Static oiling machine waste oil recycling device

Abstract

The application relates to the field of electrostatic oiling, in particular to a waste oil recycling device of an electrostatic oiling machine, which comprises a box body, a heating pipe is fixedly connected to the bottom of the box body, a first air inlet pipe is communicated with one side of the upper end of the box body, an air outlet pipe is communicated with the other side of the upper end of the box body, an electromagnetic valve is arranged at the top of the box body, carbon dioxide gas is introduced into the first air inlet pipe, the density of the carbon dioxide is greater than that of air, therefore, after the carbon dioxide enters the box body, the carbon dioxide will sink, and the air will be discharged from the air outlet pipe, the heating pipe is started, the heating temperature is set to 100 DEG C, water is evaporated to form water vapor, the water vapor passes through the oil layer and the carbon dioxide layer in sequence, and is discharged from the air outlet pipe, when the other end of the air outlet pipe no longer discharges the water vapor, the water under the oil layer is completely separated, at the moment, only the carbon dioxide and the oil exist in the box body, and after the water molecules and the water vapor in the air are recondensed into water, the water will not return to the box body.

Description

Technical Field

[0001] This invention relates to the field of electrostatic oiling technology, and in particular to a device for recycling and reusing waste oil from an electrostatic oiling machine. Background Technology

[0002] To prevent steel coils from oxidizing and rusting during transportation and storage, the cold rolling line needs to use an electrostatic oiling machine to spray rust-removing oil on the upper and lower surfaces of the strip before coiling it. This prevents air and impurities from contacting the strip surface and causing oxidation, thus avoiding affecting the quality of the strip.

[0003] An electrostatic oiling machine utilizes the principle of electrostatic adsorption. A high-voltage power supply transmits negative high-voltage static electricity to a high-voltage electrode, creating an electrostatic field between the strip steel and the electrode. The oil droplets sprayed from the spray gun or spray disc carry a negative charge and atomize in the electrostatic field, adhering to the surface of the strip steel. During the spraying process, a small amount of oil does not adhere to the surface of the strip steel, and some oil drips from the strip steel. To reduce oil waste, a collection device is installed to collect the oil that does not adhere to the surface of the strip steel and the oil that drips from the surface of the strip steel into an oil collection tank.

[0004] However, because oil droplets are negatively charged, they attract fine dust and water molecules from the air during their movement. The oil droplets combine with water molecules to form water, which then enters the oil collection tank along with the oil. Furthermore, oil dripping from the steel strip comes into contact with burrs and debris on the strip surface, causing the oil collection tank to contain too many impurities, making direct recycling impossible. Additionally, because oil is less dense than water, the oil and water will separate. While the upper layer of oil can be poured directly from the collection tank into other containers for separation, a small amount of oil needs to be left in the collection tank to isolate the water and prevent it from entering other containers. The remaining oil and water in the collection tank are difficult to completely separate and cannot be recycled, resulting in waste. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the difficulty in completely separating water and oil in the prior art.

[0006] To solve the above-mentioned technical problems, the present invention provides a waste oil recycling and reuse device for electrostatic oiling machines, characterized in that: it includes a box; a heating tube is fixedly connected to the bottom of the box; a first air inlet pipe is connected to one side of the upper end of the box; an exhaust pipe is connected to the other side of the upper end of the box; and a solenoid valve is provided on the top of the box; the solenoid valve is used to control the entry of waste oil into the box.

[0007] In one embodiment of the present invention, a bottom cavity is provided at the bottom of the housing; the heating tube is located inside the bottom cavity;

[0008] In one embodiment of the present invention, the heating tube is turbine-shaped and located at the bottom center of the housing;

[0009] In one embodiment of the present invention, two first rotating shafts are rotatably connected inside the box; the first rotating shafts are respectively located at both ends of the box; a plurality of first stirring blades are fixedly connected to the first rotating shafts;

[0010] In one embodiment of the present invention, two gears are rotatably connected to the outer side wall of the housing; the two gears are meshed and connected, and are respectively fixedly connected to one end of a first rotating shaft;

[0011] In one embodiment of the present invention, a separation box is fixedly connected to the top of the box body; the bottom of the separation box has an opening; a second rotating shaft is disposed inside the separation box; the upper end of the second rotating shaft is rotatably connected to the top of the separation box, and the lower end of the second rotating shaft is rotatably connected to the top of the box body; a driving assembly is disposed at one end of the second rotating shaft; the driving assembly is used to drive the second rotating shaft to rotate; a plurality of second stirring blades are fixedly connected to the second rotating shaft; a plurality of magnetic adsorption plates are fixedly connected inside the separation box; and a feed inlet is connected to the upper end of the box body.

[0012] In one embodiment of the present invention, the magnetic adsorption plate is distributed on the outside of the second stirring blade;

[0013] In one embodiment of the present invention, the drive assembly includes a third rotating shaft; the third rotating shaft is located inside the housing and its upper end is rotatably connected to the top of the housing; the third rotating shaft is located at one end of the housing near the first air inlet pipe; a plurality of third stirring blades are fixedly connected to the third rotating shaft; the upper end of the third rotating shaft and the lower end of the second rotating shaft are driven by a belt and a pulley.

[0014] In one embodiment of the present invention, a top cavity is provided at the top of the housing; the belt and pulley are located within the top cavity;

[0015] In one embodiment of the present invention, an impurity filter box is provided on one side of the box body; a second air inlet pipe is connected to the upper end of one side of the impurity filter box, the lower end of one side of the impurity filter box is connected to one side of the box body, and a discharge pipe is connected to the lower end of the other side of the impurity filter box.

[0016] The technical solution of the present invention has the following advantages over the prior art:

[0017] 1. In order to separate water from waste oil, this invention introduces carbon dioxide gas through the first air inlet pipe. Since carbon dioxide is denser than air, it sinks after entering the chamber, causing air to be discharged from the exhaust pipe. The heating element is activated, and the heating temperature is set to 100°C. Water evaporates to form water vapor, which passes through the oil layer and the carbon dioxide layer in sequence and is discharged from the chamber through the exhaust pipe. When no more water vapor is discharged from the other end of the exhaust pipe, all the water below the oil layer has been separated. At this time, only carbon dioxide and oil remain in the chamber. Since carbon dioxide is continuously introduced through the first air inlet pipe and continuously discharged through the exhaust pipe, water vapor outside the chamber cannot enter the chamber.

[0018] 2. To help the heated steam quickly pass through the oil layer and exit the tank, after the heating pipe is activated, since the heating pipe is turbine-shaped and located in the middle of the bottom of the tank, the water directly above the heating pipe in the tank is heated first. Because the density of hot water is less than that of cold water, the water heated in the middle will rise, creating an upward water flow. The water flow drives the first stirring blade to move, and the first stirring blade drives the stirring shaft to rotate, ultimately causing the stirring shaft to stir in the tank. This helps the heated steam to quickly move to the surface of the oil with the water flow, separate from the oil layer, pass through the carbon dioxide, and exit the tank through the exhaust pipe. Gears cause the two first rotating shafts to rotate simultaneously by the same angle, preventing the first stirring blades from colliding with each other.

[0019] 3. To make the second rotating shaft rotate, carbon dioxide is introduced into the chamber through the first air inlet pipe. When the carbon dioxide enters the chamber, it will generate airflow. Since the third rotating shaft is close to the connection between the first air inlet pipe and the chamber, the carbon dioxide airflow drives the third stirring blade on one side of the third rotating shaft to rotate, thus rotating the third rotating shaft. The third rotating shaft drives the second rotating shaft to rotate through the belt and pulley. At the same time, carbon dioxide enters the chamber, causing the air inside the chamber to be expelled. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the main structure of one embodiment of the present invention. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the main structure of one embodiment of the present invention. Figure 2 ;

[0023] Figure 3 This is a structural cross-sectional view of the box body and separation box according to an embodiment of the present invention;

[0024] Figure 4This is a schematic diagram of a heating tube structure according to an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the first rotating shaft, the first stirring blade, and the gear structure according to an embodiment of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the second rotating shaft, the second stirring blade, and the drive assembly according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of a magnetic adsorption plate structure according to an embodiment of the present invention.

[0028] Explanation of reference numerals on the accompanying drawings:

[0029] 1. Housing; 2. Heating element; 3. First air inlet pipe; 4. Exhaust pipe; 5. Solenoid valve; 6. First rotating shaft; 7. First stirring blade; 8. Gear; 9. Separation box; 10. Second rotating shaft; 11. Drive assembly; 111. Third rotating shaft; 112. Third stirring blade; 12. Second stirring blade; 13. Magnetic adsorption plate; 14. Feed inlet; 15. Impurity filter box; 16. Discharge pipe. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] Reference Figures 1-6 As shown, a waste oil recycling and reuse device for an electrostatic oiling machine includes a housing 1; a heating pipe 2 is fixedly connected to the bottom of the housing 1; a bottom cavity is formed at the bottom of the housing 1; the heating pipe 2 is located inside the bottom cavity; a first air inlet pipe 3 is connected to one side of the upper end of the housing 1; an exhaust pipe 4 is connected to the other side of the upper end of the housing 1; a solenoid valve 5 is provided on the top of the housing 1; the solenoid valve 5 is used to control the entry of waste oil into the housing 1.

[0032] First, solenoid valve 5 is opened, allowing waste oil to enter tank 1. Then, solenoid valve 5 is closed. Because water is denser than oil and water and oil are immiscible, the waste oil separates into layers in tank 1, with the oil layer above the water layer and air above the oil layer. To separate the water from the waste oil, carbon dioxide gas is then introduced through the first air inlet pipe 3. Since carbon dioxide is denser than air and insoluble in oil, it sinks upon entering tank 1, causing the air to rise and exit through exhaust pipe 4. Exhaust pipe 4 contains a carbon dioxide sensor. When the sensor detects carbon dioxide, all air in tank 1 is completely expelled. Finally, heating element 2 is activated. The waste oil in the heating chamber 1 is heated to a temperature of 110°C. The water in the lower layer reaches its boiling point and evaporates to form water vapor. Since the density of water vapor is less than that of carbon dioxide and carbon dioxide has high thermal stability, the water vapor passes through the oil layer and the carbon dioxide layer in sequence and is discharged from the chamber 1 through the exhaust pipe 4. The temperature of the exhaust pipe 4 is low, and a small amount of water vapor condenses into water. Since the heating temperature is 110°C, the oil has not reached its boiling point. Therefore, when no more water vapor is discharged from the other end of the exhaust pipe 4, the water below the oil layer is completely separated. At this time, only carbon dioxide and oil remain in the chamber 1. Since carbon dioxide is continuously introduced into the first air inlet pipe 3 and continuously discharged from the exhaust pipe 4, water vapor outside the chamber 1 cannot enter the chamber 1.

[0033] In one embodiment of the present invention, the heating tube 2 is turbine-shaped and located at the bottom center of the housing 1; two first rotating shafts 6 are rotatably connected inside the housing 1; the first rotating shafts 6 are respectively located at both ends of the housing 1; a plurality of first stirring blades 7 are fixedly connected to the first rotating shafts 6; two gears 8 are rotatably connected to the outer side wall of the housing 1; the two gears 8 are meshed and fixedly connected to one end of one of the first rotating shafts 6 respectively.

[0034] To help the heated water vapor quickly pass through the oil layer and exit the tank 1, the heating pipe 2 is activated. Since the heating pipe 2 is turbine-shaped and located in the middle of the bottom of the tank 1, the water directly above the heating pipe 2 in the tank 1 is heated first. Because the density of hot water is less than that of cold water, the water heated in the middle will rise, generating an upward water flow. The water flow drives the first stirring blade 7 to move, and the first stirring blade 7 drives the first rotating shaft 6 to rotate, ultimately causing the first rotating shaft 6 to stir in the tank 1. This helps the heated water vapor move quickly to the surface of the oil with the water flow and separate from the oil layer, pass through the carbon dioxide, and exit the tank 1 through the exhaust pipe 4. The gear 8 makes the two first rotating shafts 6 rotate at the same angle, so that the first stirring blades 7 will not collide with each other.

[0035] A separation box 9 is fixedly connected to the top of the box body 1; the bottom of the separation box 9 has an opening; a second rotating shaft 10 is installed inside the separation box 9; the upper end of the second rotating shaft 10 is rotatably connected to the top of the separation box 9, and the lower end of the second rotating shaft 10 is rotatably connected to the top of the box body 1; a drive assembly 11 is installed at one end of the second rotating shaft 10; the drive assembly 11 is used to drive the second rotating shaft 10 to rotate; a plurality of second stirring blades 12 are fixedly connected to the second rotating shaft 10; a plurality of magnetic adsorption plates 13 are fixedly connected inside the separation box 9; the magnetic adsorption plates 13 are distributed outside the second stirring blades 12; and a feed inlet 14 is connected to the upper end of the box body 1.

[0036] To filter the magnetic substances in the waste oil, the waste oil enters the separation tank 9 through the inlet 14. The drive assembly 11 drives the second rotating shaft 10 to rotate, and the second rotating shaft 10 drives the second stirring blade 12 to rotate. Under the action of the second stirring blade 12, the waste oil generates water flow in the separation tank 9 along the rotation direction of the rotating shaft. When rotating, the magnetic substances are subjected to centrifugal force and gradually move away from the second rotating shaft 10 and the second stirring blade 12. They rotate outside the second stirring blade 12. Since the magnetic adsorption plate 13 and the magnetic substances will have a magnetic attraction, after the magnetic substances approach the magnetic adsorption plate 13 during the rotation, the attraction force generated by the magnetic adsorption plate 13 on the magnetic substances becomes larger. Under the action of magnetic attraction, they approach the magnetic adsorption plate 13 and are adsorbed on the magnetic adsorption plate 13.

[0037] The drive assembly 11 includes a third rotating shaft 111; the third rotating shaft 111 is located inside the housing 1 and its upper end is rotatably connected to the top of the housing 1; the third rotating shaft 111 is located at one end of the housing 1 near the first air inlet pipe 3; a plurality of third stirring blades 112 are fixedly connected to the third rotating shaft 111; the upper end of the third rotating shaft 111 is connected to the lower end of the second rotating shaft 10 via a belt and a pulley; a top cavity is provided at the top of the housing 1; the belt and pulley are located inside the top cavity;

[0038] To make the second rotating shaft 10 rotate, carbon dioxide is continuously supplied to the housing 1 from the first air inlet pipe 3. When the carbon dioxide enters the housing 1, it will generate an airflow. Since the third rotating shaft 111 is close to the connection between the first air inlet pipe 3 and the housing 1, the carbon dioxide airflow drives the third stirring blade 112 on one side of the third rotating shaft 111 to rotate, thus rotating the third rotating shaft 111. The third rotating shaft 111 drives the second rotating shaft 10 to rotate through the belt and pulley. At the same time, carbon dioxide enters the housing 1, causing the air in the housing 1 to be expelled. After a period of time, the solenoid valve 5 is opened, and waste oil flows into the housing 1. At this time, the air in the housing 1 also enters the housing 1 with the waste oil. The solenoid valve 5 is then closed to perform water-oil separation.

[0039] An impurity filter box 15 is provided on one side of the box body 1; the lower end of one side of the impurity filter box 15 is connected to one side of the box body 1, and the lower end of the other side of the impurity filter box 15 is connected to a discharge pipe 16.

[0040] To filter out dust and impurities from the waste oil, a second air inlet pipe is connected to the upper side of the impurity filter box 15. Carbon dioxide is introduced into the impurity filter box 15 through the second air inlet pipe to vent the air inside the impurity filter box 15. A control valve is installed in the connecting pipe between the impurity filter box 15 and the box body 1. When the control valve is opened, the waste oil in the box body 1 enters the impurity filter box 15. The impurity filter box 15 filters out dust and impurities from the waste oil through the purification filter element. The impurity filter box 15 is existing technology. The filtered waste oil then flows from the discharge pipe 16 to the external oil storage tank. At this time, the magnetic substances, water, dust and impurities in the waste oil are completely filtered out and can be reused.

[0041] Working principle:

[0042] During operation, waste oil enters the separator 9 through the inlet 14. Carbon dioxide is continuously supplied to the housing 1 from the first air inlet pipe 3. The carbon dioxide generates airflow upon entering the housing 1. Since the third rotating shaft 111 is close to the connection between the first air inlet pipe 3 and the housing 1, the carbon dioxide airflow drives the third stirring blade 112 on one side of the third rotating shaft 111 to rotate, causing the third rotating shaft 111 to rotate. The third rotating shaft 111, through a belt and pulley, drives the second rotating shaft 10 to rotate. Simultaneously, carbon dioxide enters the housing 1, causing the air inside the housing 1 to be expelled. The second rotating shaft 10 drives the second stirring blade 12 to rotate, causing the waste oil to move along the rotating shaft within the separator 9 under the action of the second stirring blade 12. The rotation direction generates water flow. During rotation, the magnetic material is subjected to centrifugal force and gradually moves away from the second rotating shaft 10 and the second stirring blade 12, rotating outside the second stirring blade 12. Due to the magnetic attraction between the magnetic adsorption plate 13 and the magnetic material, the magnetic material approaches the magnetic adsorption plate 13 during rotation, and the attraction force generated by the magnetic adsorption plate 13 on the magnetic material increases. Under the action of magnetic attraction, the material approaches the magnetic adsorption plate 13 and is adsorbed onto the magnetic adsorption plate 13. After the magnetic material in the waste oil is filtered, the solenoid valve 5 is opened, and the waste oil tank 1 is filled with water. Then the solenoid valve 5 is closed. Since the density of water is greater than that of oil, and water and oil are immiscible, the waste oil separates into layers in the tank 1, with the oil layer above the water layer. The top layer is air; next, carbon dioxide gas is introduced through the first air intake pipe 3. After entering the chamber 1, the carbon dioxide, due to its higher density than air and its insolubility in oil, sinks, causing the air to rise and exit through the exhaust pipe 4. The exhaust pipe 4 contains a carbon dioxide sensor; when the sensor detects carbon dioxide, all the air in the chamber 1 is expelled. Finally, the heating element 2 is activated to heat the waste oil in the chamber 1 at a temperature of 100°C. The water in the lower layer reaches its boiling point and evaporates to form water vapor. Because water vapor is less dense than carbon dioxide and carbon dioxide has high thermal stability, the water vapor passes through the oil layer sequentially. The water vapor from the heating pipe 2 is heated and discharged from the exhaust pipe 4 into the tank 1. Since the heating pipe 2 is turbine-shaped and located in the middle of the bottom of the tank 1, the water directly above the heating pipe 2 in the tank 1 is heated first after the heating pipe 2 is started. Since the density of hot water is less than that of cold water, the water heated in the middle will rise and generate an upward water flow. The water flow drives the first stirring blade 7 to move, and the first stirring blade 7 drives the stirring shaft 6 to rotate, which finally makes the stirring shaft 6 stir in the tank 1. This helps the water vapor after the water is heated to move quickly to the surface of the oil with the water flow and separate from the oil layer. It passes through the carbon dioxide and is discharged from the tank 1 from the exhaust pipe 4. The gear 8 makes the two first rotating shafts 6 rotate at the same rotation angle, so that the first stirring blades 7 will not collide with each other.The exhaust pipe 4 has a low temperature, causing a small amount of water vapor to condense into water. Since the heating temperature is 100℃, the oil has not reached its boiling point. Therefore, when no more water vapor is discharged from the other end of the exhaust pipe 4, all the water below the oil layer is separated out. At this time, only carbon dioxide and oil remain in the chamber 1. Water molecules and water vapor in the air condense back into water and will not return to the chamber 1. Carbon dioxide is then introduced into the impurity filter chamber 15 through the second air inlet pipe to vent the air from the impurity filter chamber 15. A control valve is installed in the connecting pipe between the impurity filter chamber 15 and the chamber 1. When the control valve is opened, the waste oil in the chamber 1 enters the impurity filter chamber 15. The impurity filter chamber 15 filters out dust and impurities from the waste oil through the purification filter element, and then flows from the discharge pipe 16 to the external oil storage tank. At this time, the magnetic substances, water, dust, and impurities in the waste oil are completely filtered out and can be reused.

[0043] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A waste oil recycling and reuse device for electrostatic oiling machines, characterized in that: Including the box (1), the bottom of the box (1) is fixedly connected with a heating pipe (2), one side of the upper end of the box (1) is communicated with a first air inlet pipe (3), the other side of the upper end of the box (1) is communicated with an exhaust pipe (4), the top of the box (1) is provided with a solenoid valve (5), and the solenoid valve (5) is used for controlling waste oil into the box (1). A bottom cavity is formed in the bottom of the box (1), and the heating pipe (2) is located in the bottom cavity. The heating pipe (2) is in the form of a turbine and is located in the middle of the bottom of the box (1). Two first rotating shafts (6) are rotatably connected in the box (1), and the first rotating shafts (6) are located at two ends of the box (1) respectively, a plurality of first stirring blades (7) are fixedly connected to the first rotating shaft (6). Two gears (8) are rotatably connected to the outer side wall of the box (1), the two gears (8) are meshedly connected and fixedly connected to one end of the first rotating shaft (6) respectively. A separation tank (9) is fixedly connected to the top of the box (1), the bottom of the separation tank (9) is provided with an opening, a second rotating shaft (10) is arranged in the separation tank (9), the upper end of the second rotating shaft (10) is rotatably connected to the top of the separation tank (9), the lower end of the second rotating shaft (10) is rotatably connected to the top of the box (1), one end of the second rotating shaft (10) is provided with a driving assembly (11), the driving assembly (11) is used for driving the second rotating shaft (10) to rotate, a plurality of second stirring blades (12) are fixedly connected to the second rotating shaft (10), a plurality of magnetic adsorption plates (13) are fixedly connected in the separation tank (9), and the upper end of the box (1) is communicated with a feeding port (14). The magnetic adsorption plates (13) are distributed outside the second stirring blades (12). The driving assembly (11) comprises a third rotating shaft (111), the third rotating shaft (111) is located in the box (1) and the upper end of the third rotating shaft (111) is rotatably connected to the top of the box (1), the third rotating shaft (111) is located at one end of the box (1) close to the first air inlet pipe (3), a plurality of third stirring blades (112) are fixedly connected to the third rotating shaft (111), and the upper end of the third rotating shaft (111) and the lower end of the second rotating shaft (10) are driven by a belt and a belt pulley.

2. The electrostatic coater waste oil recycling device according to claim 1, characterized in that: A top cavity is formed in the top of the box (1), and the belt and the belt pulley are located in the top cavity.

3. The electrostatic coater waste oil recycling device according to claim 2, characterized in that: An impurity filtering tank (15) is arranged on one side of the box (1), one side of the lower end of the impurity filtering tank (15) is communicated with one side of the box (1), and the other side of the lower end of the impurity filtering tank (15) is communicated with a discharge pipe (16).

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