The coiled heat exchanger can be divided into two types


The immersed coil heat exchanger has a serpentine tube as a heat exchanger for the heat transfer element, and is one of the types of the partition wall heat exchanger. This is an ancient heat exchange device. The utility model has the advantages of simple structure, convenient manufacture, installation, cleaning and maintenance, low price, and is particularly suitable for cooling and condensation of high-pressure fluid, so it is still widely used in modern times. However, the coiled-tube heat exchanger is bulky and heavy; the metal heat loss per unit heat transfer area is low, and the heat transfer efficiency is low. According to the different cooling methods of the external fluid, the coiled heat exchanger is divided into immersed and sprayed.

Such heat exchangers are often wound with metal tubes or made into a variety of containers that are compatible with the container and immersed in the liquid in the container.

The jacketed heat exchanger is a kind of a wall-mounted heat exchanger, which is made by installing a jacket on the outer wall of the container, and has a simple structure; however, the heating surface is limited by the wall surface of the container, and the heat transfer coefficient is not high. In order to increase the heat transfer coefficient and make the liquid in the kettle heat evenly, a stirrer can be installed in the kettle. When the jacket is filled with cooling water or a phase change-free heating agent, a spiral partition or other may be arranged in the jacket. Increase the turbulence measures to increase the heat transfer coefficient on one side of the jacket. In order to supplement the shortage of the heat transfer surface, a coil can also be installed inside the kettle. Jacket heat exchangers are widely used for heating and cooling of reaction processes

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