Gas stream clean-up filter and method for forming same
US5198002A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 12, 1992 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Mar 12, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2273/12
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A gas cleaning filter is formed in-situ within a vessel containing a fluidizable bed of granular material of a relatively large size fraction. A filter membrane provided by a porous metal or ceramic body or such a body supported a perforated screen on one side thereof is coated in-situ with a layer of the granular material from the fluidized bed by serially passing a bed-fluidizing gas stream through the bed of granular material and the membrane. The layer of granular material provides the filtering medium for the combined membrane-granular layer filter. The filter is not blinded by the granular material and provides for the removal of virtually all of the particulates from a process gas stream. The granular material can be at least partially provided by a material capable of chemically reacting with and removing sulfur compounds from the process gas stream. Low level radioactive waste containing organic material may be incinerated in a fluidized bed in communication with the described filter for removing particulates from the gaseous combustion products.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.