Solvent oil purification device

Abstract

The present invention relates to a solvent oil purification apparatus, and relates to the technical field of aluminum pigment production, the solvent oil purification apparatus comprises a distillation cylinder, and the distillation cylinder is sequentially sleeved with an annular first heat exchanger and an annular second heat exchanger from top to bottom; a high-temperature steam output pipe and a solvent oil input pipe for conveying to-be-purified solvent oil are arranged between the first heat exchanger and the distillation cylinder, and a channel for high-temperature steam to flow is arranged between the second heat exchanger and the first heat exchanger; a solvent oil collecting barrel is arranged on the side of the distillation cylinder, and an oil residue collecting barrel for collecting waste oil residues generated after distillation is arranged at the bottom of the distillation cylinder. According to the device, the distillation cylinder, the annular first heat exchanger and the annular second heat exchanger are arranged, and the integrated structural design can reduce the occupied area, so that the device is more compact, waste heat in high-temperature steam is effectively utilized to preheat normal-temperature solvent oil and cold water, the energy efficiency of the whole device is improved, and continuous purification of the solvent oil is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of aluminum pigment production, and in particular relates to a solvent oil purification device. Background Art

[0002] Solvent oil is used as a medium for the production of aluminum pigments and is generally recycled and reused. During the recycling process, the solvent oil becomes turbid, which directly affects the product quality. If the impurity content reaches 2%, it cannot be recycled and the production cost is high if it is directly scrapped.

[0003] The impurities in solvent oil are mainly oleic acid, unsaturated acid, suspended particulate matter or other additives. At present, the solvent oil is generally purified by distillation. Specifically, the solvent oil is pumped into a distillation pot, and the next pot is distilled and purified after one pot is distilled. The purpose of continuous purification cannot be achieved, and there are defects such as low purification efficiency and incomplete impurity separation. In addition, the existing purification device consumes a lot of energy, the thermal energy of the high-temperature gas after distillation cannot be effectively utilized, and the heat transfer effect between the solvent oil and the heat transfer component is not ideal.

[0004] To this end, we provide a solvent oil purification device to solve the above-mentioned problems. Summary of the invention

[0005] The purpose of the present invention is to provide a solvent oil purification device in view of the problems of the background technology.

[0006] The present invention achieves the above-mentioned purpose through the following technical solutions:

[0007] A solvent oil purification device comprises a distillation cylinder, wherein the outside of the distillation cylinder is sequentially sleeved with a first annular heat exchanger and a second annular heat exchanger from top to bottom, a high-temperature steam output pipe and a solvent oil input pipe for conveying the solvent oil to be purified are provided between the first heat exchanger and the distillation cylinder, and a channel for the flow of high-temperature steam is provided between the second heat exchanger and the first heat exchanger; a solvent oil collection barrel is provided on the side of the distillation cylinder, and an oil residue collection barrel for collecting waste oil residue produced after distillation is provided at the bottom of the distillation cylinder; the high-temperature steam distilled from the distillation cylinder is converted into a liquid state after heat exchange through the first heat exchanger and the second heat exchanger in sequence and is pumped into the solvent oil collection barrel, the first heat exchanger is used to preheat the solvent oil to be purified by high-temperature steam, and the second heat exchanger is used to collect the remaining heat energy of the high-temperature steam by cooling water.

[0008] As a further optimization scheme of the present invention, the first heat exchanger includes a first semicircular body and a second semicircular body spliced ​​with each other; one end of the first semicircular body is provided with a solvent oil feed pipe, and the solvent oil feed pipe is connected to an external tank body for storing solvent oil to be purified, the other end of the first semicircular body is connected to the second semicircular body, the second semicircular body is provided with a spiral heat exchange tube for the flow of solvent oil, and the other end of the second semicircular body is provided with a solvent oil discharge pipe connected to the solvent oil input pipe.

[0009] As a further optimization scheme of the present invention, a steam feed pipe connected to the high-temperature steam output pipe is provided on the top of the second semicircular body, and a steam discharge pipe inserted into the second heat exchanger is provided on the bottom of the second semicircular body.

[0010] As a further optimization scheme of the present invention, a hot water output pipe and a cold water input pipe are respectively provided on both sides of the second heat exchanger, and a solvent oil output pipe is also provided at the lower end of one side of the second heat exchanger, and a vacuum pump is provided on the solvent oil output pipe; a spiral heat exchange tube for cooling water flow is provided in the second heat exchanger.

[0011] As a further optimization scheme of the present invention, the first heat exchanger is also used to filter the solvent oil to be purified and the addition of auxiliary substances. A plurality of filter screens and a plurality of other substance adding components are sequentially arranged in the first semicircular body along the solvent oil transmission direction.

[0012] As a further optimization scheme of the present invention, the other substance adding component includes a storage barrel and a first motor located on one side of the storage barrel; a feed pipe inserted into the first semicircular body is provided at the bottom of the storage barrel, a feed delivery pipe is provided in the feed delivery pipe, and a first gear for driving the feed delivery auger to rotate is provided on the feed delivery pipe; an agitator and a circular plate are respectively provided on the output shaft of the first motor, and an arc-shaped gear ring for driving the first gear to rotate is detachably fixed on the edge of the circular plate.

[0013] As a further optimization scheme of the present invention, a plurality of heat transfer oil units for circulating heating are provided inside the distillation cylinder. The plurality of heat transfer oil units are arranged at equal intervals and are deflected in sequence along the circumferential direction. A driving mechanism is provided on the top of the distillation cylinder for driving the heat transfer oil units to rise and fall to adapt to changes in liquid level.

[0014] As a further optimization scheme of the present invention, the heat transfer oil unit includes a heat transfer oil inlet pipe and a heat transfer oil outlet pipe which pass through the top plate of the distillation cylinder; a louver-type pipe fitting is provided between the bottom ends of the heat transfer oil inlet pipe and the heat transfer oil outlet pipe, and the louver-type pipe fitting is surrounded by an annular plate, and the annular plate is provided with through holes for the heat transfer oil inlet pipe and the heat transfer oil outlet pipe to pass through.

[0015] As a further optimization scheme of the present invention, the driving mechanism includes a second motor, a second gear is fixedly provided on the output shaft of the second motor, a circular gear ring meshing with the second gear is provided on the side of the second gear, a third motor is fixedly provided on the top of the circular gear ring, and a third gear is fixedly provided on the output shaft of the third motor; the driving mechanism also includes a plurality of racks respectively fixedly provided on the side surfaces of the corresponding heat transfer oil inlet pipes, and the third gear is meshed with the rack to drive the rack to rise and fall.

[0016] As a further optimization scheme of the present invention, the top of the distillation cylinder is also provided with a vibration component for driving multiple heat transfer oil units to vibrate simultaneously; the vibration component includes a vibrator and a mounting plate located at the output end of the vibrator, and the mounting plate is provided with a plurality of transfer rods corresponding one by one to the heat transfer oil inlet pipe and the heat transfer oil outlet pipe; the heat transfer oil inlet pipe and the heat transfer oil outlet pipe are both magnetically attracted and provided with a magnetic guide sleeve, and a flexible mounting sleeve is provided outside the magnetic guide sleeve, and the flexible mounting sleeve is fixed to the top of the distillation cylinder.

[0017] The beneficial effects of the present invention are:

[0018] 1. The present invention provides a distillation cylinder, an annular first heat exchanger and a second heat exchanger. The integrated structural design can reduce the floor space, making the device more compact, and effectively utilizing the waste heat in the high-temperature steam to preheat the room-temperature solvent oil and cold water, thereby improving the energy efficiency of the entire device, preheating the solvent oil in advance, and reducing the energy consumption used for distillation.

[0019] 2. The present invention can add the required substances to the solvent oil by setting the first semicircular body, the second semicircular body, the filter screen and other substance adding components, which can effectively improve the preheating effect of the solvent oil and protect the distillation equipment. For example, the required substances can be set as corresponding nanoparticles. The addition of nanoparticles improves the subsequent heat transfer with high-temperature steam, making the heat exchange between the fluid and the heat exchange surface more sufficient.

[0020] 3. The present invention can completely separate impurities in solvent oil by setting up a heat transfer oil unit and adopting continuous distillation of heat transfer oil to achieve continuous purification. By setting up a driving mechanism, it can adapt to changes in the liquid level in the distillation cylinder. The adjustable position of the heat transfer oil unit ensures that it is always in the liquid, ensuring that each heat transfer oil unit can function and maintaining a certain distance between adjacent ones to better adapt to distillation needs under different liquid levels.

[0021] 4. The present invention can cause the heat transfer oil unit to produce slight fluctuations by setting a vibration component, thereby destroying the boundary layer of the solvent oil attached to the louver-shaped pipe fitting, strengthening the contact effect between the solvent oil and the heat transfer oil unit, and enhancing the heat transfer of the heat transfer oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1It is a schematic diagram of the process of the present invention;

[0023] Figure 2 It is a three-dimensional schematic diagram of the overall structure of the present invention;

[0024] Figure 3 is a schematic structural diagram of a first heat exchanger of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of other substance adding components of the present invention;

[0026] Figure 5 is a schematic structural diagram of a second heat exchanger of the present invention;

[0027] Figure 6 It is a schematic diagram of the internal structure of the distillation cylinder of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the heat transfer oil unit and the driving mechanism of the present invention;

[0029] Figure 8 It is a schematic diagram of assembling the vibration component of the present invention;

[0030] Fig. 9 It is a schematic diagram of the structure of the vibration component of the present invention.

[0031] In the figure:

[0032] 1. distillation cylinder; 101. solvent oil input pipe; 102. high-temperature steam output pipe; 2. first heat exchanger; 201. first semicircular body; 201a. solvent oil feed pipe; 202. second semicircular body; 202a. solvent oil discharge pipe; 202b. steam feed pipe; 202c. steam discharge pipe; 203. filter screen; 204. other material adding components; 204a. storage cylinder; 204b. feed pipe; 204c. first gear; 204d. stirrer; 204e. first motor; 204f. round plate; 204g. arc gear ring; 3. second heat exchanger; 301. hot water output pipe; 302. 02. Cold water input pipe; 303. Solvent oil output pipe; 304. Vacuum pump; 4. Solvent oil collection barrel; 5. Oil residue collection barrel; 6. Thermal oil unit; 601. Thermal oil input pipe; 602. Thermal oil output pipe; 603. Louver-type pipe fitting; 604. Ring plate; 605. Through hole; 606. Magnetic guide sleeve; 607. Flexible mounting sleeve; 7. Driving mechanism; 701. Second motor; 702. Second gear; 703. Circular gear ring; 704. Third motor; 705. Third gear; 706. Rack; 8. Vibration assembly; 801. Vibrator; 802. Mounting plate; 803. Transfer rod. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] Embodiment 1

[0035] In order to solve the problem that the existing purification devices generally cannot achieve the purpose of continuous purification, have high energy consumption, and the heat energy of the high-temperature steam after distillation cannot be fully utilized, please refer to Figure 1-Figure 2 The present invention provides a solvent oil purification device, comprising a distillation cylinder 1, the outside of the distillation cylinder 1 is sequentially sleeved with a first annular heat exchanger 2 and a second heat exchanger 3 from top to bottom, a high-temperature steam output pipe 102 and a solvent oil input pipe 101 for conveying the solvent oil to be purified are provided between the first heat exchanger 2 and the distillation cylinder 1, and a channel for high-temperature steam flow is provided between the second heat exchanger 3 and the first heat exchanger 2; a solvent oil collection barrel 4 is provided on the side of the distillation cylinder 1, and an oil residue collection barrel 5 for collecting waste oil residue generated after distillation is provided at the bottom of the distillation cylinder 1; the high-temperature steam distilled from the distillation cylinder 1 is converted into a liquid state after heat exchange by the first heat exchanger 2 and the second heat exchanger 3 in turn and is pumped into the solvent oil collection barrel 4, the first heat exchanger 2 is used to preheat the solvent oil to be purified by high-temperature steam, and the second heat exchanger 3 is used to collect the remaining heat energy of the high-temperature steam by cooling water.

[0036] like Figure 3 As shown, the first heat exchanger 2 includes a first semicircular body 201 and a second semicircular body 202 which are spliced ​​to each other; a solvent oil feed pipe 201a is provided at one end of the first semicircular body 201, and the solvent oil feed pipe 201a is connected to an external tank body for storing solvent oil to be purified, and the other end of the first semicircular body 201 is connected to the second semicircular body 202, and the second semicircular body 202 is provided with a spiral heat exchange pipe for the flow of solvent oil, and the other end of the second semicircular body 202 is provided with a solvent oil discharge pipe 202a connected to the solvent oil input pipe 101; a steam feed pipe 202b connected to the high-temperature steam output pipe 102 is provided at the top of the second semicircular body 202, and a steam discharge pipe 202c inserted into the second heat exchanger 3 is provided at the bottom of the second semicircular body 202.

[0037] like Figure 5 As shown, a hot water output pipe 301 and a cold water input pipe 302 are respectively provided on both sides of the second heat exchanger 3, and a solvent oil output pipe 303 is also provided at the lower end of one side of the second heat exchanger 3, and a vacuum pump 304 is provided on the solvent oil output pipe 303; a spiral heat exchange tube for cooling water flow is provided inside the second heat exchanger 3.

[0038] like Figure 6-Figure 7As shown, the interior of the distillation cylinder 1 is provided with a plurality of heat transfer oil units 6 for circulating heating. The plurality of heat transfer oil units 6 are arranged at equal intervals and deflected in sequence along the circumferential direction. The top of the distillation cylinder 1 is provided with a driving mechanism 7 for driving the heat transfer oil units 6 to rise and fall to adapt to the change of the liquid level. A liquid level sensor is provided inside the distillation cylinder 1. The arrangement of a plurality of heat transfer oil units 6 with different arrangement directions can further improve the contact effect between the solvent oil and the heat transfer oil unit 6, make the heating more uniform, and improve the heat transfer efficiency. The heat transfer oil circulation heating is adopted, which is different from the traditional direct electric heating distillation cylinder 1. After the heat transfer oil reaches the set temperature through electric heating in the heat transfer oil tank, the heated heat transfer oil is transported to the heat transfer oil unit 6 through a pump to provide heat energy for distillation and purification, and then returned to the heat transfer oil tank. This design improves the service life of the heating device.

[0039] The heat transfer oil unit 6 includes a heat transfer oil inlet pipe 601 and a heat transfer oil outlet pipe 602 which pass through the top plate of the distillation cylinder 1; a louver-type pipe fitting 603 is provided between the bottom ends of the heat transfer oil inlet pipe 601 and the heat transfer oil outlet pipe 602, and the louver-type pipe fitting 603 is surrounded by an annular plate 604, and the annular plate 604 is provided with a through hole 605 for the heat transfer oil inlet pipe 601 and the heat transfer oil outlet pipe 602 to pass through.

[0040] The driving mechanism 7 includes a second motor 701, a second gear 702 is fixedly provided on the output shaft of the second motor 701, a circular gear ring 703 meshing with the second gear 702 is provided on the side of the second gear 702, a third motor 704 is fixedly provided on the top of the circular gear ring 703, and a third gear 705 is fixedly provided on the output shaft of the third motor 704; the driving mechanism 7 also includes a plurality of racks 706 respectively fixedly provided on the side surfaces of the corresponding heat transfer oil inlet pipes 601, and the third gear 705 meshes with the rack 706 to drive the rack 706 to rise and fall.

[0041] When the position of the heat transfer oil unit 6 needs to be adjusted, the second motor 701 drives the second gear 702 to rotate, the second gear 702 drives the circular gear ring 703 to rotate, the circular gear ring 703 drives the third motor 704 to rotate to the heat transfer oil unit 6 that needs to be adjusted, and then the third motor 704 is started, the third motor 704 drives the third gear 705 to rotate, the third gear 705 drives the rack 706 to move, and the rack 706 drives the entire heat transfer oil unit 6 to rise and fall; the adjustable position performance of the heat transfer oil unit 6 ensures that it is always in the liquid, ensures that each heat transfer oil unit 6 can play a role, and maintains a certain distance between adjacent ones, so as to better adapt to the distillation requirements under different liquid levels.

[0042] During purification, the solvent oil in the distillation cylinder 1 is heated by the heat transfer oil unit 6 to generate high-temperature steam, which enters the first heat exchanger 2 through the high-temperature steam output pipe 102, and then the solvent oil to be purified enters the first heat exchanger 2 through the solvent oil feed pipe 201a, and heat exchange occurs between the high-temperature steam and the solvent oil to be purified, and the heated solvent oil to be purified enters the distillation cylinder 1 through the solvent oil discharge pipe 202a and the solvent oil input pipe 101; the high-temperature steam then enters the second heat exchanger 3 through the steam discharge pipe 202c, and cooling water enters the second heat exchanger 3 through the cold water input pipe 302, and heat exchange occurs between the high-temperature steam and the cooling water. The heated cooling water is discharged through the hot water output pipe 301, and the high-temperature steam becomes liquid and enters the solvent oil collection barrel 4 under the action of the vacuum pump 304, and is transported to the corresponding solvent oil tank in the production workshop for continued use. The waste oil residue generated after distillation in the distillation cylinder 1 is discharged into the oil residue collection barrel 5 and treated according to environmental protection requirements.

[0043] Embodiment 2

[0044] On the basis of Example 1, in order to improve the preheating effect of solvent oil and protect the distillation equipment, such as Figure 3-Figure 4 As shown, the first heat exchanger 2 is also used for filtering the solvent oil to be purified and adding auxiliary substances. A plurality of filter screens 203 and a plurality of other substance adding components 204 are sequentially arranged in the first semicircular body 201 along the solvent oil transmission direction.

[0045] The other material adding components 204 include a storage barrel 204a and a first motor 204e located on one side of the storage barrel 204a; a feeding pipe 204b inserted into the first semicircular body 201 is provided at the bottom of the storage barrel 204a, a feeding auger is provided in the feeding pipe 204b, and a first gear 204c for driving the feeding auger to rotate is provided on the feeding auger; an agitator 204d and a circular plate 204f are respectively provided on the output shaft of the first motor 204e, and an arc-shaped gear ring 204g for driving the first gear 204c to rotate is detachably fixed on the edge of the circular plate 204f, and the amount of material added can be controlled by installing a suitable number of arc-shaped gear rings 204g.

[0046] When in use, the first motor 204e drives the agitator 204d and the arc gear ring 204g to rotate, the arc gear ring 204g drives the first gear 204c to rotate, and the first gear 204c drives the unloading auger to rotate, and the material in the storage barrel 204a is added to the solvent oil in the first semicircular body 201, and mixed by the agitator 204d.

[0047] Other substances are set as antioxidants, corrosion inhibitors, boiling agents, etc. Antioxidants can prevent or slow down the oxidation reaction of solvent oil and protect the quality of solvent oil. Corrosion inhibitors can prevent or slow down the contact between corrosive media and distillation cylinder 1, thereby protecting the equipment and extending the service life of the equipment. Boiling agents can help solvent oil form a uniform boiling state during the distillation process to prevent the occurrence of violent boiling. Specifically, the boiling agent can be set as zeolite nanoparticles. The addition of nanoparticles can also improve the subsequent heat transfer with high-temperature steam. Since nano-scale zeolite particles have a large specific surface area and thermal conductivity, adding them to solvent oil can improve the overall thermal conductivity of the mixed system, so that the solvent oil can absorb heat more efficiently, thereby improving the heat exchange effect. When the solvent oil flows in the heat exchange tube, the presence of nanoparticles will destroy the boundary layer of the fluid, increase the turbulence of the fluid, and make the heat exchange between the fluid and the heat exchange surface more sufficient.

[0048] Embodiment 3

[0049] On the basis of the first and second embodiments, in order to further improve the heat transfer effect of the heat transfer oil unit 6, as shown in FIG. Figure 8-Figure 9 As shown, a vibration assembly 8 for driving a plurality of thermal oil units 6 to vibrate simultaneously is also provided on the top of the distillation cylinder 1 .

[0050] The vibration assembly 8 includes a vibrator 801 and a mounting plate 802 located at the output end of the vibrator 801. The mounting plate 802 is provided with a plurality of transmission rods 803 corresponding to the heat transfer oil input pipe 601 and the heat transfer oil output pipe 602. The heat transfer oil input pipe 601 and the heat transfer oil output pipe 602 are both provided with a magnetic guide sleeve 606. The magnetic guide sleeve 606 is provided with a flexible mounting sleeve 607 outside the fixed sleeve. The flexible mounting sleeve 607 is fixed on the top of the distillation cylinder 1 to facilitate the vibration of the heat transfer oil input pipe 601 and the heat transfer oil output pipe 602. The vibrator 801 uses an ultrasonic generator, a vibration motor or other vibration sources.

[0051] When in use, the vibrator 801 drives the mounting plate 802 to vibrate, the mounting plate 802 drives the multiple transfer rods 803 to vibrate, the transfer rods 803 drive the corresponding heat transfer oil input pipe 601 and the heat transfer oil output pipe 602 to vibrate, the heat transfer oil input pipe 601 and the heat transfer oil output pipe 602 drive the louver type pipe fitting 603 to vibrate, thereby destroying the boundary layer of the solvent oil attached to the louver type pipe fitting 603, strengthening the contact effect between the solvent oil and the heat transfer oil unit 6, and enhancing the heat transfer of the heat transfer oil; the vibration frequency and amplitude can be adjusted according to the needs of different stages in the distillation process. For example, in the early stage of distillation, the vibration frequency is increased to quickly increase the temperature. When approaching the target boiling point, the amplitude is reduced to avoid excessive disturbance affecting the separation effect.

[0052] The above-mentioned embodiment only expresses one implementation mode of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A solvent oil purification device, comprising a distillation cylinder (1), characterized in that: The outside of the distillation cylinder (1) is provided with an annular first heat exchanger (2) and a second heat exchanger (3) in sequence from top to bottom; a high-temperature steam output pipe (102) and a solvent oil input pipe (101) for conveying solvent oil to be purified are provided between the first heat exchanger (2) and the distillation cylinder (1); and a channel for high-temperature steam to flow is provided between the second heat exchanger (3) and the first heat exchanger (2); A solvent oil collecting barrel (4) is provided on the side of the distillation barrel (1), and an oil residue collecting barrel (5) for collecting waste oil residue generated after distillation is provided at the bottom of the distillation barrel (1); The high-temperature steam distilled from the distillation cylinder (1) is converted into a liquid state after being heat exchanged in the first heat exchanger (2) and the second heat exchanger (3) in sequence and is pumped into the solvent oil collection barrel (4). The first heat exchanger (2) is used to preheat the solvent oil to be purified by the high-temperature steam, and the second heat exchanger (3) is used to collect the remaining heat energy of the high-temperature steam by cooling water.

2. A solvent oil purification device according to claim 1, characterized in that: The first heat exchanger (2) comprises a first semicircular body (201) and a second semicircular body (202) which are spliced ​​to each other; One end of the first semicircular body (201) is provided with a solvent oil feed pipe (201a), and the solvent oil feed pipe (201a) is connected to an external tank body for storing the solvent oil to be purified. The other end of the first semicircular body (201) is connected to the second semicircular body (202), and the second semicircular body (202) is provided with a spiral heat exchange pipe for the flow of solvent oil. The other end of the second semicircular body (202) is provided with a solvent oil discharge pipe (202a) connected to the solvent oil input pipe (101).

3. A solvent oil purification device according to claim 2, characterized in that: A steam feed pipe (202b) connected to the high-temperature steam output pipe (102) is provided at the top of the second semicircular body (202), and a steam discharge pipe (202c) inserted into the second heat exchanger (3) is provided at the bottom of the second semicircular body (202).

4. A solvent oil purification device according to claim 1, characterized in that: A hot water output pipe (301) and a cold water input pipe (302) are respectively provided on both sides of the second heat exchanger (3); a solvent oil output pipe (303) is also provided at the lower end of one side of the second heat exchanger (3); and a vacuum pump (304) is provided on the solvent oil output pipe (303); The second heat exchanger (3) is provided with a spiral heat exchange tube for the flow of cooling water.

5. A solvent oil purification device according to claim 2, characterized in that: The first heat exchanger (2) is also used for filtering the solvent oil to be purified and for adding auxiliary substances. A plurality of filter screens (203) and a plurality of other substance adding components (204) are sequentially arranged in the first semicircular body (201) along the solvent oil transmission direction.

6. A solvent oil purification device according to claim 5, characterized in that: The other substance adding component (204) comprises a material storage barrel (204a) and a first motor (204e) located at one side of the material storage barrel (204a); The bottom of the material storage barrel (204a) is provided with a material delivery pipe (204b) inserted into the first semicircular body (201), a material discharge auger is provided in the material delivery pipe (204b), and a first gear (204c) for driving the material discharge auger to rotate is provided on the material discharge auger; The output shaft of the first motor (204e) is provided with a stirrer (204d) and a circular plate (204f), respectively; an arc-shaped gear ring (204g) for driving the first gear (204c) to rotate is detachably fixed on the edge of the circular plate (204f).

7. A solvent oil purification device according to claim 1, characterized in that: A plurality of heat transfer oil units (6) for circulating heating are arranged inside the distillation cylinder (1); the plurality of heat transfer oil units (6) are arranged at equal intervals and are deflected in sequence along the circumferential direction; a driving mechanism (7) for driving the heat transfer oil units (6) to rise and fall to adapt to changes in liquid level is provided at the top of the distillation cylinder (1).

8. A solvent oil purification device according to claim 7, characterized in that: The heat transfer oil unit (6) comprises a heat transfer oil input pipe (601) and a heat transfer oil output pipe (602) which are arranged on the top plate of the distillation cylinder (1); A louver-shaped pipe fitting (603) is provided between the bottom ends of the heat-conducting oil input pipe (601) and the heat-conducting oil output pipe (602); the louver-shaped pipe fitting (603) is surrounded by an annular plate (604); and the annular plate (604) is provided with a through hole (605) for the heat-conducting oil input pipe (601) and the heat-conducting oil output pipe (602) to pass through.

9. A solvent oil purification device according to claim 8, characterized in that: The driving mechanism (7) comprises a second motor (701), a second gear (702) is fixedly provided on the output shaft of the second motor (701), a circular gear ring (703) meshing with the second gear (702) is provided on the side of the second gear (702), a third motor (704) is fixedly provided on the top of the circular gear ring (703), and a third gear (705) is fixedly provided on the output shaft of the third motor (704); The driving mechanism (7) further comprises a plurality of racks (706) respectively fixed on the side surfaces of the corresponding heat transfer oil input pipes (601), and the third gear (705) is meshed with the racks (706) to drive the racks (706) to rise and fall.

10. A solvent oil purification device according to claim 8, characterized in that: The top of the distillation cylinder (1) is also provided with a vibration component (8) for driving a plurality of heat transfer oil units (6) to vibrate simultaneously; The vibration assembly (8) comprises a vibrator (801) and a mounting plate (802) located at the output end of the vibrator (801), wherein the mounting plate (802) is provided with a plurality of transmission rods (803) corresponding one-to-one to the heat transfer oil input pipe (601) and the heat transfer oil output pipe (602); The heat transfer oil input pipe (601) and the heat transfer oil output pipe (602) are both provided with a magnetic guide sleeve (606) by magnetic attraction, and a flexible installation sleeve (607) is provided outside the magnetic guide sleeve (606), and the flexible installation sleeve (607) is fixed on the top of the distillation cylinder (1).

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