1, fouling fouling can lead to reduced heat transfer coefficient of heat transfer equipment, there will be serious blockage plate channel. Plate plate heat exchanger is designed with a large number of points of support, seeks to play a spoiler media (the media turbulence to improve heat transfer coefficient) and bearing supporting role, is the solid matter and fibers are easily gathering place, its Side effects are the fluid to form a local stagnation and generate dirt buildup, calcium and magnesium ions in the medium after a suitable temperature in the precipitation and buildup easily grow attached to form a honeycomb-like scale.
Clogged with fouling on the causes are different, but in the plate heat exchanger is the same as the impact of the phenomenon. There are the following measures can be taken to alleviate the structural problems:
(1) plate heat exchanger should not be used in a dirty environment or easy to scale (unless other additional measures valid).
(2) use of non-softened water for cooling the cooling medium, the operating temperature should be controlled at about 50 ℃ or less, to avoid temperature-sensitive medium precipitated calcium and magnesium ions.
2, the pressure on the demolition plate heat exchanger leak occurs when you use within the rated working pressure, in addition to manufacturing and assembly facilities in terms of quality factors, mainly related to abnormal impact loads occurring in the system related (water hammer, hammer), this is a general operator easily observed phenomenon. Instantaneous peak pressure shocks caused by the often 1-3 times higher than normal operating pressure, the rubber mounted plate heat exchanger gaskets shift, resulting in seal failure.