The detachable plate heat exchanger is a type of plate heat exchanger. It has advantage of high heat transfer coefficient; easy to repair, easy to clean, low fouling coefficient, compact structure, small footprint, light weight, easy to change heat exchange area or process combination and small temperature difference at the end.What are the four common faults of plate heat exchangers?
(1) The heating temperature cannot meet the requirements: the main feature is that the outlet temperature is too low to meet the design requirements.
(2) Internal leakage: The main feature is that the medium with the higher pressure side is connected to the medium with the lower pressure side, and the pressure and temperature abnormality will occur in the system. If the medium is corrosive, it may also cause corrosion of the plate heat exchanger gasket. The stringing usually occurs at the flow guiding area or at the secondary sealing area.
(3) Large pressure drop: the pressure drop of the medium inlet and outlet exceeds the design requirements, and even higher than the design value many times, seriously affecting the system's requirements for flow and temperature. In the heating system, if the pressure drop on the hot side is too large, the primary side flow will be seriously insufficient, that is, the heat source is insufficient, and the secondary side outlet temperature cannot meet the requirements.
(4) External leakage: mainly manifested as leakage (small amount, discontinuous water droplets) and leakage (large amount, continuous water droplets). The main part of the external leakage is the seal between the plate and the plate, the two sealing leaking groove parts of the plate and the inner side of the end plate and the pressing plate.