Plate heat exchanger in the process of use, it is inevitable that there will be a variety of problems, these problems, a large part of it is caused by improper design, selection error, estimation error, but also part of it is due to the aging of plate heat exchanger original.
Causes:
① Due to improper selection of plate corrosion cracks or perforation.
② The operating conditions do not meet the design requirements.
③ Residual stress after cold stamping of the sheet and too small clamping size in assembly cause stress corrosion.
(4) There is slight leakage in the plate leakage groove, causing harmful substances in the medium to concentrate and corrode the plate, forming a string of liquid.
Treatment methods:
(1) Replace cracked or perforated plates, and find cracks in the plates with light transmission method on site.
② Adjust the operation parameters to meet the design conditions.
The clamping size of heat exchanger maintenance and assembly should meet the requirements, not the smaller the better.
(4) The plate material of plate heat exchanger is matched reasonably.
