Patent DE-102011122695-A1 (DE)
Title: Clear water-air lifter with backflush function, comprises suction pipe having suction port, siphon tube, a compressed air line connected with compressor, curved drain pipe with water buffer connected to the siphon tube, and a jacket tube
Inventor: PRAEDEL HUBERT
IPC: C02F3/12
Filed: 2011-12-23
Abstract: Clear water-air lifter with backflush function, comprises a suction pipe (11) having a suction port (10) in its wall, and a siphon tube (13), where the suction tube and the siphon tube have a common connection are; a compressed air line (17) which is connected with a compressor, having a air inlet opening; a curved drain pipe (14) with water buffer which is connected to the siphon tube, such that a water line is formed from the suction port through the suction pipe in the siphon tube towards a drain pipe; and a jacket tube divided centrally by a separating wall. Clear water-air lifter with backflush function, comprises a suction pipe (11) having a suction port (10) in its wall, and a siphon tube (13), where the suction tube and the siphon tube have a common connection are; a compressed air line (17) which is connected with a compressor, having a air inlet opening, where the air inlet opening leads into the siphon tube; a curved drain pipe (14) with water buffer which is connected to the siphon tube, such that a water line is formed from the suction port through the suction pipe in the siphon tube towards a drain pipe; and a jacket tube divided centrally by a separating wall, which is closed at its one end with a bottom and passes into the drain tube at its other open end, which forms the suction pipe and the siphon tube. The separating wall at its lower edge, forms a connecting sheet at its apex between the siphon tube and suction pipe having a 360[deg] shaped pointed turning of the two perpendicular tubes leading upward, where the connecting bow the distance between the separating wall to the bottom of the jacket tube is approximately half the diameter of the jacket tube. The air inlet opening is located on or in the separating wall on the side of the siphon tube in the immediate vicinity of the vertex of the separating wall. The inlet pipe is closed through the suction port with a separation. The side opening of the drain pipe is reduced to approximately half of its pipe diameter, so that the water buffer is formed. The separating wall is formed as a center wall hollow body, where the volume of the hollow body is at least equal to the volume of the suction tube and the air from the hollow body of water can flow via system leaks at the compressor and/or unwanted side openings. An independent claim is also included for using clear water-air lifter with compressed air jack in a reactor with clear water phase, comprising introducing the compressed air through the pressure tube by the pressure air supply means into the hollow body for backwashing for a first rinsing process, until the water flows out through the air inlet opening and the deposited bacterial sludge-water mixture is displaced into the tube bottom by the U-shaped 360[deg] tube bend, and displacing the fluid through the inlet opening in the inlet pipe and conveying to return into the reactor, carrying out the second rinsing process by supplying compressed air through the air inlet opening so that air bubbles are formed in the siphon tube and the water column in the siphon tube is raised from the clear water phase of the reactor via the suction port and the siphon tube is lifted to guide the clear water from the lower edge of the outlet pipe, then the air supply is turned off, so that the water column flows downwards in the opposite direction in the siphon tube, supplying the compressed air at the point of the greatest hydraulic fluid in the siphon tube, so that the compressed air blowing through the connecting bow in the inlet pipe is diverted, where the suction pipe opens via the suction port into the reactor, a vacuum is generated temporarily in the siphon tube, and the water is conveyed into part through the inlet pipe and conveyed into the reactor through the suction port. The clear water flows into the jacket tube from the clarified water phase of the reactor after switching off the compressed air in the opposite direction and the clear water is filled such that the water column is lifted up in the siphon tube to the bottom of the discharge pipe.