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$(document).ready(function() { $('.jqzoom').jqzoom({ zoomType: 'standard', lens:true, preloadImages: false, alwaysOn:false, zoomWidth: 320, zoomHeight: 250 }); }); </script> <div class="product_detail" id="pd1"> <h6 style="text-align: center;"><strong>? <span style="font-size: 24px;color: #333">環亞環保帶您了解水泥窯尾煙氣濕法脫硫技改</span></strong> <p class="smal-hide"><span>發布時間：2020-02-24 13:22</span> <span>點擊：<script src="/plus/count.php?view=yes&aid=1440&mid=1" type='text/javascript' language="javascript"></script></span></p> </h6> <div class="wznr"><div> 1 生產簡介</div> <div> 某水泥有限公司成立于2006年1月，擁有2條5 000 t/d生產線，年產水泥300萬噸以上，是云浮市重點水泥企業之一。亨達水泥2條生產線采用平行鏡像布置，各車間布置形式比較相似。窯尾收塵器的處理風量約為100萬m3/h（工況），窯尾收塵器出口粉塵濃度控制在20 mg/Nm3以下，NOx控制在200 mg/Nm3以下。由于地方環保標準的提高，亨達水泥在2017年決定對其所屬的兩條生產線同時進行窯尾石灰石-石膏濕法脫硫技改，由中材裝備集團有限公司EPC承接，*終在2018年3月完成該項目的建設。</div> <div> 水泥生產線石灰石原料中的含硫量較高（0.55%），使得窯尾煙氣中的SO2含量很高，生料磨停時SO2排放濃度均值為1 200 mg/Nm3（*大1 500 mg/Nm3），生料磨開機時SO2排放濃度均值也達到了600 mg/Nm3（*大800 mg/Nm3）。</div> <div> 2 脫硫技改工藝及技術方案</div> <div> 石灰石-石膏濕法脫硫工藝是目前技術*成熟、脫硫效率*高、應用*廣泛、運行*穩定的脫硫工藝。結合水泥生產線工藝特點，將窯尾收塵系統替代脫硫劑粉磨系統，故本項目脫硫工藝由以下主要的子系統構成，包括：脫硫塔系統、脫硫劑制備系統、石膏脫水系統等。水泥生產線濕法脫硫工藝流程見圖1。</div> <div> <img alt="" src="/uploads/allimg/200224/1-200224142512D0.jpg" /></div> <div> 該項目兩條生產線窯尾生料車間布置緊湊，生產線建設規劃時并未給脫硫系統預留空間，結合現場實際情況，經過多次協商討論和設計調整，*終確定方案為脫硫塔放置在窯尾塔架、增濕塔、窯尾收塵、高溫風機之間的空檔內，其他子系統盡量靠近脫硫塔布置。1#、2#生產線脫硫系統布置見圖2。圖2中綠色部分為濕法脫硫系統主要增加設備和建筑。由于空間狹小，大大增加了脫硫系統的設計、施工、安裝難度。</div> <div> <img alt="" src="/uploads/allimg/200224/1-20022414254AL.jpg" style="width: 685px; height: 396px;" /></div> <div> 本脫硫技改工程中雖包含兩條水泥生產線，但由于生料成分相同，窯尾煙氣量和SO2濃度基本相似。故這兩條生產線濕法脫硫系統的設備配置規格幾乎完全一樣，布置上只是由于空間問題致使設備放置的位置不同而產生差異。</div> <div> 3.1 脫硫塔系統</div> <div> 本工程中脫硫塔塔徑統一設計為Φ8.8 m。脫硫塔內配置2507不銹鋼氧化風管1組，2507不銹鋼側攪拌器1組，高鉻合金漿液循環泵3臺。高鉻合金及雙相不銹鋼提高了設備的耐腐蝕性能，增加了設備的穩定性和耐用壽命。脫硫塔系統中同時還配置了漿液地坑1座，石膏排出泵1臺，FRP噴淋層3層， 75 kW羅茨風機2臺，PP材質屋脊式除霧器2層。</div> <div> 3.2 脫硫劑制備系統</div> <div> 本工程中的1#生產線的脫硫劑采用窯尾收塵器的回灰，2#生產線的脫硫劑采用窯尾SP爐灰斗的回灰，不用單獨設計石灰或者石灰石粉磨系統，這也充分體現了水泥窯脫硫采用濕法脫硫技術的成本優勢。脫硫劑制備槽放置在窯尾收塵器和SP爐的回灰拉鏈機下面，通過下料管、鎖風下料器直接將拉鏈機內的石灰石粉送入漿液制備槽中。調配的漿液體積可供脫硫漿液系統使用4~5 h，且省去了石灰石粉儲倉等設備，節省了一次性投資成本，同時減少了系統維護檢修點。</div> <div> 3.3 石膏脫水系統</div> <div> 本工程中的石膏脫水系統配置了4 m2的真空皮帶脫水機1臺，與真空皮帶脫水機配套的設備還有旋流器、濾液水箱、氣液分離器、真空水環泵、濾布沖洗水泵各1臺，同時設置了1間石膏堆庫用于臨時堆放脫硫石膏。該脫水系統比旋轉板框等脫水系統穩定性高，故障率低，設備維護簡單。</div> <div> 3.4 其他配套設備</div> <div> 脫硫系統為了獲得穩定的水源，本工程中配套Φ4.0 m×4.0 m工藝水箱1座，除霧器沖洗水泵1臺。為了方便應對水泥窯系統的大修，為脫硫系統配置了1座Φ7.0 m×12.0 m的事故漿液罐，用于臨時儲存脫硫塔內未脫水的漿液。</div> <div> 由于脫硫系統是個較復雜的環保系統，為了盡可能地實現高度自動控制，脫硫系統單獨設置了1套PLC控制系統，系統同時配套了多點壓力、溫度、密度和液位監測。</div> <div> 4 脫硫工程質量簡述</div> <div> （1）本脫硫工程質量完全滿足國家相關的設計、施工、驗收規范及標準。工程驗收指標為：</div> <div> ①窯尾主煙囪的SO2排放濃度<50 mg/Nm3（此指標基于脫硫前煙氣的SO2濃度<2 000 mg/Nm3， 10%氧含量）。</div> <div> ②窯尾主煙囪的粉塵排放濃度<20 mg/Nm3（此指標基于脫硫前煙氣的粉塵濃度<20 mg/Nm3，10%氧含量）。</div> <div> （2）脫硫系統指標考核期間各項指標情況：</div> <div> ①在考核期間，為了使脫硫系統入口SO2濃度達到2 000 mg/Nm3，生料提高了高硫石灰石的比例，但主煙囪的SO2排放濃度均低于50 mg/Nm3。</div> <div> ②在考核期間，窯尾主煙囪的粉塵排放濃度為10 mg/Nm3，遠低于驗收指標。</div> <div> 脫硫系統產生的灰渣為石膏，即CaSO4·2H2O，本期工程產生的副產品脫硫石膏的純度較高，成分檢測結果可見表1。</div> <div> <img alt="" src="/uploads/allimg/200224/1-200224142600196.jpg" style="width: 548px; height: 106px;" /></div> <div> 檢測結果表明，該脫硫石膏經過簡單的晾曬處理即可作為水泥緩凝劑使用。脫硫石膏的利用一定程度上也降低了脫硫系統運行成本。</div> </div> <p id="cztz">版權聲明：本網注明來源為“環亞環?！钡奈淖?、圖片內容，版權均屬本站所有，如若轉載，請注明本文出處：http://www.shubhyatraindia.com 。同時本網轉載內容僅為傳播資訊，不代表本網觀點。如涉及作品內容、版權和其它問題，請與本網站聯系，我們將在及時刪除內容。</p> <p><br></p> <span class="czt"> <li id="tjyd"> 推薦閱讀：<a class="czt" href="/style/hyxw/2019/1217/1308.html">RTO蓄熱式焚燒爐治理石油行業廢氣污染效果棒棒的</a> </li> </span> <div class="page" id="qhfy">上一篇：<a href='/style/hyxw/2020/0222/1439.html'>關于低溫煙氣的脫硫脫硝除塵技術應用您了解嗎</a> 下一篇：<a href='/style/hyxw/2020/0224/1441.html'>資深評標專家悄悄吐露關于環保企業的五項應標技巧</a> </div> </div> <div class="czt">您可能喜歡：</div><br> <div class="czc"> <li class="flic"> <a class="czt" href="/style/xdt/2020/0604/1761.html"> <div class="tpcd"><img src="/uploads/allimg/200604/1-2006041G611509-lp.jpg" alt="環亞環保告訴您常見的噴" 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