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aos-once="true"></div> </section>  <div class="ek7pfuqu2l" id="n_main"> <section id="n_jishu_xq" class="m"> <h3 id="tt">干熄焦工藝技術(shù)</h3> <div class="ek7pfuqu2l" id="time"><h4>2019-09-26</h4></div> <div id="ek7pfuqu2l" class="ar_article"> <p><span style="font-size: 18px; color: rgb(63, 63, 63);"><strong style="background-color: rgb(255, 255, 255); color: rgb(0, 155, 180); text-indent: 28px; white-space: normal;">項目背景 >>></strong></span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">煉焦過(guò)程中，從炭化室推出的紅焦，溫度在 1000℃左右，濕熄焦時(shí)直接通過(guò)大量噴水熄滅，紅焦所含的顯熱相當于煉焦生產(chǎn)消耗總熱量的 35%~45%。濕法熄焦使紅焦顯熱從水變成蒸汽散失而白白浪費掉，且大量水蒸汽直接進(jìn)入大氣，其中包含大量的粉塵、酚類(lèi)、氰化物、硫化物等有毒、有害氣體，嚴重污染大氣及周?chē)h(huán)境，同時(shí)腐蝕設備。因為噴水紅焦急劇冷卻，焦炭?jì)炔拷Y構產(chǎn)生很大的熱應力，網(wǎng)狀裂紋較多，容易碎裂成小塊，大大降低了焦炭的質(zhì)量。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);"><strong style="background-color: rgb(255, 255, 255); color: rgb(0, 155, 180); text-indent: 28px; white-space: normal;">干熄焦工藝介紹 >>></strong></span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">焦炭從焦爐炭化室推到由電機車(chē)拖掛的焦罐臺車(chē)上的焦罐里，送到干熄焦裝置提升井架底部，提升機將焦罐提升并橫移至干熄爐爐頂，通過(guò)裝入裝置裝入干熄爐內。裝焦完畢焦罐被運送到提升井前，這時(shí)裝焦漏斗自動(dòng)走開(kāi)，干熄爐裝焦口蓋上蓋子，隨后空焦罐放到焦罐臺車(chē)上。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">紅焦炭從干熄爐上部進(jìn)入，經(jīng)預存室到冷卻室，與惰性氣體進(jìn)行熱交換，焦炭被冷卻至</span><span style="color: rgb(63, 63, 63); font-size: 18px;">200℃以下，經(jīng)排焦裝置卸到皮帶輸送機上，然后送往篩貯焦系統。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">循環(huán)風(fēng)機將冷卻焦炭的惰性氣體從干熄爐底部的鼓風(fēng)裝置鼓入干熄爐內，在冷卻段經(jīng)過(guò)與熱焦炭換熱變?yōu)闊釟怏w后匯入一次除塵器。自干熄爐排出的熱循環(huán)氣體的溫度約為 900～9 50℃，經(jīng)一次除塵器除塵后進(jìn)入干熄焦余熱鍋爐換熱，溫度降至 160℃。鍋爐出來(lái)的循環(huán)氣體經(jīng)多管旋風(fēng)二次除塵器除塵后，由循環(huán)風(fēng)機加壓，再經(jīng)副省煤器換熱冷卻至 130℃左右后進(jìn)入干熄爐循環(huán)使用。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">余熱鍋爐產(chǎn)生的蒸汽進(jìn)入汽輪發(fā)電機組，所發(fā)電力并入公司電網(wǎng)，凝結水回供余熱鍋爐。汽輪發(fā)電機組檢修時(shí)，余熱鍋爐降低負荷后蒸汽放散。工藝系統圖如下：</span></p><p style="text-align: center;"><span style="font-size: 18px; color: rgb(63, 63, 63);"> <img id="ae4c7540cf31b4901bbdb8988af6869b_img_497" src="/uploadfile/ueditor/image/20220623/1655952579609054.png" title="圖片14.png" alt="圖片14.png" width="800" height="584" border="0" vspace="0" style="width: 800px; height: 584px;"/></span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">2.1 紅焦裝入系統</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">電機車(chē)牽引焦罐臺車(chē)與攔焦車(chē)對位后，旋轉焦罐開(kāi)始旋轉，旋轉平穩后向推焦車(chē)發(fā)出推焦指令，接焦完畢后，旋轉焦罐經(jīng)減速位置停止在最初的停止位置上，完全停穩后，電機車(chē)牽引焦罐臺車(chē)走行至干熄爐提升井架底部，經(jīng) APS 定位夾緊后，接空罐。隨即滿(mǎn)灌對位與提升，將裝滿(mǎn)紅焦的焦罐提升至提升井架上極限，到達上極限后，提升機開(kāi)始走行,達干熄爐上方時(shí)，裝入裝置也打開(kāi)到位，提升機即開(kāi)始卷下，焦罐落座后，提升機繼續卷下，焦罐底門(mén)在重力作用下與吊桿繼續下降，自動(dòng)完成開(kāi)門(mén)放焦動(dòng)作。紅焦落入裝入裝置料斗后，經(jīng)分料板與料鐘布料均勻地裝入干熄爐。<br/></span></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_498" src="/uploadfile/ueditor/image/20220623/1655952620416378.png" title="圖片15.png" alt="圖片15.png" width="463" height="350" border="0" vspace="0" style="width: 463px; height: 350px;"/><img id="ae4c7540cf31b4901bbdb8988af6869b_img_499" src="/uploadfile/ueditor/image/20220623/1655952651413950.png" title="圖片16.png" alt="圖片16.png" width="462" height="350" border="0" vspace="0" style="width: 462px; height: 350px;"/></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_500" src="/uploadfile/ueditor/image/20220623/1655952703190191.png" title="" alt="圖片17.png"/></p><p><span style="color: rgb(63, 63, 63); font-size: 18px;">2.2 冷焦排出系統</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">冷卻后的焦炭由電磁振動(dòng)給料器定量排出，送入旋轉密封閥，通過(guò)旋轉密封閥的旋轉在封住干熄爐內循環(huán)氣體不向爐外泄漏的情況下，把焦炭連續地排出。連續定量排出的焦炭通</span><span style="color: rgb(63, 63, 63); font-size: 18px;">過(guò)排焦溜槽送到帶式輸送機上輸出。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">干熄焦冷焦排出設備由排焦裝置及運焦皮帶兩部分組成。排焦裝置包括檢修用平板閘門(mén)、電磁振動(dòng)給料器、旋轉密封閥、吹掃風(fēng)機、自動(dòng)潤滑裝置、排焦溜槽等設備。</span></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_501" src="/uploadfile/ueditor/image/20220623/1655952725915839.png" title="圖片18.png" alt="圖片18.png" width="228" height="350" border="0" vspace="0" style="width: 228px; height: 350px;"/><img id="ae4c7540cf31b4901bbdb8988af6869b_img_502" src="/uploadfile/ueditor/image/20220623/1655952752372874.png" title="圖片19.png" alt="圖片19.png" width="495" height="350" border="0" vspace="0" style="width: 495px; height: 350px;"/></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">2.3 干熄爐系統</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">圓型干熄爐由預存段、斜道區及冷卻段組成。干熄爐結構如圖 1 所示。干熄爐為圓形截面豎式槽體，外殼用鋼板及型鋼制作，內襯隔熱耐磨材料，干熄爐頂設置環(huán)形水封槽。干熄爐上部為預存段，中間是斜道區，下部為冷卻段。預存段的外圍是匯集 36 個(gè)斜道氣流的環(huán)形氣道，它沿圓周方向分兩半匯合通向一次除塵器。預存段設有料位計、壓力測量裝置、測溫裝置及放散裝置。環(huán)形氣道設有空氣導入裝置、循環(huán)氣體旁通裝置、氣流調整裝置。冷卻段設有溫度測量孔、干燥時(shí)的排水汽孔、人孔及烘爐孔。冷卻段下部殼體上有兩個(gè)進(jìn)氣口，冷卻段底部安裝有供氣裝置。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">預存段用于接受間歇裝入的紅焦，具有緩沖功能，可補償生產(chǎn)的波動(dòng)；在冷卻段，紅焦與低溫循環(huán)氣體進(jìn)行熱交換，經(jīng)降溫冷卻后排出；斜道區位于預存段與冷卻段之間，從干熄爐底部供氣裝置進(jìn)入的低溫循環(huán)氣體吸收紅焦的顯熱后經(jīng)斜道及環(huán)形氣道排出，并流經(jīng)干熄焦鍋爐進(jìn)行熱交換。</span></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_503" src="/uploadfile/ueditor/image/20220623/1655952781172322.png" title="圖片20.png" alt="圖片20.png" width="800" height="643" border="0" vspace="0" style="width: 800px; height: 643px;"/></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_504" src="/uploadfile/ueditor/image/20220623/1655952819269977.png" title="圖片21.png" alt="圖片21.png" width="800" height="367" border="0" vspace="0" style="width: 800px; height: 367px;"/></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">2.4 氣體循環(huán)系統</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">干熄焦氣體循環(huán)設備由循環(huán)風(fēng)機、給水預熱器、干熄爐、一次除塵器、鍋爐和二次除塵器等組成。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">循環(huán)風(fēng)機為氣體循環(huán)提供動(dòng)力并根據工礦調整轉速調節循環(huán)風(fēng)量。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">一次除塵器利用重力除塵原理將循環(huán)氣體中的大顆粒焦粉進(jìn)行分離，減少循環(huán)氣體對鍋爐爐管（主要是二次過(guò)熱器管道）產(chǎn)生的沖刷磨損，達到保護鍋爐爐管的目的。</span></p><p style="text-indent: 2em;"><span style="font-size: 18px; color: rgb(63, 63, 63);">1DC 緊急放散閥以備鍋爐爆管時(shí)緊急放散蒸汽。一次除塵器底部設有灰斗，用來(lái)收集焦</span><span style="color: rgb(63, 63, 63); font-size: 18px;">粉?；叶放c 4 根水冷套管相連，水冷套管與貯灰斗相連。水冷套管上部設有料位計，達料位后水冷套管下部的排灰格式閥將焦粉排出至貯灰斗，貯灰斗上部設有料位計，達到料位后貯灰斗下部的排灰格式閥向刮板機排出焦粉。</span></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_505" src="/uploadfile/ueditor/image/20220623/1655952849521093.png" title="圖片22.png" alt="圖片22.png" width="800" height="439" border="0" vspace="0" style="width: 800px; height: 439px;"/></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">2.5 鍋爐系統</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">鍋爐汽包爐水可分為強制循環(huán)部分和自然循環(huán)部分。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">自然循環(huán)部分：汽包爐水經(jīng)汽包下降管進(jìn)入膜式水冷壁，爐水吸熱汽化成汽水混合物經(jīng)膜式水冷壁上升管返回汽包。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">強制循環(huán)部分：汽包爐水由汽包下降管經(jīng)強制循環(huán)泵送入鰭片管蒸發(fā)器與光管蒸發(fā)器，爐水吸熱汽化成汽水混合物經(jīng)蒸發(fā)器上升管返回汽包。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">這兩部分產(chǎn)生的汽水混合物在汽包中進(jìn)行汽水分離，飽和蒸汽由汽包上部導出，經(jīng)一次過(guò)熱器升溫后，進(jìn)入減溫器噴水減溫，然后進(jìn)入二次過(guò)熱器繼續升溫，從二次過(guò)熱器引出的蒸汽即為外供主蒸汽。</span></p><p style="text-align: center;"><span style="font-size: 18px; color: rgb(63, 63, 63);"> <img id="ae4c7540cf31b4901bbdb8988af6869b_img_506" src="/uploadfile/ueditor/image/20220623/1655952878664982.png" title="圖片23.png" alt="圖片23.png" width="800" height="611" border="0" vspace="0" style="width: 800px; height: 611px;"/></span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">2.6 汽輪機發(fā)電系統</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">蒸汽母管的過(guò)熱蒸汽，進(jìn)電動(dòng)隔離閥、主汽門(mén)、調節閥進(jìn)入汽輪機膨脹做功后，排至凝汽器。乏汽在凝汽器中凝結成水后，匯入熱水井，然后由凝結水泵分別進(jìn)入給水裝置。循環(huán)冷卻水泵將水池中冷卻水打入凝汽器后，再排往冷卻塔進(jìn)行冷卻，經(jīng)過(guò)冷卻的水最后回到水池循環(huán)利用。發(fā)電機冷卻介質(zhì)為空氣，冷卻方式</span><span style="color: rgb(63, 63, 63); font-size: 18px;">為閉式循環(huán)通風(fēng)冷卻。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">本汽輪機熱力系統主要由主蒸汽系統、軸封系統、疏水系統、凝結水系統、真空系統和循環(huán)水系統等組成。<br/></span></p><p style="text-align: center;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_507" src="/uploadfile/ueditor/image/20220623/1655952914321531.png" title="圖片24.png" alt="圖片24.png" width="800" height="595" border="0" vspace="0" style="width: 800px; height: 595px;"/></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);"><strong style="background-color: rgb(255, 255, 255); color: rgb(0, 155, 180); text-indent: 28px; white-space: normal;">干熄焦裝置主要技術(shù)特點(diǎn) >>></strong></span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（1）采用旋轉焦罐，既可使焦罐內焦炭分布均勻，又減少了焦罐本身的重量及維護工作量。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（2）在干熄爐頂設置料鐘布料器，克服由于裝入焦炭粒徑偏析以及料位高差，使干熄爐內的循環(huán)氣體流速不均勻等弊端，起到減少循環(huán)氣體量的目的。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（3）采用連續排料的振動(dòng)給料器與旋轉密封閥組合的排焦裝置。設備外型小，維護量小，又可穩定爐內壓力，使焦炭下落均勻。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（4）在干熄爐鼓風(fēng)裝置與主循環(huán)風(fēng)機之間設置鍋爐副省煤器，使干熄爐入口處的循環(huán)氣體溫度降至 130℃左右，確保排焦溫度≤200℃。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（5）在干熄爐頂部水封槽設置兩路水源，避免一路水源故障后燒壞水封槽。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（6）焦罐臺車(chē)采用 APS 強制對位裝置，使焦罐車(chē)的對位修正范圍控制在 100mm，對位精度達 10mm。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（7）提升機提升及走行采用變頻器調速。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（8）干熄焦裝置采用了較完善的密封除塵措施：裝焦、排焦、放散口含塵氣體均進(jìn)入除塵系統達標后排放。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（9）為配合干熄爐頂間斷裝焦，環(huán)境除塵風(fēng)機采用高壓變頻調速裝置，裝焦時(shí)風(fēng)機高速運轉、其余時(shí)間低速運轉，以達到節能目的。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（10）根據干熄爐各部位的工藝特點(diǎn)，采用不同性能的耐火材料。在耐火材料選取上除保證耐材一般理化指標外，還須兼顧耐材的高溫耐磨性、高溫抗折性及熱震穩定性，特別是在冷卻室、斜風(fēng)道、爐口等關(guān)鍵部位。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（11）鼓風(fēng)裝置中心風(fēng)、邊風(fēng)配置合理而且可調，確保干熄爐出口處焦炭冷卻強度。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（12）在干熄爐環(huán)形煙道上部設置空氣導入裝置，以平衡循環(huán)氣體中 CO、H2 等可燃氣體成分，控制為 CO<6%，H2<3％。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（13）控制循環(huán)氣體中 O2 含量，O2 含量不大于 1％。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（14）在預存室設置高低極限料位顯示、報警，并采用雷達料位計連續測量爐內料位，以保證干熄爐的正常穩定運行。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（15）一次除塵器采用錯臺無(wú)擋墻結構的重力沉降方式，增強了一次除塵器除塵效果。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（16）采用全自然循環(huán)余熱鍋爐，降低了設備投資及運行成本。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);">（17）干熄焦系統故障檢修及定期檢修時(shí)，采用濕熄焦作為備用。</span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);"><span style="color: rgb(63, 63, 63); font-size: 18px; background-color: rgb(255, 255, 255);"><strong style="background-color: rgb(255, 255, 255); font-size: 18px; white-space: normal; color: rgb(0, 155, 180); text-indent: 28px;">現場(chǎng)照片 >>></strong></span></span></p><p><span style="font-size: 18px; color: rgb(63, 63, 63);"></span></p><p style="text-align: center; line-height: normal;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_632" src="/uploadfile/ueditor/image/20240115/1705314847409076.png" style="background-color: rgb(255, 255, 255); white-space: normal; width: 483px; height: 350px;" width="483" height="350" border="0" vspace="0" title="undefined" alt="圖片25.png"/> <img id="ae4c7540cf31b4901bbdb8988af6869b_img_633" src="/uploadfile/ueditor/image/20240115/1705314857233503.png" style="background-color: rgb(255, 255, 255); white-space: normal; width: 331px; height: 350px;" width="331" height="350" border="0" vspace="0" title="undefined" alt="圖片26.png"/></p><p style="text-align: center; line-height: normal;"><img id="ae4c7540cf31b4901bbdb8988af6869b_img_634" src="/uploadfile/ueditor/image/20240115/1705314868954293.png" width="407" height="557" 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