An oil extraction device for petroleum residues

Abstract

The present invention relates to the technical field of oil separation and recovery, and discloses an oil extraction device for oil residues, comprising a first conveyor belt and a second conveyor belt; the second conveyor belt is located above the middle section of the first conveyor belt; the oil residue is conveyed while being clamped between the first conveyor belt and the second conveyor belt; the outer ring side of the first conveyor belt is provided with an oil-absorbing felt layer; the linear speeds of the first conveyor belt and the second conveyor belt are different; a plurality of extrusion roller groups are arranged in the middle section of the lower wall of the first conveyor belt, and an oil collecting hopper for collecting oil is arranged below the first conveyor belt; the present invention conveys and adsorbs the oil on the surface of the oil residue through the first conveyor belt with an oil-absorbing felt layer, and extrudes the oil absorbed by the oil-absorbing felt layer through the extrusion roller groups, so as to realize rapid and efficient oil separation and extraction during the conveying of the oil residue; and through the second conveyor belt with different rotation speeds, not only can the contact between the oil residue and the oil-absorbing felt layer be promoted, but also the oil residue can be turned over to make all its surfaces fully contact with the oil-absorbing felt layer, thereby improving the oil extraction rate.

Description

Technical Field

[0001] The present invention relates to the technical field of oil separation and recovery, and particularly relates to an oil extraction device for oil residues. Background Art

[0002] Oil is a viscous, dark brown liquid, known as the "blood of industry". The main components are mixtures of various alkanes, cycloalkanes, and aromatic hydrocarbons, which are soluble in a variety of organic solvents, insoluble in water, but can form emulsions with water. Oil extraction mainly includes exploration, drilling, oil production, etc. First, the storage location and reserves of oil are determined through geological exploration, then drilling operations are carried out to connect the oil layer with the ground, and finally, various oil production technologies are used to extract oil from underground. Common oil production methods include natural flow production, mechanical oil production, etc.

[0003] A large amount of residues exist in the extracted oil, and the surface of the filtered residues still adheres to oil. A large amount of the extracted oil residues are discarded, reducing the oil extraction rate. In the prior art, a patent with the publication number CN111375465B, an oil extraction device for oil residues, first crushes the oil residues, then injects clear water into the crushing box, and then extracts the oil from the residues by stirring, using the principle that oil is immiscible with water and has a density less than that of water. This process has many steps, low efficiency, and will cause some oil to form emulsions with water, resulting in more impurities in the extracted oil. A patent with the publication number CN116651043A, an oil extraction device for oil residues, stores the oil residues in sections in the treatment cylinder, allows the oil to precipitate out statically, and cooperates with a stirring component to stir, so that the precipitated oil can fall smoothly and be discharged; however, the process of static precipitation of oil is relatively slow, and stirring causes the residues to re-adhere to the oil, resulting in insufficient oil extraction and low extraction rate. Summary of the Invention

[0004] The purpose of the present invention is to solve at least one of the above problems in the prior art and provide an oil extraction device for oil residues.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] An oil extraction device for oil residues includes a first conveyor belt and a second conveyor belt; the second conveyor belt is located above the middle section of the first conveyor belt; the oil residues are clamped between the first conveyor belt and the second conveyor belt and conveyed; the outer ring side of the first conveyor belt has an oil-absorbing felt layer; the linear speeds of the first conveyor belt and the second conveyor belt are different; a plurality of extrusion roller groups are provided in the middle section of the lower wall of the first conveyor belt, and the extrusion roller groups squeeze out the oil adsorbed by the oil-absorbing felt layer, and an oil collecting hopper for collecting oil is provided below the first conveyor belt.

[0007] Further, the squeezing roller set includes two squeezing rollers rotatably installed on the upper and lower sides of the lower wall of the first conveyor belt; a scraper for scraping the petroleum on the surface of the squeezing roller is provided below the squeezing roller on the lower side of the lower wall of the first conveyor belt.

[0008] Further, the vertical distance between the second conveyor belt and the first conveyor belt is adjustable.

[0009] Further, it further includes a first support for supporting the rotation of the first conveyor belt; a plurality of hydraulic cylinders are provided on the first support, and the hydraulic cylinders support the vertical lifting of the second conveyor belt.

[0010] Further, the linear velocity of the second conveyor belt is greater than that of the first conveyor belt; the width of the second conveyor belt is smaller than that of the first conveyor belt; the second conveyor belt reciprocates horizontally on the upper side of the first conveyor belt.

[0011] Further, it further includes a transverse movement support frame and a second support for supporting the rotation of the second conveyor belt; the second support is transversely slidably connected to the transverse movement support frame; a rotating cylinder is provided at the end of the second support, and the rotating cylinder rotates with the roller on the inner side of the end of the second conveyor belt; an annular groove is provided on the outer side of the rotating cylinder, and the annular groove includes two symmetrically connected spiral grooves; a guide post extending into the annular groove is provided on the transverse movement support frame.

[0012] Further, the transverse movement support frame is in an inverted U shape, and the second support is located inside the transverse movement support frame; a plurality of transverse movement guide rods are provided through the second support, and the transverse movement guide rods slidably pass through the transverse movement support frame; a limiting plate is connected to the outer end of the transverse movement guide rod, and a spring is connected between the limiting plate and the outer side of the transverse movement support frame.

[0013] Further, an oil scraping groove for scraping the petroleum on the surface of the second conveyor belt is provided on the horizontal side of the second conveyor belt, and two oil baffle plates are connected to the side wall of the oil scraping groove for scraping oil, and the second conveyor belt is correspondingly located between the two oil baffle plates; a guide oil hose is connected between the lower side of the oil scraping groove and an oil collecting hopper.

[0014] Further, the first conveyor belt includes a base layer, an oil-absorbing felt layer is coated on the outer side of the base layer, and a sponge layer is provided between the base layer and the oil-absorbing felt layer; a plurality of air bag groups are provided in the sponge layer, and each air bag group includes two air bags spaced apart along the rotation direction of the first conveyor belt and an air pipe connecting the two air bags.

[0015] Further, a plurality of exhaust air bag groups are uniformly arranged along the rotation direction of the first conveyor belt, and each row of air bag groups corresponds horizontally; adjacent rows of air bag groups are arranged alternately horizontally, and each air bag group in adjacent rows has one air bag corresponding horizontally.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0017] The present invention transports and adsorbs the petroleum on the surface of petroleum residues through a first conveyor belt with an oil-absorbing felt layer, extrudes the absorbed petroleum from the oil-absorbing felt layer through an extrusion roller group, and is provided with a scraper for scraping the petroleum on the surface of the extrusion roller group. The oil-absorbing felt layer circulates to absorb and discharge oil, realizing rapid and efficient separation and extraction of petroleum during the transportation of petroleum residues.

[0018] Through a second conveyor belt with different rotation speeds, the present invention can not only promote the contact between petroleum residues and the oil-absorbing felt layer, but also make the petroleum residues turn over, enabling all sides of them to come into full contact with the oil-absorbing felt layer, thereby improving the petroleum extraction rate.

[0019] The vertical distance between the first conveyor belt and the second conveyor belt of the present invention is adjustable, which can ensure the contact between the oil-absorbing felt layer and petroleum residues and adapt to petroleum residues of different batches and different particle sizes.

[0020] The present invention has a sponge layer inside the oil-absorbing felt layer. The sponge layer can temporarily store and absorb petroleum, increasing the oil absorption and temporary storage capacity, and having a stronger elastic deformation ability. It can better adapt to wrapping petroleum residues and the adjustment of the vertical distance between conveyor belts, ensuring the transportation and turning over of petroleum residues.

[0021] The second conveyor belt of the present invention can move horizontally in a reciprocating manner. With a rotational speed difference, the two conveyor belts can only make the petroleum residues turn over in the conveying direction, while the reciprocating horizontal movement of the second conveyor belt enables the petroleum residues to turn over horizontally, further improving the full contact between the petroleum residues and the oil-absorbing felt layer, adapting to various irregularly shaped petroleum residues, and increasing the extraction rate.

[0022] The present invention adopts an airbag group arranged in a staggered manner. When the airbag group formed by two connected airbags passes through the extrusion roller, one is compressed and the other expands, causing the sponge layer and the oil-absorbing felt layer to quickly fluff and recover under the action of the airbag expansion, rapidly restoring a strong oil absorption capacity, avoiding a serious decline in the oil absorption capacity after the oil absorption structure is compacted, and meeting the requirements of rapid cyclic oil absorption and discharge. Description of the Drawings

[0023] Figure 1 It is a schematic perspective view of the first perspective of the present invention.

[0024] Figure 2 It is a schematic perspective view of the second perspective of the present invention.

[0025] Figure 3 It is a schematic internal structure view of the present invention.

[0026] Figure 4 It is a schematic extrusion and oil discharge view of the present invention.

[0027] Figure 5 It is a schematic airbag group arrangement view of the present invention.

[0028] Figure 6Schematic three-dimensional structure diagram of the oil collecting hopper of the present invention.

[0029] Figure 7 Schematic three-dimensional structure diagram of the first perspective of the first conveyor belt of the present invention.

[0030] Figure 8 Schematic three-dimensional structure diagram of the second perspective of the first conveyor belt of the present invention.

[0031] Figure 9 Schematic diagram of the second conveyor belt of the present invention and its connection structure.

[0032] Figure 10 is Figure 9 Partial enlarged schematic diagram.

[0033] In the figure: 1. First conveyor belt; 2. Second conveyor belt; 3. Extrusion roller group; 4. Scraper; 5. Oil collecting hopper; 6. Oil scraping groove; 7. Oil baffle; 8. Oil guiding hose; 9. First support; 10. Second support; 11. Hydraulic cylinder; 12. Vertical guiding rod; 13. Transverse moving support frame; 14. Transverse moving guiding rod; 15. Limiting plate; 16. Spring; 17. Rotating cylinder; 18. Annular groove; 19. Guide post; 20. Airbag group; 21. Air pipe; 22. Gear group;

[0034] 101. Base layer; 102. Oil-absorbing felt layer; 103. Sponge layer. Specific embodiments

[0035] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Usually, the components of the embodiments of the present invention described and shown in the accompanying drawings herein can be arranged and designed in various different configurations.

[0036] Specific embodiment 1 of the petroleum extraction device for petroleum residues provided by the present invention:

[0037] Please refer to Figures 1-3 and Figures 6-10 , the petroleum extraction device for petroleum residues includes a first conveyor belt 1, a second conveyor belt 2, a first support 9 for supporting the rotation of the first conveyor belt 1, and a second support 10 for supporting the rotation of the second conveyor belt 2.

[0038] The first conveyor belt 1 and the second conveyor belt 2 both include upper and lower horizontal walls; the first support 9 and the second support 10 both include two vertical side plates, and the side plates are located on both sides of the conveyor belt; rollers for supporting the rotation of the conveyor belt are rotatably installed at the ends of the side plates. Motors for driving the rollers to rotate are installed on the outer sides of both ends of the first support 9 and both ends of the second support 10. That is, in this embodiment, the first conveyor belt 1 is synchronously driven by the motors at both ends; the second conveyor belt 2 is synchronously driven by the motors at both ends.

[0039] Two horizontal cross plates are connected between the two side plates. Among the two cross plates of the first support 9, one is located below the upper wall of the first conveyor belt 1 to support the upper wall of the first conveyor belt 1, and the other cross plate is located in the middle of the inner side of the first conveyor belt 1. The two cross plates of the second support 10 are respectively located below the upper wall of the second conveyor belt 2 and above the lower wall of the second conveyor belt 2, and respectively support the upper and lower horizontal walls of the second conveyor belt 2.

[0040] The first conveyor belt 1 is used for conveying petroleum residues. The upper edge of the side plate of the first support 9 is higher than the upper surface of the upper wall of the first conveyor belt 1. The side plate of the first support 9 is relatively high, so that the petroleum residues conveyed on the upper side of the first conveyor belt 1 do not fall. The lower edge of the side plate of the second support 10 is not lower than the lower surface of the lower wall of the second conveyor belt 2.

[0041] The length of the second conveyor belt 2 is less than that of the first conveyor belt 1. The second conveyor belt 2 is located above the middle section of the first conveyor belt 1. There is a vertical gap between the second conveyor belt 2 and the first conveyor belt 1, and this gap is used for the petroleum residues to pass through. The petroleum residues are conveyed while being clamped between the first conveyor belt 1 and the second conveyor belt 2.

[0042] An oil-absorbing felt layer 102 is provided on the outer ring side of the first conveyor belt 1. The first conveyor belt 1 includes a base layer 101, and the base layer 101 is a rubber conveyor belt. The oil-absorbing felt layer 102 is coated on the outer side of the base layer 101. The oil-absorbing felt layer 102 can be coated on the outer side of the base layer 101 by bonding or sewing. The second conveyor belt 2 is a rubber conveyor belt with a smooth surface and has little adhesion to petroleum, while the oil-absorbing felt layer 102 can adsorb the petroleum inside and absorb the petroleum on the surface of the petroleum residues by contacting the surface of the petroleum residues.

[0043] The second conveyor belt 2 limits the petroleum residues conveyed by the first conveyor belt 1 from the upper side, so that the petroleum residues adhere to the outer side of the oil-absorbing felt layer 102 of the first conveyor belt 1, thereby promoting the contact and friction between the oil-absorbing felt layer 102 and the petroleum residues and absorbing the petroleum on the surface of the petroleum residues.

[0044] In the middle section of the lower wall of the first conveyor belt 1, there are several extrusion roller groups 3. The extrusion roller groups 3 extrude the petroleum adsorbed by the oil-absorbing felt layer 102. The extrusion roller group 3 includes two extrusion rollers rotatably installed on the upper and lower sides of the lower wall of the first conveyor belt 1 respectively; the distance between the two extrusion rollers of the extrusion roller group 3 is relatively small. When the first conveyor belt 1 passes through the two extrusion rollers, it is compressed and its thickness is reduced, and at the same time, the petroleum adsorbed in the oil-absorbing felt layer 102 is extruded; in this embodiment, multiple sets of extrusion roller groups 3 are provided, which can more comprehensively and fully extrude the petroleum in the oil-absorbing felt layer 102. In some embodiments, the distance between the two extrusion rollers of the extrusion roller group 3 gradually decreases along the moving direction of the lower wall of the first conveyor belt 1 to achieve a better oil extrusion effect.

[0045] In this embodiment, the extrusion rollers are rotatably installed on the side plates of the first bracket 9, and the roller shafts of the extrusion rollers extend to the outside through the side plates. One end of the roller shaft of the extrusion roller group 3 is connected with a gear group 22. The gear group 22 includes two meshing gears, so that the two extrusion rollers of the extrusion roller group 3 rotate synchronously and in opposite directions, so that the first conveyor belt 1 can pass through the extrusion roller group 3 smoothly.

[0046] One end of the roller shaft of one extrusion roller in the extrusion roller group 3 is connected with a motor. The motor drives the two extrusion rollers of the extrusion roller group 3 to rotate synchronously and in opposite directions to achieve active extrusion, reduce the resistance during the rotation of the first conveyor belt 1, and avoid the first conveyor belt 1 from being unable to rotate normally due to excessive resistance. The motor of the extrusion roller group 3 provides the power for the extrusion rollers to extrude the first conveyor belt 1, realizing comprehensive and sufficient oil extrusion.

[0047] A scraper 4 for scraping the petroleum on the surface of the extrusion roller is provided below the lower extrusion roller on the lower side of the lower wall of the first conveyor belt 1. The upper side edge of the scraper 4 is attached to the lower surface of the lower extrusion roller, which can scrape the petroleum on the surface of the lower extrusion roller and make it fall, avoiding the petroleum adhered to the lower extrusion roller from contacting the oil-absorbing felt layer 102 again and re-entering the oil-absorbing felt layer 102, and avoiding repeated oil absorption and extrusion.

[0048] An oil collecting hopper 5 for collecting petroleum is provided below the first conveyor belt 1. The oil collecting hopper 5 is conical and connected to the lower side of the side plate of the first bracket 9 of the first conveyor belt 1. The extrusion roller extrudes the petroleum inside the oil-absorbing felt layer 102 and makes it fall, and the scraper 4 scrapes the petroleum on the surface of the lower extrusion roller and makes it fall, which falls into the oil collecting hopper 5 for collection. A drain pipe is connected to the lower side of the oil collecting hopper 5. When carrying out petroleum recovery and extraction production, a container is placed below the oil collecting hopper 5 to collect the petroleum discharged from the oil collecting hopper 5.

[0049] An oil scraping groove 6 for scraping the petroleum on the surface of the second conveyor belt 2 is provided outside the horizontal side end of the second conveyor belt 2. One side wall of the oil scraping groove 6 is in contact with the outer side of the end of the second conveyor belt 2 to achieve oil scraping. The petroleum adhered to the surface of the second conveyor belt 2 enters the oil scraping groove 6 under the scraping action of one side wall of the oil scraping groove 6, thus avoiding the accumulation of petroleum on the surface of the second conveyor belt 2.

[0050] Although the surface of the second conveyor belt 2 is smooth, it will still adhere to petroleum when it comes into contact with petroleum residues. If this part of the petroleum is not scraped off, it will accumulate and re-adhere to the surface of the new petroleum residues being conveyed, resulting in insufficient extraction of petroleum from the surface of the petroleum residues, increasing the pressure of oil absorption and extrusion oil drainage of the first conveyor belt 1. The setting of the oil scraping tank 6 can avoid the occurrence of the above problems.

[0051] Two oil baffle plates 7 are connected to the side wall of the oil scraping tank 6 for scraping oil, and the second conveyor belt 2 is correspondingly located between the two oil baffle plates 7; the two side plates of the second support 10 of the second conveyor belt 2 are respectively connected to the two oil baffle plates 7. The oil baffle plates 7 play a role in supporting the oil scraping tank 6, making the position of the oil scraping tank 6 stable. At the same time, the oil baffle plates 7 are on both sides of the oil scraping position of the oil scraping tank 6, so that the petroleum on the surface of the second conveyor belt 2 enters the oil scraping tank 6, avoiding the overflow and scattering of the scraped petroleum.

[0052] A guide oil hose 8 is connected between the lower side of the oil scraping tank 6 and the oil collecting hopper 5. The guide oil hose 8 is set to have a relatively long length, which does not affect the activities of the second conveyor belt 2, the second support 10 and the oil scraping tank 6. The petroleum in the oil scraping tank 6 passes through the guide oil hose 8 and enters the oil collecting hopper 5 for collection, improving the sufficiency of petroleum recovery and extraction. In this embodiment, guide oil hoses 8 are connected to the lower sides of both ends of the oil scraping tank 6.

[0053] The petroleum residues are evenly laid on the upper side of the first conveyor belt 1 and conveyed upstream. The first conveyor belt 1 with the oil absorption felt layer 102 absorbs the petroleum on the surface of the petroleum residues under the cooperation of the second conveyor belt 2 for clamping the petroleum residues. After oil absorption, the first conveyor belt 1 rotates to the lower side and discharges the petroleum into the oil collecting hopper 5 under the extrusion of the extrusion roller group 3. The first conveyor belt 1 rotates cyclically, realizing cyclic oil absorption and oil drainage while conveying the petroleum residues. Compared with the prior art methods of crushing and injecting water that are prone to introducing impurities and the method of static extraction of petroleum, the efficiency of petroleum recovery and extraction is greatly improved, and there are fewer impurities in the extracted petroleum. On the other hand, the petroleum on the smooth surface of the second conveyor belt 2 is scraped off by the oil scraping tank 6, and the petroleum enters the oil collecting hopper 5 through the guide oil hose 8 for unified collection, ensuring the sufficiency of petroleum extraction and reducing the phenomenon of repeated petroleum extraction.

[0054] Specific Embodiment Two of the Petroleum Extraction Device for Petroleum Residues provided by the present invention:

[0055] If the linear speeds of the first conveyor belt 1 and the second conveyor belt 2 are the same, the petroleum residues are clamped between the first conveyor belt 1 and the second conveyor belt 2. During the conveying and moving process of the petroleum residues, only one surface of the petroleum residues contacts the oil absorption felt layer 102 outside the first conveyor belt 1, and the petroleum on the surface of the petroleum residues that does not contact the oil absorption felt layer 102 cannot be effectively absorbed and extracted by the oil absorption felt layer 102.

[0056] Therefore, in this embodiment, the linear speeds of the first conveyor belt 1 and the second conveyor belt 2 are different. Specifically, the linear speed of the second conveyor belt 2 is greater than that of the first conveyor belt 1. In the case of the rated rotational speed of the first conveyor belt 1, this speed setting method results in a relatively high conveying efficiency. In some other embodiments, the linear speed of the second conveyor belt 2 is slightly less than that of the first conveyor belt 1, which will reduce the conveying efficiency, but the oil extraction will be more complete.

[0057] During the process of the first conveyor belt 1 and the second conveyor belt 2 clamping the oil residue to convey the oil residue, due to the faster linear speed of the second conveyor belt 2, the second conveyor belt 2 will move relative to the upper side of the oil residue, driving the oil residue to turn over on the upper side of the first conveyor belt 1. During the conveying process, the second conveyor belt 2 continuously turns over the oil residue on the upper side of the first conveyor belt 1, and different surfaces of the oil residue can contact the oil-absorbing felt layer 102 on the outer surface of the first conveyor belt 1. Therefore, the oil on more surfaces of the outer side of the oil residue is absorbed by the oil-absorbing felt layer 102, and the oil is extracted more comprehensively and completely, improving the oil extraction rate.

[0058] Since the oil-absorbing felt layer 102 is a deformable and compressible flexible material, irregular oil residues can also turn over in the vertical gap between the first conveyor belt 1 and the second conveyor belt 2.

[0059] Specific embodiment three of the oil extraction device for oil residues provided by the present invention:

[0060] In Embodiment 2, by adjusting the speed difference between the first conveyor belt 1 and the second conveyor belt 2, the oil residue can be turned over. However, the turning of the oil residue by the second conveyor belt 2 is unidirectional, that is, the oil residue only turns over in the conveying direction and cannot turn over horizontally in the horizontal direction, that is, it cannot turn over in the direction perpendicular to the conveying direction.

[0061] Therefore, in this embodiment, please refer to Figures 1-2 and Figures 9-10 , the width of the second conveyor belt 2 is smaller than that of the first conveyor belt 1; the second conveyor belt 2 reciprocates horizontally on the upper side of the first conveyor belt 1. The lower side of the second conveyor belt 2 is located between the upper ends of the two side plates of the first bracket 9.

[0062] In this embodiment, a horizontal movement support frame 13 is provided. The horizontal movement support frame 13 is located on the upper side of the first conveyor belt 1, and the second bracket 10 is horizontally slidably connected to the horizontal movement support frame 13; the horizontal cross-section of the horizontal movement support frame 13 is in an inverted U shape, and the second bracket 10 is located inside the horizontal movement support frame 13.

[0063] A plurality of transverse movement guide rods 14 are fixedly passed through the second support 10. The transverse movement guide rods 14 fixedly pass through the two side plates of the second support 10, and the ends of the transverse movement guide rods 14 all slide through the transverse movement support frame 13; a limiting plate 15 is connected to the outer ends of the transverse movement guide rods 14, and the number of the limiting plates 15 is two, which are respectively located on both sides of the transverse movement support frame 13. A spring 16 is connected between the limiting plate 15 and the outer side of the transverse movement support frame 13. The spring 16 is sleeved on the outer side of the end of the transverse movement guide rod 14, and the spring 16 provides buffering for the transverse movement of the second support 10 and the second conveyor belt 2.

[0064] Rotating cylinders 17 are provided at both ends of the second support 10. The rotating cylinders 17 are connected to the rotating rollers of the second conveyor belt 2 and rotate synchronously with the rotating rollers on the inner side of the ends of the second conveyor belt 2; an annular groove 18 is provided on the outer side of the rotating cylinder 17. The annular groove 18 includes two symmetric and connected spiral grooves. The two ends of the two spiral grooves are respectively smoothly connected to form the annular groove 18, and the spiral grooves smoothly change in the axial position while extending in the circumferential direction. Guide posts 19 extending into the annular grooves 18 of the rotating cylinders 17 at both ends are respectively provided at both ends of the transverse movement support frame 13.

[0065] While the second conveyor belt 2 rotates, the rollers at the ends of the second conveyor belt 2 drive the two rotating cylinders 17 to rotate. Since the guide posts 19 are fixed on the transverse movement support frame 13 and extend into the annular groove 18, the position of the annular groove 18 cooperating with the guide posts 19 changes when the rotating cylinder 17 rotates, and thus an axial reciprocating movement is generated when the rotating cylinder 17 rotates. The two rotating cylinders 17 cause the second support 10 and the second conveyor belt 2 to generate a transverse reciprocating movement.

[0066] In this way, when transporting the petroleum residue, the second conveyor belt 2 rotates and moves transversely at the same time; the petroleum residue can be turned transversely. The petroleum residue can be turned in both the conveying direction and transversely, so that all surfaces of the petroleum residue are in full contact with the oil-absorbing felt layer 102, further improving the oil absorption sufficiency of the oil-absorbing felt layer 102, sucking the petroleum adhered to all surfaces of the petroleum residue, further improving the petroleum extraction rate, and reducing the abandonment and waste of petroleum.

[0067] Specific embodiment four of the petroleum extraction device for petroleum residue provided by the present invention:

[0068] The particle sizes of different batches of petroleum residue are different. In order to adapt to petroleum residue with different particle sizes, the vertical distance between the second conveyor belt 2 and the first conveyor belt 1 needs to be adjustable. Therefore, in this embodiment, please refer to Figures 1-2 and Figures 7-8 , the vertical distance between the second conveyor belt 2 and the first conveyor belt 1 is set to be adjustable.

[0069] At the upper end of the side plates of the first support 9, a number of vertical hydraulic cylinders 11 are provided. The hydraulic cylinders 11 support the vertical lifting of the second conveyor belt 2. Specifically, the telescopic end of the hydraulic cylinder 11 is connected to the transverse movement support frame 13. At the upper end of the side plates of the first support 9, a number of vertical guide rods 12 are also provided. The vertical guide rods 12 slide through the lower end of the transverse movement support frame 13 to provide guidance for the vertical lifting of the transverse movement support frame 13. Since the second support 10 is transversely slidably connected to the transverse movement support frame 13, when the transverse movement support frame 13 is lifted or lowered, the second support 10 and the second conveyor belt 2 can be lifted or lowered, thereby adjusting the vertical distance between the second conveyor belt 2 and the first conveyor belt 1.

[0070] Specific embodiment five of the petroleum extraction device for petroleum residues provided by the present invention:

[0071] The elastic compression deformation amount of the oil-absorbing felt layer 102 is relatively small. In this embodiment, please refer to the attached Figure 4 , a sponge layer 103 is provided between the base layer 101 and the oil-absorbing felt layer 102; the sponge layer 103 can be bonded between the base layer 101 and the oil-absorbing felt layer 102. The sponge layer 103 inside the oil-absorbing felt layer 102 has the ability to absorb and store oil. The sponge layer 103 can temporarily store the absorbed oil, improve the oil absorption and temporary storage capacity, and has stronger elastic deformation ability, which can better adapt to wrapping the petroleum residues and adapt to the adjustment of the vertical distance between the first conveyor belt 1 and the second conveyor belt 2 in the fourth embodiment, ensuring the transportation and turning of the petroleum residues.

[0072] Specific embodiment six of the petroleum extraction device for petroleum residues provided by the present invention:

[0073] Since the oil-absorbing felt layer 102 and the sponge layer 103 are cyclically compressed, although the oil-absorbing felt layer 102 and the sponge layer 103 have good elasticity, after long-term cyclic compression, the rebound becomes slower, affecting the subsequent oil absorption ability. Therefore, in this embodiment, please refer to the attached Figures 4-5 , a number of airbag groups 20 are provided inside the sponge layer 103. The airbag group 20 includes two airbags spaced along the rotation direction of the first conveyor belt 1 and an air pipe 21 connecting the two airbags. In this embodiment, a number of exhaust airbag groups 20 are evenly arranged along the rotation direction of the first conveyor belt 1, and each row of airbag groups 20 corresponds horizontally; adjacent rows of airbag groups 20 are arranged alternately horizontally, and each row of airbag groups 20 has one airbag corresponding horizontally.

[0074] Both air bags are filled with sealed and incompletely filled nitrogen gas. The center distance between the two air bags in the air bag group 20 is half of the center distance between two adjacent pressing roller groups 3. When a pressing roller group 3 presses one air bag of the air bag group 20, the gas in the air bag passes through the air pipe 21 and enters the other air bag. The expansion of the air bag drives the surrounding sponge to disperse, and makes the oil-absorbing felt layer 102 away from the base layer 101, so that the first conveyor belt 1 quickly returns to the fluffy state. During the continuous oil absorption and oil drainage by extrusion of the first conveyor belt 1, the air bag cooperates with the pressing roller group 3 to continuously compress and expand the first conveyor belt 1, ensuring that the oil absorption capacity quickly recovers, and can maintain a strong oil absorption capacity for a long time, and inhibits the phenomenon of serious decline in oil absorption capacity caused by the decrease in elastic recovery ability after the oil absorption structure is compacted.

[0075] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still make modifications to the technical solutions recorded in the foregoing embodiments without creative efforts, or make equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An oil extraction device for oil residues, comprising a first conveyor belt (1) and a second conveyor belt (2); characterized in that: The second conveyor belt (2) is located on the upper side of the middle section of the first conveyor belt (1); the petroleum residue is sandwiched between the first conveyor belt (1) and the second conveyor belt (2) for transportation; the first conveyor belt (1) has an oil-absorbing felt layer (102) on its outer ring side; the first conveyor belt (1) and the second conveyor belt (2) have different linear speeds; a plurality of squeezing roller groups (3) are provided on the middle section of the lower wall of the first conveyor belt (1), the squeezing roller groups (3) squeeze out the oil absorbed by the oil-absorbing felt layer (102); and an oil collecting hopper (5) for collecting the oil is provided on the lower side of the first conveyor belt (1); The squeezing roller group (3) comprises two rotatably mounted squeezing rollers respectively located on the upper and lower sides of the lower wall of the first conveyor belt (1); a scraper (4) for scraping off oil from the surface of the squeezing roller is provided on the lower side of the squeezing roller on the lower side of the lower wall of the first conveyor belt (1); The first conveyor belt (1) comprises a base layer (101), the oil-absorbing felt layer (102) is coated on the outside of the base layer (101), and a sponge layer (103) is provided between the base layer (101) and the oil-absorbing felt layer (102); a plurality of airbag groups (20) are provided in the sponge layer (103), and the airbag groups (20) comprise two airbags spaced apart along the rotation direction of the first conveyor belt (1) and an air pipe (21) connecting the two airbags; A plurality of air bag groups (20) are evenly arranged along the rotation direction of the first conveyor belt (1), and each air bag group (20) corresponds to each other laterally; adjacent air bag groups (20) are alternately arranged laterally, and each air bag group (20) in adjacent rows has an air bag corresponding to each other laterally; The linear speed of the second conveyor belt (2) is greater than that of the first conveyor belt (1); the width of the second conveyor belt (2) is smaller than that of the first conveyor belt (1); the second conveyor belt (2) moves back and forth laterally on the upper side of the first conveyor belt (1); It also includes a transverse support frame (13) and a second support frame (10) for supporting the rotation of the second conveyor belt (2); the second support frame (10) is connected to the transverse support frame (13) in a transverse sliding manner; a rotating drum (17) is provided at the end of the second support frame (10), and the rotating drum (17) rotates along with the roller on the inner side of the end of the second conveyor belt (2); an annular groove (18) is provided on the outer side of the rotating drum (17), and the annular groove (18) includes two symmetrical and connected spiral grooves; a guide column (19) is provided on the transverse support frame (13) and extends into the annular groove (18); The transverse support frame (13) is in an inverted U shape, and the second support frame (10) is located inside the transverse support frame (13); the second support frame (10) is penetrated by a plurality of transverse guide rods (14), and the transverse guide rods (14) slide through the transverse support frame (13); the outer ends of the transverse guide rods (14) are connected to limit plates (15), and a spring (16) is connected between the limit plates (15) and the outer side of the transverse support frame (13).

2. The oil extraction device for oil residue according to claim 1, characterized in that: The vertical spacing between the second conveyor belt (2) and the first conveyor belt (1) is adjustable.

3. The oil extraction device for oil residue according to claim 2, characterized in that: It also includes a first bracket (9) for supporting the rotation of the first conveyor belt (1); a plurality of hydraulic cylinders (11) are provided on the first bracket (9), and the hydraulic cylinders (11) support the vertical lifting of the second conveyor belt (2).

4. The oil extraction device for oil residue according to claim 1, characterized in that: An oil scraping groove (6) for scraping oil off the surface of the second conveyor belt (2) is provided on the horizontal side of the second conveyor belt (2); the side wall of the oil scraping groove (6) for scraping oil is connected to two oil baffles (7); the second conveyor belt (2) is located between the two oil baffles (7); an oil guide hose (8) is connected between the lower side of the oil scraping groove (6) and the oil collecting hopper (5).

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