Big hood subassembly of circulating fluidized bed coal fired boiler

The utility model relates to a big hood subassembly field of boiler provides a big hood subassembly of circulating fluidized bed coal fired boiler, including the connecting plate, there is an inner tube connecting plate below through threaded connection, the inner tube periphery still is equipped with an outer tube and connecting plate welded fastening, leaves the space between this inner tube and the outer tube, inner tube upper portion is evenly distributed round fresh air inlet still, it strengthens fixed inner tube still evenly to be provided with a plurality of bolts on its arced sidewall of connecting plate, it highly is greater than the outer tube height inner tube, inner tube bottom welded fastening is on boiler slagging pipe, outer tube orifice plate bottom boiler furnace does not weld and leaves the space. The utility model discloses an inner tube and connecting plate threaded connection add four pins and strengthen fixedly, and reinforcing structural strength, then the beading effectively makes the