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Simple understanding of five more common heat exchangers
Nov 12, 2018

In the specific types of heat exchangers, the following will focus on some common and common types, so that everyone has a certain understanding and understanding of their common and common types, rather than knowing nothing about this, and then, affecting the change The use of common types in heaters and various problems.


Jacket heat exchanger

This is a specific type of heat exchanger, which is made by installing a jacket on the outer wall of the heat exchanger. The structure is relatively simple, but the heating surface is subject to avoidance. Moreover, its heat transfer coefficient is not very high. When the cooling water or the phase change heating agent is introduced into the jacket, a spiral partition may be arranged in the jacket or other measures for increasing the turbulence may be adopted to increase the heat supply coefficient on one side of the jacket.


2. Immersed coil heat exchanger

In this type of heat exchanger, the metal tube is bent into various shapes that are suitable for the container and immersed in the liquid in the container. The advantage is that the structure is simple and can withstand high pressure, but the heat transfer coefficient outside the tube is not high, so the device of the stirrer can be installed to improve the heat transfer coefficient.


3. Spray heat exchanger

In this heat exchanger, the heat exchange tubes are fixed in rows on the steel frame, the hot fluid flows in the tubes, and the cooling water is evenly sprayed from the spray device above. Outside the tube, it is a layer of liquid film with a high degree of turbulence. In addition, this kind of heat exchanger is more in the circulation of air, because the evaporation of cooling water can take away a part of the heat to reduce the temperature of the cooling water, which is better than the immersion in heat transfer effect. Type coil heat exchanger.


4. Casing heat exchanger

The origin of the name is that the heat exchanger is made of concentric sleeves made of straight tubes of different diameters and connected by U-bends, so this specific name will be given. In this type of heat exchanger, the fluid can be used both inside and outside the annulus, so that a higher flow rate can be achieved, and a larger heat transfer coefficient can be obtained. Its advantages are simple structure, high pressure resistance and ease of use.


5. Wall-mounted heat exchanger

It has many applications in the industry. The main structure is a heat exchange plate and a strip for heat exchange between liquids. In order to increase the heat transfer coefficient of the fluid outside the pipe, a certain number of transverse baffle baffles can be installed in the casing, and the baffle baffles are in the form of a round shape and a disk shape, and the round shape is blocked. The board is used more.

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