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clearfix"><h1>四川空氣預(yù)熱器的用途和特點(diǎn) 推薦咨詢上海板換機(jī)械設(shè)備供應(yīng)</h1><div id="kqwf3ev" class="proBig"><div id="tef4wxo" 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="l22wjtu" 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="oefdo3r" 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>四川空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器</p><p><span>***更新：</span>2021-01-01 03:06:57</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="7ml9x7m" 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="2a7yzju" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="uvrfqqc" class="box"><p><p> 板式換熱器是由一系列具有一定波紋形狀的金屬片疊裝而成的一種換熱器。各種板片之間形成薄矩形通道，四川空氣預(yù)熱器的用途和特點(diǎn)，通過(guò)板片進(jìn)行熱量交換。板式換熱器是液—液、液—汽進(jìn)行熱交換的理想設(shè)備。它具有換熱效率高、熱損失小、結(jié)構(gòu)緊湊輕巧、占地面積小、應(yīng)用廣、使用壽命長(zhǎng)等特點(diǎn)。在相同壓力損失情況下，其傳熱系數(shù)比管式換熱器高3-5倍，占地面積為管式換熱器的三分之一，熱回收率可高達(dá)90%以上板片和墊片的四個(gè)角孔形成了流體的分配管和匯集管，同時(shí)又合理地將冷熱流體分開(kāi)，四川空氣預(yù)熱器的用途和特點(diǎn)，使其分別在每塊板片兩側(cè)的流道中流動(dòng)，通過(guò)板片進(jìn)行熱交換。[3]板式換熱器的優(yōu)化設(shè)計(jì)計(jì)算，就是在已知溫差比NTUE的條件下，合理地確定其型號(hào)、流程和傳熱面積，使NTUp等于NTUE。[4]板式換熱器基本組成結(jié)構(gòu)：⒈板式換熱器板片和板式換熱器密封墊片⒉固定壓緊板⒊活動(dòng)壓緊板⒋夾緊螺栓⒌上導(dǎo)桿⒍下導(dǎo)桿⒎后立柱板式換熱器特點(diǎn)編輯（板式換熱器與管殼式換熱器的比較）a.傳熱系數(shù)高；由于不同的波紋板相互倒置，構(gòu)成復(fù)雜的流道，使流體在波紋板間流道內(nèi)呈旋轉(zhuǎn)三維流動(dòng)，四川空氣預(yù)熱器的用途和特點(diǎn)，能在較低的雷諾數(shù)（一般Re=50~200）下產(chǎn)生紊流，所以傳熱系數(shù)高，一般認(rèn)為是管殼式的3~5倍。[2]b.對(duì)數(shù)平均溫差大，末端溫差小。在管殼式換熱器中?？諝忸A(yù)熱器的作用是使高溫?zé)煔饫鋮s，減少有害氣體排放。四川空氣預(yù)熱器的用途和特點(diǎn)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405032539062/8800983.jpg"></div><p> 投入暖風(fēng)器或熱風(fēng)再循環(huán)努力控制空預(yù)器綜合冷端溫度不低于目標(biāo)溫度?？疹A(yù)器出口綜合冷端溫度低于目標(biāo)值時(shí)，優(yōu)先采用降低磨煤機(jī)出口溫度，適當(dāng)增加一次風(fēng)比例（注意鍋爐燃燒和飛灰含碳量的變化情況），以提高空預(yù)器出口排煙溫度。空預(yù)器蒸汽吹灰疏水溫度控制在比吹灰母管壓力對(duì)應(yīng)的飽和溫度高5-20℃范圍內(nèi)，空預(yù)器實(shí)際排煙溫度高于目標(biāo)綜合冷端溫度時(shí)，取下限，否則取上限。安裝并運(yùn)行脫硝裝置的鍋爐，要防止局部或部分時(shí)段噴氨過(guò)量引起的氨逃逸量超標(biāo)(≯3ppm)。優(yōu)化鍋爐配風(fēng)，利用煙氣再循環(huán)，防止過(guò)氧（必要時(shí)根據(jù)CO生成量適度控制低氧）燃燒和爐膛局部溫度過(guò)高，減少爐內(nèi)SO3的生成。空預(yù)器煙氣側(cè)差壓超過(guò)設(shè)計(jì)值或空預(yù)器冷端溫度低于目標(biāo)溫度時(shí)，應(yīng)增加吹灰頻次，煙氣側(cè)差壓超過(guò)，提高空預(yù)器冷端吹灰器彈簧閥后壓力（比較高至）加強(qiáng)吹灰，當(dāng)差壓恢復(fù)正常值范圍內(nèi)，逐漸恢復(fù)正常吹灰壓力，防止吹損蓄熱元件。加強(qiáng)鍋爐暖風(fēng)器、熱風(fēng)再循環(huán)、空預(yù)器扇形板自動(dòng)調(diào)整裝置設(shè)備的運(yùn)行維護(hù)，保證設(shè)備運(yùn)行良好。暖風(fēng)器、鍋爐受熱面（特別是省煤器）泄漏后要及時(shí)隔離或停爐處理?？疹A(yù)器停爐進(jìn)行水沖洗后，啟動(dòng)點(diǎn)火前要充分烘干。要加強(qiáng)空預(yù)器進(jìn)出口差壓、溫度。新疆正規(guī)空氣預(yù)熱器板式空氣預(yù)熱器適合安裝空間有限的改造項(xiàng)目。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)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(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><p> 15、環(huán)向密封環(huán)向密封條安裝在轉(zhuǎn)子中心筒和轉(zhuǎn)子外緣角鋼的頂部和底部，其主要功能是阻斷因未經(jīng)過(guò)熱交換而影響空預(yù)器熱力性能的轉(zhuǎn)子外側(cè)的旁路氣流。此外，環(huán)向密封還有助于軸向密封，因此它降低了軸向密封片兩側(cè)壓差的大小。在轉(zhuǎn)子底部外緣，由。由于在滿負(fù)荷運(yùn)行時(shí)轉(zhuǎn)子向下變形，因此安裝該密封條時(shí)需預(yù)先考慮到這一間除要求。該密封條用螺母以及壓板固定。頂部環(huán)向密封由焊在轉(zhuǎn)子外殼上的密封條組成。在設(shè)置該密封條時(shí)應(yīng)預(yù)先考慮到滿負(fù)荷時(shí)轉(zhuǎn)子以及外殼的徑向變形差。內(nèi)緣環(huán)向密封條安裝在莊子中心筒的頂部和底部，與頂部和底部扇形板一起構(gòu)成密封對(duì)，通過(guò)螺栓與焊接在固定板內(nèi)側(cè)的螺母一起鎖定。16、轉(zhuǎn)子中心筒密封中心筒密封為雙密封布置，密封片安裝在扇形板上，與中心筒構(gòu)成密封對(duì)。內(nèi)側(cè)密封由兩個(gè)，兩個(gè)圓環(huán)之間用低碳鋼支撐環(huán)固定，內(nèi)側(cè)密封直接裝到扇形板上。為便于更換，內(nèi)側(cè)密封分作兩段安裝，可以直接進(jìn)行更換和安裝。外側(cè)密封為盤(pán)根填料密封。盤(pán)根填料座的支探板固定在扇形板的加強(qiáng)板上。盤(pán)根填料選為非石棉石墨**盤(pán)根，盤(pán)根耐熱溫度不低于500℃。盤(pán)根填料設(shè)為三層，截面為15mm×15mm。上述中心筒內(nèi)、外側(cè)密封之間的填料室設(shè)有一直接通向煙氣側(cè)的槽形管道。板式空氣預(yù)熱器有什么特點(diǎn)？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="四川空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039677734/951043.jpg"></div><p> ⒎不宜選用單板面積太小的板片，以免板片數(shù)量過(guò)多，板間流速偏小，降低傳熱系數(shù)。⒏板式換熱器的換熱介質(zhì)不宜為蒸汽。板式換熱器施工安裝要點(diǎn)編輯⒈換熱器不應(yīng)有變形，緊固件不應(yīng)有松動(dòng)或其它機(jī)械損傷。⒉設(shè)備吊裝時(shí)，吊繩不得掛在接管、定位橫梁或板片上。⒊換熱器周?chē)A(yù)留足夠空間，以便于檢修。⒋冷熱介質(zhì)進(jìn)出口接管安裝。應(yīng)按照出廠銘牌所規(guī)定方向連接。⒌連接換熱器的管道應(yīng)進(jìn)行清洗，防止砂石焊渣等雜物進(jìn)入換熱器，造成堵塞。⒍換熱器應(yīng)以比較大工作壓力的，蒸汽部分應(yīng)不低于蒸汽供汽壓力加；熱水部分應(yīng)不低于。板式換熱器執(zhí)行標(biāo)準(zhǔn)編輯產(chǎn)品標(biāo)準(zhǔn)：NB/T47004-2009《板式熱交換器》工程標(biāo)準(zhǔn)：GB50242-2016《建筑給水排水及采暖工程施工質(zhì)量驗(yàn)收規(guī)范》CJJ28-2014《城鎮(zhèn)供熱管網(wǎng)工程施工及驗(yàn)收規(guī)范》相關(guān)標(biāo)準(zhǔn)圖集：05R103《熱交換站工程設(shè)計(jì)施工圖集》板式換熱器清洗工藝編輯1．隔離設(shè)備系統(tǒng)。并將換熱器里面的水排放干凈。2．采用高壓水清洗管道內(nèi)存留的淤泥、藻類(lèi)等雜質(zhì)后，封閉系統(tǒng)。3．在隔離閥和交換器間裝上球閥（不小于1英寸=），進(jìn)水和回水口都應(yīng)安裝。4．接上輸送泵和連接導(dǎo)管，使清洗劑從換熱器的底部泵入，從頂部流出。5．開(kāi)始向換熱器里泵入所需要的清洗劑。板式空氣預(yù)熱器是一種節(jié)能設(shè)備。四川空氣預(yù)熱器的用途和特點(diǎn)</p><p style="text-indent:25px">板式空氣預(yù)熱器維修廠家有哪些？四川空氣預(yù)熱器的用途和特點(diǎn)</p><p> 因此，空預(yù)器堵塞的原因可以確定為因脫硝系統(tǒng)逃逸的氨與煙氣中的三氧化硫反應(yīng)生成***氫氨，并在空預(yù)器冷段沉積，造成空預(yù)器堵塞?？疹A(yù)器蓄熱元件清理方法空預(yù)器解體檢修后，按無(wú)脫硝系統(tǒng)運(yùn)行時(shí)的空預(yù)器清理方案，一般是進(jìn)行手工清理。由于無(wú)脫硝系統(tǒng)發(fā)生空預(yù)器積灰堵塞，均為干灰，人工用鋼絲刷等清理較為方便。但由脫硝系統(tǒng)運(yùn)行后，空預(yù)器堵塞物含***氫氨，質(zhì)地堅(jiān)硬，人工采用電動(dòng)鋼絲頭清理仍非常困難，現(xiàn)場(chǎng)處理經(jīng)驗(yàn)表明，清理一片蓄熱元件需45分鐘，不采取措施將嚴(yán)重拖延大修進(jìn)度?，F(xiàn)場(chǎng)通過(guò)用工業(yè)沖洗浸泡的方法仍不能提高清理速度，后采用化學(xué)溶液浸泡后，將元件盒解包，再用高壓水槍沖洗的方法，才有效解決清理的問(wèn)題。經(jīng)化學(xué)清洗后，冷端蓄熱元件均得到徹底清理。實(shí)踐經(jīng)驗(yàn)表明：對(duì)于給定的SO2濃度和溫度，就實(shí)際生成的SO3量而言，SO3的生成率幾乎不變。在脫硝過(guò)程中由于氨的不完全反應(yīng)，SCR煙氣脫硝過(guò)程發(fā)生氨逃逸是必然的，并且氨逃逸隨時(shí)間會(huì)發(fā)生變化，氨逃逸率主要取決于以下因素：(1)注入氨流量分布均勻情況；(2)設(shè)定的NH3/NOx摩爾比；(3)催化劑堵塞情況；(4)催化劑老化情況。反應(yīng)生成的SO3進(jìn)一步同煙氣中逃逸的氨反應(yīng)，生成***氫氨或***氨。四川空氣預(yù)熱器的用途和特點(diǎn)</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2650759.html</p></div></div></div></div></div><div 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