Wind-supplying pipe heat insulation device inside carbon element calcining rotary kiln and its preparation and method for using

Abstract

A heat insulation device for air supply pipes in a carbon calcined rotary kiln. It is mainly composed of parallel irons, castables, and anchor nails. It is hollow and semi-cylindrical. The inner wall is equipped with parallel irons. Weld a T-shaped or V-shaped anchor nail every 30mm, and set a corresponding outer convex semi-circle II and semi-circular inner groove II on the two ends of the combined heat insulation prefabricated block, and set corresponding ones on the sides An outer convex semicircle I and a semicircular inner groove I. The equipment is prefabricated and fired at high temperature, and the castable used has been baked before the binding block is installed, so its strength and practical performance are not limited by the kiln curve. The equipment and the air supply pipe are welded together by the pad iron attached to the wrapping block, which is convenient for construction and replacement, and can ensure a firm and reliable connection between the two, and the wrapping block is not easy to fall off, which can greatly increase the service life of the air supply pipe.

Description

technical field [0001] The invention belongs to the field of carbon calcining rotary kiln equipment, and at the same time relates to the application technology of refractory materials. It is mainly used for heat insulation protection of the air supply pipeline in the carbon calcination rotary kiln, and can also be used for heat insulation protection of similar thermal equipment. Background technique [0002] As an important thermal equipment, the rotary kiln has been widely used in industrial fields such as burning lime, cement, reducing sintered ore, and incinerating industrial pollutants. Compared with other corresponding thermal equipment, it has better materials Adaptability and high thermal energy utilization. However, the use of it for calcining petroleum coke started relatively late in our country, with only a production history of more than 20 years. Its design is mainly based on similar foreign equipment, and furnaces are used to build furnaces, which often differs...

AI Technical Summary

Problems solved by technology

The existing wrapping technology is generally to apply a certain thickness of refractory castable after welding a certain number of anchor nails on the outer wall of the air supply pipe. This wrapping method has the following disadvantages: on the one hand, for the newly built kiln, During the kiln drying process, the kiln drying curve is mainly formulated according to the properties and characteristics of the refractory material of the kiln body, but the actual temperature rise curve near the air supply pipe is difficult to match with the temperature rise curve required for the air supply pipe wrapping material, which makes it use The performance is difficult to guarantee; on the other hand, for the rotary kiln repaired due to the partial fall off of the castable for the air supply pipe, it is impossible to spend a long time baking it according to the baking curve required for the castable

Due to the above two reasons, the service life of the air supply pipe becomes very short, which does not match the maintenance period of the kiln body. Often, one or several air supply pipes are burned out shortly after the kiln is started. During production, the burnt air supply pipe had to be blocked from the outside, making it lose the air supply function, resulting in a serious shortage of air supply in the kiln, which will have a great impact on the quality of calcined coke

In severe cases, production has to be stopped for maintenance, which seriously affects the output of the rotary kiln

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