Plate heat exchanger is a kind of high-efficiency heat exchange equipment, which has the advantages that other heat exchange equipment cannot match. Plate heat exchangers also have some disadvantages, such as the pressure cannot exceed 2.5Mpa, the temperature cannot exceed 250 degrees Celsius, and large particles and long fibers cannot be exchanged. It can not be used for extremely corrosive conditions. Analysis of the reasons for the abnormal situation of the plate heat exchanger.
1 Heat exchange abnormality of heat exchanger
(1) The cold side flow is small, etc.
(2) The cold side outlet temperature is too low, the main reason is that the hot side flow is small or the temperature is lower than the design value, or the plate is blocked.
2 plate heat exchanger leaks
(1) The main reason for the leakage during shutdown is that the heat exchanger is frequently started and stopped, and the normal working condition is restored.
(2) The main causes of internal leakage are damage to the gasket and corrosion and perforation of the plate.
(3) The main causes of leakage are misalignment, extrusion, damage to the gasket, corrosion and deformation of the plate, and the pressure is not compressed to the specified clamping size.
(4) The leakage between the blind plate and the clamping plate is mainly due to the blind plate being penetrated by a hard object
3 abnormal pressure drop is that the pressure drop is greater than the design value
(1) The actual flow is greater than the design value
(2) Blockage between boards
(3) the plate inlet is blocked