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天然氣燃燒NOx的生成及其影響因素

　　1.　NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)(jing)　　NOx主(zhu)要(yao)(yao)包括NO和(he)(he)NO2并(bing)且(qie)天然礦物(wu)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)(天然氣(qi)(qi)(qi)(qi)(qi)、煤炭、石(shi)油)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)NO主(zhu)要(yao)(yao)是(shi)NO約占90%左(zuo)右。因(yin)(yin)此(ci)研(yan)(yan)究燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)NO,的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)(jing)研(yan)(yan)究NO的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)(jing)。燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)NO的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)分為(wei)熱(re)力(li)型(xing)(xing)(xing)(xing)、快速(su)型(xing)(xing)(xing)(xing)以及燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)三種　　1.1 熱(re)力(li)型(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)是(shi)指烴(jing)(jing)類(lei)(lei)或非(fei)烴(jing)(jing)類(lei)(lei)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)在(zai)(zai)(zai)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)a>1條件下(xia)(xia)(xia)和(he)(he)非(fei)烴(jing)(jing)類(lei)(lei)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)在(zai)(zai)(zai)a<1條件下(xia)(xia)(xia)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)。　　1.2 快速(su)型(xing)(xing)(xing)(xing)NOx是(shi)指烴(jing)(jing)類(lei)(lei)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)在(zai)(zai)(zai)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)<1條件下(xia)(xia)(xia)，即燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)過(guo)(guo)(guo)(guo)(guo)濃(nong)(nong)時燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)。　　1.3 燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)NOx是(shi)指燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)中(zhong)(zhong)含(han)(han)氨化(hua)(hua)合(he)(he)物(wu)在(zai)(zai)(zai)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)氧(yang)(yang)化(hua)(hua)而(er)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)。　　2. NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)響(xiang)(xiang)(xiang)因(yin)(yin)素(su)(su)(su)　　2.1熱(re)力(li)型(xing)(xing)(xing)(xing)NOx(T-NOx)，熱(re)力(li)型(xing)(xing)(xing)(xing)NOx 是(shi)由(you)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)中(zhong)(zhong)的(de)(de)(de)(de)(de)N2 在(zai)(zai)(zai)高(gao)溫(wen)(wen)(wen)下(xia)(xia)(xia)氧(yang)(yang)化(hua)(hua)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)。影(ying)(ying)響(xiang)(xiang)(xiang)因(yin)(yin)素(su)(su)(su)主(zhu)要(yao)(yao)是(shi)溫(wen)(wen)(wen)度(du)(du)(du)(du)、O2濃(nong)(nong)度(du)(du)(du)(du)和(he)(he)時間(jian)。　　2.1.1溫(wen)(wen)(wen)度(du)(du)(du)(du)影(ying)(ying)響(xiang)(xiang)(xiang)：溫(wen)(wen)(wen)度(du)(du)(du)(du)對(dui)熱(re)力(li)型(xing)(xing)(xing)(xing)NOx的(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)(xiang)(xiang)是(shi)非(fei)常(chang)明顯的(de)(de)(de)(de)(de),當燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)溫(wen)(wen)(wen)度(du)(du)(du)(du)升(sheng)高(gao)時,T-NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量增(zeng)(zeng)加。下(xia)(xia)(xia)圖(tu)給(gei)出了(le)NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量與(yu)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)溫(wen)(wen)(wen)度(du)(du)(du)(du)的(de)(de)(de)(de)(de)關系(xi)(xi)　　2.1.2 過(guo)(guo)(guo)(guo)(guo)量空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)的(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)(xiang)(xiang)：熱(re)力(li)型(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量與(yu)氧(yang)(yang)濃(nong)(nong)度(du)(du)(du)(du)的(de)(de)(de)(de)(de)平(ping)方根成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)正(zheng)比(bi)(bi)，但(dan)在(zai)(zai)(zai)實(shi)(shi)際過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)情(qing)況(kuang)(kuang)會更復(fu)雜些,因(yin)(yin)為(wei)過(guo)(guo)(guo)(guo)(guo)量空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)的(de)(de)(de)(de)(de)增(zeng)(zeng)加,一方面(mian)會增(zeng)(zeng)加氧(yang)(yang)濃(nong)(nong)度(du)(du)(du)(du),另一方面(mian)會使火(huo)焰(yan)(yan)(yan)(yan)溫(wen)(wen)(wen)度(du)(du)(du)(du)降低,從(cong)總的(de)(de)(de)(de)(de)趨勢來(lai)看(kan),隨著過(guo)(guo)(guo)(guo)(guo)量空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)的(de)(de)(de)(de)(de)增(zeng)(zeng)加,NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量先(xian)增(zeng)(zeng)加,到(dao)一個(ge)值后會下(xia)(xia)(xia)降。　　2.1.3 停(ting)(ting)留時間(jian)的(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)(xiang)(xiang)：高(gao)溫(wen)(wen)(wen)下(xia)(xia)(xia)停(ting)(ting)留時間(jian)越長(chang),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量越多(duo)。氣(qi)(qi)(qi)(qi)(qi)體在(zai)(zai)(zai)高(gao)溫(wen)(wen)(wen)區域的(de)(de)(de)(de)(de)停(ting)(ting)留時間(jian)對(dui)熱(re)力(li)型(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)(xiang)(xiang)主(zhu)要(yao)(yao)是(shi)由(you)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)反應(ying)還沒有達到(dao)化(hua)(hua)學(xue)平(ping)衡而(er)造成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de),下(xia)(xia)(xia)圖(tu)是(shi)在(zai)(zai)(zai)不(bu)(bu)同(tong)溫(wen)(wen)(wen)度(du)(du)(du)(du)和(he)(he)不(bu)(bu)同(tong)停(ting)(ting)留時間(jian)情(qing)況(kuang)(kuang)下(xia)(xia)(xia)NOx 的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量與(yu)其(qi)化(hua)(hua)學(xue)平(ping)衡濃(nong)(nong)度(du)(du)(du)(du)的(de)(de)(de)(de)(de)關系(xi)(xi)。從(cong)下(xia)(xia)(xia)圖(tu)可以看(kan)出,延長(chang)氣(qi)(qi)(qi)(qi)(qi)體在(zai)(zai)(zai)高(gao)溫(wen)(wen)(wen)區停(ting)(ting)留時間(jian)或提高(gao)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)溫(wen)(wen)(wen)度(du)(du)(du)(du),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量將迅(xun)速(su)增(zeng)(zeng)加,達到(dao)其(qi)化(hua)(hua)學(xue)平(ping)衡濃(nong)(nong)度(du)(du)(du)(du)。　　不(bu)(bu)同(tong)溫(wen)(wen)(wen)度(du)(du)(du)(du)和(he)(he)停(ting)(ting)留時間(jian)下(xia)(xia)(xia)熱(re)力(li)型(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)趨勢　　2.2快速(su)型(xing)(xing)(xing)(xing)NOx(P-NOx)：快速(su)型(xing)(xing)(xing)(xing)NOx形成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)與(yu)以下(xia)(xia)(xia)三個(ge)因(yin)(yin)素(su)(su)(su)有關 ①CH原子(zi)團的(de)(de)(de)(de)(de)濃(nong)(nong)度(du)(du)(du)(du)及其(qi)形成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng) ②N2 反應(ying)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)氮化(hua)(hua)物(wu)的(de)(de)(de)(de)(de)速(su)率;③氮化(hua)(hua)物(wu)間(jian)的(de)(de)(de)(de)(de)相(xiang)互轉化(hua)(hua)率。通常(chang)情(qing)況(kuang)(kuang)下(xia)(xia)(xia),在(zai)(zai)(zai)不(bu)(bu)含(han)(han)N的(de)(de)(de)(de)(de)碳氫系(xi)(xi)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)低溫(wen)(wen)(wen)且(qie)在(zai)(zai)(zai)富(fu)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)時,才考慮快速(su)型(xing)(xing)(xing)(xing)NOx。快速(su)型(xing)(xing)(xing)(xing)NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)對(dui)溫(wen)(wen)(wen)度(du)(du)(du)(du)的(de)(de)(de)(de)(de)依賴性很(hen)低,與(yu)熱(re)力(li)型(xing)(xing)(xing)(xing)NOx和(he)(he)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量相(xiang)比(bi)(bi),其(qi)量很(hen)少,一般在(zai)(zai)(zai)5%(v)以下(xia)(xia)(xia)。　　2.3 燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)NOx :實(shi)(shi)際工(gong)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong),特別是(shi)對(dui)于(yu)各種鍋(guo)爐、工(gong)業(ye)爐等較(jiao)大型(xing)(xing)(xing)(xing)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)設備,其(qi)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)大都(dou)屬(shu)于(yu)擴(kuo)散火(huo)焰(yan)(yan)(yan)(yan),燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)(qi)與(yu)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)不(bu)(bu)預(yu)先(xian)混(hun)合(he)(he),往往是(shi)邊混(hun)合(he)(he)邊燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)。擴(kuo)散火(huo)焰(yan)(yan)(yan)(yan)與(yu)預(yu)混(hun)火(huo)焰(yan)(yan)(yan)(yan)結(jie)構不(bu)(bu)同(tong),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)也(ye)不(bu)(bu)同(tong)　　擴(kuo)散火(huo)焰(yan)(yan)(yan)(yan)與(yu)預(yu)混(hun)火(huo)焰(yan)(yan)(yan)(yan) T-NO 生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)比(bi)(bi)較(jiao)　　影(ying)(ying)響(xiang)(xiang)(xiang)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)因(yin)(yin)素(su)(su)(su)很(hen)多(duo),生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)也(ye)很(hen)復(fu)雜,既有擴(kuo)散過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)響(xiang)(xiang)(xiang),也(ye)有化(hua)(hua)學(xue)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)響(xiang)(xiang)(xiang),同(tong)時,還有放熱(re)和(he)(he)換(huan)熱(re)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)影(ying)(ying)響(xiang)(xiang)(xiang)。此(ci)外,即使燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)平(ping)均(jun)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)大于(yu)理論值(α>1),也(ye)會由(you)于(yu)混(hun)合(he)(he)狀況(kuang)(kuang)不(bu)(bu)同(tong),而(er)存(cun)在(zai)(zai)(zai)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)料(liao)過(guo)(guo)(guo)(guo)(guo)濃(nong)(nong)區。從(cong)而(er)影(ying)(ying)響(xiang)(xiang)(xiang)NOx的(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)。在(zai)(zai)(zai)諸多(duo)影(ying)(ying)響(xiang)(xiang)(xiang)中(zhong)(zhong),燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)(qi)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)混(hun)合(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)是(shi)主(zhu)要(yao)(yao)影(ying)(ying)響(xiang)(xiang)(xiang)因(yin)(yin)素(su)(su)(su)。如(ru)果燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)(qi)與(yu)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)混(hun)合(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)屬(shu)平(ping)行(xing)(xing)氣(qi)(qi)(qi)(qi)(qi)流混(hun)合(he)(he),并(bing)且(qie)混(hun)合(he)(he)強度(du)(du)(du)(du)較(jiao)弱(ruo),這(zhe)時燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)進行(xing)(xing)緩慢(man),火(huo)焰(yan)(yan)(yan)(yan)較(jiao)長(chang),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)受溫(wen)(wen)(wen)度(du)(du)(du)(du)影(ying)(ying)響(xiang)(xiang)(xiang)小　　如(ru)果燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)(qi)與(yu)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)混(hun)合(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)屬(shu)相(xiang)交氣(qi)(qi)(qi)(qi)(qi)流或旋轉氣(qi)(qi)(qi)(qi)(qi)流,則混(hun)合(he)(he)強度(du)(du)(du)(du)大,混(hun)合(he)(he)良(liang)好(hao)、燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)快速(su)進行(xing)(xing),火(huo)焰(yan)(yan)(yan)(yan)較(jiao)短,火(huo)焰(yan)(yan)(yan)(yan)下(xia)(xia)(xia)游存(cun)在(zai)(zai)(zai)高(gao)溫(wen)(wen)(wen)區,則NOx受溫(wen)(wen)(wen)度(du)(du)(du)(du)影(ying)(ying)響(xiang)(xiang)(xiang)而(er)容易生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)。因(yin)(yin)此(ci)短火(huo)焰(yan)(yan)(yan)(yan)NO生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)曲線(xian)較(jiao)長(chang),火(huo)焰(yan)(yan)(yan)(yan)向左(zuo)上方移動。(如(ru)下(xia)(xia)(xia)圖(tu))對(dui)于(yu)燃(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)(qi)與(yu)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)混(hun)合(he)(he)并(bing)不(bu)(bu)十分完善的(de)(de)(de)(de)(de)擴(kuo)散火(huo)焰(yan)(yan)(yan)(yan),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)大值,多(duo)數(shu)出現(xian)在(zai)(zai)(zai)平(ping)均(jun)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)(qi)系(xi)(xi)數(shu)α=1.2~1.25條件下(xia)(xia)(xia),這(zhe)與(yu)預(yu)混(hun)火(huo)焰(yan)(yan)(yan)(yan)出現(xian)在(zai)(zai)(zai)α=1附(fu)近不(bu)(bu)同(tong)。　　擴(kuo)散火(huo)焰(yan)(yan)(yan)(yan)F-NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)特性曲線(xian)

發布日期：2019-04-12