Solids transport in flue gas desulfurization system
OwnerJeb W GAYHEART, Douglas R LORENZ +3inventors
InventorsJeb W GAYHEART, Douglas R LORENZ, James M MacINNIS, Eric S MILLER, Jonathan C ROTH
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Abstract
A solids transport system for use in a flue gas desulfurization system is disclosed. Flue gas can be recycled from downstream and used as a fluidizing gas for transporting solids between different locations. Exemplary systems include fluidization slide gravity conveyors, fluidization pads in bins, and in hoppers. The flue gas is generally already at an elevated temperature, reducing power consumption needed to heat the fluidizing gas.
Claims35
A flue gas desulfurization system, comprising:
- a main flue gas path that extends through an absorber vessel, a particle collection device downstream of the absorber vessel, and a stack;
- a solids transport system for recycling solid particles from the particle collection device to the absorber vessel, the solids transport system including at least one fluidized surface;
- and
- a flue gas recycle path having at least one take-off point that sends flue gas from the main flue gas path to the solids transport system, the flue gas being used as a fluidizing gas to produce the at least one fluidized surface.
A method for recycling solid particles in a flue gas desulfurization system that has a main flue gas path extending through an absorber vessel and a particle collection device downstream of the absorber vessel, comprising:
- separating solid particles from clean gas in the particle collection device;
- recycling solid particles from the particle collection device to the absorber vessel using a solids transport system that includes at least one fluidized surface;
- wherein recycled flue gas is sent from the main flue gas path to the solids transport system through a flue gas recycle path comprising at least one take-off point, and the recycled flue gas is used as a fluidizing gas to produce the at least one fluidized surface upon which the solid particles travel.
A flue gas desulfurization system, comprising:
- a main flue gas path that extends through a circulating dry scrubber absorber vessel, a particle collection device downstream of the absorber vessel, and a stack;
- a solids transport system for recycling solid particles from the particle collection device to the circulating dry scrubber absorber vessel, the solids transport system including at least one fluidized surface;
- and
- a flue gas recycle path having at least one take-off point that sends flue gas from the main flue gas path to the solids transport system, the flue gas being used as a fluidizing gas to produce the at least one fluidized surface.
Dependencies are inferred from the claim text.