SUSPENDED EXTERNAL-CIRCULATING DECOMPOSITION REACTOR HAVING HIGH SOLID-GAS RATIO

A suspended external-circulating decomposition reactor having a high solid-gas ratio, comprising: a decomposition furnace (10), the lower portion of a furnace body (11) of the decomposition furnace (10) being disposed with a feed pipe (12), a coal injection pipe (13), and a hot-air inlet (14), a bottom end of the furnace body (11) having a smoke inlet (14), and a high-temperature thermal decomposition reaction being performed on cement raw material powder in a suspended state in the decomposition furnace (10); a cyclone separator (20), communicating with a top end of the decomposition furnace (10), and a bottom outlet of a conic body of the cyclone separator (20) being connected to a discharging pipe (23) of a cyclone, for primarily separating powder particles from a dusty gas flow; and a cyclone cylinder (30), communicating with an outlet of the cyclone separator (20), a side of the cyclone cylinder (30) being disposed with an air inlet (35), a top end of the cyclone cylinder (30) being disposed with an air outlet (31), and a bottom outlet of the cyclone cylinder (30) being connected to a discharging pipe (34) of the cyclone cylinder, for well separating powder particles from the dusty gas flow. The reactor substantially reduces the emission of SO 2 and NO x , implements material circulation external to the decomposition furnace, and improves thermal reliability, thermal efficiency, and reactivity of the system.