冷卻塔降噪噪聲污染源

風機低頻噪音治理：
消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)選擇(ze)(ze)非常(chang)重(zhong)要，一般消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)對中低(di)頻噪(zao)音效果不明顯，抗(kang)(kang)性(xing)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)治理(li)效果好，但頻率選擇(ze)(ze)性(xing)十分強，所以一般選擇(ze)(ze)阻(zu)抗(kang)(kang)復合(he)式消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。 阻(zu)抗(kang)(kang)復合(he)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)是(shi)指將(jiang)聲(sheng)(sheng)(sheng)(sheng)吸收和聲(sheng)(sheng)(sheng)(sheng)反射(she)恰當地組合(he)起(qi)來的消(xiao)(xiao) 聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)。它同時(shi)既有阻(zu)性(xing)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)消(xiao)(xiao)除中、高(gao)頻噪(zao)聲(sheng)(sheng)(sheng)(sheng)和抗(kang)(kang)性(xing)消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)消(xiao)(xiao)除低(di)、中頻噪(zao)聲(sheng)(sheng)(sheng)(sheng)的特性(xing)，具有寬頻帶的消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)效果。 阻(zu)抗(kang)(kang)復合(he)式消(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)器(qi)(qi)(qi)型號選擇(ze)(ze).

落水高頻噪聲治理
治(zhi)理(li)(li)(li)相對容易，但要(yao)(yao)注意隔(ge)音治(zhi)理(li)(li)(li)同時避(bi)免影響(xiang)散熱性能(neng)的(de)發(fa)揮，雖然消(xiao)(xiao)聲器和消(xiao)(xiao)聲百(bai)葉可以大幅(fu)降(jiang)噪，但要(yao)(yao)合理(li)(li)(li)設(she)計(ji)，及設(she)計(ji)時要(yao)(yao)綜合考(kao)慮(lv)散熱性能(neng)和動力(li)性能(neng)。結構不(bu)合理(li)(li)(li)就達不(bu)到(dao)降(jiang)噪目(mu) 的(de)，流阻(zu)太(tai)大會(hui)影響(xiang)冷卻塔工作，降(jiang)低制冷能(neng)力(li)：動力(li)性能(neng)設(she)計(ji)不(bu)好也會(hui)增加阻(zu)力(li)，甚至會(hui)產生混響(xiang)噪聲，所(suo)以治(zhi)理(li)(li)(li)過程中要(yao)(yao)綜合考(kao)慮(lv)。

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)、本標準(zhun)晝間、夜間的時間由(you)當地(di)人民政(zheng)府按(an)當地(di)習慣和季(ji)節變化劃定。

(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(yin)冷卻(que)塔(ta)揉合國(guo)內(nei)外先進技術配合建筑物整體造型藝術而獨創的(de)新型冷卻(que)塔(ta)，同(tong)時最大(da)限度地控(kong)制了冷卻(que)塔(ta)由于(yu)保(bao)障(zhang)熱交換而產生不(bu)可避免(mian)向大(da)氣排(pai)放的(de)飄水(shui)、噪音(yin)的(de)環境污染(ran)，它(ta)具有(you)效(xiao)率高、能耗低、組合靈(ling)活(huo)、便(bian)于(yu)維修等優點(dian)。

1、ABB戶外型全封閉三相異步電動機

采用(yong)(yong)了ABB冷卻塔(ta)專用(yong)(yong)電機(ji)，該(gai)電機(ji)是為冷卻塔(ta)工作環境(jing)下的(de)特(te)殊(shu)要求而專門(men)設計，雙密(mi)封防水汽，方便更換、拆卸、維修，無故障(zhang)運行時間長，具有效率高，防護等級(ji)高（IP55），絕緣等級(ji)高（F級(ji)）等特(te)點，能在冷卻塔(ta)濕熱(re)環境(jing)條(tiao)件下長期連續(xu)低能耗運行(正常使(shi)用(yong)(yong)壽(shou)命不小于20年)。

2、超低轉速大風量風機

冷(leng)卻塔(ta)噪(zao)音(yin)主要(yao)(yao)由風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)產生，風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)噪(zao)音(yin)是由于通(tong)過(guo)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)的(de)渦(wo)流旋渦(wo)脈動(dong)和風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)葉(xie)(xie)片及(ji)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)導(dao)流設備共同作用(yong)而產生的(de)，主要(yao)(yao)來自(zi)渦(wo)流邊界層(ceng)及(ji)尾跡。風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)葉(xie)(xie)片葉(xie)(xie)尖(jian)(jian)氣(qi)流速(su)度(du)決定了風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)噪(zao)音(yin)大(da)小，風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)旋轉噪(zao)聲(sheng)與葉(xie)(xie)尖(jian)(jian)速(su)度(du)的(de)十(shi)次方(fang)成(cheng)正(zheng)比，渦(wo)流噪(zao)聲(sheng)與葉(xie)(xie)尖(jian)(jian)速(su)度(du)的(de)六次方(fang)成(cheng)正(zheng)比。因(yin)(yin)此降(jiang)低(di)噪(zao)音(yin)主要(yao)(yao)降(jiang)低(di)葉(xie)(xie)片葉(xie)(xie)尖(jian)(jian)的(de)氣(qi)流速(su)度(du)。超靜音(yin)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)葉(xie)(xie)片采用(yong)航(hang)空(kong)鋁(lv)合金板材，可(ke)進行無級調(diao)節角度(du)。因(yin)(yin)風(feng)(feng)(feng)(feng)(feng)機(ji)(ji)設計為寬葉(xie)(xie)葉(xie)(xie)片，低(di)轉速(su)運行時具有(you)風(feng)(feng)(feng)(feng)(feng)量大(da)、全壓(ya)高、效(xiao)率高、噪(zao)音(yin)低(di)、傳動(dong)平穩(wen)等優點。而且其氣(qi)動(dong)性能(neng)好(hao)、高強(qiang)度(du)、耐(nai)腐蝕，并可(ke)通(tong)過(guo)改變葉(xie)(xie)片安放(fang)角度(du)方(fang)法滿足工藝(yi)要(yao)(yao)求及(ji)提高裝置(zhi)效(xiao)率。

3、超靜音重力噴頭

采用(yong)重力自然池(chi)式布(bu)(bu)水(shui)(shui)(shui)(shui)(shui)，配(pei)水(shui)(shui)(shui)(shui)(shui)池(chi)水(shui)(shui)(shui)(shui)(shui)平(ping)，孔口(kou)光滑，積水(shui)(shui)(shui)(shui)(shui)深度為200mm。選用(yong)口(kou)徑較大的橫流塔專(zhuan)門布(bu)(bu)水(shui)(shui)(shui)(shui)(shui)噴頭，低水(shui)(shui)(shui)(shui)(shui)壓設(she)計(ji)（20mmH2O），其優點是防(fang)止(zhi)堵塞、布(bu)(bu)水(shui)(shui)(shui)(shui)(shui)均(jun)勻(yun)，另外(wai)播(bo)水(shui)(shui)(shui)(shui)(shui)盆上(shang)加設(she)盆蓋，有(you)效地(di)防(fang)止(zhi)雜物進入冷卻水(shui)(shui)(shui)(shui)(shui)系統(tong)造成水(shui)(shui)(shui)(shui)(shui)污染，有(you)效避(bi)免頻(pin)繁清洗布(bu)(bu)水(shui)(shui)(shui)(shui)(shui)盤的麻煩(fan)，同時減(jian)少布(bu)(bu)水(shui)(shui)(shui)(shui)(shui)噪音(yin)向外(wai)傳播(bo)。

4、超靜音玻璃鋼消聲器

產品為內(nei)置空腔(qiang)吸音裝置結(jie)構，外(wai)嵌(qian)微孔消(xiao)音板，出風流暢、降噪(zao)能力(li)很(hen)強，能有效地抑制低頻噪(zao)聲對(dui)聲環境質量造成的影響。

5、超靜音消聲百葉

外(wai)觀(guan)亮麗漂(piao)亮，產品(pin)結(jie)構為百(bai)葉內(nei)設(she)空腔結(jie)構，外(wai)嵌(qian)微孔消音板，內(nei)置(zhi)吸(xi)音裝置(zhi)。有效地降(jiang)低(di)播(bo)淋水聲和低(di)頻噪聲對聲環境質量造成的(de)影(ying)響。

6、超靜音懸浮動力系統

全懸(xuan)浮式動力(li)系統設計(ji)，有(you)效地抑制(zhi)和降低冷卻塔運行時所(suo)產生的震動通(tong)過結(jie)構傳遞(di)的方式對周邊設施(shi)或(huo)建筑物造成聲(sheng)質量環境(jing)的影響。

7、消聲收水填料

采用(yong)(yong)薄(bo)膜式填(tian)(tian)料(liao)(liao)(liao)，薄(bo)膜式阻燃(ran)型淋水填(tian)(tian)料(liao)(liao)(liao)散熱面積大，熱力(li)(li)性能(neng)(neng)高，集(ji)導風、散熱、收水功(gong)能(neng)(neng)于(yu)(yu)(yu)一體(ti)。該(gai)填(tian)(tian)料(liao)(liao)(liao)采用(yong)(yong)真空吸塑而(er)成，整張懸掛式安裝(zhuang)，填(tian)(tian)料(liao)(liao)(liao)自動定位，無(wu)需膠水粘結(jie)，方便(bian)安裝(zhuang)、拆(chai)卸、清(qing)洗而(er)不至于(yu)(yu)(yu)破壞填(tian)(tian)料(liao)(liao)(liao)，同時(shi)也完全(quan)解(jie)決(jue)了(le)填(tian)(tian)料(liao)(liao)(liao)因膠水粘結(jie)而(er)易變脆的缺點，從而(er)延長(chang)使(shi)用(yong)(yong)壽命(ming)（填(tian)(tian)料(liao)(liao)(liao)正常使(shi)用(yong)(yong)壽命(ming)大于(yu)(yu)(yu)15年）； 特菱超靜音冷(leng)卻塔(ta)填(tian)(tian)料(liao)(liao)(liao)PVC片材為全(quan)新料(liao)(liao)(liao)，具有非常強(qiang)的抗寒(han)凍(dong)性能(neng)(neng)，優(you)越的親水性，熱力(li)(li)性能(neng)(neng)和抗腐蝕能(neng)(neng)力(li)(li)。填(tian)(tian)料(liao)(liao)(liao)片為難(nan)燃(ran)型材料(liao)(liao)(liao)，氧指數高達(da)34.2，達(da)到國家B1級難(nan)燃(ran)標(biao)準，優(you)于(yu)(yu)(yu)B2級標(biao)準，在65℃水溫(wen)中72小(xiao)時(shi)不發生變形現象，經過實踐(jian)運行證明，該(gai)填(tian)(tian)料(liao)(liao)(liao)能(neng)(neng)長(chang)期(qi)在50℃環(huan)境(jing)中運行。

8、進口軸承減速器

減速器軸承為日本NSK高(gao)精度軸承，傳動皮(pi)(pi)(pi)帶(dai)為日本"三(san)(san)星(xing)"（MITSUBOSHI）優質防(fang)(fang)水(shui)、防(fang)(fang)滑三(san)(san)角皮(pi)(pi)(pi)帶(dai)，槽輪(lun)與皮(pi)(pi)(pi)帶(dai)經動靜平衡測試(shi)，符合穩定運(yun)轉(zhuan)要求(qiu)。

冷卻塔降噪方法

1．加裝排風消聲器：
在(zai)冷(leng)卻(que)(que)塔(ta)(ta)的(de)出(chu)(chu)風(feng)(feng)(feng)口加裝一(yi)套阻抗復合式排風(feng)(feng)(feng)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)吸(xi)收排風(feng)(feng)(feng)氣流(liu)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)。消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)設計根據軸流(liu)風(feng)(feng)(feng)機(ji)(ji)的(de)風(feng)(feng)(feng)量、風(feng)(feng)(feng)壓大小與(yu)出(chu)(chu)風(feng)(feng)(feng)口的(de)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)頻率(lv)特(te)性來考慮，并控制通過消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)內的(de)流(liu)速。消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)一(yi)般(ban)由 隔聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)外殼、導流(liu)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)片等組成。排風(feng)(feng)(feng)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)與(yu)冷(leng)卻(que)(que)塔(ta)(ta)排風(feng)(feng)(feng)口采(cai)用(yong)導風(feng)(feng)(feng)筒(tong)連接。排風(feng)(feng)(feng)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)外殼用(yong)50厚(hou)彩(cai)鋼(gang)夾芯(xin)板(ban)(ban)拼裝，消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)插(cha)片用(yong)80mm厚(hou)防潮離心(xin)玻璃棉作為(wei)吸(xi)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)層(ceng)，用(yong)憎水(shui)玻纖(xian)布包(bao)覆， 有效的(de)降低出(chu)(chu)風(feng)(feng)(feng)口的(de)噪聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，同(tong)時(shi)也不影響冷(leng)卻(que)(que)塔(ta)(ta)風(feng)(feng)(feng)機(ji)(ji)的(de)正常運(yun)行。消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)片飾(shi)面層(ceng)為(wei)0.8mm厚(hou)鋁合金穿(chuan)孔板(ban)(ban)，穿(chuan)孔率(lv)大于30%，輕(qing)鋼(gang)龍骨結構。消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)插(cha)片為(wei)活絡結構，可(ke)以(yi)從(cong)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)中抽出(chu)(chu)，以(yi)便(bian)檢 修(xiu)冷(leng)卻(que)(que)塔(ta)(ta)風(feng)(feng)(feng)機(ji)(ji)和(he)電機(ji)(ji)。在(zai)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)過渡(du)管區開(kai)設維(wei)(wei)修(xiu)孔門, 維(wei)(wei)修(xiu)人員從(cong)兩側扶梯上到冷(leng)卻(que)(que)塔(ta)(ta)上面進(jin)行維(wei)(wei)修(xiu)。排風(feng)(feng)(feng)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)的(de)尺寸為(wei)長(chang)4.6米(mi)(mi)*寬2.5米(mi)(mi)*高(gao)1.0米(mi)(mi)，排風(feng)(feng)(feng)導風(feng)(feng)(feng)筒(tong)的(de)尺寸為(wei)長(chang)4.6米(mi)(mi)*寬2.5米(mi)(mi) *高(gao)1.6米(mi)(mi)。排風(feng)(feng)(feng)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)型(xing)鋼(gang)安裝支(zhi)架與(yu)原有冷(leng)卻(que)(que)塔(ta)(ta)脫開(kai)，自成體系，避(bi)免(mian)產生共振現象。因冷(leng)卻(que)(que)塔(ta)(ta)出(chu)(chu)風(feng)(feng)(feng)口處(chu)工況較(jiao)復雜，特(te)別是水(shui)霧嚴(yan)重，消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)插(cha)片飾(shi)面層(ceng)如采(cai)用(yong)鍍鋅穿(chuan)孔鋼(gang)板(ban)(ban)，長(chang)期(qi)在(zai)潮濕環(huan) 境下(xia)工作，容易銹蝕。為(wei)避(bi)免(mian)出(chu)(chu)現此類問題，延長(chang)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)使用(yong)年限，故消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)片護面采(cai)用(yong)0.8mm厚(hou)穿(chuan)孔鋁合金板(ban)(ban)。選用(yong)消(xiao)(xiao)(xiao)(xiao)低頻型(xing)消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)，消(xiao)(xiao)(xiao)(xiao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)器(qi)性能需滿足下(xia)表：

2. 加裝隔聲屏：
聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)在傳播過程中(zhong)遇到障(zhang)(zhang)礙時(shi)(shi)，就會(hui)發生反(fan)射、透(tou)射和繞射三種現象。聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)障(zhang)(zhang)就是在聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源與受(shou)(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點之間插入一(yi)個設施，用(yong)以(yi)隔(ge)斷(duan)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源到達(da)受(shou)(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點的(de)(de)直達(da)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)，使部分(fen)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)受(shou)(shou)阻反(fan)射，部分(fen)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)則(ze)經吸收衰減(jian)后，通(tong)過屏(ping)體透(tou)射（極(ji)小）和屏(ping)頂(ding)繞射等附(fu)加(jia)衰減(jian)形(xing)式到達(da)受(shou)(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點，達(da)到減(jian)輕(qing)(qing)受(shou)(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點的(de)(de)噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)影(ying)響、取(qu)得降(jiang)(jiang)噪(zao)效(xiao)果的(de)(de)目(mu)的(de)(de)。屏(ping)障(zhang)(zhang)的(de)(de)高(gao)度(du)及寬度(du)原則(ze)上以(yi)隔(ge)斷(duan)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)源到達(da)受(shou)(shou)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)點的(de)(de)直達(da)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)波(bo)為(wei)(wei)最(zui)低(di)(di)限度(du)，一(yi)般(ban)來(lai)說，為(wei)(wei)提高(gao)屏(ping)蔽效(xiao)果，隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)的(de)(de)高(gao)度(du)通(tong)常(chang)不低(di)(di)于進(jin)(jin)風(feng)口高(gao)度(du)的(de)(de)1.3倍；為(wei)(wei)避免影(ying)響進(jin)(jin)風(feng)，屏(ping)障(zhang)(zhang)離進(jin)(jin)風(feng)口距離通(tong)常(chang)不小于進(jin)(jin)風(feng)口高(gao)度(du)的(de)(de)2倍。 為(wei)(wei)節省投資，同時(shi)(shi)達(da)到降(jiang)(jiang)噪(zao)效(xiao)果的(de)(de)最(zui)大(da)化，在冷卻塔四周的(de)(de)其中(zhong)三面加(jia)裝依附(fu)獨(du)立鋼(gang)(gang)架做成如圖所示形(xing)狀的(de)(de)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)障(zhang)(zhang)控制落水噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)及進(jin)(jin)風(feng)口泄漏噪(zao)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)，隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)障(zhang)(zhang)構造為(wei)(wei)外側安裝具有隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)、防水，輕(qing)(qing)型的(de)(de)夾(jia)芯彩鋼(gang)(gang)板，內(nei)側為(wei)(wei)穿(chuan)孔(kong)(kong)(kong)鋁合金板。穿(chuan)孔(kong)(kong)(kong)板的(de)(de)參數為(wei)(wei)：板厚(hou) 0.8mm，孔(kong)(kong)(kong)直徑5mm，穿(chuan)孔(kong)(kong)(kong)率 30％(穿(chuan)孔(kong)(kong)(kong)率過低(di)(di)會(hui)降(jiang)(jiang)低(di)(di)隔(ge)聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)屏(ping)的(de)(de)降(jiang)(jiang)噪(zao)作(zuo)用(yong)，一(yi)般(ban)都(dou)設計在 28％至 35％)，后置吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)腔，彩鋼(gang)(gang)夾(jia)芯板厚(hou)度(du)為(wei)(wei) 50mm，在彩鋼(gang)(gang)夾(jia)芯板內(nei)側加(jia)吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)構件厚(hou) 50mm，內(nei)填高(gao)效(xiao)吸聲(sheng)(sheng)(sheng)(sheng)(sheng)(sheng)玻璃棉。采用(yong) H 型鋼(gang)(gang)或方管作(zuo)為(wei)(wei)支(zhi)撐(cheng)結構，將屏(ping)障(zhang)(zhang)插入支(zhi)撐(cheng)結構中(zhong)。

冷卻塔降噪工程

沈陽某高(gao)檔住宅小區采(cai)用集中供冷(leng)方(fang)式(shi)，將(jiang)2臺方(fang)形逆流(liu)式(shi)冷(leng)卻(que)塔安裝(zhuang)在14幢居民(min)樓(lou)前的空地上。經(jing)測試，平(ping)均(jun)噪聲(sheng)量(liang)高(gao)達68分貝，超(chao)過了環境噪聲(sheng)標準的規定(ding)。居民(min)強烈要求(qiu)治理冷(leng)卻(que)塔的噪聲(sheng)污(wu)染。

噪(zao)(zao)聲(sheng)(sheng)(sheng)源分析： 冷卻塔的噪(zao)(zao)聲(sheng)(sheng)(sheng)源主要包(bao)括風(feng)機的空氣(qi)動力噪(zao)(zao)聲(sheng)(sheng)(sheng)、機械(xie)噪(zao)(zao)聲(sheng)(sheng)(sheng)和落(luo)水噪(zao)(zao)聲(sheng)(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(luo)水(shui)噪(zao)聲用玻璃棉材料吸收。

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(ti)性(xing)噪聲(sheng)(sheng)，就(jiu)要對噪聲(sheng)(sheng)源設(she)備實施減振(zhen)。通(tong)過減振(zhen)可有效(xiao)降(jiang)低低頻噪聲(sheng)(sheng)根據噪聲(sheng)(sheng)源的不同，但降(jiang)噪效(xiao)果(guo)不佳