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Regeneration method for waste lubricant and apparatus

A waste lubricating oil and process technology, applied in the directions of lubricating compositions, chemical instruments and methods, semi-permeable membrane separation, etc., can solve the problems of high energy consumption of high-frequency vibration, difficult backwashing, high equipment cost, and achieve high service temperature. , easy operation, high energy conversion rate

Inactive Publication Date: 2007-11-14
李建新
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the technology of this project also has the following shortcomings: the cost of equipment is too high, the investment is huge, and the energy consumption of high-frequency vibration is high, which wastes resources, and the membrane element used is a flat membrane, which is not easy to backwash, and its practical application is greatly restricted.

Method used

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  • Regeneration method for waste lubricant and apparatus

Examples

Experimental program
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Effect test

Embodiment 1

[0056] Using the waste oil regeneration equipment and regeneration method described in the embodiment of the present invention, the waste oil (the same below) taken from the automobile repair factory is subjected to coarse filtration, impurity removal and dehydration, and the high temperature resistance of 85 °C with an average pore size of 0.1 μm is used. Polyvinylidene fluoride (PVDF) hollow fiber membrane module, under the conditions of the pre-treatment temperature of 65 ° C and 85 ° C and the operating pressure of 0.1 MPa, membrane separation and purification of the waste oil after dehydration and impurity removal are carried out. A clear, transparent brown regenerated oil is obtained.

[0057] Fig. 2 is a graph showing the change of membrane flux with operating time during the separation process. It can be seen from Figure 2 that the membrane flux is relatively stable throughout the operation. Simple viscosity measurement of recycled oil: the viscosity of waste oil at 4...

Embodiment 2

[0059] The regeneration method and equipment are the same as in Example 1, but the process conditions are: the pre- and post-treatment temperatures are 75°C and 80°C respectively, and the operating pressure is 0.1Mpa. Polysulfone hollow fiber membranes are used to carry out membrane separation and purification of waste oil after dehydration and impurity removal. A clear and transparent brown regenerated oil is obtained.

[0060] Fig. 3 is a graph showing the change of membrane flux with operating time during the separation process. It can be seen from Figure 3 that the membrane flux is relatively stable throughout the operation process.

Embodiment 3

[0062] Using the same PES membrane module and the same operation method as in Example 2, at the treatment temperature of 50°C and 60°C, the change of membrane flux with time was studied, and the results are shown in Figure 4.

[0063] It can be seen from Fig. 4 that when the treatment temperature is 60°C, the membrane flux of the whole purification process is increased by about 64% compared with that at 50°C. This shows that the treatment temperature has a direct impact on the waste oil regenerated by the hollow fiber membrane: higher temperature is beneficial to reduce the viscosity of the waste oil and increase the flow velocity of the fluid on the surface of the membrane, so that the waste oil can easily pass through the membrane pores, and the performance increase in membrane flux.

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Abstract

This invention relates to the regeneration method and equipment of one kind of waste lubricating oil, the regeneration method includes below crafts: impurity subsidence, pelletthickly filter, vacuum dehydration, its characteristic is that there has heat up craft after the impurity subsidence craft, there also has second time heats up craft and membrane separation craft after vacuum dehydration craft; The temperature of heat up craft is 65-75degree C; the temperature of second time heats up craft is 50-90degree C; The membrane separation craft uses the spatial textile fibermembrane, its average aperture is 0.01-0.5mum, it can bear 80-90degree C high temperature, and can resistant oil corrosion. This regenerative equipment characteristic is that it is suitable for this invention regeneration method, it at least includes a front heater, a set of vacuum dehydration installment, a intermediate storage tank, at least an heater and at least a center spatial textile fiber membrane module. The craft of using this invention method and the equipment is simple, its operation is easy, it is easy to control, high energy conversion rate and good separation effect, it also does not pollute the environment, low energy consumption, it is effective to recycle waste lubricating oil.

Description

technical field [0001] The invention relates to the application field of separation membranes, in particular to a method and equipment technology for regenerating waste lubricating oil through membrane separation technology, and the main classification number of the international patent is intended to be Int. Background technique [0002] During the use of lubricating oil, on the one hand, external pollutants, such as dust, metal filings, fibers, moisture, etc., will enter the oil and contaminate the lubricating oil; Oxidation leads to deterioration of performance and becomes waste (lubricating) oil, which cannot be used any longer. Waste lubricating oil is mainly manifested as solid sediment in the oil, darker color, increased acid value, and unpleasant smell. If the waste lubricating oil continues to be used, it will cause abrasion and wear of the equipment used. At the same time, the wear will produce new abrasive particles, which will further pollute the oil and cause a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M175/06B01D69/08
Inventor 李建新曹宇合赵怀田
Owner 李建新
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