Measurement precision calibration method for measurement device for deposition quantity of oxide scales in boiler pipe

Abstract

The invention discloses a measurement precision calibration method for a measurement device for deposition quantity of oxide scales in a boiler pipe. The measurement device includes an ultrasonic emission probe and an ultrasonic receiving probe. The method includes the steps of: 1) firstly customizing a standard sample bottle, which has the same size and specification as a to-be-detected part of the boiler pipe; 2) adding the oxide scale, at a preset amount, into the standard sample bottle and filling the standard sample bottle with water fully, horizontally arranging the standard sample bottle and coating the external wall thereof with a coupling agent, and clamping the ultrasonic emission probe and the ultrasonic receiving probe on the bottle; 3) turning on the measurement device to obtain a measurement result of the deposition quantity of oxide scale in the standard sample bottle; and 4) if the measurement result is not equal to the preset amount, calibrating the measurement device. The calibration method can accurately calibrate the measurement precision of the measurement device for oxide scale in the boiler pipe and is simple and convenient. The calibrated measurement device can perform measurement to the deposition quantity of the oxide scale in the boiler pipe more accurately, thus improving work efficiency and estimating the service life of the boiler pipe.

Description

technical field [0001] The invention relates to the technical field of non-destructive testing, in particular to a method for correcting the measurement accuracy of equipment for measuring the amount of oxide scale deposition in boiler tubes. Background technique [0002] Thermal power plant units operate in a high-temperature environment for a long time. Since the high-temperature boiler tubes are under high pressure and the operating temperature is within the creep temperature range, after the boiler tubes are put into use, the inner wall of the boiler tubes will be rapidly oxidized in the superheated steam mixture environment. . At the same time, under the conditions of ultra-high temperature, large temperature fluctuations or large pressure fluctuations, the oxidation of the inner wall of the boiler tube will form a multi-layer film. This multi-layer film greatly accelerates the oxidation rate on the one hand, and blocks The heat exchange between the medium in the tube ...

AI Technical Summary

Problems solved by technology

However, in the actual measurement process, due to the human error of the instrument itself and the operator, the measurement results will be affected, and the existing measurement methods cannot guarantee the accuracy of the measurement results.

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