English 
升膜蒸發器和降膜蒸發器的主要區別在於溶液的流動方向和蒸餾過程的差異。
升膜蒸發器：yuancailiaoyecongzhengfaqidediduanjindaofareguan，shourehoukuaisuqihua，xingchengdezhengqizaiguanzhongkuaisushenggao，tuidongliaoyeyanbihouchanshengbomozhuangshenggao，bingqiezaishenggaohuanjiezhongchixuhuifa。zhexiekongtiaozhengfaqishiyongshuimianzhengfabijiaoda、熱敏性和易出現泡沫水溶液，但不太適合黏度非常大、非fei常chang容rong易yi結jie晶jing體ti或huo積ji垢gou物wu料liao。升sheng膜mo蒸zheng發fa器qi的de加jia熱re室shi由you許xu多duo豎shu直zhi長chang管guan構gou成cheng，料liao液ye經jing加jia熱re後hou通tong過guo空kong調tiao蒸zheng發fa器qi底di端duan引yin進jin，進jin到dao發fa熱re管guan內nei遇yu熱re沸fei騰teng後hou快kuai速su氣qi化hua，形xing成cheng的de蒸zheng汽qi在zai發fa熱re管guan內nei快kuai速su升sheng高gao，水shui溶rong液ye也ye被bei升sheng高gao的de蒸zheng汽qi所suo推tui動dong，沿yan壁bi厚hou塗tu膜mo狀zhuang升sheng高gao，並bing在zai此ci過guo程cheng中zhong持chi續xu揮hui發fa。汽qi液ye混hun合he物wu質zhi在zai分fen離li機ji內nei分fen離li出chu來lai，成cheng功gong液ye由you分fen離li設she備bei底di端duan排pai出chu來lai，二er次ci蒸zheng汽qi即ji在zai頂ding端duan導dao出chu來lai。
降膜蒸發器：原yuan材cai料liao液ye從cong加jia熱re室shi頂ding部bu添tian加jia，在zai重zhong的de作zuo用yong下xia沿yan管guan內nei腔qiang產chan生sheng薄bo膜mo狀zhuang降jiang低di，然ran後hou進jin行xing蒸zheng發fa濃nong縮suo。水shui溶rong液ye從cong加jia熱re單dan元yuan添tian加jia，根gen據ju加jia藥yao塗tu膜mo設she備bei聯lian合he分fen布bu到dao各ge個ge換huan熱re器qi中zhong。在zai作zuo用yong力li、真空吸盤和氣旋的影響下，產生往下均勻塑料薄膜水簾。降膜蒸發器適用熱敏性物料，不適於易結晶體、積(ji)垢(gou)或(huo)黏(nian)度(du)非(fei)常(chang)大(da)物(wu)料(liao)。在(zai)每(mei)條(tiao)發(fa)熱(re)管(guan)頂(ding)部(bu)務(wu)必(bi)配(pei)有(you)降(jiang)膜(mo)分(fen)布(bu)器(qi)，以(yi)確(que)保(bao)每(mei)條(tiao)管(guan)道(dao)的(de)內(nei)壁(bi)都(dou)能(neng)為(wei)料(liao)液(ye)所(suo)潮(chao)濕(shi)，且(qie)要(yao)持(chi)續(xu)有(you)液(ye)態(tai)遲(chi)緩(huan)穿(chuan)過(guo)。若(ruo)一(yi)部(bu)分(fen)壁(bi)厚(hou)產(chan)生(sheng)幹(gan)壁(bi)狀(zhuang)況(kuang)，則(ze)無(wu)法(fa)達(da)到(dao)的(de)產(chan)能(neng)，甚(shen)至(zhi)無(wu)法(fa)保(bao)證(zheng)質(zhi)量(liang)。
chucizhiwai，jiangmozhengfaqibingmeiyoufuyaqiangxiaoyong，burongyiyouciyinqiwenchasunhai，duireminxingrongyedehuifagengweiyouli。jiangguanshizaochengbomozhuangliudongxingdezhuyaoyuanyinyushengguanshibuyiyang，qianmianyizhongzhuyaoshiyinweizhonglizuoyongxiajiyetaiduibihoudeqinrunli，jineryetaitumozhuangyanbihouwochuo，erbuqujueyuguanzhongercizhengqisudu。yiner，jiangguanshishiyongshuimianzhengfabijiaoxiaodechangsuo。
