Method for the removal of sulphur oxides from a flue gas with a baghouse used as a secondary reactor
A method is described for removing sulfur oxides from a flue gas which includes: (a) introducing the flue gas containing sulfur oxides and particulates into a reactor; (b) contacting the flue gas with a calcium-based reagent to effect a neutralization reaction, thereby forming reaction products, the calcium-based reagent containing between 3-30% by weight of an alkaline metal cation salt based on the calcium compound in the reagent; (c) entraining the reaction products of the neutralization reaction and the particulates as solid in the effluent stream discharged from the quench reactor; (d) contacting the effluent stream with a gaseous stream having target particulates dispersed therein to promote inertial impaction between the entrained solids and the target particulates whereby the submicron solids entrained in the effluent stream are captured by the target particulates; (e) flowing the effluent stream into a collection zone; (f) accumulating the solids on a filter to form a bed of substantially non-tacky solids, some of the solids containing unreacted reagent; and (g) increasing the depth of the solids on the filter to provide at least a 40% removal of the sulfur oxides flowing into the collection zone.
- Assignee:
- Teller Environmental Systems, Inc., Shrewsbury, MA
- Patent Number(s):
- US 4581210
- OSTI ID:
- 5715278
- Resource Relation:
- Patent File Date: Filed date 9 Nov 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
42 ENGINEERING
BAGHOUSES
OPERATION
FLUE GAS
DESULFURIZATION
SULFUR OXIDES
REMOVAL
CALCIUM COMPOUNDS
CHEMICAL REACTORS
FILTERS
PARTICULATES
PH VALUE
REAGENTS
SOLIDS
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
EQUIPMENT
GASEOUS WASTES
OXIDES
OXYGEN COMPOUNDS
PARTICLES
POLLUTION CONTROL EQUIPMENT
SULFUR COMPOUNDS
WASTES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
424000 - Engineering- Pollution Control Equipment- (1980-1989)