Apparatus for the injection distribution and dispersion of sorbent in a utility boiler furnace
AssigneeThe Babcock & Wilcox Company
InventorsWadie F. Gohara, Kevin J. Rogers, Dennis K. McDonald
Life of this patent
Estimating the term…
Abstract
A system and method for distributing, injecting, and dispersing a sorbent mixture of sorbent and compressed filtered flue gas into the combustion furnace portion of a boiler furnace. Prior to injection into the combustion furnace, the sorbent mixture is heated with steam and distributed within the combustion furnace through a plurality of injection tubes having their ends arranged in a grid and oriented substantially toward the combustion furnace flue gas flow.
Claims8
An apparatus for injecting and distributing a sorbent into a flue gas flow in a furnace, comprising:
- conveying means for transporting a filtered flue gas from the furnace;
- a compressor having an inlet connected to the conveying means for receiving the filtered flue gas and an outlet for providing the filtered flue gas at a higher pressure;
- a hopper containing the sorbent, the hopper being connected to the outlet of the compressor for supplying sorbent to the filtered flue gas;
- mixing means connected to the hopper and to the outlet of the compressor for mixing the sorbent from the hopper with the filtered flue gas from the outlet of the compressor for creating a sorbent mixture;
- a plurality of injection tubes, each tube having an open end, said tubes protruding through a furnace wall of the furnace, and arranged parallel to each other in a grid pattern, each open end being located at substantially the same horizontal distance from said furnace wall and oriented in the furnace flue gas flow, the plurality of injection tubes having heating means for heating each injection tube with steam;
- and
- distribution means connected to the mixing means and the plurality of injection tubes for receiving the sorbent mixture from the mixing means and for providing the sorbent mixture to the plurality of injection tubes.
A method for injecting and distributing a sorbent into a flue gas flow in a furnace, comprising the steps of:
- conveying flue gas from the furnace;
- filtering the flue gas to form filtered flue gas;
- conveying the filtered furnace flue gas from the furnace to a compressor:
- compressing some of the filtered flue gas to form compressed filtered flue gas;
- mixing a sorbent with the compressed filtered flue gas to form a sorbent mixture;
- distributing the sorbent mixture to a plurality of injection tubes arranged in a grid pattern in the furnace;
- injecting the sorbent mixture into the furnace flue gas flow through the plurality of injection tubes;
- and
- heating the sorbent mixture with each injection tube with steam before the sorbent mixture is injected into the furnace flue gas flow through the plurality of injection tubes.
Dependencies are inferred from the claim text.