Judgment of heat exchanger leakage

Leaks in the heat exchanger tube bundle in Section 1 can be detected using a stethoscope. 2 Oil/water media can be sampled for analysis. Leakages in heat exchangers with 3-phase similarity (feed/tower bottom) are generally difficult to detect; it’s better to wait until the next major maintenance in three years

For internal leakage and cross-contamination of oil products due to water cooling, it is possible to analyze the reaction products and the heat exchange with the raw materials, as well as to examine their properties

Leaks in the heat exchanger tube bundle in Section 1 can be detected using a stethoscope. 2 Oil/water media can be sampled for analysis. For a heat exchanger with 3-phase similarity (feed/tower bottom) leakage, conduct a full analysis of the raw material and also a full analysis of the finished product, and then it can be put into use

Reduce the feed flow based on pressure, and then take samples for analysis.

It is mainly determined through before-and-after sampling analysis

Heat exchange efficiency, such as changes in temperature compared to normal levels； Flow variation ； Component changes ； Pressure changes.

I’ve encountered heat exchanger leaks a few times. Based on the analysis requirements for the media before and after the heat exchanger, the changes in heat exchange temperature, as well as a comparison with previous analyses, it is possible to determine a rough range initially. For example, in the isobutane dehydrogenation heat exchanger, the feedstock contains a high amount of isobutane; after the reaction, this isobutane is essentially converted into isobutylene. Since the pressure of the feedstock is higher than that of the reaction system, any leakage in the heat exchanger can result in a significant decrease in the concentration of isobutylene in the products after the reaction, a reduction in the temperature difference for heat exchange, and a decrease in the fuel consumption of the heating furnace. Circulating water coolers generally determine the direction of leakage based on the pressure difference between water and the medium; if the pressure of the medium is high, the circulating water is drained or the water quality is checked in the tank. If the pressure of the circulating water is high, it is necessary to check whether subsequent systems or products contain water.

Online PH monitoring for steam condensate design

Experience is important; at the same time, preventive measures must be taken in operation management. There should be no gaps in laboratory analysis, and production analysis must be carried out promptly