Filter apparatus with reverse flow cleaning
US4278454A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 29, 1979 |
| Grant date | Jul 14, 1981 |
| Priority date | — |
| Expiry date | May 29, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2201/313
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Cartridge type filters are suspended in hopper. Contaminated air flows into the hopper, passes through the filters and clean air is removed through an exhaust duct. Periodically a reverse stream of compressed air is directed through an inductor unit into each filter from the exhaust side to pressurize the filters and clean contaminants from the outer surface of the filter medium. With reference to the flow of the reverse stream, the walls of the inductor flare generally on a taper upstream from a restricted throat to a generally bowl-shaped section which flares to a diameter greater than the diameter of the throat. The bowl-shaped section extends upstream to merge with an arcuate section of a bell-mouth inlet which is convex to the exhaust chamber and terminates in a lateral flanged end. The throat is generally arcuate and convex to the inductor interior. The reverse stream, coming from a nozzle above each inductor, does not impinge on the inductor interior walls until it reaches an area immediately upstream of the throat. Air aspirates into the unit over the bell-mouth section and is accelerated and merged with the main reverse stream passing through the throat into the filters. T…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.