Regenerative chamber oxidizing furnace valve exhaust active noise reduction device

Abstract

This utility model relates to an active noise reduction device for exhaust gas from a regenerative oxidizer valve, belonging to the technical field of regenerative oxidizer valves. It includes a mounting base and a valve body disposed on top of the mounting base. The top of the mounting base is equipped with a noise reduction mechanism capable of reducing noise in the valve body. The noise reduction mechanism includes a soundproof enclosure fixedly connected to the top of the mounting base. This active noise reduction device for exhaust gas from a regenerative oxidizer valve integrates a passive sound insulation system and an active noise reduction system into a unified whole. The passive sound insulation layer first absorbs and isolates most mid-to-high frequency noise over a wide frequency band, forming a confined sound field. Based on this, the active noise reduction system precisely cancels out specific low-frequency components and remaining wide-frequency noise that are difficult to eliminate passively. This synergistic mode of passive first action followed by active precise supplementation maximizes the noise reduction effect.

Description

Technical Field

[0001] This utility model relates to the field of valve technology for regenerable oxidizers, specifically to an active noise reduction device for exhaust gas from a regenerable oxidizer valve. Background Technology

[0002] Regenerative thermal oxidizers (RTOs) have become one of the most mainstream and effective technologies for industrial VOCs treatment due to their extremely high heat recovery efficiency and high destruction rate. They perfectly balance treatment effectiveness with operating energy consumption. Although the initial investment is high, their long-term energy-saving benefits are very significant, making them a key piece of equipment for many enterprises to achieve environmental compliance and sustainable development.

[0003] During the continuous operation of an RTO, its core action—the switching of exhaust gas direction—is accomplished by inlet / outlet directional valves and purge valves driven by compressed air. These valves are characterized by frequent operation, fast response, and high driving force, with an operation cycle typically every 1 to 2 minutes. When the valves open or close, the compressed air in the drive mechanism is instantly discharged into the atmosphere, generating strong high-frequency jet noise. This noise is characterized by high sound pressure level, wide frequency band, and long propagation distance, causing serious noise pollution to the working environment.

[0004] Existing technical solutions are mostly decentralized, lacking a systematic and efficient comprehensive solution. They cannot completely solve the complex noise problem caused by the frequent operation of RTO valves while ensuring normal operation and rapid response, and thus cannot meet production needs. Therefore, an active noise reduction device for exhaust gas from regenerative oxidizer valves is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an active noise reduction device for exhaust gas from a regenerative thermal oxidizer valve. It has the advantage of enhanced noise reduction effect and solves the problem that existing technical solutions are mostly decentralized and lack a systematic and efficient comprehensive solution. They cannot completely solve the complex noise problem caused by the frequent operation of RTO valves while ensuring normal operation and rapid response, and thus cannot meet production needs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an active noise reduction device for exhaust gas from a regenerator oxidation furnace valve, comprising a mounting base and a valve body disposed on the top of the mounting base, wherein the top of the mounting base is provided with a noise reduction mechanism capable of performing noise reduction treatment on the valve body;

[0007] The noise reduction mechanism includes a soundproof box fixedly connected to the top of the mounting base, the valve body is disposed inside the soundproof box, a soundproof board is fixedly connected to the inner wall of the soundproof box, a fixed seat is fixedly connected to the soundproof board, and a secondary sound source capable of sound wave cancellation is fixedly connected to the fixed seat.

[0008] Furthermore, the sound insulation panels are distributed on the four sides of the sound insulation box, and a sound insulation box door is hinged to the front of the sound insulation box.

[0009] Furthermore, both ends of the valve body are fixedly connected to exhaust pipes extending to the outside of the soundproof enclosure, and the inside of the soundproof enclosure is fixedly connected to a soundproof filling ring that is compatible with the exhaust pipes.

[0010] Furthermore, the soundproof enclosure is equipped with a support platform inside, and a fixing plate is fixedly connected to the top of the support platform. A clamping plate that can fix the end of the valve body is hinged to the top of the fixing plate, and a snap-fit ​​structure is installed between the clamping plate and the fixing plate.

[0011] Furthermore, there are two fixing plates, which are symmetrically distributed on the left and right sides of the valve body.

[0012] Furthermore, a damping shock absorber is fixedly connected between the soundproof enclosure and the support platform, and the number of the damping shock absorbers is three.

[0013] Furthermore, an installation sleeve is fixedly connected to the inner bottom wall of the soundproof enclosure, and a damping rod extending into the installation sleeve is fixedly connected to the bottom of the support platform. A buffer spring is fixedly connected between the damping rod and the installation sleeve.

[0014] Compared with the prior art, this utility model provides an active noise reduction device for valve exhaust of a regenerator oxidation furnace, which has the following beneficial effects:

[0015] 1. This active noise reduction device for the exhaust valve of the regenerator oxidizer integrates a passive sound insulation system and an active noise reduction system into an organic whole. The passive sound insulation layer first absorbs and isolates most of the mid-to-high frequency noise in a wide frequency band, forming a confined sound field space. On this basis, the active noise reduction system emits reverse sound waves to precisely cancel out specific low-frequency components that are difficult to eliminate effectively by passive means and the remaining wide frequency noise. This synergistic mode of passive first and active precise supplementation maximizes the noise reduction effect, far exceeding the limits that any single technology can achieve.

[0016] 2. This active noise reduction device for the exhaust of the regenerator oxidizer valve forms a highly efficient multi-stage vibration reduction system through damping shock absorbers, buffer springs, and damping rods. This system can effectively isolate and absorb the mechanical vibration generated during valve operation, preventing the vibration from being transmitted to the housing and building structure through the mounting base, thereby cutting off the solid-borne sound transmission path, further improving the overall noise reduction effect, and protecting the valve and its pipeline from vibration damage. It solves the problem that existing technical solutions are mostly decentralized and lack a systematic and efficient comprehensive solution. They cannot completely solve the complex noise problem generated by the frequent operation of RTO valves while ensuring normal operation and rapid response, and thus cannot meet production needs. Attached Figure Description

[0017] Figure 1 This is a perspective view of the present utility model;

[0018] Figure 2 This is a sectional perspective view of the present invention;

[0019] Figure 3 This is a perspective view of the damping shock absorber of this utility model;

[0020] Figure 4 This is a sectional perspective view of the mounting sleeve of this utility model.

[0021] In the diagram: 1. Mounting base; 2. Soundproof enclosure; 3. Valve body; 4. Soundproof panel; 5. Fixing base; 6. Secondary sound source; 7. Soundproof enclosure door; 8. Exhaust pipe; 9. Support platform; 10. Fixing plate; 11. Clamping plate; 12. Snap-fit ​​structure; 13. Damping shock absorber; 14. Mounting sleeve; 15. Damping rod; 16. Buffer spring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1 and Figure 2This embodiment of an active noise reduction device for exhaust valves of a regenerator oxidizer includes a mounting base 1 and a valve body 3 disposed on the top of the mounting base 1. The top of the mounting base 1 is provided with a noise reduction mechanism capable of noise reduction treatment of the valve body 3. The noise reduction mechanism includes a soundproof box 2 fixedly connected to the top of the mounting base 1. The valve body 3 is disposed inside the soundproof box 2. A soundproof plate 4 is fixedly connected to the inner wall of the soundproof box 2. A fixing seat 5 is fixedly connected to the soundproof plate 4. A secondary sound source 6 capable of sound wave cancellation is fixedly connected to the fixing seat 5.

[0024] Specifically, the sound insulation panels 4 are distributed on the four sides inside the sound insulation box 2. The front of the sound insulation box 2 is hinged with a sound insulation box door 7. Both ends of the valve body 3 are fixedly connected to exhaust pipes 8 extending to the outside of the sound insulation box 2. The inside of the sound insulation box 2 is fixedly connected with a sound insulation filling ring that matches the exhaust pipes 8.

[0025] It should be noted that the secondary sound source 6 is a high-performance loudspeaker, which achieves active noise reduction by generating sound waves with the opposite phase and the same amplitude as the original noise. The sound insulation board 4 is a porous sound-absorbing material, preferably centrifugal glass wool, rock wool or foam aluminum. The sound insulation box 2 adopts a double-layer steel plate structure with damping material in the middle to form a mass-spring-mass system, which further improves the sound insulation effect.

[0026] Please see Figure 1 and Figure 3 In this embodiment, a support platform 9 is provided inside the soundproof box 2. A fixing plate 10 is fixedly connected to the top of the support platform 9. A clamping plate 11 that can fix the end of the valve body 3 is hinged to the top of the fixing plate 10. A snap-fit ​​structure 12 is installed between the clamping plate 11 and the fixing plate 10.

[0027] Specifically, there are two fixing plates 10, which are symmetrically distributed on the left and right sides of the valve body 3. The inner surface of the clamping plate 11 is lined with anti-slip rubber pads to increase the friction with the valve body 3 and prevent it from shifting during operation.

[0028] It should be noted that the clamping structure 12 enables the quick locking and releasing of the clamping plate 11. When the valve needs to be repaired or replaced, simply unfasten the clamping and rotate the clamping plate 11 to remove the valve body 3, which greatly improves maintenance efficiency. An appropriate gap is maintained between the support platform 9 and the valve body 3 to avoid rigid contact that transmits vibration and noise.

[0029] Please see Figure 1 , Figure 3 and Figure 4In this embodiment, a damping shock absorber 13 is fixedly connected between the soundproof enclosure 2 and the support platform 9. There are three damping shock absorbers 13. An installation sleeve 14 is fixedly connected to the inner bottom wall of the soundproof enclosure 2. A damping rod 15 extending into the installation sleeve 14 is fixedly connected to the bottom of the support platform 9. A buffer spring 16 is fixedly connected between the damping rod 15 and the installation sleeve 14.

[0030] Specifically, the damping shock absorber 13 adopts a hydraulic damping structure, and its damping coefficient is precisely calculated to effectively suppress vibrations within a specific frequency range. The stiffness coefficient of the buffer spring 16 is matched with that of the damping shock absorber 13 to form the best vibration reduction effect.

[0031] It should be noted that the damping shock absorber 13 mainly absorbs low-frequency vibration energy, while the buffer spring 16 isolates medium and high-frequency vibrations. The inner wall of the mounting sleeve 14 is equipped with a wear-resistant bushing to ensure the stability and durability of the damping rod 15 in long-term reciprocating motion. This combined vibration reduction design can effectively block the mechanical vibration generated by the valve operation from being transmitted to the external structure through the mounting seat 1, thereby reducing noise generation from the source of vibration.

[0032] The working principle of the above embodiments is as follows:

[0033] When the valve body 3 generates noise from exhaust, the sound waves are first blocked by the soundproof enclosure 2. The soundproof panel 4 converts sound energy into heat energy through its porous structure, achieving the first stage of noise attenuation. The soundproof filling ring ensures the acoustic seal at the wall penetration point of the exhaust pipe 8. The noise sensor arranged in the enclosure collects the residual noise signal in real time and transmits it to the active noise reduction controller. The controller analyzes the noise characteristics through an algorithm and drives the secondary sound source 6 to generate corresponding anti-phase sound waves, forming a sound wave interference cancellation zone in the enclosure, achieving precise cancellation of noise at specific frequencies. The mechanical vibration generated by the valve operation is transmitted to the vibration reduction system through the support platform 9. The damping shock absorber 13 and the buffer spring 16 work together to absorb and dissipate most of the vibration energy, effectively preventing the vibration from propagating outward through the mounting base 1 and forming structural noise.

[0034] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that achieves the desired beneficial effect can be implemented. Furthermore, all electrical components in this embodiment are electrically connected to the main controller and power supply. The main controller can be a conventional, known device such as a computer that performs control functions. Those skilled in the art can control the electrical components through simple programming, and the existing disclosed power connection technologies are common knowledge in the field. Therefore, this embodiment will not elaborate further on their specific structural composition and working principles.

[0035] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0036] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A regenerative chamber oxidation furnace valve exhaust active noise reduction device, comprising a mounting seat (1) and a valve body (3) arranged at the top of the mounting seat (1), characterized in that: The top of the mounting base (1) is provided with a noise reduction mechanism that can reduce the noise of the valve body (3); The noise reduction mechanism includes a soundproof box (2) fixedly connected to the top of the mounting base (1), the valve body (3) is located inside the soundproof box (2), a soundproof plate (4) is fixedly connected to the inner wall of the soundproof box (2), a fixing seat (5) is fixedly connected to the soundproof plate (4), and a secondary sound source (6) capable of sound wave cancellation is fixedly connected to the fixing seat (5).

2. The valve exhaust active noise reduction device of the regenerative chamber oxidizing furnace according to claim 1, characterized in that: The sound insulation panels (4) are distributed on the four sides inside the sound insulation box (2), and the front of the sound insulation box (2) is hinged with a sound insulation door (7).

3. The valve exhaust active noise reduction device of the regenerative chamber oxidizer according to claim 1, characterized in that: Both ends of the valve body (3) are fixedly connected to exhaust pipes (8) extending to the outside of the soundproof box (2), and the inside of the soundproof box (2) is fixedly connected to a soundproof filling ring that is compatible with the exhaust pipes (8).

4. The valve exhaust active noise reduction device of the regenerative chamber oxidizer according to claim 1, characterized in that: The soundproof enclosure (2) is provided with a support platform (9) inside. A fixing plate (10) is fixedly connected to the top of the support platform (9). A clamp (11) that can fix the end of the valve body (3) is hinged to the top of the fixing plate (10). A snap-fit ​​structure (12) is installed between the clamp (11) and the fixing plate (10).

5. The valve exhaust active noise reduction device of a regenerative oxidizing furnace according to claim 4, characterized in that: There are two fixing plates (10), which are symmetrically distributed on the left and right sides of the valve body (3).

6. The valve exhaust active noise reduction device of a regenerative oxidizing furnace according to claim 4, characterized in that: A damping shock absorber (13) is fixedly connected between the soundproof enclosure (2) and the support platform (9), and the number of the damping shock absorbers (13) is three.

7. The valve exhaust active noise reduction device of a regenerative oxidizing furnace according to claim 4, characterized in that: An installation sleeve (14) is fixedly connected to the inner bottom wall of the soundproof box (2), and a damping rod (15) extending into the installation sleeve (14) is fixedly connected to the bottom of the support platform (9). A buffer spring (16) is fixedly connected between the damping rod (15) and the installation sleeve (14).

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