Multi-stage oil filter and use method thereof

Abstract

The invention provides a multi-stage oil filter and a use method thereof, and belongs to the technical field of oil purification. The problems of high material consumption and low oil-water separation efficiency are solved. The oil tank comprises a first oil tank body, a second oil tank body and a third oil tank body, the first oil tank body is communicated with the second oil tank body, the second oil tank body is communicated with the third oil tank body, the bottom of the second oil tank body and the bottom of the third oil tank body are each provided with a drain outlet, and a plurality of oil gathering plates are arranged in the first oil tank body. The plurality of oil gathering plates are arranged at equal intervals in the flowing direction of an oil-water mixture, isolation hoods are arranged in the first oil bin and the second oil bin, adjusting blocks are arranged on the inner sides of the isolation hoods, open holes are formed in the bottom sides of the isolation hoods, and the adjusting blocks in the first oil bin are arranged close to the communicating position of the first oil bin and the second oil bin. The oil filter is mainly used for filtering oil in oil-water mixed liquid.

Description

Technical Field

[0001] The present invention belongs to the technical field of oil purification, and particularly relates to a multi-stage oil filter. Background Art

[0002] The oil separators on the market mainly rely on filters to filter oil and water. Through the filter, grease and suspended solids in water can be effectively removed, and the filtering effect is good. However, the cost of filter element filtration is relatively high, the filter element needs to be replaced regularly, and the maintenance cost is relatively high. If used improperly, it may cause the filter element to be blocked, affecting the filtering effect. The hanging belt type oil separator has a simple structure and does not require the replacement of consumables, but the oil removal efficiency is relatively low, and the hanging belt needs to be cleaned or replaced frequently, and the treatment effect on high-concentration oil pollution is not good; the float absorption filter uses the buoyancy principle and can automatically adsorb the grease on the water surface. However, due to its single structure and low oil removal efficiency, and the float needs to be cleaned or replaced regularly, it also increases the consumables and results in a relatively high filtration cost. Summary of the Invention

[0003] In view of this, the present invention aims to provide a multi-stage oil filter to solve the problems of many consumables and low oil-water separation efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions: A multi-stage oil filter, which includes a first oil tank, a second oil tank, and a third oil tank. The first oil tank is communicated with the second oil tank, the second oil tank is communicated with the third oil tank, and sewage outlets are provided at the bottoms of the second oil tank and the third oil tank. A plurality of oil collecting plates are arranged in the first oil tank, and the plurality of oil collecting plates are arranged at equal intervals along the flowing direction of the oil-water mixture. An isolation cover is arranged in the first oil tank and the second oil tank. An adjusting block is arranged inside the isolation cover, an opening is arranged at the bottom side of the isolation cover, and the adjusting block in the first oil tank is arranged near the connection between the first oil tank and the second oil tank.

[0005] Furthermore, the oil collecting plate is made of stainless steel material and has a rough surface.

[0006] Furthermore, the isolation cover includes a first isolation cover and a second isolation cover. The first isolation cover is arranged in the first oil tank, and the second isolation cover is arranged in the second oil tank.

[0007] Furthermore, the adjusting block includes a first adjusting block and a second adjusting block. The first adjusting block is arranged in the first isolation cover, the second adjusting block is arranged in the second isolation cover, the first adjusting block and the second adjusting block have the same external shape structure, and the circumferential dimension of the first adjusting block is larger than that of the second adjusting block.

[0008] Further, the adjusting block includes an adjusting rod, a sleeve and a joint. The adjusting rod is connected to the top of the sleeve. Threads are provided on both the inner surface of the sleeve and the outer surface of the joint, and the sleeve is connected to the joint by threads.

[0009] Further, the first oil sump is communicated with the buffer oil tank, the buffer oil tank is communicated with the buffer pipe, and a sewage outlet is provided at the bottom of the buffer oil tank.

[0010] Further, the buffer pipe includes a water inlet pipe, a water distribution pipe and a fixed flange. The water distribution pipe is sleeved outside the water inlet pipe. One end of the water distribution pipe is connected to the water inlet pipe through the fixed flange. Oval through holes are equally spaced on the side walls of the water inlet pipe and the water distribution pipe, and are communicated with the buffer oil tank through the oval through holes.

[0011] Further, the first oil sump, the second oil sump and the buffer oil tank are all arranged in the housing. A handle is provided at the top of the housing, and a viewing cover is provided on one side of the housing close to the second oil sump.

[0012] Further, a ball valve is provided at the sewage outlet at the bottom of the third oil sump.

[0013] A method for using a multi-stage oil filter includes the following steps:

[0014] S1: The oil-water mixture flows into the first oil sump. Small oil droplets in the oil-water mixture adhere to several oil collecting plates in the first oil sump, causing the small oil droplets to converge into large oil droplets, and the oil-water mixture is stratified due to gravity.

[0015] S3: Adjust the height of the adjusting block in the first oil sump to make the oil-water mixture in the first oil sump flow into the second oil sump to complete the first oil-water separation.

[0016] S4: Adjust the height of the adjusting block in the second oil sump to make the oil-water mixture in the second oil sump flow into the third oil sump to complete the second oil-water separation.

[0017] S5: The oil that has completed two separations enters the third oil sump and is discharged through the third oil sump.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The present invention can achieve efficient oil-water separation. Through multiple oil-water separations, the separation effect is gradually improved to ensure that the water in the oil-water mixture is removed. The oil collecting plates are made of stainless steel and the surfaces are polished to be rough, which can aggregate small oil droplets into large oil droplets, thereby increasing the buoyancy of the oil droplets and making the oil droplets float more easily, thus improving the oil-water separation efficiency.

[0020] 2. The present invention generally sets an adjusting block to change the height of the adjusting block, thereby changing the flow direction of the oil-water mixture, so as to adapt to the characteristics of different oil-water mixtures and ensure the separation effect.

[0021] 3. The present invention realizes the multiple separation of oil and water by respectively arranging regulating blocks in two oil storage tanks. After multiple separations, the purity of the oil liquid is high, which can reduce the wear of the equipment and extend the service life of the equipment.

[0022] 4. The present invention has a compact structure, occupies a small space, and is convenient for installation and use.

[0023] 5. The bottom of the oil storage tank of the present invention is provided with sewage outlets, which can regularly discharge the precipitated impurities and particles, maintain the cleanliness and filtering effect of the oil filter. Each component is reasonably arranged, convenient for disassembly and cleaning. By setting an oil collecting plate to replace the filter element in the prior art, only the oil collecting plate needs to be regularly cleaned, and there is no need to replace consumables, so the maintenance cost is low.

[0024] 6. Through effective oil-water separation, the present invention reduces the moisture and impurities in the oil liquid and reduces environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0026] Figure 1 is an axonometric structure schematic diagram of a multi-stage oil filter according to the present invention;

[0027] Figure 2 is an axonometric perspective structure schematic diagram of a multi-stage oil filter according to the present invention from the first perspective

[0028] Figure 3 is an axonometric perspective structure schematic diagram of a multi-stage oil filter according to the present invention from the second perspective;

[0029] Figure 4 is a top perspective structure schematic diagram of a multi-stage oil filter according to the present invention;

[0030] Figure 5 is an axonometric structure schematic diagram of a buffer tube of a multi-stage oil filter according to the present invention;

[0031] Figure 6 is a sectional structure schematic diagram of a buffer tube of a multi-stage oil filter according to the present invention;

[0032] Figure 7 is an axonometric structure schematic diagram of a regulating valve of a multi-stage oil filter according to the present invention;

[0033] Figure 8 is a sectional structure schematic diagram of a regulating valve of a multi-stage oil filter according to the present invention.

[0034] In the figure:

[0035] 1. Buffer tube; 2. Buffer oil tank; 3. First adjustment block; 4. Oil collecting plate; 5. First oil chamber; 6. Second oil chamber; 7. Second adjustment block; 8. Third oil chamber; 9. Transparent cover; 10. Water inlet pipe; 11. Water distribution pipe; 12. Fixed flange; 13. Adjusting rod; 14. Sleeve; 15. Connector. Specific implementation mode

[0036] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. It should be noted that, without conflict, the embodiments in the present invention and the features in the embodiments can be combined with each other. The described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0037] See Figures 1-7 In this embodiment, a multi-stage oil filter includes a first oil chamber 5, a second oil chamber 6 and a third oil chamber 8. The first oil chamber 5 is communicated with the second oil chamber 6, and the second oil chamber 6 is communicated with the third oil chamber 8. The first oil chamber 5, the second oil chamber 6 and the third oil chamber 8 obtain the desired oil liquid through multiple stages of treatment, remove moisture and other impurities in the oil-water mixture, and realize oil-water separation. Drainage ports are provided at the bottoms of the second oil chamber 6 and the third oil chamber 8, and the drainage ports are used to regularly discharge the collected pollutants to ensure the cleanliness and efficient operation of the oil filter. A number of oil collecting plates 4 are arranged in the first oil chamber 5. The number of oil collecting plates 4 are arranged at equal intervals along the flowing direction of the oil-water mixture. Openings are provided at the bottoms of the number of oil collecting plates 4, and the bottom openings are staggered, which is convenient for better aggregating the oil in the oil-water mixture into large oil droplets, promoting the effect of oil-water separation, and thus improving the oil filtering efficiency. An isolation cover is arranged in the first oil chamber 5 and the second oil chamber 6. An adjustment block is arranged inside the isolation cover, and an opening is provided at the bottom side of the isolation cover. The adjustment block in the first oil chamber 5 is arranged near the connection between the first oil chamber 5 and the second oil chamber 6. The adjustment block and the oil chamber where the adjustment block is located form a communicating vessel through the isolation cover. When the adjustment block descends, the liquid level inside the glass cover drops while the liquid level outside the glass cover rises. Therefore, by adjusting the height of the adjustment block, the oil-water mixture outside the isolation cover can flow into the next oil chamber.

[0038] The working principle of the present invention is as follows:

[0039] The oil-water mixture passes through the first oil tank 5, the second oil tank 6, and the third oil tank 8 in sequence to achieve oil-water separation. First, the oil-water mixture enters the first oil tank 5. A number of oil-accumulating plates 4 arranged at equal intervals in the first oil tank 5 aggregate the small oil droplets in the oil-water mixture into large oil droplets, thereby increasing the buoyancy of the oil droplets and making it easier for the oil droplets to float upward, realizing the gravity stratification of oil and water. By adjusting the height of the adjusting block in the first oil tank 5, the oil-water mixture in the first oil tank 5 flows into the second oil tank 6 to achieve the first oil-water separation. By adjusting the adjusting block in the second oil tank 6, the oil-water mixture in the second oil tank 6 flows into the third oil tank 8. The water in the second oil tank 6 is discharged through the sewage outlet at the bottom to achieve the second oil-water separation. The oil-water mixture after two separations is stored in the third oil tank 8 and finally discharged through the sewage outlet at the bottom of the third oil tank 8.

[0040] The oil-accumulating plate 4 is made of stainless steel material and has a rough surface. By roughing the stainless steel surface, the lipophilicity of the stainless steel surface can be improved, so that the oil in the oil-water mixture can better adhere to the surface of the oil-accumulating plate 4. And the oil-accumulating plate 4 made of stainless steel material does not need to be replaced regularly, only needs to be cleaned regularly, so no consumables will be generated.

[0041] The isolation cover includes a first isolation cover and a second isolation cover. The first isolation cover is arranged in the first oil tank 5, and the second isolation cover is arranged in the second oil tank 6. By setting the isolation cover, the oil tank where it is located forms a communicating vessel. The oil-water mixture in the first oil tank 5 passes through the oil-accumulating plate 4 and then enters the isolation cover through the opening at the bottom of the isolation cover. The liquid level height inside the isolation cover is the same as the liquid level height outside the isolation cover. By adjusting the height of the adjusting block in the isolation cover, the liquid level height outside the isolation cover is changed. When the height of the adjusting block decreases, the liquid level height inside the isolation cover drops, while the liquid level height outside the isolation cover rises. When the height of the adjusting block increases, the liquid level height inside the isolation cover rises, while the liquid level height outside the isolation cover drops.

[0042] The adjusting block includes a first adjusting block 3 and a second adjusting block 7. The first adjusting block 3 is arranged in the first isolation cover, and the second adjusting block 7 is arranged in the second isolation cover. The first adjusting block 3 and the second adjusting block 7 have the same external structure. The circumferential dimension of the first adjusting block 3 is larger than the circumferential dimension of the second adjusting block 7. By setting the first adjusting block 3 and the second adjusting block 7 with different circumferential dimensions, the flow rate of the oil-water mixture is controlled. The larger first adjusting block 3 can process a large amount of oil-water mixture faster to achieve the rough filtration of the oil-water mixture, and the smaller second adjusting block 7 is used for more refined filtration of the oil-water mixture.

[0043] See Figures 7-8Describing this embodiment, the adjusting block includes an adjusting rod 13, a sleeve 14 and a joint 15. The adjusting rod 13 is connected to the top of the sleeve 14. Threads are provided on the inner surface of the sleeve 14 and the outer surface of the joint 15. The sleeve 14 is connected to the joint 15 by threads. By rotating the adjusting rod 13, the sleeve 14 is driven to rotate, so that the sleeve 14 moves up and down along the joint 15. When the sleeve moves upward, the liquid level outside the glass cover decreases, and the liquid level inside the glass cover rises. When the sleeve moves downward, the liquid level inside the glass cover decreases, and the liquid level outside the glass cover rises. The first oil storage tank 5 is communicated with the buffer oil tank 2. The buffer oil tank 2 is communicated with the buffer pipe 1. A sewage outlet is provided at the bottom of the buffer oil tank 2. The buffer pipe 1 and the buffer oil tank 2 are used to reduce the flow rate of the oil-water mixture, so as to reduce the impact and turbulence before entering the first oil storage tank 5, thereby improving the filtration efficiency. The buffer oil tank 2 serves as a container for storing and stabilizing the liquid flow. The outlet of the buffer oil tank 2 is communicated with the inlet of the first oil storage tank 5, so that the oil-water mixture can flow smoothly into the first oil storage tank 5.

[0044] See Figures 5-6 Describing this embodiment, the buffer pipe 1 includes a water inlet pipe 10, a water distribution pipe 11 and a fixed flange 12. The water distribution pipe 11 is sleeved outside the water inlet pipe 10. The water inlet pipe 10 is used to guide the oil-water mixture to enter. One end of the water distribution pipe 11 is connected to the water inlet pipe 10 through the fixed flange 12. The fixed flange 12 ensures the stability and reliability of the whole structure. Oval through holes are equally spaced on the side walls of the water inlet pipe 10 and the water distribution pipe 11. The buffer pipe 1 is communicated with the buffer oil tank 2 through the oval through holes. The inflowing oil-water mixture is dispersed through the oval openings provided on the water inlet pipe 10 and the water distribution pipe 11, so as to achieve a more uniform flow. The buffer pipe 1 and the buffer oil tank 2 are used to pre-treat the oil-water mixture, so as to reduce the impact force of the oil-water mixture, thereby protecting other parts of the oil filter and improving the filtration efficiency. The outlet of the buffer oil tank 2 is communicated with the inlet of the first oil storage tank 5, ensuring that the oil-water mixture can flow smoothly from the buffer oil tank 2 into the first oil storage tank 5, and starting the first-stage filtration process.

[0045] The first oil storage tank 5, the second oil storage tank 6 and the buffer oil tank 2 are all arranged in the shell. A handle is provided at the top of the shell. The shell includes a top plate, side plates and a bottom plate. A handle is provided on the top plate. The side plates and the bottom plate are of an integral structure. The top plate can be removed by pulling up the handle, which is convenient for adjusting the height of the regulating valve. A perspective cover 9 is provided on one side of the shell close to the second oil storage tank 6. The perspective cover is a transparent window, which is convenient for the operator to observe the liquid level height and the liquid flow through the provided perspective cover 9, so as to adjust the adjusting block more accurately and thus achieve a better filtration effect.

[0046] A ball valve is provided at the sewage outlet at the bottom of the third oil storage tank 8. By providing the ball valve, the discharge of the filtered oil can be controlled more precisely.

[0047] A method for using a multi - stage oil filter, comprising the following steps:

[0048] S1: The oil - water mixture is pumped into the buffer tank 2 through a pneumatic diaphragm pump and a buffer pipe 1. The oil - water mixture is buffered through the buffer pipe 1 and the buffer tank 2 to reduce the impact force of the oil - water mixture. After buffering, the oil - water mixture flows into the first oil chamber (5). The small oil droplets in the oil - water mixture adhere to several oil - collecting plates (3) in the first oil chamber (5). The oil - collecting plate 4 is made of stainless steel after rough treatment, thereby improving the oil - wettability of the oil - collecting plate 4, making it easier for small oil droplets to adhere to the surface of the oil - collecting plate 4, and causing the small oil droplets to converge into large oil droplets. Due to the different densities of oil and water, the oil - water mixture will stratify under the action of gravity, causing most of the oil to float on the water surface;

[0049] S3: Adjust the height of the adjusting block in the first oil chamber (5) to change the liquid levels on both sides of the isolation cover, that is, rotate the adjusting rod 13 on the adjusting block downward or upward, so that the oil - water mixture in the first oil chamber (5) flows into the second oil chamber (5), and the water layer below remains in the first oil chamber 5, completing the first oil - water separation;

[0050] S4: Adjust the height of the adjusting block in the second oil chamber (6) to change the liquid levels on both sides of the isolation cover, that is, rotate the adjusting rod 13 on the adjusting block downward or upward, so that the oil - water mixture in the second oil chamber (6) flows into the third oil chamber (8), and the water layer below remains in the second oil chamber 6. The water in the second oil chamber 6 can be discharged through the sewage outlet, completing the second oil - water separation;

[0051] S5: The oil that has completed two separations enters the third oil chamber (8) and is discharged through the third oil chamber (8). After two separations, the oil in the third oil chamber 8 is relatively pure. By opening the ball valve on the sewage outlet at the bottom of the third oil chamber 8, the separated oil can be discharged, thereby obtaining oil for subsequent use.

[0052] In this way, the present invention can process the oil - water mixture in stages, gradually remove the water and impurities in the oil - water mixture, and finally achieve the purpose of purification. The present invention can also be applied to the application scenarios of high - purity oil. Through the present invention, the quality of the oil can be ensured, the service life of the oil can be extended, and equipment failures caused by oil pollution can be reduced.

[0053] The embodiments of the present invention disclosed above are only used to help illustrate the present invention. The embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. According to the content of this specification, many modifications and changes can be made. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the relevant technical field can well understand and utilize the present invention.

Claims

1. A multi-stage oil filter, characterized in that: It comprises a first oil bin (5), a second oil bin (6) and a third oil bin (8), wherein the first oil bin (5) is connected to the second oil bin (6), the second oil bin (6) is connected to the third oil bin (8), sewage outlets are arranged at the bottom of the second oil bin (6) and the third oil bin (8), a plurality of oil collecting plates (4) are arranged in the first oil bin (5), and the plurality of oil collecting plates (4) are arranged at equal intervals along the flow direction of the oil-water mixture, an isolation cover is arranged in the first oil bin (5) and the second oil bin (6), an adjustment block is arranged inside the isolation cover, and an opening is arranged on the bottom of the isolation cover, and the adjustment block in the first oil bin (5) is arranged near the connection between the first oil bin (5) and the second oil bin (6).

2. A multi-stage oil filter according to claim 1, characterized in that: The oil collecting plate (4) is made of stainless steel and has a rough surface.

3. A multi-stage oil filter according to claim 1, characterized in that: The isolation cover comprises a first isolation cover and a second isolation cover, wherein the first isolation cover is arranged in a first oil bin (5) and the second isolation cover is arranged in a second oil bin (6).

4. A multi-stage oil filter according to claim 3, characterized in that: The adjustment block comprises a first adjustment block (3) and a second adjustment block (7); the first adjustment block (3) is arranged in a first isolation cover, and the second adjustment block (7) is arranged in a second isolation cover; the first adjustment block (3) and the second adjustment block (7) have the same external structure; and the circumferential size of the first adjustment block (3) is larger than the circumferential size of the second adjustment block (7).

5. A multi-stage oil filter according to claim 1, characterized in that: The adjusting block comprises an adjusting rod (13), a sleeve (14) and a joint (15); the adjusting rod (13) is connected to the top of the sleeve (14); the inner surface of the sleeve (14) and the outer surface of the joint (15) are both provided with threads; the sleeve (14) and the joint (15) are connected by threads.

6. A multi-stage oil filter according to claim 1, characterized in that: The first oil tank (5) is in communication with the buffer oil tank (2), the buffer oil tank (2) is in communication with the buffer pipe (1), and a sewage outlet is arranged at the bottom of the buffer oil tank (2).

7. A multi-stage oil filter according to claim 6, characterized in that: The buffer pipe (1) comprises a water inlet pipe (10), a water distribution pipe (11) and a fixed flange (12); the water inlet pipe (10) is sleeved on the outside of the water distribution pipe (11); one end of the water distribution pipe (11) is connected to the water inlet pipe (10) via the fixed flange (12); elliptical through holes are formed at equal intervals on the side walls of the water inlet pipe (10) and the water distribution pipe (11), and the water inlet pipe (10) and the water distribution pipe (11) are connected to the buffer oil tank (2) via the elliptical through holes.

8. The multi-stage oil filter according to claim 1, characterized in that: The first oil bin (5), the second oil bin (6) and the buffer oil tank (2) are all arranged in a shell, a handle is arranged on the top of the shell, and a see-through cover (9) is arranged on the side of the shell close to the second oil bin (6).

9. The multi-stage oil filter according to claim 1, characterized in that: The sewage outlet at the bottom of the third oil bin (8) is provided with a ball valve.

10. A method for using the multi-stage oil filter as claimed in claim 1, characterized in that: The following steps are involved: S1: The oil-water mixture flows into the first oil bin (5), and the small oil droplets in the oil-water mixture adhere to a plurality of oil collecting plates (3) in the first oil bin (5), so that the small oil droplets gather into large oil droplets, and the oil-water mixture is separated into layers due to gravity; S3: adjusting the height of the adjusting block in the first oil bin (5) so that the oil-water mixture in the first oil bin (5) flows into the second oil bin (5), thus completing the first oil-water separation; S4: adjusting the height of the regulating block in the second oil bin (6) so that the oil-water mixture in the second oil bin (6) flows into the third oil bin (8), thus completing the second oil-water separation; S5: The oil that has completed the two separations enters the third oil bin (8) and is discharged through the third oil bin (8).

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