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class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="n773as8" 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>江西綠色脫硝常見(jiàn)故障處理方法,脫硝</p><p><span>***更新：</span>2021-02-05 08:08:40</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="yheofco" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海煒業(yè)實(shí)業(yè)有限公司</a></p><p><span>聯(lián)系人：</span>李家煒</p><p><span>郵箱: </span>gugulee@weiyelime.com</p><p><span>電話: </span>15000346818</p><p><span>傳真: </span>021_36506078</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>021-36506078</p><p><span>地址: </span>水產(chǎn)路409號(hào)炮臺(tái)商務(wù)中心</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="3z3d47i" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="gv332y8" class="box"><p><p> 選擇性催化還原脫硝 </p> <p> 選擇性催化還原SCR法脫硝是在催化劑存在的條件下，采用氨、CO或碳?xì)浠衔锏茸鳛檫€原劑，在氧氣存在的條件下將煙氣中的NO還原為N?。 </p> <p> 可以作為SCR反應(yīng)還原劑的有NH?、CO、H?，江西綠色脫硝常見(jiàn)故障處理方法，還有甲烷、乙烯、丙烷、丙稀等。以氨作為還原氣的時(shí)候能夠得到的NO的脫除效率比較高。 </p> <p> SCR反應(yīng)是氧化還原反應(yīng)，江西綠色脫硝常見(jiàn)故障處理方法，因此遵循氧化還原機(jī)理或Mars-van Krevelen-type機(jī)理。目前，國(guó)外學(xué)者已經(jīng)在SCR反應(yīng)的反應(yīng)物是NO達(dá)成了一致，江西綠色脫硝常見(jiàn)故障處理方法，而不是NO?，并且O?參與了反應(yīng)。 </p> <p> <br /> </p> <p> <br /> 脫硝裝置在運(yùn)行工況下，氨的逃逸率小于8ppm。江西綠色脫硝常見(jiàn)故障處理方法</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西綠色脫硝常見(jiàn)故障處理方法,脫硝" src="https://tyunfile.71360.com/UploadFile/15000346818/637421580980849643/4167787.png"></div><p> 活性炭吸附配合使用電子束脫硝（EBA）EBA是國(guó)際先進(jìn)的煙氣處理技術(shù)之一，其原理是利用高能電子加速器產(chǎn)生的電子束(500～800 kV)輻照處理煙氣，將煙氣中的二氧化硫和氮氧化物轉(zhuǎn)化為硫酸銨和硝酸銨。該技術(shù)從20世紀(jì)80年代開(kāi)始先后在日本、美國(guó)、德國(guó)、波蘭等建立中試及工業(yè)示范項(xiàng)目。國(guó)內(nèi)首例EBA脫硫脫硝示范工程于1997年8月投入運(yùn)行，其實(shí)際脫硫及脫硝效率分別為86.8%和17.6%，并可回收副產(chǎn)品硫酸銨、硝酸銨。脫硝設(shè)備采用的的是選擇性非催化還原脫硝技術(shù) 江西綠色脫硝常見(jiàn)故障處理方法脫硝裝置在設(shè)計(jì)機(jī)組 60%~100%BMCR 負(fù)荷范圍內(nèi)有效地運(yùn)行，脫硝效率不低于60%；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西綠色脫硝常見(jiàn)故障處理方法,脫硝" src="https://tyunfile.71360.com/UploadFile/15000346818/637421580836434576/2989598.png"></div><p> 催化劑的選擇對(duì)SCR工藝的影響，SCR系統(tǒng)中的重要組成部分是催化劑，催化劑的選擇不**是針對(duì)反應(yīng)溫度的不同來(lái)選擇，并且要考慮SCR裝置的壓降、布置的合理性等因素。當(dāng)前流行的成熟催化劑有蜂窩式、波紋狀和平板式等。平板式催化劑一般是以不銹鋼金屬網(wǎng)格為基材負(fù)載上含有活性成份的載體壓制而成；蜂窩式催化劑一般是把載體和活性成份混合物整體擠壓成型；波紋狀催化劑是外形如起伏的波紋，從而形成小孔。當(dāng)前各種催化劑活性成分大部分為W03和V205。各種催化劑性能參數(shù)的. </p> <p> <br /> </p> <p> <br /> </p><p style="text-indent:25px">選擇性非催化還原法是一種不使用催化劑，在 850～1100℃溫度范圍內(nèi)還原NOx的方法。**常使用的藥品為氨和尿素。一般來(lái)說(shuō)，SNCR脫硝效率對(duì)大型燃煤機(jī)組可達(dá) 25%～40% ,對(duì)小型機(jī)組可達(dá) 80%。由于該法受鍋爐結(jié)構(gòu)尺寸影響很大，多用作低氮燃燒技術(shù)的補(bǔ)充處理手段。其工程造價(jià)低、布置簡(jiǎn)易、占地面積小，適合老廠改造，新廠可以根據(jù)鍋爐設(shè)計(jì)配合使用。選擇性催化還原技術(shù)（SCR）SCR 是成熟的煙氣脫硝技術(shù), 它是一種爐后脫硝。是利用還原劑(NH3, 尿素)在金屬催化劑作用下, 選擇性地與 NOx 反應(yīng)生成 N2 和H2O, 而不是被 O2 氧化, 故稱為“ 選擇性”水泥脫硝選用尿素或氨水（不選擇液氨 —危險(xiǎn)品）作還原劑，但是尿素、氨水又是通過(guò)合成氨轉(zhuǎn)換而生產(chǎn)出來(lái)的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="江西綠色脫硝常見(jiàn)故障處理方法,脫硝" src="https://tyunfile.71360.com/UploadFile/15000346818/637421581243875947/2003753.png"></div><p style="text-indent:25px">活性炭技術(shù)在火電煙氣脫硫脫硝過(guò)程中的應(yīng)用,主要是在脫硫塔中使用活性炭，活性炭能夠吸收二氧化硫，在通過(guò)氧化作用后變成硫酸，而從脫硫塔中獲取的活性炭?jī)?nèi)部是無(wú)害硫化物，而剩余煙氣中二氧化硫在一次分離作用下，排除剩余煙氣中的硫化物，落性炭有利于將有害硝化物吸收。除此之外，在脫硫脫硝活性炭技術(shù)的應(yīng)用過(guò)程中，技術(shù)人員需要注意以下內(nèi)容首先，在反應(yīng)溫度達(dá)到100~200C時(shí)，需要及時(shí)地更換活性炭:其次,認(rèn)真觀察活性炭反應(yīng)，通過(guò)分析液氮、煙氣流量、煙氣入口溫度、停留時(shí)間等各項(xiàng)參數(shù)，了解活性炭技術(shù)在脫硫脫硝中的應(yīng)用，有效地解決火電廠煙氣污染問(wèn)題本工程SNCR 脫硝系統(tǒng)選用的脫硝劑是氨水。將氨水稀釋成一定比例的稀氨水, 用輸送泵送至爐前噴槍。山東周邊燒嘴窯脫硝價(jià)格</p><p style="text-indent:25px">脫硝還原反應(yīng)的溫度比較高，比如脫硝劑為氨時(shí)，反應(yīng)溫度窗為870~1100℃。江西綠色脫硝常見(jiàn)故障處理方法</p><p style="text-indent:25px">SCR中使用的催化劑大多以TiO2為載體，以V2O5或V2 O5 -WO3或V2O5-MoO3為活性成分，制成蜂窩式、板式或波紋式三種類型。應(yīng)用于煙氣脫硝中的SCR催化劑可分為高溫催化劑（345℃～590℃）、中溫催化劑（260℃～380℃）和低溫催化劑（80℃～300℃），不同的催化劑適宜的反應(yīng)溫度不同。如果反應(yīng)溫度偏低，催化劑的活性會(huì)降低，導(dǎo)致脫硝效率下降，且如果催化劑持續(xù)在低溫下運(yùn)行會(huì)使催化劑發(fā)生長(zhǎng)久性損壞；如果反應(yīng)溫度過(guò)高，NH3容易被氧化，NOx生成量增加，還會(huì)引起催化劑材料的相變，使催化劑的活性退化江西綠色脫硝常見(jiàn)故障處理方法</p></p><br 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