Abstract: During actual operation, urban natural gas desulfurization stations generate various types of noise pollution, including gas flow noise, mechanical vibration noise, and process operation noise, which can easily disrupt the lives of surrounding residents. Based on an analysis of the noise generation causes and propagation characteristics in these stations, a systematic investigation has identified high-noise equipment and facilities within the stations, such as circulating cooling water towers, pump sets, air separation units, and high-speed pipelines. The noise exhibits characteristics of a wide frequency band and a composite superposition of low, medium, and high frequencies, with a maximum noise level reaching 96 dB(A). By comparing different noise identification and control technologies, a comprehensive noise control plan has been proposed, encompassing "source optimization control, sound absorption and noise reduction treatment, and sound barrier isolation." This plan involves measures such as installing additional sound absorption and insulation barriers, equipping devices with soundproof enclosures and silencers, and wrapping pipelines for noise reduction. After the implementation of this control plan, the average equivalent sound level at the plant boundary can be maintained below 47 dB(A), which is superior to the noise standard requirements for Class II sound environment functional areas specified in the "Emission Standard for Industrial Enterprise Boundary Environmental Noise" (GB12348—2008). The average noise reduction for the main high-noise equipment and facilities is 19.6 dB(A).

Key words: noise control, natural gas desulfurization station, wrapping noise reduction, noise source control, sound absorption and insulation barrier, acoustic array technology, noise spectrum