Waste lubricating oil regeneration treatment device with ultrasonic membrane separator

Abstract

The invention relates to the technical field of waste lubricating oil regeneration treatment, in particular to a waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator, the waste lubricating oil regeneration treatment device comprises the membrane separator, a polyolefin membrane and a membrane cleaning mechanism are installed in the membrane separator, and the polyolefin membrane is used for filtering impurities and pollutants in waste lubricating oil; an ultrasonic generator is arranged at the position, corresponding to the polyolefin film, of the film separator, and the ultrasonic generator is used for crushing heavy component impurities in the waste lubricating oil; the membrane cleaning mechanism comprises a flushing plate arranged above the polyolefin membrane and a back-flushing plate arranged below the polyolefin membrane, water is supplied to the flushing plate and the back-flushing plate through a pump body, and the pump body is connected with the water tank through a water pipe. The recovery cost is reduced, the recovery efficiency and the comprehensive recovery rate are improved, and the problems of high cost, high energy consumption, low efficiency and low comprehensive recovery rate generally existing in the waste lubricating oil recovery technology in the prior art are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of waste lubricating oil regeneration and treatment, and in particular to a waste lubricating oil regeneration and treatment device provided with an ultrasonic membrane separator. Background Art

[0002] The recycling of waste lubricating oil is an important environmental protection measure, which can not only reduce environmental pollution, but also realize the reuse of resources. According to the latest information, the treatment methods of waste lubricating oil have formed a relatively complete system. Waste lubricating oil needs to be classified and pretreated before treatment to remove impurities and moisture. The treatment methods mainly include physical treatment, chemical treatment and biological treatment. Common physical treatment methods include centrifugal separation, solvent extraction and distillation.

[0003] At present, the waste lubricating oil regeneration technology widely used in China is still based on separation technologies such as kettle distillation, molecular short-path distillation, and thin film evaporation technology. Although these technologies have certain industrial effects, the waste lubricating oil recovery technology in the existing technology generally has the disadvantages of high cost, high energy consumption, low efficiency, and low comprehensive recovery rate. To this end, we propose a waste lubricating oil regeneration treatment device equipped with an ultrasonic membrane separator. Summary of the invention

[0004] Based on the technical problems existing in the background technology, the present invention proposes a waste lubricating oil regeneration and processing device equipped with an ultrasonic membrane separator, which has the characteristics of reducing recovery costs and improving recovery efficiency, and solves the problems of high cost, high energy consumption, low efficiency and low comprehensive recovery rate commonly existing in the waste lubricating oil recovery technology in the prior art.

[0005] The present invention provides the following technical solution: a waste lubricating oil regeneration and processing device provided with an ultrasonic membrane separator, comprising a membrane separator, wherein a polyolefin membrane and a membrane cleaning mechanism are installed in the membrane separator, wherein the polyolefin membrane is used to filter impurities and pollutants in the waste lubricating oil; an ultrasonic generator is provided at a position corresponding to the polyolefin membrane on the membrane separator, wherein the ultrasonic generator is used to crush heavy component impurities in the waste lubricating oil;

[0006] The membrane separator is provided with a waste oil pipe connected to the oil inlet above the polyolefin membrane, and an oil outlet pipe for discharging the oil is provided below the polyolefin membrane; the membrane cleaning mechanism comprises a flushing plate provided above the polyolefin membrane and a recoil plate provided below the polyolefin membrane, the flushing plate and the recoil plate are both supplied with water through a pump body, and the pump body is connected to a water tank through a water pipe.

[0007] Preferably, the membrane separator is connected to a solvent oil pipe for adding solvent oil, and the solvent oil is used to reduce the viscosity of the waste lubricating oil to increase the membrane flux of the polyolefin membrane.

[0008] Preferably, the membrane cleaning mechanism also includes an alkaline cleaning agent tank and an acidic cleaning agent tank, the water pipe of the pump body is respectively connected to the alkaline cleaning agent tank and the acidic cleaning agent tank through a three-way valve, and the alkaline cleaning agent tank and the acidic cleaning agent tank are both provided with sealing valves, and the pump body is used to successively transport the alkaline cleaning agent and the acidic cleaning agent to the flushing plate and the recoil plate.

[0009] Preferably, a spacer is provided on one side of the polyolefin membrane to make the polyolefin membrane in an inclined state, and a sewage pipe 1 is installed on the side of the lower side of the polyolefin membrane of the membrane separator, and the sewage pipe 1 is used to discharge pollutants flushed from the top of the polyolefin membrane;

[0010] A second sewage pipe is provided at the bottom of the membrane separator and below the polyolefin membrane, and the second sewage pipe is used to discharge pollutants flushed out from below the polyolefin membrane;

[0011] The sewage pipe one and the sewage pipe two are connected to the sewage tank.

[0012] Preferably, a stirring motor is installed on the top of the membrane separator, the output shaft of the stirring motor is connected to the hollow stirring rod inside the membrane separator, a stirring frame is provided on the hollow stirring rod, and the bottom of the hollow stirring rod is connected to a flushing plate, and a plurality of evenly distributed flushing ports are provided on the flushing plate;

[0013] The hollow stirring rod is connected to a pipe one through a rotating joint one, the pipe one is connected to a pump body, and the stirring motor is used to drive the stirring frame to stir and drive the flushing plate to rotate and flush the polyolefin film.

[0014] Preferably, a flushing motor is installed at the bottom of the membrane separator, the output shaft of the flushing motor is connected to the hollow shaft in the membrane separator, the hollow shaft is connected to the recoil plate, and the recoil plate is provided with a plurality of evenly distributed flushing ports 2;

[0015] The hollow shaft is connected to pipeline 2 via rotating joint 2, and pipeline 2 is connected to the pump body.

[0016] Preferably, a pressure gauge 1 for detecting flushing pressure is provided on the first pipeline, a pressure gauge 2 for detecting flushing pressure is provided on the second pipeline, and a controller is installed on the membrane separator.

[0017] Preferably, the waste oil pipe is provided with a flow valve 1 for detecting the amount of waste oil entering, and the solvent oil pipe is provided with a flow valve 2 for detecting the amount of solvent oil added.

[0018] Preferably, the oil outlet pipe of the membrane separator is connected to the distillation tower, and the distillation tower is connected to the nitrogen tank through a nitrogen pipe, and the nitrogen pipe is provided with a gas heating furnace and an air pump.

[0019] Preferably, the membrane separator is provided with a booster pump, and the booster pump is used to increase the internal pressure of the membrane separator to improve the membrane flux of the polyolefin membrane.

[0020] The present invention provides a waste lubricating oil regeneration and processing device provided with an ultrasonic membrane separator. A polyolefin membrane, specifically a polyacrylonitrile membrane, is provided, and its interception rate reaches 99.6%. However, there is a problem that impurities and pollutants affect the membrane flux in the waste lubricating oil separated by the membrane. By providing a membrane cleaning mechanism, the polyolefin membrane can be flushed and backwashed, thereby ensuring the membrane flux of the polyolefin membrane, reducing the recycling cost, improving the recycling efficiency and the comprehensive recycling rate, and solving the problems of high cost, high energy consumption, low efficiency and low comprehensive recycling rate commonly existing in the waste lubricating oil recycling technology in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the membrane separator of the present invention;

[0023] Figure 3 It is an overall schematic diagram of the membrane separator of the present invention applied to a distillation tower.

[0024] In the figure: 1. membrane separator; 2. polyolefin membrane; 3. ultrasonic generator; 4. waste oil pipe; 5. solvent oil pipe; 6. oil outlet pipe; 7. flushing plate; 8. recoil plate; 9. pipeline 1; 10. pipeline 2; 11. pump body; 12. water pipe; 13. alkaline cleaning agent tank; 14. acid cleaning agent tank; 15. sewage pipe 1; 16. sewage pipe 2; 17. sewage tank; 18. stirring motor; 19. hollow stirring rod; 20, stirring frame; 21, rotating joint 1; 22, flushing motor; 23, hollow shaft; 24, rotating joint 2; 25, pressure gauge 1; 26, pressure gauge 2; 27, controller; 28, flow valve 1; 29, flow valve 2; 30, distillation tower; 31, nitrogen pipe; 32, nitrogen tank; 33, gas heating furnace; 34, air pump; 35, flushing port 1; 36, flushing port 2; 37, booster pump. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] The present invention provides a technical solution:

[0027] Embodiment 1:

[0028] like Figure 1 and 2 As shown, a waste lubricating oil regeneration and treatment device provided with an ultrasonic membrane separator includes a membrane separator 1, in which a polyolefin membrane 2 and a membrane cleaning mechanism are installed, and the polyolefin membrane 2 is used to filter impurities and pollutants in the waste lubricating oil; an ultrasonic generator 3 is provided at a position corresponding to the polyolefin membrane 2 on the membrane separator 1, and contact at high temperature will cause the lubricating oil to undergo thermal decomposition and oxidation catalytic reaction, causing the oil product to deteriorate, and will produce asphaltene, colloid, oil coke, and various organic acids, inorganic acids, and oxygen-containing compounds; the heavy component impurities specifically refer to the asphaltene produced by the deterioration of the waste lubricating oil, and the ultrasonic generator 3 can crush the heavy component impurities in the waste lubricating oil. The ultrasonic generator 3 has a transducer and other auxiliary devices, which are not shown in the figure.

[0029] In the membrane separator 1, a waste oil pipe 4 for oil inlet is connected above the polyolefin membrane 2, and an oil outlet pipe 6 for oil outlet is arranged below the polyolefin membrane 2; the membrane cleaning mechanism includes a flushing plate 7 arranged above the polyolefin membrane 2 and a recoil plate 8 arranged below the polyolefin membrane 2, and the flushing plate 7 and the recoil plate 8 are both supplied with water through a pump body 11, and the pump body 11 is connected to a water tank through a water pipe 12. Cleaning the polyolefin membrane 2 is an important step in membrane technology. The flushing plate 7 and the recoil plate 8 can effectively remove pollutants on the membrane to ensure the normal operation of the membrane separator 1.

[0030] By setting up a polyolefin membrane 2, specifically a polyacrylonitrile membrane, the retention rate of which reaches 99.6%. Since there are impurities and pollutants in the membrane separation waste lubricating oil that affect the membrane flux, a membrane cleaning mechanism is set up to flush and backwash the polyolefin membrane 2, thereby ensuring the membrane flux of the polyolefin membrane 2, reducing the recycling cost, and improving the recycling efficiency and the comprehensive recovery rate.

[0031] Polyacrylonitrile membranes are able to retain pollutants with a relative molecular mass of more than 50,000, including combustion products (such as water, smoke, carbon, lead and fuel), wear products (such as road dust, wear metals) and chemical reaction products (oxidation and degradation of additives) in waste lubricating oils, dust and sediment.

[0032] Embodiment 2:

[0033] On the basis of the first embodiment, a solvent oil pipe 5 for adding solvent oil is connected to the membrane separator 1, and the solvent oil is used to reduce the viscosity of the waste lubricating oil to improve the membrane flux of the polyolefin membrane 2. Too high viscosity will directly affect the membrane flux, and mixing the solvent oil with the waste lubricating oil can effectively reduce the viscosity of the waste lubricating oil and improve the membrane flux.

[0034] The membrane cleaning mechanism also includes an alkaline cleaning agent tank 13 and an acid cleaning agent tank 14. The water pipe 12 of the pump body 11 is connected to the alkaline cleaning agent tank 13 and the acid cleaning agent tank 14 respectively through a three-way valve. The alkaline cleaning agent tank 13 and the acid cleaning agent tank 14 are both provided with sealing valves. The pump body 11 is used to transport the alkaline cleaning agent and the acid cleaning agent to the flushing plate 7 and the recoil plate 8 in turn.

[0035] The large particle contaminants on the membrane surface are removed by isobaric flushing and backwashing using the flushing plate 7 and the backwashing plate 8. The polyolefin membrane 2 is then cleaned with an alkaline cleaning agent in the alkaline cleaning agent tank 13, specifically sodium hydroxide, which can effectively remove organic contaminants such as proteins, polysaccharides and oily substances. After the alkaline cleaning agent is cleaned, the polyolefin membrane 2 is cleaned with an acidic cleaning agent in the acidic cleaning agent tank 14, specifically citric acid or hydrochloric acid, to remove inorganic salt scaling of the polyolefin membrane 2, such as sulfates and carbonates.

[0036] Embodiment three:

[0037] On the basis of the second embodiment, a pad is provided on one side of the polyolefin membrane 2, so that the polyolefin membrane 2 is in an inclined state, and the inclined state helps the pollutants generated after flushing to be transferred to one side under the action of gravity. The membrane separator 1 is provided with a drain pipe 15 on the side of the lower side of the polyolefin membrane 2, and the drain pipe 15 can discharge the pollutants flushed from the top of the polyolefin membrane 2;

[0038] A second drain pipe 16 is provided at the bottom of the membrane separator 1 and below the polyolefin membrane 2. The second drain pipe 16 can discharge pollutants flushed out from below the polyolefin membrane 2. The first drain pipe 15 and the second drain pipe 16 are connected to a sewage tank 17. The sewage tank 17 can accommodate pollutants flushed from above and below the polyolefin membrane 2.

[0039] Embodiment 4:

[0040] On the basis of the third embodiment, a stirring motor 18 is installed on the top of the membrane separator 1, and the output shaft of the stirring motor 18 is connected to the hollow stirring rod 19 inside the membrane separator 1, and a stirring frame 20 is provided on the hollow stirring rod 19, and the bottom of the hollow stirring rod 19 is connected to the flushing plate 7, and a plurality of evenly distributed flushing ports 35 are opened on the flushing plate 7;

[0041] The hollow stirring rod 19 is connected to the pipe 9 through a rotating joint 21, and the pipe 9 is connected to the pump body 11. The stirring motor 18 can drive the stirring frame 20 to stir, and drive the flushing plate 7 to rotate and flush the polyolefin membrane 2. The stirring motor 18 drives the stirring rod to rotate, and then drives the waste lubricating oil and solvent oil to mix. The stirring motor 18 drives the flushing plate 7 to rotate and flush the polyolefin membrane 2, thereby increasing the flushing range and flushing more evenly. The pump body 11 transports high-pressure water and cleaning agent to the flushing plate 7 through the pipe 9, the rotating joint 21 and the hollow stirring rod 19. The pipeline, cleaning device and body for conveying the flushing agent are made of anti-corrosion materials to avoid corrosion of equipment and pipes, and at the same time prevent pollutants generated after corrosion from entering the membrane separator 1.

[0042] A flushing motor 22 is installed at the bottom of the membrane separator 1. The output shaft of the flushing motor 22 is connected to the hollow shaft 23 in the membrane separator 1. The hollow shaft 23 is connected to the recoil plate 8. The recoil plate 8 is provided with a plurality of evenly distributed flushing ports 36. The backwashing plate 7 is driven by the flushing motor 22 to rotate to achieve backwashing of the polyolefin membrane 2, thereby improving the cleaning effect.

[0043] The hollow shaft 23 is connected to the second pipe 10 through the second rotating joint 24, and the second pipe 10 is connected to the pump body 11. The pump body 11 adds high-pressure water and cleaning agent into the backwashing plate 7 through the second pipe 10, the second rotating joint 24 and the hollow shaft 23.

[0044] Embodiment five:

[0045] On the basis of the fourth embodiment, a pressure gauge 1 25 for detecting the flushing pressure is provided on the first pipe 9, a pressure gauge 2 26 for detecting the flushing pressure is provided on the second pipe 10, and a controller 27 is installed on the membrane separator 1. Since the flushing pressure has an influence on the cleaning degree of the polyolefin membrane 2, and excessive flushing pressure will damage the membrane structure, the flushing pressure can be monitored by providing the pressure gauge 1 25 and the pressure gauge 2 26 to avoid damaging the membrane structure. The controller 27 adopts a PLC control system, which can collect data from various sensors and control the opening and closing of the pump body 11, the stirring motor 18, the flushing motor 22, the air pump 34 and various valves according to the data.

[0046] The waste oil pipe 4 is provided with a flow valve 1 28 for detecting the amount of waste oil inlet, and the solvent oil pipe 5 is provided with a flow valve 2 29 for detecting the amount of solvent oil added. The flow valve 1 28 and the flow valve 2 29 adjust the viscosity of the waste lubricating oil by controlling the ratio of the waste lubricating oil and the solvent oil, thereby controlling the membrane flux of the polyolefin membrane 2.

[0047] like Figure 3As shown, the oil outlet pipe 6 of the membrane separator 1 is connected to the distillation tower 30, and the distillation tower 30 is connected to the nitrogen tank 32 through the nitrogen pipe 31, and the nitrogen pipe 31 is provided with a gas heating furnace 33 and an air pump 34. Since solvent oil is added to the membrane separator 1 to reduce the viscosity of the waste lubricating oil, the solvent oil in the regenerated lubricating oil can be better removed by passing nitrogen.

[0048] The membrane separator 1 is provided with a booster pump 37 , which can increase the internal pressure of the membrane separator 1 to improve the membrane flux of the polyolefin membrane 2 .

[0049] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator, characterized in that: The invention comprises a membrane separator (1), wherein a polyolefin membrane (2) and a membrane cleaning mechanism are installed in the membrane separator (1), wherein the polyolefin membrane (2) is used to filter impurities and pollutants in waste lubricating oil; an ultrasonic generator (3) is arranged at a position corresponding to the polyolefin membrane (2) on the membrane separator (1), wherein the ultrasonic generator (3) is used to crush heavy component impurities in the waste lubricating oil; In the membrane separator (1), a waste oil pipe (4) for oil inlet is connected above the polyolefin membrane (2), and an oil outlet pipe (6) for oil outlet is arranged below the polyolefin membrane (2); the membrane cleaning mechanism comprises a flushing plate (7) arranged above the polyolefin membrane (2) and a recoil plate (8) arranged below the polyolefin membrane (2); the flushing plate (7) and the recoil plate (8) are both supplied with water through a pump body (11), and the pump body (11) is connected to a water tank through a water pipe (12).

2. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: The membrane separator (1) is connected to a solvent oil pipe (5) for adding solvent oil, and the solvent oil is used to reduce the viscosity of the waste lubricating oil to increase the membrane flux of the polyolefin membrane (2).

3. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: The membrane cleaning mechanism also includes an alkaline cleaning agent tank (13) and an acid cleaning agent tank (14). The water pipe (12) of the pump body (11) is connected to the alkaline cleaning agent tank (13) and the acid cleaning agent tank (14) respectively through a three-way valve. The alkaline cleaning agent tank (13) and the acid cleaning agent tank (14) are both provided with sealing valves. The pump body (11) is used to successively transport the alkaline cleaning agent and the acid cleaning agent to the flushing plate (7) and the recoil plate (8).

4. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: A pad is provided on one side of the polyolefin membrane (2) so that the polyolefin membrane (2) is in an inclined state, and a sewage pipe (15) is installed on the side of the lower side of the polyolefin membrane (2) of the membrane separator (1), and the sewage pipe (15) is used to discharge pollutants flushed from the top of the polyolefin membrane (2); A second sewage pipe (16) is provided at the bottom of the membrane separator (1) and below the polyolefin membrane (2), and the second sewage pipe (16) is used to discharge pollutants flushed out from below the polyolefin membrane (2); The sewage pipe 1 (15) and the sewage pipe 2 (16) are connected to the sewage tank (17).

5. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: A stirring motor (18) is installed on the top of the membrane separator (1), the output shaft of the stirring motor (18) is connected to a hollow stirring rod (19) inside the membrane separator (1), a stirring frame (20) is arranged on the hollow stirring rod (19), and the bottom of the hollow stirring rod (19) is connected to a flushing plate (7), and a plurality of evenly distributed flushing ports (35) are opened on the flushing plate (7); The hollow stirring rod (19) is connected to a pipe (9) via a rotating joint (21), and the pipe (9) is connected to a pump body (11). The stirring motor (18) is used to drive the stirring frame (20) to stir, and to drive the flushing plate (7) to rotate and flush the polyolefin film (2).

6. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: A flushing motor (22) is installed at the bottom of the membrane separator (1), the output shaft of the flushing motor (22) is connected to a hollow shaft (23) in the membrane separator (1), the hollow shaft (23) is connected to a recoil plate (8), and a plurality of evenly distributed flushing ports (36) are provided on the recoil plate (8); The hollow shaft (23) is connected to the second pipeline (10) via the second rotating joint (24), and the second pipeline (10) is connected to the pump body (11).

7. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 6, characterized in that: The pipeline one (9) is provided with a pressure gauge one (25) for detecting flushing pressure, the pipeline two (10) is provided with a pressure gauge two (26) for detecting flushing pressure, and the membrane separator (1) is installed with a controller (27).

8. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: The waste oil pipe (4) is provided with a flow valve 1 (28) for detecting the amount of waste oil entering, and the solvent oil pipe (5) is provided with a flow valve 2 (29) for detecting the amount of solvent oil added.

9. The waste lubricating oil regeneration treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: The oil outlet pipe (6) of the membrane separator (1) is connected to a distillation tower (30), and the distillation tower (30) is connected to a nitrogen tank (32) via a nitrogen pipe (31), and a gas heating furnace (33) and an air pump (34) are provided on the nitrogen pipe (31).

10. The waste lubricating oil regeneration and treatment device provided with an ultrasonic membrane separator according to claim 1, characterized in that: The membrane separator (1) is provided with a booster pump (37), and the booster pump (37) is used to increase the internal pressure of the membrane separator (1) to increase the membrane flux of the polyolefin membrane (2).

Images