AERATION APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide an aeration apparatus capable of preventing choke of air injection nozzles by preventing contact of the air injection nozzles to an object to be treated when the aeration apparatus is stopped.

SOLUTION: The aeration apparatus 1 is dipped in the object to be treated and blows air to aerate the object. The aeration apparatus 1 comprises a lower cylinder 3 having such an opening 3a formed at its lower end where the object flows in, an air reservoir 4 formed of a space defined by an outer cylinder 4a merging into the upper portion of the lower cylinder 3 and by an inner cylinder 4b and a ceiling 4c arranged at a spacing in the outer cylinder; an air feeding pipe 6 arranged in the ceiling 4c and having a plurality of air injection nozzles 6a for injecting air toward the object; a compressed air feeding pipe 7 connected outside of the air reservoir to the connecting pipe 6b of the air feeding pipe 6 for feeding the compressed air; and an upper cylinder 5 merging into the inner cylinder 4b of the air reservoir 4 and having an opening 5a formed at its upper end allowing the object to flow out.

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