Ⅰ. The structure of
Plate Heat Exchanger and
Shell And Tube Heat Exchanger Plate heat exchanger, as the name implies, is composed of a series of metal plates (geometric figures are different in different working conditions), or separated by sealing gaskets, or welded, its temperature range and pressure The ranges are different, and the selection is mainly based on the working condition data.
The shell and tube heat exchanger is welded by a series of steel pipes according to certain rules.
Ⅱ. The comparison between the two
1. Plate replacement is better than tube replacement in several aspects:
1) High heat exchange efficiency, small heat loss and high waste heat recovery rate;
2) Small footprint;
3) Low cost;
4) Easy maintenance and cleaning. Although the fully
Welded Plate Heat Exchanger needs to be cleaned online, but for the high content of impurities in the heat exchange medium, although the wide channel plate heat exchanger can be used, but it is not visible, a detachable welded plate heat exchanger has been developed. The shell can be disassembled to clearly see the blockage between the plates. Therefore, it is widely used in the chemical industry.
2. The tube and tube heat exchanger is superior to the plate exchanger:
1) The pressure bearing capacity is better than that of the plate changer;
2) Not easy to block. But the problem is that it is not easy to clean after clogging.
Ⅲ. Can only one of the plate heat exchanger and the tube heat exchanger be used under one working condition?
I think most users are not very clear about this issue, so here I want to explain it to you in the form of a case.
Case 1: High-salt wastewater evaporation and crystallization project
In a project like this, shell and tube heat exchangers and plate exchangers can be used at the same time, but play different roles.
For example, the plate heat exchanger can play the role of preheating and condensation inside, and the tube heat exchanger can play the role of heating. It still depends on the specific situation to choose which one to use.
Case 2: Exported oil drilling platform
According to the content of the heat exchange medium and the pressure bearing capacity, the two heat exchangers can be used at the same time, but the functions are different. After all, tube and tube heat exchangers are difficult to block but also difficult to maintain and clean. Although plate heat exchangers are easy to block, they are also easy to maintain and clean.
Regardless of whether it is a plate heat exchanger or a tube heat exchanger, the purpose is to choose economical and practical heat exchange equipment for users. This is a problem that heat exchanger manufacturers should consider, and it is also an urgent need for users in the current period of energy shortage and soaring prices.
January 06, 2023
