| 摘要 |
A sealing arrangement is provided between a rotary drum kiln and the stationary end thereof arranged in a material flow relation to each other, having enhanced effectiveness and requiring less maintenance. Pressurized gas, such as air, is fed to the connecting area of the drum and stationary end so that the angle alpha between the feeding direction of the gas and a plane substantially perpendicular to the center axis of the rotary drum is 90° or less (preferably between about 10-30°). The air flow is directed to the seal in such a way that it prevents leaking of process gas and solid matter dust from the connecting point of the rotary drum and the feed chamber, and so that as little air as possible escapes to the surroundings. Due to the gas flow, the stationary surface and the moving surface substantially do not rub together. |
