| 摘要 |
<p>PURPOSE:To reduce the time of construction, by inserting bushes into open holes provided to a gas distributing plate, and attaching gas blow-in pipes easily by penetrating them through the bushes. CONSTITUTION:A gas distributing plate 3 is placed at the upper part of a gas dispersing tank 2 and above a liquid level L, and bushes 6 are inserted into holes 5 provided to the plate 3. Gas blow-in pipes 4 are made to penetrate through the bushes 6 to extend to the lower side of the liquid level L located below the plate 3, and stoppers 7 are respectively attached to the parts of the pipes 4 locating at the upper side of the bushes 6. A supporting material 8 is attached to the parts of the pipes 4 locating at the lower side of the plate 3. The plate 3 and the blow-in pipe 4 are made of the same material or different materials, that is, a metal, an ERP, a metal lined with FRP, and general-purpose plastics are used. The bush 6 is made of a flexible material such as natural rubber or synthetic rubber.</p> |
