現象三:噴嘴處(chu)漏(lou)涂(tu)料

原因:1、頂針(zhen)密封螺帽太(tai)緊(jin)

2、噴嘴端口內(nei)部有異(yi)物

3、噴嘴和頂針不配(pei)套(tao)或有損傷

4、頂針回位彈簧斷(duan)掉或未裝

對(dui)策:1、旋松頂針密封螺帽

2、清潔噴嘴

3、更換噴嘴套裝

4、更換(huan)頂針(zhen)回位(wei)彈簧或安(an)裝上頂針(zhen)回位(wei)彈簧

四(si)、上海脫硝噴槍注意事項

噴嘴出料(liao)口與被涂(tu)(tu)物之間的(de)距離稱為槍距。槍距越(yue)(yue)小，噴涂(tu)(tu)壓力(li)就越(yue)(yue)大，產品(pin)受到氣壓的(de)沖(chong)擊也越(yue)(yue)大，涂(tu)(tu)層就會出現不平均的(de)情況，產生涂(tu)(tu)抹(mo)過厚(hou)的(de)問題(ti)。槍距越(yue)(yue)大，噴涂(tu)(tu)壓力(li)越(yue)(yue)小，涂(tu)(tu)料(liao)易(yi)流失(shi)，使(shi)被涂(tu)(tu)物部分噴料(liao)過少(shao)，涂(tu)(tu)抹(mo)達(da)不到定的(de)厚(hou)度。

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循環流化床窯爐鍋爐環保(bao)噴槍(qiang)的研究比較：

首(shou)先，根據噴槍結構及工作原(yuan)理。一種為傳統(tong)的壓縮空(kong)氣氣力霧(wu)化(hua)噴槍，一種為循(xun)環流化(hua)床鍋(guo)爐脫硝設計(ji)的機械霧(wu)化(hua)噴槍。

霧化噴(pen)(pen)槍，噴(pen)(pen)槍結(jie)構主要(yao)由如下(xia)及部分(fen)組成：還原劑通道、霧化風通道、機(ji)械(xie)霧化噴(pen)(pen)嘴(zui)、快速接頭等組成。噴(pen)(pen)槍各部件(jian)均采用不銹鋼材料制造(zao)，機(ji)械(xie)霧化噴(pen)(pen)嘴(zui)多采用進口316L，310S不銹鋼制作。

霧(wu)(wu)(wu)(wu)化(hua)噴(pen)(pen)槍(qiang)安(an)裝(zhuang)(zhuang)時(shi)(shi)(shi)裝(zhuang)(zhuang)在爐(lu)(lu)墻上預埋(mai)的套(tao)管內，套(tao)管與(yu)爐(lu)(lu)墻平(ping)齊，噴(pen)(pen)槍(qiang)通過法蘭(lan)固定在套(tao)管上，電(dian)廠(chang)尿素噴(pen)(pen)槍(qiang)生產廠(chang)家，安(an)裝(zhuang)(zhuang)時(shi)(shi)(shi)噴(pen)(pen)槍(qiang)外(wai)管與(yu)預埋(mai)套(tao)管平(ping)齊，噴(pen)(pen)槍(qiang)噴(pen)(pen)嘴裝(zhuang)(zhuang)配時(shi)(shi)(shi)與(yu)噴(pen)(pen)槍(qiang)外(wai)管向爐(lu)(lu)外(wai)縮數毫米。噴(pen)(pen)槍(qiang)尾部兩接口通過快速接頭分別接還原(yuan)(yuan)劑(ji)和霧(wu)(wu)(wu)(wu)化(hua)風。鍋爐(lu)(lu)和脫硝(xiao)系(xi)統(tong)運行時(shi)(shi)(shi)，還原(yuan)(yuan)劑(ji)由還原(yuan)(yuan)劑(ji)通道進入霧(wu)(wu)(wu)(wu)化(hua)噴(pen)(pen)嘴，經機(ji)械力霧(wu)(wu)(wu)(wu)化(hua)成(cheng)合適細度霧(wu)(wu)(wu)(wu)滴噴(pen)(pen)射進入反應區，鍋爐(lu)(lu)運行時(shi)(shi)(shi)霧(wu)(wu)(wu)(wu)化(hua)風常開。

其次(ci)，霧(wu)化(hua)(hua)風(feng)(feng)的(de)(de)(de)(de)作用(yong)(yong)(yong)。是(shi)(shi)(shi)(shi)防(fang)止(zhi)噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)快(kuai)速(su)(su)(su)(su)磨(mo)損。循環流化(hua)(hua)床內(nei)(nei)(nei)煙(yan)(yan)(yan)(yan)氣的(de)(de)(de)(de)含塵(chen)量遠(yuan)高(gao)(gao)于煤(mei)粉鍋爐(lu)，旋風(feng)(feng)分離器入(ru)(ru)口水平通道(dao)內(nei)(nei)(nei)煙(yan)(yan)(yan)(yan)速(su)(su)(su)(su)一般可(ke)達25m/s。因(yin)(yin)此，傳統的(de)(de)(de)(de)霧(wu)化(hua)(hua)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)在(zai)這種環境下面(mian)臨快(kuai)速(su)(su)(su)(su)磨(mo)損的(de)(de)(de)(de)問題(ti)。脫(tuo)硝噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)的(de)(de)(de)(de)霧(wu)化(hua)(hua)風(feng)(feng)套(tao)管(guan)(guan)安(an)(an)裝在(zai)爐(lu)墻內(nei)(nei)(nei)，防(fang)止(zhi)噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)受(shou)到(dao)(dao)煙(yan)(yan)(yan)(yan)氣的(de)(de)(de)(de)直接(jie)沖刷(shua)。高(gao)(gao)速(su)(su)(su)(su)霧(wu)化(hua)(hua)風(feng)(feng)包圍(wei)著噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)隨機械力霧(wu)化(hua)(hua)后的(de)(de)(de)(de)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)溶液一起噴(pen)(pen)(pen)(pen)出，在(zai)煙(yan)(yan)(yan)(yan)氣和噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)之(zhi)(zhi)間(jian)(jian)(jian)(jian)起到(dao)(dao)隔絕作用(yong)(yong)(yong)，防(fang)止(zhi)爐(lu)內(nei)(nei)(nei)氣流受(shou)到(dao)(dao)擾動時煙(yan)(yan)(yan)(yan)氣攜(xie)帶顆粒直接(jie)沖刷(shua)噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)，保護噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)不受(shou)磨(mo)損。第二是(shi)(shi)(shi)(shi)增(zeng)(zeng)加(jia)(jia)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)穿(chuan)透度(du)。還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)和煙(yan)(yan)(yan)(yan)氣的(de)(de)(de)(de)混合程度(du)是(shi)(shi)(shi)(shi)脫(tuo)硝技(ji)術的(de)(de)(de)(de)關鍵因(yin)(yin)素(su)之(zhi)(zhi)一。高(gao)(gao)速(su)(su)(su)(su)霧(wu)化(hua)(hua)風(feng)(feng)的(de)(de)(de)(de)增(zeng)(zeng)加(jia)(jia)可(ke)以攜(xie)帶著機械力霧(wu)化(hua)(hua)后的(de)(de)(de)(de)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)溶液，深度(du)穿(chuan)透至煙(yan)(yan)(yan)(yan)氣中(zhong)，從而(er)增(zeng)(zeng)加(jia)(jia)了(le)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)與(yu)(yu)煙(yan)(yan)(yan)(yan)氣的(de)(de)(de)(de)混合程度(du)，為(wei)保證(zheng)脫(tuo)硝率奠定了(le)基礎。第三(san)是(shi)(shi)(shi)(shi)增(zeng)(zeng)加(jia)(jia)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)霧(wu)化(hua)(hua)細(xi)(xi)度(du)。還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)的(de)(de)(de)(de)霧(wu)化(hua)(hua)細(xi)(xi)度(du)也(ye)(ye)直接(jie)影(ying)響的(de)(de)(de)(de)脫(tuo)硝率，在(zai)其他條(tiao)件同等的(de)(de)(de)(de)情況下，還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)霧(wu)化(hua)(hua)細(xi)(xi)度(du)越(yue)細(xi)(xi)，還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)表面(mian)積越(yue)大，與(yu)(yu)煙(yan)(yan)(yan)(yan)氣中(zhong)的(de)(de)(de)(de)NOx的(de)(de)(de)(de)接(jie)觸面(mian)積越(yue)大，從而(er)增(zeng)(zeng)加(jia)(jia)了(le)脫(tuo)硝率。第四是(shi)(shi)(shi)(shi)防(fang)止(zhi)鍋爐(lu)受(shou)熱面(mian)腐(fu)蝕。傳統噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)在(zai)開始噴(pen)(pen)(pen)(pen)射(she)或(huo)者(zhe)結束噴(pen)(pen)(pen)(pen)射(she)的(de)(de)(de)(de)間(jian)(jian)(jian)(jian)歇，存在(zai)還(huan)(huan)(huan)(huan)(huan)原(yuan)(yuan)(yuan)劑(ji)液滴(di)(di)直接(jie)滴(di)(di)落到(dao)(dao)水冷壁壁面(mian)上的(de)(de)(de)(de)造成(cheng)水冷壁腐(fu)蝕的(de)(de)(de)(de)風(feng)(feng)險(xian)(xian)。因(yin)(yin)此，具體使(shi)(shi)用(yong)(yong)(yong)過程中(zhong)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)的(de)(de)(de)(de)高(gao)(gao)速(su)(su)(su)(su)霧(wu)化(hua)(hua)風(feng)(feng)包圍(wei)著噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)，即使(shi)(shi)在(zai)剛開始噴(pen)(pen)(pen)(pen)射(she)或(huo)者(zhe)結束噴(pen)(pen)(pen)(pen)射(she)有(you)液滴(di)(di)滴(di)(di)落，也(ye)(ye)可(ke)將其攜(xie)帶進入(ru)(ru)爐(lu)內(nei)(nei)(nei)，避免了(le)腐(fu)蝕水冷壁的(de)(de)(de)(de)風(feng)(feng)險(xian)(xian)。第五是(shi)(shi)(shi)(shi)防(fang)止(zhi)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)槍(qiang)(qiang)體與(yu)(yu)套(tao)管(guan)(guan)之(zhi)(zhi)間(jian)(jian)(jian)(jian)堵(du)(du)灰(hui)(hui)。傳統的(de)(de)(de)(de)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)安(an)(an)裝在(zai)墻體上，套(tao)管(guan)(guan)與(yu)(yu)槍(qiang)(qiang)體之(zhi)(zhi)間(jian)(jian)(jian)(jian)極易(yi)堵(du)(du)灰(hui)(hui)，導致噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)進退困(kun)難。高(gao)(gao)速(su)(su)(su)(su)霧(wu)化(hua)(hua)風(feng)(feng)使(shi)(shi)得(de)煙(yan)(yan)(yan)(yan)氣中(zhong)的(de)(de)(de)(de)灰(hui)(hui)塵(chen)無(wu)法(fa)在(zai)套(tao)管(guan)(guan)內(nei)(nei)(nei)積聚。從而(er)保證(zheng)了(le)槍(qiang)(qiang)體的(de)(de)(de)(de)可(ke)用(yong)(yong)(yong)率，方便(bian)了(le)后期(qi)脫(tuo)硝噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)的(de)(de)(de)(de)維(wei)護檢修。第六(liu)是(shi)(shi)(shi)(shi)冷卻噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)端部。霧(wu)化(hua)(hua)風(feng)(feng)是(shi)(shi)(shi)(shi)常溫空(kong)氣，來(lai)自風(feng)(feng)機或(huo)者(zhe)壓縮(suo)空(kong)氣，潛江市尿素(su)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)，可(ke)以有(you)效冷卻噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)端部，防(fang)止(zhi)高(gao)(gao)溫損壞噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)。在(zai)傳統噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)的(de)(de)(de)(de)基礎上，所使(shi)(shi)用(yong)(yong)(yong)的(de)(de)(de)(de)噴(pen)(pen)(pen)(pen)槍(qiang)(qiang)應不存在(zai)由于停槍(qiang)(qiang)停止(zhi)運(yun)行期(qi)間(jian)(jian)(jian)(jian)套(tao)管(guan)(guan)堵(du)(du)灰(hui)(hui)無(wu)法(fa)正常退出爐(lu)膛導致噴(pen)(pen)(pen)(pen)嘴(zui)(zui)(zui)被(bei)高(gao)(gao)溫燒毀或(huo)變形的(de)(de)(de)(de)風(feng)(feng)險(xian)(xian)。

后(hou)，噴(pen)槍布置。一般循(xun)環流化(hua)床(chuang)窯爐(lu)，鍋爐(lu)煙(yan)道為矩(ju)形，且長寬比(bi)一般在2～3范圍內，所(suo)以，流化(hua)床(chuang)鍋爐(lu)脫硝設(she)施噴(pen)槍一般在煙(yan)道長邊上對稱均布2支噴(pen)槍，脫硫尿素噴(pen)槍，噴(pen)槍流量、霧(wu)化(hua)交流、霧(wu)炬長度(du)和寬度(du)根據煙(yan)道尺寸定制，保(bao)證還原劑霧(wu)炬覆蓋整個(ge)煙(yan)道。再加上煙(yan)氣進入旋風分離器后(hou)會(hui)受到強烈(lie)擾動(dong)，還原劑與(yu)煙(yan)氣可進一步(bu)混合。