A Rotary Kiln Air Guide Cover Structure

Abstract

The invention discloses a rotary kiln air-guiding cover structure which comprises an air guiding cover, a rib plate and a barrel. The rib plate is located between the air guiding cover and the barrel;the air guiding cover and the rib plate are welded; the rib plate and the barrel are welded; and the barrel is arranged on a rotary kiln. The rotary kiln air-guiding cover structure is characterizedin that two groups of U-shaped connecting plates are further arranged on two sides of the rib plate and are arranged between the air guiding cover and the rib plate; the other two groups of connectingplates are arranged between the rib plate and the barrel; U-shaped ports of the connecting plates are connected onto the rib plate; threaded holes are correspondingly formed in the connecting plates,the air guiding cover and the rib plate; the connecting plates, the air guiding cover and the rib plate are connected through two-ended bolts in the threaded holes; threaded holes are correspondinglyformed in the connecting plates, the barrel and the rib plate; and the connecting plates, the barrel and the rib plate are connected through countersunk bolts in the threaded holes. The rotary kiln air-guiding cover structure provided by the invention runs stably and reliably under a high-temperature environment, the equipment failure rate is reduced, and the service life is prolonged.

Description

technical field [0001] The invention relates to the technical field of thermal equipment, in particular to a rotary kiln wind guide cover structure. Background technique [0002] The rotary kiln is one of the important equipment of the chain grate machine-rotary kiln pellet production line, and the key equipment for the roasting and consolidation of preheated pellets. The pelletizing rotary kiln of Zhanjiang Iron and Steel Plant has a design specification of φ6.96*52m, a material filling rate of 8.98%, and a processing capacity of about 645t / h. The equipment was officially put into production in September 2009. During the continuous production period, because the rotary kiln air guide is located at the discharge end of the rotary kiln, the working environment temperature of this part is relatively high during production, and because the material of the original design air guide 1 at the discharge end of the rotary kiln is 1Cr18Ni9Ti, the cylinder body 2 The material is 20g,...

AI Technical Summary

Problems solved by technology

During the continuous production period, because the rotary kiln air guide is located at the discharge end of the rotary kiln, the working environment temperature of this part is relatively high during production, and because the material of the original design air guide 1 at the discharge end of the rotary kiln is 1Cr18Ni9Ti, the cylinder body 2 The material is 20g, the material of rib plate 3 is Q235, and the design structure is that three different materials are connected by disconnection welding (see figure 1 ), due to the high temperature of the head of the rotary kiln and the influence of different base materials, the welding part is easy to be desoldered and deformed after thermal expansion, the rib plate 3 falls, and the wind guide cover 1 cannot be positioned, etc., resulting in the structure of the discharge end of the rotary kiln. Due to the cooling effect, the cylinder body at the discharge end of the rotary kiln is easily deformed, and the service life of the refractory material is greatly reduced, which seriously restricts the continuous and stable production of pellets

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