Process for refining base oil by using regenerated waste oil from inclined wall wiped film vacuum distillation

A technology of waste engine oil and membrane distillation, applied in the direction of pervaporation, lubricating composition, etc., can solve the problems of increasing residual oil recovery and oil content, increase product yield, easy and safe manual operation, and simple process flow reasonable effect

Inactive Publication Date: 2010-01-27
王延海
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Problems solved by technology

The existing wiping film distillation technology adopts a single gasification distillation temperature, and the barrel and evaporating liquid surface of the wiping film evaporator are vertical. W

Method used

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  • Process for refining base oil by using regenerated waste oil from inclined wall wiped film vacuum distillation

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Embodiment Construction

[0013] 1. The high-temperature flocculation neutralization head in the A section, the raw material oil (waste engine oil) is pumped into the high-level oil tank, and the flow rate (500kg / h) from the high-level oil tank is controlled by the flow meter into the A1 heat exchanger. The reflux oil (200-204°C) and the reflux flow (220kg / h) are convectively heat-exchanged, and the second-line reflux oil is controlled at (50-60°C) by heat exchange and cooling. At this time, the temperature of the raw material oil (waste engine oil) can be heated up to (35-55°C) by heat exchange, enter the A2 heat exchanger and exchange heat with the return flow (450kg / h) of the third-line return hot oil (260-286°C), and the third-line reduction The reflux oil is cooled by heat exchange, and the oil temperature is controlled at (200-206°C), and pumped into the rectification tower of the C section minus the third-line reflux section. At this time, the raw oil (waste engine oil) can heat up (70-95°C) and...

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Abstract

The invention relates to a process for refining base oil by using regenerated waste oil from inclined wall wiped film vacuum distillation, which belongs to the field of waste oil regeneration. The key technical point of the process is to emphasize the solution of the problem that the vacuum wiped film distillation technology in the prior art has drawbacks of large residual oil discharge amount and low product yield due to the fact that the distilled liquid film of a wiped film evaporator is easy to be scraped by a wiped film scraper blade to fall onto the bottom of the evaporator to be discharged. For solving the problem, the process adopts a technical scheme of high-temperature flocculation neutralization topping, inclined wall vacuum wiped film distillation, vacuum distillation tower rectification separation and vacuum high-temperature clay absorption refining. The technical key points of the process also include: the vacuum inclined wall wiped film vacuum distillation technology and a complete cone inclined wall wiped film evaporator are adopted; and technical processes that the cone barrel and heating evaporation liquid surface incline 2 to 30 degrees outwards, that two processes of distillation and gasification at different temperatures and the like are adopted; the discharge amount of residual oil is reduced; the product yield is increased; and the product quality is improved.

Description

Technical field [0001] Petrochemical industry, especially in the field of waste engine oil regeneration and refining base oil Background technique [0002] At present, domestic waste engine oil regeneration and refining base oil technologies are mostly head distillation-sulfuric acid refining-lime milk-clay adsorption refining process or head distillation-acid-clay process, etc. [0003] Foreign waste engine oil recycling and refining technology is relatively advanced, and thin-film distillation-clay technology or thin-film distillation-hydrofining technology is mostly used. According to the author Dai Junliang, Waste Lubricating Oil Regeneration (Third Edition), published by Sinopec Press, printed for the second time in August 2000, Chapter 15, Section 2, Wiping Film Distillation-Clay Process, the process product Yield is very low, and base oil fraction (65%), light oil fraction (7%) comprehensive yield (72%) residue oil discharge is but up to (28%) and contains lubricatin...

Claims

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Application Information

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IPC IPC(8): C10M175/00B01D61/36
Inventor 王延海
Owner 王延海
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