The solutions are adding the pour point depression agent and steam injection from the top.

解决方案为加入降凝剂，并在罐上部注入蒸汽。

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Effects of raw material and product color of alkyl naphthalene on the pour point depression of lube oil were investigated.

考察烷基萘的原料(石蜡熔点)和产品色度对该剂降凝效果的影响。

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The effects of crude oil properties, the structure of PPD and the testing conditions on pour point depression were discussed.

讨论了原油的性质、降凝剂的结构及试验条件对降凝效果的影响。

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