最正规的棋牌游戏平台

冷却塔隔声降噪

冷却塔隔声降噪

冷却塔降噪噪声污染源

风机低频噪音治理:
消声器选择非常重要,一般消声器对中低频噪音效果不明显,抗性消声器治理效果好,但频率选择性十分强,所以一般选择阻抗复合式消声器。 阻抗复合消声器是指将声吸收和声反射恰当地组合起来的消 声器。它同时既有阻性消声器消除中、高频噪声和抗性消声器消除低、中频噪声的特性,具有宽频带的消声效果。 阻抗复合式消声器型号选择.

落水高频噪声治理
治理相对容易,但要注意隔音治理同时避免影响散热性能的发挥,虽然消声器和消声百叶可以大幅降噪,但要合理设计,及设计时要综合考虑散热性能和动力性能。结构不合理就达不到降噪目 的,流阻太大会影响冷却塔工作,降低制冷能力:动力性能设计不好也会增加阻力,甚至会产生混响噪声,所以治理过程中要综合考虑。

冷却塔降噪标准

《中华人民共和国环境保护法》及《中华人民共和国环境噪声污染防治条例》,保障城市居民的生活声环境质量,我国制订了《社会生活环境噪声排放标准 GB22337-2008》。
1、城市区域环境噪声标准限值见表:
2、夜间突发的噪声,其最大值不准超过标准值15dB。
3、区域及时间的划定:
(1)、各类标准适用区域由当地人民政府划定。
(2)、本标准昼间、夜间的时间由当地人民政府按当地习惯和季节变化划定。

(时段) 边界外声环境功能区 昼间 夜间
0 50 40
1 55 45
2 60 50
3 65 55
4 70 55

冷却塔降噪优势

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1、ABB户外型全封闭三相异步电动机

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2、超低转速大风量风机

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3、超静音重力喷头

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4、超静音玻璃钢消声器

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5、超静音消声百叶

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6、超静音悬浮动力系统

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7、消声收水填料

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8、进口轴承减速器

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冷却塔降噪方法

1.加装排风消声器:
在冷却塔的出风口加装一套阻抗复合式排风消声器吸收排风气流噪声。消声器设计根据轴流风机的风量、风压大小与出风口的噪声频率特性来考虑,并控制通过消声器内的流速。消声器一般由 隔声吸声外壳、导流消声片等组成。排风消声器与冷却塔排风口采用导风筒连接。排风消声器外壳用50厚彩钢夹芯板拼装,消声插片用80mm厚防潮离心玻璃棉作为吸声层,用憎水玻纤布包覆, 有效的降低出风口的噪声,同时也不影响冷却塔风机的正常运行。消声片饰面层为0.8mm厚铝合金穿孔板,穿孔率大于30%,轻钢龙骨结构。消声插片为活络结构,可以从消声器中抽出,以便检 修冷却塔风机和电机。在消声器过渡管区开设维修孔门, 维修人员从两侧扶梯上到冷却塔上面进行维修。排风消声器的尺寸为长4.6米*宽2.5米*高1.0米,排风导风筒的尺寸为长4.6米*宽2.5米 *高1.6米。排风消声器型钢安装支架与原有冷却塔脱开,自成体系,避免产生共振现象。因冷却塔出风口处工况较复杂,特别是水雾严重,消声插片饰面层如采用镀锌穿孔钢板,长期在潮湿环 境下工作,容易锈蚀。为避免出现此类问题,延长消声器使用年限,故消声片护面采用0.8mm厚穿孔铝合金板。选用消低频型消声器,消声器性能需满足下表:

2. 加装隔声屏:
声波在传播过程中遇到障碍时,就会发生反射、透射和绕射三种现象。声屏障就是在声源与受声点之间插入一个设施,用以隔断声源到达受声点的直达声波,使部分声波受阻反射,部分声波则经吸收衰减后,通过屏体透射(极小)和屏顶绕射等附加衰减形式到达受声点,达到减轻受声点的噪声影响、取得降噪效果的目的。屏障的高度及宽度原则上以隔断声源到达受声点的直达声波为最低限度,一般来说,为提高屏蔽效果,隔声屏的高度通常不低于进风口高度的1.3倍;为避免影响进风,屏障离进风口距离通常不小于进风口高度的2倍。 为节省投资,同时达到降噪效果的最大化,在冷却塔四周的其中三面加装依附独立钢架做成如图所示形状的隔声屏障控制落水噪声及进风口泄漏噪声,隔声屏障构造为外侧安装具有隔声、防水,轻型的夹芯彩钢板,内侧为穿孔铝合金板。穿孔板的参数为:板厚 0.8mm,孔直径5mm,穿孔率 30%(穿孔率过低会降低隔声屏的降噪作用,一般都设计在 28%至 35%),后置吸声腔,彩钢夹芯板厚度为 50mm,在彩钢夹芯板内侧加吸声构件厚 50mm,内填高效吸声玻璃棉。采用 H 型钢或方管作为支撑结构,将屏障插入支撑结构中。

冷却塔降噪工程

SHENYANGMOUGAODANGZHUZHAIXIAOQUCAIYONGJIZHONGGONGLENGFANGSHI,JIANG2TAIFANGXINGNILIUSHILENGQUETAANZHUANGZAI14CHUANGJUMINLOUQIANDEKONGDISHANG。JINGCESHI,PINGJUNZAOSHENGLIANGGAODA68FENBEI,CHAOGUOLEHUANJINGZAOSHENGBIAOZHUNDEGUIDING。JUMINQIANGLIEYAOQIUZHILILENGQUETADEZAOSHENGWURAN。

ZAOSHENGYUANFENXI: LENGQUETADEZAOSHENGYUANZHUYAOBAOKUOFENGJIDEKONGQIDONGLIZAOSHENG、JIXIEZAOSHENGHELUOSHUIZAOSHENG。

冷却塔降噪方案:
1、在风机出风口设置阻性消声器,有效阻止噪声传播。
2、为保证冷却塔的散热,设置组合式声屏障来阻止下部噪声传播。
3、为有效减少噪声,在冷却塔底部设置吸隔声组合式声屏障吸收噪声。
4、在冷却塔中部设置阻尼隔声板和吸声材料,提高吸声效果。
5、落水噪声用玻璃棉材料吸收。

如果噪声源大可用隔声屏,噪声可分为空气性噪声和固体性噪声。

空气性噪声,如果噪声源小可设隔声罩,消声器,降噪效果明显。总之在传播途径中考虑降噪。

最正规的棋牌游戏平台固体性噪声,就要对噪声源设备实施减振。通过减振可有效降低低频噪声根据噪声源的不同,但降噪效果不佳

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