Coked crude phenol refining device and method

The invention provides a coked crude phenol refining device. The device adopts the scheme that a crude phenol pre-distillation system, an impurity conversion system and a refining distillation system are sequentially connected through pipelines, wherein the crude phenol pre-distillation system is composed of a dehydration tower and a de-heavy tower, which are connected; the impurity conversion system is composed of a middle tank and an adsorption reaction tower, which are connected; the refining distillation system is composed of a phenol tower, an o-cresol tower and a m-cresol and p-cresol tower, which are connected in sequence. According to the invention, the problem of impurity removal in the adsorption reaction tower is solved through a sweetening catalyst, so that the fact that a liquid oxidizing agent is added into raw material crude phenol is avoided and the operation and control are simpler and more convenient; the conventional intermittent distillation process of phenol fractions is eliminated, so that the whole crude phenol refining process becomes very refined and the processing cost of products is reduced greatly; the whole production process flow is reasonable, the device is high in automation degree, the product quality is high and the energy consumption is low.