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line-height:30px;">更方便</p> </div> <div style=" clear:both;"></div> </div> </li> <li style="height:auto;"><div class="sqpfxvf" id="shop_cart"></div></li> </ul> <div id="g5zwvtw" class="text editor" style="clear:both;"> <div style=" height:29px; margin-bottom:20px; margin-top:10px; padding-bottom:2px; background: #f2f2f2;"> <div id="8jdtqhh" class="tab active" id="proinfo" onclick="javascript:tab_menu(this)">產(chǎn)品詳情</div></div> <div class="zc4botr" id="proinfo_c" class="tabc"> <p> <br /> </p> <p> 工業(yè)燒嘴 </p> <p> 工業(yè)爐燒嘴為什么有時(shí)候會(huì )點(diǎn)不上火？ </p> <p> 一、點(diǎn)火系統構成 </p> <p> 完整的點(diǎn)火系統基本的結構是點(diǎn)火裝置和熄火保護裝置。燒嘴的點(diǎn)火裝置一般包括點(diǎn)火電和點(diǎn)火器（內配有變壓器也有的是外配型），通過(guò)變壓器后的電壓達10kv以上，點(diǎn)火電對點(diǎn)火柱高壓放電產(chǎn)生電火花來(lái)引燃天然氣。 </p> <p> 二、熄火保護系統 </p> <p> 熄火保護系統是由燒嘴控制器、電磁閥和火焰檢測共同完成，火焰檢測方式以紫外線(xiàn)檢測和電檢測兩種形式為主。利用火焰的導電性，燃燒過(guò)程中電路通路，產(chǎn)生微弱電流，經(jīng)信號放大器放大后感應到火焰是否存在，小功率燒嘴采用這種檢測方式較多，經(jīng)濟實(shí)用。 </p> <p> 另外一種是紫外線(xiàn)探頭檢測，利用設備只能對火焰紫外線(xiàn)敏感，對紅外線(xiàn)和外界環(huán)境的其他波長(cháng)的關(guān)不感應，確定燒嘴是否有火焰存在，將信號傳達給燒嘴控制器。 </p> <p> 三、穩定燃燒的條件 </p> <p> 穩定燃燒的基礎是不出現脫火和回火，但天然氣由于其自身的特性，相比其他燃氣而言比較容易脫火或回火，因此天然氣燒嘴在設計上須采取穩焰措施。燒嘴采用穩焰盤(pán)的方式來(lái)預防這種現象的發(fā)生，效果可觀(guān)。 </p> <p> 四、點(diǎn)火系統經(jīng)常出現的故障分析 </p> <p> 燒嘴點(diǎn)火的一般流程為，吹掃爐膛、點(diǎn)火器通電打火、電磁閥延后開(kāi)啟、天然氣遇火花點(diǎn)燃、檢測裝置檢測到火焰、控制器接受信號讓電磁閥持續打開(kāi)、燃氣正常燃燒。但如果點(diǎn)火失敗或是燒嘴出現脫火現象，檢測裝置無(wú)法檢測到火焰，導致電磁閥關(guān)閉，燒嘴熄火。 </p> <p> 1、檢測裝置導致熄火 </p> <p> 火焰存在而檢測器測不到火焰，火點(diǎn)著(zhù)了很快就熄滅了。這種現象多由于燒嘴的脫火導致檢測裝置無(wú)法檢測到信號產(chǎn)生，當火焰檢測裝置測不到火焰時(shí)，電磁閥自動(dòng)關(guān)閉，火焰熄滅。如果操作工人不注意排查問(wèn)題，頻繁點(diǎn)火，并且不吹掃爐膛，或是吹掃時(shí)間較短，很可能會(huì )出現爆鳴或是爆炸事故。使用廠(chǎng)家在選擇點(diǎn)火裝置時(shí)盡量選擇穩定可靠的控制器，選擇燒嘴燃燒穩定的廠(chǎng)家購買(mǎi)燒嘴。 </p> <p> 2、燃氣壓力導致點(diǎn)火困難 </p> <p> 燃氣壓力過(guò)高，目前爐窯上用的燒嘴多屬于低壓高速燒嘴，或是低壓亞高速燒嘴，燒嘴前的壓力都要求比較低，一般在5kpa左右。一方面有些廠(chǎng)家自身給客戶(hù)解釋不清使用壓力，還有可能是使用客戶(hù)對單位概念不清楚，習慣上用公斤的單位來(lái)衡量壓力大小，對千帕和毫巴的單位換算更是一頭霧水，導致壓力兩個(gè)度量級的提高，在高速氣流下很容易將火花吹滅。 </p> <p> 3、燃氣未通導致點(diǎn)火失敗 </p> <p> 電磁閥未及時(shí)打開(kāi)，或是失靈，導致燃氣不能通過(guò)，這種情況首先需要排除電磁閥是否能正常工作，或是接線(xiàn)是否得當。還有一種原因是燃氣雖然能通過(guò)，但濃度較低，換句話(huà)說(shuō)是助燃風(fēng)太多，致使燃氣達不到著(zhù)火的條件，這一點(diǎn)需要操作工人多次摸索，或是直接聯(lián)系熱能廠(chǎng)家，索取參考數據。 </p> <p> 4、電磁閥原因導致系統事故 </p> <p> 電磁閥在使用過(guò)程中安裝方式不當，或是電磁閥本身質(zhì)量問(wèn)題，安裝過(guò)程中管道內焊渣未能排除干凈使得電磁閥不能正常關(guān)閉或是關(guān)閉不嚴，有燃氣漏出，這種情況下突然點(diǎn)火很可能會(huì )有事故發(fā)生。 </p> <p> 電磁閥使用過(guò)程不當。電磁閥壽命有限，有些廠(chǎng)家在設置自控控溫時(shí)，為了減少成本，用電磁閥頻繁開(kāi)啟關(guān)閉，導致電磁閥過(guò)熱失效。建議采雙電磁閥，采用比例閥和執行器結合的方式控溫。有些廠(chǎng)家為了節約成本，甚至不安裝電磁閥，如果一旦突然停電，危險系數較高。 </p> <p> 雖然天然氣易燃易爆，但只要使用者正確的操作，時(shí)刻將意識提升到較高位置，不存在僥幸心理，天然氣可以更好的為工業(yè)所利用。 </p> <p> <br /> </p> <p> <img src="/Upload/thumb_5ea25f3bb841b_bateditor.jpg" /> </p> <p> <img alt="" src="/Upload/thumb_5ea25f44cf16c.jpg" /> </p> <p> <img alt="" src="/Upload/thumb_5ea25f4af0222.jpg" /> </p> <br/> <div class="3kcld9j" id="productSuffix"> <div>tags:工業(yè)燒嘴廠(chǎng)家，工業(yè)燒嘴價(jià)格，工業(yè)燒嘴批發(fā)，工業(yè)燒嘴生產(chǎn)廠(chǎng)家</div> </div> 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