最正规的棋牌游戏平台

冷却塔隔音降噪步骤

冷却塔隔音降噪步骤

冷却塔降噪噪声分析

冷却塔的噪声由如下几部分组成:
风机进、排风噪声;
淋水噪声;
风机减速器和电动机噪声;
冷却塔水泵、配管和阀门噪声。
其中,主要是由淋水噪声和轴流风机排风噪声对周围环境造成影响。 轴流风机排风噪声主要是空气动力性噪声。它包括旋转噪声和涡流噪声。旋转噪声是由于风机的叶轮旋转与空气质点相互作用引起空气脉动而产生的,噪声的强度与风机的叶片数,叶片形状、尺寸,风机叶轮的转速,风机内风速及流量,静压等因素有关,噪声频率呈窄带的低、中频性,涡流噪声则是由于气体在风机叶轮的界面上分裂时,气体的粘性形成一系列涡流产生的,涡流噪声的频率取决于风机叶片的形状,叶片和气体的相对速度。经频谱分析,其噪声呈明显的低、中频特性,这类噪声传播距离远,对环境及人的干扰很大, 而噪声呈明显的中、高频特性。 循环热水从淋水装置下落时与塔底接水盘中的积水撞击产生的淋水声属高频噪声,淋水声的大小与淋水高度和单位时间的水流量有关。 冷却塔整体噪声为以低频为主的连续谱,没有突出的噪声峰值,一般在31.5-2000Hz之间,噪声级约为70-75dB(A)。下表为实测噪声值。

冷却塔降噪方法

声导流片法(消声弯头)
  消声导流片法及特点在冷却塔进风口安装消声导流片,通过消声导流片的消声作用,来减少冷却塔噪声对外界的影响 ,也称为消声器法。理论及试验表明其降噪量可以达到35dB(A),甚至更高;在降噪量15—2OdB(A)时,与声屏障造价相当,在20dB(A)以上降噪量时是唯一可选方案;结构紧凑,不占建筑物额外场地,基本无须维护 。

消声导流片法(消声弯头)
最正规的棋牌游戏平台   隔声屏障一般设计为距冷却塔进风口的距离大于冷却塔进风口高度,屏障高度等于屏障到进风口的距离。降噪效果一般在10-15dB(A),理论上降噪量可2OdB(A)左右,但存在着声波绕射问题,在声影区范围内降噪量较好,绕射区和声亮区降噪效果较差,因此实际工程上很难将其影响区内噪声降低20dB(A);对通风影响不大,维护比较简单;建设声屏障的技术要求不高,但对结构要求相当高,并且投资成本随着高度的增加成倍增加;

冷却塔降噪控制方案

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冷却塔的结构组成及功能

结构 功能
支架和塔体 外部支撑
填料 为水和空气提供尽可能大的换热面积
冷却水槽 位于冷却塔底部,接收冷却水
收水器 回收空气流带走的水滴
进风口 冷却塔空气入口
百叶窗 平均进气气流,保留塔内水分
淋水装置 将冷却水喷出
风机 向冷却塔内送风
轴流风扇 用于诱导通风冷却塔
轴流/离心风扇 用于强制通风冷却塔

冷却塔降噪方法

最正规的棋牌游戏平台SHANGCHANGXIEZILOUHUOZHEZHUZHAIDELENGQUETACHANGCHANGYINWEIZAOSHENGWENTIDARAODAOJUMIN,TEBIESHISHENYERENMENXUYAOXIUXIDESHIHOU,LENGQUETAZAOSHENGYIRANCHUANGUOCHUANGHUJINRUSHINEI。NEIMERUHEJIANGDILENGQUETAZAOSHENG,BINGQIEJIANGQIKONGZHIDAORENMENKEYIJIESHOUDEFANWEINI?

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在设计降噪设备时,我们需要了解冷却塔的噪声来源,冷却塔主要靠机械通风冷却循环热水。用泵将循环热水送到水分布器喷出,水沿着填料下淋落到水池。由风机将冷空气引入与下淋的热水接触,进行热交换,将水冷却。冷却塔的噪声源由以下几部分组成:
(1)风机进排气噪声(主要噪声源);
(2)淋水噪声(次要噪声源);
(3)风机减速器和电动机噪声;
(4)冷却塔水泵、配管和阀门噪声;
最正规的棋牌游戏平台 其中,主要是风机运行进排气噪声和淋水噪声,风机通过进排气口和塔体向外辐射噪声。

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最正规的棋牌游戏平台CHULELENGQUETAGESHENGPINGZHANGYIWAI,HAIKEYISHIYONGXIAOSHENGDAOLIUPIANJINXINGLENGQUETAJIANGZAO,YIBANANZHUANGZAILENGQUETACHUFENGKOU,ZAIBUYINGXIANGLENGQUETACHUFENGYASUNDEQIANTIXIA,KEYISHIXIANXIAOSHENG10FENBEIDEGEYINMUBIAO。

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