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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)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)　　NOx主(zhu)要包(bao)括NO和NO2并(bing)且天然礦物燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)(天然氣(qi)(qi)(qi)(qi)、煤炭、石油)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)NO主(zhu)要是(shi)(shi)NO約占90%左右(you)。因(yin)(yin)此(ci)研究燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)(zhong)NO,的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)研究NO的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)途徑(jing)。燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)(zhong)NO的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)分為熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)、快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)以(yi)及燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)(xing)三(san)種　　1.1 熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)是(shi)(shi)指(zhi)烴類或非(fei)烴類燃(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)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)a>1條(tiao)件下(xia)和非(fei)烴類燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)在(zai)(zai)(zai)a<1條(tiao)件下(xia)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)。　　1.2 快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)NOx是(shi)(shi)指(zhi)烴類燃(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)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)<1條(tiao)件下(xia)，即燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)過(guo)(guo)(guo)(guo)(guo)濃(nong)(nong)時(shi)(shi)(shi)(shi)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)。　　1.3 燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)(xing)NOx是(shi)(shi)指(zhi)燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)中(zhong)(zhong)(zhong)含氨化(hua)合(he)(he)(he)物在(zai)(zai)(zai)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)(zhong)氧(yang)(yang)化(hua)而(er)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)。　　2. NOx的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)因(yin)(yin)素(su)　　2.1熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx(T-NOx)，熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx 是(shi)(shi)由(you)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)中(zhong)(zhong)(zhong)的(de)(de)(de)(de)(de)(de)N2 在(zai)(zai)(zai)高(gao)(gao)(gao)溫(wen)下(xia)氧(yang)(yang)化(hua)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)。影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)因(yin)(yin)素(su)主(zhu)要是(shi)(shi)溫(wen)度(du)(du)(du)、O2濃(nong)(nong)度(du)(du)(du)和時(shi)(shi)(shi)(shi)間(jian)。　　2.1.1溫(wen)度(du)(du)(du)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)：溫(wen)度(du)(du)(du)對(dui)熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx的(de)(de)(de)(de)(de)(de)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)是(shi)(shi)非(fei)常明顯的(de)(de)(de)(de)(de)(de),當(dang)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)溫(wen)度(du)(du)(du)升高(gao)(gao)(gao)時(shi)(shi)(shi)(shi),T-NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)增(zeng)加(jia)(jia)。下(xia)圖給出了NOx的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)與(yu)(yu)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)溫(wen)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)關系(xi)　　2.1.2 過(guo)(guo)(guo)(guo)(guo)量(liang)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)的(de)(de)(de)(de)(de)(de)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)：熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)與(yu)(yu)氧(yang)(yang)濃(nong)(nong)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)平(ping)方根(gen)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)正(zheng)比，但(dan)在(zai)(zai)(zai)實際過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)(zhong)情況(kuang)會(hui)更復雜(za)些,因(yin)(yin)為過(guo)(guo)(guo)(guo)(guo)量(liang)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)的(de)(de)(de)(de)(de)(de)增(zeng)加(jia)(jia),一(yi)方面會(hui)增(zeng)加(jia)(jia)氧(yang)(yang)濃(nong)(nong)度(du)(du)(du),另一(yi)方面會(hui)使火(huo)焰(yan)(yan)(yan)溫(wen)度(du)(du)(du)降低(di)(di)(di),從總的(de)(de)(de)(de)(de)(de)趨勢(shi)(shi)來看,隨著過(guo)(guo)(guo)(guo)(guo)量(liang)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)的(de)(de)(de)(de)(de)(de)增(zeng)加(jia)(jia),NOx的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)先(xian)增(zeng)加(jia)(jia),到一(yi)個值后會(hui)下(xia)降。　　2.1.3 停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)的(de)(de)(de)(de)(de)(de)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)：高(gao)(gao)(gao)溫(wen)下(xia)停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)越(yue)長(chang),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)越(yue)多。氣(qi)(qi)(qi)(qi)體(ti)在(zai)(zai)(zai)高(gao)(gao)(gao)溫(wen)區(qu)(qu)域的(de)(de)(de)(de)(de)(de)停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)對(dui)熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)主(zhu)要是(shi)(shi)由(you)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)反(fan)應還沒有(you)(you)達(da)到化(hua)學(xue)平(ping)衡而(er)造成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de),下(xia)圖是(shi)(shi)在(zai)(zai)(zai)不同(tong)(tong)(tong)溫(wen)度(du)(du)(du)和不同(tong)(tong)(tong)停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)情況(kuang)下(xia)NOx 的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)與(yu)(yu)其(qi)(qi)化(hua)學(xue)平(ping)衡濃(nong)(nong)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)關系(xi)。從下(xia)圖可以(yi)看出,延長(chang)氣(qi)(qi)(qi)(qi)體(ti)在(zai)(zai)(zai)高(gao)(gao)(gao)溫(wen)區(qu)(qu)停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)或提(ti)高(gao)(gao)(gao)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)溫(wen)度(du)(du)(du),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)將(jiang)迅速(su)(su)(su)(su)增(zeng)加(jia)(jia),達(da)到其(qi)(qi)化(hua)學(xue)平(ping)衡濃(nong)(nong)度(du)(du)(du)。　　不同(tong)(tong)(tong)溫(wen)度(du)(du)(du)和停(ting)留(liu)(liu)時(shi)(shi)(shi)(shi)間(jian)下(xia)熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)趨勢(shi)(shi)　　2.2快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)NOx(P-NOx)：快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)NOx形(xing)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)與(yu)(yu)以(yi)下(xia)三(san)個因(yin)(yin)素(su)有(you)(you)關 ①CH原(yuan)子團的(de)(de)(de)(de)(de)(de)濃(nong)(nong)度(du)(du)(du)及其(qi)(qi)形(xing)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng) ②N2 反(fan)應生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)氮(dan)(dan)化(hua)物的(de)(de)(de)(de)(de)(de)速(su)(su)(su)(su)率;③氮(dan)(dan)化(hua)物間(jian)的(de)(de)(de)(de)(de)(de)相互轉化(hua)率。通常情況(kuang)下(xia),在(zai)(zai)(zai)不含N的(de)(de)(de)(de)(de)(de)碳氫系(xi)燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)低(di)(di)(di)溫(wen)且在(zai)(zai)(zai)富燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)時(shi)(shi)(shi)(shi),才考慮快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)NOx。快(kuai)(kuai)(kuai)速(su)(su)(su)(su)型(xing)(xing)(xing)(xing)(xing)NOx的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)對(dui)溫(wen)度(du)(du)(du)的(de)(de)(de)(de)(de)(de)依賴性很(hen)低(di)(di)(di),與(yu)(yu)熱(re)(re)(re)力(li)(li)(li)(li)(li)型(xing)(xing)(xing)(xing)(xing)NOx和燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)(xing)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)量(liang)相比,其(qi)(qi)量(liang)很(hen)少,一(yi)般在(zai)(zai)(zai)5%(v)以(yi)下(xia)。　　2.3 燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)型(xing)(xing)(xing)(xing)(xing)NOx :實際工程(cheng)(cheng)(cheng)(cheng)(cheng)中(zhong)(zhong)(zhong),特別是(shi)(shi)對(dui)于(yu)各種鍋(guo)爐(lu)、工業(ye)爐(lu)等較大型(xing)(xing)(xing)(xing)(xing)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)設備,其(qi)(qi)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)大都(dou)屬(shu)于(yu)擴(kuo)散(san)(san)火(huo)焰(yan)(yan)(yan),燃(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)與(yu)(yu)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)不預(yu)(yu)先(xian)混(hun)合(he)(he)(he),往往是(shi)(shi)邊混(hun)合(he)(he)(he)邊燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)。擴(kuo)散(san)(san)火(huo)焰(yan)(yan)(yan)與(yu)(yu)預(yu)(yu)混(hun)火(huo)焰(yan)(yan)(yan)結構不同(tong)(tong)(tong),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)也(ye)(ye)不同(tong)(tong)(tong)　　擴(kuo)散(san)(san)火(huo)焰(yan)(yan)(yan)與(yu)(yu)預(yu)(yu)混(hun)火(huo)焰(yan)(yan)(yan) T-NO 生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)比較　　影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)因(yin)(yin)素(su)很(hen)多,生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)也(ye)(ye)很(hen)復雜(za),既有(you)(you)擴(kuo)散(san)(san)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang),也(ye)(ye)有(you)(you)化(hua)學(xue)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang),同(tong)(tong)(tong)時(shi)(shi)(shi)(shi),還有(you)(you)放熱(re)(re)(re)和換熱(re)(re)(re)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)。此(ci)外,即使燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)的(de)(de)(de)(de)(de)(de)平(ping)均(jun)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)大于(yu)理論值(α>1),也(ye)(ye)會(hui)由(you)于(yu)混(hun)合(he)(he)(he)狀況(kuang)不同(tong)(tong)(tong),而(er)存(cun)在(zai)(zai)(zai)燃(ran)(ran)(ran)(ran)(ran)(ran)料(liao)過(guo)(guo)(guo)(guo)(guo)濃(nong)(nong)區(qu)(qu)。從而(er)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)NOx的(de)(de)(de)(de)(de)(de)生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)。在(zai)(zai)(zai)諸(zhu)多影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)中(zhong)(zhong)(zhong),燃(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)混(hun)合(he)(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)是(shi)(shi)主(zhu)要影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)因(yin)(yin)素(su)。如果燃(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)與(yu)(yu)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)混(hun)合(he)(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)屬(shu)平(ping)行氣(qi)(qi)(qi)(qi)流(liu)混(hun)合(he)(he)(he),并(bing)且混(hun)合(he)(he)(he)強度(du)(du)(du)較弱(ruo),這時(shi)(shi)(shi)(shi)燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)進行緩慢,火(huo)焰(yan)(yan)(yan)較長(chang),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)受溫(wen)度(du)(du)(du)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)小　　如果燃(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)與(yu)(yu)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)的(de)(de)(de)(de)(de)(de)混(hun)合(he)(he)(he)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)屬(shu)相交氣(qi)(qi)(qi)(qi)流(liu)或旋轉氣(qi)(qi)(qi)(qi)流(liu),則(ze)(ze)混(hun)合(he)(he)(he)強度(du)(du)(du)大,混(hun)合(he)(he)(he)良好、燃(ran)(ran)(ran)(ran)(ran)(ran)燒(shao)(shao)(shao)過(guo)(guo)(guo)(guo)(guo)程(cheng)(cheng)(cheng)(cheng)(cheng)快(kuai)(kuai)(kuai)速(su)(su)(su)(su)進行,火(huo)焰(yan)(yan)(yan)較短,火(huo)焰(yan)(yan)(yan)下(xia)游存(cun)在(zai)(zai)(zai)高(gao)(gao)(gao)溫(wen)區(qu)(qu),則(ze)(ze)NOx受溫(wen)度(du)(du)(du)影(ying)(ying)(ying)響(xiang)(xiang)(xiang)(xiang)(xiang)而(er)容易生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)。因(yin)(yin)此(ci)短火(huo)焰(yan)(yan)(yan)NO生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)曲線(xian)較長(chang),火(huo)焰(yan)(yan)(yan)向左上方移(yi)動。(如下(xia)圖)對(dui)于(yu)燃(ran)(ran)(ran)(ran)(ran)(ran)氣(qi)(qi)(qi)(qi)與(yu)(yu)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)混(hun)合(he)(he)(he)并(bing)不十分完(wan)善的(de)(de)(de)(de)(de)(de)擴(kuo)散(san)(san)火(huo)焰(yan)(yan)(yan),NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)大值,多數(shu)(shu)出現在(zai)(zai)(zai)平(ping)均(jun)過(guo)(guo)(guo)(guo)(guo)剩(sheng)空(kong)(kong)(kong)(kong)(kong)(kong)氣(qi)(qi)(qi)(qi)系(xi)數(shu)(shu)α=1.2~1.25條(tiao)件下(xia),這與(yu)(yu)預(yu)(yu)混(hun)火(huo)焰(yan)(yan)(yan)出現在(zai)(zai)(zai)α=1附(fu)近不同(tong)(tong)(tong)。　　擴(kuo)散(san)(san)火(huo)焰(yan)(yan)(yan)F-NOx生(sheng)(sheng)(sheng)成(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)(cheng)特性曲線(xian)

發(fa)布日期：2019-04-12