隨著FD凍(dong)(dong)干技術的發展,食品(pin)蔬(shu)菜深加工企業為了提供天(tian)然無添(tian)加的健(jian)康食品(pin),利(li)用蔬(shu)菜凍(dong)(dong)干技術和食品(pin)凍(dong)(dong)干機(ji)設備,進(jin)行(xing)果蔬(shu)真空(kong)冷凍(dong)(dong)干燥加工來解決果蔬(shu)傳統加工存在的問題。蔬(shu)菜凍(dong)(dong)干技術已廣(guang)泛(fan)應用于(yu)各種蔬(shu)菜、農產(chan)品(pin)等(deng)深加工生產(chan)。
大型蔬菜凍干機凍(dong)(dong)(dong)干技術是利用(yong)升(sheng)(sheng)華原(yuan)理,把含水的蔬菜(cai)(cai)經(jing)過(guo)低溫冷(leng)凍(dong)(dong)(dong)結晶成(cheng)(cheng)(cheng)固態,然后(hou)在真(zhen)空(kong)環境(jing)下(xia)(xia)進行控(kong)溫升(sheng)(sheng)華把水分除去,留下(xia)(xia)含水3~5%的凍(dong)(dong)(dong)干蔬菜(cai)(cai)。經(jing)過(guo)食品凍(dong)(dong)(dong)干機設(she)備處理后(hou)的蔬菜(cai)(cai),能基本保持(chi)原(yuan)有的色、香、味和(he)營養成(cheng)(cheng)(cheng)分。凍(dong)(dong)(dong)干后(hou)蔬菜(cai)(cai)具(ju)有較強的復水性,而且(qie)能在常溫下(xia)(xia)長時間(jian)保存。所以利于蔬菜(cai)(cai)凍(dong)(dong)(dong)干技術應(ying)用(yong)于加(jia)工花(hua)菜(cai)(cai)、西紅(hong)柿、胡蘿卜、大(da)蔥、南瓜和(he)各(ge)(ge)種(zhong)青菜(cai)(cai)等凍(dong)(dong)(dong)干加(jia)工,已經(jing)應(ying)用(yong)于蔬菜(cai)(cai)沙(sha)拉(la),蔬菜(cai)(cai)湯、方(fang)便食品配菜(cai)(cai)等凍(dong)(dong)(dong)干加(jia)工處理。目前蔬菜(cai)(cai)凍(dong)(dong)(dong)干技術應(ying)用(yong)解決各(ge)(ge)種(zhong)蔬菜(cai)(cai)傳統加(jia)工會破壞營養成(cheng)(cheng)(cheng)分,而且(qie)需要(yao)添加(jia)各(ge)(ge)種(zhong)添加(jia)劑(ji)影響食品健康(kang)和(he)保存難問題(ti)。
蔬(shu)菜(cai)凍(dong)(dong)干(gan)技(ji)(ji)術(shu)的應用需要配合(he)食(shi)品(pin)凍(dong)(dong)干(gan)機設備。食(shi)品(pin)凍(dong)(dong)干(gan)機是由凍(dong)(dong)干(gan)倉和(he)機組構建而成,由制冷系統、真空(kong)系統、循(xun)環系統、加(jia)熱系統和(he)電控系統組成運行(xing)。食(shi)品(pin)凍(dong)(dong)干(gan)機通過蔬(shu)菜(cai)凍(dong)(dong)干(gan)技(ji)(ji)術(shu)進(jin)行(xing)各種蔬(shu)菜(cai)和(he)食(shi)品(pin)進(jin)行(xing)加(jia)工生(sheng)產(chan),滿足農(nong)業和(he)企業蔬(shu)菜(cai)深加(jia)工發(fa)展(zhan)需要。