What are the advantages and disadvantages of plate heaters?
Thread Content
Our factory has recently installed two plate heaters from the German company GEA. The results are good, but I don’t know how to clean and maintain them in the future? Let me ask you, comrades
Advantages of plate heat exchanger: 1. Large heat transfer coefficient, water-to-water heat exchanger can reach 1500---4700W/K 2. Small gap between plates, compact structure, metal consumption is more than half of that of shell and tube type. 3. It has a removable and washable structure, which is convenient for maintenance and cleaning. It can be directly dismantled for cleaning when work is stopped. The number of plates can be adjusted as needed to adjust the heat exchange area. shortcoming: The operating pressure and temperature are relatively low. If the pressure is too high, it will leak easily. The temperature is limited by the gasket material.
The operating pressure and temperature are relatively low. If the pressure is too high, it will leak easily. The temperature is limited by the gasket material. , has a removable and washable structure, which is convenient for maintenance and cleaning. It can be directly removed for cleaning when work is stopped. The number of plates can be adjusted as needed to adjust the heat exchange area.
The advantage is that the heat exchange area per unit metal consumption is large, the plate wall is thin, the flow channel in the plate is special and the flow rate is high, it is possible to obtain a higher heat transfer coefficient； The disadvantages are that the operating pressure is low, generally no more than 1.0Mpa, the plate replacement is afraid of scaling, especially solid objects are easy to block, cleaning is troublesome, and the service life of the sealing gasket is short.
With the current technology, it is definitely no problem to use a detachable plate with a working pressure of 1.6MPa. The one we produce is fine. The fully welded type can withstand a higher pressure and has no problem with a working pressure of 2.5MPa. The temperature-resistant detachable type generally depends on the rubber pad. Plate heat exchangers generally have higher requirements for working conditions. If the fluid temperature is unstable, hot and cold, it will cause great damage to the rubber pad. Also, be sure to clarify the medium composition in the fluid before choosing, because the plate is very thin. If the fluid contains particles, please choose a wide-gap plate heat exchanger. If it is used in air conditioning and heating, because the fluid is relatively clean, please choose a shallow-dense corrugated plate heat exchanger.
Later maintenance and spare parts costs are relatively high.