Oxidation tank control valve assembly and systems and methods for replenishing a charge of oxygen-containing gas within an oxidation tank
US7491321B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 18, 2006 |
| Grant date | Feb 17, 2009 |
| Priority date | — |
| Expiry date | Mar 16, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86493
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Contaminants are removed from fluid in a system where the fluid is sprayed into an air head at the top of a tank through a diffuser and withdrawn through a pick-up tube. A solenoid valve operates to allow oxygen-containing gas from a compressed gas source to flow into the tank through a shuttle valve, which is opened by the gas pressure. Simultaneously, a drain valve connected to the shuttle valve opens a drain, venting water and air from the tank. The solenoid valve also operates to close the gas supply line and connect the shuttle valve through a vent to atmosphere. Pressure within the tank closes the shuttle valve, which in turn closes the drain valve and disconnects the shuttle valve from the tank. A one-way-flow valve prevents fluid or gas from flowing from the tank backwards through the shuttle valve to the solenoid valve and out the vent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.