低(di)溫(wen)多效(xiao)(xiao)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)是指(zhi)由多個(ge)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)相互(hu)串聯(lian)組成,采用(yong)(yong)低(di)溫(wen)模式(shi),加(jia)熱蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽,被(bei)引入(ru)(ru)加(jia)熱其中的(de)料液(ye),使料液(ye)產(chan)生(sheng)比蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽溫(wen)度低(di)的(de)幾乎等量蒸(zheng)(zheng)(zheng)(zheng)(zheng)發。產(chan)生(sheng)的(de)蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽被(bei)引入(ru)(ru)第二(er)效(xiao)(xiao)作(zuo)為(wei)加(jia)熱蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽,使第二(er)效(xiao)(xiao)冷凝(ning)水(shui)(shui)(shui)返回(hui)熱源處,其他各效(xiao)(xiao)冷凝(ning)水(shui)(shui)(shui)匯集(ji)后作(zuo)為(wei)淡化(hua)會輸(shu)出(chu)(chu),投入(ru)(ru)一份蒸(zheng)(zheng)(zheng)(zheng)(zheng)汽,可(ke)以(yi)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發出(chu)(chu)多倍的(de)水(shui)(shui)(shui),同時原水(shui)(shui)(shui)經過(guo)從開始的(de)依次濃(nong)縮(suo),在末效(xiao)(xiao)達到(dao)過(guo)飽和而結(jie)晶(jing)(jing)析出(chu)(chu),實現(xian)原水(shui)(shui)(shui)的(de)固液(ye)分(fen)離。低(di)溫(wen)多效(xiao)(xiao)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)一般常用(yong)(yong)于(yu)化(hua)工生(sheng)產(chan)的(de)濃(nong)縮(suo)過(guo)程(cheng)和結(jie)晶(jing)(jing)過(guo)程(cheng),還可(ke)以(yi)應用(yong)(yong)在工業含鹽(yan)廢水(shui)(shui)(shui)的(de)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發濃(nong)縮(suo)結(jie)晶(jing)(jing)處理過(guo)程(cheng)中。整套低(di)溫(wen)多效(xiao)(xiao)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)有板式(shi)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)和管(guan)式(shi)蒸(zheng)(zheng)(zheng)(zheng)(zheng)發器(qi)(qi)兩種,主(zhu)要(yao)換熱部件可(ke)以(yi)采用(yong)(yong)板式(shi)或者管(guan)式(shi)。