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US 8,709,348 B1Granted
Reduced sorbent utilization for circulating dry scrubbers
AssigneeBabcock Power Development LLC
InventorsJames K. Neathery, Angelos Kokkinos, James D. Dougherty, Matthew Quitadamo
Life of this patent
Estimating the term…
Abstract
Circulating dry scrubbing (CDS) systems and methods utilizes a particle classification unit operation to separate unreacted sorbent (such as lime, limestone, or sodium-based sorbent) such that a reactive fraction of the cut stream may be selectively recovered to a flue gas scrubbing system. This reduces the amount of fresh sorbent that must be supplied for pollutant removal.
Claims20
A circulating dry scrubber system comprising:
- a recycle diverter configured and adapted to be connected to a circulating dry scrubber reactor to receive sorbent particles therefrom for separating particles into:
- a recycle stream connected to the reactor for reuse in the reactor, and
- a purge stream;
- and
- a classifier operatively connected to receive particles from the purge stream, wherein the classifier is configured to separate particles from the purge stream into:
- a coarse solids recovery stream connected to recover coarse solids from the classifier and divert them into the reactor, and
- a waste stream for disposal of fine particles from the classifier.
4 more elements
A circulating dry scrubber system comprising:
- a circulating dry scrubber reactor configured to reduce pollutants from flue gas by passing flue gas through circulating particles of sorbent within the reactor;
- a particulate capture component in fluid communication with the reactor for filtering particles out of a stream of treated flue gas from the reactor;
- a classifier operatively connected to the particulate capture component to receive sorbent particles therefrom, wherein the classifier is configured to separate sorbent particles from the particulate capture component into:
- a coarse solids recovery stream connected to recover coarse solids from the classifier and divert them into the reactor, and
- a waste stream for disposal of fine particles from the classifier.
2 more elements
A circulating dry scrubber system comprising:
- a circulating dry scrubber reactor configured to reduce pollutants from flue gas by passing flue gas through circulating particles of sorbent within the reactor;
- a particulate capture component in fluid communication with the reactor for filtering particles out of a stream of treated flue gas from the reactor;
- a coarse solids recovery stream connected to recover coarse solids from the particulate capture component and divert them into the reactor;
- and
- a waste stream for disposal of fine particles from the classifier.
2 more elements
Dependencies are inferred from the claim text.