Circulating dry scrubber system and method

A method of removing pollutants from a gas with a circulating dry scrubber system comprising a circulating dry scrubber reactor comprising a fluidized bed fluidically coupled to a housing comprising a filter array and an internal hopper within the housing, the method comprising:

• treating the gas with the circulating dry scrubber reactor by contacting the gas with a dry reagent within the fluidized bed, the dry reagent being effective to remove pollutants from the gas and thereby yield a scrubbed gas stream containing particulates comprising the dry reagent;
• directing the scrubbed gas stream exiting the circulating dry scrubber reactor between an interior of the housing and an exterior of the internal hopper, the exterior of the internal hopper being exposed to the scrubbed gas stream and the scrubbed gas stream is not recirculated to the circulating dry scrubber reactor to maintain the fluidized bed therein;
• and
• collecting particulates from the scrubbed gas stream with the filter array, wherein at least some of the particulates are received in the internal hopper and returned to the fluidized bed within the circulating dry scrubber reactor.