Novel impurity-cleaning gasifier

The utility model discloses a novel impurity-cleaning gasifier which fundamentally solves the problem that impurities are accumulated in the traditional distillation (rectification) equipment, and the serious problems that the impurities are accumulated in the equipment to cause scale formation so as to need frequent cleaning, influence safety and the like. The novel impurity-cleaning gasifier comprises three function sections including a pre-deslagging section, a gasifying section and a high boiling material separation section. The technical key points of the gasfier are as follows: the pre-deslagging section is formed by serially connecting a plurality of deslagging units; the tops of the deslagging units are communicated; a slag outlet at the bottom of each deslagging unit is connected with a deslagging device; the gasifying section is provided with a vapour-phase material flowing cavity; a material inlet of the vapour-phase material flowing cavity is a material outlet of the pre-deslagging section; and a