US 9,808,762 B2
Predictive emissions monitor systems and methods
Walter Edgar Hayes, IV, Carl Junction, MO (US); Keith Alex Smith, Leander, TX (US); Eugene Boe, Austin, TX (US); and Dennis Tzyy-nian Yieh, Houston, TX (US)
Assigned to Rockwell Automation Technologies, Inc., Mayfield Heights, OH (US)
Filed by ROCKWELL AUTOMATION TECHNOLOGIES, INC., Mayfield Heights, OH (US)
Filed on Apr. 23, 2015, as Appl. No. 14/694,821.
Prior Publication US 2016/0310896 A1, Oct. 27, 2016
Int. Cl. B01D 53/86 (2006.01); B01D 53/92 (2006.01); B01D 53/90 (2006.01)
CPC B01D 53/8696 (2013.01) [B01D 53/8631 (2013.01); B01D 53/90 (2013.01); B01D 2251/2062 (2013.01); B01D 2251/2067 (2013.01); B01D 2258/0283 (2013.01)] 11 Claims
 
1. A method for operating a selective catalytic reduction unit, comprising:
tuning, using a control system, a selective catalytic reduction model to the selective catalytic reduction unit to describe expected relationship between operational parameters of the selective catalytic reduction unit and level of nitrogen oxide output from the selective catalytic reduction unit, wherein tuning the selective catalytic reduction model comprises:
instructing a combustion source that produces gaseous emissions comprising nitrogen oxide to operate at each of a plurality of load levels;
instructing the selective catalytic reduction unit to inject a reactant into the gaseous emissions output from the combustion source while operating at each of the plurality of load levels in accordance with an injection rate provided in vendor information;
determining an input nitrogen oxide level to and an output nitrogen oxide level from the selective catalytic reduction unit at each of the plurality of load levels; and
determining tuning parameters of the selective catalytic reduction model based at least in part on the input nitrogen oxide level, the output nitrogen oxide level, and the injection rate of the reactant at each of the plurality of load levels; and
after tuning the selective catalytic reduction model to the selective catalytic reduction unit:
predicting, using the control system, the level of nitrogen oxide expected to be output from the selective catalytic reduction unit based at least in part on the operational parameters of the selective catalytic reduction unit and the selective catalytic reduction model; and
controlling, using the control system, operation of the selective catalytic reduction unit based at least in part on the level of nitrogen oxide expected to be output from the selective catalytic reduction unit;
wherein tuning the selective catalytic reduction model comprises removing a sensor used to determine the output nitrogen oxide level at each of the plurality of load levels after determining the tuning parameters of the selective catalytic reduction model.