The plate heat exchanger is a high-efficiency heat exchange equipment made up of a series of metal sheets with a certain corrugated shape. Once the detachable plate heat exchanger has excessive pressure drop, it will seriously affect the system's requirements for flow and temperature. Therefore, it must be handled in time to avoid affecting the use of the equipment. The pressure drop at the inlet and outlet of the medium exceeds the design requirements, which seriously affects the system's requirements for flow and temperature. If the pressure drop on the hot side of the heating system is too large, the primary side flow will be seriously insufficient (not enough heat source), which will cause the secondary side outlet temperature to fail to meet the requirements. What is the reason for the large pressure drop of the plate heat exchanger?
(1) The piping of the operating system of the heat exchanger is not normally purged, especially many dirt (such as welding slag) in the newly installed system piping enters the inside of the plate heat exchanger. Due to the narrow cross-sectional area of the flow channel of the plate heat exchanger, the sediment and suspended matter in the heat exchanger gather at the corner holes and the diversion area, resulting in a large reduction in the flow channel area and the main pressure loss here .
(2) After the plate heat exchanger has been running for a period of time, the pressure drop is too large due to fouling on the plate surface.
(3) The area of the plate heat exchanger is too small when it is selected and designed for the first time, which causes the flow velocity between the plates to be too high and the pressure drop to be too large.