What are the characteristics of spiral plate heat exchangers
Spiral plate heat exchangers have the following characteristics:
1. In terms of heat transfer performance
High heat transfer efficiency: The curved spiral channel and fixed distance column of the spiral plate heat exchanger are conducive to enhancing the turbulent state of the fluid. The fluid resistance in the channel is small, which can increase the design flow rate and thus help improve
Spiral plate heat exchangers have the following characteristics:
1. In terms of heat transfer performance
High heat transfer efficiency: The curved spiral channel and fixed distance column of the spiral plate heat exchanger are conducive to enhancing the turbulent state of the fluid. The fluid resistance in the channel is small, which can increase the design flow rate and thus help improve the heat transfer coefficient. In general, the heat transfer coefficient of water water heat exchange can reach 1.8-3.5 kilowatts per square meter per degree Celsius
Capable of achieving small temperature difference heat transfer: The fluid in adjacent channels flows in a pure countercurrent manner, resulting in a logarithmic average temperature difference. Therefore, even if the temperature difference between the two media is small, ideal heat transfer effects can be achieved, making it suitable for recovering low-temperature thermal energy
2. In terms of structural design
Compact structure: The heat transfer area per unit equipment volume is relatively large, up to 150 square meters. Under the same heat transfer area, the volume of the spiral baffle heat exchanger is one-third smaller than that of the traditional bow baffle heat exchanger, occupying a small area and saving space. It has obvious advantages in some limited space applications
Low temperature difference stress: Due to the elastic and free expansion characteristics of the spiral channel itself, the temperature difference stress is smaller during operation, making the equipment more stable and beneficial for extending its service life
Good sealing performance: For example, Type I non removable spiral plate heat exchangers use welded sealing on the end faces of their spiral channels, which have high sealing performance and are suitable for heat exchange of highly toxic, flammable, explosive or valuable fluids
3. In terms of fluid handling
Not easy to block: Spiral plate heat exchangers have self-cleaning function. When the fluid in a single channel passes through the impurity deposition area in the channel, the flow velocity will be relatively increased, which is easy to wash away impurities, especially suspended particles such as sediment and small shells, which are not easy to deposit in the spiral channel. However, if the design or operation is improper, blockage may also occur. In this case, using water, gas, or steam for flushing is more convenient and effective
Wide range of applicable fluids: Suitable for heat transfer in various forms of media such as steam, gas-liquid, liquid-liquid, etc. It can handle corrosive media with various viscosities, containing fibrous or granular substances, etc. It can adapt to the fluid heat transfer needs of different industries and working conditions
4. Maintenance and repair aspects
Difficulty in maintenance: Spiral plate heat exchangers are difficult to maintain, especially when there are problems with the internal plates, which are extremely difficult to repair. If the inner spiral plate ruptures, the entire equipment will be scrapped, which to some extent limits its application in situations where high equipment reliability is required and maintenance conditions are limited
Low maintenance cost: With a simple structure and no complex internal components, the maintenance workload is relatively small and the maintenance cost is low under normal operation
5. In terms of economic costs
Low cost: With the same heat exchange area requirement, spiral plate heat exchangers have a compact structure, small volume, relatively low raw material costs, and reduced equipment manufacturing costs, making them highly cost-effective.
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