Selective catalytic NOx reduction process and control system
US8591848B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 2008 |
| Grant date | Nov 26, 2013 |
| Priority date | — |
| Expiry date | Jan 11, 2030 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J2219/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Disclosed is a system which enables the efficient utilization of urea for selective catalytic reduction (SCR) of NOx by gasifying it and feeding it to a plurality of selective catalytic reduction units associated with a plurality of gas turbines. The invention enables feeding a gasified product of the urea with the ability to fully control separate SCR units without excessive reagent usage or loss of pollution control effectiveness. Controllers determine the amount of reagent required for each turbine to control NOx emissions and then mixes the gasified urea with the correct amount of carrier gas for efficient operation of each separate SCR unit despite the demand variation between the turbines. In this manner the gasification unit can be properly controlled to provide urea on demand without the need for storing large inventories of ammonia-containing gasses to correct for fluctuations in demand.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.