage silencer also includes: filling material 9;

[0043] The filling material 9 is a porous sound-absorbing material used to fill the space between the primary perforated plate 3 and the secondary perforated plate 4. Specifically, the porous sound-absorbing material can be coconut fiber, ceramic particles, etc. These porous sound-absorbing materials have excellent sound absorption properties, further reducing noise by absorbing sound waves in the airflow.

[0044] The secondary silencing unit includes multiple evenly distributed XY-type mufflers 5, all of which are connected to the exhaust port via the mounting plate 10 on the upper part of the housing 1.

[0045] Specifically, a mounting plate 10 is provided on the upper part of the housing 1, and a threaded seat is provided on the mounting plate 10. A threaded structure is provided at the bottom end of the XY-type silencer 5; the XY-type silencer 5 is connected to the mounting plate 10 by threads. This connection method ensures that the silencer is stable and reliable during use, while facilitating installation and disassembly, reducing maintenance costs. The bottom of the XY-type silencer 5 passes through the top of the housing 1, so that the exhaust gas after noise reduction by the primary silencing unit can undergo secondary noise reduction by passing through the XY-type silencer 5.

[0046] The number of XY-type silencers 5 is determined according to the air volume and the specifications of the housing 1. Figure 2 This is a top view of the XY type muffler 5 provided in the first embodiment of this utility model; Figure 3 This is a top view of the XY-type muffler 5 provided in the second embodiment of this utility model; as shown Figure 2 and Figure 3 As shown, when the volume of exhaust gas is large, the size of the housing 1 is larger, and correspondingly, the number of XY-type silencers 5 is greater, such as... Figure 3 As shown; when the exhaust gas volume is small, the housing 1 is selected with a smaller size, and correspondingly, the number of XY type silencers 5 is also set to be small, such as Figure 2 As shown. The XY type silencer further slows down airflow and reduces noise through collision and friction with the air.

[0047] The three-stage silencing unit includes a cylindrical silencer 6, which is wrapped around the entire XY-type silencer 5 and is fixedly connected to the housing 1.

[0048] Specifically, the cylindrical silencer minimizes exhaust noise through further reflection and absorption. The cylindrical silencer is fixedly connected to the housing 1, providing a stable noise reduction effect. Furthermore, the cylindrical silencer is made of high-quality aluminum alloy, which is heat-resistant and lightweight, effectively reducing airflow noise.

[0049] In an optional embodiment, the multi-stage silencer further includes a rain cover 7; the rain cover 7 is disposed on top of the three-stage silencer unit.

[0050] To protect the internal components of the muffler from rain or other environmental factors, a rain cover 7 is installed on the top of the muffler. The rain cover 7 effectively prevents external moisture from damaging the internal components of the muffler, especially electronic components and sound-absorbing materials, preventing them from being affected by moisture or corrosion, thus extending the sound-absorbing effect and the equipment's lifespan.

[0051] In an optional embodiment, the multi-stage silencer further includes: support legs 8; the support legs 8 are disposed at the bottom of the housing 1 for supporting and mounting the housing 1. These support legs 8 are height-adjustable to ensure the silencer remains stable during operation, effectively reducing vibration and preventing unnecessary vibration of the equipment in high-noise environments. The design of the support legs 8 also facilitates the transportation and installation of the equipment.

[0052] The multi-stage silencer in this embodiment can reduce exhaust noise from approximately 100dB to below 85dB, which complies with national environmental protection standards and meets the noise control requirements of the production site.

[0053] The silencer has low noise fluctuations during operation, and the noise is gradually attenuated as the airflow passes through each level of the silencer unit, ensuring smooth exhaust gas emission.

[0054] The beneficial effects of this utility model are:

[0055] This utility model's multi-stage low-noise silencer, through its multi-stage silencing design (including a primary perforated plate 3, a secondary perforated plate 4, an XY-type silencer 5, and a cylindrical silencer 6), can effectively reduce the noise generated during exhaust gas emissions, lowering the emission noise to below 85dB, meeting environmental protection requirements, and reducing the negative impact of noise on the surrounding environment and human health.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multi-stage silencer, characterized in that, include: The housing has an air inlet pipe connected to its bottom for receiving exhaust gas; the top of the housing has an exhaust port for discharging exhaust gas. A primary noise reduction unit is disposed within the housing and includes a primary perforated plate and a secondary perforated plate; the number of holes evenly distributed on the two perforated plates is determined according to the hole diameter, air volume, and air velocity. The secondary silencing unit includes multiple evenly distributed XY-type mufflers, all of which are connected to the exhaust port via a mounting plate on the upper part of the housing. The three-stage silencing unit includes a cylindrical silencer that surrounds the entire XY-type silencer and is fixedly connected to the housing.

2. The multi-stage silencer according to claim 1, characterized in that, Also includes: Rain cover; The rain cover is installed on top of the three-stage noise reduction unit.

3. The multi-stage silencer according to claim 1, characterized in that, Also includes: Support legs; The support legs are located at the bottom of the housing and are used to support and mount the housing.

4. The multi-stage silencer according to claim 1, characterized in that: The primary orifice plate has holes of a first diameter evenly distributed; the secondary orifice plate has holes of a second diameter evenly distributed; the primary orifice plate is located below the secondary orifice plate; the first diameter is larger than the second diameter.

5. The multi-stage silencer according to claim 4, characterized in that, Also includes: Filler material; The filling material is a porous sound-absorbing material, used to fill the space between the primary perforated plate and the secondary perforated plate.

6. The multi-stage silencer according to claim 1, characterized in that: The hole spacing on the primary perforated plate is determined by a first diameter; the hole spacing on the secondary perforated plate is determined by a second diameter.

7. The multi-stage silencer according to claim 4, characterized in that: The number of holes on the primary perforated plate is calculated using the following formula: n1 = Q / V / (πd12 / 4); The number of holes on the secondary orifice plate is calculated using the following formula: n2 = Q / V / (πd22 / 4); Where Q is the gas volume, V is the gas velocity, d1 is the first diameter, d2 is the second diameter, n1 is the number of holes on the first-stage orifice plate, and n2 is the number of holes on the second-stage orifice plate.

8. The multi-stage silencer according to claim 1, characterized in that: The XY type muffler is connected to the mounting plate by threads.

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