Paint-sludge filtration system featuring pool aeration using high-pressure discharge from filter vacuum producer
US6761820B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 13, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Jan 22, 2023 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B14/462
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A paint overspray particulate filtration system includes a collection tank, a floatation consolidation tank, and a vacuum filter assembly having a filter medium that traverses a pair of vacuum chambers. A positive displacement vacuum producer for the first vacuum chamber discharges a first supply of pressurized air at a temperature preferably greater than about 170° F. and a pressure preferably greater than about 6 psig, while a centrifugal compressor discharges a second supply of pressurized air at a temperature of perhaps up to 110° F. and at a pressure of perhaps 4 psig. The first pressurized air supply is heat exchanged with the second pressurized air supply, whereupon the cooled first pressurized air supply is directed through a submerged diffuser nozzle to aerate the collection tank and/or the consolidation tank. The warmed second pressurized air supply is directed onto the paint sludge carried atop the filter medium to enhance sludge dewatering.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.