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US 7,404,940 B2Granted
Method for flue-gas reduction of pollutants in combustion processes
AssigneeMobotec USA, Inc.
InventorsBrian S. Higgins, Mark Shilling, Edwin Haddad
Life of this patent
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Abstract
Systems and methods for reduction of pollutants in combustion processes using combined rotating opposed fired air (ROFA) and fuel injection sorbents (FSI) for increased chemical reactivity.
Claims25
A method of reducing SO2 flue gas concentration in a combustion process utilizing a sulfurous fuel, comprising the steps of:
- providing a staged combustion system for application in a reactor, the staged combustion system having asymmetrical injection devices for introducing at least one sorbent to the reactor by asymmetrical injection at predetermined, spaced apart locations;
- injecting the fuel with a primary air through a first stage prior to injection of a secondary air;
- injecting the secondary air and at least one sorbent through the injection devices;
- and
- controlling the asymmetrical injection of the secondary air to produce a turbulence resulting in dispersion of the sorbent into the reaction system, thereby providing increased reaction and reactor efficiency and reduced SO2.
2 more elements
A method for reducing pollutant formation, comprising the steps of:
- providing a staged combustion system including at least one FSI stage, and a furnace with asymmetrical injection ports introducing at least one sorbent to the furnace by asymmetrical injection at predetermined, spaced apart locations;
- injecting the fuel with a primary air through a first stage prior to injection of a secondary air;
- injecting secondary air and at least one sorbent through the injection ducts;
- and
- controlling the asymmetrical injection of secondary air to produce a turbulence resulting in dispersion of the sorbent into the furnace, thereby providing increased reaction and reactor efficiency and reduced NOx formation.
2 more elements
A method of reducing pollutant flue gas concentration in a combustion process utilizing a sulfurous fuel, comprising the steps of:
- providing a staged combustion system for application in a reactor, the staged combustion system having asymmetrical injection devices for introducing at least one sorbent to the reactor by asymmetrical injection at predetermined, spaced apart locations;
- injecting the fuel with a primary air through a first stage prior to injection of a secondary air;
- injecting the secondary air and at least one sorbent through the injection devices;
- and
- controlling the asymmetrical injection of the secondary air to produce a turbulence resulting in dispersion of the sorbent into the reaction system, thereby providing increased reaction and reactor efficiency and reduced SO2;
- wherein the staged combustion system includes ROFA and FSI in combination for providing increased reactivity within a predetermined zone of the reactor, thereby producing more complete, more effective, and more efficient reduction of pollutants therein.
3 more elements
Dependencies are inferred from the claim text.