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管殼式(shi)換熱(re)器(qi)(qi)是(shi)石油(you)化工行(xing)業的(de)(de)(de)重要(yao)(yao)設(she)備(bei),它的(de)(de)(de)腐(fu)(fu)蝕(shi)(shi)(shi)及(ji)(ji)保護對設(she)備(bei)的(de)(de)(de)長周期運行(xing)有著重要(yao)(yao)的(de)(de)(de)意(yi)義;由(you)于近年來加工原油(you)中(zhong)的(de)(de)(de)硫、酸及(ji)(ji)雜質含(han)量越來越高(gao),對煉(lian)油(you)換熱(re)設(she)備(bei)的(de)(de)(de)防(fang)腐(fu)(fu)蝕(shi)(shi)(shi)性能及(ji)(ji)材料的(de)(de)(de)選擇(ze)提(ti)出(chu)了(le)更高(gao)的(de)(de)(de)要(yao)(yao)求。文章對采用專用涂(tu)料與犧牲(sheng)陽極綜(zong)合(he)保護法進行(xing)了(le)闡(chan)述,該方法工藝方案和(he)特點是(shi):管殼式(shi)換熱(re)器(qi)(qi)的(de)(de)(de)工藝方案和(he)特點是(shi)什么表面處理要(yao)(yao)徹底,合(he)理選取(qu)保護電流(liu)密度(du),按(an)(an)設(she)計要(yao)(yao)求確定陽極塊,控制好濕度(du)和(he)溫度(du),涂(tu)料施工嚴格按(an)(an)照SHY-99涂(tu)料工藝進行(xing),確保綜(zong)合(he)防(fang)護的(de)(de)(de)效果(guo)。目前國內石油(you)、化纖、冶金、發電等企業的(de)(de)(de)冷(leng)換器(qi)(qi)設(she)備(bei)經常由(you)于水垢、腐(fu)(fu)蝕(shi)(shi)(shi)產物和(he)腐(fu)(fu)蝕(shi)(shi)(shi)物黏(nian)泥造成冷(leng)換器(qi)(qi)堵塞,致傳熱(re)系數(shu)下降,是(shi)冷(leng)卻水系統(tong)中(zhong)常見的(de)(de)(de)問題。由(you)于碳酸鹽垢的(de)(de)(de)導熱(re)系數(shu)只(zhi)有碳鋼的(de)(de)(de)1%左(zuo)右,直接影響到了(le)換熱(re)效率,增加了(le)系統(tong)的(de)(de)(de)壓(ya)力降。
管(guan)(guan)(guan)(guan)(guan)(guan)(guan)殼(ke)(ke)式(shi)(shi)換(huan)熱(re)器(qi)(qi)(shell and tube heat exchanger)又稱(cheng)列管(guan)(guan)(guan)(guan)(guan)(guan)(guan)式(shi)(shi)換(huan)熱(re)器(qi)(qi)。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)殼(ke)(ke)式(shi)(shi)換(huan)熱(re)器(qi)(qi)是以封閉在殼(ke)(ke)體(ti)(ti)(ti)(ti)(ti)中管(guan)(guan)(guan)(guan)(guan)(guan)(guan)束(shu)的(de)壁(bi)面作為(wei)傳熱(re)面的(de)間壁(bi)式(shi)(shi)換(huan)熱(re)器(qi)(qi)。這種換(huan)熱(re)器(qi)(qi)結構(gou)較(jiao)(jiao)簡(jian)單,操作可靠,可用(yong)各種結構(gou)材(cai)料(liao)(主要是金屬材(cai)料(liao))制造,能在高(gao)溫、高(gao)壓下使(shi)用(yong),是目前應用(yong)廣的(de)類(lei)型。管(guan)(guan)(guan)(guan)(guan)(guan)(guan)殼(ke)(ke)式(shi)(shi)換(huan)熱(re)器(qi)(qi)是怎樣運行的(de)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)殼(ke)(ke)式(shi)(shi)換(huan)熱(re)器(qi)(qi)由殼(ke)(ke)體(ti)(ti)(ti)(ti)(ti)、傳熱(re)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)束(shu)、管(guan)(guan)(guan)(guan)(guan)(guan)(guan)板(ban)(ban)、折流(liu)板(ban)(ban)(擋(dang)板(ban)(ban))和(he)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)箱(xiang)等部件組成(cheng)。殼(ke)(ke)體(ti)(ti)(ti)(ti)(ti)多為(wei)圓筒形(xing),內(nei)部裝有管(guan)(guan)(guan)(guan)(guan)(guan)(guan)束(shu),管(guan)(guan)(guan)(guan)(guan)(guan)(guan)束(shu)兩端固定(ding)(ding)在管(guan)(guan)(guan)(guan)(guan)(guan)(guan)板(ban)(ban)上(shang)(shang)。進(jin)行換(huan)熱(re)的(de)冷(leng)熱(re)兩種流(liu)體(ti)(ti)(ti)(ti)(ti),一種在管(guan)(guan)(guan)(guan)(guan)(guan)(guan)內(nei)流(liu)動(dong),稱(cheng)為(wei)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)程(cheng)(cheng)流(liu)體(ti)(ti)(ti)(ti)(ti);另一種在管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外流(liu)動(dong),稱(cheng)為(wei)殼(ke)(ke)程(cheng)(cheng)流(liu)體(ti)(ti)(ti)(ti)(ti)。為(wei)提高(gao)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外流(liu)體(ti)(ti)(ti)(ti)(ti)的(de)傳熱(re)分(fen)系數,通常在殼(ke)(ke)體(ti)(ti)(ti)(ti)(ti)內(nei)安裝若干擋(dang)板(ban)(ban)。擋(dang)板(ban)(ban)可提高(gao)殼(ke)(ke)程(cheng)(cheng)流(liu)體(ti)(ti)(ti)(ti)(ti)速度,迫使(shi)流(liu)體(ti)(ti)(ti)(ti)(ti)按規定(ding)(ding)路(lu)程(cheng)(cheng)多次橫(heng)向通過管(guan)(guan)(guan)(guan)(guan)(guan)(guan)束(shu),增(zeng)強流(liu)體(ti)(ti)(ti)(ti)(ti)湍(tuan)流(liu)程(cheng)(cheng)度。換(huan)熱(re)管(guan)(guan)(guan)(guan)(guan)(guan)(guan)在管(guan)(guan)(guan)(guan)(guan)(guan)(guan)板(ban)(ban)上(shang)(shang)可按等邊三(san)角形(xing)或(huo)正方(fang)形(xing)排列。等邊三(san)角形(xing)排列較(jiao)(jiao)緊湊,管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外流(liu)體(ti)(ti)(ti)(ti)(ti)湍(tuan)動(dong)程(cheng)(cheng)度高(gao),傳熱(re)分(fen)系數大(da);正方(fang)形(xing)排列則管(guan)(guan)(guan)(guan)(guan)(guan)(guan)外清(qing)洗(xi)方(fang)便,適(shi)用(yong)于(yu)易結垢的(de)流(liu)體(ti)(ti)(ti)(ti)(ti)。
為了(le)使(shi)管板(ban)可以控(kong)制(zhi)(zhi)所(suo)有(you)的(de)(de)(de)(de)(de)方式(shi)浮動,控(kong)制(zhi)(zhi)外(wai)邊緣與(yu)殼(ke)(ke)(ke)壁(bi)之間(jian)形成一(yi)個(ge)17 ~ 23環隙寬度(du)(du),不僅減少(shao)(shao)了(le)管的(de)(de)(de)(de)(de)數量、結構(gou)和管殼(ke)(ke)(ke)式(shi)換(huan)熱(re)器,容(rong)易造成短(duan)路(lu)的(de)(de)(de)(de)(de)殼(ke)(ke)(ke)側(ce)的(de)(de)(de)(de)(de)設(she)計(ji),因此需要焊接縱(zong)向旁(pang)(pang)路(lu)風(feng)門擋(dang)板(ban)之間(jian),旁(pang)(pang)路(lu)擋(dang)板(ban)的(de)(de)(de)(de)(de)可控(kong)制(zhi)(zhi)的(de)(de)(de)(de)(de)方式(shi)。管殼(ke)(ke)(ke)式(shi)換(huan)熱(re)器的(de)(de)(de)(de)(de)好(hao)處(chu)有(you)多少(shao)(shao)通過(guo)不雅檢(jian)查、無損檢(jian)測、厚度(du)(du)測試(shi)、水壓試(shi)驗和氣密性試(shi)驗,確(que)定了(le)故障部(bu)位。U形管的(de)(de)(de)(de)(de)數量較少(shao)(shao),傳熱(re)面積較小。由(you)于(yu)換(huan)熱(re)器自身(shen)設(she)計(ji)的(de)(de)(de)(de)(de)特點和產品更新換(huan)代的(de)(de)(de)(de)(de)加(jia)快,傳統的(de)(de)(de)(de)(de)人工(gong)護(hu)理和人工(gong)繪圖的(de)(de)(de)(de)(de)設(she)計(ji)過(guo)程已不能(neng)適(shi)應其發展(zhan)。殼(ke)(ke)(ke)式(shi)換(huan)熱(re)器是換(huan)熱(re)器的(de)(de)(de)(de)(de)基(ji)礎型式(shi)之一(yi),在工(gong)業(ye)上應用于(yu)九世紀(ji)。此副本可用于(yu)選(xuan)擇(ze)所(suo)選(xuan)有(you)機(ji)物的(de)(de)(de)(de)(de)合適(shi)的(de)(de)(de)(de)(de)熱(re)交換(huan)器,并適(shi)當地(di)放置操(cao)作管線,并選(xuan)擇(ze)適(shi)當的(de)(de)(de)(de)(de)離心(xin)泵(beng)進行特定的(de)(de)(de)(de)(de)索賠。
換熱器是一種比較常見的工業設備,浙江半容積式熱交換器能夠將熱流體設備的一部分熱量傳送到溫度相對較低的設備中。根據不同標準分類,可以將換熱器分成不同類別,不同類別的換熱器之間是存在差異的,有各自的優缺點,適用的場合也不盡相同。以下就是關于不同換熱器的優缺點的總結。不同換熱器的優點和缺點被加熱水通過罐體阻力損失小。結構簡單、管理方便,可承受水壓,噪音低。換熱面積大,換熱量高。半容積式熱交換器供水水壓、水溫穩定、安全、節(jie)水、用(yong)水舒(shu)適(shi)。使用(yong)壽命長。缺(que)點(dian):外形體積(ji)(ji)(ji)較(jiao)大(da)、換(huan)(huan)(huan)熱(re)效率(lv)相對(dui)(dui)較(jiao)低(di)。殼(ke)(ke)程(cheng)清洗不(bu)方便(bian)。殼(ke)(ke)體與管子之間無溫差(cha)補償(chang)元件時(shi)會產生較(jiao)大(da)的溫差(cha)應(ying)力, 即(ji)溫差(cha)較(jiao)大(da)是需要采用(yong)膨(peng)脹(zhang)節(jie)或波紋(wen)管等補償(chang)元件減小溫差(cha)應(ying)力。板式換(huan)(huan)(huan)熱(re)器優(you)點(dian):傳熱(re)效率(lv)高,對(dui)(dui)數溫差(cha)大(da),重量輕、占地面(mian)積(ji)(ji)(ji)小,清洗方便(bian),而且容易改變換(huan)(huan)(huan) 熱(re)面(mian)積(ji)(ji)(ji)或流程(cheng)組(zu)合,適(shi)用(yong)于(yu)多(duo)重介質換(huan)(huan)(huan)熱(re)。
半容(rong)(rong)積(ji)式換(huan)熱(re)(re)器(qi)(qi)性能(neng)(neng)與特點是(shi)(shi)(shi)什么呢(ni)?而且換(huan)熱(re)(re)器(qi)(qi)的功能(neng)(neng)也是(shi)(shi)(shi)很強大(da)的,在(zai)機(ji)電行業(ye)中(zhong)都輸數一(yi)數二的,半容(rong)(rong)積(ji)式換(huan)熱(re)(re)器(qi)(qi)換(huan)熱(re)(re)器(qi)(qi)是(shi)(shi)(shi)將熱(re)(re)流(liu)體的部(bu)分熱(re)(re)量傳遞給冷(leng)流(liu)體的設(she)備.換(huan)熱(re)(re)器(qi)(qi)是(shi)(shi)(shi)化工(gong)(gong)、石油(you)、動力(li)、食品及(ji)其它許多(duo)工(gong)(gong)業(ye)部(bu)門的通用(yong)(yong)(yong)(yong)設(she)備,在(zai)生產(chan)中(zhong)占有重要(yao)地位.下(xia)面換(huan)熱(re)(re)設(she)備廠家(jia)就為(wei)大(da)家(jia)介紹一(yi)下(xia)半容(rong)(rong)積(ji)式換(huan)熱(re)(re)器(qi)(qi)的各項性能(neng)(neng)特點:高(gao)效節(jie)能(neng)(neng),換(huan)熱(re)(re)器(qi)(qi)傳熱(re)(re)系數。不銹鋼(gang)制作(zuo),使用(yong)(yong)(yong)(yong)壽命長,可達20年以上(shang)。層流(liu)為(wei)湍流(liu),提高(gao)了(le)換(huan)熱(re)(re)效率,降低(di)了(le)熱(re)(re)阻。傳熱(re)(re)速度快,耐(nai)高(gao)400℃),耐(nai)高(gao)壓(2.5Mpa)。結構(gou)緊湊,占面積(ji)小,重量輕,安裝方便,節(jie)約土建(jian)投資(zi)。設(she)計靈(ling)活,規(gui)格齊(qi)全,實用(yong)(yong)(yong)(yong)針對性強,節(jie)約資(zi)金。使用(yong)(yong)(yong)(yong)條件(jian)廣泛,適用(yong)(yong)(yong)(yong)較大(da)的壓力(li)、溫度范圍和多(duo)種(zhong)介質(zhi)熱(re)(re)交換(huan)。維(wei)護(hu)費用(yong)(yong)(yong)(yong)低(di),易(yi)操作(zuo),清垢周期長,清洗(xi)方便。使用(yong)(yong)(yong)(yong)納米熱(re)(re)膜(mo)技術(shu),顯著(zhu)增大(da)傳熱(re)(re)系數。應(ying)用(yong)(yong)(yong)(yong)領(ling)域廣闊,可廣泛用(yong)(yong)(yong)(yong)于熱(re)(re)電、廠礦(kuang)、石油(you)化工(gong)(gong)、城(cheng)市(shi)集中(zhong)供熱(re)(re)、食品醫(yi)藥、能(neng)(neng)源電子、機(ji)械輕工(gong)(gong)等(deng)領(ling)域。
1.主換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)熱(re)(re)(re)(re)端(duan)溫(wen)(wen)(wen)差偏大(da)(da)景象(xiang)某廠12000m3爪空(kong)分設(she)備接納分子篩(shai)吸附(fu)凈化(hua)、增(zeng)壓(ya)透平膨大(da)(da)、規整填料(liao)上塔(ta)及全精餾無氫制(zhi)氮(dan)外壓(ya) 縮(suo)流(liu)(liu)程。自空(kong)分設(she)備開車(che)以來(lai)(lai)(lai),用(yong)戶不(bu)(bu)斷(duan)反應主換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)熱(re)(re)(re)(re)端(duan)溫(wen)(wen)(wen)差過(guo)(guo)大(da)(da),此(ci)中一(yi)(yi)組(zu)換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)有7℃一(yi)(yi)8℃的溫(wen)(wen)(wen) 差。通過(guo)(guo)種種調(diao)理花招,液體產量仍達不(bu)(bu)到條(tiao)約要(yao)求的計劃值。檢(jian)查空(kong)分設(she)備流(liu)(liu)程圖(tu)和(he)精餾塔(ta)總(zong)圖(tu)發明,6臺主換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)(El一(yi)(yi)E6)分兩(liang)(liang)組(zu)散布,分子篩(shai)吸附(fu)器(qi)(qi)出口(kou)空(kong) 氣(qi)通過(guo)(guo)正流(liu)(liu)空(kong)氣(qi)閥(fa)Vln和(he)vllZ分別進人El一(yi)(yi)E3和(he)E4一(yi)(yi)E6兩(liang)(liang)組(zu)換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)。兩(liang)(liang)組(zu)換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)之間的熱(re)(re)(re)(re)端(duan)溫(wen)(wen)(wen)差可(ke)哄(hong)騙 v川和(he)vllZ閥(fa)來(lai)(lai)(lai)調(diao)理,每組(zu)內3個單(dan)位之間靠冷箱內配管(guan)來(lai)(lai)(lai)平衡氣(qi)流(liu)(liu)的散布。增(zeng)壓(ya)空(kong)氣(qi)出主換(huan)(huan)熱(re)(re)(re)(re)器(qi)(qi)各(ge)單(dan)位 有中部、底(di)部兩(liang)(liang)個抽口(kou),進膨大(da)(da)機(ji)的空(kong)氣(qi)溫(wen)(wen)(wen)度由中部抽口(kou)總(zong)管(guan)閥(fa)V31和(he)底(di)部抽口(kou)總(zong)管(guan)閥(fa)V犯(fan)來(lai)(lai)(lai)調(diao)理。返流(liu)(liu) 氣(qi)體只(zhi)要(yao)通過(guo)(guo)各(ge)自總(zong)管(guan)上的調(diao)理閥(fa)來(lai)(lai)(lai)調(diao)理流(liu)(liu)量。