Apparatus for controlling foam
US5922112A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Sep 15, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D19/04
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A system for automatically delivering an anti-foaming agent to a biological aste treatment system includes a sensor for monitoring the amount of foam present in the system, a pump for pumping a predetermined quantity of anti-foaming agent into the system, and a controller for initiating the pumping sequence when the quantity of foam in the system reaches a preselected level. The controller includes two relays. The first relay controls the length of time the pump is on, thereby controlling the amount of anti-foam injected into the system, and the second relay establishes a period of time following the pumping period when the pump cannot be activated, thereby providing a period of time for the anti-foam to break down the foam before additional anti-foam can be added.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.