Process and apparatus for reducing pollutant emission in flue gases

Patent · Tue Apr 21 04:00:00 EDT 1992

OSTI ID:5018871

Khinkis, M J; Patel, J G; Rehmat, H G

This patent describes a combustion process for reducing at least nitrogen oxides, sulfur oxides and hydrogen chloride in a furnace. It comprises introducing a combustible material into a drying zone within a combustion chamber; supplying air to the drying zone for preheating, drying, and partially combusting the combustible material; advancing the combustible material to a combustion zone within the combustion chamber; supplying air to the combustion zone for further combusting the combustible material; advancing the combustible material to a burnout zone within the combustion chamber; supplying air to the burnout zone for final burnout of uncombusted portions of the combustible material; injecting one of a sorbent and a calcined sorbent, and a fuel into the combustion chamber above the combustible material to create an oxygen deficient secondary combustion zone; ejecting vitiated air from the burnout zone; injecting at least one of overfire air and the vitiated air into the combustion chamber above the oxygen deficient secondary combustion zone forming an oxidizing tertiary combustion zone for thorough mixing and final burnout of combustibles in combustion products of the combustible material; and removing ash from the combustion chamber.

• Assignee: Inst. of Gas Technology, Chicago, IL (United States)
• Patent Number(s): A; US 5105747
• Application Number: PPN: US 7-699164
• OSTI ID: 5018871
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
42 ENGINEERING
421000 -- Engineering-- Combustion Systems
54 ENVIRONMENTAL SCIENCES
540120* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (1990-)
AIR POLLUTION CONTROL
CHALCOGENIDES
CHEMICAL REACTIONS
CHLORINE COMPOUNDS
COMBINED SOXNOX PROCESSES
COMBUSTION CHAMBERS
CONTROL
DENITRIFICATION
DESULFURIZATION
FLUE GAS
FURNACES
GASEOUS WASTES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
SORBENT INJECTION PROCESSES
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
WASTES