An electrostatic adsorption type oil filtering system

Abstract

The present invention relates to the technical field of oil filtration, and discloses an electrostatic adsorption type oil filtration system, which includes a filtration tank, a top cover, an insulating partition barrel, a filter element and an electrostatic adsorption mechanism. The lower left end of the filtration tank is fixedly connected with an oil inlet, the upper left end of the filtration tank is fixedly connected with an oil outlet, a sewage outlet is arranged at the lower right end of the filtration tank, a lead outlet is arranged at the upper right end of the filtration tank, and a positioning seat is arranged at the middle of the inner bottom of the filtration tank; an extension ring is fixedly arranged downward at the inner end of the bottom of the top cover, and the top cover is installed at the upper end of a flange plate; the filter element is arranged inside the insulating partition barrel, a fixed shaft is fixedly arranged at the middle of the inside of the filter element, and the bottom of the fixed shaft extends downward and is installed inside the positioning seat; the electrostatic adsorption mechanism is arranged above the inside of the insulating partition barrel and is installed above the filter element. Compared with traditional filter elements, the filtration accuracy of the present invention is greatly improved, so that particulate impurities and moisture in the oil are charged and adsorbed and separated, thereby improving the filtration and purification effect.

Description

Technical Field

[0001] The present invention relates to the technical field of oil filtering, and particularly to an electrostatic adsorption type oil filtering system. Background Art

[0002] During the operation of power plant oils, they will be affected by factors such as moisture, impurities, and temperature, resulting in oil aging, and key indicators such as moisture, particle size, acid value, demulsibility, resistivity, etc. being unqualified, seriously affecting the safe operation of on-site units.

[0003] Currently, the commonly used treatment methods include vacuum separation, resin adsorption, electrostatic filtration, etc., but each has its own limitations. Vacuum separation is mostly used for dehydration, but it cannot handle dissolved aging products; resin filters will generate additional moisture during use; traditional electrostatic filtration also cannot effectively filter acidic products. Traditional oil filtering technologies mainly rely on mechanical interception or single adsorption, and the filtering and purification effects are poor. Therefore, corresponding technical solutions need to be designed to solve this problem. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the present invention provides an electrostatic adsorption type oil filtering system, which solves its technical problems.

[0005] To achieve the above object, the present invention is realized through the following technical solutions: An electrostatic adsorption type oil filtering system includes a filtering tank, a top cover, an insulating partition barrel, a filter element, and an electrostatic adsorption mechanism. The lower left end of the filtering tank is fixedly connected with an oil inlet, the upper left end of the filtering tank is fixedly connected with an oil outlet, the lower right end of the filtering tank is provided with a sewage outlet, the upper right end of the filtering tank is provided with a lead wire port, flange plates are fixedly provided at both the upper and lower ends of the filtering tank, and a positioning seat is provided in the middle of the inner bottom of the filtering tank;

[0006] The top of the top cover is provided with a convex structure, and an extension ring is fixedly provided downward at the inner end of the bottom of the top cover. The top cover is installed at the upper end of the flange plate;

[0007] The filter element is arranged inside the insulating partition barrel, and a fixed shaft is fixedly arranged in the middle of the filter element. The bottom of the fixed shaft extends downward and is installed inside the positioning seat;

[0008] The electrostatic adsorption mechanism is arranged above the insulating partition barrel and installed above the filter element.

[0009] Preferably, wire passing openings are symmetrically formed near the upper end of the insulating partition barrel. An insulating support plate is fixedly provided at the bottom of the insulating partition barrel. A through hole is formed in the middle of the insulating support plate, and fixing grooves are evenly distributed on the upper end of the insulating support plate. The insulating partition barrel has the function of insulating between the filter tank and the filter element. The wire passing openings are used for convenient wire passing or disassembly. The fixing grooves are used for fixedly clamping and placing multiple metal partition cylinders in a cylindrical structure. The through hole is used for penetrating and locking the fixing shaft. The insulating support plate is used for insulating support of the filter element.

[0010] Preferably, the filter element includes metal partition cylinders and a folded filter paper structure. The metal partition cylinders are sequentially sleeved and distributed in multiple cylindrical structures. The folded filter paper structures are respectively filled between the metal partition cylinders. The metal partition cylinders are made of stainless steel material. The folded filter paper structure uses DMD insulating paper. The thickness of the metal partition cylinder is 0.8 mm. The folded filter paper structure is serrated and the creases extend in the vertical direction. A strongly polar adsorbent material is filled in the voids of the folded filter paper structure. The strongly polar adsorbent material is a strongly polar macroporous spherical molecular sieve adsorbent. By using the special action mechanism between molecules and the critical adsorption effect, selective purification is carried out, and the adsorption capacity is much higher than that of other traditional adsorbents. The metal partition cylinder made of 0.8 mm stainless steel material is corrosion-resistant and durable. DMD insulating paper is a three-layer soft composite material formed by coating a polyester film with an adhesive and bonding polyester fiber non-woven fabrics on both sides, and has good insulation effect.

[0011] Preferably, the electrostatic adsorption mechanism is a cross-shaped covering electrostatic adsorption mechanism. The cross-shaped covering electrostatic adsorption mechanism includes a cross-shaped covering member, a collar, and a first electrostatic adsorption mechanism. The collar is fixedly provided at the outer upper end of the fixing shaft. The cross-shaped covering member is fixedly provided on the outer side wall of the collar, and both the cross-shaped covering member and the collar are pressed above the filter element. The first electrostatic adsorption mechanism passes through the cross-shaped covering member and is electrically connected to the inside of the filter element. The collar is used for sleeving on the outside of the fixing shaft. The cross-shaped covering member is used for fixedly covering above the filter element. The first electrostatic adsorption mechanism is located above the cross-shaped covering member and performs electrostatic adsorption on the filter element.

[0012] Preferably, the first electrostatic adsorption mechanism is composed of a power supply power cord 1, a power supply ring, an extension plate, an electrode clamping plate 1 and an electrode clamping plate 2. The lower end of the power supply power cord 1 is connected above the power supply ring, and the upper end of the power supply power cord 1 penetrates and is connected to the wire passing port. A support rod 1 is fixedly arranged at the bottom of the power supply ring, and the electrode clamping plate 1 is fixedly arranged at the lower end of the support rod 1; the extension plates are fixedly distributed on the outer side wall of the power supply ring, a support rod 2 is fixedly arranged at the bottom of the outer end of the extension plate, and the electrode clamping plate 2 is fixedly arranged at the lower end of the support rod 2; both the electrode clamping plate 1 and the electrode clamping plate 2 are N-shaped structures and are clamped above the metal separator tube; the power supply power cord 1 is used for power supply input, the power supply ring is used for fixing multiple groups of support rods 1 and electrode clamping plates 1 downward, the extension plate is used for extending outward to fix the support rod 2 and the electrode clamping plate 2, and the N-shaped electrode clamping plates 1 and 2 are used for contacting above the metal separator tube for electrostatic adsorption of oil filtration.

[0013] Preferably, the electrostatic adsorption mechanism is a cross-shaped covering electrostatic adsorption mechanism. The cross-shaped covering electrostatic adsorption mechanism includes a cross-shaped covering member, a support plate, a fixed disk, a fixed ring and a second electrostatic adsorption mechanism. The fixed rings are circular ring structures with different diameters and are sequentially distributed inside the fixed disk. The support plates are fixedly distributed on the outer side wall of the cross-shaped covering member, and the support plates are fixedly arranged at the upper ends of the fixed disk and the fixed ring. A chute is opened inside the support plate, and the second electrostatic adsorption mechanism is slidably connected to the chute and extends downward through the gap of the fixed ring; the cross-shaped covering member, the support plate, the fixed disk and the fixed ring are used for stably covering and pressing the upper part of the filter element. The fixed rings with circular ring structures of different diameters are used for smoothly passing the oil fluid and penetrating and connecting the second electrostatic adsorption mechanism.

[0014] Preferably, the second electrostatic adsorption mechanism is composed of a power supply power cord 2, a power supply connection wire, a support, an electrode sheet, a positioning plate and a limiting sliding plate. The positioning plates are symmetrically structured and an installation plate is fixedly arranged at the inner end. The installation plate is butt-joint installed in the middle of the chute. The limiting sliding plate is fixedly arranged at the outer end of the positioning plate and is limited and slides to the front and rear ends of the support plate. The support is fixedly arranged at the outer end of the limiting sliding plate. A support rod 3 is fixedly arranged at the bottom of the support. The electrode sheet is fixedly arranged at the bottom of the support rod 3. The electrode sheet contacts the inner wall of the metal separator tube. The power supply connection wire is electrically connected to the upper end of the support. The lower end of the power supply power cord 2 is electrically connected with a connector. The upper part of the power supply connection wire is plugged and installed at the front and rear ends of the connector; the power supply power cord 2, the connector and the power supply connection wire are used for supplying power to the support. The support and the support rod 3 are used for passing through the gap of the fixed ring and fixing the electrode sheet downward. The electrode sheet directly contacts the metal separator tube for electrostatic adsorption of oil filtration. The positioning plate is butt-joint installed through the installation plate. The positioning plate and the limiting sliding plate are stably slid and adjusted at the inner part and the front and rear ends of the chute to the position where electrostatic adsorption is required.

[0015] Preferably, locking bolts and lock nuts are distributed through and connected at both ends of the mounting plate; a support plate is fixedly provided below the side of the limiting sliding plate at one end, a transfer plate is fixedly provided at the inner end of the support plate, a fixing cylinder is fixedly provided through the middle of the transfer plate, an adjusting screw rod is connected through the inside of the fixing cylinder by threads, a rotating plate is fixedly provided at the upper end of the adjusting screw rod, and the bottom of the adjusting screw rod is a rounded corner structure; the locking bolts and lock nuts are used for quickly disassembling and assembling the mounting plate, with low cost and simple operation. The support plate and the transfer plate are used for fixedly arranging the fixing cylinder at the inner end, the fixing cylinder is used for limiting the up and down adjustment of the adjusting screw rod, the rotating plate is used for manually rotating and operating the adjusting screw rod, and the rounded corner structure is convenient for stably supporting and locking into the inside of the sliding groove to prevent it from sliding easily.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The present system introduces the electric field polarization effect, enabling particulate impurities, moisture, and acidic molecules in the oil to undergo directional migration under the action of the electric field, forming a two-stage purification path of "electric field pre-separation - medium adsorption enhancement"; the electric field generating assembly enables micron-sized particles (1 - 10 μm) in the oil to obtain a saturated charge amount, and under the action of the Coulomb force, they are accelerated and migrated to the surface of the folded filter paper, which can increase the particle capture efficiency by 40% - 60%, greatly improving the filtration accuracy compared with traditional filter elements; the strongly polar macroporous spherical molecular sieve adsorbent generates a critical adsorption effect under the action of the electric field gradient, and the surface potential distribution thereof forms a synergistic effect with the direction of the electric field. When the oil flows through the crease depression area, the local electric field intensity increases, enabling acidic molecules to be arranged directionally and breaking through the mass transfer resistance of traditional adsorbents. The measured acid value purification efficiency is increased by 35% - 50%.

[0017] The electrostatic adsorption mechanism of the system adopts a cross-shaped covering electrostatic adsorption mechanism or a star-shaped covering electrostatic adsorption mechanism, adopting different electrostatic adsorption oil filtration modes, solving the technical bottlenecks such as uneven electric field distribution and easy short-circuit of electrodes in traditional electrostatic oil removal equipment. The cross-shaped covering electrostatic adsorption mechanism generates a uniform electric field on the filter element, enabling the particle charging efficiency to reach 92% - 95%. The star-shaped covering electrostatic adsorption mechanism breaks through the traditional uniform electric field theory framework through the gradient electric field design, realizing a 22% - 35% improvement in the synergistic conversion efficiency of "electric field energy - adsorption energy". The electrostatic adsorption mechanism charges and adsorbs and separates particulate impurities and moisture in the oil, and cooperates with the strongly polar adsorbent to adsorb the deteriorated acidic products in the oil, improving the filtration and purification effect. Description of the Drawings

[0018] Figure 1 It is a schematic structural diagram of the front upper right view of the filter tank of the present invention;

[0019] Figure 2 It is a schematic structural diagram of the front lower left view of the filter tank of the present invention;

[0020] Figure 3Schematic structural diagram of the front upper left perspective after the top cover of the filter tank of the present invention is removed;

[0021] Figure 4 Schematic structural diagram of the front upper right perspective after the top cover of the filter tank of the present invention is removed;

[0022] Figure 5 Schematic structural diagram of the upper internal part after the top cover of the filter tank of the present invention is removed;

[0023] Figure 6 Schematic structural diagram of the lower part of the top cover of the present invention;

[0024] Figure 7 Schematic structural diagram of the upper part of the top cover of the present invention;

[0025] Figure 8 Schematic structural diagram of the filter element inside the insulating partition barrel and the cross-shaped covering electrostatic adsorption mechanism above of the present invention;

[0026] Figure 9 Schematic structural diagram of the upper part of the cross-shaped covering member of the present invention;

[0027] Figure 10 Schematic diagram of the cross-shaped covering electrostatic adsorption mechanism of the present invention;

[0028] Figure 11 Of the present invention Figure 10 Enlarged structural diagram at position A;

[0029] Figure 12 Schematic structural diagram of the filter element inside the insulating partition barrel and the cross-shaped covering electrostatic adsorption mechanism above of the present invention;

[0030] Figure 13 Schematic diagram of the cross-shaped covering electrostatic adsorption mechanism of the present invention;

[0031] Figure 14 Schematic structural diagram of one end of the second electrostatic adsorption mechanism of the present invention;

[0032] Figure 15 Of the present invention Figure 14 Enlarged structural diagram at position B;

[0033] Figure 16 Of the present invention Figure 15 Enlarged structural diagram at position C;

[0034] Figure 17 Schematic structural diagram of the other end of the second electrostatic adsorption mechanism of the present invention;

[0035] Figure 18 Schematic structural diagram of the lower part of the insulating partition barrel of the present invention;

[0036] Figure 19 Partial structural schematic diagram of the insulating support plate at the lower end of the insulating separation barrel of the present invention;

[0037] Figure 20 Partial structural schematic diagram of the upper part of the filter element of the present invention;

[0038] Figure 21 Schematic diagram of the comparison of oil samples before and after treatment of the present invention.

[0039] In the figure, 1 is a filter tank; 11 is an oil inlet; 12 is an oil outlet; 13 is a sewage outlet; 14 is a lead outlet; 15 is a flange plate; 16 is a positioning seat; 2 is a top cover; 21 is an extension ring; 22 is a convex structure; 3 is an insulating separation barrel; 31 is a wire passing port; 32 is an insulating support plate; 321 is a through hole; 322 is a fixing groove; 4 is a filter element; 41 is a fixing shaft; 42 is a metal separation cylinder; 43 is a folded filter paper structure; 5 is a cross-shaped covering electrostatic adsorption mechanism; 50 is a cross-shaped covering member; 51 is a collar; 52 is a power supply wire one; 53 is a power supply ring; 54 is an extension plate; 55 is a support rod one; 56 is a support rod two; 57 is an electrode clamping plate one; 58 is an electrode clamping plate two; 6 is a cross-shaped covering electrostatic adsorption mechanism; 61 is a cross-shaped covering member; 62 is a support plate; 621 is a chute; 63 is a fixing disk; 64 is a fixing ring; 65 is a power supply wire two; 651 is a adapter; 66 is a power supply connection wire; 67 is a support; 671 is a support rod three; 672 is an electrode plate; 68 is a positioning plate; 681 is a mounting plate; 6811 is a locking bolt; 6812 is a locking nut; 682 is a limiting sliding plate; 69 is a support plate; 691 is a transfer plate; 692 is a fixing cylinder; 693 is an adjusting screw; 694 is a rotating plate. Detailed implementation manners

[0040] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0041] Please refer to Figures 1-21 , an embodiment of the present invention provides a technical solution: an electrostatic adsorption type oil filtering system, including a filter tank 1, a top cover 2, an insulating separation barrel 3, a filter element 4 and an electrostatic adsorption mechanism. The left lower end of the filter tank 1 is fixedly connected with an oil inlet 11, the left upper end of the filter tank 1 is fixedly connected with an oil outlet 12, the right lower end of the filter tank 1 is provided with a sewage outlet 13, the right upper end of the filter tank 1 is provided with a lead outlet 14, flange plates 15 are fixedly arranged at both the upper and lower ends of the filter tank 1, and a positioning seat 16 is arranged at the middle of the inner bottom of the filter tank 1;

[0042] The top of the top cover 2 is provided with a convex structure 22. The inner end of the bottom of the top cover 2 is fixedly provided with a downward extension ring 21. The top cover 2 is installed at the upper end of the flange plate 15.

[0043] The filter element 4 is arranged inside the insulating partition barrel 3. A fixed shaft 41 is fixedly arranged in the middle of the filter element 4. The bottom of the fixed shaft 41 extends downward and is installed inside the positioning seat 16.

[0044] The electrostatic adsorption mechanism is arranged above the inside of the insulating partition barrel 3 and installed above the filter element 4.

[0045] Further improved, the upper near end of the insulating partition barrel 3 is symmetrically provided with wire passing openings 31. The bottom of the insulating partition barrel 3 is fixedly provided with an insulating support plate 32. A through hole 321 is opened in the middle of the insulating support plate 32. Fixed slots 322 are evenly opened and distributed at the upper end of the insulating support plate 32.

[0046] The insulating partition barrel 3 has the function of insulating between the filter tank 1 and the filter element 4. The wire passing openings 31 are used for convenient wire passing or disassembly. The fixed slots 322 are used for fixedly clamping and placing multiple groups of cylindrical metal partition cylinders 42. The through hole 321 is used for penetrating and locking the fixed shaft 41. The insulating support plate 32 is used for insulating and supporting the filter element 4.

[0047] Further improved, the filter element 4 includes metal partition cylinders 42 and a folded filter paper structure 43. The metal partition cylinders 42 are sequentially sleeved and distributed in multiple groups of cylindrical structures. The folded filter paper structure 43 is respectively filled between the metal partition cylinders 42.

[0048] The metal partition cylinder 42 is made of stainless steel material. The folded filter paper structure 43 uses DMD insulating paper. The thickness of the metal partition cylinder 42 is 0.8 mm.

[0049] The folded filter paper structure 43 is serrated and the creases extend in the vertical direction. A strongly polar adsorption material is filled in the gaps of the folded filter paper structure 43. The strongly polar adsorption material is a strongly polar macroporous spherical molecular sieve adsorbent.

[0050] Utilize the special action mechanism between molecules and the critical adsorption effect for selective purification. The adsorption capacity is much higher than that of other traditional adsorbents. The metal partition cylinder 42 made of 0.8 mm stainless steel material is corrosion-resistant and durable. DMD insulating paper is a three-layer soft composite material formed by coating a polyester film with an adhesive and bonding polyester fiber non-woven fabric on both sides, with good insulation effect.

[0051] Further improved, the electrostatic adsorption mechanism is a cross-shaped covering electrostatic adsorption mechanism 5. The cross-shaped covering electrostatic adsorption mechanism 5 includes a cross-shaped covering member 50, a collar 51 and a first electrostatic adsorption mechanism. The collar 51 is fixedly arranged at the upper outer part of the fixed shaft 41. The cross-shaped covering member 50 is fixedly arranged on the outer side wall of the collar 51. Both the cross-shaped covering member 50 and the collar 51 are pressed above the filter element 4. The first electrostatic adsorption mechanism passes through the cross-shaped covering member 50 and is electrically connected to the inside of the filter element 4.

[0052] The collar 51 is used to be sleeved on the outside of the fixed shaft 41. The cross-shaped covering member 50 is used to fixedly cover above the filter element 4. The first electrostatic adsorption mechanism is located above the cross-shaped covering member 50 and performs electrostatic adsorption on the filter element 4.

[0053] Further improved, the first electrostatic adsorption mechanism is composed of a power supply power cord 52, a power supply ring 53, an extension plate 54, an electrode clamping plate 57 and an electrode clamping plate 58. The lower end of the power supply power cord 52 is connected above the power supply ring 53, and the upper end of the power supply power cord 52 is connected through the wire passing port 31. A support rod 55 is fixedly arranged at the bottom of the power supply ring 53. The electrode clamping plate 57 is fixedly arranged at the lower end of the support rod 55.

[0054] The extension plates 54 are fixedly distributed on the outer side wall of the power supply ring 53. A support rod 56 is fixedly arranged at the bottom of the outer end of the extension plate 54. The electrode clamping plate 58 is fixedly arranged at the lower end of the support rod 56.

[0055] Both the electrode clamping plate 57 and the electrode clamping plate 58 are N-shaped structures and are clamped above the metal separator tube 42.

[0056] The power supply power cord 52 is used for power supply input. The power supply ring 53 is used to fixedly hold a plurality of support rods 55 and electrode clamping plates 57 downward. The extension plate 54 is used to extend outward to fixedly hold the support rod 56 and the electrode clamping plate 58. The N-shaped electrode clamping plates 57 and 58 are used to contact above the metal separator tube 42 for electrostatic oil filtration.

[0057] Further improved, the electrostatic adsorption mechanism is a cross-shaped covering electrostatic adsorption mechanism 6. The cross-shaped covering electrostatic adsorption mechanism 6 includes a cross-shaped covering member 61, a support plate 62, a fixed disk 63, a fixed ring 64 and a second electrostatic adsorption mechanism. The fixed rings 64 are circular ring structures with different diameters and are sequentially distributed inside the fixed disk 63. The support plates 62 are fixedly distributed on the outer side wall of the cross-shaped covering member 61. The support plates 62 are fixedly arranged at the upper ends of the fixed disk 63 and the fixed ring 64. A chute 621 is opened inside the support plate 62. The second electrostatic adsorption mechanism is slidably connected to the chute 621 and extends downward through the gap of the fixed ring 64.

[0058] The cross-shaped cover 61, the support plate 62, the fixed disk 63, and the fixed ring 64 are used to stably cover and press above the filter element 4. The fixed ring 64 with a circular ring structure of different diameters is used to smoothly pass the oil fluid and is connected through and to the second electrostatic adsorption mechanism.

[0059] Further improved, the second electrostatic adsorption mechanism is composed of a power supply wire two 65, a power connection wire 66, a support 67, an electrode plate 672, a positioning plate 68, and a limit sliding plate 682. The positioning plate 68 has a symmetrical structure and an installation plate 681 is fixedly arranged at the inner end. The installation plate 681 is butted and installed in the middle of the chute 621. The limit sliding plate 682 is fixedly arranged at the outer end of the positioning plate 68 and is limited and slides to the front and rear ends of the support plate 62. The support 67 is fixedly arranged at the outer end of the limit sliding plate 682. A support rod three 671 is fixedly arranged at the bottom of the support 67. The electrode plate 672 is fixedly arranged at the bottom of the support rod three 671. The electrode plate 672 contacts the inner wall of the metal separator tube 42. The power connection wire 66 is electrically connected to the upper end of the support 67. The lower end of the power supply wire two 65 is electrically connected with a adapter 651. The front and rear ends of the power connection wire 66 are plugged and installed to the adapter 651.

[0060] The power supply wire two 65, the adapter 651, and the power connection wire 66 are used to supply power to the support 67. The support 67 and the support rod three 671 are used to pass through the gap of the fixed ring 64 and fix the electrode plate 672 downward. The electrode plate 672 directly contacts the metal separator tube 42 for electrostatic adsorption of oil filtration. The positioning plate 68 is butted and installed through the installation plate 681. The positioning plate 68 and the limit sliding plate 682 are stably slid and adjusted at the required positions for electrostatic adsorption inside and at the front and rear ends of the chute 621.

[0061] Specifically improved, locking bolts 6811 and locking nuts 6812 are distributed through and connected at both ends of the installation plate 681.

[0062] A support plate 69 is fixedly arranged below the side of the limit sliding plate 682 at one end. A transfer plate 691 is fixedly arranged at the inner end of the support plate 69. A fixed cylinder 692 is fixedly arranged through the middle of the transfer plate 691. An adjusting screw 693 is threadedly connected through the inside of the fixed cylinder 692. A rotating plate 694 is fixedly arranged at the upper end of the adjusting screw 693. The bottom of the adjusting screw 693 is a rounded corner structure.

[0063] The locking bolts 6811 and the locking nuts 6812 are used for quick disassembly and assembly of the installation plate 681, with low cost and simple operation. The support plate 69 and the transfer plate 691 are used to fixedly arrange the fixed cylinder 692 at the inner end. The fixed cylinder 692 is used to limit the up and down adjustment of the adjusting screw 693. The rotating plate 694 is used for hand-held rotation to operate the adjusting screw 693. The rounded corner structure is convenient for stably supporting and locking into the inside of the chute 621 to prevent it from sliding easily.

[0064] Working principle: The electrostatic adsorption mechanism charges the particulate impurities in the oil. The electric field generating component generates an electric field. The folded filter paper structure 43 is polarized in the electric field, and the charged particulate impurities aggregate and adsorb on the surface of the folded filter paper structure 43. At the same time, the acidic molecules in the oil also aggregate near the folded filter paper structure 43 due to electrophoresis, realizing the local enrichment of acidic molecules, and the enriched acidic molecules are adsorbed by the adsorbent.

[0065] The folded filter paper structure 43 is polarized in the electric field, generating a large local electric field gradient at the crease depressions of the folded filter paper structure 43, which is beneficial for the adsorption of charged impurities on the surface. At the same time, under the action of the electric field, the acidic molecules in the oil will also perform electrophoresis movement towards the crease depressions of the folded filter paper structure 43, realizing the enrichment of acidic molecules, increasing the local concentration of acidic molecules, and being beneficial for the adsorbent to effectively absorb the acidic molecules. The electric field action and the adsorbent cooperate to effectively reduce indicators such as the acid value, moisture content, and particle size of the oil.

[0066] The oil flows in from the lower oil inlet 11 of the filter tank 1 and then flows out from the upper oil outlet 12, ensuring sufficient contact between the oil and the overall filter element 4 and improving the purification effect. The sewage is discharged from the sewage outlet 13 and passes through the lead wire port 14 to connect to the power cable bundle of the electrostatic adsorption mechanism. The creases of the folded filter paper structure 43 extend along the direction of oil flow, ensuring the smoothness of oil flow.

[0067] Performance comparison between the first electrostatic adsorption mechanism of the cross-shaped covering electrostatic adsorption mechanism 5 and the second electrostatic adsorption mechanism of the star-shaped covering electrostatic adsorption mechanism 6:

[0068]

[0069] Example 1: Take 200 L of the lubricating oil in operation of the power plant steam turbine system and put it into an oil barrel, connect it to the new electrostatic adsorption type oil filter system, and use continuous circulation. After uninterruptedly processing for 72 h, test the key indicators of the oil sample, and the results are as follows.

[0070]

[0071] It can be seen from the table that this system can better process the aged operating oil and improve multiple key indicators.

[0072] Filter tank 1, oil inlet 11, oil outlet 12, sewage outlet 13, lead wire port 14, flange plate 15, positioning seat 16, top cover 2, extension ring 21, convex structure 22, insulating partition barrel 3, wire passing port 31, insulating support plate 32, through hole 321, fixing groove 322, filter element 4, fixing shaft 41, metal separator barrel 42, folded filter paper structure 43, cross-shaped covering electrostatic adsorption mechanism 5, cross-shaped covering part 50, collar 51, power supply power cord 1 52, power supply ring 53, extension plate 54, support rod 1 55, support rod 2 56, electrode clamping plate 1 57, electrode clamping plate 2 58, cross-shaped covering electrostatic adsorption mechanism 6, cross-shaped covering part 61, support plate 62, sliding groove 621, fixing disk 63, fixing ring 64, power supply power cord 2 65, adapter 651, power supply connection line 66, support 67, support rod 3 671, electrode plate 672, positioning plate 68, mounting plate 681, locking bolt 6811, locking nut 6812, limit sliding plate 682, support plate 69, adapter plate 691, fixing cylinder 692, adjusting screw 693, rotating plate 694 of the present invention. The components are all common standard parts or parts known to those skilled in the art. Their structures and principles can all be learned by those skilled in the art through technical manuals or obtained through conventional experimental methods. The problems solved by the present invention are that vacuum separation is mostly used for dehydration and cannot handle soluble aging products; resin filter elements will generate extra moisture during use; traditional electrostatic filtration cannot effectively filter acidic products either. Traditional oil filtration technologies mainly rely on mechanical interception or single adsorption, and the filtration and purification effects are poor. Through the mutual combination of the above components, the present system introduces the electric field polarization effect, enabling the particulate impurities, moisture and acidic molecules in the oil to migrate directionally under the action of the electric field, forming a two-stage purification path of "electric field pre-separation - medium adsorption enhancement"; the electric field generating component enables the micron-sized particles 1 - 10μm in the oil to obtain a saturated charge amount and be accelerated to migrate to the surface of the folded filter paper under the action of the Coulomb force, which can increase the particle capture efficiency by 40% - 60%, greatly improving the filtration accuracy compared with traditional filter elements; the strongly polar macroporous spherical molecular sieve adsorbent generates a critical adsorption effect under the action of the electric field gradient, and the surface potential distribution thereof forms a synergistic effect with the electric field direction. When the oil flows through the crease depression area, the local electric field intensity increases, enabling the acidic molecules to be arranged directionally and break through the mass transfer resistance of the traditional adsorbent. The measured acid value purification efficiency is increased by 35% - 50%.The electrostatic adsorption mechanism of the system adopts a cross-shaped covering electrostatic adsorption mechanism 5 or a star-shaped covering electrostatic adsorption mechanism 6, and adopts different electrostatic adsorption oil filtration modes, which solves the technical bottlenecks such as uneven electric field distribution and easy short-circuit of electrodes in traditional electrostatic oil removal equipment. The cross-shaped covering electrostatic adsorption mechanism 5 generates a uniform electric field on the filter element 4, so that the particle charge efficiency reaches 92%-95%. The star-shaped covering electrostatic adsorption mechanism 6 breaks through the traditional uniform electric field theory framework through gradient electric field design, and realizes a 22%-35% improvement in the synergistic conversion efficiency of "electric field energy - adsorption energy". The electrostatic adsorption mechanism charges and adsorbs and separates the particulate impurities and moisture in the oil, and cooperates with a strongly polar adsorbent to adsorb the deteriorated acidic products in the oil, improving the filtration and purification effect.

[0073] The foregoing has shown and described the basic principles, main features and advantages of the present invention. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0074] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An electrostatic adsorption type oil filtering system, comprising a filtering tank (1), a top cover (2), an insulating separation barrel (3), a filter element (4) and an electrostatic adsorption mechanism, characterized in that: The lower left end of the filtering tank (1) is fixedly connected with an oil inlet (11), the upper left end of the filtering tank (1) is fixedly connected with an oil outlet (12), a sewage outlet (13) is opened at the lower right end of the filtering tank (1), a lead wire opening (14) is opened at the upper right end of the filtering tank (1), flange plates (15) are fixedly arranged at both the upper and lower ends of the filtering tank (1), and a positioning seat (16) is arranged in the middle of the inner bottom of the filtering tank (1); A convex structure (22) is arranged at the top of the top cover (2), an extension ring (21) is fixedly arranged downward at the inner end of the bottom of the top cover (2), and the top cover (2) is installed at the upper end of the flange plate (15); The filter element (4) is arranged inside the insulating partition barrel (3), a fixed shaft (41) is fixedly arranged in the middle of the filter element (4), and the bottom of the fixed shaft (41) extends downward and is installed inside the positioning seat (16); The electrostatic adsorption mechanism is arranged above the insulating partition barrel (3) and installed above the filter element (4); The electrostatic adsorption mechanism is a cross-shaped covering electrostatic adsorption mechanism (6), and the cross-shaped covering electrostatic adsorption mechanism (6) includes a cross-shaped covering member (61), a support plate (62), a fixed disk (63), a fixed ring (64) and a second electrostatic adsorption mechanism. The fixed rings (64) are circular ring structures with different diameters and are sequentially distributed inside the fixed disk (63). The support plates (62) are fixedly distributed on the outer side wall of the cross-shaped covering member (61), and the support plates (62) are fixedly arranged at the upper ends of the fixed disk (63) and the fixed ring (64). A sliding groove (621) is opened inside the support plate (62), and the second electrostatic adsorption mechanism is slidably connected to the sliding groove (621) and extends downward through the gap of the fixed ring (64); The second electrostatic adsorption mechanism is composed of a power supply wire two (65), a power connection wire (66), a support (67), an electrode plate (672), a positioning plate (68) and a limiting sliding plate (682). The electrode plate (672) contacts the inner wall of the metal partition cylinder (42). The power connection wire (66) is electrically connected to the upper end of the support (67). The lower end of the power supply wire two (65) is electrically connected with a connector (651), and the upper part of the power connection wire (66) is inserted and installed at the front and rear ends of the connector (651).

2. The electrostatic adsorption type oil filtering system according to claim 1, characterized in that: Threading openings (31) are symmetrically arranged near the upper end of the insulating partition barrel (3). An insulating support plate (32) is fixedly arranged at the bottom of the insulating partition barrel (3). A through hole (321) is opened in the middle of the insulating support plate (32), and fixing grooves (322) are uniformly opened and distributed at the upper end of the insulating support plate (32); 3. The electrostatic adsorption type oil filtering system according to claim 1, characterized in that: The filter element (4) includes a metal partition cylinder (42) and a folded filter paper structure (43). The metal partition cylinders (42) are sequentially sleeved and distributed in multiple sets of cylindrical structures, and the folded filter paper structures (43) are respectively filled between the metal partition cylinders (42); The metal spacer tube (42) is made of stainless steel material. The folded filter paper structure (43) uses DMD insulating paper. The thickness of the metal spacer tube (42) is 0.8 mm; The folded filter paper structure (43) is serrated and the creases extend in the vertical direction. The voids of the folded filter paper structure (43) are filled with a strongly polar adsorbent material, and the strongly polar adsorbent material is a strongly polar macroporous spherical molecular sieve adsorbent.

4. An electrostatic adsorption type oil filtering system according to claim 1, characterized in that: The positioning plate (68) has a symmetrical structure and an installation plate (681) is fixedly provided at the inner end. The installation plate (681) is butt-joint installed at the middle of the sliding groove (621). The limiting sliding plate (682) is fixedly provided at the outer end of the positioning plate (68) and is limited to slide to the front and rear ends of the support plate (62). The support (67) is fixedly provided at the outer end of the limiting sliding plate (682). A third support rod (671) is fixedly provided at the bottom of the support (67). The electrode plate (672) is fixedly provided at the bottom of the third support rod (671).

5. The electrostatic adsorption type oil filtering system according to claim 4, wherein: Locking bolts (6811) and locking nuts (6812) are distributed through connection at both ends of the installation plate (681); A support plate (69) is fixedly provided below the side of the limiting sliding plate (682) at one end. A transfer plate (691) is fixedly provided at the inner end of the support plate (69). A fixing cylinder (692) is fixedly penetrated through the middle of the transfer plate (691). An adjusting screw rod (693) is connected through the thread inside the fixing cylinder (692). A rotating plate (694) is fixedly provided at the upper end of the adjusting screw rod (693). The bottom of the adjusting screw rod (693) has a rounded corner structure.

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