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疾速通道
电力行业噪声节制




噪声题目


机器动力声:以装备运行、振动、磨擦、碰撞而发生的中低频噪声。 

气体动力声:以各类风机、风管道、蒸汽管道中高压气流勾当、扩容、切 流、排汽、漏气等而发生的低、中、高频各类频谱的夹杂而成。此中各类排汽为超高频噪声,对情况搅扰尤其明显。 

熄灭噪声:汽锅内熄灭、汽化、烟气勾当、对流进程中发生的低中频噪声。 

电磁声:电念头、励磁机、变压器和别的电器装备、磁场交变进程中产 生的低中频噪声。 

交通噪声:厂区内运输,和别的运输装备发生的噪声,此中喇叭、汽笛 声属高频噪声。 

别的噪声:水动力声(如冷却塔落水声)、播送、人类勾当所发生的噪声。 此中冷却塔噪声对厂界外情况的影响较大,且管理难度也大。今朝很多厂界噪声不能达标的电厂,大都是因为冷却塔的噪声而至。

 

处理计划


节制装备噪声 

在设想中尽能够选用低噪声装备,对磨煤机、汽轮机等装备设隔声罩,送风 机送风口和汽锅排汽口装设消音器,可减小装备的噪声强度。 

公道规划 

在厂区整体安排时,将噪声源较集合的主厂房安排在厂区中部,别的首要噪 声源亦尽能够阔别厂界,削减电厂产业噪声对外情况的影响。

 

 

Noise problems

Mechanical power noise: it refers to the low and medium-frequency noise caused by running, vibration, friction and collision of equipment.  
Pneumatic power noise: it refers to the low, medium and high-frequency noise caused by high-pressure airflow, capacity expansion, tangential flow, exhaust steam, and air leakage in various sorts of fans, air ducts and steam tubes, among which the exhaust steam produces high-frequency noise and has remarkable influence on environment.
Combustion noise: it refers to the low and medium-frequency noise caused in the processes of combustion, vaporization, exhaust gas movement and convection in boiler.
Electromagnetic noise: it refers to the low and medium-frequency noise caused by motor, exciter, transformer and other electrical equipments in the alternating process of magnetic field.
Traffic noise: it refers to the noise caused by the transportation vehicles within the factory, among which the horn sound and the siren are of high-frequency noise.
Other noise: it refers to the noise caused by hydrodynamic force (such as the sound of cooling tower), broadcast and human activity, among which the noise of cooling tower has huge influence on the environment outside of the factory, and is hard to control. Currently,  as for most power plants which noise produced within the factory boundary fails to meet the noise control requirement , most of its noise is caused by the cooling tower.


Solutions

Control over Equipment Noise
    The low-noise equipment must be given priorities as much as possible when designing; and the sound insulation hood to be particularly installed for the coal mill, steam turbine and other equipment, and  mufflers to be installed at the air supply outlet of draught fan and the exhaust gas outlet of boiler to reduce noise strength.

Rational layout
    When designing the overall layout, the buildings producing too much noise can be arranged in the center of the factory, the other noise sources can be arranged far away from the factory boundary; such layout and arrangement can help minimize the influence of industrial noise on external environment.