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<meta http-equiv="Cache-Control" content="no-siteapp" /> <script>var V_PATH="/";window.onerror=function(){ return true; };</script> </head><body> <h1><a href="http://www.cdcfah.com/">六月丁香婷婷亚洲中文字幕,欧美精品高清一区二区蜜芽,尤物92午夜福利视频,精品视频一区二区三区在线观看</a></h1> <div style="position:fixed;left:-9000px;top:-9000px;"><object id="qgqbi"></object><delect id="qgqbi"><sub id="qgqbi"><dl id="qgqbi"></dl></sub></delect><track id="qgqbi"></track><tr id="qgqbi"></tr><video id="qgqbi"></video><xmp id="qgqbi"><span id="qgqbi"></span></xmp><span id="qgqbi"></span><strong id="qgqbi"><em id="qgqbi"><sup id="qgqbi"><progress id="qgqbi"></progress></sup></em></strong><dl id="qgqbi"><small id="qgqbi"></small></dl><wbr id="qgqbi"></wbr><noscript id="qgqbi"></noscript><tr id="qgqbi"></tr><track id="qgqbi"><dl id="qgqbi"></dl></track><label id="qgqbi"><em id="qgqbi"></em></label><tbody id="qgqbi"></tbody><blockquote id="qgqbi"></blockquote><dfn id="qgqbi"><center id="qgqbi"></center></dfn><sub id="qgqbi"></sub><u 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href="http://www.cdcfah.com/cp/third-crsbje_qtcrsbpw/">其他傳熱設(shè)備</a>?海南空氣預(yù)熱器生產(chǎn)商上海板換機械設(shè)備供應(yīng)</p><div id="velnf2c" class="leftbox clearfix"><h1>海南空氣預(yù)熱器生產(chǎn)商上海板換機械設(shè)備供應(yīng)</h1><div id="jsuwdc4" class="proBig"><div id="38myvxr" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="es2crnm" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="8lx8cwi" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>海南空氣預(yù)熱器生產(chǎn)商,空氣預(yù)熱器</p><p><span>***更新：</span>2020-08-15 07:07:10</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="i7roqc7" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海板換機械設(shè)備有限公司</a></p><p><span>聯(lián)系人：</span>張云周</p><p><span>郵箱: </span>shinfo@shphe.com</p><p><span>電話: </span>15921733465</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.shphe.com</p><p><span>手機: </span>021-57247534</p><p><span>地址: </span>山陽鎮(zhèn)山寧路99號</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="3ac2iho" class="page-proshow02"><p class="title">詳細說明</p><div id="mf8fctq" class="box"><p><p> 空預(yù)器吹灰壓力、疏水溫度，脫硝催化劑出口氨逃逸等表計的檢測維護，保證指示準(zhǔn)確?？疹A(yù)器檢修中要通過校直大軸、修復(fù)密封片、利用新型密封技術(shù)等降低空預(yù)器漏風(fēng)率，提高空預(yù)器出口排煙溫度。C級及以上計劃檢修時，根據(jù)空預(yù)器腐蝕、積灰情況把蓄熱元件拆包徹底清洗，冷、熱端蓄熱元件復(fù)裝時調(diào)換位置使用。空預(yù)器堵塞嚴重的，要分析蓄熱元件高度和直徑設(shè)計是否合理，必要時進行大通道蓄熱元件換型改造（改成L型直通道），或進行空預(yù)器增加直徑改造。投用暖風(fēng)器或熱風(fēng)再循環(huán)系統(tǒng)，將對機組經(jīng)濟性產(chǎn)生不利影響，機組煤耗將上升1-3g/kWh，海南空氣預(yù)熱器生產(chǎn)商，因此，海南空氣預(yù)熱器生產(chǎn)商，海南空氣預(yù)熱器生產(chǎn)商，在冷端綜合溫度（或冷端平均溫度）滿足要求的情況下，應(yīng)及時停用暖風(fēng)器或熱風(fēng)再循環(huán)系統(tǒng)，防止過量投入造成能耗增加?？疹A(yù)器在線高壓水沖洗案例：2012年11月，珞璜電廠在#5爐（600MW）運行中成功進行了空預(yù)器冷端傳元熱件在線高壓水沖洗，取得成效。在《火力發(fā)電機節(jié)能降耗技術(shù)導(dǎo)則》、《300MW鍋爐及輔機節(jié)能降耗技術(shù)導(dǎo)則》和《燃煤電廠節(jié)能降耗技術(shù)推廣應(yīng)用目錄》推薦的相關(guān)技術(shù)基礎(chǔ)上，對空預(yù)器密封治理的相關(guān)技術(shù)和注意事項進行介紹：（1）密封方式簡介1)雙道密封改造：將轉(zhuǎn)子隔倉數(shù)增加一倍，通常由24分倉改為48分倉。用板式空氣預(yù)熱器回收高溫?zé)煔鉄崮?，預(yù)熱廢氣溫度。海南空氣預(yù)熱器生產(chǎn)商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海南空氣預(yù)熱器生產(chǎn)商,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.jpg"></div><p> 還可以減少一次風(fēng)沿轉(zhuǎn)子的上下端面通過徑向間隙漏到二次風(fēng)的漏風(fēng)量；主要由扇形板和徑向密封片及間隙調(diào)整裝置等組成。軸向密封：空預(yù)器在轉(zhuǎn)子外圓周和機殼之間有較大的空間，如果不采取密封措施，空氣會漏到煙氣中去。為了減少空氣在轉(zhuǎn)子周圍沿其周向漏到煙氣區(qū)，故需裝設(shè)軸向密封裝置。軸向密封裝置由軸向密封片與軸向密封板組成。軸向密封片固定在轉(zhuǎn)子外圓管的徑向倉隔板上，從熱端到冷端，沿著整個轉(zhuǎn)子的高度（即軸向）裝設(shè)。可調(diào)軸向密封板裝于主支座板的內(nèi)側(cè)，與扇形板外側(cè)端相齊平，從熱端延伸到冷端。環(huán)向密封：包括轉(zhuǎn)子外周上、下端處的旁路密封（周向密封）和中心筒密封兩部分。旁路密封分為外環(huán)向密封和內(nèi)環(huán)向密封兩種。外環(huán)向密封是防止空氣通過轉(zhuǎn)子外圓筒的上、下端面漏入轉(zhuǎn)子外圓筒與外殼之間的空隙，再沿這個空隙漏向煙氣側(cè)。內(nèi)環(huán)向密封是防止空氣通過軸的上、下端面漏入煙氣通道，旁路密封主要由旁路密封片和T型鋼組成；中心筒密封片固定在轉(zhuǎn)子中心筒的熱端和冷端端板的圓周上，并隨轉(zhuǎn)子一起旋轉(zhuǎn)。密封片與固定在機殼的環(huán)形密封盤或密封蓋的凸緣之間保持一定的間隙。內(nèi)蒙古空氣預(yù)熱器的用途和特點你知道板式空預(yù)器是什么？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海南空氣預(yù)熱器生產(chǎn)商,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039599609/9723902.jpg"></div><p> 本起空預(yù)器堵塞事件中B側(cè)空預(yù)器發(fā)生***氫氨堵塞嚴重，而A側(cè)較輕的原因經(jīng)檢查為：B側(cè)脫硝從鍋爐尾部煙道轉(zhuǎn)彎到脫硝入口的水平煙道處積灰明顯比A側(cè)積灰要嚴重，進一步檢查發(fā)現(xiàn)B進口在安裝時少安裝一級導(dǎo)流板，說明，B側(cè)脫硝因少裝一級導(dǎo)流板，造成煙氣中因渦流等原因形成煙道阻力加大，一方面因B側(cè)入口流場不均，易造成局部氨逃逸率增加。另一方面B側(cè)煙氣流量降低，進一步加劇流場不均。**終導(dǎo)致B側(cè)脫硝局部氨逃逸率超標(biāo)幅度增加，造成B側(cè)空預(yù)器堵塞更嚴重。4結(jié)論為提高SCR脫硝工藝脫硝效率，NH3/NOx摩爾比通?？刂茷榇笥?，因此脫硝過程氨逃逸不可避免。SCR脫硝過程使用的釩基催化劑會對煙氣中的SO2產(chǎn)生催化作用，使其易被氧化為SO3。SO3與逃逸的氨反應(yīng)生成***氫氨，***氫氨附著于催化劑的表面會阻塞催化劑并影響其活性，且***氫氨的粘性使之易于牢固黏附在空預(yù)器蓄熱元件的表面，使蓄熱元件積灰，空預(yù)器流通截面減小、阻力增加以及換熱元件的換熱效率下降。可通過控制SCR脫硝過程氨逃逸量和煙氣中SO3的方法減少***氫氨的生成量。為防止催化劑因***氫氨的滯留而失去活性，應(yīng)合理控制SCR脫硝裝置在低負荷下的運行時間。為有效降低***氫氨在空預(yù)器換熱元件上的形成速率。</p><p> 達到破壞板片表面鈍化層的腐蝕條件。同時，由于此區(qū)域板片冷沖壓形成的內(nèi)部應(yīng)力較大，在表面鈍化層被破壞的情況下，內(nèi)部應(yīng)力作用導(dǎo)致應(yīng)力腐蝕的發(fā)生。處理方法：①更換有裂紋或穿孔板片，在現(xiàn)場用透光法查找板片裂紋。②調(diào)整運行參數(shù)，使其達到設(shè)計條件。③換熱器維修組裝時夾緊尺寸應(yīng)符合要求，并不是越小越好。④板式換熱器板片材料合理匹配。壓降過大產(chǎn)生原因：①運行系統(tǒng)管路未進行正常吹洗，特別是新安裝系統(tǒng)管路中許多臟物（如焊渣等）進入板式換熱器的內(nèi)部。由于板式換熱器流道截面積較窄，換熱器內(nèi)的沉淀物和懸浮物聚集在角孔處和導(dǎo)流區(qū)內(nèi)，導(dǎo)致該處的流道面積大為減小，造成壓力主要損失在此部位。②板式換熱器選型時面積偏小，造成板間流速過高而壓降偏大。③板式換熱器運行一段時間后，因板片表面結(jié)垢引起壓降過大。實例：2000年我廠為新疆用戶提供了BR10型板式換熱器，用于水一水換熱的集中供熱系統(tǒng)，一次供水設(shè)計溫度為130℃。在換熱器設(shè)計選型時。傳熱導(dǎo)數(shù)偏高，接近5500w/(rn·K），而實際應(yīng)在3500w/(rn·K）。同時，設(shè)計單位在水泵選型時流量余量又偏大，造成換熱器二次側(cè)介質(zhì)板間流速超過1m/s，實際運行壓降在～MPa，使得二次網(wǎng)水力平衡嚴重失調(diào)。板式空氣預(yù)熱器的作用是降低能源消耗。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="海南空氣預(yù)熱器生產(chǎn)商,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220410559414062/9489232.jpg"></div><p> 與水媒式暖風(fēng)器組成閉式循環(huán)系統(tǒng)?？諝忸A(yù)熱器進風(fēng)溫度的提高使排煙溫度升高，一方面使前置煙冷器傳熱溫差增加，更有效回收低溫?zé)煔庥酂?；另一方面則較大幅度提升空氣預(yù)熱器的冷端綜合溫度，有效緩解空氣預(yù)熱器***氫銨堵塞和腐蝕；同時mggh煙氣冷卻器入口煙溫的提高減少了mggh系統(tǒng)的蒸汽消耗量，降低機組供電煤耗。本實用新型的更優(yōu)技術(shù)方案為：所述蒸汽暖風(fēng)器的進口上連接有蒸汽管，且其出口上連接有疏水管。所述蒸汽管上安裝有電動調(diào)節(jié)閥，疏水管上安裝有疏水閘閥；通過蒸汽暖風(fēng)器對冷空氣做初步加熱。所述前置煙冷器的進水母管上安裝有循環(huán)水泵，為前置煙冷器和水媒式暖風(fēng)器之間的交換水循環(huán)運行提供動力。所述前置煙冷器出口的煙道內(nèi)沿?zé)煔饬鲃臃较蛞来伟惭b有mggh煙氣冷卻器、電除塵器、引風(fēng)機、吸收塔、煙氣再熱器和煙囪；且煙氣再熱器和mggh煙氣冷卻器之間連接有熱媒加熱器和安裝循環(huán)水泵的管道，實現(xiàn)mggh系統(tǒng)的運行。在一些焚燒爐系統(tǒng)中用板式空氣預(yù)熱器提高系統(tǒng)效率。內(nèi)蒙古空氣預(yù)熱器的用途和特點</p><p style="text-indent:25px">板式空氣預(yù)熱器是一種節(jié)能設(shè)備。海南空氣預(yù)熱器生產(chǎn)商</p><p> NH3和SO3濃度乘積影響***氫氨形成的另一重要因素是NH3和SO3濃度的乘積。以往認為如果氨逃逸量在2μL/L以下將不會形成***氫氨，然而事實上在足夠高的SO3煙氣濃度下即使1μL/L的氨逃逸量仍可形成***氫氨。而且，隨著NH3和SO3濃度乘積的升高，***氫氨的**溫度升高，使得空預(yù)器發(fā)生***氫氨沉積的范圍進一步加大。隨鍋爐運行負荷變化，會導(dǎo)致通過催化劑的煙氣量、溫度、煙氣流速等發(fā)生變化，從而對***氫氨的形成產(chǎn)生影響：在鍋爐滿負荷(MCR)運行時，催化劑區(qū)域溫度較高，流場也較為均勻，***氫氨的形成可能降低；反之，隨著鍋爐運行負荷的降低，煙氣流量降低，催化劑區(qū)域溫度降低，***氫氨的形成可能增加。3***氫氨的控制～230℃之間的溫區(qū)位于空預(yù)器常規(guī)設(shè)計的冷段層上方和中間層下方，由于***氫氨在此溫區(qū)為液態(tài)向固態(tài)轉(zhuǎn)變階段，具有極強的吸附性，會造成大量灰分在空預(yù)器沉降，引起空預(yù)器堵塞及阻力上升，嚴重時將迫使停爐以清理空預(yù)器。同時，***氫氨或***氨本身對金屬有較強的腐蝕性，會造成催化劑金屬支撐架和空預(yù)器冷段腐蝕。因此必須嚴格控制氨泄漏量，一般要求小于3μL/L。當(dāng)反應(yīng)器入口管道設(shè)計不合理時，會引起反應(yīng)器截面上的NH3/NOx摩爾比、流量或溫度出現(xiàn)偏差。海南空氣預(yù)熱器生產(chǎn)商</p><p style="text-indent:25px">上海板換機械設(shè)備有限公司位于上海市，創(chuàng)立于2005-11-30。公司業(yè)務(wù)涵蓋[ "板式換熱器機組", "可拆式板式換熱器", "焊接式板式換熱器", "板式空氣預(yù)熱器" 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