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Plate heat exchanger repair manufacturers explain the reasons for the leakage of plate heat exchanger gaskets? _

by:DIGUANG     2021-04-13
Plate heat exchanger repair manufacturers explain the reasons for the leakage of plate heat exchanger gaskets?

2020-11-20 16:56
192 plate heat exchanger gasket leakage is often encountered, this phenomenon is relatively normal, do not panic when the plate heat exchanger gasket leakage occurs, the home page must understand the cause of the leakage, and then solve it Question, today the plate heat exchanger repair manufacturer will explain the reasons for the leakage of the plate heat exchanger gaskets? When the heat exchanger gasket material is in contact with fluid, when a certain fluid component penetrates into the rubber, the soluble substances in it can sometimes be extracted, resulting in the swelling of the gasket; the presence of halogen and the effect of ozone make the heat exchanger gasket The sheet becomes soft or causes stress corrosion cracking. At high temperatures, elastic materials will decompose and release chemical substances, and these substances themselves will corrode the plate material, such as FPM rubber will release oxygen. After disassembling the plate heat exchanger, it was found that the surface of the cold fluid end of the plate was bright, with a small amount of black fouling in some parts, the number of corrosion pits was small and did not penetrate, and there were black deposits in the corrosion pit, so it can be inferred to be a gasket Corrosion exists. Leakage occurs when the plate heat exchanger is used within the rated working pressure. In addition to the quality factors of the equipment in the manufacturing and assembly, it is mainly related to the abnormal impact load of water hammer and air hammer in the system. This is not easy during use. Observed phenomenon. The instantaneous pressure peak caused by the impact is often 1-3 times higher than the normal working pressure, which causes the gasket installed in the heat exchanger to shift and cause the seal to fail. Because the heat transfer element of this kind of equipment is made of stainless steel sheet (thickness) 0.5-1.0mm), its sealing rigidity is relatively poor and the sealing periphery is very long, so the ability to withstand impact pressure is much lower than that of shell-and-tube heat exchangers. This abnormal impact of the plate heat exchanger can be judged based on the equipment that provides the conveying medium for it. During the maintenance of the alkali pump that transports the lye to the plate heat exchanger, it is found that there are a small amount of honeycombs in the pump casing, indicating that the pump is in operation There is cavitation; at the same time, because of the leakage around the plate in the early stage, it can be inferred that the change of fluid pressure is also a possible factor of leakage. The plate heat exchanger repair manufacturer explained the reasons for the leakage of the plate heat exchanger gaskets? If you have any questions about plate heat exchanger maintenance and plate heat exchanger gaskets, the official website of Diguang Heat Transfer welcomes your consultation.
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