Settling tank for recycling waste mineral oil

Abstract

The settling tank comprises a settling tank body, a feeding pipe is installed at the top end of the settling tank body, the bottom end of a middle filter screen is attached to the top face of a partition plate, the top end of the middle filter screen is fixed to the bottom face of a top plate, and locking bolts are fixedly installed on the two sides of the center of the top face of a pretreatment tank. A locking nut is installed on the locking bolt, the locking bolt penetrates through a hole formed in the edge of the top plate, a sealing gasket is fixed to the bottom face of the top plate, the bottom face of the sealing gasket is tightly attached to the top face of the pretreatment tank, and a filter plate is fixedly installed between one side of the inner wall of the pretreatment tank and the partition plate; a water supply pipe is fixedly mounted at the top of one side of the inner wall of the pretreatment tank. According to the settling tank for recycling the waste mineral oil, the novel structural design is adopted, solid impurities in oil conveyed into the settling tank are greatly reduced through the multiple pre-filtering and treating mechanisms, and the pre-filtering and treating mechanisms can be conveniently cleaned and maintained and can stably work for a long time.

Description

Technical Field

[0001] The utility model relates to the technical field of waste mineral oil recovery, in particular to a sedimentation tank for waste mineral oil recovery. Background Art

[0002] The sedimentation tank is an important equipment used in the waste mineral oil recovery pot. The sedimentation tank can extract the middle base oil obtained by distillation in the main distillation tower, and extract the NMP base oil, which is then transported to the gas tower for further desolventizing treatment.

[0003] The existing waste mineral oil recovery settling tank directly inputs the middle base oil obtained by distillation of the main distillation tower, without a pre-filtering mechanism. There are still some solid impurities in the middle base oil. Directly inputting the middle base oil into the settling tank will cause the impurities to settle in the settling tank, affecting the quality of the extracted NMP base oil. Therefore, it is necessary to design a waste mineral oil recovery settling tank to address the above problems. Utility Model Content

[0004] The utility model aims to provide a settling tank for waste mineral oil recovery, so as to solve the problem in the above background technology that the existing settling tank for waste mineral oil recovery directly inputs the middle base oil obtained by distillation of the main distillation tower, and no pre-filtering mechanism is designed, and there are still some solid impurities in the middle base oil. Directly inputting the impurities into the settling tank will cause the impurities to settle in the settling tank, thereby affecting the quality of the extracted NMP base oil.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a settling tank for waste mineral oil recovery, comprising a settling tank body, a feed pipe is installed at the top of the settling tank body, a lifting pump is installed at the bottom of the feed pipe, the bottom end of the feed pipe is connected and fixed to one side of the top of a pretreatment tank, a feed pipe is installed at one side of the bottom end of the pretreatment tank, a booster pump is installed on the feed pipe, a partition is fixedly installed at the middle part of the inner side of the pretreatment tank, a top window is opened at the center of the top of the pretreatment tank, and a A middle filter screen, the bottom end of which is fitted with the top surface of the partition, the top end of which is fixed on the bottom surface of the top plate, locking bolts are fixedly installed on both sides of the center of the top surface of the pretreatment tank, locking nuts are installed on the locking bolts, and the locking bolts pass through the holes opened on the edge of the top plate, a sealing gasket is fixed on the bottom surface of the top plate, and the bottom surface of the sealing gasket is tightly fitted with the top surface of the pretreatment tank, a filter plate is fixedly installed between one side of the inner wall of the pretreatment tank and the partition, and a water supply pipe is fixedly installed on the top of one side of the inner wall of the pretreatment tank.

[0006] Preferably, a first row of waste pipes and a second row of waste pipes are respectively installed on both sides of the bottom of the front end of the pretreatment tank, and the first row of waste pipes and the second row of waste pipes are symmetrically distributed about the center of the pretreatment tank.

[0007] Preferably, the center of the partition and the center of the pretreatment tank are on the same vertical plane, the top of the partition is higher than the bottom of the feed pipe, and the bottom of the feed pipe is higher than the horizontal center of the pretreatment tank.

[0008] Preferably, two sides of the middle filter are tightly fitted to the inner wall of the pretreatment tank, and the top of the middle filter is tightly fitted to the inner wall of the top window.

[0009] Preferably, the locking bolts are tightly fitted with the inner walls of the holes opened on both sides of the top plate, and the locking bolts are symmetrically distributed about the center of the top plate.

[0010] Preferably, the filter plates are densely distributed at equal intervals on one side of the partition plate, and the mesh diameters of the filter plates decrease from bottom to top.

[0011] Preferably, a high-pressure nozzle is installed at the bottom end of the water supply pipe, and the high-pressure nozzle is installed vertically.

[0012] Preferably, the high-pressure nozzles are densely arranged at equal intervals at the bottom of the water supply pipe, and the water supply pipes are distributed horizontally at equal intervals.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the waste mineral oil recovery sedimentation tank adopts a new structural design, and through multiple pre-filtering and processing mechanisms, the solid impurities in the oil transported into the sedimentation tank are greatly reduced, and the pre-filtering and processing mechanisms can be easily cleaned and maintained, and can work stably for a long time;

[0014] 1. The impurities in the oil are intercepted by the filter plate and the middle filter screen, and the filtered oil is precipitated on the other side of the partition. The middle and upper clear liquid is extracted through the feed pipe, which greatly reduces the solid impurities in the oil transported into the sedimentation tank;

[0015] 2. The middle filter can be easily disassembled and cleaned through the top plate, locking bolts and locking nuts. The impurities trapped by the filter plate can be flushed with a high-pressure nozzle and finally discharged through the second row of waste pipes. The impurities precipitated on the other side of the partition can also be discharged through the first row of waste pipes, ensuring that the filtering mechanism can work stably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the front cross-sectional structure of the pretreatment tank of the utility model;

[0018] Figure 3 This is a schematic diagram of the side cross-sectional structure of the pretreatment tank of the utility model;

[0019] Figure 4 This is a schematic diagram of the top view of the pretreatment tank of the utility model;

[0020] Figure 5 It is a schematic diagram of the cross-sectional structure of the filter screen in the utility model when viewed from above.

[0021] In the figure: 1. sedimentation tank body; 2. feed pipe; 3. lifting pump; 4. pretreatment tank; 5. feed pipe; 6. booster pump; 7. partition; 8. top window; 9. middle filter; 10. top plate; 11. locking bolt; 12. locking nut; 13. sealing gasket; 14. filter plate; 15. water supply pipe; 16. high-pressure nozzle; 17. first row waste pipe; 18. second row waste pipe. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides a technical solution: a sedimentation tank for recycling waste mineral oil, including a sedimentation tank body 1, a feed pipe 2, a lifting pump 3, a pretreatment tank 4, a feeding pipe 5, a booster pump 6, a partition 7, a top window 8, a middle filter 9, a top plate 10, a locking bolt 11, a locking nut 12, a sealing gasket 13, a filter plate 14, a water supply pipe 15, a high-pressure nozzle 16, a first row of waste pipes 17 and a second row of waste pipes 18. The top of the sedimentation tank body 1 is equipped with a feed pipe 2, the bottom of the feed pipe 2 is equipped with a lifting pump 3, the bottom end of the feed pipe 2 is connected and fixed to one side of the top of the pretreatment tank 4, the bottom side of the pretreatment tank 4 is equipped with a feed pipe 5, and the booster pump 6 is installed on the feed pipe 5. A partition 7 is fixedly installed on the middle part of the inner side of the tank 4, a top window 8 is opened in the center of the top of the pretreatment tank 4, a middle filter screen 9 is installed through the top window 8, the bottom end of the middle filter screen 9 is in contact with the top surface of the partition 7, the top of the middle filter screen 9 is fixed on the bottom surface of the top plate 10, locking bolts 11 are fixedly installed on both sides of the center of the top surface of the pretreatment tank 4, locking nuts 12 are installed on the locking bolts 11, the locking bolts 11 pass through the holes opened on the edge of the top plate 10, a sealing gasket 13 is fixed on the bottom surface of the top plate 10, and the bottom surface of the sealing gasket 13 is tightly fitted with the top surface of the pretreatment tank 4, a filter plate 14 is fixedly installed between one side of the inner wall of the pretreatment tank 4 and the partition 7, and a water supply pipe 15 is fixedly installed on the top of one side of the inner wall of the pretreatment tank 4.

[0024] In this example, a first row of waste pipes 17 and a second row of waste pipes 18 are installed on both sides of the bottom of the front end of the pretreatment tank 4, respectively. The first row of waste pipes 17 and the second row of waste pipes 18 are symmetrically distributed about the center of the pretreatment tank 4. The above structural design facilitates the discharge of impurities trapped and precipitated on both sides of the partition 7.

[0025] The center of the partition 7 and the center of the pretreatment tank 4 are on the same vertical plane, the top of the partition 7 is higher than the bottom of the feed pipe 2, and the bottom of the feed pipe 2 is higher than the horizontal center of the pretreatment tank 4. The above structural design enables the oil to be filtered and precipitated on both sides of the partition 7, and the feed pipe 2 can extract the treated middle and upper clear liquid.

[0026] The two sides of the middle filter screen 9 are closely fitted with the inner wall of the pretreatment tank 4 , and the top of the middle filter screen 9 is closely fitted with the inner wall of the top window 8 . The above structural design ensures that the oil must float up and pass through the middle filter screen 9 for filtration.

[0027] The locking bolts 11 fit tightly against the inner walls of the holes opened on both sides of the top plate 10 , and the locking bolts 11 are symmetrically distributed about the center of the top plate 10 . The above structural design can stably install and fix the top plate 10 .

[0028] The filter plates 14 are densely distributed at equal intervals on one side of the partition 7, and the mesh diameters of the filter plates 14 decrease from bottom to top. The above structural design enables the filter plates 14 to filter impurities in layers to avoid all impurities accumulating on one layer of the filter screen and causing blockage.

[0029] A high-pressure nozzle 16 is installed at the bottom end of the water supply pipe 15. The high-pressure nozzle 16 is installed vertically. The above structural design can flush the lower structure.

[0030] The high-pressure nozzles 16 are densely arranged at equal intervals at the bottom of the water supply pipe 15, and the water supply pipe 15 is horizontally evenly distributed. The above structural design enables the high-pressure water flow to effectively flush the impurities trapped on the filter plate 14 from top to bottom.

[0031] Working principle: When using this device, the middle base oil extracted from the main distillation tower passes through Figure 2 The oil is transported by the feeding pipe 5 in the pretreatment tank 4, and the delivery pressure is increased by the booster pump 6, and the oil enters the space on the right side of the inner partition 7 in the pretreatment tank 4. As the oil increases, the liquid level rises, and the oil passes through the filter plates 14 distributed at equal intervals from bottom to top. The filter plates 14 filter the floating oil, and the impurities are trapped. Then the oil passes through the middle filter screen 9 and enters the space on the left side of the inner partition 7 in the pretreatment tank 4 for precipitation. The remaining impurities are precipitated at the bottom, and the lifting pump 3 installed on the feeding pipe 2 is started to extract the middle and upper clear liquid obtained by precipitation into the sedimentation tank body 1;

[0032] The booster pump 6 is closed periodically to stop inputting the oil into the pretreatment tank 4, and the valves on the first waste pipe 17 and the second waste pipe 18 are opened to discharge the residual oil and precipitated impurities in the pretreatment tank 4, and the water is sprayed downward through the high-pressure nozzle 16 through the external water pump connected to the water supply pipe 15, and the high-speed water flow impacts and cleans the filter plate 14, and the sewage is discharged from the second waste pipe 18, and the valves on the first waste pipe 17 and the second waste pipe 18 are closed. Then, the locking nut 12 is unscrewed from the locking bolt 11, the top plate 10 is moved upward, and the middle filter screen 9 is pulled out from the top window 8 for cleaning. After the cleaning is completed, the top plate 10 and the middle filter screen 9 are installed and reset, and the locking nut 12 is installed on the locking bolt 11 and tightened, and the booster pump 6 can be started again to input the middle base oil into the pretreatment tank 4. This is the working principle of the sedimentation tank for waste mineral oil recovery.

[0033] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A settling tank for waste mineral oil recovery, comprising a settling tank body (1), characterized in that: A feed pipe (2) is installed at the top of the sedimentation tank body (1), a lifting pump (3) is installed at the bottom of the feed pipe (2), the bottom end of the feed pipe (2) is connected and fixed to one side of the top of the pretreatment tank (4), a feed pipe (5) is installed at one side of the bottom end of the pretreatment tank (4), a booster pump (6) is installed on the feed pipe (5), a partition (7) is fixedly installed in the middle of the inner side of the pretreatment tank (4), a top window (8) is opened at the center of the top of the pretreatment tank (4), a middle filter (9) is installed through the top window (8), the bottom end of the middle filter (9) is in contact with the top surface of the partition (7), and the middle filter (9) is fixedly installed in the middle of the inner side of the pretreatment tank (4). ) is fixed on the bottom surface of the top plate (10), locking bolts (11) are fixedly installed on both sides of the center of the top surface of the pretreatment tank (4), and locking nuts (12) are installed on the locking bolts (11). The locking bolts (11) pass through the holes opened on the edge of the top plate (10), and a sealing gasket (13) is fixed on the bottom surface of the top plate (10), and the bottom surface of the sealing gasket (13) is tightly fitted with the top surface of the pretreatment tank (4). A filter plate (14) is fixedly installed between one side of the inner wall of the pretreatment tank (4) and the partition (7), and a water supply pipe (15) is fixedly installed on the top of one side of the inner wall of the pretreatment tank (4).

2. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: A first row of waste pipes (17) and a second row of waste pipes (18) are respectively installed on both sides of the bottom of the front end of the pretreatment tank (4); the first row of waste pipes (17) and the second row of waste pipes (18) are symmetrically distributed about the center of the pretreatment tank (4).

3. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: The center of the partition (7) and the center of the pretreatment tank (4) are on the same vertical plane, the top of the partition (7) is higher than the bottom of the feed pipe (2), and the bottom of the feed pipe (2) is higher than the horizontal center of the pretreatment tank (4).

4. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: Both sides of the middle filter (9) are tightly fitted to the inner wall of the pretreatment tank (4), and the top of the middle filter (9) is tightly fitted to the inner wall of the top window (8).

5. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: The locking bolts (11) are tightly fitted to the inner walls of holes opened on both sides of the top plate (10), and the locking bolts (11) are symmetrically distributed about the center of the top plate (10).

6. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: The filter plates (14) are densely distributed at equal intervals on one side of the partition plate (7), and the mesh diameters of the filter plates (14) decrease from bottom to top.

7. A settling tank for waste mineral oil recovery according to claim 1, characterized in that: A high-pressure nozzle (16) is installed at the bottom end of the water supply pipe (15), and the high-pressure nozzle (16) is installed vertically.

8. A settling tank for waste mineral oil recovery according to claim 7, characterized in that: The high-pressure nozzles (16) are densely arranged at equal intervals at the bottom end of the water supply pipe (15), and the water supply pipe (15) is horizontally distributed at equal intervals.

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