Separation system including a floatation tank having level control means
US4563274A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 1984 |
| Grant date | Jan 7, 1986 |
| Priority date | — |
| Expiry date | Aug 20, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B14/462
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An aqueous solution carrying paint solids is fed through an inlet into a floatation tank. The clean liquid exits through an orifice whose size is controlled by a movable gate. The level of the liquid within the tank is sensed by an ultrasonic rangefinder and the distance signals output from this rangefinder are fed to an electronic controller. During normal operation, this controller periodically supplies power signals to an electric actuator to adjust the position of the gate whereby the level of the liquid in the tank can be maintained substantially at the a first predetermined level. The controller may also include means for causing the liquid to rise to a second predetermined level after a preset time such that the paint solids are transferred over a weir into a collecting vessel. Thereafter the liquid level is caused to rapidly drop and is again maintained at the first level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.