Process for separating sulfur compounds from flue gases
A process is described for the removal of gaseous sulfur compounds including sulfur dioxide from combustion gases formed in a combustion chamber containing such compounds, said process comprising: (a) introducing a pulverous alkaline-forming solid into the combustion chamber above the combustion zone to mix with the combustion gases to form a primary stream; (b) flowing the resulting primary stream of combustion gases comprising sulfur oxides and alkaline oxide solids into a reactor vessel containing a baffle column; (c) flowing the primary stream through the baffle column to separate said primary stream in said reactor vessel into one or more first streams containing substantially all of said oxide solids and one or more second streams substantially free of said solids; (d) flowing said first streams past spray nozzles to wet said first streams downstream of the separation of the primary stream into first and second streams; (e) combining said wetted first streams with said second streams to react hydroxides and sulfur oxides and produce a third stream containing substantially dry sulfates and sulfites; (f) collecting the dry sulfates or sulfites from the bottom of said reactor vessel; and (g) flowing the essentially desulfurized third stream out of said reactor vessel.
- Assignee:
- Oy Tampella AB, Tampere (Finland)
- Patent Number(s):
- A; US 5238666
- Application Number:
- PPN: US 7-745509
- OSTI ID:
- 6225571
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010800 -- Coal
Lignite
& Peat-- Waste Management
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
ALKALINE EARTH METAL COMPOUNDS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION CHAMBERS
COMBUSTION PRODUCTS
CONTROL
DESULFURIZATION
HYDROGEN COMPOUNDS
HYDROXIDES
MOISTURE
NOZZLES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SORBENT INJECTION PROCESSES
SULFATES
SULFITES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES