Experimental study of dissolved oxygen’s effect on dissolved hydrogen analyzer of the main steam

Abstract

Abstract:

It is an effective method to monitor the high temperature oxidation rate of the inner wall of superheater and reheater tubes by using dissolved hydrogen analyzer to measure dissolved hydrogen content in main steam , which can warn the possible overheating or overheating deposit.However, it is found that in the actual operation, measurement accuracy of dissolved hydrogen analyzer is poor. The results of study show that the dissolved oxygen in water sample has obvious effect on the measurement of dissolved hydrogen. The smaller the dissolved hydrogen is, the more dissolved oxygen contains，and the greater the relative error of dissolved hydrogen analyzer makes. On the other hand, when the dissolved hydrogen content is constant, the actual value of the dissolved hydrogen analyzer has a linear relationship with the dissolved oxygen content.Therefore, dissolved oxygen may be an important factor affecting the measurement of dissolved hydrogen analyzer.

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font-size: 10.5pt, mso-spacerun: 'yes', mso-font-kerning: 1.0000pt">:main steam;the dissolved hydrogen analyzer, dissolved hydrogen, relative error of measurement, linear relationship

LI Haiyang，WANG Renlei，YOU Liangzhou，HENG Shiquan.

Experimental study of dissolved oxygen’s effect on dissolved hydrogen analyzer of the main steam [J]. Huadian Technology, 2019, 41(7): 27-30.

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Experimental study of dissolved oxygen’s effect on dissolved hydrogen analyzer of the main steam

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