Lubricating oil furfural refinement device provided with multi-stage extract recovery system and method
A furfural refining and recovery method technology, applied in the direction of lubricating compositions, etc., can solve the problems of energy consumption reduction of the recovery system and increase of energy consumption of the extraction liquid evaporation tower, and achieve low equipment investment costs, low energy consumption costs, and simple and practical processes Effect
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[0029] Example 1:
[0030] In this example, a single-tower extraction process is used to refine lubricating oil furfural. The original process structure diagram is as follows figure 1 As shown, the process structure diagram after adding a two-stage recovery system is as follows figure 2 Shown. The lubricating oil material is a minus first-line spindle oil of a petrochemical enterprise. Its mass average boiling point is about 360°C, and its density at 20°C is 0.892g / mL. The analysis composition can be seen in Table 1. The flow rate of the lubricating oil to be processed is 30t / h, and the equipment operating parameters and product specifications are listed in Table 1. In this example, after the lubricating oil feed 2 is extracted by the extraction tower 3, the extracted liquid 4 at the bottom of the tower enters the primary cooler 6 and is cooled to 40°C, and then enters the primary liquid-liquid separator 7 for static phase separation. The upper liquid phase 8. After exiting the...
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[0035] Example 2:
[0036] In this example, a double-tower solvent split extraction process is used to refine furfural for lubricating oil. The original process structure diagram is as follows image 3 As shown, the process structure diagram after adding the recovery system is as follows Figure 4 Shown. The properties of the lubricating oil are the same as those in Example 1. The flow rate of the lubricating oil to be processed is 30t / h. The equipment operating parameters, product specifications and calculation results are listed in Table 3. In this process, the ratio of furfural flow rate entering the first stage extraction tower 3 to the second stage extraction tower 4 is 3:1. After the lubricating oil feed 2 is extracted by the extraction towers 3 and 4, the extracts 5 and 6 at the bottom of the two towers The mixing is that the extracted liquid 9 enters the primary cooler 10 and is cooled to 40°C, enters the primary liquid-liquid separator 11 for static phase separation, a...
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