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GOLDENSAIL
19
2022
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07
What to pay attention to when choosing a plate heat exchanger
Author:
When choosing a plate heat exchanger, we should pay attention to which plates with high thermal conductivity are selected. Stainless steel has good thermal conductivity, thermal conductivity is about 14.4 W/(m.K), high strength, good stamping performance, not easy to be oxidized, and its price is lower than titanium alloy and copper alloy. It is widely used in heating engineering, but its chlorine resistance The ability of ion corrosion is poor.
The surface heat transfer coefficient of the high plate is due to the corrugation of the plate heat exchanger, which can cause the fluid to generate turbulent flow at a small flow rate (when the Reynolds number is 150), so a higher surface heat transfer coefficient can be obtained. The surface heat transfer coefficient It is related to the geometry of the corrugation of the plate and the flow state of the medium. The waveform of the plate includes herringbone, straight, spherical and so on.
The damaged plates and the leaking plates can be pulled out in pairs. If the number is not too large, the number of flow channels will not be reduced, and the production will not be greatly affected if it is continued to be used after assembly. This means that the equipment cannot be replaced on site, and the equipment cannot be shut down at the same time. If conditions permit, it will be replaced and maintained. The gasket of the plate heat exchanger has slipped out of the gasket groove. To deal with this dislocation phenomenon, the deformed plates and the gaskets that slip out of the gasket grooves should be replaced in time.
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