冷卻塔降噪噪聲污染源

風機低頻噪音治理：
消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)選(xuan)擇(ze)(ze)(ze)非常重(zhong)要(yao)，一(yi)般消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)對中低頻(pin)噪音效(xiao)果(guo)(guo)不明顯，抗(kang)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)治理效(xiao)果(guo)(guo)好，但頻(pin)率選(xuan)擇(ze)(ze)(ze)性十分強，所(suo)以一(yi)般選(xuan)擇(ze)(ze)(ze)阻(zu)抗(kang)復(fu)(fu)合式(shi)(shi)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。 阻(zu)抗(kang)復(fu)(fu)合消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)是指(zhi)將聲(sheng)(sheng)(sheng)(sheng)(sheng)吸收和(he)聲(sheng)(sheng)(sheng)(sheng)(sheng)反射恰當(dang)地組合起(qi)來的消(xiao)(xiao)(xiao)(xiao)(xiao) 聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。它同(tong)時(shi)既(ji)有阻(zu)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)消(xiao)(xiao)(xiao)(xiao)(xiao)除(chu)(chu)中、高頻(pin)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)和(he)抗(kang)性消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)消(xiao)(xiao)(xiao)(xiao)(xiao)除(chu)(chu)低、中頻(pin)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)的特性，具有寬(kuan)頻(pin)帶的消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)效(xiao)果(guo)(guo)。 阻(zu)抗(kang)復(fu)(fu)合式(shi)(shi)消(xiao)(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)型號選(xuan)擇(ze)(ze)(ze).

落水高頻噪聲治理
治理相對(dui)容易，但要(yao)注(zhu)意(yi)隔音治理同時避免影響(xiang)散(san)熱性(xing)能(neng)(neng)的(de)(de)發揮，雖然消(xiao)聲(sheng)(sheng)器和(he)消(xiao)聲(sheng)(sheng)百葉可以(yi)大幅降(jiang)噪，但要(yao)合(he)(he)理設(she)(she)計，及設(she)(she)計時要(yao)綜合(he)(he)考慮散(san)熱性(xing)能(neng)(neng)和(he)動力性(xing)能(neng)(neng)。結構不(bu)(bu)合(he)(he)理就達不(bu)(bu)到降(jiang)噪目 的(de)(de)，流阻太大會影響(xiang)冷卻塔工作(zuo)，降(jiang)低制(zhi)冷能(neng)(neng)力：動力性(xing)能(neng)(neng)設(she)(she)計不(bu)(bu)好(hao)也會增(zeng)加阻力，甚至會產生混(hun)響(xiang)噪聲(sheng)(sheng)，所以(yi)治理過程中要(yao)綜合(he)(he)考慮。

冷卻塔降噪標準

《中華人民共和國環境保護法》及《中華人民共和國環境噪聲污染防治條例》，保障城市居民的生活聲環境質量，我國制訂了《社會生活環境噪聲排放標準 GB22337-2008》。
1、城市區域環境噪聲標準限值見表：
2、夜間突發的噪聲，其最大值不準超過標準值15dB。
3、區域及時間的劃定：
(1)、各類標準適用區域由當地人民政府劃定。
(2)、本(ben)標準晝(zhou)間(jian)、夜(ye)間(jian)的時(shi)間(jian)由當地人(ren)民政(zheng)府(fu)按當地習(xi)慣和季節(jie)變化(hua)劃定。

(時段) 邊界外聲環境功能區	晝間	夜間
0	50	40
1	55	45
2	60	50
3	65	55
4	70	55

冷卻塔降噪優勢

特菱(ling)超靜音冷(leng)(leng)卻(que)塔(ta)(ta)揉合(he)國內外先進技(ji)術(shu)配(pei)合(he)建筑(zhu)物(wu)整體造型藝術(shu)而獨(du)創的(de)新(xin)型冷(leng)(leng)卻(que)塔(ta)(ta)，同(tong)時最大(da)限度地控制了冷(leng)(leng)卻(que)塔(ta)(ta)由(you)于(yu)保障熱交換而產生不(bu)可避免向大(da)氣排放(fang)的(de)飄水、噪音的(de)環境污染，它具有效率高(gao)、能(neng)耗低(di)、組合(he)靈活、便(bian)于(yu)維修(xiu)等優點。

1、ABB戶外型全封閉三相異步電動機

采用了ABB冷(leng)卻塔專用電機，該電機是(shi)為冷(leng)卻塔工作環(huan)境下(xia)的特殊要求(qiu)而專門設計，雙密(mi)封(feng)防水(shui)汽，方便更換(huan)、拆卸、維修，無(wu)故障運(yun)行(xing)時間長，具有效率高，防護等(deng)級高（IP55），絕(jue)緣等(deng)級高（F級）等(deng)特點，能在(zai)冷(leng)卻塔濕(shi)熱環(huan)境條(tiao)件下(xia)長期連續低能耗運(yun)行(xing)(正常使用壽(shou)命(ming)不小于20年(nian))。

2、超低轉速大風量風機

冷卻塔噪音主(zhu)(zhu)要(yao)(yao)由風(feng)(feng)(feng)機產生，風(feng)(feng)(feng)機噪音是(shi)由于通(tong)過(guo)風(feng)(feng)(feng)機的(de)渦(wo)(wo)流旋渦(wo)(wo)脈動(dong)(dong)和(he)風(feng)(feng)(feng)機葉(xie)(xie)(xie)片及(ji)風(feng)(feng)(feng)機導流設備共同作用而產生的(de)，主(zhu)(zhu)要(yao)(yao)來(lai)自渦(wo)(wo)流邊界層及(ji)尾跡。風(feng)(feng)(feng)機葉(xie)(xie)(xie)片葉(xie)(xie)(xie)尖氣(qi)流速(su)度(du)決定(ding)了風(feng)(feng)(feng)機噪音大小(xiao)，風(feng)(feng)(feng)機旋轉(zhuan)噪聲與葉(xie)(xie)(xie)尖速(su)度(du)的(de)十次方(fang)(fang)成正(zheng)比，渦(wo)(wo)流噪聲與葉(xie)(xie)(xie)尖速(su)度(du)的(de)六次方(fang)(fang)成正(zheng)比。因(yin)此(ci)降低(di)(di)噪音主(zhu)(zhu)要(yao)(yao)降低(di)(di)葉(xie)(xie)(xie)片葉(xie)(xie)(xie)尖的(de)氣(qi)流速(su)度(du)。超(chao)靜(jing)音風(feng)(feng)(feng)機葉(xie)(xie)(xie)片采用航空鋁合金板材，可進行無級調節角(jiao)度(du)。因(yin)風(feng)(feng)(feng)機設計為寬(kuan)葉(xie)(xie)(xie)葉(xie)(xie)(xie)片，低(di)(di)轉(zhuan)速(su)運行時(shi)具有(you)風(feng)(feng)(feng)量大、全壓(ya)高、效率高、噪音低(di)(di)、傳(chuan)動(dong)(dong)平穩(wen)等優點(dian)。而且其氣(qi)動(dong)(dong)性能好(hao)、高強(qiang)度(du)、耐腐蝕，并可通(tong)過(guo)改變葉(xie)(xie)(xie)片安放角(jiao)度(du)方(fang)(fang)法(fa)滿(man)足工藝要(yao)(yao)求及(ji)提高裝(zhuang)置效率。

3、超靜音重力噴頭

采用重力自然(ran)池式(shi)布(bu)水(shui)(shui)(shui)(shui)，配水(shui)(shui)(shui)(shui)池水(shui)(shui)(shui)(shui)平，孔口光滑，積水(shui)(shui)(shui)(shui)深度(du)為200mm。選用口徑較大的(de)(de)橫流塔專(zhuan)門布(bu)水(shui)(shui)(shui)(shui)噴頭，低水(shui)(shui)(shui)(shui)壓設計（20mmH2O），其優點是防止堵塞(sai)、布(bu)水(shui)(shui)(shui)(shui)均勻，另(ling)外播(bo)水(shui)(shui)(shui)(shui)盆上加設盆蓋，有效(xiao)地防止雜物進入冷(leng)卻水(shui)(shui)(shui)(shui)系統造成(cheng)水(shui)(shui)(shui)(shui)污染，有效(xiao)避免頻繁清洗布(bu)水(shui)(shui)(shui)(shui)盤的(de)(de)麻(ma)煩，同時減(jian)少布(bu)水(shui)(shui)(shui)(shui)噪音向外傳播(bo)。

4、超靜音玻璃鋼消聲器

產品為內置空腔吸音裝置結構(gou)，外嵌微孔(kong)消音板，出風流暢、降噪(zao)能力(li)很強，能有效地抑制(zhi)低頻噪(zao)聲對聲環境質量造成的影(ying)響。

5、超靜音消聲百葉

外觀亮麗漂亮，產品結構(gou)為百葉(xie)內(nei)設空(kong)腔結構(gou)，外嵌微孔消音(yin)板(ban)，內(nei)置吸(xi)音(yin)裝置。有效地(di)降(jiang)低播淋(lin)水(shui)聲和低頻噪聲對聲環(huan)境質量造成(cheng)的影響。

6、超靜音懸浮動力系統

全懸浮(fu)式動(dong)力(li)系統設(she)計，有效地抑制(zhi)和降低(di)冷卻塔運行(xing)時所產生的(de)震動(dong)通過結(jie)構傳(chuan)遞的(de)方式對周邊設(she)施(shi)或建筑(zhu)物造成聲質量(liang)環境的(de)影響。

7、消聲收水填料

采(cai)用(yong)(yong)薄膜(mo)式填(tian)(tian)(tian)料(liao)(liao)，薄膜(mo)式阻燃型(xing)淋水(shui)填(tian)(tian)(tian)料(liao)(liao)散熱面(mian)積大，熱力性(xing)(xing)能(neng)高(gao)，集導風、散熱、收水(shui)功能(neng)于(yu)(yu)一體。該填(tian)(tian)(tian)料(liao)(liao)采(cai)用(yong)(yong)真空吸塑(su)而成(cheng)，整張懸掛式安裝，填(tian)(tian)(tian)料(liao)(liao)自(zi)動定位(wei)，無(wu)需(xu)膠水(shui)粘結(jie)(jie)，方便安裝、拆(chai)卸(xie)、清洗而不至于(yu)(yu)破壞填(tian)(tian)(tian)料(liao)(liao)，同時也完全解(jie)決了填(tian)(tian)(tian)料(liao)(liao)因(yin)膠水(shui)粘結(jie)(jie)而易(yi)變脆的(de)缺(que)點，從而延長(chang)使(shi)用(yong)(yong)壽命(ming)（填(tian)(tian)(tian)料(liao)(liao)正常使(shi)用(yong)(yong)壽命(ming)大于(yu)(yu)15年(nian)）； 特菱超(chao)靜(jing)音冷卻塔填(tian)(tian)(tian)料(liao)(liao)PVC片材為全新料(liao)(liao)，具有非常強(qiang)的(de)抗寒凍性(xing)(xing)能(neng)，優越的(de)親(qin)水(shui)性(xing)(xing)，熱力性(xing)(xing)能(neng)和抗腐蝕(shi)能(neng)力。填(tian)(tian)(tian)料(liao)(liao)片為難(nan)燃型(xing)材料(liao)(liao)，氧(yang)指(zhi)數(shu)高(gao)達34.2，達到國(guo)家B1級難(nan)燃標準(zhun)(zhun)，優于(yu)(yu)B2級標準(zhun)(zhun)，在65℃水(shui)溫中72小時不發生變形現象，經過(guo)實(shi)踐運(yun)(yun)行(xing)證明，該填(tian)(tian)(tian)料(liao)(liao)能(neng)長(chang)期在50℃環境中運(yun)(yun)行(xing)。

8、進口軸承減速器

減速器軸(zhou)承為日本(ben)NSK高精度軸(zhou)承，傳動皮(pi)帶(dai)為日本(ben)"三星"（MITSUBOSHI）優(you)質(zhi)防(fang)水、防(fang)滑三角(jiao)皮(pi)帶(dai)，槽輪與(yu)皮(pi)帶(dai)經動靜平(ping)衡測(ce)試，符合(he)穩定運轉要求。

冷卻塔降噪方法

1．加裝排風消聲器：
在(zai)(zai)冷(leng)(leng)卻(que)塔(ta)(ta)(ta)的(de)(de)(de)出(chu)風(feng)口(kou)加(jia)裝一(yi)套阻抗復合式排(pai)風(feng)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)吸(xi)收排(pai)風(feng)氣流(liu)(liu)噪聲(sheng)(sheng)(sheng)(sheng)。消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)設(she)計根(gen)據軸流(liu)(liu)風(feng)機(ji)(ji)的(de)(de)(de)風(feng)量(liang)、風(feng)壓(ya)大小與(yu)(yu)出(chu)風(feng)口(kou)的(de)(de)(de)噪聲(sheng)(sheng)(sheng)(sheng)頻率特性(xing)來考(kao)慮，并控制通過(guo)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)內的(de)(de)(de)流(liu)(liu)速。消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)一(yi)般由 隔聲(sheng)(sheng)(sheng)(sheng)吸(xi)聲(sheng)(sheng)(sheng)(sheng)外殼、導流(liu)(liu)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)片(pian)(pian)等(deng)組(zu)成。排(pai)風(feng)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)與(yu)(yu)冷(leng)(leng)卻(que)塔(ta)(ta)(ta)排(pai)風(feng)口(kou)采(cai)用(yong)(yong)導風(feng)筒(tong)(tong)連(lian)接。排(pai)風(feng)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)外殼用(yong)(yong)50厚彩鋼(gang)(gang)夾芯板(ban)拼裝，消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)插片(pian)(pian)用(yong)(yong)80mm厚防潮(chao)離(li)心玻璃(li)棉(mian)作(zuo)為吸(xi)聲(sheng)(sheng)(sheng)(sheng)層，用(yong)(yong)憎水玻纖(xian)布包覆(fu)， 有(you)效的(de)(de)(de)降(jiang)低(di)出(chu)風(feng)口(kou)的(de)(de)(de)噪聲(sheng)(sheng)(sheng)(sheng)，同時也(ye)不影響冷(leng)(leng)卻(que)塔(ta)(ta)(ta)風(feng)機(ji)(ji)的(de)(de)(de)正常運行。消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)片(pian)(pian)飾面層為0.8mm厚鋁合金(jin)(jin)穿孔(kong)(kong)板(ban)，穿孔(kong)(kong)率大于(yu)30%，輕鋼(gang)(gang)龍骨結構。消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)插片(pian)(pian)為活絡結構，可以從消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)中抽出(chu)，以便檢 修冷(leng)(leng)卻(que)塔(ta)(ta)(ta)風(feng)機(ji)(ji)和(he)電機(ji)(ji)。在(zai)(zai)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)過(guo)渡管(guan)區開設(she)維修孔(kong)(kong)門, 維修人員從兩(liang)側扶梯(ti)上到冷(leng)(leng)卻(que)塔(ta)(ta)(ta)上面進行維修。排(pai)風(feng)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)的(de)(de)(de)尺(chi)寸(cun)(cun)為長(chang)4.6米(mi)(mi)(mi)*寬2.5米(mi)(mi)(mi)*高(gao)1.0米(mi)(mi)(mi)，排(pai)風(feng)導風(feng)筒(tong)(tong)的(de)(de)(de)尺(chi)寸(cun)(cun)為長(chang)4.6米(mi)(mi)(mi)*寬2.5米(mi)(mi)(mi) *高(gao)1.6米(mi)(mi)(mi)。排(pai)風(feng)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)型(xing)鋼(gang)(gang)安(an)裝支(zhi)架與(yu)(yu)原有(you)冷(leng)(leng)卻(que)塔(ta)(ta)(ta)脫(tuo)開，自成體系，避免產生共振現象(xiang)。因冷(leng)(leng)卻(que)塔(ta)(ta)(ta)出(chu)風(feng)口(kou)處工(gong)(gong)況較復雜，特別是水霧嚴重，消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)插片(pian)(pian)飾面層如(ru)采(cai)用(yong)(yong)鍍鋅穿孔(kong)(kong)鋼(gang)(gang)板(ban)，長(chang)期在(zai)(zai)潮(chao)濕(shi)環 境下工(gong)(gong)作(zuo)，容易銹蝕。為避免出(chu)現此類問題，延(yan)長(chang)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)使用(yong)(yong)年限(xian)，故消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)片(pian)(pian)護面采(cai)用(yong)(yong)0.8mm厚穿孔(kong)(kong)鋁合金(jin)(jin)板(ban)。選(xuan)用(yong)(yong)消(xiao)(xiao)(xiao)低(di)頻型(xing)消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)，消(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)性(xing)能(neng)需(xu)滿足下表：

2. 加裝隔聲屏：
聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)(bo)(bo)在(zai)傳播過(guo)程中遇到障(zhang)(zhang)(zhang)礙時(shi)，就會發生反射、透射和繞射三種現象。聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)就是在(zai)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)與受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)之(zhi)間插(cha)入一個(ge)設施，用(yong)以隔斷聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)到達受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)的(de)(de)(de)(de)直達聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)(bo)(bo)，使部(bu)分(fen)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)(bo)(bo)受阻(zu)反射，部(bu)分(fen)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)(bo)(bo)則(ze)經(jing)吸收衰減后，通過(guo)屏(ping)(ping)(ping)體透射（極小）和屏(ping)(ping)(ping)頂繞射等附(fu)加衰減形(xing)式到達受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)，達到減輕受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)的(de)(de)(de)(de)噪(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)影響、取得(de)降噪(zao)(zao)效果(guo)的(de)(de)(de)(de)目的(de)(de)(de)(de)。屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)的(de)(de)(de)(de)高度及寬度原則(ze)上以隔斷聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源(yuan)(yuan)到達受聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點(dian)的(de)(de)(de)(de)直達聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)(bo)(bo)為(wei)最低(di)(di)(di)限(xian)度，一般來說(shuo)，為(wei)提高屏(ping)(ping)(ping)蔽效果(guo)，隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)的(de)(de)(de)(de)高度通常(chang)不低(di)(di)(di)于進(jin)風口(kou)高度的(de)(de)(de)(de)1.3倍(bei)；為(wei)避免影響進(jin)風，屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)離(li)進(jin)風口(kou)距離(li)通常(chang)不小于進(jin)風口(kou)高度的(de)(de)(de)(de)2倍(bei)。 為(wei)節省投(tou)資，同時(shi)達到降噪(zao)(zao)效果(guo)的(de)(de)(de)(de)最大(da)化，在(zai)冷(leng)卻塔四周的(de)(de)(de)(de)其中三面加裝(zhuang)依附(fu)獨立鋼(gang)(gang)架做(zuo)成如圖所示形(xing)狀(zhuang)的(de)(de)(de)(de)隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)控(kong)制落水噪(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)及進(jin)風口(kou)泄漏噪(zao)(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)構造為(wei)外(wai)側安裝(zhuang)具有隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)、防水，輕型的(de)(de)(de)(de)夾(jia)芯(xin)彩鋼(gang)(gang)板(ban)，內側為(wei)穿(chuan)(chuan)孔(kong)(kong)鋁合金板(ban)。穿(chuan)(chuan)孔(kong)(kong)板(ban)的(de)(de)(de)(de)參數(shu)為(wei)：板(ban)厚(hou)(hou) 0.8mm，孔(kong)(kong)直徑(jing)5mm，穿(chuan)(chuan)孔(kong)(kong)率 30％(穿(chuan)(chuan)孔(kong)(kong)率過(guo)低(di)(di)(di)會降低(di)(di)(di)隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)的(de)(de)(de)(de)降噪(zao)(zao)作(zuo)用(yong)，一般都設計在(zai) 28％至 35％)，后置吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)腔(qiang)，彩鋼(gang)(gang)夾(jia)芯(xin)板(ban)厚(hou)(hou)度為(wei) 50mm，在(zai)彩鋼(gang)(gang)夾(jia)芯(xin)板(ban)內側加吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)構件厚(hou)(hou) 50mm，內填(tian)高效吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)玻璃棉。采(cai)用(yong) H 型鋼(gang)(gang)或(huo)方管(guan)作(zuo)為(wei)支(zhi)撐(cheng)結構，將屏(ping)(ping)(ping)障(zhang)(zhang)(zhang)插(cha)入支(zhi)撐(cheng)結構中。

冷卻塔降噪工程

沈陽某高檔住(zhu)宅小區采用集中供冷方式，將(jiang)2臺(tai)方形逆(ni)流式冷卻塔安裝在14幢居民樓(lou)前(qian)的空地上。經測試(shi)，平(ping)均噪(zao)聲量高達68分貝(bei)，超過了(le)環境噪(zao)聲標準(zhun)的規(gui)定。居民強烈要求(qiu)治(zhi)理冷卻塔的噪(zao)聲污染。

噪(zao)聲(sheng)(sheng)源分析： 冷卻塔的噪(zao)聲(sheng)(sheng)源主要包括風(feng)機(ji)的空氣(qi)動力(li)噪(zao)聲(sheng)(sheng)、機(ji)械噪(zao)聲(sheng)(sheng)和落水噪(zao)聲(sheng)(sheng)。

冷卻塔降噪方案：
1、在風機出風口設置阻性消聲器，有效阻止噪聲傳播。
2、為保證冷卻塔的散熱，設置組合式聲屏障來阻止下部噪聲傳播。
3、為有效減少噪聲，在冷卻塔底部設置吸隔聲組合式聲屏障吸收噪聲。
4、在冷卻塔中部設置阻尼隔聲板和吸聲材料，提高吸聲效果。
5、落水噪(zao)聲用(yong)玻璃棉材料吸收。

如果噪聲源大可用隔聲屏，噪聲可分為空氣性噪聲和固體性噪聲。

空氣性噪聲，如果噪聲源小可設隔聲罩，消聲器，降噪效果明顯。總之在傳播途徑中考慮降噪。

固體性噪聲(sheng)，就要對噪聲(sheng)源設備實施減(jian)振。通過減(jian)振可有效(xiao)降低(di)低(di)頻噪聲(sheng)根(gen)據噪聲(sheng)源的不同，但(dan)降噪效(xiao)果不佳