CN216337481U

CN216337481U - Waste lubricating oil regeneration device

Info

Publication number: CN216337481U
Application number: CN202121470491.8U
Authority: CN
Inventors: 陈献富; 黄新; 柯威
Original assignee: Jiangsu Zhongzhou Testing Technology Co ltd
Current assignee: Jiangsu Zhongzhou Testing Technology Co ltd
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-04-19
Anticipated expiration: 2031-06-30

Abstract

The utility model relates to a waste lubricating oil regeneration device, and belongs to the technical field of oil recovery. The method comprises the following steps: the flocculation tank is used for carrying out flocculation treatment on the waste lubricating oil; the coarse filter is connected with the flocculation tank and is used for performing coarse filtration treatment on the flocculated lubricating oil; the evaporator is connected to the permeation side of the coarse filter and used for evaporating the filtered oil obtained in the coarse filter to obtain a light component and a heavy component; the first hydrophobic ceramic membrane component is connected to the top of the evaporator and is used for filtering the obtained light-component lubricating oil to remove water; and the second hydrophobic ceramic membrane component is connected to the bottom of the evaporator and is used for filtering the obtained heavy component lubricating oil to remove water and mechanical impurities. The waste lubricating oil treatment device of the patent obtains light and heavy fraction lubricating oil in the waste lubricating oil treatment device by distillation; in addition, water and residual mechanical impurities in the obtained light and heavy fraction lubricating oil can be removed simultaneously through the hydrophobic ceramic membrane.

Description

Waste lubricating oil regeneration device

Technical Field

The utility model relates to a waste lubricating oil regeneration device, and belongs to the technical field of oil recovery.

Background

The lubricating oil is called blood for maintaining normal operation of machinery, and the lubricating oil gradually degrades due to the invasion of external pollutants and self-oxidation deterioration in the using process and must be replaced in time, so that a large amount of waste lubricating oil is generated. The analysis data of the waste lubricating oil shows that the impurity component only accounts for 1-25%, and the main body is lubricating oil base oil. The regeneration of the waste lubricating oil is to remove pollutants and deteriorated components in the waste oil by a physical or chemical method so as to enable the waste lubricating oil to reach the quality index of the lubricating oil base oil. In view of gradual depletion of petroleum resources and environmental pollution caused by the waste lubricating oil, the regeneration of the waste lubricating oil undoubtedly has good social and economic benefits.

For the regeneration process of lubricating oil, the current regeneration methods can be mainly divided into three major types, namely an acid process, a hydrogenation process and an acid-free process. The acid process is gradually eliminated because of the generation of more acid residues, difficult treatment and easy environmental pollution. The hydrogenation process has the advantages of large treatment capacity, good regeneration effect and environmental protection, but the hydrogenation equipment is expensive, the technology is complex, the treatment cost is higher, the method is only suitable for a large-scale continuous regeneration process, and the catalyst is easy to inactivate and needs to be regenerated. The acid-free process comprises a solvent extraction process, a clay high-temperature contact acid-free process, a supercritical fluid extraction fractionation process and other production processes, acid sludge is not generated, and the environmental pollution is light.

However, the above-mentioned treatment method has problems of low purification efficiency, low continuity of equipment operation, etc. in the treatment process of the lubricating oil with high viscosity, resulting in a problem of more process mismatch in the treatment of the lubricating oil with high viscosity.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the problems of low matching performance and low treatment efficiency of the conventional treatment process in the high-viscosity lubricating oil treatment process in the prior art are solved. The utility model provides a waste lubricating oil regeneration device, which integrates units such as natural sedimentation, flocculation, vacuum dehydration, fine filtration and the like, and effectively achieves the aim of treating high-viscosity lubricating oil.

The technical scheme is as follows:

a used lubricating oil regeneration device comprising:

the flocculation tank is used for carrying out flocculation treatment on the waste lubricating oil;

the coarse filter is connected with the flocculation tank and is used for performing coarse filtration treatment on the flocculated lubricating oil;

the evaporator is connected to the permeation side of the coarse filter and used for evaporating the filtered oil obtained in the coarse filter to obtain a light component and a heavy component;

the first hydrophobic ceramic membrane component is connected to the top of the evaporator and is used for filtering the obtained light-component lubricating oil to remove water;

and the second hydrophobic ceramic membrane component is connected to the bottom of the evaporator and is used for filtering the obtained heavy component lubricating oil to remove water and mechanical impurities.

Further comprising: and the light component finished product tank is connected to the permeation side of the first hydrophobic ceramic membrane component and is used for storing the obtained light component lubricating oil finished product filtrate.

Further comprising: and the heavy component finished product tank is connected to the permeation side of the second hydrophobic ceramic membrane component and is used for storing the obtained heavy component lubricating oil finished product filtrate.

The coarse filter is a filtering device which adopts fibrous asbestos or dense metal wire mesh as a filtering medium.

Further comprising: the prefilter is connected with the flocculation tank and is used for prefiltering the waste lubricating oil entering the flocculation tank to remove mechanical impurities.

The pre-filter is a medium filter containing a metal screen.

Further comprising: and the condenser is connected to the top of the evaporator and is used for condensing the light components obtained from the top of the evaporator to obtain liquid lubricating oil.

The aperture range of the first hydrophobic ceramic membrane component and/or the second hydrophobic ceramic membrane component is 20-200nm, and the water drop contact angle of the membrane surface is 120-160 degrees.

The second hydrophobic ceramic membrane component is internally provided with a tubular membrane element, the front end and the rear end of the second hydrophobic ceramic membrane component are respectively provided with a front seal head and a rear seal head, the front seal head is provided with a feed inlet, the rear seal head is provided with a discharge outlet, the outside of the tubular membrane element is sleeved in a flower disc to be fixed in the second hydrophobic ceramic membrane component, the end head of the tubular membrane element is also provided with a funnel-shaped material pipe, the funnel-shaped material pipe enables the front seal head and the tubular membrane element to be communicated, and one end with larger section radius of the funnel-shaped material pipe faces the front seal head.

Further comprising: and the flocculating agent adding tank is connected to the flocculation tank and is used for adding the flocculating agent into the flocculation tank.

Advantageous effects

The waste lubricating oil treatment device is suitable for regenerating lubricating oil with medium and high viscosity, mechanical impurities in the lubricating oil can be removed in a pre-flocculation treatment mode, and light and heavy fraction lubricating oil in the lubricating oil can be obtained in a distillation mode; in addition, water and residual mechanical impurities in the obtained light and heavy fraction lubricating oil can be removed simultaneously through a hydrophobic ceramic membrane; and when the heavy component lubricating oil is subjected to ceramic membrane filtration, the heavy component lubricating oil is treated through a drainage tube at a pipeline interface, so that high pressure drop loss of the high-viscosity lubricating oil in a pipeline is avoided.

Drawings

FIG. 1 is a diagram of the apparatus of the present invention; FIG. 2 is a structure of a second hydrophobic ceramic membrane module;

wherein, 1, a prefilter; 2. a flocculation tank; 3. a flocculant adding tank; 4. a coarse filter; 5. an evaporator; 6. a condenser; 7. A light component tank; 8. a first hydrophobic ceramic membrane module; 9. a light component finished product tank; 10. a heavies tank; 11. a second hydrophobic ceramic membrane module; 12. a heavy component finished product tank; 13. a tubular membrane element; 14. a flower disc; 15. a funnel-shaped material pipe; 16. a front end enclosure; 17. Sealing the end; 18. a feed inlet; 19. a discharge port; 20. a permeate side outlet.

Detailed Description

The used lubricating oil to be treated in the present invention is mainly a lubricating oil having a relatively high viscosity, and typically comprises the following components:

the device of this patent is shown as figure 1, mainly includes:

the main function of the pre-filter 1 is to remove larger mechanical impurities, such as grinding chips, particles, etc., from the lubricating oil. The pre-filter 1 here may be a media filter using some metal mesh.

And a flocculation tank 2 connected with the pre-filter 1 for flocculating the waste oil obtained in the pre-filter 1 to coagulate some mechanical impurities therein, wherein the used flocculating agent is mainly aqueous solution of some inorganic salts, such as 10-20 wt% aqueous solution of sodium carbonate. A corresponding flocculating agent adding tank 3 is also arranged on the flocculation tank 2.

After the flocculation tank 2, a coarse filter 4 is arranged for filtering larger particles of impurities generated by flocculation, wherein the filter can adopt fibrous asbestos or dense metal wire mesh as filtering equipment of a filtering medium, and the coarse filter 4 is connected with a liquid outlet of the flocculation tank 2.

The evaporator 5 is connected with the filtrate side of the coarse filter 4, and fractionates the lubricating oil in an evaporation mode to obtain fractions with different grades, the bottom of the evaporator is a light component outlet and is used for discharging the light component after distillation as a gas phase, the top of the evaporator 5 is connected with the condenser 6, and the condenser 6 condenses the light component of the gas phase to obtain a liquid light component; in addition, the water in the lubricating oil is discharged as light components, when the lubricating oil is filtered by a subsequent first hydrophobic ceramic membrane component, the water in the light components oil can be filtered out because the oil phase is used as a continuous phase, the aperture range of the first hydrophobic ceramic membrane component 8 used herein can be 20-200nm, the membrane surface is subjected to hydrophobic treatment, and the water drop contact angle ranges from 120-. The filtrate side of the first hydrophobic ceramic membrane module 8 is connected with a light component finished product tank 9,

the heavy component lubricating oil obtained from the bottom of the evaporator 5 has increased viscosity, and is stored in a heavy component tank 10 connected with the evaporator 5, and then is subjected to precision filtration by a second hydrophobic ceramic membrane assembly 11, so that some fine mechanical impurities and water in the heavy component lubricating oil can be removed, wherein the water drop contact angle of the second hydrophobic ceramic membrane assembly 11 is 120-160 °. The resulting refined heavy lubricant is sent to the heavy ends product tank 12. In addition, when heavy component lubricating oil is subjected to ceramic membrane filtration, the viscosity of oil products is high, so that the inlet end and the outlet end of the tubular ceramic membrane are easy to have large pressure drop, and the filtration energy consumption is high and the flux is low. The structure of the second hydrophobic ceramic membrane module 11 adopted in the patent is shown in fig. 2, a tubular membrane element 13 is installed in the second hydrophobic ceramic membrane module 11, a front seal head 16 and a rear seal head 17 are respectively arranged at the front end and the rear end of the second hydrophobic ceramic membrane module 11, a feed inlet 18 is arranged on the front seal head 16, a discharge outlet 19 is arranged on the rear seal head 17, the outside of the tubular membrane element 13 is sleeved in a flower disc 14, so that the tubular membrane element is fixed in the second hydrophobic ceramic membrane module 11, a funnel-shaped material pipe 15 is further arranged at the end of the tubular membrane element 13, the funnel-shaped material pipe 15 enables the front seal head 16 to be communicated with the tubular membrane element 13, and one end of the funnel-shaped material pipe 15 with a larger section radius faces the front seal head 16. When the structure is adopted, the feed liquid does not directly impact the section of the flower disc 14 when entering the filtering process of the tubular membrane element 13, but enters the tubular membrane element 13 through the funnel-shaped pipeline, so that the pressure loss on the end surface caused by impact is avoided, the motion energy consumption of high-viscosity lubricating oil is reduced, and the feed liquid can be better utilized in the filtering process.

Example 1

Filtering the waste lubricating oil by using a metal screen to remove larger particles, adding about 12 wt% of sodium carbonate solution, wherein the volume ratio of the addition amount of the flocculating agent to the lubricating oil is 20: 1, stirring after adding, standing, and filtering clear liquid by an asbestos cloth to remove flocculation residues; and then carrying out distillation treatment to obtain light-component lubricating oil with the fraction at 275-285 ℃, condensing, and filtering by adopting a surface hydrophobic modified ceramic membrane with the aperture of 50nm (the surface water drop contact angle is 165 ℃) to obtain light-component lubricating oil on a permeation side, filtering heavy components by adopting a ceramic membrane with the aperture of 50nm (the surface water drop contact angle is 155 ℃), and obtaining heavy-component lubricating oil on the permeation side.

Example 2

Filtering the waste lubricating oil by using a metal screen to remove larger particles, adding about 15 wt% of sodium carbonate solution, wherein the volume ratio of the addition amount of the flocculating agent to the lubricating oil is 25: 1, stirring after adding, standing, and filtering clear liquid by an asbestos cloth to remove flocculation residues; and then carrying out distillation treatment to obtain light-component lubricating oil with the fraction at 280-295 ℃, condensing, filtering by adopting a surface hydrophobic modified ceramic membrane with the aperture of 20nm (the surface water drop contact angle is 155 ℃), obtaining the light-component lubricating oil at the permeation side, filtering the heavy component by adopting the ceramic membrane with the aperture of 20nm (the surface water drop contact angle is 150 ℃), and obtaining the heavy-component lubricating oil at the permeation side.

Example 3

The treatment and lubricating oil parameters in the above examples were as follows:

it can be seen that the method of the patent is suitable for the regeneration treatment of the lubricating oil with high viscosity, and can obviously remove mechanical impurities and water in the lubricating oil; and can obtain lubricating oil products of light and heavy grades.

Claims

1. A used lubricating oil regenerating device, characterized by comprising:

the flocculation tank (2) is used for carrying out flocculation treatment on the waste lubricating oil;

the coarse filter (4) is connected with the flocculation tank (2) and is used for performing coarse filtration treatment on the flocculated lubricating oil;

the evaporator (5) is connected to the permeation side of the coarse filter (4) and is used for evaporating the filtered oil obtained in the coarse filter (4) to obtain a light component and a heavy component;

the first hydrophobic ceramic membrane component (8) is connected to the top of the evaporator (5) and is used for filtering the obtained light-component lubricating oil to remove water;

and the second hydrophobic ceramic membrane component (11) is connected to the bottom of the evaporator (5) and is used for filtering the obtained heavy component lubricating oil to remove water and mechanical impurities.

2. The used lubricating oil regeneration device of claim 1, further comprising: and the light component finished product tank (9) is connected to the permeation side of the first hydrophobic ceramic membrane component (8) and is used for storing the obtained light component lubricating oil finished product filtrate.

3. The used lubricating oil regeneration device of claim 1, further comprising: and the heavy component finished product tank (12) is connected to the permeation side of the second hydrophobic ceramic membrane component (11) and is used for storing the obtained heavy component lubricating oil finished product filtrate.

4. The used lubricating oil regeneration device according to claim 1, characterized in that the coarse filter (4) is a filtering apparatus using fibrous asbestos or dense wire mesh as a filtering medium.

5. The used lubricating oil regeneration device of claim 1, further comprising: the pre-filter (1) is connected with the flocculation tank (2) and is used for pre-filtering the waste lubricating oil entering the flocculation tank (2) and removing mechanical impurities.

6. The used lubricating oil regeneration device according to claim 5, characterized in that the pre-filter (1) is a media filter comprising a metal mesh.

7. The used lubricating oil regeneration device of claim 1, further comprising: and the condenser (6) is connected to the top of the evaporator (5) and is used for condensing the light components obtained from the top of the evaporator (5) to obtain liquid lubricating oil.

8. The used lubricating oil regeneration device according to claim 1, wherein the pore diameter range of the first hydrophobic ceramic membrane module (8) and/or the second hydrophobic ceramic membrane module (11) is 20-200nm, and the membrane surface water drop contact angle range is 120-160 °.

9. The waste lubricating oil regeneration device as claimed in claim 1, wherein a tubular membrane element (13) is installed in the second hydrophobic ceramic membrane assembly (11), a front seal head (16) and a rear seal head (17) are respectively arranged at the front end and the rear end of the second hydrophobic ceramic membrane assembly (11), a feed inlet (18) is formed in the front seal head (16), a discharge outlet (19) is formed in the rear seal head (17), the outer portion of the tubular membrane element (13) is sleeved in the flower disc (14) and is fixed in the second hydrophobic ceramic membrane assembly (11), a funnel-shaped material pipe (15) is further arranged at the end of the tubular membrane element (13), the funnel-shaped material pipe (15) enables the front seal head (16) and the tubular membrane element (13) to be communicated, and one end of the funnel-shaped material pipe (15) with a larger section radius faces towards the front seal head (16).

10. The used lubricating oil regeneration device of claim 1, further comprising: and the flocculant adding tank (3) is connected to the flocculation tank (2) and is used for adding a flocculant into the flocculation tank (2).