A dry -type purification unit for coal heating boiler flue gas

The utility model relates to a synchronous SOx/NOx control technique especially relates to a dry -type purification unit for coal heating boiler flue gas, include cong flue gas inlet port (4) to venturi section (2) that flue gas discharge port (5) connected gradually, cyclic annular interior component (3) and comprehensive reactor casing (1), wherein venturi section (2) comprise seven conducting hole (21), and seven conducting hole (21) are close to in cyclic annular the bore of component (3) one side and are greater than the bore near flue gas inlet port (4) one side, component (3) are by characteristics such as the vortex circle of setting in the barrel constitute in cyclic annular. The utility model discloses whole process makes the mobile speed of flue gas higher, has the efficient contact between the gas -solid, reacts more thorough, owing to set up multilayer purifier in synthesizing the reactor casing, realized that the equipment among the flue gas discharge system is multi -functional, the effectual i