黄葛增压站噪声治理工艺措施

为解决黄葛增压站内4台室外整体式天然气压缩机组造成的噪声污染问题,结合生产运行要求、周边环境状况、噪声源分布及噪声特性,综合吸声、隔声、消声、阻尼减振、通风和泄压等技术,采用半密闭式降噪厂房和阻抗复合排气消声器等治理措施。治理后厂界噪声从64.2～72.1 dB(A)降至49.7～55.0 dB(A),距厂房最近厂界25 Hz声压值从97.9 dB降至84.2 dB,排气消声器出口噪声从84.3 dB(A)降至72.6 dB(A)且25Hz声压值从124.7 dB降至97 dB。厂界噪声达到GB 12348—2008《工业企业厂界环境噪声排放标准》3类要求,中、低频噪声强度减弱,解决了厂界噪声超标和噪声扰民问题。同时,为整体式天然气压缩机组噪声治理开辟了一条新途径,为日后降噪厂房和阻抗复合排气消声器广泛应用奠定了实践基础,为压缩机组噪声治理设计积累了宝贵经验。

Noise Control Measures in Huang-ge Compression Station

In order to control the noise from 4 sets of outdoor integral natural gas compressor groups in Huang-ge compression station,combining the requirements of the production and operation,the environment,the distribution of noise sources and the noise characteristics,integrating the sound absorption,sound insulation,noise elimination,damping vibration,ventilation and pressure relief,the control measures of the semi-closed factory building and the impedance exhaust muffler and so on are used in the project.After being controlled,the boundary noise decreases from 64.2-72.1 dB(A) to 49.7-55.0 dB(A);the sound pressure at 25 Hz from 97.9dB to 84.2 dB at the recent boundary;the equivalent sound level of the outlet of exhaust muffler from 84.3 dB(A) to 72.6 dB(A),and the sound pressure at 25 Hz from 124.7 dB to 97 dB.The boundary noise reaches Ⅲ class standard of GB 12348-2008,the middle and low frequency noise decreases,and the problem of the boundary noise exceeding the upper limit of standard and disturbing residents is solved.The project opens up a new way for the old noise control mode of natural gas compressor group,establishes the foundation of wide application of the noise-control factory and the impedance exhaust muffler,and accumulates experience for the noise-control design of natural gas compressor group.