The internal leakage of the plate heat exchanger refers to the leakage of the high-pressure side medium to the low-pressure side due to some reasons. This leakage phenomenon is generally not easy to find in time. The main cause of such leakage is perforation, cracking and corrosion of the sheet. The method of finding such a leak is to constantly test the medium on the low pressure side and judge from the change in its composition.
Shutdown inspection method for internal leakage of plate heat exchanger:(1) Disassemble the plate heat exchanger and remove the dirt on the surface of the plate, then reassemble the heat exchanger after drying. A water pressure test with a pressure of 0.2 to 0.3 MPa was performed on one side. The test is stopped after the water is discharged from the other side. Open the heat exchanger and carefully observe the untested side of the plate, where the wet plate is a plate with holes or cracks.(2) At the scene, light transmission and coloring inspection methods can also be used to find waste sheets.