| US 7,491,321 B1 | ||
| Oxidation tank control valve assembly and systems and methods for replenishing a charge of oxygen-containing gas within an oxidation tank | ||
| Edward T. Maas, Poynette, Wis. (US); Paul A. Beres, Waukesha, Wis. (US); Kevin A. Hellenbrand, Mukwonago, Wis. (US); William M. Kavey, Sun Prairie, Wis. (US); and Daniel A. Klein, Middleton, Wis. (US) | ||
| Assigned to Hellenbrand, Inc., Waunakee, Wis. (US) | ||
| Filed on Jul. 18, 2006, as Appl. No. 11/458,279. | ||
| Int. Cl. B01D 21/30 (2006.01) | ||
| U.S. Cl. 210—136 [210/278; 210/138; 210/198.1; 210/205; 210/209; 210/220; 210/418; 137/488; 137/511; 137/624.13; 137/625] | 27 Claims |
| 1. An aeration control apparatus, usable with an aeration tank having an interior, and a compressed gas source that supplies
compressed oxidizing gas, the aeration control apparatus comprising:
a first valve, having
a first position disconnecting the compressed gas source from a first flow passage and connecting the first flow passage to
an atmospheric exhaust, and
a second position connecting the compressed gas source to the first flow passage and disconnecting the first flow passage
from the atmospheric exhaust,
a valve housing having at least one interior chamber, the first flow passage fluidly connecting the first valve to a first
interior chamber of the at least one interior chamber;
at least one one-way-flow valve, a first one-way-flow valve located between the first interior chamber and the interior of
the aeration tank, the first one-way-flow valve oriented to allow the compressed oxidizing gas to flow from the first interior
chamber to the interior of the aeration tank and to preclude gas or fluid from flowing from the interior of the aeration tank
to the first interior chamber; and
a controllable actuator operatively connected to the first valve and having a first state usable to place the first valve
in the first position and a second state usable to place the first valve in the second position, wherein the controllable
actuator is operable to repeatedly switch between the first state and the second state.
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