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tcPro"><section class="home-main container clearfix"><div id="3a3ysol" class="twoCol"><div id="5b4fceg" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁(yè)?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_jxjxysb/">機(jī)械及行業(yè)設(shè)備</a>?<a href="http://www.cdcfah.com/cp/second-jxjxysb_crsbje/">傳熱設(shè)備</a>?<a href="http://www.cdcfah.com/cp/third-crsbje_qtcrsbpw/">其他傳熱設(shè)備</a>?青海空氣預(yù)熱器制造商上海板換機(jī)械設(shè)備供應(yīng)</p><div id="xwt8v8d" class="leftbox clearfix"><h1>青?？諝忸A(yù)熱器制造商上海板換機(jī)械設(shè)備供應(yīng)</h1><div id="zjvkgdp" class="proBig"><div id="t7hzwik" 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="kz77slc" 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="pzwol83" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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>青海空氣預(yù)熱器制造商</p><p><span>***更新：</span>2020-06-18 08:25:04</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="jya734c" 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?jiān)浦?/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(yáng)鎮(zhèn)山寧路99號(hào)</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="qv7uba2" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="cb3tq7l" class="box"><p><p> 空氣預(yù)熱器換熱原理空氣預(yù)熱器是布置在尾部煙道上利用排煙余熱將空氣預(yù)熱到所需溫度的熱交換器。當(dāng)空預(yù)器換熱元件經(jīng)過(guò)煙氣側(cè)時(shí)，煙氣攜帶的一部分熱量就傳遞給換熱元件；而換熱元件經(jīng)過(guò)空氣側(cè)時(shí)又把熱量傳遞給空氣。這樣空預(yù)器回收了煙氣的熱量，降低了排煙溫度，提高了燃料與空氣的初始溫，強(qiáng)化了燃料的燃燒，因而進(jìn)一步提高了鍋爐效率。換熱元件換熱元件由薄鋼板制成，一片波紋板上有斜波．另一片上除了方向不同的斜波外還有直槽，帶斜波的波紋板和帶有斜波和直槽的定位板交替層疊．直槽與轉(zhuǎn)子軸線方向平行布置、使波紋板和定位板之間保持適當(dāng)?shù)募措x。斜波與直槽呈30o夾角．使得空氣或煙氣流經(jīng)換熱元件時(shí)形成較大的紊流，以改換換熱效果。由于冷端（即煙氣出口端和空氣入口端）受溫度和燃燒條件的影響**易腐蝕，因而換熱元件分層布置，其中，熱端和中溫段換熱元件由低碳鋼制成，而冷端換熱元件則由等同考登鋼制成。換熱元件均裝在元件盒內(nèi)以便于安裝和取出。其中，青海空氣預(yù)熱器制造商，熱端和中溫段換熱元件垂直向上抽取。熱端：厚，深350mm，低碳鋼中溫端：厚，青?？諝忸A(yù)熱器制造商，深1000mm，低碳鋼冷端：厚，深950mm，青?？諝忸A(yù)熱器制造商，等同烤登鋼2、轉(zhuǎn)子連在中心筒輪轂上的低碳鋼主隔板為轉(zhuǎn)子的基本構(gòu)架。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青海空氣預(yù)熱器制造商" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.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(dòng)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(dòng)通道。一般情況下，將若干個(gè)流道按并聯(lián)或串聯(lián)的方式連接起來(lái)，以形成冷、熱介質(zhì)通道的不同組合。流程組合形式應(yīng)根據(jù)換熱和流體阻力計(jì)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(duì)流換熱系數(shù)相等或接近，從而得到比較好的傳熱效果。因?yàn)樵趥鳠岜砻鎯蓚?cè)對(duì)流換熱系數(shù)相等或接近時(shí)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(jì)算時(shí)，仍以平均流速進(jìn)行計(jì)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(shè)計(jì)選型時(shí)，一般對(duì)壓降有一定的要求，所以應(yīng)對(duì)其進(jìn)行校核。如果校核壓降超過(guò)允許壓降，需重新進(jìn)行設(shè)計(jì)選型計(jì)算，直到滿足工藝要求為止。計(jì)算方法關(guān)于傳熱系數(shù)和壓降的計(jì)算，由各個(gè)廠家產(chǎn)品的性能曲線計(jì)算得到。性能曲線（準(zhǔn)則關(guān)聯(lián)式）一般來(lái)自于產(chǎn)品的性能測(cè)試。對(duì)于缺少性能測(cè)試的板型，也可通過(guò)參考尺寸法，根據(jù)板型的特性幾何尺寸獲得板型的準(zhǔn)則關(guān)聯(lián)式，國(guó)際上的一些通用軟件均采用這種方法。選型軟件關(guān)于板式換熱器的選型軟件。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青?？諝忸A(yù)熱器制造商" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039677734/951043.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(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(shí)少安裝一級(jí)導(dǎo)流板，說(shuō)明，B側(cè)脫硝因少裝一級(jí)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(chǎng)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(chǎng)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，NH3/NOx摩爾比通?？刂茷榇笥?，因此脫硝過(guò)程氨逃逸不可避免。SCR脫硝過(guò)程使用的釩基催化劑會(huì)對(duì)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(huì)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^(guò)控制SCR脫硝過(guò)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(shí)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><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/299445.html</p></div></div></div></div></div><div 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