nvestigation of the Performance of a 660-MW Supercritical Boiler in Terms of NOx Emission and Enhancing the Thermal Efficiency by Optimizing the Air Distribution System
By: Gavirineni, N. K
.
Contributor(s): Gundabattini, E.
Publisher: Pune Springer 2022Edition: Vol,103(5), Oct.Description: 1155–1168p.Subject(s): Mechanical EngineeringOnline resources: Click here
In:
Journal of the institution of engineers (India): Series CSummary: paper presents an in-depth experimental evaluation conducted on a 660-MW supercritical boiler having a steam generation of 1917 tonnes and a steam pressure of 242 kg/cm2. Significant parameters affecting the performance of boilers are analyzed, viz. size of coal, various air distribution nozzles through primary air (PA) nozzles with coal flow, concentric firing secondary air (CFS) nozzles, direct flow secondary air (DFS) nozzles, over-fire air (OFA) nozzles, and excess air ratio. The other parameters affecting the performance of the boiler and causing environmental pollution are also discussed, viz. the quality of coal, water quality, excess air. The analysis indicates that the NOx emissions are decreased to 238 mg/m3 from 300 mg/m3, and boiler performance is increased to 86.628% from 83.435% through modified combustion processes. Finally, the analysis indicates that the un-burnt carbon in fly ash decreases from 2.85 to 1.32% volumetrically through these novel combustion processes. This paper also recommends that the fly ash obtained through this combustion process could be used in other industrial applications like cement manufacturing and fly ash brick manufacturing.
| Item type | Current location | Call number | Status | Date due | Barcode | Item holds |
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Articles Abstract Database
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School of Engineering & Technology Archieval Section | Not for loan | 2023-0920 |
paper presents an in-depth experimental evaluation conducted on a 660-MW supercritical boiler having a steam generation of 1917 tonnes and a steam pressure of 242 kg/cm2. Significant parameters affecting the performance of boilers are analyzed, viz. size of coal, various air distribution nozzles through primary air (PA) nozzles with coal flow, concentric firing secondary air (CFS) nozzles, direct flow secondary air (DFS) nozzles, over-fire air (OFA) nozzles, and excess air ratio. The other parameters affecting the performance of the boiler and causing environmental pollution are also discussed, viz. the quality of coal, water quality, excess air. The analysis indicates that the NOx emissions are decreased to 238 mg/m3 from 300 mg/m3, and boiler performance is increased to 86.628% from 83.435% through modified combustion processes. Finally, the analysis indicates that the un-burnt carbon in fly ash decreases from 2.85 to 1.32% volumetrically through these novel combustion processes. This paper also recommends that the fly ash obtained through this combustion process could be used in other industrial applications like cement manufacturing and fly ash brick manufacturing.
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