With the economic development, different sorts and types of
heat exchangers have gotten rapid development. The heat exchangers with new structures, new supplies are constantly emerging. So that you can meet its development requirements, individuals have set up the standard and formed the series for certain varieties of heat exchangers. The improved heat exchangers should really meet the following basic requirements within the design or selection:
First, reasonably achieve the required working-process conditions;
Second, structure is safe and reliable;
Third, ease to manufacturing, installation, operation and maintenance;
Fourth, it ought to be economically rational.
Floating head heat exchanger's one end of tube is fixed with the shell, while the other end of the tube can be freely floating in the shell, shell and tube bundle are free for the expansion, so when the two media have larger temperature difference, shell and tube bundle won't produce the temperature difference stress. Floating side can be designed to be the removable structure, so that tube bundle can be easily inserted into or out of the shell. (it also can be designed to be non demolished) Such way of doing can bring more convenience for maintenance and cleaning. Nonetheless, this heat exchanger's structure is more complex and the cap of the floating end can not know the leakage situation when it's operating. Therefore, men and women should really pay special attention when installing the seal.
Floating head Heat Exchanger's part of the floating head structure can be designed in various forms in accordance with different requirements, what's more to men and women have to consider that the tube bundle can move freely within the equipment, folks must also take into account that floating head part's convenience of maintenance, installation and cleaning.
Circle hooks play a vital role to be certain that floating head's sealing and preventing leakage of media between the strings. With the growth and development of floating head heat exchanger's style, manufacturing technology, and the accumulation of long experience, the structure of circle hooks has gotten the continuous improvement and perfection.
Tubes are constituting the heat exchanger's heat transfer surface, while the tube's size and shape have the significant influence over heat transfer. When using small diameter tube, heat exchanger's heat transfer area would be larger, equipment is more compact, the unit metal consumption of heat transfer area is less, heat transfer coefficient is higher. But the manufacturing is troublesome, the tube is easy to accumulate scale, and it really is not easy to clean. Large-diameter tube is used for viscous or dirty fluids, small-diameter tube is used for cleaner fluid. Tube material selection should really be based on media pressure, temperature and corrosive feature.
