Waste oil metal impurity centrifugal separator

Abstract

The application relates to the technical field of centrifugal separators, and discloses a waste oil metal impurity centrifugal separator, which comprises a centrifugal separator shell and a separation cylinder assembly. The waste oil metal impurity centrifugal separator adopts a double-cone gradient separation structure formed by combining an outer conical cylinder and an inner conical cylinder, realizes gradient separation by utilizing the rheological characteristics of oil, improves the separation efficiency, and improves the metal interception rate by designing the aperture difference between the first through hole and the second through hole. Then, the piezoelectric ceramic vibrator installed at the bottom of the inner conical cylinder can destroy the oil boundary layer through resonance waves to prevent micro metal adhesion, solves the "wall sticking effect" of metal particles in the traditional centrifugal separator, and combines the guiding positioning of the guide groove and the guide column and the quick release function of the quick release assembly to shorten the maintenance time and facilitate the regular cleaning of the separation cylinder assembly. Ultimately, the core advantages of improved separation efficiency, reduced energy consumption and a larger applicable oil viscosity range are achieved, and the problems in the background art are solved.

Description

Technical Field

[0001] This application relates to the field of centrifugal separator technology, specifically a centrifugal separator for waste oil and metal impurities. Background Technology

[0002] With the development of the catering and food processing industries, the amount of waste oil generated is increasing daily. Waste oil mainly comes from frying oil in the catering industry, waste oil in food processing plants, and by-products generated during meat processing and oil refining. If this waste oil is not properly treated, it will not only waste resources but also cause serious environmental pollution.

[0003] Centrifugal separation technology utilizes the density difference between metallic impurities and greases to separate the metallic impurities from the greases under centrifugal force. Compared with other separation methods, centrifugal separation technology has advantages such as high separation efficiency, large processing capacity, and the ability to remove multiple metallic impurities simultaneously, making it more suitable for separating metallic impurities from waste greases.

[0004] However, existing centrifugal separation equipment still has some shortcomings in processing waste oil, such as the separation effect is not ideal. In order to achieve targeted separation and treatment of waste oil, a waste oil metal impurity centrifugal separator has been proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this application provides a waste oil and metal impurity centrifugal separator that adopts a double-cone inclination angle difference design and utilizes the rheological properties of oil to achieve gradient separation, thereby improving separation efficiency and solving the problems mentioned in the background technology.

[0006] To achieve the above objectives, this application provides the following technical solution: a waste oil and metal impurity centrifugal separator, comprising a centrifugal separator shell and a separation cylinder assembly. The separation cylinder assembly includes an outer cone cylinder rotatably fitted inside the bottom of the centrifugal separator shell, the outer cone cylinder having an inclination angle of 15 degrees. A servo motor is fixedly connected to the bottom surface of the centrifugal separator shell, the output shaft end of the servo motor is fixedly connected to the rotating shaft end of the outer cone cylinder. The inner wall of the outer cone cylinder has uniformly distributed first through holes. An inner cone cylinder is installed inside the outer cone cylinder, the inner cone cylinder having an inclination angle of 30 degrees. The inner wall of the inner cone cylinder has uniformly distributed second through holes, the inner diameter of the second through holes being larger than the inner diameter of the first through holes. A piezoelectric ceramic vibrator is installed on the bottom surface of the inner cone cylinder, the piezoelectric ceramic vibrator being located between the outer cone cylinder and the inner cone cylinder. A quick-release assembly is provided between the outer cone cylinder and the inner cone cylinder.

[0007] The above scheme uses an outer cone and an inner cone to form a double-cone gradient separation structure. Gradient separation is achieved by utilizing the rheological properties of grease, thereby improving separation efficiency. The difference in aperture between the first and second through holes increases the metal rejection rate. Then, the piezoelectric ceramic vibrator installed at the bottom of the inner cone can destroy the grease boundary layer through resonant waves, preventing the adhesion of micro-metals and solving the "wall-adhering effect" of metal particles in traditional centrifuges. Combined with the quick-release function of the quick-release component, the maintenance time is shortened, and it is convenient to clean the separation cylinder assembly regularly. Ultimately, the core advantages of improved separation efficiency, reduced energy consumption, and a wider applicable grease viscosity range are achieved.

[0008] Furthermore, the upper surface of the outer cone is provided with four guide grooves, and the top of the inner cone is fixedly connected with four guide posts, the guide grooves being adapted to the guide posts.

[0009] The above scheme allows the guide groove and guide post to work together to achieve initial positioning between the outer cone and the inner cone, making it easier to lock the inner cone inside the outer cone later.

[0010] Furthermore, the quick-release assembly includes four positioning seats fixedly connected to the upper surface of the inner cone, each positioning seat having a positioning bolt threaded onto its inner wall, and each positioning bolt having a positioning baffle fixedly connected to its top.

[0011] With the above solution, when the positioning baffle rotates, it will drive the positioning bolt to rotate, which makes it convenient to limit the movement of other components.

[0012] Furthermore, four positioning plates are hinged to the upper surface of the outer cone, and each positioning plate has a preset groove on its inner wall. The positioning bolts and positioning baffles are adapted to the preset grooves.

[0013] With the above scheme, the positioning plate can be fitted onto the positioning bolt and positioning baffle through the preset groove. Then, by turning the positioning baffle, the positioning baffle can limit the positioning plate on the positioning seat, thus completing the quick installation between the outer cone and the inner cone. The quick-release function between the outer cone and the inner cone facilitates the regular cleaning of the space between the outer cone and the inner cone, which is beneficial to the repeated use of the device.

[0014] Furthermore, the top of the centrifuge housing is threadedly connected to a top cover, an oil injection pipe is installed inside the top cover, and a sealing ring is fixedly connected to the edge of the bottom surface of the top cover.

[0015] The above solution uses a threaded connection between the centrifuge housing and the top cover, which simplifies the opening and closing of the centrifuge housing and the top cover. The oil injection pipe allows waste grease to be easily injected into the interior of the centrifuge housing. In addition, the sealing ring ensures the sealing effect at the connection between the centrifuge housing and the top cover, reducing the chance of leakage at the connection.

[0016] Furthermore, four support columns are fixedly connected to the bottom surface of the centrifuge shell, and a mounting base is fixedly connected to the bottom end of each support column.

[0017] The above solution, with the support column and mounting base working together, can position the device in a suitable location, thereby reducing the impact of shaking on the device and optimizing the separation effect of waste oil and metal impurities.

[0018] Furthermore, the bottom of the centrifuge casing is connected to two symmetrical drain pipes, and each drain pipe section is equipped with a solenoid valve.

[0019] The above solution allows the drain pipe and solenoid valve to work together to discharge the grease separated by centrifugation to the outside of the centrifuge casing, making operation convenient.

[0020] Furthermore, an external connector is installed on the outer surface of the centrifuge housing, and the output end of the external connector is connected to a nozzle. The nozzle is located inside the centrifuge housing, and a controller is fixedly connected to the outer surface of the centrifuge housing.

[0021] With the above solution, the external connector can introduce external water into the interior of the centrifuge shell, and spray the water around the separation cylinder assembly through the nozzle, which facilitates the subsequent cleaning of the separation cylinder assembly. The controller can be set up to easily control the operation of the electrical components in the device.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects: This waste oil and metal impurity centrifuge employs a double-cone gradient separation structure formed by the combination of an outer and inner cone. It utilizes the rheological properties of oil to achieve gradient separation, improving separation efficiency. The difference in aperture between the first and second through holes further enhances the metal retention rate. Then, a piezoelectric ceramic vibrator installed at the bottom of the inner cone disrupts the oil boundary layer through resonant waves, preventing micro-metal adhesion and solving the "wall-adhering effect" of metal particles in traditional centrifuges. Combined with the guiding and positioning of the guide groove and guide column, and the quick-release function of the quick-release assembly, maintenance time is shortened, facilitating regular cleaning of the separation cylinder assembly. Ultimately, it achieves the core advantages of improved separation efficiency, reduced energy consumption, and a wider applicable oil viscosity range, solving the problems raised in the background technology. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall front view of the structure of this application; Figure 2 This is a schematic diagram of the overall bottom view of the structure of this application; Figure 3 This is a partial top view of the structure of this application; Figure 4 For the structure of this application Figure 3 Enlarged schematic diagram of the structure at point A in the middle; Figure 5 This is a partial cross-sectional structural diagram of the structure of this application; Figure 6 This is a schematic diagram of a partial exploded structure of the present application.

[0024] In the picture: 1. Centrifuge housing; 2. Servo motor; 3. Separation cylinder assembly; 301. Outer cone; 302. First through hole; 303. Inner cone; 304. Second through hole; 305. Piezoelectric ceramic vibrator; 306. Guide groove; 307. Guide column; 4. Quick release assembly; 401. Positioning seat; 402. Positioning bolt; 403. Positioning baffle; 404. Positioning plate; 405. Preset groove; 5. Top cover; 6. Oil injection pipe; 7. Sealing ring; 8. Support column; 9. Mounting base; 10. Drain pipe; 11. Solenoid valve; 12. Controller; 13. External connector; 14. Nozzle. Detailed Implementation

[0025] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0026] Please see Figure 3 , Figure 5 and Figure 6The waste oil and metal impurity centrifuge in this embodiment includes a centrifuge shell 1 and a separation cylinder assembly 3. The separation cylinder assembly 3 includes an outer cone 301 rotatably fitted inside the bottom of the centrifuge shell 1. The outer cone 301 has an inclination angle of 15 degrees and a ceramic coating on its surface. A servo motor 2 is fixedly connected to the bottom surface of the centrifuge shell 1. The output shaft of the servo motor 2 is fixedly connected to the rotating shaft of the outer cone 301. The inner wall of the outer cone 301 has evenly distributed first through holes 302. An inner cone 303 is installed inside the outer cone 301. The inclination angle of the inner cone 303 is 30 degrees. The inner cone 303 is preferably made of stainless steel. The inner wall of the inner cone 303 has evenly distributed second through holes 304. The inner diameter of 4 is greater than the inner diameter of the first through hole 302. A piezoelectric ceramic vibrator 305 is installed on the bottom surface of the inner cone 303. The piezoelectric ceramic vibrator 305 is located between the outer cone 301 and the inner cone 303. The piezoelectric ceramic vibrator 305 can generate high-frequency vibration, destroy the grease boundary layer, prevent the adhesion of micro-metals, and further improve the separation efficiency and effect of metal impurities. Four guide grooves 306 are opened on the upper surface of the outer cone 301. Four guide posts 307 are fixedly connected to the top of the inner cone 303. The guide grooves 306 and the guide posts 307 are adapted to each other. The cooperation between the guide grooves 306 and the guide posts 307 can achieve the effect of initial positioning between the outer cone 301 and the inner cone 303, which facilitates the subsequent locking of the inner cone 303 inside the outer cone 301.

[0027] It should be noted that the aperture of the second through hole 304 is preferably 1.5 mm, which can pre-separate metal particles >100 μm, and the aperture of the first through hole 302 is preferably 0.3 mm, which can capture micro metals of 10-100 μm. The reason why metal impurities cannot be thrown out from the separation cylinder assembly 3 is that the normal component of the centrifugal force on the 30-degree inclined plane presses the particles against the wall, and the tangential component is completely canceled out by the friction force.

[0028] Please see Figure 3 , Figure 4 and Figure 6A quick-release assembly 4 is provided between the outer cone 301 and the inner cone 303. The quick-release assembly 4 includes four positioning seats 401 fixedly connected to the upper surface of the inner cone 303. Each positioning seat 401 has a positioning bolt 402 threadedly connected to its inner wall. Each positioning bolt 402 has a positioning baffle 403 fixedly connected to its top. When the positioning baffle 403 rotates, it will drive the positioning bolt 402 to rotate, which can facilitate the limiting of other components. Four positioning plates 404 are hinged to the upper surface of the outer cone 301. Each positioning plate 404 has a preset groove 405 on its inner wall. Both the positioning bolt 402 and the positioning baffle 403 are adapted to the preset groove 405. The positioning plate 404 can be fitted onto the positioning bolt 402 and the positioning baffle 403 through the preset groove 405. Then, by tightening the positioning baffle 403, the positioning plate 404 can be limited to the positioning seat 401, thus completing the quick installation between the outer cone 301 and the inner cone 303. The quick-release function between the outer cone 301 and the inner cone 303 facilitates the periodic cleaning of the space between the outer cone 301 and the inner cone 303, which is beneficial for the repeated use of the device. Please see Figure 1 , Figure 2 and Figure 3 The centrifuge housing 1 has a top cover 5 threadedly connected to its top. An oil injection pipe 6 is installed inside the top cover 5. A sealing ring 7 is fixedly connected to the edge of the bottom surface of the top cover 5. The centrifuge housing 1 and the top cover 5 are connected by threads, which simplifies the opening and closing of the centrifuge housing 1 and the top cover 5. The oil injection pipe 6 can easily inject waste oil into the interior of the centrifuge housing 1. In addition, the sealing ring 7 can ensure the sealing effect at the connection between the centrifuge housing 1 and the top cover 5, reducing the chance of leakage at the connection. Four support columns 8 are fixedly connected to the bottom surface of the centrifuge housing 1. Each support column 8 has a mounting base 9 fixedly connected to its bottom end. The support columns 8 and the mounting base 9 cooperate with each other to position the device in a suitable position, thereby reducing the impact of shaking on the device and optimizing the separation effect of waste oil and metal impurities.

[0029] Please see Figure 1 , Figure 2 and Figure 3The bottom of the centrifuge housing 1 is connected to two symmetrical drain pipes 10. Each drain pipe 10 is equipped with a solenoid valve 11. The drain pipes 10 and solenoid valves 11 work together to discharge the centrifuged grease to the outside of the centrifuge housing 1, facilitating operation. An external connector 13 is installed on the outer surface of the centrifuge housing 1. The output end of the external connector 13 is connected to a nozzle 14, which is located inside the centrifuge housing 1. A controller 12 is fixedly connected to the outer surface of the centrifuge housing 1. The external connector 13 allows external water to be introduced into the centrifuge housing 1, and the water is sprayed out around the separation cylinder assembly 3 through the nozzle 14, facilitating subsequent cleaning of the separation cylinder assembly 3. The controller 12 can conveniently control the operation of the electrical components in the device.

[0030] In this embodiment, the waste oil and metal impurity centrifuge adopts a double-cone gradient separation structure formed by the combination of an outer cone 301 and an inner cone 303. Gradient separation is achieved by utilizing the rheological properties of oil, thereby improving separation efficiency. The design of the aperture difference between the first through hole 302 and the second through hole 304 increases the metal retention rate. Then, the piezoelectric ceramic vibrator 305 installed at the bottom of the inner cone 303 can destroy the oil boundary layer through resonant waves, preventing the adhesion of micro-metals and solving the "wall-adhering effect" of metal particles in traditional centrifuges. Combined with the guiding and positioning of the guide groove 306 and the guide column 307 and the quick-release function of the quick-release component 4, the maintenance time is shortened, and the work of cleaning the separation cylinder component 3 can be carried out regularly. The external cleaning structure composed of the external connector 13 and the nozzle 14 can optimize the cleaning quality. The sealing ring 7 ensures the sealing performance, and the controller 12 realizes intelligent control. Ultimately, the core advantages of improved separation efficiency, reduced energy consumption, and a wider applicable oil viscosity range are achieved.

[0031] The working principle of the above embodiment is as follows: Waste grease containing metal impurities is put into the inner cone 303. The servo motor 2 drives the outer cone 301 to rotate at high speed, forming a centrifugal force field. The grease first enters the inner cone 303 with a 30-degree inclination angle. Large metal particles adhere tightly to the cone wall under the action of centrifugal force, forming a dynamic filter bed. The semi-purified grease, which has been preliminarily filtered by the second through hole 304, flows into the gap of the outer cone 301 with a 15-degree inclination angle. Micro-metal particles are captured a second time by the first through hole 302 under the laminar flow effect. The piezoelectric ceramic oscillator 305 located at the bottom of the inner cone 303 vibrates at a certain frequency, breaking the metal particles. A particle boundary layer prevents pore blockage. The separated clean oil is discharged through drain pipe 10, while the retained metal impurities can be easily removed and cleaned from the inner cone 303 via the quick-release assembly 4 after shutdown. Disassembly simply requires loosening the four positioning bolts 402 to release the limiting effect on the four positioning plates 404, thus completing the separation between the outer cone 301 and the inner cone 303. After shutdown, the external connector 13 and nozzle 14 work together to spray cleaning fluid, facilitating the cleaning of the components inside the centrifuge casing 1. The cleaning waste fluid is discharged through drain pipe 10. This integrated design achieves efficient separation of metal impurities and long-term stable operation of the equipment through the triple synergy of mechanical screening, vibration anti-clogging, and quick-disassembly maintenance.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

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

Claims

1. A centrifugal separator for waste oil and metal impurities, comprising a centrifugal separator shell (1) and a separation cylinder assembly (3), characterized in that: The separation cylinder assembly (3) includes an outer cone cylinder (301) rotatably fitted inside the bottom of the centrifugal separator housing (1). The inclination angle of the outer cone cylinder (301) is 15 degrees. A servo motor (2) is fixedly connected to the bottom surface of the centrifugal separator housing (1). The output shaft end of the servo motor (2) is fixedly connected to the rotating shaft end of the outer cone cylinder (301). The inner wall of the outer cone cylinder (301) is provided with uniformly distributed first through holes (302). An inner cone cylinder (303) is installed inside the outer cone cylinder (301). The inner cone (303) has an inclination angle of 30 degrees. The inner wall of the inner cone (303) is provided with uniformly distributed second through holes (304). The inner diameter of the second through hole (304) is greater than the inner diameter of the first through hole (302). A piezoelectric ceramic vibrator (305) is installed on the bottom surface of the inner cone (303). The piezoelectric ceramic vibrator (305) is located between the outer cone (301) and the inner cone (303). A quick-release assembly (4) is provided between the outer cone (301) and the inner cone (303).

2. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: The upper surface of the outer cone (301) is provided with four guide grooves (306), and the top of the inner cone (303) is fixedly connected with four guide posts (307). The guide grooves (306) are adapted to the guide posts (307).

3. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: The quick-release assembly (4) includes four positioning seats (401) fixedly connected to the upper surface of the inner cone (303). Each positioning seat (401) has a positioning bolt (402) threadedly connected to its inner wall, and a positioning baffle (403) is fixedly connected to the top of each positioning bolt (402).

4. The waste oil and grease metal impurity centrifuge according to claim 3, characterized in that: The upper surface of the outer cone (301) is hinged with four positioning plates (404), and each positioning plate (404) has a preset groove (405) on its inner wall. The positioning bolt (402) and the positioning baffle (403) are adapted to the preset groove (405).

5. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: The top of the centrifuge housing (1) is threadedly connected to a top cover (5), an oil injection pipe (6) is installed inside the top cover (5), and a sealing ring (7) is fixedly connected to the edge of the bottom surface of the top cover (5).

6. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: The bottom surface of the centrifuge shell (1) is fixedly connected to four support columns (8), and each support column (8) is fixedly connected to a mounting base (9) at its bottom end.

7. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: The bottom of the centrifuge housing (1) is connected to two symmetrical drain pipes (10), and each drain pipe (10) is equipped with a solenoid valve (11).

8. The waste oil and grease metal impurity centrifuge according to claim 1, characterized in that: An external connector (13) is installed on the outer surface of the centrifuge housing (1). The output end of the external connector (13) is connected to a nozzle (14). The nozzle (14) is located inside the centrifuge housing (1). A controller (12) is fixedly connected to the outer surface of the centrifuge housing (1).

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