北京空氣預(yù)熱器哪個品牌好服務(wù)為先上海板換機械設(shè)備供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" 【摘要】：為了適應(yīng)環(huán)保新要求，SCR**排放改造后，造成空預(yù)器壓差偏大，引起風(fēng)機耗電增加、喘振失速等問題，必須對空預(yù)器進行升溫或在線水沖洗。經(jīng)過多次升溫消除空預(yù)器堵塞和在線水沖洗，積累了經(jīng)驗。"><meta name="keywords" content="北京空氣預(yù)熱器哪個品牌好,空氣預(yù)熱器"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220415160732422/6470394.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7w3feqc" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220415160732422/6470394.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cg7hj3c" 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>北京空氣預(yù)熱器哪個品牌好,空氣預(yù)熱器</p><p><span>***更新：</span>2021-01-12 05:07:26</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="8287jl8" 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="qognkr7" class="page-proshow02"><p class="title">詳細說明</p><div id="uskbxjq" class="box"><p><p> 【摘要】：為了適應(yīng)環(huán)保新要求，SCR**排放改造后，造成空預(yù)器壓差偏大，引起風(fēng)機耗電增加、喘振失速等問題，必須對空預(yù)器進行升溫或在線水沖洗。經(jīng)過多次升溫消除空預(yù)器堵塞和在線水沖洗，積累了經(jīng)驗?？諝忸A(yù)熱器堵灰還會造成鍋爐排煙溫度升高,風(fēng)煙系統(tǒng)阻力增加，一次風(fēng)、二次風(fēng)正壓側(cè)和煙氣負壓側(cè)的壓差增大，增加了空氣預(yù)熱器漏風(fēng)，堵灰嚴重還會影響鍋爐的帶負荷能力。1.空預(yù)器堵塞的一般原因鍋爐燃煤煤種不符合設(shè)計值煤種含硫量過高。會引起煙氣**的降低，導(dǎo)致空預(yù)器冷端結(jié)露而造成腐蝕。燃煤低位發(fā)熱量過低，會造成燃煤量，北京空氣預(yù)熱器哪個品牌好、煙氣量增大，增加了空預(yù)器阻力。灰分過高，造成鍋爐各受熱面積灰及磨損嚴重。揮發(fā)分過高，引起灰熔點下降，更容易結(jié)焦。鍋爐啟動時制粉系統(tǒng)投入不當鍋爐啟動過程中，采用小油點火，或是啟動磨煤機時，爐膛溫度低，煤粉燃燒相對較差，勢必會造成飛灰可燃物大量增加。大量或者長時間投運油時，未燃盡的油污及未燃燒的煤粉進入空預(yù)器增加了堵灰的風(fēng)險?？疹A(yù)器吹灰介質(zhì)未達到設(shè)計值空預(yù)器采用蒸汽吹灰時，疏水不暢或時間過短，北京空氣預(yù)熱器哪個品牌好，造成空預(yù)器吹灰蒸汽過熱度不足，北京空氣預(yù)熱器哪個品牌好，吹灰效果差。有資料指出，空預(yù)器吹灰蒸汽過熱度應(yīng)保持在111-130℃。空氣預(yù)熱器的作用是使高溫煙氣冷卻，減少有害氣體排放。北京空氣預(yù)熱器哪個品牌好</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京空氣預(yù)熱器哪個品牌好,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220415160732422/6470394.jpg"></div><p style="text-indent:25px"> 空預(yù)器吹灰器故障、減壓閥調(diào)節(jié)性能不好，蒸汽帶水，不但減弱吹灰效果，嚴重時還會在高溫下與積灰泥化板結(jié)。吹灰蒸汽閥門不嚴泄露鍋爐空預(yù)器吹灰進汽閥門不嚴密，導(dǎo)致水蒸氣漏入空預(yù)器內(nèi)部，導(dǎo)致空預(yù)器堵塞。故此，在每次停爐時，對空預(yù)器吹灰進汽閥進行檢查處理，能有效避免此原因?qū)е碌亩氯l(fā)生?？疹A(yù)器水沖洗不徹底鍋爐每次停爐后，都要進行空預(yù)器水沖洗，沖洗過程一定要徹底，可采用透光法等手段進行檢查，避免沖洗不徹底。否則會在極短時間內(nèi)加重堵塞，失去沖洗的意義。空預(yù)器壓差偏大，而在實行**排放后，這一現(xiàn)象更加突出。高負荷時達到，吹灰器投運后效果不明顯，原因分析如下：空預(yù)器堵塞燃煤鍋爐爐膛內(nèi)煙氣中的SO2約有％～％被氧化成SO3。加裝SCR系統(tǒng)后，催化劑在把NOx還原成Ｎ２的同時，將約％的SO2氧化成SO3。SCR反應(yīng)器出口煙氣中存在的未反應(yīng)的逃逸氨（NH３）、SO３及水蒸氣反應(yīng)生成***氫氨或***氨：ＮＨ３＋ＳＯ３＋Ｈ２Ｏ→ＮＨ４ＨＳＯ４２ＮＨ３＋ＳＯ３＋Ｈ２Ｏ→（ＮＨ４）２ＳＯ４當煙氣中的ＮＨ３含量遠高于SO3濃度時，主要生成干燥的粉末狀***氨，不會對空預(yù)器產(chǎn)生粘附結(jié)垢。當煙氣中的SO3濃度高于逃逸氨濃度時，主要生成***氫氨（ABS）。山西空氣預(yù)熱器板式空氣預(yù)熱器價格。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京空氣預(yù)熱器哪個品牌好,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220410558876953/2374940.jpg"></div><p> 進汽端比疏水端提高了約300mm左右，可以緩解了暖風(fēng)器泄漏幾率。在暖風(fēng)器處都增加了玻璃觀察窗，以方便運行過程中檢查暖風(fēng)器是否內(nèi)漏。制粉系統(tǒng)投運時盡量滿足著火能量機組每次停運時，在條件允許的情況下，盡量將安裝有等離子點火裝置的磨煤機對應(yīng)煤斗燒空，并在下次機組啟動前將該煤斗配上發(fā)熱量大于4500kcal/kg，揮發(fā)份較高的煤種。同時等離子磨煤機啟動前應(yīng)保證二次風(fēng)溫大于200℃，以減少制粉系統(tǒng)啟動初期大量不完全燃燒產(chǎn)物的生成，從而抑止空預(yù)器堵灰的發(fā)生。加強省煤器輸灰系統(tǒng)綜合治理鍋爐日常運行中加強省煤器灰斗料位的監(jiān)視和控制，一旦發(fā)現(xiàn)高料位，立即聯(lián)系檢修進行處理。同時利用停爐機會，檢查省煤器灰斗真實料位，徹底疏通輸灰管線。對空預(yù)器要進行定期吹灰且吹灰蒸汽要保證足夠的過熱度吹灰至少每8小時進行一次，如果發(fā)現(xiàn)空預(yù)器差壓有上升趨勢，應(yīng)縮短吹灰時間間隔。吹灰程序控制必須采取疏水溫度控制，不能通過時間簡單判斷疏水是否干凈，必要時進行疏水管路改造以確?？疹A(yù)器吹灰效果。加強吹灰閥門的綜合治理每次停爐后對空預(yù)器吹灰進汽閥和吹灰***進行檢查處理，保證運行中不發(fā)生濕蒸汽泄漏到空預(yù)器換熱元件上。 </p><p style="text-indent:25px"> 隨國家節(jié)能減排工作的不斷深入，新版《火電廠大氣污染物排放標準》（GB13223-2011）要求，NOx排放限值為100mg/Nm3。現(xiàn)在燃煤鍋爐均已安裝脫硝系統(tǒng)，其中絕大部分采用SCR脫硝方式，SCR脫硝方式運行中必然發(fā)生部分氨逃逸。2013年11月份起，空預(yù)器差壓逐漸增大，至2014年3月份，在負荷到270MW時，空預(yù)器差壓比較大達：從空預(yù)器差壓發(fā)展可看出，堵塞具有如下特點：（1）A空預(yù)器堵塞情況較輕，B空預(yù)器堵塞較嚴重；（2）堵塞發(fā)展很快，2013年11月20日，負荷280MW時，A、B側(cè)空預(yù)器煙氣差壓*分別為、，到4個月后，2014年3月27日煙氣差壓已達到。其中特別是B側(cè)空預(yù)器，堵塞明顯嚴重，造成B側(cè)煙氣流量減少。因而A引風(fēng)機煙氣通流量加大，電流明顯上升，由134A上升到160A。（3）B空預(yù)器旋轉(zhuǎn)一圈的情況下，差壓呈周期性變化，比較大達kPa，**小達kPa，說明B空預(yù)器局部堵塞嚴重。即便以**小值比較，堵塞現(xiàn)象也較為明顯?？疹A(yù)器解體后堵塞情況2014年4月大修期間，解體空預(yù)器蓄熱元件，發(fā)現(xiàn)堵塞情況主要集中冷段蓄熱元件約350mm以下部位，且堵塞物較硬。堵塞物化學(xué)分析空預(yù)器冷端冷端密封板上均為結(jié)晶樣顆粒，且結(jié)晶物較為堅硬。空預(yù)器運行半年后阻力增加約50%，對引風(fēng)機也會造成較大影響。板式空氣預(yù)熱器制造廠家有哪些？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京空氣預(yù)熱器哪個品牌好,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220412821406250/101176.jpg"></div><p> 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，加寬扇形板，形成雙密封面，漏風(fēng)率可降低30%，通常漏風(fēng)率低于6%。不足之處是風(fēng)煙阻力略有增加，轉(zhuǎn)子重量增加；如將原傳熱元件拆包切割，易造成傳熱面積下降和損元件。鶴崗電廠采用了該方案。2）三道密封改造：在原雙密封改造基礎(chǔ)上，進一步增加轉(zhuǎn)子隔倉，加寬扇形板，形成三道密封面，漏風(fēng)率可在雙密封基礎(chǔ)上進一步下降12%。但造成隔倉過密，傳熱元件偏小，風(fēng)煙阻力上升10%左右。目前部分一次風(fēng)壓頭較高的新機組采用。3）拖拽式軟密封技術(shù)：類似柔性密封技術(shù)，在徑向隔板原徑向密封片的基礎(chǔ)上，再增加一道較薄的有一定彈性和折角較大的密封片，以增加密封道數(shù)，并允許密封片與扇形板有一定接觸。在投運初期能有效降低漏風(fēng)率（可至4%左右）。不足之處：只在間隙小于10mm時有效，大機組無LCS（間隙自調(diào)裝置）時熱端效果不明顯；運行時間長后接觸式密封片易磨損失效。板式空氣預(yù)熱器是上海板換機械設(shè)備有限公司主要產(chǎn)品之一。山西空氣預(yù)熱器</p><p style="text-indent:25px">板式空氣預(yù)熱器使用在熱風(fēng)爐。北京空氣預(yù)熱器哪個品牌好</p><p style="text-indent:25px"> 空氣預(yù)熱器就是鍋爐尾部煙道中的煙氣通過內(nèi)部的散熱片將進入鍋爐前的空氣預(yù)熱到一定溫度的受熱面，是一種用于提高鍋爐的熱交換性能，降低能量消耗的設(shè)備。空氣預(yù)熱器一般分為板式、回轉(zhuǎn)式和管式三種。以回轉(zhuǎn)式為例介紹了空氣預(yù)熱器的工作原理。大量未燃盡的可燃物會沉積在傳熱元件上可能空預(yù)器著火，因此對其著火原因進行了分析，并著火原因及應(yīng)對措施進行了詳細說明；還詳細介紹了掉閘分析以及漏風(fēng)治理。多用于燃煤電站鍋爐。可分為管箱式、回轉(zhuǎn)式兩種，其中回轉(zhuǎn)式又分為風(fēng)罩回轉(zhuǎn)式和受熱面回轉(zhuǎn)式兩種。電站鍋爐較常采用受熱面回轉(zhuǎn)式預(yù)熱器。在鍋爐中的應(yīng)用一般為兩分倉、三分倉、四分倉式，其中四分倉較常用于循環(huán)流化床鍋爐中。北京空氣預(yù)熱器哪個品牌好</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2809743.html</p></div></div></div></div></div><div id="3is7m8l" class="page-right twoColRt"><div id="3frd3o3" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="6ebdvco" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強信息推薦自業(yè)物資供應(yīng)" class="vcenter" 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