Method and apparatus for guiding process gas in a filter
US5178652A · kind A · utility
Inventor
Key dates
| Filing date | Sep 12, 1991 |
| Grant date | Jan 12, 1993 |
| Priority date | — |
| Expiry date | Sep 12, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J8/006
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a fluidized bed apparatus a process gas flows through a process chamber (46) and subsequently through a filter group, including a total number of at least two filter cartridges (50), while a respective part of the number of filter cartridges (50) is blocked, in rotation, to the gas flow coming from the process chamber (46) and is passed instead in opposite direction by a purging gas. An overall quantity of process gas exceeding the gas demand in the process chamber (46) at the ratio of the partial number mentioned to the total number of filter cartridges (50) is supplied to the apparatus. The exceeding partial amount of process gas is branched off in the apparatus ahead of the process chamber (46), passed as purging gas through the partial number mentioned of filter cartridges (50), and subsequently discharged through the remaining number of filter cartridges (50) together with the residual quantity of process gas coming from the process chamber (46). In this manner dust can be removed from the process gas at low expenditure for energy and with little noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.