Embedded type cylindrical blast cap with throttling block

Abstract

The invention relates to an embedded type cylindrical blast cap with a throttling block, 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 type cylindrical blast cap further comprises a throttling block, the throttling block is of a disc shape, and at least one throttling hole interpenetrating the upper and the lower surfaces is arranged on the throttling block; the throttling block is covered and fixed at the opening at the upper end of the embedded pipe, a deflection area communicated with the circular seam is arranged between the inner surface of a top plate of the outer sleeve pipe and the upper surface of the throttling block, and the deflection area is communicated with the inner cavity of the embedded pipe; and the sum of the flow areas of all the through holes on the side wall of the outer sleeve pipe, the flow area of the deflection area, the flow area of the circular seam and the flow area of the inner cavity of the embedded pipe are all larger than that of the throttling hole. The embedded type cylindrical blast cap with the throttling block can accurately control the resistance of the blast cap during the manufacturing and the installing processes.

Description

field of invention [0001] The invention relates to an air cap used for a fluidized bed air distributor, in particular to an embedded cylindrical air cap with a throttling block used for a fluidized bed air distributor. technical background [0002] Fluidized bed is a widely used industrial device mainly used for gas-solid reaction. It has a series of advantages such as simple structure, no moving parts, and uniform gas-solid mixing. One of the key components in its application is the air distribution plate, which is the bottom plate of the fluidized bed furnace, and its lower part is connected with the air chamber. The entire area of ​​the plate passes evenly, entering the furnace. The main performance of the air distribution plate is the uniformity of the air distribution, which is one of the keys to ensure the fluidization quality of the fluidized bed. In the past two decades, air distribution panels with hoods have been widely used. When the area of ​​the air distribut...

AI Technical Summary

Problems solved by technology

Chinese Utility Model Patent No. 02290985.0 discloses a return air cap. The outer casing and the core pipe are connected by threads. The resistance of the hood is inconsistent, so that the bed material cannot be uniformly fluidized

Chinese Utility Model Patent No. 03200899.6 discloses a built-in reverse flow cylindrical hood, in which a positioning ring is set on the inline tube to accurately control the gap between the outer casing and the top of the core tube, avoiding the interference of installation factors on the resistance of the hood; but due to The inner tube and the outer tube are usually manufactured by precision casting. The tolerance of key dimensions such as the inner diameter and wall thickness of the inner tube, the inner diameter of the outer tube and the diameter of the small hole in the casting often causes the actual resistance of the hood to deviate from the design value, especially when the hood is small The deviation of air cap resistance caused by manufacturing tolerance will be very serious, resulting in deviation of air distribution plate resistance and poor fluidization, which will have a great impact on the stable operation of the boiler in severe cases

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