Analysis on High Rates of Scaling and Salt Accumulation of 600MW Supercritical once-through Boiler

Xiao Ni Zhang; Xian Min Li; Chang Ming Li

doi:10.4028/www.scientific.net/AMM.166-169.620

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 166-169Analysis on High Rates of Scaling and Salt...

Analysis on High Rates of Scaling and Salt Accumulation of 600MW Supercritical once-through Boiler

Abstract:

The chemistry check-ups were reviewed in the first maintenance of 600 MW supercritical once-through boiler units in Henan. Several problems were found: (1) high rates of scaling on the waterwall and economizer; (2) high rates of salt deposition on the turbine blades; (3) the formation of salt deposits on blades were complicated; (4) corrosion of low pressure turbine blades in period of maintenance was a universal phenomenon; (5) FAC (flow-accelerated corrosion) were most frequent in HP heaters and HP drain lines in most fossil plants. The reasons have been analyzed and the suggestions have been provided.

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Periodical:

Applied Mechanics and Materials (Volumes 166-169)

Pages:

620-626

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.166-169.620

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Online since:

May 2012

Authors:

Xiao Ni Zhang, Xian Min Li, Chang Ming Li

Keywords:

Corrosion, Deposit, Feedwater Treatment, Fossil Plant Availiability, Supercritical Once-Through Boiler

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References

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