Analysis on Abnormal Rejects Discharge of a Medium Speed Pulverizer

Zhen Ning Zhao; Qing Feng Zhang; Wei Ying

doi:10.4028/www.scientific.net/AMR.516-517.539

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 516-517Analysis on Abnormal Rejects Discharge of a Medium...

Analysis on Abnormal Rejects Discharge of a Medium Speed Pulverizer

Abstract:

A series of abnormal phenomena emerging in normal operation conditions of the medium speed pulverizers in a 600 MW unit are introduced. The effects of the primary air (PA) mass flow and nozzle ring passage area on the pulverizer rejects (PRs) discharge are analyzed. The results indicate that the root cause of all these abnormal phenomena is the lower nozzle PA velocity led by the narrowed nozzle passage area during the nozzle ring reformation. The problem is solved by changing the nozzle ring back to the original one. The experiences in this document can provide evidence and reference for pulverizer operation adjustment and PA nozzle ring reformation design.

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Periodical:

Advanced Materials Research (Volumes 516-517)

Pages:

539-543

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.516-517.539

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Online since:

May 2012

Authors:

Zhen Ning Zhao, Qing Feng Zhang, Wei Ying

Keywords:

Primary Air Nozzle Ring, Primary Air Volecity, Pulverizer Rejects, Thermal Power Engineering, ZGM Medium Speed Pulverizer

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References

[1] Yue Junfeng, Huang Lei, Chen Huagui. MPS pulverizer work characteristic test [J]. journal of engineering for Thermal energy and power. 2005, 16 (1) : 65 ~ 68.

Google Scholar

[2] Xu Guiqin, Chen Zhao, Long Hui. Selection mode of mid-velocity mill on 600MW unit [J]. Jilin Electric power, 2001, (6) : 31 ~ 33.

Google Scholar

[3] WangLiYing. Main problem and countermeasure of medium speed coal pulverizer for large boiler [J]. Power system engineering. 2002, 18 (1) : 11 to 15.

Google Scholar

[4] ShiXueFeng, FengBo. Present situation of blended coal and coal quality control measures[J]. Coal technology. 1998, 3 (2) : 20 to 23.

Google Scholar

[5] Sa yinglu, Zhang Jun, Sheng Changdong, et al. Stable Combustion for Pulverized Coa1 fired Boilers and Coal blended 0ptimization [J]. Jiangsu electrical engineering. 2005, (6) : 15 to 17.

Google Scholar

[6] Xiaojie ZHANG, Qihong NIAN, Saozheng SUN, et al: A Study of Thermobalance Model for the Burning of Blended Coals[J]. J.of Engineer for Thermal Energy and Power Vol 15(2000), p.356.

Google Scholar