國家對冷庫涉氨企業要求嚴格，這其實是對氨用冷庫的使用操作的一個嚴格規范，但有些企業為了避免麻煩而選擇冷庫改造氨改氟，根據制冷專家認為，氟制冷是較適合于小型冷庫，大中型冷庫使用氨制冷較長遠。小型冷庫氨改氟也(ye)是可行的(de)，下(xia)面專家(jia)針對(dui)不同原氨制冷系統特點、建筑結構、保溫特點、使用要求等(deng)提供四種改造(zao)方案(an)供參考：
第一(yi)種：原(yuan)氨(an)制(zhi)冷(leng)(leng)(leng)系(xi)(xi)(xi)統(tong)(tong)改成(cheng)氟(fu)用(yong)桶泵供液制(zhi)冷(leng)(leng)(leng)系(xi)(xi)(xi)統(tong)(tong)，采用(yong)專用(yong)冷(leng)(leng)(leng)庫載冷(leng)(leng)(leng)劑， 適用(yong)于各(ge)類(lei)螺(luo)旋速(su)凍機、隧道(dao)式單凍機、風冷(leng)(leng)(leng)型速(su)凍庫等制(zhi)冷(leng)(leng)(leng)系(xi)(xi)(xi)統(tong)(tong)，或將原(yuan)氨(an)冷(leng)(leng)(leng)庫排(pai)管(guan)更(geng)換成(cheng)氟(fu)用(yong)排(pai)管(guan)系(xi)(xi)(xi)統(tong)(tong)，冷(leng)(leng)(leng)庫改造后的制(zhi)冷(leng)(leng)(leng)系(xi)(xi)(xi)統(tong)(tong)具(ju)有(you)能(neng)效(xiao)比高、系(xi)(xi)(xi)統(tong)(tong)穩定、管(guan)理方便等特點。
第二(er)種(zhong)：原氨制(zhi)冷(leng)(leng)(leng)(leng)系統(tong)改(gai)造成(cheng)氟制(zhi)冷(leng)(leng)(leng)(leng)滿液式(shi)供(gong)液乙二(er)醇系統(tong) 保(bao)留原室內換(huan)(huan)熱器(qi)，如庫內吊(diao)頂排管、速凍(dong)擱架、冷(leng)(leng)(leng)(leng)風機、制(zhi)冰系統(tong)中的螺旋蒸發(fa)管等(deng)換(huan)(huan)熱蒸發(fa)器(qi)設(she)備，只是(shi)將(jiang)冷(leng)(leng)(leng)(leng)凍(dong)機組主機更換(huan)(huan)成(cheng)我(wo)公司的專用制(zhi)冷(leng)(leng)(leng)(leng)機組；制(zhi)取低(di)溫(wen)載(zai)冷(leng)(leng)(leng)(leng)劑(ji)輸送至室內換(huan)(huan)熱器(qi)進行換(huan)(huan)熱，從而(er)達(da)到設(she)定溫(wen)度(du)。具有施工簡單(dan)、改(gai)成(cheng)周期(qi)短、管路方便、成(cheng)本(ben)低(di)等(deng)特點(dian)。溫(wen)度(du)范(fan)圍可在(zai)(zai)+15℃至-150℃進行。采用載(zai)冷(leng)(leng)(leng)(leng)劑(ji)間接制(zhi)冷(leng)(leng)(leng)(leng)，不存(cun)在(zai)(zai)直接蒸發(fa)系統(tong)中回(hui)油難(nan)、制(zhi)冷(leng)(leng)(leng)(leng)劑(ji)容易泄(xie)漏(lou)、漏(lou)點(dian)難(nan)檢測(ce)、分液不均勻(yun)等(deng)難(nan)題(ti);只需(xu)對制(zhi)冷(leng)(leng)(leng)(leng)主機做定期(qi)保(bao)養即可，故(gu)障率(lv)低(di)、維修費用省。 設(she)備可根據冷(leng)(leng)(leng)(leng)庫實際負荷實現25%～100%進行能(neng)量調節或(huo)高效變頻節能(neng)條件，同時(shi)通過冷(leng)(leng)(leng)(leng)凍(dong)泵供(gong)液，不存(cun)在(zai)(zai)壓(ya)力損(sun)失、冷(leng)(leng)(leng)(leng)量損(sun)失、參(can)數難(nan)于控(kong)制(zhi)等(deng)問題(ti);其可控(kong)性強;故(gu)綜合(he)能(neng)效比高。
第三(san)種：原氨(an)制(zhi)冷(leng)(leng)(leng)系統改成以氨(an)系統為冷(leng)(leng)(leng)源(yuan)專用冷(leng)(leng)(leng)凍(dong)液(ye)進末端(duan)系統 保持原先(xian)的冷(leng)(leng)(leng)源(yuan)不變，通過增加臥式蒸(zheng)發器加乙二醇(chun)水泵供(gong)到末端(duan)冷(leng)(leng)(leng)風機。這(zhe)種也是目前最實惠一種改造(zao)方案(an)。
第四種：原氨制(zhi)(zhi)冷(leng)系(xi)(xi)(xi)統(tong)(tong)(tong)改成小型(xing)(xing)風冷(leng)氟(fu)利昂制(zhi)(zhi)冷(leng)系(xi)(xi)(xi)統(tong)(tong)(tong)，有些氨系(xi)(xi)(xi)統(tong)(tong)(tong)用的車間空調和小型(xing)(xing)冷(leng)庫，冷(leng)庫改造的風冷(leng)氟(fu)利昂制(zhi)(zhi)冷(leng)系(xi)(xi)(xi)統(tong)(tong)(tong)，制(zhi)(zhi)冷(leng)系(xi)(xi)(xi)統(tong)(tong)(tong)簡單，故障率低，各(ge)個系(xi)(xi)(xi)統(tong)(tong)(tong)相(xiang)互(hu)對立，節能效果明顯。 |
