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clearfix"><h1>北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家服務(wù)為先上海板換機(jī)械設(shè)備供應(yīng)</h1><div id="zt7y9i9" class="proBig"><div id="pyqn8dx" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220410559414062/9489232.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="xhzw88a" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220410559414062/9489232.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="cbyf8nb" 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>北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家,空氣預(yù)熱器</p><p><span>***更新：</span>2021-01-18 04:05:34</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="2d3etcj" 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="7oyvceq" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="dsu3zw2" class="box"><p><p> 過剩空氣系數(shù)是燃料燃燒時實(shí)際空氣需要量與理論空氣需要量之比值，用“α”表示。計(jì)算公式：α＝()其中：，O2實(shí)測值為儀器測量煙道中的O2值舉例：鍋爐測試時O2實(shí)測值為13%，計(jì)算出的過剩空氣系數(shù)α＝(％)＝國標(biāo)規(guī)定過?？諝庀禂?shù)應(yīng)按α＝（燃煤鍋爐），α＝（燃油燃?xì)忮仩t）進(jìn)行折算。舉例：燃煤鍋爐，鍋爐測試時O2實(shí)測值為13%，SO2排放值500ppm，計(jì)算出的過?？諝庀禂?shù)α＝，那么根據(jù)國標(biāo)規(guī)定，折算后的SO2排放濃度＝SO2實(shí)測值×（α實(shí)際值/α國標(biāo)值）＝500ppm×（）=722ppm舉例：燃油燃?xì)忮仩t，北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家，鍋爐測試時O2實(shí)測值為13%，SO2排放值500ppm，計(jì)算出的過剩空氣系數(shù)α＝，北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家，那么根據(jù)國標(biāo)規(guī)定，折算后的SO2排放濃度＝SO2實(shí)測值×（α實(shí)際值/α國標(biāo)值）＝500ppm×（）=1083ppm空預(yù)器漏風(fēng)依據(jù)下列各式計(jì)算：α=21/21-o2Δα=α2-α1δ=，北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家。用板式空氣預(yù)熱器回收高溫?zé)煔鉄崮?，預(yù)熱廢氣溫度。北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220410559414062/9489232.jpg"></div><p> 比例可根據(jù)具體情況調(diào)整）。6．反復(fù)循環(huán)清洗到推薦的清洗時間。隨著循環(huán)的進(jìn)展和沉積物的溶解，反應(yīng)時產(chǎn)生的氣體也會增多，應(yīng)隨時通過放氣閥將多余的空氣排出。隨著空氣的排出，換熱器內(nèi)的空間會增大，可加入適當(dāng)?shù)乃?，不要一開始就注入大量的水，可能會造成水的溢出。7．循環(huán)中要定時檢查清洗劑的有效性?？梢允褂肞H試紙測定。如果溶液保持在PH值2‐3時，那么清洗劑仍然有效。如果清洗劑的PH值達(dá)到5‐6時，需要再添加適量清洗劑。**終溶液的PH值在2‐3時保持30分鐘沒有明顯變化，證明達(dá)到了清洗效果。注意：清洗劑可以回收后重復(fù)使用，排放會造成浪費(fèi)。8．達(dá)到清洗時間后，回收清洗溶液。并用清水反復(fù)沖洗交換器，直到?jīng)_洗干凈至中性，用PH試紙測定PH值6~7。9．完成清洗后既可開機(jī)運(yùn)行。也可以打壓試驗(yàn)，看是否有泄漏現(xiàn)象。如果有泄漏，可以采用高分子復(fù)合材料進(jìn)行修復(fù)保護(hù)。并且可以**延長設(shè)備的使用壽命。⒑設(shè)備穩(wěn)定后，記下當(dāng)前的介質(zhì)過流量、工作壓力、換熱效率等數(shù)據(jù)。⒒比較清洗前和清洗后數(shù)值的變化，就可以計(jì)算出該企業(yè)每個小時所節(jié)省的電費(fèi)、煤費(fèi)等生產(chǎn)費(fèi)用及提高的工作效率，這正是企業(yè)采用技術(shù)應(yīng)用的價值補(bǔ)償。黑龍江結(jié)構(gòu)緊湊空氣預(yù)熱器的用途和特點(diǎn)專業(yè)板式空氣預(yù)熱器廠家。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家,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(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(jì)算時，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，一般對壓降有一定的要求，所以應(yīng)對其進(jìn)行校核。如果校核壓降超過允許壓降，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(zhǔn)則關(guān)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(guān)于板式換熱器的選型軟件。 </p><p style="text-indent:25px"> 防止空預(yù)器堵灰、腐蝕措施適應(yīng)范圍：空預(yù)器堵灰、腐蝕嚴(yán)重的鍋爐技術(shù)原理與要點(diǎn)：空預(yù)器綜合冷端溫度（空預(yù)器進(jìn)口空氣溫度與煙氣出口平均溫度之和）對冷端結(jié)露和腐蝕、堵灰影響較大?？疹A(yù)器出口綜合冷端溫度如低于酸**溫度，空預(yù)器冷端很快就會積灰，一周內(nèi)就形成極難去除的板結(jié)垢。冷端溫度目標(biāo)值應(yīng)根據(jù)“綜合冷端溫度與燃料含硫量變化曲線”確定，并根據(jù)燃用煤種性質(zhì)進(jìn)行修正，除收到基全硫（St,ar）＜，燃用其他煤種原則上不要低于130℃。煙氣酸**主要受燃煤中的硫分、灰分、灰成分（特別是灰中Ca含量）、水分和發(fā)熱量的影響，灰分和灰中Ca含量越高，酸**越低；硫分和水分越高，酸**越高。由于不同酸**計(jì)算經(jīng)驗(yàn)公式計(jì)算出的數(shù)值偏差較大，對燃用煤種相對穩(wěn)定的鍋爐，應(yīng)通過調(diào)整冷端溫度觀察空預(yù)器差壓變化趨勢等方法，確定該煤種對應(yīng)的目標(biāo)綜合溫度控制值，并根據(jù)空預(yù)器煙氣側(cè)差壓變化情況及時提高空預(yù)器冷端溫度控制值。為提高控制精度和減輕運(yùn)行人員調(diào)整工作量，空預(yù)器綜合冷端溫度控制目標(biāo)值建議通過原煙氣SO2濃度、燃煤量、煙氣量等參數(shù)實(shí)時計(jì)算并參與自動調(diào)節(jié)。機(jī)組啟/停階段要注重冷端溫度控制。板式空氣預(yù)熱器每個模塊均自帶外框架。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220415160732422/6470394.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。空預(yù)器出口綜合冷端溫度低于目標(biāo)值時，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，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段噴氨過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)，防止過氧（必要時根據(jù)CO生成量適度控制低氧）燃燒和爐膛局部溫度過高，減少爐內(nèi)SO3的生成。空預(yù)器煙氣側(cè)差壓超過設(shè)計(jì)值或空預(yù)器冷端溫度低于目標(biāo)溫度時，應(yīng)增加吹灰頻次，煙氣側(cè)差壓超過，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）泄漏后要及時隔離或停爐處理?？疹A(yù)器停爐進(jìn)行水沖洗后，啟動點(diǎn)火前要充分烘干。要加強(qiáng)空預(yù)器進(jìn)出口差壓、溫度。板式空氣預(yù)熱器便于清潔維護(hù)。山西壓降低空氣預(yù)熱器生產(chǎn)廠家</p><p style="text-indent:25px">板式空氣預(yù)熱器適用哪些工況？北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家</p><p style="text-indent:25px"> 隨國家節(jié)能減排工作的不斷深入，新版《火電廠大氣污染物排放標(biāo)準(zhǔn)》（GB13223-2011）要求，NOx排放限值為100mg/Nm3。現(xiàn)在燃煤鍋爐均已安裝脫硝系統(tǒng)，其中絕大部分采用SCR脫硝方式，SCR脫硝方式運(yùn)行中必然發(fā)生部分氨逃逸。2013年11月份起，空預(yù)器差壓逐漸增大，至2014年3月份，在負(fù)荷到270MW時，空預(yù)器差壓比較大達(dá)：從空預(yù)器差壓發(fā)展可看出，堵塞具有如下特點(diǎn)：（1）A空預(yù)器堵塞情況較輕，B空預(yù)器堵塞較嚴(yán)重；（2）堵塞發(fā)展很快，2013年11月20日，負(fù)荷280MW時，A、B側(cè)空預(yù)器煙氣差壓*分別為、，到4個月后，2014年3月27日煙氣差壓已達(dá)到。其中特別是B側(cè)空預(yù)器，堵塞明顯嚴(yán)重，造成B側(cè)煙氣流量減少。因而A引風(fēng)機(jī)煙氣通流量加大，電流明顯上升，由134A上升到160A。（3）B空預(yù)器旋轉(zhuǎn)一圈的情況下，差壓呈周期性變化，比較大達(dá)kPa，**小達(dá)kPa，說明B空預(yù)器局部堵塞嚴(yán)重。即便以**小值比較，堵塞現(xiàn)象也較為明顯?？疹A(yù)器解體后堵塞情況2014年4月大修期間，解體空預(yù)器蓄熱元件，發(fā)現(xiàn)堵塞情況主要集中冷段蓄熱元件約350mm以下部位，且堵塞物較硬。堵塞物化學(xué)分析空預(yù)器冷端冷端密封板上均為結(jié)晶樣顆粒，且結(jié)晶物較為堅(jiān)硬?？疹A(yù)器運(yùn)行半年后阻力增加約50%，對引風(fēng)機(jī)也會造成較大影響。北京傳熱系數(shù)高空氣預(yù)熱器生產(chǎn)廠家</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2894887.html</p></div></div></div></div></div><div id="laszgsp" class="page-right twoColRt"><div id="t2df7r8" class="box01 margin10 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