Refined oil quick switching device and switching method thereof

Abstract

The invention discloses a refined oil quick switching device and a switching method thereof. The device comprises a double-tank emptying structure, a heat exchanger and a decolorizing filter emptyingstructure. The double-tank emptying structure includes a first process tank and a second process tank in series connection, an oil outlet end of the first process tank and an oil outlet end of the second process tank are both connected to an oil inlet end of the heat exchanger through an oil outlet main pipe, and the oil outlet main pipe is equipped with a first oil discharge pump, the decolorizing filter emptying structure includes a decolorizing filter, a decolorized discharged oil temporary storage tank, a small filter and a bag type filter, an oil outlet end of the decolorizing filter is connected to one oil inlet end of the decolorized discharged oil temporary storage tank through a first oil discharge pipe, an oil outlet end of the bag type filter and one oil outlet end of the smallfilter are both connected to a deodorization section. According to the process adopted by the invention, oil stored in the system is completely emptied in the switching process, mixed oil does not exist, two mixed oil tanks in a tank area are reduced, and the oil degradation cost is reduced; the process switching time is shortened, the process automation degree is improved, and the labor intensityof the staff is reduced.

Description

technical field [0001] The invention relates to an oil refining process facility, in particular to a refined oil quick switching device and a switching method thereof. Background technique [0002] During the oil refining process, there will be 5-30 tons of mixed oil (mixed oil tanks will be added in the oil storage tank area, and oil products need to be downgraded) due to the inability to completely empty the oil in the process equipment and pipeline system Processing), and the switching time is long (1000 tons / day refinery switching time takes 10-12 hours, and the daily production capacity can only be 700-800 tons), and the labor intensity is high (3-4 people per shift). [0003] The conventional process is usually a single tank emptying structure (such as figure 2 As shown), you must wait for the process tank to be emptied before switching to the next batch of oil products. [0004] Conventional large-diameter pipelines usually use a nitrogen purge head to purge the pip...

AI Technical Summary

Problems solved by technology

[0004] Conventional large-diameter pipelines usually use nitrogen purge head to purge the pipeline from one end (lower position) to the other end (higher position). If the pipeline cannot be completely purged, mixed oil will be generated, which will affect the delivered oil.

[0005] Conventional decolorization filter will have a lot of system oil (generally about 3 tons) that cannot be completely drained, resulting in mixed oil and affecting oil products

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