重慶節(jié)能空氣預(yù)熱器誠(chéng)信經(jīng)營(yíng) 上海板換機(jī)械設(shè)備供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content=" 【摘要】：為了適應(yīng)環(huán)保新要求，SCR**排放改造后，造成空預(yù)器壓差偏大，引起風(fēng)機(jī)耗電增加、喘振失速等問(wèn)題，必須對(duì)空預(yù)器進(jìn)行升溫或在線水沖洗。經(jīng)過(guò)多次升溫消除空預(yù)器堵塞和在線水沖洗，積累了經(jīng)驗(yàn)。"><meta name="keywords" content="重慶節(jié)能空氣預(yù)熱器,空氣預(yù)熱器"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" 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上海板換機(jī)械設(shè)備供應(yīng)</p><div id="udv3gi4" class="leftbox clearfix"><h1>重慶節(jié)能空氣預(yù)熱器誠(chéng)信經(jīng)營(yíng) 上海板換機(jī)械設(shè)備供應(yīng)</h1><div id="8wdk3vk" class="proBig"><div id="3mtq3rb" class="bigimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039599609/9723902.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="ajgiubq" class="smallimg"><div><p class="pic"><img src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039599609/9723902.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="nh73g3o" 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>重慶節(jié)能空氣預(yù)熱器,空氣預(yù)熱器</p><p><span>***更新：</span>2021-01-05 04:06:03</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="oqikmjy" 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="nr39x9c" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="qkmjl27" class="box"><p><p> 【摘要】：為了適應(yīng)環(huán)保新要求，SCR**排放改造后，造成空預(yù)器壓差偏大，引起風(fēng)機(jī)耗電增加、喘振失速等問(wèn)題，必須對(duì)空預(yù)器進(jìn)行升溫或在線水沖洗。經(jīng)過(guò)多次升溫消除空預(yù)器堵塞和在線水沖洗，積累了經(jīng)驗(yàn)?？諝忸A(yù)熱器堵灰還會(huì)造成鍋爐排煙溫度升高,風(fēng)煙系統(tǒng)阻力增加，一次風(fēng)、二次風(fēng)正壓側(cè)和煙氣負(fù)壓側(cè)的壓差增大，增加了空氣預(yù)熱器漏風(fēng)，堵灰嚴(yán)重還會(huì)影響鍋爐的帶負(fù)荷能力。1.空預(yù)器堵塞的一般原因鍋爐燃煤煤種不符合設(shè)計(jì)值煤種含硫量過(guò)高。會(huì)引起煙氣**的降低，導(dǎo)致空預(yù)器冷端結(jié)露而造成腐蝕。燃煤低位發(fā)熱量過(guò)低，會(huì)造成燃煤量、煙氣量增大，增加了空預(yù)器阻力。灰分過(guò)高，造成鍋爐各受熱面積灰及磨損嚴(yán)重。揮發(fā)分過(guò)高，引起灰熔點(diǎn)下降，更容易結(jié)焦，重慶節(jié)能空氣預(yù)熱器。鍋爐啟動(dòng)時(shí)制粉系統(tǒng)投入不當(dāng)鍋爐啟動(dòng)過(guò)程中，重慶節(jié)能空氣預(yù)熱器，采用小油點(diǎn)火，或是啟動(dòng)磨煤機(jī)時(shí)，重慶節(jié)能空氣預(yù)熱器，爐膛溫度低，煤粉燃燒相對(duì)較差，勢(shì)必會(huì)造成飛灰可燃物大量增加。大量或者長(zhǎng)時(shí)間投運(yùn)油時(shí)，未燃盡的油污及未燃燒的煤粉進(jìn)入空預(yù)器增加了堵灰的風(fēng)險(xiǎn)?？疹A(yù)器吹灰介質(zhì)未達(dá)到設(shè)計(jì)值空預(yù)器采用蒸汽吹灰時(shí)，疏水不暢或時(shí)間過(guò)短，造成空預(yù)器吹灰蒸汽過(guò)熱度不足，吹灰效果差。有資料指出，空預(yù)器吹灰蒸汽過(guò)熱度應(yīng)保持在111-130℃。板式空氣預(yù)熱器使用在鋼鐵行業(yè)的煉鋼爐。重慶節(jié)能空氣預(yù)熱器</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶節(jié)能空氣預(yù)熱器,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405039599609/9723902.jpg"></div><p> 按制造廠提供的夾緊尺寸重新夾緊設(shè)備，尺寸應(yīng)均勻一致，壓緊尺寸的偏差應(yīng)不大于±0．2N(mm)(N。為板片總數(shù)），兩壓緊板間的平行度應(yīng)保持在2mm以內(nèi)。②在外漏部位上做好標(biāo)記，然后換熱器解體逐一排查解決，重新裝配或更換墊片和板片。③將開(kāi)換熱器解體，對(duì)板片變形部位進(jìn)行修理或者更換板片。在沒(méi)有板片備件時(shí)可將變形部位板片暫時(shí)拆除后重新組裝使用。④重新組裝拆開(kāi)的板片時(shí)，應(yīng)清潔板面，防止污物粘附著于墊片密封面。板式換熱器串液產(chǎn)生原因：①由于板材選擇不當(dāng)導(dǎo)致板片腐蝕產(chǎn)生裂紋或穿孔。②操作條件不符合設(shè)計(jì)要求。③板片冷沖壓成型后的殘余應(yīng)力和裝配中夾緊尺寸過(guò)小造成應(yīng)力腐蝕。④板片泄漏槽處有輕微滲漏，造成介質(zhì)中有害物質(zhì)（如C1）濃縮腐蝕板片。形成串液。現(xiàn)場(chǎng)分析發(fā)現(xiàn)，系統(tǒng)運(yùn)行溫度、流量和濃度等工藝參數(shù)均超出設(shè)計(jì)條件，使用溫度遠(yuǎn)超出材料的適用范圍。采用飽和蒸汽作為一次側(cè)熱源的板式換熱器在運(yùn)行過(guò)程中容易發(fā)生板片腐蝕。導(dǎo)致產(chǎn)品串液。這是由于蒸汽溫度較高，設(shè)備運(yùn)行中很容易造成橡膠密封墊在高溫下失效，引起蒸汽外漏并在二道密封區(qū)域急速冷凝。隨著外漏的不斷進(jìn)行，冷凝殘液越聚越多，局部形成cl質(zhì)量濃度較高區(qū)域。湖北供暖空氣預(yù)熱器板式空氣預(yù)熱器分為蓄熱式和間壁式。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶節(jié)能空氣預(yù)熱器,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220414500673828/8758232.jpg"></div><p> 供熱溫度不能滿足要求產(chǎn)生原因：①一次側(cè)介質(zhì)流量不足，導(dǎo)致熱側(cè)溫差大，壓降小。②冷側(cè)溫度低，并且冷、熱末端溫度低。③并聯(lián)運(yùn)行的多臺(tái)板式換熱器流量分配不均。④換熱器內(nèi)部結(jié)垢嚴(yán)重。處理方法：①增加熱源的流量或加大熱源介質(zhì)管路直徑。②平衡并聯(lián)運(yùn)行的多臺(tái)板式換熱器的流量。③拆開(kāi)板式換熱器清洗板片表面結(jié)垢。[6]板式換熱器主要控制參數(shù)編輯板水加熱器的主要控制參數(shù)為水加熱器的單板換熱面積、總換熱面積、熱水產(chǎn)量、換熱量、傳熱系數(shù)K、設(shè)計(jì)壓力、工作壓力、熱媒參數(shù)等。板式換熱器產(chǎn)品選用要點(diǎn)編輯⒈板式換熱器選用控制參數(shù)為換熱器材質(zhì)、工作壓力、設(shè)計(jì)溫度等。⒉選用換熱器時(shí)，應(yīng)盡量使換熱系數(shù)小的一側(cè)得到大的流速，并且盡量使兩流體換熱面兩側(cè)的換熱系數(shù)相等或相近，提高傳熱系數(shù)。經(jīng)換熱器加熱的流體溫度應(yīng)比換熱器出口壓力下的飽和溫度低10℃，且應(yīng)低于二次水所用水泵的工作溫度。⒊含有泥沙臟物的流體宜經(jīng)過(guò)過(guò)濾后進(jìn)入換熱器。⒋選用板式換熱器時(shí)，溫差較小側(cè)流體的接口處流速不宜過(guò)大，應(yīng)能滿足壓力降的要求。⒌對(duì)于流量大允許壓力降小的情況應(yīng)選用阻力小的板型，反之，選用阻力大的板型。⒍根據(jù)流體壓力和溫度情況選用可拆卸式或電焊式。</p><p> 通過(guò)調(diào)節(jié)固定在頂部結(jié)構(gòu)上的螺栓和支臂的相對(duì)位置來(lái)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(gè)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(rùn)滑，潤(rùn)滑油等級(jí)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(jì)、呼吸器和放油塞。另外還設(shè)有用于安裝測(cè)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(guò)自鎖螺母固定在轉(zhuǎn)子隔板上。所有密封片均設(shè)計(jì)呈單片直葉型．徑向密封片用來(lái)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(shí)無(wú)冷風(fēng)時(shí)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(shí)兩端均留有修整余量，現(xiàn)場(chǎng)可根據(jù)轉(zhuǎn)子外緣角鋼**終的實(shí)際位置進(jìn)行栽切。空氣預(yù)熱器的作用是使高溫?zé)煔饫鋮s，減少有害氣體排放。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="重慶節(jié)能空氣預(yù)熱器,空氣預(yù)熱器" src="http://tyunfile.71360.com/UploadFile/shbhjxsb/637220405031093750/2889219.jpg"></div><p> 進(jìn)汽端比疏水端提高了約300mm左右，可以緩解了暖風(fēng)器泄漏幾率。在暖風(fēng)器處都增加了玻璃觀察窗，以方便運(yùn)行過(guò)程中檢查暖風(fēng)器是否內(nèi)漏。制粉系統(tǒng)投運(yùn)時(shí)盡量滿足著火能量機(jī)組每次停運(yùn)時(shí)，在條件允許的情況下，盡量將安裝有等離子點(diǎn)火裝置的磨煤機(jī)對(duì)應(yīng)煤斗燒空，并在下次機(jī)組啟動(dòng)前將該煤斗配上發(fā)熱量大于4500kcal/kg，揮發(fā)份較高的煤種。同時(shí)等離子磨煤機(jī)啟動(dòng)前應(yīng)保證二次風(fēng)溫大于200℃，以減少制粉系統(tǒng)啟動(dòng)初期大量不完全燃燒產(chǎn)物的生成，從而抑止空預(yù)器堵灰的發(fā)生。加強(qiáng)省煤器輸灰系統(tǒng)綜合治理鍋爐日常運(yùn)行中加強(qiáng)省煤器灰斗料位的監(jiān)視和控制，一旦發(fā)現(xiàn)高料位，立即聯(lián)系檢修進(jìn)行處理。同時(shí)利用停爐機(jī)會(huì)，檢查省煤器灰斗真實(shí)料位，徹底疏通輸灰管線。對(duì)空預(yù)器要進(jìn)行定期吹灰且吹灰蒸汽要保證足夠的過(guò)熱度吹灰至少每8小時(shí)進(jìn)行一次，如果發(fā)現(xiàn)空預(yù)器差壓有上升趨勢(shì)，應(yīng)縮短吹灰時(shí)間間隔。吹灰程序控制必須采取疏水溫度控制，不能通過(guò)時(shí)間簡(jiǎn)單判斷疏水是否干凈，必要時(shí)進(jìn)行疏水管路改造以確?？疹A(yù)器吹灰效果。加強(qiáng)吹灰閥門(mén)的綜合治理每次停爐后對(duì)空預(yù)器吹灰進(jìn)汽閥和吹灰***進(jìn)行檢查處理，保證運(yùn)行中不發(fā)生濕蒸汽泄漏到空預(yù)器換熱元件上。板式空氣預(yù)熱器便于清潔維護(hù)。湖北供暖空氣預(yù)熱器</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。重慶節(jié)能空氣預(yù)熱器</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，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)，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)，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。重慶節(jié)能空氣預(yù)熱器</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/2707988.html</p></div></div></div></div></div><div id="ws3wbv7" class="page-right twoColRt"><div id="7ykm8i4" 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