Apparatus for acid gas emission control
US5624644A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1994 |
| Grant date | Apr 29, 1997 |
| Priority date | — |
| Expiry date | Nov 2, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2258/0283
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An improved apparatus and process is provided for scrubbing sulphur oxide gas from combustion flue gas with wet limestone particles as a reactive scrubbing agent. The process is carried out in a moving bed reactor having louvered inlet and outlet sides which permit the flue gas to pass through the reactor while the limestone particles move downward. The flue gas may be flowed through the moving bed reactor at a high velocity to permit scrubbing of large volumes of gas in a thorough and efficient manner. The high velocity of flue gas passing through the reactor causes some of the scrubbing particles to be ejected from the outlet side of the reactor. Problems associated with the ejection of the scrubbing particles are avoided by providing a slot alongside the outlet side or the reactor. The slot is sized so that the flue gas passing therethrough will have insufficient velocity to entrain the ejected scrubbing particles therein. Consequently, the particles will fall to the bottom of the slot where they can be recovered and recycled. As a result of the slot associated with each reactor, the apparatus may be operated under conditions which would not otherwise be possible so that the scr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.