| 摘要 |
<p>A method for correcting for the acid strength values calculated from drifting vibration measurements taken from a spent acid line by a vibration frequency mass flowmeter. The invention involves determining the differential between the acid strength value calculated from in situ measurements taken by a vibration frequency mass flowmeter on a spent acid line and a laboratory-determined strength of a spent acid sample taken substantially contemporaneously with the in situ measurements. Subsequent acid strength values calculated from subsequent in situ measurements are biased from about 1 % to 100 % of the differential.</p> |
