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油脂设备工艺之全连续精炼脱臭工序

合格的脱色油进入螺旋板换热器回收大部分热量后进入压蒸汽加热器加热到工艺温度(240-260℃)后进入脱臭塔。脱臭塔为组合式,上层是结构填料,主要用来脱去游离脂肪酸等臭味组分,下层是板式塔,主要起热脱色的效果,并将油中的过氧化值脱到零。脱臭塔出来的油经过换热器吸收大部分热量后再与毛油进步换热,然后经冷却器冷却到80-85℃,加入所需的防氧化剂和风味剂后再冷却到50℃以下储存。脱臭出来的脂肪酸等挥发性物质,用填料式捕集器捕集,捕集液为低温(60-75℃)的游离脂肪酸。当脂肪酸暂存罐的液位较时则送到脂肪酸储罐储存。

Continuous Refining Deodorizing Process
The qualified decolored oil enters into the spiral plate heat exchanger to recover most of the heat, and next goes to high pressure steam heat exchanger to be heated to the process temperature (240-260℃) and then enters the deodorization tower. The upper layer of combined deodorization tower is the packing structure which is mainly used to remove the odor producing components such as free fatty acid (FFA); the bottom layer is the plate tower which is mainly for achieving the hot decoloring effect and reducing the peroxide value of the oil to zero. Oil from the deodorization tower enters into the heat exchanger to recover most of the heat and makes further heat exchange with crude oil, and then is cooled to 80-85℃ through the cooler. Add the required antioxidant and flavor agent, and then cool the oil below 50℃ and store it. Such volatiles as FFA from the deodorizing system are separated by the packing catcher, and the separated liquid is FFA at low temperature (60-75℃). When the liquid level in the temporary tank is too high, the oil will be sent to the FFA storage tank.

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