How to prevent liquid caustic from crystallizing in winter
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As winter arrives and temperatures drop, liquid caustic begins to crystallize. Does anyone have any suggestions on ways to prevent this crystallization?
Heating is provided for the pipelines and containers used for transportation and storage
Equipment pipes and containers are insulated and heated, usually using electric heating or steam heating
There are only two options: 1. Reduce the concentration of liquid caustic; this is generally not advisable if the process operating conditions do not permit it； 2. Insulate the liquid alkali system; for example, enable circulation within the system, add insulation and steam heaters, and establish a interlock between the temperature of the liquid alkali and the steam control valve ； 3. If you want to be lazy. Depending on the actual conditions, introduce steam into the alkaline solution; install a stop valve and keep it open throughout the day – just be mindful of the relevant issues
Electric heating is generally used, and the temperature needs to be controlled to prevent alkali embrittlement； The temperature of steam or other heating media is relatively difficult to control
When using heat tracing, be careful to prevent localized overheating in order to avoid alkali embrittlement!!!
On one hand, the concentration of the alkaline solution can be controlled; on the other hand, electric or steam heating can be used. Excessively high temperatures increase corrosion, so these details need to be taken into account.
Insulation and heating for equipment pipelines are generally achieved using electric heating
Insulation, heat tracing, and installation of heating devices indoors