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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)品關鍵詞：</span>上?？諝忸A熱器制造商,空氣預熱器</p><p><span>***更新：</span>2020-12-22 05:07:49</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="nwiz22c" 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="buls7ms" class="page-proshow02"><p class="title">詳細說明</p><div id="n7hdfwn" class="box"><p><p> 技術領域本實用新型涉及電站鍋爐空預器運行安全技術領域，特別涉及一種有效緩解空預器***氫銨堵塞的聯(lián)合系統(tǒng)。背景技術：目前，部分燃煤鍋爐排煙溫度低于設計值，導致空氣預熱器冷端綜合溫度降低、***氫銨腐蝕及堵塞加劇，上?？諝忸A熱器制造商、煙氣余熱的能級降低，上?？諝忸A熱器制造商、引風機電耗增大等問題。尤其針對裝設有mggh系統(tǒng)的機組，單純利用空氣預熱器出口的煙氣余熱，不足以將脫硫塔出口的煙氣溫度提升至設計值，需另外投入大量的輔助蒸汽來維持煙囪入口煙氣溫度。（三）技術實現(xiàn)要素：本實用新型為了彌補現(xiàn)有技術的不足，提供了一種結(jié)構(gòu)簡單、設計合理的有效緩解空預器***氫銨堵塞的聯(lián)合系統(tǒng)。本實用新型是通過如下技術方案實現(xiàn)的：一種有效緩解空預器***氫銨堵塞的聯(lián)合系統(tǒng)，包括安裝在空氣預熱器出口至mggh煙氣冷卻器進口煙道之間的前置煙冷器，用來吸收煙氣余熱；安裝在送風機出口冷風道內(nèi)的蒸汽暖風器，用來加熱鍋爐送風；安裝在蒸汽暖風器出口至空氣預熱器入口風道之間的水媒式暖風器，上?？諝忸A熱器制造商，用來進一步提高鍋爐送風溫度。本實用新型采用前置煙冷器聯(lián)合水媒式暖風器和蒸汽暖風器共同加熱鍋爐送風。蒸汽暖風器采用旋轉(zhuǎn)式，可根據(jù)環(huán)境溫度和機組負荷進行調(diào)整，減少風機電耗。前置煙冷器回收部分煙氣余熱。板式空氣預熱器使用在鋼鐵行業(yè)的煉鋼爐。上?？諝忸A熱器制造商</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？諝忸A熱器制造商,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039677734/951043.jpg"></div><p> 對于因氨量瞬間過大造成***氫氨堵塞空預器情況時有發(fā)生，為了預防空預器及風煙系統(tǒng)的安全、經(jīng)濟運行，應該制定定期工作，各單元機組均應按規(guī)定認真執(zhí)行。每月20日中班，選取負荷大于80%階段（250MW、480MW），進行兩個小時空預器升溫工作，A、B兩側(cè)分別進行。減小送風量（或增大引風機開度）以提高該側(cè)煙溫至160~170℃之間，注意比較高點不能超過170℃（針對布袋除塵器，排煙溫度不可超過180℃。若無此限值，則應升高至230℃更佳）。每年10月底至4月初暖風器轉(zhuǎn)入運位后，升溫期間利用該側(cè)暖風器，根據(jù)煙溫變化情況和預熱器電流變化情況提高送風溫度至30~40℃之間，其余時間不用投入暖風器。4.升溫消除空預器壓差增大方法及注意事項鍋爐運行中，預熱器阻力超過，應開始執(zhí)行以下措施：投入該側(cè)暖風器，根據(jù)煙溫變化情況和預熱器電流變化情況提高送風溫度至30~40℃之間（暖風器停運期間除外）。減小送風量（增大引風機開度）以提高該側(cè)煙溫至160~165℃之間，注意比較高點不能超過170℃（針對布袋除塵器，排煙溫度不可超過180℃，若無此限值，則應升高至230℃更佳）。加強預熱器蒸汽吹灰頻次（投入空預器蒸汽連續(xù)吹灰），直至阻力下降至（75%以上負荷）以下。內(nèi)蒙古通用空氣預熱器用板式空氣預熱器回收高溫煙氣熱能，預熱廢氣溫度。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？諝忸A熱器制造商,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220414500673828/8758232.jpg"></div><p> 流程和流道的選擇流程指板式換熱器內(nèi)一種介質(zhì)同前列動方向的一組并聯(lián)流道，而流道指板式換熱器內(nèi)，相鄰兩板片組成的介質(zhì)流動通道。一般情況下，將若干個流道按并聯(lián)或串聯(lián)的方式連接起來，以形成冷、熱介質(zhì)通道的不同組合。流程組合形式應根據(jù)換熱和流體阻力計算，在滿足工藝條件要求下確定。盡量使冷、熱水流道內(nèi)的對流換熱系數(shù)相等或接近，從而得到比較好的傳熱效果。因為在傳熱表面兩側(cè)對流換熱系數(shù)相等或接近時傳熱系數(shù)獲得較大值。雖然板式換熱器各板間流速不等，但在換熱和流體阻力計算時，仍以平均流速進行計算。由于“U”形單流程的接管都固定在壓緊板上，拆裝方便。壓降校核在板式換熱器的設計選型時，一般對壓降有一定的要求，所以應對其進行校核。如果校核壓降超過允許壓降，需重新進行設計選型計算，直到滿足工藝要求為止。計算方法關于傳熱系數(shù)和壓降的計算，由各個廠家產(chǎn)品的性能曲線計算得到。性能曲線（準則關聯(lián)式）一般來自于產(chǎn)品的性能測試。對于缺少性能測試的板型，也可通過參考尺寸法，根據(jù)板型的特性幾何尺寸獲得板型的準則關聯(lián)式，國際上的一些通用軟件均采用這種方法。選型軟件關于板式換熱器的選型軟件。</p><p> 加寬扇形板，形成雙密封面，漏風率可降低30%，通常漏風率低于6%。不足之處是風煙阻力略有增加，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，漏風率可在雙密封基礎上進一步下降12%。但造成隔倉過密，傳熱元件偏小，風煙阻力上升10%左右。目前部分一次風壓頭較高的新機組采用。3）拖拽式軟密封技術：類似柔性密封技術，在徑向隔板原徑向密封片的基礎上，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。加壓密封技術：通常用于GGH，即GGH的低泄漏風系統(tǒng)。綜合性密封技術：部分廠家綜合以上多種技術的特點，對空預器徑向、軸向、周向（旁路）密封和相關靜密封進行針對性設計，實施漏風率控制；1）運行調(diào)節(jié)及維護注意事項1）除精心控制好徑向、軸向密封間隙外，還要注意控制好密封板的端部密封。板式空氣預熱器有什么優(yōu)勢？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="上?？諝忸A熱器制造商,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031435547/8438841.jpg"></div><p> 國內(nèi)部分進行煙氣脫硝改造機組對空預器低溫段元件鍍搪瓷，空預器冷段換熱元件即使采用鍍搪瓷元件，如果沒有有效的吹灰清洗裝置相配套，同樣會發(fā)生嚴重的堵灰。搪瓷鍍層能***降低***氫氨的結(jié)垢速率，但如鍍層因加工質(zhì)量而損裂，將不利于防止***氫氨的吸附。氨逃逸濃度過高氨逃逸濃度越大，空預器阻力增加的越快。煙氣脫硝裝置運行過程中，除了極端工況造成短時間內(nèi)過量噴氨外。當氨噴射系統(tǒng)設計不當、煙氣流場分布不均勻或者噴氨格柵局部噴嘴被堵塞時，也會造成反應器出口局部區(qū)域的氨逃逸過量。不同程度的氨逃逸是造成空預器堵塞的主要原因。對于煙氣脫硝裝置，除通過氨噴射系統(tǒng)、導流系統(tǒng)、混合系統(tǒng)的設計提高煙氣流場的分布均勻性外，日常運行過程中，還需嚴格控制噴氨量，防止過度噴氨，并定期進行氨噴射系統(tǒng)的噴氨流量平衡調(diào)整，防止局部噴氨過大造成氨逃逸濃度升高。3.空預器堵塞的預防為了更好地控制空預器堵塞情況，必須采取技術手段，杜絕空預器堵塞的原因，從根本上降低或者杜絕空預器堵塞情況發(fā)生。SCR超低排放前的一般手段冬季加強暖風器綜合治理利用停爐機會對暖風器進行改造，以徹底解決因暖風器疏水不暢通引起振動而引起內(nèi)漏?？煽紤]對暖風器進行改造。板式空氣預熱器有正反菱形波紋板。山西供暖空氣預熱器</p><p style="text-indent:25px">上海板式空氣預熱器廠家有哪些？上?？諝忸A熱器制造商</p><p> 底梁還通過底部軸承凳板支撐著空預器轉(zhuǎn)動部件的載荷。底梁還支撐端柱、底部扇形板和底部扇形板支板的重量。底部過渡煙風道的重量由底部結(jié)構(gòu)承受。底梁上的所有載荷分別由兩端傳遞到用戶鋼架上。7、頂部和底部三分倉結(jié)構(gòu)三分倉結(jié)構(gòu)包括三分倉扇形板和三分倉扇形板支板等，布置在轉(zhuǎn)子頂部和底部的空氣一側(cè)，內(nèi)緣對接在項、底結(jié)構(gòu)的扇形板和翼板上，外緣則焊接道支撐在轉(zhuǎn)子的外殼上的三分倉軸向密封板上。頂、底三分倉扇形板與三分倉軸向密封板一起，將空氣側(cè)分隔成一次風和二次風。8、過渡煙風道過渡煙風道位于轉(zhuǎn)子熱端和冷端的煙氣側(cè)和空氣側(cè)，其作用是將氣流導入和引出轉(zhuǎn)子。三分倉布置的風道又被進一步分為二次風道和一次風道。過渡煙風道連接在轉(zhuǎn)子外殼平板以及頂?shù)捉Y(jié)構(gòu)上。為保證空預器結(jié)構(gòu)合理受力，所有過渡煙風道內(nèi)均設置內(nèi)撐管。9、轉(zhuǎn)子驅(qū)動裝置轉(zhuǎn)子由中心驅(qū)動裝置驅(qū)動，驅(qū)動裝置直接與轉(zhuǎn)子頂部端軸相連。兩臺電機均能以正、反兩個方向驅(qū)動空預器，只有在空預器不帶負荷時才允許改變驅(qū)動方向。兩臺驅(qū)動電機與初級減速箱均為法蘭連接。終級減速箱通過輸出軸套直接套裝在驅(qū)動軸軸上并用鎖緊盤固定。終級減速箱一側(cè)裝有扭矩臂。上?？諝忸A熱器制造商</p><p style="text-indent:25px">上海板換機械設備有限公司致力于機械及行業(yè)設備，是一家生產(chǎn)型公司。公司自成立以來，以質(zhì)量為發(fā)展，讓匠心彌散在每個細節(jié)，公司旗下板式換熱器機組，可拆式板式換熱器，焊接式板式換熱器，板式空氣預熱器深受客戶的喜愛。公司秉持誠信為本的經(jīng)營理念，在機械及行業(yè)設備深耕多年，以技術為先導，以自主產(chǎn)品為重點，發(fā)揮人才優(yōu)勢，打造機械及行業(yè)設備良好品牌。上海板換憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務、眾多的成功案例積累起來的聲譽和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2508396.html</p></div></div></div></div></div><div id="onzlhdp" class="page-right twoColRt"><div id="gkrokbs" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="vugyulh" 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" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強信息推薦自業(yè)物資供應</p></a></div><div id="3hofwix" class="recomPic likePro"><a 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