How to check the cause of internal leakage of plate heat exchanger
After long-term use of the plate heat exchanger, some problems will inevitably occur. Today we come to understand the problem of internal leakage.
The internal leakage of the plate heat exchanger means that the two mediums in the heat exchange equipment leak from the high-pressure side to the low-pressure side for some reason. This kind of leakage is generally not easy to detect in time. The primary cause of this leakage is perforation, cracks and corrosion of the heat exchange plates. The way to find this kind of leakage is to frequently test the medium on the low-pressure side to distinguish it from the change in its composition.
The internal leakage of the plate heat exchanger is a phenomenon in which the high-pressure medium leaks to the low-pressure position inside the heat exchanger due to some reasons. If the internal leakage cannot be detected in time, it will cause perforation, cracks and corrosion of the heat exchange plate. The way to find this kind of leakage is to frequently test the medium on the low-pressure side to distinguish it from the change in its composition.
The method to check the shutdown of the internal leakage of the plate heat exchanger is to disassemble the plate heat exchanger, remove the dirt on the surface of the heat exchange plates, and assemble the heat exchanger from the beginning after drying. Perform a water pressure test with a pressure of 0.2~0.3Mpa on one side. Stop the experiment after the water flows out from the other side, disassemble the heat exchanger, and carefully observe the untested side of the heat exchange plate.
The heat exchange plate on the untested side is the plate with holes or cracks. The light-transmitting and coloring inspection methods can also be used on site to find out the problematic heat exchange plates. Any problematic heat exchange plates and heat exchange gaskets found out must be replaced and used after assembly from the beginning.
Through the above introduction, we understand that the reason for the internal leakage of the plate heat exchanger may be the failure of the equipment due to long-term failure to maintain. In order to avoid this problem, we must pay attention to the protection of the equipment during the use of the plate heat exchanger. .
