Patent ID: 6579507
Filing Date: 2003-06-17
Classification: B01D,B01J,C22B,F23J,G05D,Y02C,Y02P,Y10S

Abstract:
A system for dry removal of oxides of sulfur (SOX) and/or oxides of nitrogen (NOX) from gases, comprising:A. a feeder containing a supply of sorbent of regenerable oxides of manganese and/or regenerated oxides of manganese; wherein the feeder is configured to handle and feed oxides of manganese which, upon regeneration, are in particle form and are defined by the chemical formula MnOX, where X is about 1.5 to 2.0 and wherein the oxides of manganese have a particle size of about 0.1 to about 500 microns and a BET value ranging from about 1 to about 1000 m2/g; B. a first bag house configured to receive sorbent and a gas containing SOX and NOX where the gas is introduced at temperatures ranging from ambient temperature to below the thermal decomposition temperature of sulfates of manganese and contacted with the sorbent for a time sufficient to primarily effect SOX capture at a targeted SOX capture rate set point of at least 99.0%, the SOX being captured by reacting with the sorbent to form sulfates of manganese to substantially strip the gas of SOX; C. a second bag house configured to receive sorbent and the gas that has been substantially stripped of SOX from the first bag house where the gas is introduced at temperatures ranging from ambient to below the thermal decomposition temperature of nitrates of manganese and is further contacted with sorbent for a time sufficient to primarily effect NOX capture at a targeted NOX capture rate set point of at least 96.0%, the NOX being captured by reacting with the sorbent to form nitrates of manganese to substantially strip the gas of NOX, and the second bag house being further configured to render the gas that has been substantially stripped of SOX and NOX free of reacted and unreacted sorbent so that the gas may be vented from the second bag house; and D. a controller for simultaneously monitoring and adjusting system operational parameters, the controller providing integrated control of system differential pressure and other operational parameters selected from the group consisting of NOX capture rate, SOX capture rate, gas inlet temperature, sorbent feed rate and any combination thereof, wherein differential pressure within the system is regulated so that any differential pressure across the system is no greater than a predetermined level, SOX is removed at a steady state removal rate of at least 99.0%, and NOX is removed at a steady state removal rate of at least 96.0%.