SoftColumn 軟塔

At Alfa Laval, we don’t just make do with traditional deodorization thinking – we develop new and better ideas that later set the standard for the whole industry.

Deodorization is such a crucial part of edible fats and oils processing that the only way to really get ahead – and stay there – is to use the latest technology and the best equipment.

Alfa Laval’s patented breakthrough in applying thin-film technology to modern deodorization processes opens up important opportunities for taking your processing efficiency to a new level. It enables you to use less steam and to process the oil at lower temperatures. This results in more gentle, effective treatment that greatly benefits the quality of your fats and oils.

The Alfa Laval SoftColumn? deodorization concept is also designed to be extremely versatile. Separate stripping and retention sections provide a wide range of options for implementing the most efficient deodorization solution currently available – both in new installations and when extending and updating existing fats and oils processing installations.

運(yùn)行原理

從脫氣開始

在加熱油之前，必須在真空下除去空氣（除氣）以通過防止氧化來保護(hù)產(chǎn)品的質(zhì)量。離開脫氣機(jī)后，油在特殊的換熱器（即節(jié)熱器）中通過離開除臭塔的熱油進(jìn)行再生加熱。這將確保從熱油中回收盡可能多的熱量。油隨后進(jìn)入最終加熱器，在該加熱器中，通常使用高壓蒸汽將油正好加熱到除臭所需的溫度。

汽提和保留

當(dāng)油達(dá)到指定溫度時，將其輸入除臭塔，這是用于對食用油脂進(jìn)行除臭的主要組件。這樣的除臭塔可以由汽提段和保留段組成。當(dāng)油通過汽提段時，它會受到真空和蒸汽的共同作用，由此除去比油本身的蒸氣壓更高的揮發(fā)物，包括游離脂肪酸 (FFA)。如果存在這些揮發(fā)性雜質(zhì)，食用油的風(fēng)味、氣味和穩(wěn)定性會受到影響。

油隨后在保留段中保留一定的時間以進(jìn)行熱處理（稱為熱漂白），目的是處理不良色素并確保最終產(chǎn)品的穩(wěn)定性。油在保留段中保留的時間長短在很大程度上取決于所需的產(chǎn)品規(guī)格。

冷凝除去的雜質(zhì)

已從油中除去的揮發(fā)性雜質(zhì)通過再循環(huán)和冷卻的餾出物在所謂的洗滌塔單元中冷凝。洗滌塔可以放在汽提段的頂部，也可以作為單獨(dú)的容器建造。

冷卻

最后，油分兩個階段冷卻。首先在節(jié)熱器中，然后達(dá)到指定的最終溫度。由隨后經(jīng)過拋光過濾，再輸送到后續(xù)工藝（儲存或包裝)。