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目的对某热电厂锅炉磨煤机房噪声治理效果进行评价,分析存在的缺陷,探讨缺陷的成因,以提高噪声治理的效果。方法采用现场职业卫生调查和噪声测量进行分析和综合评价。结果噪声治理后,车间内噪声声级由100.9 dB(A)下降为96.8 dB(A),最优磨煤机隔声罩的隔声量为17.5～19.4 dB(A),平均为18.45 dB(A),没有达到治理目标值。经调查,车间内的主要声源为锅炉磨煤机筒体,次要声源为锅炉磨煤机电机,该厂除了对12台锅炉磨煤机的筒体和1台锅炉磨煤机的电机设置了局部隔声罩外,未采取其他降噪措施。结论该厂锅炉磨煤机房噪声治理方案有缺陷,导致治理效果不理想。
Objective To evaluate the noise control effect of a coal-fired power plant boiler room, analyze the existing defects and discuss the causes of the defects so as to improve the effect of noise control. Methods The field occupational health survey and noise measurement were used for analysis and comprehensive evaluation. Results After the noise management, the noise level in the workshop decreased from 100.9 dB (A) to 96.8 dB (A), and the sound insulation of the optimal coal mill sound insulation cover was 17.5-19.4 dB (A) with an average of 18.45 dB (A ), Did not reach the goal of governance. After investigation, the main source of the workshop for the boiler coal mill cylinder, the secondary source for the boiler mill motor, the plant in addition to the 12 boiler drum and a boiler coal mill motor Set the local noise enclosures, no other noise reduction measures. Conclusion The factory boiler coal mill noise control program has flaws, resulting in poor governance.