The coil wound tube heat exchanger is made of one or more groups of spirally wound tubes placed in a shell. Within this type of heat exchanger, several layers of tubes are helically wound around a large centre tube, known as a mandrel. This tube bundle can be designed in such a way that it can contain more than one tube fraction to accommodate different process media. Both ends of the tubes are welded to tube sheets or ring pipes.
The precisely designed coil wound tube bundle creates a strong turbulent effect when the medium flows through the tube side and shell side, the heat exchange capacity per unit area is greatly improved compared with the traditional in-line tube heat exchanger. The heat exchange efficiency is more higher and the coefficient is up to 14,000W(m²·℃).
The particular coil wound tube bundle has elastic characteristics, which completely eliminates the pull-off stress between the heat exchange tube and the tube sheet due to temperature difference or vibration, thereby greatly extending the service life.
The heat exchange area is increased to the Max. within the unit volume. Under the same working conditions, the volume is only 1/5 of the traditional heat exchanger, saving space. It can be directly connected to the pipeline, eliminating the need for installation foundation.
The designed flow rate is high (5.5m/s), lower scale deposition rate and lower scaling tendency
The tube bundle adopts optimized design, such as small gap, which effectively eliminates the resonance problem, and runs stably and reliably with low noise.
According to the working conditions and geographical environment, a variety of materials are available for design selection, such as SS304/316, duplex steel 2205, titanium steel, Hastelloy, etc., to meet the requirements of long-life operation.
