Methods for descaling the surface of heat exchange tubes

Date:2018-08-11

In the most common type of wall-mounted heat exchangers, there are mainly two modes of heat transfer, conduction and convection. The hot fluid first transfers heat to one side of the pipe wall by means of convection heat, and then conducts heat from one side of the pipe wall to the other side, and finally the other side of the pipe wall is convectively heated. The heat is transferred to the cold fluid, which completes the heat transfer process of the heat exchanger.

The greater the flow rate of the medium in the heat exchanger, the greater the heat transfer coefficient. Therefore, increasing the flow rate of the medium in the heat exchanger can greatly improve the heat exchange effect, but the negative effect of increasing the flow rate is to increase the pressure drop through the heat exchanger and increase the energy consumption of the pump, so it is necessary to have a certain appropriate range.

What is the effect of the surface structure of the heat exchange tube on the heat transfer effect? The specially designed heat transfer tube surface structure, such as finned tube, nail head tube, threaded tube, etc., on the one hand increases the heat transfer area, on the other hand, the special surface spoiler greatly increases the turbulence degree of the external fluid. Both of them can improve the overall heat transfer effect of the heat exchanger, so these surface structures are superior to the performance of the light pipe surface.

Common methods for descaling the surface of heat exchange tubes are:

1.Mechanical descaling: steel brazing manual descaling, pressure water cleaning

2.Chemical descaling

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