A detection method of heat exchanger tube bundle

Abstract

The invention discloses a detection method for a heat exchanger tube bundle, which belongs to the field of heat exchanger detection. The method includes: selecting a first number of heat exchange tubes from the heat exchange tubes in the first tube bundle area to obtain the first heat exchange tubes to be inspected, and the heat exchange tubes in the first tube bundle area include at least the outermost two turns of the heat exchanger. Heat pipe; select a second number of heat exchange tubes from the heat exchange tubes in the second tube bundle area to obtain a second heat exchange tube to be checked, and the second tube bundle area is the area of ​​the heat exchanger tube bundle area other than the first tube bundle area Area; detect the first heat exchange tube to be inspected and the second heat exchange tube to be inspected; the ratio of the sum of the first number and the second number to the total number of tubes of the heat exchanger is a predetermined value, and the predetermined value is less than 1 Positive number; the ratio of the first number to the number of heat exchange tubes in the first tube bundle area is the first ratio, the second number to the number of heat exchange tubes in the second tube bundle area is the second ratio, and the ratio of the first ratio to the second ratio is the set value, and the set value is a positive number greater than 1. The detection result of the present invention 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 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. A common practice is to sample a certain percentage of heat exchange tubes, such as 5% or 10%. However, how to select a certai...

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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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