Detection method for heat exchanger tube bundle

Abstract

The invention discloses a detection method for a heat exchanger tube bundle, and belongs to the field of heat exchanger detection. The method comprises the following steps: selecting a first number of heat exchange tubes from heat exchange tubes in a first tube bundle area to obtain first heat exchange tubes to be detected, wherein the first heat exchange tubes in the first tube bundle area at least comprise the outmost two circles of heat exchange tubes of a heat exchanger; selecting a second number of heat exchange tubes from heat exchange tubes in a second tube bundle area to obtain second heat exchange tubes to be detected, wherein the second heat exchange area is the area except for the first tube bundle area; detecting the first heat exchange tubes to be detected and the second heat exchange tubes to be detected, wherein the ratio of the summation of the first number and the second number to the total tube number of the heat exchanger is a preset value I, and the preset value Iis a positive number smaller than 1, the ratio of the first number to the number of the heat exchange tubes in the first tube bundle area is a first ratio, the ratio of the second number to the number of the heat exchange tubes in the second tube bundle area is a second ratio, the ratio of the first ratio to the second ratio is a preset value II, the preset value II is a positive number greater than 1. The detection result of the detection method is true.

Description

technical field [0001] The invention relates to the field of heat exchanger detection, in particular to a detection method for heat exchanger tube bundles. Background technique [0002] Heat exchangers are used to transfer heat between fluids. Heat exchanger is the most widely used equipment in petrochemical enterprises, accounting for about 25% of the total equipment, and the importance of its safe work is self-evident. During the maintenance period of petrochemical enterprises, an important task is the detection of heat exchangers. [0003] The detection of the heat exchanger is mainly to detect the damage of the heat exchanger tube bundle. Since a heat exchanger has hundreds or thousands of heat exchange tubes, and the downtime for maintenance is limited, it is unrealistic to perform eddy current testing on each heat exchange tube in the tube bundle. The usual practice is to sample a certain proportion of heat exchange tubes, such as 5% or 10%. However, how to select ...

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Problems solved by technology

[0004] In the process of realizing the present invention, the inventors found that the prior art has at least the following problems: Due to the fact that the distribution of damaged heat exchange tubes in the heat exchanger is not uniform, there are cases where the degree of damage in some areas is relatively high, Therefore, the method of uniform sampling cannot reflect the real damage of the heat exchanger tube bundle, and it is easy to miss inspection

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