The invention relates to an embedded type cylindrical blast cap, which belongs to the technical field of fluidized beds. The embedded type cylindrical blast cap comprises an embedded
pipe and an outer sleeve
pipe, wherein the embedded
pipe is coaxially sleeved in the outer sleeve pipe, and a circular seam is limited between the embedded pipe and the outer sleeve pipe; the embedded pipe penetrates through and is fixedly connected in an air distribution plate, and through holes are arranged on the side wall of the outer sleeve pipe; the embedded pipe is a straight pipe section with uniform inner
diameter, uniform wall thickness and two open ends, and the outer sleeve pipe is a blind pipe with a closed upper end; small holes are arranged on the circumference at the upper part of the pipe wall of the embedded pipe, and the
circular surface at the top end of the embedded pipe is in
close contact with the inner wall of the top surface of the outer sleeve pipe; and the lower part of the outer sleeve pipe is closely matched with the
peripheral surface of the embedded pipe, and the bottom end of the outer sleeve pipe is buried in the
refractory material of the air distribution plate. The embedded type cylindrical blast cap adopts the steel pipe, therefore, the manufacturing process is simplified, the manufacturing cost is saved, meanwhile, the embedded type cylindrical blast cap has the function of
slag leakage prevention, the positioning of the outer sleeve pipe and the embedded pipe is accurate, the fixation is simple and convenient, the small holes on the side wall are not easy to be worn, and the cooling of the top surface is good; the embedded pipe is simple in structure and is free from the abrasion of the material in the furnace; and the resistance of the blast cap is free from the influence of the installation factor.