电厂排烟管导流低频消声器
By employing a silencing mechanism using ultra-micro perforated plates and microporous sound absorbers in the power plant's flue gas system, combined with motor-driven guide plate adjustment, the problems of poor low-frequency noise silencing effect and insufficient adaptability of the guide device have been solved, achieving efficient and stable silencing effect and simplified operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING JINGBAO ACOUSTICS TECH CO LTD
- Filing Date
- 2025-09-15
- Publication Date
- 2026-07-17
AI Technical Summary
Existing silencers are ineffective at reducing low-frequency noise in power plant flue gas systems, and their flow guiding devices cannot adapt to changes in operating conditions, resulting in low noise reduction efficiency and cumbersome operation.
The system employs a noise reduction mechanism that includes an ultra-microperforated plate and a microporous sound absorber, combined with a dynamically adjustable guide plate structure. The guide plate is driven by a motor to change its tilt angle, thereby achieving efficient noise reduction for low-frequency noise and stable airflow.
It improves the noise reduction efficiency of low-frequency noise, ensures the stable operation of the silencer under changing operating conditions, simplifies the operation process, and improves work efficiency.
Smart Images
Figure CN224516298U_ABST
Abstract
Claims
1. A low-frequency silencer for a power plant stack, characterized in that, include: The outer shell (1) has a flow guide pipe (5) connected to its bottom. The noise reduction mechanism (4) includes a support perforated plate (401) disposed inside the outer shell (1). The top of the support perforated plate (401) is provided with an ultra-micro perforated plate (402). The ultra-micro perforated plate (402) is provided with two microporous sound absorbers (403) inside. The two microporous sound absorbers (403) are configured to be perpendicular to each other. The microporous sound absorbers (403) absorb noise through micropores. The flow guiding mechanism (6) includes a mounting shell (601) disposed inside the flow guiding pipe (5). Multiple flow guiding plates (605) are arranged around the top of the mounting shell (601) along the axis. The multiple flow guiding plates (605) are configured to rotate synchronously. The flow guiding plates (605) change the gas flow rate by changing the tilt angle.
2. The low-frequency silencer for smoke duct of power plant according to claim 1, characterized in that, The silencing mechanism (4) also includes a bottom cover (404) connected to the bottom of the outer shell (1), and the bottom of the bottom cover (404) is provided with a passage plate (405).
3. The low-frequency sound absorber for smokestack of power plant according to claim 1, characterized in that, The bottom of the inner wall of the mounting housing (601) is rotatably connected to a conversion gear set (602), one end of which is engaged with a driven gear (603), and one side of the driven gear (603) is connected to a connecting post (604), one end of which is embedded inside the guide plate (605).
4. The low-frequency silencer for smoke duct of power plant according to claim 3, characterized in that, The drive gear (606) is engaged at the end of the gear set (602) away from the driven gear (603), and a rotating shaft (607) is connected to one side of the drive gear (606).
5. The low-frequency sound damper for smokestacks of power plants according to claim 1, characterized in that, A motor (608) is installed on the outer wall of the guide pipe (5). The output end of the motor (608) is connected to one end of the rotating shaft (607). A protective shell (7) is fitted around the motor (608).
6. The low-frequency sound damper for smokestacks of power plants according to claim 1, characterized in that, The outer shell (1) has a nonagonal cross-sectional shape, and multiple support plates (2) are arranged around the outer wall of the outer shell (1) along the axis. A cover plate (3) is connected to the top of the outer shell (1).