Issues regarding coking and blockage of the packing in the washing section of the waste oil regeneration vacuum distillation unit, as well as prolonged startup times
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This device is a vacuum distillation unit for reprocessing used oil. The packing in the washing section often cokes and gets blocked, which requires the packing to be replaced after only about a month of operation. Does anyone have any good ideas to share?
Reply to 1# 494847993: To optimize your issue, it is necessary to list the process and the properties of the raw materials. Such as raw material impurities, impurity particle size, boiling range, and the content of gum and asphaltenes ； If the impact of impurities can be reduced to minimize tower coking through fine filtration, the filtration precision is determined based on the particle size distribution of the impurities, and appropriate filters are selected, etc. Only by identifying the true cause can analysis, adjustments, or modifications be made to address the problem
The raw oil for this device is used engine oil, which is a mixture of various types of waste lubricants. The impurities present in different used lubricating oils vary, including components such as metal shavings, sludge, crushed stones, and gums. Also, could you go into more detail about the fine filtration mentioned upstairs?
It can be filtered out – someone has already done that. The cost of filtering is higher than that of processing it directly; so, is it better to filter it or to process it straight away? It’s sufficient to stop production and clean things up whenever coking occurs, which also helps save costs.
This problem is very simple; our company can resolve it completely for you.
The cost of replacing the packing is low; it’s basically just a matter of replacing the packing, which is very convenient!
Make every effort to properly pre-treat the crude oil; before it enters the tower, it should be filtered, heated and allowed to settle, or flocculants should be added to facilitate sedimentation, so as to remove solid particles, sludge, and gums. The vacuum level can also be increased and the temperature reduced, or film evaporation or molecular distillation can be used to separate the base oil components from the waste oil. The key lies in the post-treatment of the base oil, which requires a high level of technical expertise.