Lubricating oil recycling device

Abstract

The utility model provides a lubricating oil recycling device, and relates to the technical field of waste oil recycling, the lubricating oil recycling device comprises a buffer tank, an electro-adsorption mechanism, a dechlorination reaction tank, a membrane separation mechanism and a hydrofining reactor, the electro-adsorption mechanism is provided with a treatment box body and an electrode structure, the electrode structure is installed in the treatment box body and used for forming an electric field, and the membrane separation mechanism is installed in the electric field; the treatment box body is respectively connected with the buffer tank and the dechlorination reaction tank, the dechlorination reaction tank is provided with a dechlorination agent adding structure, and the membrane separation mechanism is respectively connected with the dechlorination reaction tank and the hydrofining reactor. The electro-adsorption mechanism is arranged at the front end, so that impurities in waste oil are efficiently removed, the coking at the rear end is avoided, the treatment load is reduced from the source, and the treatment efficiency is improved. The method comprises the following steps of: performing dechlorination treatment to reduce the chlorine content so as to reduce the corrosion of a subsequent device, effectively separating colloidal substances and superfine particle substances in the oil liquid through membrane separation treatment, further reducing the coking problem in rear-end treatment, and finally recycling the raw materials to the maximum extent through hydrotreating.

Description

Technical Field

[0001] The present application relates to the technical field of waste oil recovery, and in particular to a lubricating oil recovery and utilization device. Background Art

[0002] Lubricating oil is a liquid or semi-solid lubricant used on various types of mechanical equipment to reduce friction and protect machinery and processed parts. It mainly plays the role of lubrication, auxiliary cooling, rust prevention, cleaning, sealing and buffering. Lubricating oil used for a long time often contains colloids, coke and other compounds that are easy to deteriorate, age and polymerize during use; various additives for viscosity increase, pour point reduction, dispersion and anti-oxidation; as well as mechanical residues, carbon deposits and other impurities. After a certain period of use, the original lubricating oil needs to be cleaned up and new lubricating oil added. In the composition of the cleaned waste lubricating oil, except for 2%-10% of deteriorated substances, the remaining 90%-98% are good ingredients and can be completely reused.

[0003] Most of the prior art uses a hydrotreating unit for recycling. During the recycling process, due to the high chlorine content in the waste lubricating oil, it is highly corrosive to the treatment device. At the same time, the catalyst of the hydrotreating unit is easily poisoned, resulting in poor recycling and treatment effect.

[0004] In view of this, the present application aims to provide a lubricating oil recovery and utilization device to better solve the above-mentioned technical problems. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a lubricating oil recovery and utilization device, which can solve the technical problem of poor hydrotreating treatment effect of waste lubricating oil.

[0006] An embodiment of the present application provides a lubricating oil recovery and utilization device, comprising a buffer tank, an electric adsorption mechanism, a dechlorination reaction tank, a membrane separation mechanism and a hydrotreating reactor, wherein the electric adsorption mechanism is provided with a processing box and an electrode structure, wherein the electrode structure is installed in the processing box and is used to form an electric field, wherein the processing box is respectively connected to the buffer tank and the dechlorination reaction tank through a first conveying pipe, wherein the dechlorination reaction tank is provided with a dechlorinating agent adding structure, and wherein the membrane separation mechanism is respectively connected to the dechlorination reaction tank and the hydrotreating reactor through a second conveying pipe.

[0007] Furthermore, the electric adsorption mechanism is also provided with a pneumatic vibration pump, and the pneumatic vibration pump is installed in the processing box.

[0008] Furthermore, the electrode structure includes a positive electrode plate and a negative electrode plate, and the working voltage of the positive electrode plate and the negative electrode plate is 1000-2000V.

[0009] Furthermore, the processing box is also provided with a sewage discharge pipeline and a cleaning pipeline.

[0010] Furthermore, an anchor agitator is provided at the bottom end of the dechlorination reaction tank, and a propeller agitator is provided at the upper end of the dechlorination reaction tank.

[0011] Furthermore, the membrane separation mechanism is provided with a separation tank body, the inner wall of the separation tank body is provided with a corrosion-resistant coating, and a ceramic nanofiltration membrane is installed in the separation tank body, and the pore size of the ceramic nanofiltration membrane is 50-150nm.

[0012] Furthermore, a preheating furnace and a mixer are provided at the front end of the hydrotreating reactor, the preheating furnace is connected to the membrane separation mechanism, and the preheating furnace is connected to a liquid catalyst pipeline and a hydrogen pipeline, and the mixer is respectively connected to the preheating furnace and the hydrotreating reactor.

[0013] Beneficial effects of the utility model:

[0014] The lubricating oil recycling device provided by the utility model comprises a buffer tank, an electric adsorption mechanism, a dechlorination reaction tank, a membrane separation mechanism and a hydrofining reactor, wherein the electric adsorption mechanism is provided with a processing box and an electrode structure, wherein the electrode structure is installed in the processing box and is used to form an electric field, wherein the processing box is respectively connected with the buffer tank and the dechlorination reaction tank through a first conveying pipe fitting, wherein the dechlorination reaction tank is provided with a dechlorinating agent adding structure, wherein the membrane separation mechanism is respectively connected with the dechlorination reaction tank and the hydrofining reactor through a second conveying pipe fitting, wherein the utility model has a simple structure and a reasonable design, wherein the electric adsorption mechanism is provided at the front end so as to efficiently remove impurities in the waste oil through the action of the electric field, thereby avoiding coking at the rear end and reducing the processing load from the source, and then reducing the chlorine content through dechlorination treatment to reduce the corrosion of subsequent devices, and effectively separating the colloidal substances and ultrafine particle substances in the oil through membrane separation treatment, thereby further reducing the coking problem of the rear end treatment, and finally recycling the raw materials to the greatest extent through hydrotreatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of some embodiments of the utility model;

[0017] Figure 2 It is a schematic diagram of the processing box structure in some embodiments of the utility model;

[0018] Figure 3 Schematic diagram of membrane separation mechanism in some embodiments of the present invention.

[0019] The reference numerals are:

[0020] Buffer tank 1, electric adsorption mechanism 2, processing box 21, electrode structure 22, pneumatic vibration pump 23, sewage pipeline 24, cleaning pipeline 25, dechlorination reaction tank 3, dechlorination agent addition structure 31, anchor agitator 32, propeller agitator 33, membrane separation mechanism 4, hydrorefining reactor 5, first conveying pipe 6, second conveying pipe 7, preheating furnace 8, liquid catalyst pipeline 81, hydrogen pipeline 82, mixer 9. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] See also Figure 1-Figure 3 As shown, the lubricating oil recovery and utilization device described in this embodiment includes a buffer tank 1, an electric adsorption mechanism 2, a dechlorination reaction tank 3, a membrane separation mechanism 4 and a hydrotreating reactor 5, the electric adsorption mechanism 2 is provided with a processing box 21 and an electrode structure 22, the electrode structure 22 is installed in the processing box 21, and is used to form an electric field, the processing box 21 is connected to the buffer tank 1 and the dechlorination reaction tank 3 through a first conveying pipe 6, the dechlorination reaction tank 3 is provided with a dechlorinating agent adding structure 31, and the membrane separation mechanism 4 is connected to the dechlorination reaction tank 3 and the hydrotreating reactor 5 through a second conveying pipe 7.

[0028] The structure described in this embodiment is simple and reasonably designed. By arranging the electric adsorption mechanism 2 at the front end, the impurities in the waste oil can be efficiently removed through the action of the electric field, and the coking at the rear end can be avoided, thereby reducing the processing load from the source. Then, the chlorine content is reduced through dechlorination treatment to reduce the corrosion of subsequent devices, and the colloidal substances and ultrafine particles in the oil are effectively separated through membrane separation treatment, further reducing the coking problem of the rear end treatment. Finally, the raw materials are recycled to the greatest extent through hydrogenation treatment.

[0029] In some embodiments, the electric adsorption mechanism 2 is further provided with a pneumatic vibration pump 23 , and the pneumatic vibration pump 23 is installed in the processing box 21 .

[0030] In this embodiment, by providing a pneumatic vibration pump 23, the particle impurities can be distributed more evenly through vibration, the gaps can be reduced, the adsorption contact area can be increased, and the adsorption efficiency can be improved.

[0031] In some embodiments, the electrode structure 22 includes a positive electrode plate and a negative electrode plate, and the working voltage of the positive electrode plate and the negative electrode plate is 1000-2000V.

[0032] In this embodiment, a reasonable voltage setting is used to achieve stable and efficient adsorption and effectively remove impurities.

[0033] In some embodiments, the processing box 21 is further provided with a sewage discharge pipeline 24 and a cleaning pipeline 25 .

[0034] In this embodiment, by providing a sewage discharge pipeline 24, it is convenient to discharge the impurities formed by adsorption, and the provision of a cleaning pipeline 25 allows regular cleaning of the processing box 21, which is convenient to use.

[0035] In some embodiments, an anchor stirrer 32 is disposed at the bottom of the dechlorination reaction tank 3 , and a propeller stirrer 33 is disposed at the upper end of the dechlorination reaction tank 3 .

[0036] In this embodiment, an anchor stirrer 32 is provided at the bottom to prevent sedimentation, and a propeller stirrer 33 is provided at the upper end to improve gas absorption efficiency, thereby promoting chlorine removal and achieving a better removal effect.

[0037] In some embodiments, the membrane separation mechanism 4 is provided with a separation tank body, the inner wall of the separation tank body is provided with a corrosion-resistant coating, and a ceramic nanofiltration membrane is installed in the separation tank body, and the pore size of the ceramic nanofiltration membrane is 50-150 nm.

[0038] This embodiment specifically shows that membrane treatment is performed using a ceramic nanofiltration membrane to further remove impurities and chloride salts in the waste oil, further reduce the coking problem in the back-end treatment, and the catalyst failure problem.

[0039] Specifically, see Appendix Figure 3 As shown, in this embodiment, three separation tanks can be arranged in parallel to improve the processing efficiency.

[0040] In some embodiments, a preheating furnace 8 and a mixer 9 are provided at the front end of the hydrotreating reactor 5. The preheating furnace 8 is connected to the membrane separation mechanism 4, and the preheating furnace 8 is connected to a liquid catalyst pipeline 81 and a hydrogen pipeline 82. The mixer 9 is respectively connected to the preheating furnace 8 and the hydrotreating reactor 5.

[0041] In this embodiment, the lubricating oil raw material is recycled to the greatest extent through hydrogenation treatment, the impurities in the oil product are effectively removed, and the stability of the product is improved. In this embodiment, a multi-stage hydrogenation reactor in the prior art is specifically used to improve efficiency and product purity.

[0042] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A lubricating oil recovery and utilization device, characterized in that: It includes a buffer tank, an electric adsorption mechanism, a dechlorination reaction tank, a membrane separation mechanism and a hydrofining reactor. The electric adsorption mechanism is provided with a processing box and an electrode structure. The electrode structure is installed in the processing box to form an electric field. The processing box is connected to the buffer tank and the dechlorination reaction tank through a first conveying pipe, respectively. The dechlorination reaction tank is provided with a dechlorinating agent adding structure. The membrane separation mechanism is connected to the dechlorination reaction tank and the hydrofining reactor through a second conveying pipe.

2. The lubricating oil recovery and utilization device according to claim 1, characterized in that: The electric adsorption mechanism is also provided with a pneumatic vibration pump, and the pneumatic vibration pump is installed in the processing box.

3. The lubricating oil recovery and utilization device according to claim 1, characterized in that: The electrode structure comprises a positive electrode plate and a negative electrode plate, and the working voltage of the positive electrode plate and the negative electrode plate is 1000-2000V.

4. The lubricating oil recovery and utilization device according to claim 1, characterized in that: The processing box is also provided with a sewage discharge pipeline and a cleaning pipeline.

5. The lubricating oil recovery and utilization device according to claim 1, characterized in that: An anchor stirrer is arranged at the bottom of the dechlorination reaction tank, and a propeller stirrer is arranged at the upper end of the dechlorination reaction tank.

6. The lubricating oil recovery and utilization device according to claim 1, characterized in that: The membrane separation mechanism is provided with a separation tank body, the inner wall of the separation tank body is provided with a corrosion-resistant coating, and a ceramic nanofiltration membrane is installed in the separation tank body, and the pore size of the ceramic nanofiltration membrane is 50-150nm.

7. The lubricating oil recovery and utilization device according to claim 1, characterized in that: A preheating furnace and a mixer are provided at the front end of the hydrotreating reactor. The preheating furnace is connected to the membrane separation mechanism, and is connected to a liquid catalyst pipeline and a hydrogen pipeline. The mixer is respectively connected to the preheating furnace and the hydrotreating reactor.

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