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服務(wù)為先上海板換機(jī)械設(shè)備供應(yīng)</p><div id="qkhg7mj" class="leftbox clearfix"><h1>浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn) 服務(wù)為先上海板換機(jī)械設(shè)備供應(yīng)</h1><div id="icum97y" class="proBig"><div id="x2rjdkr" class="bigimg"><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 id="vzwt9fb" 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="bfszjfh" 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>浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器</p><p><span>***更新：</span>2021-01-20 15:11:14</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="bproij7" 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="eikr2ce" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="hvnkzvs" class="box"><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，浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)?？疹A(yù)器蓄熱元件清理方法空預(yù)器解體檢修后，按無脫硝系統(tǒng)運(yùn)行時的空預(yù)器清理方案，一般是進(jìn)行手工清理。由于無脫硝系統(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)地堅硬，人工采用電動鋼絲頭清理仍非常困難，現(xiàn)場處理經(jīng)驗表明，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)場通過用工業(yè)沖洗浸泡的方法仍不能提高清理速度，浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)，后采用化學(xué)溶液浸泡后，浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)，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)驗表明：對于給定的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。在脫硝過程中由于氨的不完全反應(yīng)，SCR煙氣脫硝過程發(fā)生氨逃逸是必然的，并且氨逃逸隨時間會發(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。板式空氣預(yù)熱器每個模塊均自帶外框架。浙江安全可靠空氣預(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="浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031093750/2889219.jpg"></div><p style="text-indent:25px"> 空氣預(yù)熱器就是鍋爐尾部煙道中的煙氣通過內(nèi)部的散熱片將進(jìn)入鍋爐前的空氣預(yù)熱到一定溫度的受熱面，是一種用于提高鍋爐的熱交換性能，降低能量消耗的設(shè)備。空氣預(yù)熱器一般分為板式、回轉(zhuǎn)式和管式三種。以回轉(zhuǎn)式為例介紹了空氣預(yù)熱器的工作原理。大量未燃盡的可燃物會沉積在傳熱元件上可能空預(yù)器著火，因此對其著火原因進(jìn)行了分析，并著火原因及應(yīng)對措施進(jìn)行了詳細(xì)說明；還詳細(xì)介紹了掉閘分析以及漏風(fēng)治理。多用于燃煤電站鍋爐?？煞譃楣芟涫健⒒剞D(zhuǎn)式兩種，其中回轉(zhuǎn)式又分為風(fēng)罩回轉(zhuǎn)式和受熱面回轉(zhuǎn)式兩種。電站鍋爐較常采用受熱面回轉(zhuǎn)式預(yù)熱器。在鍋爐中的應(yīng)用一般為兩分倉、三分倉、四分倉式，其中四分倉較常用于循環(huán)流化床鍋爐中。黑龍江安全可靠空氣預(yù)熱器生產(chǎn)廠家板式空氣預(yù)熱器哪家好？</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江安全可靠空氣預(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> 空預(yù)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(hù)，保證指示準(zhǔn)確?？疹A(yù)器檢修中要通過校直大軸、修復(fù)密封片、利用新型密封技術(shù)等降低空預(yù)器漏風(fēng)率，提高空預(yù)器出口排煙溫度。C級及以上計劃檢修時，根據(jù)空預(yù)器腐蝕、積灰情況把蓄熱元件拆包徹底清洗，冷、熱端蓄熱元件復(fù)裝時調(diào)換位置使用。空預(yù)器堵塞嚴(yán)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(jìn)行大通道蓄熱元件換型改造（改成L型直通道），或進(jìn)行空預(yù)器增加直徑改造。投用暖風(fēng)器或熱風(fēng)再循環(huán)系統(tǒng)，將對機(jī)組經(jīng)濟(jì)性產(chǎn)生不利影響，機(jī)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(yīng)及時停用暖風(fēng)器或熱風(fēng)再循環(huán)系統(tǒng)，防止過量投入造成能耗增加?？疹A(yù)器在線高壓水沖洗案例：2012年11月，珞璜電廠在#5爐（600MW）運(yùn)行中成功進(jìn)行了空預(yù)器冷端傳元熱件在線高壓水沖洗，取得成效。在《火力發(fā)電機(jī)節(jié)能降耗技術(shù)導(dǎo)則》、《300MW鍋爐及輔機(jī)節(jié)能降耗技術(shù)導(dǎo)則》和《燃煤電廠節(jié)能降耗技術(shù)推廣應(yīng)用目錄》推薦的相關(guān)技術(shù)基礎(chǔ)上，對空預(yù)器密封治理的相關(guān)技術(shù)和注意事項進(jìn)行介紹：（1）密封方式簡介1)雙道密封改造：將轉(zhuǎn)子隔倉數(shù)增加一倍，通常由24分倉改為48分倉。 </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℃。上海板換機(jī)械設(shè)備有限公司專業(yè)生產(chǎn)板式空氣預(yù)熱器設(shè)備。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn),空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220411145419922/7208407.jpg"></div><p style="text-indent:25px"> 高壓水沖洗要徹底空預(yù)器沖洗熱段一般采用消防水噴淋，冷端采用高壓水***沖洗，通過抽檢中溫端換熱元件干凈程度以確定沖洗質(zhì)量是否合格，正常兩臺空預(yù)器沖洗合格需要進(jìn)行60小時左右。沖洗結(jié)束后一定要進(jìn)行充分干燥，防止啟動時大量灰粒粘貼到換熱元件。SCR**排放后的預(yù)防手段合理控制噴氨量合理控制SCR出口參數(shù)，避免過調(diào)。根據(jù)設(shè)計條件，每臺爐SCR系統(tǒng)都有設(shè)計比較大噴氨量。當(dāng)自調(diào)或人工調(diào)整時，應(yīng)當(dāng)注意不要高于此限值，若是自由大量噴氨才能將Nox降低到**排放值，應(yīng)考慮其他方面的影響，不應(yīng)*靠過噴氨量來實(shí)現(xiàn)。加強(qiáng)對噴氨格柵均勻性的調(diào)整制定噴氨格柵定期調(diào)整試驗機(jī)制，每次檢修或每半年均應(yīng)對噴氨格柵進(jìn)行一次優(yōu)化，防止噴氨不均勻造成反應(yīng)效率下降，浪費(fèi)氨氣的同時造成空預(yù)器***氫氨堵塞。控制氨逃逸濃度運(yùn)行中加強(qiáng)對氨逃逸濃度的監(jiān)視，發(fā)現(xiàn)氨逃逸濃度異常升高，應(yīng)立即降低噴氨量，查找原因，若因噴口堵塞或脫落，應(yīng)及時修復(fù)，避免長時間不均勻運(yùn)行。定期更換催化劑層建立各爐催化劑臺賬，對催化劑進(jìn)行全壽命管理，及時更換失效的催化劑，保證脫硝反應(yīng)效率。預(yù)防空預(yù)器壓差增大定期工作因脫硝**排放及當(dāng)前脫硝調(diào)節(jié)系統(tǒng)特性問題。板式空氣預(yù)熱器怎么清洗？浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)</p><p style="text-indent:25px">板式空氣預(yù)熱器使用在鋼鐵行業(yè)的煉鋼爐。浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)</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?，F(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。浙江安全可靠空氣預(yù)熱器的用途和特點(diǎn)</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2932844.html</p></div></div></div></div></div><div id="tmyv22n" class="page-right twoColRt"><div id="a2n7ifm" class="box01 margin10 clearfix"><h3><a 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