The characteristics of this type of heat exchanger are that the tube bundle can be freely expanded and contracted, and no thermal stress will be generated due to the temperature difference between the shell and the tube. The thermal compensation performance is good; Strong pressure-bearing capacity; The tube bundle can be pulled out of the casing for easy maintenance and cleaning, which has a simple structure and low cost. However, cleaning in the tube is inconvenient, the tube in the middle part of the tube bundle is difficult to replace, and the bending radius of the innermost tube cannot be too small. Shell-side fluid is susceptible to short-circuit and affects shell-side heat transfer. In addition, in order to compensate for the thinning of the pipe wall after the bend, a thicker pipe is needed for the straight pipe part. This affects its use occasions, and should only be used in cases where the temperature difference between the shell and the wall is large, or the medium on the shell side is prone to fouling, while the medium on the pipe side is clean and difficult to foul, high temperature, high pressure, and corrosive conditions.
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