System and method for sequential injection of reagent to reduce NOx from combustion sources
US9869226B2 · kind B2 · utility
3Cited by
13References
24Claims
0Family size
Assignee
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Key dates
| Filing date | May 30, 2014 |
| Grant date | Jan 16, 2018 |
| Priority date | — |
| Expiry date | Apr 28, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
In a large exhaust duct from a lean burn combustion source, such as a boiler, diesel engine or gas turbine, multiple injectors can be used to inject a reagent, such as an aqueous solution of urea or ammonia, into the exhaust for use in the catalytic reduction of NOx in a process known in the art as selective catalytic reduction (SCR). When operating at low injection rates, such as during low combustor loads, the injectors are operated individually for short periods of time in a sequential manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.