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煤油石化噪声节制




噪声题目


煤油石化企业噪声来历很是广。有因为气体压力渐变发生的气流噪声,如紧缩氛围、高压蒸汽放空、加热炉、催化“三机”室等;有因为机器的磨擦、振动、撞击或高速扭转发生的机器性噪声,如:球磨机、氛围锤、原油泵、破坏机、机器性传递带等;有因为磁场交变,脉动引发电器件振动而发生的电磁噪声,如:变压器。

煤油石化企业噪声净化具备普遍性和耐久性。一方面,煤油石化企业出产工艺的庞杂性使得噪声源普遍,影响面大;另外一方面,只需声源不遏制运转,噪声影响就不会遏制,工人就会遭到耐久的噪声搅扰或影响,以是,煤油石化企业中出产性噪声多为高强度的持续性稳态夹杂噪声。


处理计划


石化炼制企业装配噪声综合管理虽有必然难度,但连系装备本身的运转特色接纳符合现实的隔声、消声、吸声、阻尼、减振等综合噪声管理办法。

泵类,泵组两侧装配两道可挪动式的隔声樊篱,阻断和转变泵组噪声的传布。

加热炉,在现有外壳处粘贴一层自粘性阻尼,而后阻尼外再包一层镀锌板,组成一束阻尼隔声密封布局,经由过程装配时较好的密封,下降熄灭器辐射噪声。

紧缩机,作为首要噪声源,包罗机电电磁、机电电扇、连轴器等,采用在噪声处装配U型隔声罩。

厂界噪声,空冷平台及底部风机是厂界的敏感噪声,在空冷平台装配区设置隔声樊篱。

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经由过程对典范炼油装配噪声源的阐发,石化炼制企业的噪声重点部位首要集合在泵、加热炉、空冷、紧缩机等装备,响应办法首要为隔声,其次消声,吸声和阻尼,减振等,采用顺应石化炼制企业装配特色,便于检维修和巡检。

 

 

 

Noise problem

    Petroleum & Petrochemical enterprises have wide noise sources, including the airflow noise caused by the sudden gas pressure change of such as compressed air, high-pressure steam discharged, heating furnace, catalysis “three-machine” room; the mechanical noise caused by mechanical friction, vibration, collision and high-speed rotation of such as ball grinding mill, air hammer, petroleum pump, crusher, and mechanical transmission belt; as well as the electromagnetic noise resulted from the vibration of electric device , such as transformer, caused by alternating magnetic field and impulse. 
    The noise pollution of petroleum & petrochemical enterprise is rather extensive and durable. On one hand, the complicated production technology makes noise source more extensive and influential; on the other hand, as long as the sound source does not cease, its outcome will not end and workers may be heavily annoyed and influenced by it; therefore, most of the noise produced from the production sequence in petroleum & petrochemical enterprises is of high-strength steady-state mixed noise.


Solution


    It is rather difficult to launch a comprehensive solution to address petrochemical equipment noise, but the comprehensive noise control measures, such as sound insulation, noise elimination, sound absorption, damping and vibration reduction, can be adopted in line with their operating characteristics.
    For pump: two portable sound barriers can be installed at both sides of the pump set so as to disrupt and divert the noise diffusion.
    For heating furnace: a self-viscous damping can be laid on the existing housing; then a galvanized sheet can be used to cover the damper to form a damping & sound insulation enclosure. The well sealed structure can be selected to reduce the radiation noise of combustor.
    For compressor: The compressor is a major noise source, including motor electromagnet, motor fan, coupler, so the U-shaped acoustic hood can be used at the place where makes noise.
    For noise within factory boundary: the air-cooling platform and the bottom fan are the sensitive noise sources within factory boundary; so the acoustic shields can be equipped there.
    

    Through analysis on the noise source of typical refining equipment, included in the key noise control area for the petrochemical enterprises are pump, heating furnace, air-cooling device, compressor and other equipment; the noise control measures are sound insulation, denoising, sound absorption, damping, and vibration reduction. The specific noise control measure must suit to the characteristics of petrochemical equipment to facilitate test, maintenance and inspection.