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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="clxprdp" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031435547/8438841.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="7ar3l3b" 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>福建石化空氣預熱器,空氣預熱器</p><p><span>***更新：</span>2020-08-30 13:06:54</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="7rt88px" 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="8877lb7" class="page-proshow02"><p class="title">詳細說明</p><div id="gzgdfm2" class="box"><p><p> 空預器吹灰壓力、疏水溫度，脫硝催化劑出口氨逃逸等表計的檢測維護，保證指示準確?？疹A器檢修中要通過校直大軸、修復密封片，福建石化空氣預熱器、利用新型密封技術(shù)等降低空預器漏風率，提高空預器出口排煙溫度。C級及以上計劃檢修時，根據(jù)空預器腐蝕、積灰情況把蓄熱元件拆包徹底清洗，冷，福建石化空氣預熱器、熱端蓄熱元件復裝時調(diào)換位置使用。部分電廠聘請專業(yè)清洗公司用高壓射流清洗車對空預器蓄熱元件在不吊出的情況下進行沖洗。空預器堵塞嚴重的，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），或進行空預器增加直徑改造。投用暖風器或熱風再循環(huán)系統(tǒng)，將對機組經(jīng)濟性產(chǎn)生不利影響，福建石化空氣預熱器，機組煤耗將上升1-3g/kWh，因此，在冷端綜合溫度（或冷端平均溫度）滿足要求的情況下，應及時停用暖風器或熱風再循環(huán)系統(tǒng)，防止過量投入造成能耗增加。板式空氣預熱器怎么維修？福建石化空氣預熱器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建石化空氣預熱器,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031435547/8438841.jpg"></div><p> 本起空預器堵塞事件中B側(cè)空預器發(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流板，說明，B側(cè)脫硝因少裝一級導流板，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。**終導致B側(cè)脫硝局部氨逃逸率超標幅度增加，造成B側(cè)空預器堵塞更嚴重。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器蓄熱元件的表面，使蓄熱元件積灰，空預器流通截面減小、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***氫氨在空預器換熱元件上的形成速率。福建石化空氣預熱器板式空氣預熱器是一種鋼鐵行業(yè)經(jīng)常使用的節(jié)能、環(huán)保設(shè)備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建石化空氣預熱器,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220415160732422/6470394.jpg"></div><p> 空氣預熱器漏風主要可以分為以下兩類:(1)攜帶漏風。攜帶漏風主要是因為空氣預熱器在轉(zhuǎn)動過程中,一部分駐留在換熱元件中的空氣被攜帶到煙氣中去,一部分駐留在換熱元件中的煙氣被攜帶到空氣中去。這種情況造成的漏風量很小,但這種漏風是空氣預熱器的構(gòu)造無法避免的。(2)直接漏風。直接漏風主要是由于空氣預熱器結(jié)構(gòu)本身為保證安全運行而使煙氣與空氣之間存在一定的間隙;同時,由于煙氣和空氣之間存在壓差也會產(chǎn)生漏風。對于三分倉空氣預熱器，它不但有空氣區(qū)與煙氣區(qū)之間的間隙漏風，還有一次風倉與二次風倉之間漏風。此外，外界的空氣也可以通過轉(zhuǎn)軸和機殼之間的間隙漏入煙氣區(qū)。直接漏風主要包括徑向漏風、軸向漏風、環(huán)向漏風。徑向漏風占直接漏風量的2/3左右,主要是因為轉(zhuǎn)子上、下端溫度差異而發(fā)生蘑菇狀變形,進而造成密封間隙的增大和漏風率的增加；其次環(huán)向的密封間隙漏風，**小的是軸向風。在間隙及漏風通流面積相同條件下冷端漏風量較熱端大。為了減小漏風，回轉(zhuǎn)式空氣預熱器均裝有密封裝置，主要有徑向密封、軸向密封、和環(huán)向密封。徑向密封：用以防止和減少空預器中空氣沿轉(zhuǎn)子的上、下端面通過徑向間隙漏到煙氣區(qū)的漏風量。</p><p> 焊接板式換熱器又分為：半焊接板式換熱器、全焊接板式換熱器、板殼式換熱器、釬焊板式換熱器。經(jīng)常用到的分類還有以下：1根據(jù)單位空間內(nèi)的換熱面積的多少，板式換熱器屬于緊湊式換熱器，主要是與管殼式換熱器進行比較，傳統(tǒng)的管殼式換熱器占地較大。2根據(jù)工藝用途，又有不同的叫法：板式加熱器、板式冷卻器、板式冷凝器、板式預熱器；3根據(jù)流程組合，分為單程板式換熱器和多程板式換熱器。4根據(jù)兩種介質(zhì)的流動方向，分為順流（并流）板式換熱器、逆流板式換熱器、交叉流（橫流）板式換熱器，后兩者用的比較多；5按照流道的間隙大小，分為常規(guī)間隙板式換熱器和寬間隙板式換熱器；6按照波紋，板式換熱器有更詳細的分別，不再累述，請參考：板式換熱器板片波紋形式。7按照是否是成套產(chǎn)品，可分為單機板式換熱器、板式換熱器機組。板式換熱器選型計算編輯板型選擇板片型式或波紋式應根據(jù)換熱場合的實際需要而定。對流量大允許壓降小的情況，應選用阻力小的板型，反之選用阻力大的板型。根據(jù)流體壓力和溫度的情況，確定選擇可拆卸式，還是釬焊式。確定板型時不宜選擇單板面積太小的板片，以免板片數(shù)量過多，板間流速偏小，傳熱系數(shù)過低，對較大的換熱器更應注意這個問題。板式空氣預熱器不易積灰結(jié)垢。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="福建石化空氣預熱器,空氣預熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220412821406250/101176.jpg"></div><p> 轉(zhuǎn)子隔倉由中心筒和外部分倉組成。轉(zhuǎn)子中心筒包括中心筒輪轂和內(nèi)部分倉，其中轉(zhuǎn)子主徑向隔板與中心筒輪轂連為一體。從中心筒向外延伸的主徑向隔板將轉(zhuǎn)子分為24倉，這些分倉又被二次徑向隔板分隔呈48倉。主徑向隔板和二次徑向隔板之間的環(huán)向隔板起加強轉(zhuǎn)子結(jié)構(gòu)和支撐換熱元件盒的作用。轉(zhuǎn)子與換熱元件等轉(zhuǎn)動件的全部重量由底部的球面滾子軸承支撐，而位于頂部的球面滾子導向軸承則用來承受徑向水平載荷。三分倉設(shè)計的空預器通過有三種不同的氣流，即煙氣、二次風和一次風。煙氣位于轉(zhuǎn)子的一側(cè)，而相對的另一側(cè)為二次風側(cè)和一次風側(cè)。上述三種氣流之間各由三組扇形板和軸向密封板相互隔開。煙氣和空氣流向相反，即煙氣向下、一次風和二次風向上。通過改變扇形板和軸向密封板的寬度可以實現(xiàn)雙密封和三密封，以滿足對空預器總漏風率和一次風漏風率的要求。3、轉(zhuǎn)子外殼轉(zhuǎn)子外殼封閉轉(zhuǎn)子并構(gòu)成空預器的一部分，由低碳鋼板制成。轉(zhuǎn)子外殼由六個部分現(xiàn)場組裝而成正八面**于兩個端柱之間。端柱兩側(cè)的轉(zhuǎn)子外殼由四套鉸鏈側(cè)柱支撐在用戶鋼架上，鉸鏈側(cè)柱的布置角考慮到了轉(zhuǎn)子外殼和鉸鏈側(cè)柱能沿空預器中心向外自由、均勻膨脹。專業(yè)生產(chǎn)板式空氣預熱器廠家。福建石化空氣預熱器</p><p style="text-indent:25px">板式空氣預熱器每個模塊均自帶外框架。福建石化空氣預熱器</p><p> 技術(shù)領(lǐng)域本實用新型涉及電站鍋爐空預器運行安全技術(shù)領(lǐng)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(shù)：目前，部分燃煤鍋爐排煙溫度低于設(shè)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、煙氣余熱的能級降低、引風機電耗增大等問題。尤其針對裝設(shè)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(shè)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(shù)實現(xiàn)要素：本實用新型為了彌補現(xiàn)有技術(shù)的不足，提供了一種結(jié)構(gòu)簡單、設(shè)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(shù)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，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。福建石化空氣預熱器</p><p style="text-indent:25px">上海板換機械設(shè)備有限公司創(chuàng)立于2005-11-30，是一家生產(chǎn)型公司。公司業(yè)務分為板式換熱器機組，可拆式板式換熱器，焊接式板式換熱器，板式空氣預熱器等，目前不斷進行創(chuàng)新和服務改進，為客戶提供質(zhì)量的產(chǎn)品和服務。公司秉持誠信為本的經(jīng)營理念，在機械及行業(yè)設(shè)備深耕多年，以技術(shù)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(shè)備質(zhì)量品牌。在社會各界的鼎力支持下，持續(xù)創(chuàng)新，不斷鑄造***服務體驗，為客戶成功提供堅實有力的支持。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/1094532.html</p></div></div></div></div></div><div id="2xtqnuw" class="page-right twoColRt"><div id="qam2fgn" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="hbyfrya" 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="ey24lse" class="recomPic likePro"><a 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