Preheater Cyclone Inner Cylinder Hanger and Its Preparation Technology

Abstract

The invention discloses a preheater cyclone cylinder inner barrel hanging piece which comprises a circular-arc-shaped hanging piece body and a plurality of stop parts arranged on the upper end face and the lower end face of the hanging piece body.After the stop parts are arranged in a criss-cross mode, a plurality of grooves are formed.Reinforcing rib plates are arranged in the grooves.Alkali-resisting and high-temperature-resisting pouring layers are arranged on the reinforcing rib plates.The upper end faces of the pouring layers are flush with the upper end faces of the stop parts.At least one metal grabbing nail used for fixing the pouring layer to each reinforcing rib plate is welded to each reinforcing rib plate.The technology comprises the steps that the arc-shaped hanging piece body and the stop parts arranged in the criss-cross mode are formed in a one-time injection mode; the reinforcing rib plates are cast in the grooves formed by a pair of transverse stop parts and a pair of longitudinal stop parts in a staggered mode; the metal grabbing nails are welded to the reinforcing rib plates; alkali-resisting and high-temperature-resisting castable is poured into the grooves; the castable is dried and maintained to obtain the inner barrel hanging piece.The manufactured inner barrel hanging piece can resist high temperature, alkali corrosion and high-speed scouring of powder, and the service life is prolonged by one time.

Description

technical field [0001] The invention relates to the field of cement processing, in particular to a preheater cyclone inner cylinder hanging piece and a preparation process thereof. Background technique [0002] The preheater is the equipment for material preheating in the new dry process cement production line. The material enters from the top of the preheater, and in the process of moving downward, it is heated after meeting the hot air flow from bottom to top, and then heated in the cyclone. The cylinder is separated from the hot air after being collided with the cylinder by centrifugal force, and enters the next stage preheater by its own gravity; in order to strengthen the swirl strength, improve the separation efficiency of the material and the hot air, and reduce the powdery material in the cyclone at each level. Unnecessary circulation between the cylinders, the inner cylinder is often set in the cyclone cylinder. [0003] Common inner cylinder structures include int...

AI Technical Summary

Problems solved by technology

[0004] The working environment of the inner tube of the preheater is extremely harsh. Due to factors such as unequal expansion coefficients, different materials, and excessive operating temperature, the inner tube hangers generally have varying degrees of deformation, damage, cracking and Falling and collapsing and other phenomena will lead to a decrease in the solid-gas separation rate and material separation rate, serious heat loss, and a serious decline in output

[0005] At present, the inner tube hanger is mainly made of cast heat-resistant steel (ZG40Gr25Ni20Si2N), which can withstand a maximum temperature of 1150°; at the same time, due to the harsh environment inside the preheater, due to high temperature, high-speed erosion of alkali steam, sulfur steam and powder, The service life of the hanging piece is very short, generally less than one year, which not only affects the stability of the process, but also increases the maintenance cost

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