Spiral plate heat exchanger belongs to a type of plate heat exchanger. It is rolled from two parallel metal plates and forms two concentric spiral channels in its interior. A partition plate is arranged in the center of the heat exchanger to separate the spiral channels, and a fixed distance column is welded between the two plates to maintain the channel distance.
The advantages of spiral plate heat exchangers are:High heat transfer coefficient;Not easy to scale and block;Can use lower temperature heat sources;Compact structure.
The disadvantages of spiral plate heat exchangers are:The operating pressure and temperature should not be too high;Not easy to overhaul.
The heat pipe is formed by filling a certain amount of a certain working liquid in a sealed metal pipe for removing non-condensable gas. The working liquid absorbs heat at the hot end and boils and vaporizes. The generated steam flows to the cold end to condense and release latent heat. The condensate returns to the hot end to boil and vaporize again. Repeating the cycle like this, the heat is continuously transferred from the hot end to the cold end.
The advantages of heat pipe heat exchangers are:Simple structure, long service life and reliable work;Has extremely high thermal conductivity and good isothermal properties;The heat transfer area on both sides of the cold and heat can be changed arbitrarily, the heat can be transferred over a long distance, and the temperature can be controlled.
The disadvantages are:Poor resistance to oxidation and high temperature.
Notes on the use of heat exchangers:
Keep the pipe network clean. Whether before or after the work is completed, the pipe network must be cleaned to avoid blockage of the heat exchanger. In addition, we must pay attention to cleaning the decontamination and filter, so that the entire heat exchange work can be successfully completed.
Strictly soften the water. Before the heating medium treatment, check the water quality problems in the system and the softening tank, and confirm that the water quality can be injected.
Test the new system. For the new system, it cannot be used interchangeably with the heat exchanger immediately, but the new system must be operated within a specified period of time. After the operation inspection is completed, the heat exchanger can be incorporated into the system. The purpose of this is to avoid impurities in the pipe network from damaging the internal equipment of the heat exchanger.