Decontamination of combustion gases in fluidized bed incinerators
US4346064A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 12, 1980 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Dec 12, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23G5/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Sulfur-containing atmospheric pollutants are effectively removed from exit gas streams produced in a fluidized bed combustion system by providing a fluidized bed of particulate material, i.e. limestone and/or dolomite wherein a concentration gradient is maintained in the vertical direction. Countercurrent contacting between upwardly directed sulfur containing combustion gases and descending sorbent particulate material creates a concentration gradient across the vertical extent of the bed characterized in progressively decreasing concentration of sulfur, sulfur dioxide and like contaminants upwardly and decreasing concentration of e.g. calcium oxide, downwardly. In this manner, gases having progressively decreasing sulfur contents contact correspondingly atmospheres having progressively increasing concentrations of calcium oxide thus assuring optimum sulfur removal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.