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目的了解燃煤发电厂不同容量机组的噪声强度,探索燃煤发电厂噪声关键控制点,为控制噪声危害提供科学依据。方法通过查阅各机组当年竣工验收相关资料,对工作场所中噪声强度和个人8 h等效声级(LAeq.8 h)进行现场检测,将检测结果进行相关汇总和比较分析。结果 300、600和1 000 MW机组工作场所中噪声合格率分别达到97.0%、96.8%、78.2%,1 000 MW机组噪声合格率明显低于治理后的300和600 MW机组(P<0.05)。1 000 MW机组除输煤巡检工外,其余各巡检岗位个体噪声强度均高于300和600MW机组(P<0.05),且机电系统巡检岗位个体噪声强度≥85.0 d B(A)。结论 1 000 MW机组机电系统仍是该企业噪声治理的重点。
Objective To understand the noise intensity of units of different capacity in coal-fired power plants, and to explore the key control points of noise in coal-fired power plants so as to provide a scientific basis for controlling noise hazards. Methods By referring to the data about the completion acceptance of each unit in the year, the noise intensity in the workplace and the individual equivalent sound level (LAeq.8 h) were measured on site, and the results were compared and analyzed. Results The passing rates of noise in workplaces of 300, 600 and 1000 MW units reached 97.0%, 96.8% and 78.2% respectively. The passing rate of noise of 1 000 MW units was significantly lower than that of 300 and 600 MW units after treatment (P <0.05). In addition to the coal inspection workers of 1 000 MW units, the individual noise intensities of the rest of the inspection posts were higher than those of 300 and 600 MW units (P <0.05), and the individual noise intensity of the electromechanical inspection stations was ≥85.0 d B (A). Conclusion The mechatronic system of 1 000 MW unit is still the focus of this enterprise’s noise management.