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Noise pollution has become an invisible obstacle to the sustainable development of purification plants. A World Health Organization study shows that long-term exposure to noise levels above 85dB can lead to occupational hearing loss. A sewage plant worker was diagnosed with moderate noise-induced hearing loss after working in a 92.6dB blower room for 21 years. As a national high-tech enterprise, Sanyuan Environment has been deeply engaged in acoustic environment management for nearly 20 years, providing comprehensive solutions for purification plants using its "four-dimensional noise reduction technology system."
Core Hazard Data
• Occupational hearing loss: 16% of adult hearing loss worldwide is caused by exposure to noise at work
• Typical case: A 92.6dB noise environment caused a 21-year-long employee to suffer from moderate occupational noise-induced hearing loss
• Compliance risk: noise levels in some purification plants exceed the limits set in GB 12348-2008
Noise source analysis: main noise types and characteristics in purification plants
Equipment Noise: Spectral Characteristics of Core Noise Sources
Noise in purification plants primarily originates from power equipment. Roots blowers can generate up to 92.6dB of operating noise, while water impact noise in the intake pump room is approximately 75.3dB. Different equipment exhibits unique spectral characteristics: fans primarily emit medium- and high-frequency vibrations, pumps contain a significant amount of low-frequency vibration, and air compressors exhibit broadband noise.
Auxiliary noise sources: the superposition of airflow and water flow noise
Excessive airflow speed in the ducts of a purification air conditioning system generates additional airflow noise, which adds to the noise from the equipment. Actual measurements show that untreated ventilation ducts can increase overall noise by 5-8dB, becoming a hidden factor in exceeding standards.
Legal and regulatory requirements: The bottom line of compliance for noise control in purification plants
National mandatory standards: noise limits at factory boundaries and clean rooms
GB 12348-2008 clearly stipulates that Class 3 noise zones within the boundaries of purification plants must adhere to daytime limits of 65dB and nighttime limits of 55dB. GB 50073-2013 requires that cleanroom airborne noise levels be ≤60dB for non-unidirectional flow and ≤65dB for unidirectional flow. A natural gas purification plant was ordered by environmental protection authorities to suspend operations and rectify its boundary noise levels by 23dB.
Industry management requirements: pollutant discharge permits and the "three simultaneous" system
The Ministry of Ecology and Environment requires full coverage of industrial noise emission permits by 2025. Enterprises must implement noise control measures during the project design phase. Sanyuan Environment's "full-process compliance services" ensure project compliance from environmental impact assessment to acceptance.
Treatment method: Sanyuan Environmental "Four-dimensional Noise Reduction Technology System"
Sound source control: reducing noise energy at the source
The patented matrix muffler achieves broadband noise reduction through a honeycomb-shaped, small-pore structure. In a satellite station exhaust fan treatment case, noise levels were reduced from 96dB to 55dB, meeting the GB 3096-2008 Class 1 standard. The accompanying intelligent vibration damping base reduces equipment vibration transmissibility by over 80%.
Blocking the propagation path: Building a three-dimensional acoustic barrier
Leveraging a combined "sound absorption + sound insulation + noise reduction + vibration reduction" solution: turbine soundproof enclosures (insertion loss 35dB) + cooling tower noise reduction vanes (22dB noise reduction) + plant boundary folded plate sound barriers (6m high). After implementation at a thermal power plant, plant boundary noise levels dropped from 68dB to 48dB, meeting Class II standards.
Reception point protection: innovative application of ventilation and sound insulation windows
For sensitive areas such as control rooms and duty rooms, customized ventilation and sound insulation windows are used:
• Acoustic performance: 92% blocking efficiency for mid- and high-frequency noise, 60% improvement in low-frequency vibration transmission loss
• Ventilation design: labyrinth-type silencer channel, closed window ventilation volume 60-120m³/h
• Project case: After the renovation of the duty room of a purification plant in Chengdu, the noise level was reduced from 72dB to 42dB, while achieving a PM2.5 filtration efficiency of 99%.
Conclusion: Protecting a green acoustic environment with technological innovation
Sanyuan Environment, through its comprehensive "consulting-design-production-construction" service chain, has provided noise control solutions to numerous purification plants nationwide, achieving an average noise reduction of 35dB and a 100% project acceptance rate. With the deepening implementation of the Noise Pollution Prevention and Control Law, selecting a professional noise reduction solution is not only a compliance requirement but also a strategic investment in sustainable business development.
Technology empowers green development : Sanyuan Environment, a national high-tech enterprise, holds over 100 patents and can provide customized noise control solutions for purification plants, allowing production and the environment to coexist harmoniously.