Fluidity of residue and wax oil
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There is residue in the residue line of the unit; it hasn’t been in use for several days, and the residue has solidified inside the pipeline. What is the approximate temperature at which the residue will start to flow again? Thank you
The fluidity of residue is greatly affected by temperature, and it usually needs to be within a certain temperature range in order to remain in a fluid state. Different types of residue have varying degrees of fluidity, but generally, the flow point temperature of residue ranges from 70°C to 150°C. When the residue in the pipeline solidifies, it can be turned back into a liquid state by heating. Under normal circumstances, the temperature must be raised to a level above the flow point temperature of the residue in order to restore it to a liquid state. Therefore, the specific temperature increase required depends on the type of residue and its degree of solidification; it is recommended that you consult the equipment manufacturer or relevant professionals for a more accurate answer. -
The pump can be started after turning on the steam trace for half an hour. At the initial stage, the flow rate in the pipeline is not very good, so it is necessary to operate the pump at a low flow rate; as the temperature rises later on, the flow rate can be increased gradually； Generally, the freezing points of vacuum wax oil and vacuum residue range from 37 to 90 degrees.
It is necessary to determine whether it is atmospheric or vacuum residue, as well as the light fraction recovery rate; by examining the crude oil evaluation, one can determine its freezing point.