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A continuous distillation process for regeneration of waste lubricating oil

A technology of waste lubricating oil and process, applied in the direction of lubricating composition, etc., can solve the problems of mixing, complicated process, etc., and achieve good technical and economic effects

Inactive Publication Date: 2016-06-22
四川省中明环境治理有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] Since the above-mentioned patents still have problems such as complex process, doping of other metals or inorganic ions, etc., and fail to completely solve the problems of clogging and corrosion, in view of the shortcomings of the existing process technology

Method used

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  • A continuous distillation process for regeneration of waste lubricating oil
  • A continuous distillation process for regeneration of waste lubricating oil
  • A continuous distillation process for regeneration of waste lubricating oil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: as figure 2 As shown, lubricating oil 1 coming from the tank area with a normal temperature of about 40°C and a flow rate of 12875kg / h conducts heat exchange with the fraction extracted from the side line of the minus line first in the raw oil-light base oil heat exchanger e, and then exchanges heat with the side line of the minus line The raw material oil-heavy base oil heat exchanger f performs heat exchange, and finally performs heat exchange with the raw material oil-vacuum residue heat exchanger g at the bottom of the vacuum tower to obtain stream 2, whose temperature is 240°C.

[0035] Stream 2 enters the feed heating furnace a and is heated to obtain stream 3 at 380°C. Stream 3 enters vis-reducing reaction tower b. The operating conditions are: temperature 380°C, residence time 1h.

[0036] The waste oil 4 after visbreaking heat treatment has a temperature of 377° C., and it directly enters the flash tower c for flash evaporation at an operating pr...

Embodiment 2

[0038] Example 2: The waste lubricating oil 1 from the tank farm at a normal temperature of about 40°C is first exchanged with the fraction extracted from the side line of the first line in the raw material oil-light base oil heat exchanger e, and then exchanged with the raw material oil of the side line of the second line reduction- The heavy base oil heat exchanger f performs heat exchange, and finally conducts heat exchange with the raw material oil at the bottom of the vacuum tower—vacuum residue heat exchanger g to obtain stream 2, whose temperature is 280°C.

[0039] Stream 2 enters the feed heating furnace a and is heated to obtain stream 3 at 320°C. Stream 3 enters vis-reducing reaction tower b. The operating conditions are: temperature 320°C, residence time 1.5h.

[0040] The waste oil 4 after visbreaking heat treatment has a temperature of 318° C., and it directly enters the flash tower c for flash evaporation at an operating pressure of 1 MPa. The top of the tower i...

Embodiment 3

[0042] Example 3: The normal temperature waste lubricating oil 1 from the tank area is first exchanged with the fraction extracted from the side line of the first line reduction in the raw material oil-light base oil heat exchanger e, and then exchanged with the raw material oil of the second line side line reduction-heavy base oil The heat exchanger f performs heat exchange, and finally exchanges heat with the raw material oil at the bottom of the vacuum tower—the vacuum residue heat exchanger g to obtain stream 2, whose temperature is 260°C.

[0043] Stream 2 enters the feed heating furnace a to be heated to obtain stream 3 at 350°C, and stream 3 enters vis-reducing reaction tower b. The operating conditions are: temperature 350°C, residence time 1h.

[0044] The waste oil 4 after visbreaking heat treatment has a temperature of 346°C, and it directly enters the flash tower c, where it is flashed at an operating pressure of 1 MPa. The top of the tower is condensed and separat...

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Abstract

The invention discloses a continuous distillation process for regeneration of waste lubricating oil. The process includes a heat exchange process between waste oil and distilled cut fractions, a visbreaking heat treatment unit and a flash evaporation-vacuum distillation unit. The detergency and dispersion additives in waste oil can be effectively removed through visbreaking heat treatment, so that suspended impurities such as metals in waste oil can be deposited more easily, and at the same time, some metal salt additives and corrosive organic acids can be decomposed or deteriorated. Light components and base oil fractions can be effectively extracted by using flash-vacuum distillation. In addition, the optimized heat exchange system effectively reduces the energy consumption of continuous distillation, the overall extraction rate of waste oil through the process of the invention is higher than 85%, the technical economy is good, the impurity content is low (especially low metal content), Distilled products can be directly used as high-quality raw materials for subsequent hydrofining.

Description

technical field [0001] The invention belongs to the technical fields of refining and chemical engineering, environmental protection and energy, and relates to a pollution-free recycling method of waste lubricating oil and an oil refining process for producing lubricating oil base oil from waste oil as a refining raw material. Background technique [0002] In waste oil regeneration, distillation, as an important unit process, can be used not only for dehydration in waste oil purification, but also for light deoiling in re-refining, and to divide waste lubricating oil into several base oil fractions, and also Asphaltene, colloids, additives, metal salts, etc. in waste oil can be left in the distillation residue and separated from the base oil. [0003] There are a large number of solid particles in lubricating oil, such as worn metal particles, carbon particles generated by combustion, mechanical impurities, cleaning and dispersing agents dispersed in waste oil, functional add...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C10M175/00
Inventor 柳云骐韩海陈小军王玉龙马海灵何中明
Owner 四川省中明环境治理有限公司
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