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1. 本系列熱交換器,熱媒既可單為蒸汽或高溫、低溫熱水,浙江板式換熱器價格亦可交替使用蒸汽或高、低溫熱水,設計選用時請注明熱媒品種。2. 本系列熱交換器必須設置安全裝置。下列三種可任選其一:(1) 熱交換器頂部設置安全閥,安全閥的選擇、使用和安裝應符合勞動部頒發的《壓力容器安全技術監察規程》的規定。(2) 頂部裝設接通大氣的引出管(在有條件的場合)。(3)裝設膨脹水箱。3. 本系列熱交換器的支座按標準選用,三個支座中,一個固定支座,兩個為活動支座。活動支座的地腳螺栓采用雙螺母,板式換熱器第一(yi)(yi)個(ge)螺(luo)母在(zai)加一(yi)(yi)小墊(dian)片(pian)擰緊(jin)(jin)后(hou)倒(dao)退(tui)一(yi)(yi)圈,然后(hou)用(yong)第二個(ge)螺(luo)母鎖緊(jin)(jin),以便(bian)支座能在(zai)基礎上(shang)自由滑動。4. 在(zai)使用(yong)中,應(ying)根據被加熱(re)水(shui)水(shui)質(zhi)與使用(yong)情(qing)況定(ding)期清理(li)水(shui)垢,當被加熱(re)水(shui)硬(ying)度較高時,宜(yi)采用(yong)適(shi)宜(yi)的軟化措施
鈦熱(re)(re)(re)交換(huan)器特點(dian):鈦換(huan)熱(re)(re)(re)器因金(jin)屬離子不易流失、所以(yi)可充分利用(yong)(yong)這種非磁性特點(dian),用(yong)(yong)做制藥及食品等(deng)用(yong)(yong)途(tu)的(de)換(huan)熱(re)(re)(re)器。由于(yu)鈦的(de)抗腐(fu)蝕能力強、所以(yi)器換(huan)熱(re)(re)(re)器的(de)使(shi)用(yong)(yong)壽命(ming)長、并且在使(shi)用(yong)(yong)中維護費(fei)用(yong)(yong)也(ye)少(shao)。此外、因其(qi)具有體積小、換(huan)熱(re)(re)(re)能力大等(deng)優點(dian)、相(xiang)關設(she)備(如(ru)泵)的(de)投資及運(yun)行費(fei)用(yong)(yong)也(ye)能相(xiang)應減少(shao)鈦熱(re)(re)(re)交換(huan)器應用(yong)(yong)范圍:鈦換(huan)熱(re)(re)(re)器憑借(jie)工業純鈦的(de)各(ge)種優良性質,廣泛應用(yong)(yong)于(yu)各(ge)類海鮮養(yang)殖(zhi),海水換(huan)熱(re)(re)(re),鹽(yan)水換(huan)熱(re)(re)(re),化工,食品,醫(yi)藥,冶(ye)金(jin),制冷,輕(qing)工,電(dian)(dian)鍍行業、鋁氧化槽、制鹽(yan)、造紙、超聲(sheng)波、電(dian)(dian)子通訊、集(ji)中供(gong)熱(re)(re)(re)等(deng)行業和(he)領域(yu)。
波(bo)紋管(guan)即(ji)臥(wo)(wo)式(shi)容(rong)積式(shi)換熱(re)(re)(re)器分為(wei)S型(xing)(xing)(xing)與(yu)H型(xing)(xing)(xing)。S型(xing)(xing)(xing)臥(wo)(wo)罐(guan)提(ti)供(gong)汽水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)用,H型(xing)(xing)(xing)臥(wo)(wo)罐(guan)提(ti)供(gong)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)用。臥(wo)(wo)式(shi)容(rong)積式(shi)換熱(re)(re)(re)器性(xing)能特點:1.換熱(re)(re)(re)量(liang)(liang)大。H型(xing)(xing)(xing)“新臥(wo)(wo)罐(guan)、水(shui)(shui)(shui)(shui)(shui)(shui)(shui)一(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)時(shi)(shi)(shi),換熱(re)(re)(re)量(liang)(liang)為(wei)同(tong)型(xing)(xing)(xing)“標(biao)準臥(wo)(wo)罐(guan)”的2倍(bei)以上(shang),S型(xing)(xing)(xing)“新臥(wo)(wo)罐(guan)”汽一(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)時(shi)(shi)(shi),換熱(re)(re)(re)量(liang)(liang)為(wei)同(tong)型(xing)(xing)(xing)“標(biao)準臥(wo)(wo)罐(guan)”的1.2倍(bei)。2.熱(re)(re)(re)媒溫降(jiang)大。汽水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)時(shi)(shi)(shi),凝結水(shui)(shui)(shui)(shui)(shui)(shui)(shui)出水(shui)(shui)(shui)(shui)(shui)(shui)(shui)溫度約50℃,回水(shui)(shui)(shui)(shui)(shui)(shui)(shui)管(guan)上(shang)不需設疏水(shui)(shui)(shui)(shui)(shui)(shui)(shui)器,給使用維(wei)修帶來方(fang)便,水(shui)(shui)(shui)(shui)(shui)(shui)(shui)一(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)時(shi)(shi)(shi),熱(re)(re)(re)媒溫降(jiang)為(wei)同(tong)型(xing)(xing)(xing)“標(biao)準臥(wo)(wo)罐(guan)”的2?2.5倍(bei),120?150℃的高溫熱(re)(re)(re)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)后(hou)可(ke)降(jiang)70?75℃。3.H型(xing)(xing)(xing)“新臥(wo)(wo)罐(guan)”適用于(yu)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)一(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re),亦可(ke)用于(yu)汽一(yi)水(shui)(shui)(shui)(shui)(shui)(shui)(shui)換熱(re)(re)(re)。4.換熱(re)(re)(re)效(xiao)果(guo)好,散(san)熱(re)(re)(re)損失少,節能。同(tong)時(shi)(shi)(shi),以蒸汽為(wei)熱(re)(re)(re)媒時(shi)(shi)(shi),能回收約占整個換熱(re)(re)(re)量(liang)(liang)的15%的凝結水(shui)(shui)(shui)(shui)(shui)(shui)(shui)熱(re)(re)(re)量(liang)(liang)。
管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)是(shi)把(ba)換熱(re)管(guan)(guan)(guan)束與管(guan)(guan)(guan)板連接(jie)后(hou),再用(yong)筒體(ti)與管(guan)(guan)(guan)箱包(bao)起來,形(xing)成(cheng)(cheng)兩個獨(du)立的(de)(de)(de)(de)空間。管(guan)(guan)(guan)內的(de)(de)(de)(de)通道(dao)(dao)及與其(qi)相貫通的(de)(de)(de)(de)管(guan)(guan)(guan)箱稱為(wei)管(guan)(guan)(guan)程;管(guan)(guan)(guan)外的(de)(de)(de)(de)通道(dao)(dao)及與其(qi)相貫通的(de)(de)(de)(de)部(bu)(bu)分稱為(wei)殼(ke)(ke)(ke)程。一種流(liu)體(ti)在(zai)管(guan)(guan)(guan)內流(liu)動,而另一種流(liu)體(ti)在(zai)殼(ke)(ke)(ke)與管(guan)(guan)(guan)束之間從管(guan)(guan)(guan)外表面流(liu)過(guo),為(wei)了保證(zheng)殼(ke)(ke)(ke)程流(liu)體(ti)能夠橫(heng)向流(liu)過(guo)管(guan)(guan)(guan)束,以形(xing)成(cheng)(cheng)較高的(de)(de)(de)(de)傳熱(re)速率,在(zai)外殼(ke)(ke)(ke)上裝有許多(duo)擋板。管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)管(guan)(guan)(guan)束腐蝕和磨蝕失效(xiao)(xiao)的(de)(de)(de)(de)主要原因管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)在(zai)使用(yong)的(de)(de)(de)(de)過(guo)程中可(ke)能會發生失效(xiao)(xiao)的(de)(de)(de)(de)情況(kuang),常(chang)見的(de)(de)(de)(de)失效(xiao)(xiao)是(shi)管(guan)(guan)(guan)束失效(xiao)(xiao)的(de)(de)(de)(de)情況(kuang)管(guan)(guan)(guan)束腐蝕和磨蝕失效(xiao)(xiao)、傳熱(re)能力下(xia)降、管(guan)(guan)(guan)束泄(xie)漏.以下(xia)是(shi)關(guan)于管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)官術失效(xiao)(xiao)的(de)(de)(de)(de)具體(ti)介紹。管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)出現(xian)管(guan)(guan)(guan)束失效(xiao)(xiao)的(de)(de)(de)(de)情況(kuang)有哪(na)些(xie)?管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)的(de)(de)(de)(de)失效(xiao)(xiao)大(da)多(duo)數是(shi)由腐蝕引起的(de)(de)(de)(de)。最(zui)常(chang)見的(de)(de)(de)(de)管(guan)(guan)(guan)殼(ke)(ke)(ke)式(shi)換熱(re)器(qi)(qi)腐蝕部(bu)(bu)位是(shi)換熱(re)管(guan)(guan)(guan),然后(hou)依(yi)次是(shi)管(guan)(guan)(guan)板、換熱(re)器(qi)(qi)封頭 及小直(zhi)徑的(de)(de)(de)(de)接(jie)管(guan)(guan)(guan)。
在檢(jian)修維護換熱(re)器汽包(bao)(bao)時(shi)發現(xian)汽包(bao)(bao)封(feng)頭(tou)泄(xie)漏,在汽包(bao)(bao)封(feng)頭(tou)的閥蓋角(jiao)(jiao)焊(han)縫處出(chu)現(xian)裂(lie)紋,裂(lie)紋平行(xing)于(yu)焊(han)縫。采(cai)用(yong)宏觀形貌(mao)分(fen)(fen)析(xi)、化(hua)(hua)學成(cheng)分(fen)(fen)分(fen)(fen)析(xi)、金相檢(jian)驗、顯微硬度測(ce)定、能譜分(fen)(fen)析(xi)以(yi)及應力(li)(li)分(fen)(fen)析(xi)等方法對泄(xie)漏處進(jin)行(xing)了分(fen)(fen)析(xi)。結(jie)果表(biao)明,汽包(bao)(bao)中(zhong)水質含(han)有較高濃度的堿性(xing)元素(su)和氯、硫、氧等強(qiang)腐蝕性(xing)元素(su),又(you)在焊(han)接殘余應力(li)(li)的作用(yong)下發生應力(li)(li)腐蝕開(kai)裂(lie),最后(hou)導致汽包(bao)(bao)封(feng)頭(tou)產生泄(xie)漏。應力(li)(li)腐蝕;沿晶;堿脆;軋制帶狀組織某(mou)化(hua)(hua)工(gong)廠換熱(re)器汽包(bao)(bao)于(yu)1996年(nian)(nian)投入使(shi)用(yong),于(yu)2005年(nian)(nian)上半年(nian)(nian)維護檢(jian)修時(shi)發現(xian)滲漏。經去除外(wai)面保溫材料(liao)后(hou),發現(xian)汽包(bao)(bao)封(feng)頭(tou)的蓋板角(jiao)(jiao)焊(han)縫位置出(chu)現(xian)裂(lie)紋,裂(lie)紋為穿(chuan)透型,起源于(yu)汽包(bao)(bao)封(feng)頭(tou)內表(biao)面,換熱(re)器外(wai)形尺寸(cun)為1632mm9423mm,汽包(bao)(bao)封(feng)頭(tou)外(wai)形尺寸(cun)1632mm400mm,汽包(bao)(bao)封(feng)頭(tou)材料(liao)為16MnR鋼。