Regarding the heat tracing for the spent alkali tank
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This post was last edited by sunjl1981 on 2013-1-6 at 23:30. I am working on a project that involves a 1000 m3 tank containing waste alkali. Given that the lowest temperature in the natural environment is -14.1 degrees, it is necessary to provide heating to maintain the temperature at around 10 degrees. So when considering the properties of alkalis, should a hot water heating coil be used for heating inside the tank? Steam tracing? Is electric heating better? I’m asking everyone to share their experiences! Thank you! # ， ， &
Generally, the alkali tank is insulated; on the basis of having an adequate insulation layer, it can be heated using steam tracing pipes.
Any of the three types of heat tracing will work; I think steam is the better option. Whether to use steam or hot water depends most importantly on the specific circumstances of your company; it’s about choosing what will result in lower costs in terms of equipment (pipes). Also, if there is extra hot water available, it can be used as well. The key point is: proper insulation of the piping related to the alkali tank is essential; otherwise crystallization can occur easily, and steam tracing must be used.
Electric heating is better, as it allows for temperature control; whereas with steam or hot water heating, it becomes problematic if the outlet water freezes
When steam is used, the temperature at the contact surface is relatively high, which requires higher standards for the material used. If your company has excess hot water, I think using it would be the best option. Electric heating elements are prone to damage and require frequent maintenance, which is quite troublesome.
If it’s a tank, using hot water for heating can ensure more even heating of the material. However, with tanks of such large size, maintenance becomes more complicated. Electric heating elements can generally only be installed on the walls of the tank, resulting in slower heating in the middle part of the material; but the advantage of electric heating is its simplicity of maintenance. Both approaches have their merits... Of course, if the requirements aren’t very high, installing a few heaters inside can also achieve the same insulating effect