A stirring tank for waste lubricating oil regeneration

Abstract

The utility model discloses a kind of stirring tanks for waste lubricating oil regeneration, it is related to waste lubricating oil regeneration equipment technical field.The stirring tank includes kettle body, motor one, rotating shaft, stirring rod and three heating pipelines, heating pipeline has multiple arc sections that are arranged in upper and lower interval and located inside kettle body, the arc section of three pipelines is evenly arranged around center rotating shaft.The multiple groups of stirring rods on rotating shaft are located between the arc sections adjacent in upper and lower.This utility model directly goes into kettle body inside by heating pipeline, forms three-dimensional, even heat source distribution, fundamentally solves the problem that the heat transfer path of traditional jacket heating mode is long, center area is unevenly heated, energy consumption is high, realizes the rapid, even heating and stirring of high viscosity waste lubricating oil, effectively improves regenerated oil quality and energy efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of waste lubricating oil regeneration equipment, and in particular to a stirring tank for waste lubricating oil regeneration. Background Technology

[0002] The stirred tank is a key piece of equipment in the waste lubricating oil regeneration process. It is mainly used to heat, stir, and mix waste lubricating oil with other additives (such as decolorizing agents and flocculants) or process media (such as extractants). Since waste lubricating oil usually has high viscosity, contains impurities and asphaltenes, and needs to be heated to a specific temperature during the regeneration process (e.g., preheating before vacuum distillation or molecular distillation), efficient and uniform heating is crucial.

[0003] Currently, the commonly used structure of stirred tanks in the industry mainly includes a tank body, a jacket, and an internal agitator. The heating method typically involves installing a jacket outside the tank body, and introducing heat transfer media such as steam or heat transfer oil into the jacket to heat the tank walls. The heat is then conducted through the tank walls to the waste lubricating oil inside, and the mechanical stirring action of the agitator promotes the homogenization of temperature and composition of the materials inside the tank.

[0004] However, in practical applications, the heat transfer path of the jacketed heating system is radial from the vessel wall to the center. As the heat transfer distance increases, the thermal resistance increases significantly, and a large amount of heat is lost before reaching the central region. This not only leads to uneven heating of the material inside the vessel, but also forces operators to increase the jacket heating medium temperature or extend the heating time to ensure that the material in the central region reaches the process temperature, directly resulting in energy waste. Therefore, there is an urgent need for a new type of stirred tank structure that can enhance the heat transfer and mixing efficiency inside the vessel, especially in the central region, to achieve rapid and uniform heating and stirring of waste lubricating oil, thereby improving the quality of recycled oil and reducing energy consumption. Utility Model Content

[0005] The purpose of this invention is to provide a stirring vessel for waste lubricating oil regeneration, which has the effect of uniformly heating the waste lubricating oil in the stirring vessel.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a stirring tank for waste lubricating oil regeneration, comprising a tank body, three heating pipes that are fixedly inserted back and forth through the tank body wall, a rotating shaft that rotates vertically at the center of the tank body, multiple stirring rods vertically connected to the sides of the rotating shaft, and a motor fixedly installed on the top of the tank body for driving the rotating shaft to rotate; the top of the tank body is provided with a feed inlet and the bottom with a discharge outlet; the heating pipes include multiple arc-shaped sections arranged vertically at intervals, an inlet connected to one end of the uppermost arc-shaped section, an outlet connected to one end of the lowermost arc-shaped section, and multiple branch... The three heating pipes are located inside the vessel body, with their arc-shaped sections connected to the upper and lower adjacent arc sections. They are evenly arranged around a rotating axis at the center of the vessel body. The stirring rods on the rotating axis are divided into multiple groups according to their height, with each group of stirring rods located in the middle of the upper and lower adjacent arc sections. Each group of stirring rods has three rods, all at the same height and evenly arranged around the axis of the rotating axis. The inlet, outlet, and connecting section are all located outside the vessel body, with the inlet and outlet connected to the input and output ends of the heat transfer oil circulation heating system, respectively. The top of the rotating axis rotates out of the top wall of the vessel body and is connected to the output end of a motor.

[0007] A further feature of this invention is that the vessel body includes a vessel body and a vessel lid, and the vessel lid is bolted to the top of the vessel body; the inlet and outlet are located at the top of the vessel lid and the bottom of the vessel body, respectively; and the heating pipe is fixedly inserted through the side wall of the vessel body.

[0008] A further feature of this invention is that a support cylinder for supporting and fixing a motor is fixedly provided on the top of the kettle lid, and the output end of the motor and the top of the rotating shaft are rotatably inserted into the interior of the support cylinder and connected by a coupling.

[0009] A further feature of this invention is that multiple support legs are fixedly arranged at the bottom of the vessel body, and the support legs are evenly arranged around the discharge port.

[0010] A further feature of this invention is that the interior of the vessel body is provided with a cleaning device for cleaning the arc-shaped portion. The cleaning device includes three horizontally rotating rods inside the vessel body, a rotating assembly that drives the three rotating rods to rotate horizontally, and three vertical scrapers located inside the vessel body with their tops fixedly connected to the three rotating rods. The three rotating rods rotate around the center of the arc-shaped portion of the three heating pipes, and the three scrapers are respectively provided with cleaning holes for the arc-shaped portions of the three heating pipes to slide and intersect relative to each other.

[0011] A further feature of this invention is that the vessel body includes a stirring section, a transition section, and a connecting section connected sequentially from bottom to top. The stirring section is in the shape of a barrel with its opening facing upwards, and the arc-shaped section and the stirring rod are located inside the stirring section. The transition section is in the shape of an annular inclined plate, and its inner ring is connected to the top of the stirring section. The connecting section is in the shape of an annular flat plate, and its inner ring is connected to the top of the transition section. The flipping rod is located above the transition section, and its flipping center is located between the outer and inner rings of the transition section.

[0012] The present invention is further configured as follows: the flipping assembly includes three vertical rotating shafts that rotate through the transition section and are respectively connected to three flipping rods at their top ends; three gears that are respectively fixed on the three rotating shafts and located outside the vessel body; a gear ring that is rotatably set outside the vessel body and simultaneously meshes with the three gears; and a motor II that is fixed outside the vessel body and whose output end is connected to the lower end of a rotating shaft.

[0013] A further feature of this invention is that: an annular support plate is horizontally fixed on the outer wall of the stirring part; the lower end of the rotating shaft is rotatably connected to the annular support plate; the second motor is fixed to the bottom of the annular support plate, and the lower end of the rotating shaft rotatably passes through the annular support plate to connect to the output end of the second motor; and a support ring with a supporting gear ring is fixedly provided on the top of the annular support plate for rotating on the annular support plate.

[0014] A further feature of this invention is that a pair of semi-circular arc-shaped baffles are bolted between the annular support plate and the connecting part, and the two baffles together form a protective ring that protects and hides the rotating shaft, gear and gear ring.

[0015] The beneficial effects of this utility model are:

[0016] 1. By placing the arc-shaped sections of three heating pipes directly inside the vessel and ensuring they evenly surround the stirring center, a three-dimensional, radial thermal field is created. This structure significantly shortens the heat transfer path, reduces thermal resistance and heat loss, and enables direct and uniform heating of materials in both the center and surrounding areas of the vessel simultaneously. This effectively avoids the problem of overheating of the vessel walls and insufficient central temperature caused by traditional jacketed heating systems. Furthermore, due to the high internal heating efficiency and low heat loss, there is no need to excessively increase the temperature of the heat transfer medium or extend the heating time to raise the temperature of the central area, thus significantly reducing energy consumption and meeting the requirements of green and energy-saving production.

[0017] 2. The arc-shaped sections of the heating pipes are arranged vertically at intervals, while the stirring rods are cleverly positioned in the gaps between these arc-shaped sections. This layout ensures that the stirring and heating components do not interfere with each other spatially, guaranteeing both the strong shearing and mixing effect of the stirrer on the materials and maximizing the heating area, achieving a perfect combination of efficient stirring and uniform heating.

[0018] 3. This utility model is specially equipped with a cleaning device. The scraper is driven by a motor to slide along the surface of the arc-shaped part, which can effectively remove impurities such as colloids and asphalt adhering to the surface of the heating pipe, prevent the coking layer from affecting the heat transfer efficiency, and ensure the long-term stable operation and heat transfer performance of the equipment. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0021] Figure 2 This is a structural cross-sectional view of this embodiment;

[0022] Figure 3 This is a schematic diagram showing the positional relationship between the heating pipes, rotating shaft, and stirring rod in this embodiment;

[0023] In the diagram, 1. Kettle body; 11. Stirring section; 111. Discharge port; 112. Support leg; 113. Annular support plate; 114. Support ring; 115. Baffle; 12. Transition section; 13. Connecting section; 2. Kettle cover; 21. Feed inlet; 22. Support cylinder; 23. Coupling; 3. Heating pipe; 31. Arc-shaped section; 32. Inlet section; 33. Outlet section; 34. Connecting section; 4. Rotating shaft; 5. Stirring rod; 6. Motor 1; 7. Cleaning device; 71. Tilting rod; 72. Tilting assembly; 721. Rotating shaft; 722. Gear; 723. Gear ring; 724. Motor 2; 73. Scraper; 731. Cleaning hole. Detailed Implementation

[0024] The technical solution of this utility model will now be clearly and completely described with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] Example: A stirred tank for waste lubricating oil regeneration, such as... Figure 1-3As shown, the device includes a vessel body, three heating pipes 3 that are fixedly inserted and traversed through the vessel body wall, a rotating shaft 4 that rotates vertically at the center of the vessel body, multiple stirring rods 5 that are vertically connected to the sides of the rotating shaft 4, and a motor 6 fixedly installed on the top of the vessel body to drive the rotating shaft 4. The vessel body has an inlet 21 at the top and an outlet 111 at the bottom. The heating pipes 3 include multiple arc-shaped sections 31 arranged vertically at intervals, an inlet 32 ​​connecting to one end of the uppermost arc-shaped section 31, an outlet 33 connecting to one end of the lowermost arc-shaped section 31, and multiple connecting sections 34 connecting adjacent upper and lower arc-shaped sections 31. The arc-shaped portion 31 of the heating pipe 3 is located inside the vessel body and is evenly arranged around the rotating shaft 4 at the center of the vessel body. The stirring rods 5 on the rotating shaft 4 are divided into multiple groups according to their height positions, and each group of stirring rods 5 is located between adjacent upper and lower arc-shaped portions 31. Each group of stirring rods 5 has three rods, which are evenly arranged around the axis of the rotating shaft 4 at the same height position. The inlet portion 32, outlet portion 33 and connecting portion 34 are all located outside the vessel body, and the inlet portion 32 and outlet portion 33 are respectively connected to the input and output ends of the heat transfer oil circulation heating system. The top of the rotating shaft 4 rotates out of the top wall of the vessel body and is connected to the output end of the motor 6.

[0026] Furthermore, the vessel body includes a vessel body 1 and a vessel lid 2, with the vessel lid 2 bolted to the top of the vessel body 1. The inlet 21 and outlet 111 are located at the top of the vessel lid 2 and the bottom of the vessel body 1, respectively. The heating pipe 3 is fixedly inserted through the side wall of the vessel body 1. By adopting a detachable connection between the vessel body 1 and the vessel lid 2, the inspection and maintenance of the internal components of the vessel body are facilitated.

[0027] Furthermore, a support cylinder 22 is fixedly installed on the top of the vessel lid 2 to support and fix the motor 6. The output end of the motor 6 and the top of the rotating shaft 4 are rotatably inserted into the interior of the support cylinder 22 and connected by a coupling 23. By using the above-mentioned support cylinder 22 and coupling 23, the motor 6 can be stably installed and fixed, and it is also convenient for staff to maintain and repair the motor 6 and the rotating shaft 4.

[0028] Furthermore, multiple support legs 112 are fixedly installed at the bottom of the vessel body 1, and the support legs 112 are evenly arranged around the discharge port 111. By using the above-mentioned support legs 112, the vessel body 1 can be stably supported, and the height of the discharge port 111 can be raised.

[0029] Furthermore, the interior of the vessel body 1 is also provided with a cleaning device 7 for cleaning the arc-shaped portion 31. The cleaning device 7 includes three horizontally rotating rods 71 ​​inside the vessel body 1, a rotating assembly 72 that drives the three rotating rods 71 ​​to rotate horizontally, and three vertical scrapers 73 located inside the vessel body 1 with their tops fixedly connected to the three rotating rods 71. The three rotating rods 71 ​​rotate around the center of the arc-shaped portion 31 of the three heating pipes 3. The three scrapers 73 are respectively provided with cleaning holes 731 for the arc-shaped portions 31 of the three heating pipes 3 to slide and pass through each other.

[0030] By employing the cleaning device 7 described above, when it is necessary to clean the arc-shaped portion 31 inside the vessel body 1, the flipping assembly 72 first drives the three flipping rods 71 ​​to flip around the center of the arc-shaped portion 31. Then, the three scrapers 73 will slide relative to the three sets of arc-shaped portions 31 under the flipping motion of the flipping rods 71 ​​that are fixedly connected to them. Since the cleaning holes 731 on the scrapers 73 are slidably inserted into the arc-shaped portions 31, the scrapers 73 will scrape and push all the material attached to the surface of the arc-shaped portion 31 to one end of the arc-shaped portion 31 while sliding, so as to ensure that the flowing medium inside the arc-shaped portion 31 can effectively and stably exchange heat with the material inside the vessel body 1.

[0031] Furthermore, the vessel body 1 includes a stirring section 11, a transition section 12, and a connecting section 13 connected sequentially from bottom to top. The stirring section 11 is a barrel shape with its opening facing upwards, and the arc-shaped part 31 and the stirring rod 5 are located inside the stirring section 11. The transition section 12 is an annular inclined plate shape, and its inner ring is connected to the top of the stirring section 11. The connecting section 13 is an annular flat plate shape, and its inner ring is connected to the top of the transition section 12. The flipping rod 71 is located above the transition section 12, and its flipping center is located between the outer and inner rings of the transition section 12. By adopting the above-described vessel body 1 structure, sufficient space for the flipping rod 71 to move inside the vessel body 1 can be provided, and the cleaning effect of the cleaning device 7 can be reasonably achieved.

[0032] Furthermore, the flipping assembly 72 includes three vertically rotating shafts 721 that rotatably pass through the transition section 12 and are respectively connected to three flipping rods 71 ​​at their top ends; three gears 722 that are respectively fixed on the three rotating shafts 721 and located outside the vessel body 1; a gear ring 723 that is rotatably disposed outside the vessel body 1 and simultaneously meshes with the three gears 722; and a second motor 724 that is fixed outside the vessel body 1 and whose output end is connected to the lower end of a rotating shaft 721.

[0033] By employing the aforementioned flipping assembly 72, when it is necessary to drive the three flipping rods 71 ​​to flip, firstly, the second motor 724 drives a rotating shaft 721 to rotate. Then, the gear 722 on the rotating shaft 721 will mesh with the transmission gear ring 723, causing the gear ring 723 to drive the other two gears 722 to rotate. Then, the rotating shaft 721 connected to these two gears 722 will rotate synchronously and in the same direction with the rotating shaft 721 connected to the output end of the second motor 724. Since the top ends of the three rotating shafts 721 are respectively connected to the three flipping rods 71, under the synchronous and unidirectional rotation of the three rotating shafts 721, the three flipping rods 71 ​​will rotate synchronously and in the same direction inside the vessel body 1.

[0034] Furthermore, an annular support plate 113 is horizontally fixed on the outer wall of the stirring section 11. The lower end of the rotating shaft 721 is rotatably connected to the annular support plate 113. The second motor 724 is fixed to the bottom of the annular support plate 113, and the lower end of the rotating shaft 721 rotatably passes through the annular support plate 113 to connect to the output end of the second motor 724. A support ring 114 is fixedly provided on the top of the annular support plate 113 to support the rotating gear ring 723. By using the above-mentioned annular support plate 113 and support ring 114, the rotational movement of the rotating shaft 721 and the gear ring 723 can be stably supported.

[0035] Furthermore, a pair of semi-circular arc-shaped baffles 115 are bolted between the annular support plate 113 and the connecting part 13, and the two baffles 115 can be combined to form a protective ring that protects and hides the rotating shaft 721, gear 722 and gear ring 723.

[0036] The working principle of this embodiment:

[0037] When internal heating of the vessel is required, the external heat transfer oil circulation heating system first supplies heat transfer oil to the feed section of the heating pipe 3. Then, the heat transfer oil flows along the multiple arc-shaped sections 31 and multiple connecting sections 13 of the heating pipe 3, and returns to the heat transfer oil circulation heating system from the outlet section 33 of the heating pipe 3. Since the arc-shaped sections 31 of the heating pipe 3 are all located inside the vessel, and the three arc-shaped sections 31 of the heating pipe 3 are evenly arranged around the rotation axis 4 at the center of the vessel, the heat transfer oil will heat all parts of the vessel when it flows through the arc-shaped sections 31. This heating structure greatly shortens the heat transfer path, reduces thermal resistance and heat loss, and can directly and uniformly heat the material in the center and surrounding areas of the vessel at the same time. It not only effectively avoids the problem of overheating of the vessel wall and insufficient center temperature caused by traditional jacket heating, but also eliminates the need to excessively increase the temperature of the heat transfer medium or extend the heating time in order to increase the temperature of the center area, thereby significantly reducing energy consumption.

[0038] Among them, the arc-shaped parts 31 of the heating pipe 3 are arranged vertically at intervals, while the stirring rod 5 is cleverly arranged in the gaps between these arc-shaped parts 31. This layout ensures that the stirring part 11 and the heating part do not interfere with each other in space, which not only ensures the strong shearing and mixing effect of the stirrer on the material, but also ensures the maximization of the heating area, achieving a perfect combination of efficient stirring and uniform heating.

Claims

1. A stirred tank for regenerating waste lubricating oil, characterized in that, The vessel includes a vessel body, three heating pipes (3) that are fixedly inserted into the vessel body wall, a rotating shaft (4) that rotates vertically at the center of the vessel body, multiple stirring rods (5) that are vertically connected to the sides of the rotating shaft (4), and a motor (6) that is fixedly installed on the top of the vessel body and used to drive the rotating shaft (4) to rotate. The top of the vessel body is provided with a feed inlet (21) and the bottom is provided with a discharge outlet (111). The heating pipes (3) include multiple arc-shaped sections (31) arranged vertically and alternately, an inlet (32) connecting one end of the uppermost arc-shaped section (31), an outlet (33) connecting one end of the lowermost arc-shaped section (31), and multiple connecting sections (34) that connect adjacent upper and lower arc-shaped sections (31). The arc-shaped part (31) of the heating pipe (3) is located inside the vessel body and is evenly arranged around the rotating shaft (4) at the center of the vessel body. The stirring rods (5) on the rotating shaft (4) are divided into multiple groups according to their height positions, and each group of stirring rods (5) is located in the middle of the upper and lower adjacent arc-shaped parts (31). There are three stirring rods (5) in one group, and they are evenly arranged around the axis of the rotating shaft (4) at the same height position. The inlet (32), outlet (33) and connecting part (34) are all located outside the vessel body, and the inlet (32) and outlet (33) are respectively connected to the input end and output end of the heat transfer oil circulation heating system. The top of the rotating shaft (4) rotates out of the top wall of the vessel body and is connected to the output end of the motor (6).

2. The stirred tank for waste lubricating oil regeneration according to claim 1, characterized in that: The vessel body includes a vessel body (1) and a vessel cover (2), and the vessel cover (2) is bolted to the top of the vessel body (1). The feed inlet (21) and the discharge outlet (111) are located at the top of the vessel cover (2) and the bottom of the vessel body (1), respectively. The heating pipe (3) is fixedly inserted through the side wall of the vessel body (1).

3. The stirred tank for waste lubricating oil regeneration according to claim 2, characterized in that: The top of the lid (2) is fixedly provided with a support cylinder (22) for supporting and fixing the motor (6). The output end of the motor (6) and the top of the rotating shaft (4) rotate into the interior of the support cylinder (22) and are connected by a coupling (23).

4. The stirred tank for waste lubricating oil regeneration according to claim 2, characterized in that: The bottom of the vessel body (1) is fixedly provided with multiple support legs (112), and the support legs (112) are evenly arranged around the discharge port (111).

5. The stirred tank for waste lubricating oil regeneration according to claim 2, characterized in that: The vessel body (1) is also provided with a cleaning device (7) for cleaning the arc-shaped part (31). The cleaning device (7) includes three horizontally rotating rods (71) inside the vessel body (1), a rotating assembly (72) that drives the three rotating rods (71) to rotate horizontally, and three vertical scrapers (73) located inside the vessel body (1) with their tops fixedly connected to the three rotating rods (71). The three rotating rods (71) rotate around the center of the arc-shaped part (31) of the three heating pipes (3). The three scrapers (73) are provided with cleaning holes (731) for the arc-shaped part (31) of the three heating pipes (3) to slide and intersect relative to each other.

6. The stirred tank for waste lubricating oil regeneration according to claim 5, characterized in that: The vessel body (1) includes a stirring section (11), a transition section (12) and a connecting section (13) connected sequentially from bottom to top. The stirring section (11) is a barrel shape with the opening facing upwards, and the arc-shaped part (31) and the stirring rod (5) are located inside the stirring section (11). The transition section (12) is an annular inclined plate shape, and the inner ring is connected to the top of the stirring section (11). The connecting section (13) is an annular flat plate shape, and the inner ring is connected to the top of the transition section (12). The flipping rod (71) is located above the transition section (12), and the flipping center is located between the outer ring and the inner ring of the transition section (12).

7. The stirred tank for waste lubricating oil regeneration according to claim 6, characterized in that: The flipping assembly (72) includes three vertical rotating shafts (721) that rotate through the transition section (12) and are respectively connected to three flipping rods (71) at their top ends; three gears (722) that are respectively fixed on the three rotating shafts (721) and located outside the vessel body (1); a gear ring (723) that is rotatably set outside the vessel body (1) and simultaneously meshes with the three gears (722); and a second motor (724) that is fixed outside the vessel body (1) and whose output end is connected to the lower end of a rotating shaft (721).

8. The stirred tank for waste lubricating oil regeneration according to claim 7, characterized in that: An annular support plate (113) is horizontally fixed on the outer wall of the stirring part (11). The lower end of the rotating shaft (721) is rotatably connected to the annular support plate (113). The second motor (724) is fixed to the bottom of the annular support plate (113), and the lower end of the rotating shaft (721) rotates through the annular support plate (113) to connect to the output end of the second motor (724). The top of the annular support plate (113) is fixedly provided with a support ring (114) that rotates on the annular support plate (113).

9. The stirred tank for waste lubricating oil regeneration according to claim 8, characterized in that: A pair of semi-circular arc-shaped baffles (115) are bolted between the annular support plate (113) and the connecting part (13), and the two baffles (115) together form a protective ring that protects and hides the rotating shaft (721), gear (722) and gear ring (723).

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