Flexible graphite folding type rotary kiln sealing device

Abstract

The invention discloses a flexible graphite folding type rotary kiln sealing device. The flexible graphite folding type rotary kiln sealing device comprises a folding belt, a wear-resistant ring, a rotary kiln cylinder and a cover, the wear-resistant ring is fixed in the circumferential direction of the rotary kiln cylinder in a sleeved mode, the folding belt is in a conical ring shape, the small end of the folding belt is tightly attached to the wear-resistant ring, the large end of the folding belt is fixedly connected with the cover in a bonded mode through high-temperature-resistant glue, gas inside and outside a rotary kiln is isolated, and sealing is formed. The folding belt is made of a graphite film, the thickness of the folding belt ranges from 0.2 mm to 1 mm, the highest heat resistance of the folding belt is larger than or equal to 500 DEG C, the folding belt is in a conical ring shape formed by folding multiple layers in the direction of the bevel edge, the thickness of each fold ranges from 1 mm to 5 mm, and the inclination angle between each fold and a outer circle line of a rotary kiln cylinder 3 ranges from 5 degrees to 15 degrees. A wear-resistant ring 2 is made of a hard graphite ring, and the thickness of the wear-resistant ring 2 is 10-40mm. The sealing device has the advantages of simple structure, good sealing effect, long service life, high deformation compensation capability and the like.

Description

technical field [0001] The invention belongs to the technical field of industrial furnace sealing, and in particular relates to a flexible graphite folding type rotary kiln sealing device. Background technique [0002] As an industrial furnace, the rotary kiln is widely used in solid waste incineration, metallurgy, lime calcination, cement and other building materials calcination, solid material drying and other industries. The rotary kiln body is a hollow cylindrical cylinder. The material enters from the feed end of the cylinder and is heated as the cylinder rotates to complete mass transfer reactions such as drying, pyrolysis, and incineration. Finally, the material is discharged from the cylinder. end discharge. The high-temperature, toxic and harmful gases generated by the reaction are drawn out from the cover at the feed end or the discharge end for subsequent purification treatment. [0003] The rotary kiln cylinder as a mass transfer and heat transfer reactor is a ...

AI Technical Summary

Problems solved by technology

The structure of the device is complicated, and the graphite block bears a large extrusion force during the process of compensating the radial deformation, which is easy to break

[0008] The patent application number 202020239056.3 discloses a labyrinth rotary kiln sealing device, which includes a device shell, a kiln body, an air chamber and a buffer block. The device achieves internal and external gas isolation by filling a protective gas in a labyrinth structure. The structure is complex and requires additional Protective gas, part of the protective gas leaks into the internal gas, if the internal gas pressure is high, the gas protection will be destroyed, resulting in seal failure

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