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src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031093750/2889219.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="banf23t" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031093750/2889219.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="tnas44x" 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>四川空氣預(yù)熱器電話,空氣預(yù)熱器</p><p><span>***更新：</span>2020-06-15 04:16:04</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="kzrjdvn" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海板換機(jī)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(jī): </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="pzr3bce" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="h8mgzls" class="box"><p><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(yán)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(yán)重，進(jìn)一步檢查發(fā)現(xiàn)B進(jìn)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(jìn)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(yán)重。4結(jié)論為提高SCR脫硝工藝脫硝效率，四川空氣預(yù)熱器電話，四川空氣預(yù)熱器電話，四川空氣預(yù)熱器電話，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?？赏ㄟ^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(fù)荷下的運(yùn)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。板式空氣預(yù)熱器使用在鋼鐵行業(yè)的煉鋼爐。四川空氣預(yù)熱器電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器電話,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031093750/2889219.jpg"></div><p> 通過調(diào)節(jié)固定在頂部結(jié)構(gòu)上的螺栓和支臂的相對位置來改變轉(zhuǎn)子頂部軸承中心的位置，從而達(dá)到調(diào)整轉(zhuǎn)子中心線位置的目的。頂部軸承支臂與頂部結(jié)構(gòu)用8個鎖緊螺栓和上下墊板定位固足，待頂部軸承位置**終調(diào)整就位后，即可將上述墊板與頂部結(jié)構(gòu)的翼板焊在一起。頂部軸承采用油浴潤滑，潤滑油等級與底部推力軸承相同。頂部軸承箱上有加油孔、注油器、油位計、呼吸器和放油塞。另外還設(shè)有用于安裝測溫元件的1/2”BSP螺紋孔。12、轉(zhuǎn)子密封系統(tǒng)空預(yù)器的密封系統(tǒng)由轉(zhuǎn)子徑向、軸向、環(huán)向以及轉(zhuǎn)子中心筒密封組成。13、徑向密封徑向密封片安裝在轉(zhuǎn)子徑向隔板的上、下緣。密封片由，與6mm厚的低碳鋼壓板一起通過自鎖螺母固定在轉(zhuǎn)子隔板上。所有密封片均設(shè)計呈單片直葉型．徑向密封片用來減小空氣到煙氣的直接漏風(fēng)。14、軸向密封軸向密封片和徑向密封片一起，用于減小轉(zhuǎn)子和密封擋板之間的間隙。軸向密封片由，安裝在轉(zhuǎn)子徑向隔板的垂直外緣處，其冷態(tài)位置的設(shè)定應(yīng)保證鍋爐帶負(fù)荷運(yùn)行以及停爐時無冷風(fēng)時與軸向密封板之間保持**小的密封間隙。軸向密封的固定方式與徑向密封片相同。軸向密封片供貨時兩端均留有修整余量，現(xiàn)場可根據(jù)轉(zhuǎn)子外緣角鋼**終的實(shí)際位置進(jìn)行栽切。天津空氣預(yù)熱器聯(lián)系方式板式空氣預(yù)熱器適用哪些工況？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器電話,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220411145419922/7208407.jpg"></div><p> 在選擇傳熱元件時，要考慮到用戶的實(shí)際情況，從設(shè)備長期安全穩(wěn)定運(yùn)行的角度出發(fā)，適應(yīng)煤種在一定范圍內(nèi)的變化，確保在使用過程中不堵灰，保持較低的排煙溫度，保證在長時間的運(yùn)行過程中，鍋爐的效率保持在較高水平。而不是像某些公司一樣，*考慮單一設(shè)計煤種，在燃料變化后，無法滿足機(jī)組經(jīng)濟(jì)、穩(wěn)定和安全運(yùn)行的需要。元件板型的選擇需同時考慮傳熱效果、流通阻力和堵灰可能三個因素。采用傳熱效果好的傳熱元件能降**造成本，但是不一定流通阻力小或耐堵灰，造成運(yùn)行成本上升。例如某公司在預(yù)熱器冷段采用HS7、HS8等DU系列波形元件，雖然預(yù)熱器轉(zhuǎn)子重量變輕，但是當(dāng)燃料灰分變多，或用于SCR預(yù)熱器時，很容易造成堵灰，使阻力上升。傳熱效果和流通阻力往往構(gòu)成一對矛盾，因?yàn)樘岣邠Q熱效果是通過加強(qiáng)氣流通道的局部紊流狀況，即加大換熱表面波紋密度或傾斜角，但這種方式也同時加大了流通阻力系數(shù)。本著對用戶負(fù)責(zé)的態(tài)度，在選用波形和煤種的匹配上，在傳熱元件的選擇上的做法是根據(jù)燃料的特性選擇合適的傳熱元件板型，通常在預(yù)熱器熱段和中溫段選擇DU3、DN、DL等波型傳熱元件，匹配從無煙煤到褐煤燃料。</p><p> 工業(yè)生產(chǎn)過程中會產(chǎn)生大量的廢氣以及乙二醇、一氧化碳、二氧化硫、碳?xì)浠衔锏葘θ梭w有害的物質(zhì)。將乙二醇廢氣通入450~700℃溫度范圍的燃燒裝置中，將廢氣充分燃燒，以達(dá)到廢氣外排的標(biāo)準(zhǔn)。為充分利用系統(tǒng)中煙氣的余熱，焚燒爐前設(shè)有煙氣-廢氣換熱器，用以回收高溫?zé)煔鉄崮埽A(yù)熱廢氣溫度。由于煤氣的特殊性質(zhì)，換熱器必須保證0泄露；煤氣預(yù)熱器運(yùn)行壓力通常在10kpa左右，因此設(shè)計壓力一般為20kpa；高爐煤氣含硫量較低，一般煙氣酸**溫度在100℃左右，換熱器低溫段需使用空氣膜技術(shù)提升壁溫，避免可能的酸**腐蝕；設(shè)計時應(yīng)注意兩臺換熱器熱側(cè)阻力分配。平板板型可以使用空氣膜技術(shù)，提高系統(tǒng)安全性；平板定距柱式設(shè)計可以靈活控制設(shè)計流速及阻力損失；流場分布均勻，不易積灰結(jié)垢，便于清潔維護(hù)；占地面積小，尤其適合安裝空間有限的改造項(xiàng)目。板式空氣預(yù)熱器使用在裂解爐。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器電話,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.jpg"></div><p> 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(jìn)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(jìn)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(jī)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(yùn)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(jī)組無LCS（間隙自調(diào)裝置）時熱端效果不明顯；運(yùn)行時間長后接觸式密封片易磨損失效。加壓密封技術(shù)：通常用于GGH，即GGH的低泄漏風(fēng)系統(tǒng)。綜合性密封技術(shù)：部分廠家綜合以上多種技術(shù)的特點(diǎn)，對空預(yù)器徑向、軸向、周向（旁路）密封和相關(guān)靜密封進(jìn)行針對性設(shè)計，實(shí)施漏風(fēng)率控制；1）運(yùn)行調(diào)節(jié)及維護(hù)注意事項(xiàng)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(yù)熱器的作用是提高燃燒空氣溫度。天津空氣預(yù)熱器聯(lián)系方式</p><p style="text-indent:25px">板式空氣預(yù)熱器適合安裝空間有限的改造項(xiàng)目。四川空氣預(yù)熱器電話</p><p> 高爐煤氣是冶金聯(lián)合企業(yè)主要的副產(chǎn)廢氣，經(jīng)過凈化處理，是一種輸送和使用方便、燃燒后又無需排渣和除塵的質(zhì)量環(huán)保能源，我國大部分的冶金企業(yè)都采取了煤氣回收利用措施，但隨著高爐原料條件的改善和裝備水平的提高，高爐煤氣的發(fā)熱值越來越低（大型高爐煤氣熱值已降到3140kJ/m3，中小高爐分別降到3340~3550kJ/m3和3760~3970kJ/m3），因此如何有效提高高爐風(fēng)溫成為一個重要課題。高爐熱風(fēng)爐采用空氣、煤氣雙預(yù)熱是提高風(fēng)溫的有效途徑。燃燒單一高爐煤氣（熱值3369kJ/m3），不預(yù)熱時，其理論燃燒溫度只有1280℃；只預(yù)熱空氣到250℃時，其理論燃燒溫度提高到1330℃；而空氣、煤氣雙預(yù)熱到170℃時，能提高到1380℃。u工藝：利用300℃左右的煙氣分別預(yù)熱助燃空氣、高爐煤氣至約150℃。四川空氣預(yù)熱器電話</p><p style="text-indent:25px">上海板換機(jī)械設(shè)備有限公司位于上海市，注冊資本5000萬元-1億元，旗下?lián)碛?01~300人***專業(yè)的員工。致力于創(chuàng)造***的產(chǎn)品與服務(wù)，以誠信、敬業(yè)、進(jìn)取為宗旨，以建上海板換明星產(chǎn)品為目標(biāo)，努力打造成為同行業(yè)中具有影響力的企業(yè)。公司堅持以客戶為中心、化工設(shè)備、環(huán)保設(shè)備及配件的制造加工及銷售，機(jī)械設(shè)備設(shè)計安裝（除特種設(shè)備外），在金山區(qū)山陽鎮(zhèn)山寧路99號內(nèi)從事自有房屋租賃?！疽婪毥?jīng)批準(zhǔn)的項(xiàng)目，經(jīng)相關(guān)部門批準(zhǔn)后方可開展經(jīng)營活動】。主要生產(chǎn)制造的產(chǎn)品包括可拆卸板式熱交換器、寬通道全焊接板式熱交換器、煙氣冷凝器、板式空氣預(yù)熱器、TP焊接換熱器、板框式熱交換器等。市場為導(dǎo)向，重信譽(yù)，保質(zhì)量，想客戶之所想，急用戶之所急，全力以赴滿足客戶的一切需要。上海板換機(jī)械設(shè)備有限公司主營業(yè)務(wù)涵蓋[ "板式換熱器機(jī)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" ]，堅持“質(zhì)量***、質(zhì)量服務(wù)、顧客滿意”的質(zhì)量方針，贏得廣大客戶的支持和信賴。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/263085.html</p></div></div></div></div></div><div id="khewtl7" class="page-right twoColRt"><div id="on7d2ho" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="g7rzwog" class="recomPic likePro"><a 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