In what situations cannot plate heat exchangers be used? Can a plate heat exchanger gasket withstand temperatures over 300 degrees?
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In what situations cannot plate heat exchangers be used? Can a plate heat exchanger gasket withstand temperatures over 300 degrees?
Plate heat exchangers generally cannot be used with corrosive or scaling-prone media, such as those containing acids, sulfuric acids, and chlorine-containing substances. Plate heat exchanger gaskets that can withstand temperatures over 300 degrees are feasible, but the surrounding environment must also have an appropriate temperature; otherwise, issues such as reduced heat exchange efficiency may occur. -
Plate heat exchangers come in types with welding and those secured with stacked bolts. This temperature requirement seems to result in a large difference compared to normal temperatures, leading to structural changes caused by stress variations. Although plate heat exchangers have high efficiency, they may not be suitable for fluids with excessively high pressure or temperature. Coil-type heat exchange is commonly used for reference.
In what situations is plate heat exchanger use not appropriate? Help summarize it
Excessively high temperatures, high pressures, large temperature differences for heat exchange, and excessive pressure are all unsuitable; due to its special structure, it is not suitable either. For reference.
There are also material properties; those that are not suitable for ordinary gaskets require welding.
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Today, plate heat exchangers come in various types, such as split-type, fully welded type, and shell-and-plate type. The plates can be made of stainless steel, titanium alloy, Hastelloy, etc. There are also products designed for use in environments with high corrosion, high temperature, and high pressure. It is necessary to make a proper selection based on the medium, physical properties, pressure, temperature, etc.; for specific advice, it is advisable to consult plate heat exchanger manufacturers.
That’s correct; the gas-to-gas heat exchanger used for exhaust gases is made of stainless steel, which is resistant to high temperatures and corrosion
Plate heat exchangers are divided into detachable plate heat exchangers (including gasketed and semi-welded types) and welded plate heat exchangers; the welded type should be able to withstand high temperatures of over 300 degrees. In gasket-type plate heat exchangers, if flexible graphite gaskets are used, they can withstand temperatures of up to 650 degrees; rubber gaskets cannot do this.