Differences, Advantages and Disadvantages between Shell-and-Tube Heat Exchanger Maintenance and Plate Heat Exchanger Maintenance

- Sep 25, 2019-

Shell-and-tube heat exchangers and plate heat exchangers are commonly used and popular heat exchangers. Therefore, the maintenance of shell-and-tube heat exchangers and plate heat exchangers are relatively important issues for many customers. They also have different maintenance methods for heat exchangers. Here, Guangzhou jointly conducts data collation and analysis. Next:

Differences, Advantages and Disadvantages between Shell and Tube Heat Exchanger Maintenance and Plate Heat Exchanger Maintenance

Maintenance methods of shell and tube heat exchangers:

Because shell-and-tube heat exchanger is composed of tube bundles, and its own weight and volume are relatively large, it needs to leave the same length of tube bundles when repairing and extracting the tubes, so it occupies more land and needs to be equipped with necessary lifting and maintenance facilities, so its maintenance process is relatively troublesome and the maintenance time is also long.

The life of shell-and-tube heat exchanger is about 30 years when it is designed, and the overhaul period is about 4 years. If the leakage of heat exchanger occurs, it may be caused by the leakage between the tube and the tube sheet or the leakage caused by the rupture of the tube, the plugging method can be used to restore the working performance in a short time. The tube-and-shell heat exchanger allows 7% plugging. Margin. The rubber ball cleaning device can be used for regular mechanical cleaning of the tube according to the need. This maintenance method is relatively simple.

Maintenance method of plate heat exchanger:

Professional plate heat exchanger has the characteristics of small size, light weight, easy maintenance, and does not need to set up maintenance lifting facilities, so the installation occupies less space. Manual maintenance of plate heat exchanger includes folding the whole machine, cleaning plates and gaskets with water spray guns and brushes, checking plates and gaskets, and replacing plates and gaskets if necessary.

Plate heat exchangers are usually cleaned once a year, regardless of actual needs, so as to maintain the heat transfer efficiency of heat exchangers. When using cooling water with poor water quality, such as river water and seawater, there is a risk of surface pollution and blockage due to the existence of sediment and dirt and the rapid growth of microorganisms. In foreign countries, when river water is used as cooling water, the cleaning frequency is very high, averaging 3.3 times a year. Therefore, when using water source, heat exchangers should try to choose clean water source, which can not only prevent the damage of heat exchangers, but also reduce unnecessary cleaning, so as to achieve cost-saving effect.