目前,我国中小企业采用的普通冲天炉除尘装置内顶罩大多如图1所示结构。这种结构的冲天炉在实际操作中普遍会遇到一个棘手的问题,就是烟气灰尘从烟囱内排出不畅,大量灰尘、浓烟从加料口溢出, At present, China’s small and medium-sized enterprises commonly used cupola dust removal device within the top cover as shown in Figure 1 structure. This structure of the cupola in practice generally encounter a thorny problem is that smoke and dust discharged from the chimney poor, a lot of dust, smoke overflow from the feeding port,