US 11,883,776 B2
Systems and methods for removal of mercury and/or hydrochloric acid from gas streams using calcium-containing particles
Harold Wayne Lee, II, Ogden, UT (US); Laura L. Kinner, Littleton, NC (US); Douglas C. Murdock, Oak City, UT (US); Fred Douglas Blackham, South Jordan, UT (US); and John B. Heintzelman, Draper, UT (US)
Assigned to Graymont (PA) Inc., Pleasant Gap, PA (US)
Filed by Graymont (PA) Inc., Pleasant Gap, PA (US)
Filed on Dec. 21, 2020, as Appl. No. 17/128,872.
Application 17/128,872 is a division of application No. 16/029,280, filed on Jul. 6, 2018, granted, now 10,898,851.
Claims priority of provisional application 62/541,604, filed on Aug. 4, 2017.
Prior Publication US 2021/0106942 A1, Apr. 15, 2021
Int. Cl. B01D 53/02 (2006.01); B01D 53/10 (2006.01); B01D 46/02 (2006.01); F23J 15/02 (2006.01); F23J 15/04 (2006.01); F23J 15/06 (2006.01); F23J 15/00 (2006.01); B01D 53/68 (2006.01); F23J 15/08 (2006.01); B01D 53/30 (2006.01); B01D 53/64 (2006.01)
CPC B01D 53/10 (2013.01) [B01D 46/02 (2013.01); B01D 53/30 (2013.01); B01D 53/64 (2013.01); B01D 53/685 (2013.01); F23J 15/003 (2013.01); F23J 15/006 (2013.01); F23J 15/025 (2013.01); F23J 15/04 (2013.01); F23J 15/06 (2013.01); F23J 15/08 (2013.01); B01D 2251/404 (2013.01); B01D 2251/602 (2013.01); B01D 2251/604 (2013.01); B01D 2253/102 (2013.01); B01D 2253/112 (2013.01); B01D 2253/1124 (2013.01); B01D 2257/2045 (2013.01); B01D 2257/602 (2013.01); B01D 2258/0233 (2013.01); B01D 2258/0283 (2013.01); B01D 2259/40001 (2013.01); F23J 2215/30 (2013.01); F23J 2215/60 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A system for removing one or more air pollutants from a gas stream of an industrial facility, the system comprising:
an industrial apparatus configured to produce a gas stream having a plurality of calcium-containing particles and one or more air pollutants, the pollutants including at least one of mercury (Hg) or hydrochloric acid (HCl),
a cooling apparatus downstream of the industrial apparatus and positioned to receive at least a portion of the gas stream, wherein the cooling apparatus is configured to cool the gas stream, and wherein the cooled calcium-containing particles are configured to adsorb a portion of at least one of the Hg or HCl;
a temperature sensor positioned downstream of the cooling apparatus and configured to measure a temperature of the cooled gas stream;
a controller in communication with the temperature sensor and the cooling apparatus, wherein the controller is configured to cause the cooling apparatus to cool the gas stream, based on the measured temperature, to about 250-350° F.; and
a filtering system downstream of the cooling apparatus and positioned to receive the cooled gas stream, wherein the filtering system is configured to remove at least a portion of the calcium-containing particles having adsorbed Hg or HCl.