Rotary kiln multistage sealing structure

Abstract

The invention discloses a rotary kiln multistage sealing structure which baffles and reflects gas flow in a rotary kiln cylinder and which has better sealing effect. The structure comprises the rotary kiln cylinder, a kiln head cover and a sealing device; the sealing device comprises a labyrinth structure, a scale structure arranged on the outer side of the labyrinth structure and a reflection structure; the opening of one side of the labyrinth structure adjacent to the scale structure is the labyrinth outlet; the reflection structure comprises a returning spoon arranged in the clearance between the kiln head cover and the rotary kiln cylinder and a reflection plate arranged at the labyrinth outlet; the returning spoon is in an annular groove structure with the longitudinal section in an H shape, and the port of the inner side of the returning spoon faces to the clearance between the kiln head cover and the rotary kiln cylinder; the reflection plate is in an annular groove structure with the longitudinal section in a C shape, and the port of the reflection port faces to the labyrinth outlet. Swirl flow and turbulent flow of the gas flow are produced through the reflection structure, the gas flow is resisted by own, the flowing velocity and carried dust amount are decreased, and the sealing effect is fine.

Description

technical field [0001] The invention relates to a sealing structure, in particular to a multi-stage sealing structure of a rotary kiln. Background technique [0002] Rotary kiln is the main equipment for heat treatment of bulk materials, and it is mostly used in cement, building materials, chemical industry, metallurgy, papermaking and other industries. The rotary kiln shell is one of the main components of the rotary kiln. When the rotary kiln is working, the rotary kiln shell usually needs to rotate or reciprocate along its axial direction, and occasionally needs to swing; therefore, there must be enough clearance between the connection between the rotary kiln shell and other fixed parts in the rotary kiln. In order to prevent the outside air from being sucked into the rotary kiln shell or the gas carrying materials in the rotary kiln shell from leaking out, a sealing structure must be set between the rotary kiln shell and the fixed parts for sealing. [0003] The existi...

AI Technical Summary

Problems solved by technology

Among them, the fish scale seal and the labyrinth seal are both single sealing structures, and only block the airflow inside the rotary kiln cylinder, the sealing effect is average, and there is a risk of leakage for the rotary kiln with high sealing requirements; and Compared with the first two sealing structures, the sealing structure combined with fish scale and labyrinth has a better sealing effect, but it only acts as a barrier to the airflow inside the rotary kiln shell, and the sealing effect needs to be improved

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