A lubricating oil base oil dewaxing apparatus

Abstract

This utility model discloses a dewaxing device for lubricating oil base oil, including a preheating tank, a primary cooling tank and a secondary cooling tank sequentially arranged at the rear end of the preheating tank, and a filter box arranged at the rear end of the secondary cooling tank; the upper end of the preheating tank is provided with an oil inlet and an additive inlet, and a heat exchange tube for heating the preheating tank is arranged around its outer wall; the primary and secondary cooling tanks are respectively provided with oil delivery pipes for conveying base oil, and a first coolant tank and a second coolant tank are respectively connected to the primary and secondary cooling tanks for cooling the base oil in the oil delivery pipes; the filter box is provided with a vibrating screen and a filter plate for filtering the cooled base oil, a vibrating motor is provided at the bottom of the vibrating screen, and an oil outlet pipe is provided at the bottom of the filter box; the device also includes a PLC controller. This utility model improves the dewaxing effect and realizes wax recovery.

Description

Technical Field

[0001] This utility model relates to the field of lubricating oil production technology, and more specifically to a lubricating oil base oil dewaxing device. Background Technology

[0002] In the lubricating oil production process, to ensure the lubricating oil maintains good fluidity at low temperatures, it is necessary to remove the wax that easily solidifies. This process is called dewaxing. Dewaxing not only lowers the pour point of the lubricating oil but also removes the wax, making it a crucial step in the refining process.

[0003] Traditional dewaxing devices mostly use room temperature dewaxing, which has problems such as high energy consumption, low dewaxing efficiency, and incomplete separation of wax crystals. Existing technologies use solvent dewaxing, but the equipment structure is complex and the solvent recovery cost is relatively high. Therefore, there is an urgent need for an improved device with a simple structure and good dewaxing effect. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a dewaxing device for lubricating oil base oil, so as to solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows.

[0006] A lubricating oil base oil dewaxing device includes a preheating tank for preheating the base oil, a primary cooling tank and a secondary cooling tank for cooling the base oil sequentially arranged at the rear end of the preheating tank, and a filter box for dewaxing the cooled base oil at the rear end of the secondary cooling tank. The upper end of the preheating tank has an oil inlet and an additive outlet, and the outer wall of the preheating tank is surrounded by heat exchange tubes for heating the preheating tank. The primary and secondary cooling tanks are respectively equipped with oil delivery pipes for conveying the base oil, and the primary and secondary cooling tanks are respectively connected to a first coolant tank and a second coolant tank for cooling the base oil in the oil delivery pipes. The filter box is equipped with a vibrating screen and a filter plate for filtering the cooled base oil, a vibrating motor is installed at the bottom of the vibrating screen, and an oil outlet pipe is installed at the bottom of the filter box. The device also includes a PLC controller, the output of which is connected to the input of the vibrating motor and the heater.

[0007] To further optimize the technical solution, the preheating tank is equipped with a stirring blade via a stirring shaft, and a stirring motor for driving the stirring shaft to rotate is installed above the preheating tank. The input end of the stirring motor is connected to the output end of the PLC controller.

[0008] To further optimize the technical solution, the inlet of the heat exchange tube is connected to the coolant outlet of the primary cooling tank via a water supply pipe, and the outlet of the heat exchange tube is connected to the first coolant tank. A pump is installed on the water supply pipe to deliver the hot water from the primary cooling tank into the heat exchange tube, and the input end of the pump is connected to the output end of the PLC controller.

[0009] To further optimize the technical solution, both the primary and secondary cooling tanks are equipped with stirring blades via stirring shafts to stir the cooling water in the primary and secondary cooling tanks. Above each of the primary and secondary cooling tanks, there is a stirring motor to drive the corresponding stirring blades to rotate. The input end of the stirring motor is connected to the output end of the PLC controller.

[0010] To further optimize the technical solution, both the primary and secondary cooling tanks are equipped with temperature sensors for collecting the temperature inside the cooling tanks, and the output of the temperature sensors is connected to the input of the PLC controller.

[0011] To further optimize the technical solution, pumps are installed on the oil pipelines connecting the preheating tank, the primary cooling tank, the secondary cooling tank, and the filter box, and the input end of the pumps is connected to the output end of the PLC controller.

[0012] To further optimize the technical solution, the filter box is equipped with a heater for heating the filtered wax. The upper end of the filter box is connected to a distillation tower for recovering the discharged wax vapor through an exhaust pipe. The input end of the heater is connected to the output end of the PLC controller.

[0013] To further optimize the technical solution, the bottom of the filter box is provided with a downwardly inclined guide plate.

[0014] To further optimize the technical solution, a one-way valve is installed on the oil supply pipe at the front end of the filter box to prevent wax vapor from entering the oil supply pipe. The input end of the one-way valve is connected to the output end of the PLC controller.

[0015] The technological advancements achieved by this utility model are as follows, due to the adoption of the above technical solutions.

[0016] This utility model provides a dewaxing device for lubricating oil base oil. By stirring and preheating the base oil and additives, the base oil and additives are mixed evenly and then cooled in a two-stage cooling tank before entering a filter box for filtration and dewaxing, which improves the dewaxing effect. The filtered wax is heated and then enters a distillation tower for reaction, realizing the recovery of wax. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] The components are: 1. Preheating tank, 2. Stirring shaft, 3. Stirring blade, 4. Stirring motor, 5. Oil inlet, 6. Additive inlet, 7. Primary cooling tank, 8. Secondary cooling tank, 9. Oil delivery pipe, 10. Pump, 11. First coolant tank, 12. Second coolant tank, 13. Water delivery pipe, 14. Heat exchanger tube, 15. Filter box, 16. Check valve, 17. Vibrating screen, 18. Filter plate, 19. Heater, 20. Guide plate, 21. Oil outlet pipe, 22. Distillation tower, 23. Temperature sensor. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] A lubricating oil base oil dewaxing device, combined with Figure 1 As shown, it includes a preheating tank 1, a primary cooling tank 7, a secondary cooling tank 8, a filter box 15, and a PLC controller arranged in sequence.

[0021] The preheating tank 1 is used to preheat the base oil. The upper end of the preheating tank 1 is provided with an oil inlet 5 and an additive inlet 6, which are used to add base oil and additives respectively. Inside the preheating tank 1, there is a stirring blade 3 through a stirring shaft 2. A stirring motor 4 is provided above the preheating tank 1 to drive the stirring shaft to rotate. The input end of the stirring motor is connected to the output end of the PLC controller. The stirring motor drives the stirring blade to rotate and stir the base oil and additives in the preheating tank, so that the base oil and additives are mixed evenly.

[0022] The outer wall of the preheating tank 1 is provided with heat exchange tubes 14 to heat the preheating tank and increase the temperature of the base oil and additives, so as to facilitate subsequent cooling and dewaxing.

[0023] The primary cooling tank 7 and the secondary cooling tank 8 are sequentially installed on the oil delivery pipe 9 at the bottom of the preheating tank 1. The oil delivery pipe 9 has a spiral structure inside the primary cooling tank 7 and the secondary cooling tank 8. The primary cooling tank 7 and the secondary cooling tank 8 are respectively connected to the first coolant tank 11 and the second coolant tank 12, which are used to store coolant to cool the base oil in the oil delivery pipe.

[0024] The coolant outlet at the bottom of the primary cooling tank 7 is connected to the inlet of the heat exchange tube 14 via a water supply pipe 13. The outlet of the heat exchange tube is connected to the first coolant tank 11. A pump 10 is installed on the water supply pipe to send the high-temperature cooling water after heat exchange in the primary cooling tank into the heat exchange tube to heat the base oil in the preheating tank, thus realizing the reuse of cooling water. The input end of the pump is connected to the output end of the PLC controller.

[0025] The coolant outlet at the bottom of the secondary cooling tank 8 is connected to the second coolant tank via a pipe, and the base oil in the secondary cooling tank is further cooled by the circulation of coolant.

[0026] Both the primary cooling tank 7 and the secondary cooling tank 8 are equipped with stirring blades via stirring shafts. Both primary cooling tank 7 and secondary cooling tank 8 are equipped with stirring motors 4 above them, which are used to stir the cooling water in primary cooling tank 7 and secondary cooling tank 8 respectively. The input end of the stirring motor is connected to the output end of the PLC controller, so that the heat exchange between the cooling water and the base oil in the oil pipeline is more uniform, thereby improving the cooling effect of the base oil.

[0027] Temperature sensors 23 are installed in both the primary cooling tank 7 and the secondary cooling tank 8 to collect temperature information inside the cooling tanks. The output of the temperature sensors is connected to the input of the PLC controller. The PLC controller controls the speed of base oil delivery based on the temperature information collected by the temperature sensors, thereby improving cooling efficiency while ensuring the cooling effect.

[0028] The filter box 15 is installed on the oil supply pipe at the rear end of the secondary cooling tank 8. It is used to dewax the cooled base oil. The filter box 15 is equipped with a vibrating screen 17 and a filter plate 18 to filter the cooled base oil and remove the wax from the base oil. A vibrating motor is installed at the bottom of the vibrating screen, and an oil outlet pipe 21 is installed at the bottom of the filter box. The input end of the vibrating motor is connected to the output end of the PLC controller. By setting up the vibrating screen, the wax of the base oil is initially filtered to avoid clogging the filter plate below.

[0029] The filter box is equipped with a heater 19 to heat the filtered wax. The filter box 15 has an exhaust port at the top, which is connected to a distillation tower 22 through an exhaust pipe to recover the discharged wax vapor. The input of the heater is connected to the output of the PLC controller.

[0030] The bottom of the filter box 15 is provided with a guide plate 20, which is inclined downward to guide the filtered base oil to the oil outlet and out through the oil outlet. A one-way valve 16 is provided on the oil supply pipe 9 at the front end of the filter box 15 to prevent wax vapor from entering the oil supply pipe. The input end of the one-way valve is connected to the output end of the PLC controller.

[0031] Pumps 10 are installed on the oil pipelines connecting the preheating tank 1, the primary cooling tank 7, the secondary cooling tank 8, and the filter box 15 to transport base oil. The input end of the pump is connected to the output end of the PLC controller.

[0032] In operation, the base oil and additives are added to the preheating tank for preheating and stirring. After preheating and stirring, the base oil enters the primary cooling tank for initial cooling, and then enters the secondary cooling tank for further cooling. The cooled base oil enters the filter box for filtration. The filtered base oil flows out from the oil outlet at the bottom. After all the base oil has flowed out, the heater heats the wax filtered out in the filter box. The wax is heated to form wax vapor, which is discharged from the exhaust port and enters the distillation tower for distillation through the exhaust pipe.

Claims

1. A dewaxing device for lubricating oil base oil, characterized in that: The system includes a preheating tank (1) for preheating base oil, a primary cooling tank (7) and a secondary cooling tank (8) for cooling base oil are sequentially arranged at the rear end of the preheating tank (1), and a filter box (15) for dewaxing the cooled base oil is arranged at the rear end of the secondary cooling tank (8); the upper end of the preheating tank (1) is provided with an oil inlet (5) and an additive inlet (6), and a heat exchange tube (14) for heating the preheating tank is arranged around the outer wall of the preheating tank (1); the primary cooling tank (7) and the secondary cooling tank (8) are respectively provided with a filter box for dewaxing the cooled base oil; The oil pipeline (9) for supplying base oil, the primary cooling tank (7) and the secondary cooling tank (8) are respectively connected to a first coolant tank (11) and a second coolant tank (12) for cooling the base oil in the oil pipeline; the filter box (15) is equipped with a vibrating screen (17) and a filter plate (18) for filtering the cooled base oil, a vibrating motor is installed at the bottom of the vibrating screen, and an oil outlet pipe (21) is installed at the bottom of the filter box; the device also includes a PLC controller, the output terminal of the PLC controller is connected to the input terminal of the vibrating motor and the heater respectively.

2. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: The preheating tank (1) is equipped with a stirring blade (3) through a stirring shaft (2), and a stirring motor (4) for driving the stirring shaft to rotate is provided above the preheating tank (1). The input end of the stirring motor is connected to the output end of the PLC controller.

3. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: The inlet of the heat exchange tube (14) is connected to the coolant outlet of the first-stage cooling tank via a water supply pipe (13), and the outlet of the heat exchange tube is connected to the first coolant tank (11). A pump (10) is installed on the water supply pipe to send the hot water in the first-stage cooling tank into the heat exchange tube. The input end of the pump is connected to the output end of the PLC controller.

4. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: Both the primary cooling tank (7) and the secondary cooling tank (8) are equipped with stirring blades through stirring shafts for stirring the cooling water in the primary cooling tank (7) and the secondary cooling tank (8). Both the primary cooling tank (7) and the secondary cooling tank (8) are equipped with stirring motors (4) for driving the corresponding stirring blades to rotate. The input end of the stirring motor is connected to the output end of the PLC controller.

5. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: Both the primary cooling tank (7) and the secondary cooling tank (8) are equipped with temperature sensors (23) for collecting the temperature inside the cooling tank, and the output of the temperature sensor is connected to the input of the PLC controller.

6. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: Pumps (10) are installed on the oil pipelines connecting the preheating tank (1), the primary cooling tank (7), the secondary cooling tank (8) and the filter box (15), respectively. The input end of the pump is connected to the output end of the PLC controller.

7. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: The filter box (15) is equipped with a heater (19) for heating the filtered wax. The upper end of the filter box (15) is connected to a distillation tower (22) for recovering the discharged wax vapor through an exhaust pipe. The input end of the heater is connected to the output end of the PLC controller.

8. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: The bottom of the filter box (15) is provided with a downwardly inclined guide plate (20).

9. The lubricating oil base oil dewaxing device according to claim 1, characterized in that: The oil supply pipe (9) at the front end of the filter box (15) is equipped with a one-way valve (16) to prevent wax vapor from entering the oil supply pipe. The input end of the one-way valve is connected to the output end of the PLC controller.

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