Petroleum extraction device for petroleum residues

Abstract

The invention relates to the technical field of petroleum separation and recovery, and discloses a petroleum residue petroleum extraction device which comprises a first conveying belt and a second conveying belt. The second conveying belt is located on the upper side of the middle section of the first conveying belt. Petroleum residues are clamped between the first conveying belt and the second conveying belt to be conveyed. An oil absorption felt layer is arranged on the outer ring side of the first conveying belt; the first conveying belt and the second conveying belt are different in linear speed; a plurality of extrusion roller sets are arranged in the middle of the lower wall of the first conveying belt. An oil collecting hopper for collecting petroleum is arranged on the lower side of the first conveying belt. Petroleum on the surfaces of petroleum residues is conveyed and adsorbed through the first conveying belt with the oil absorption felt layer, the petroleum absorbed by the oil absorption felt layer is extruded out through the extrusion roller set, and rapid and efficient petroleum separation and extraction in the petroleum residue conveying process are achieved; through the second conveying belt with different rotating speeds, the contact between the petroleum residues and the oil absorption felt layer can be promoted, and the petroleum residues can be turned over, so that each surface of the petroleum residues is in full contact with the oil absorption felt layer, and the petroleum extraction rate is increased.

Description

Technical Field

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

[0002] Petroleum is a viscous, dark brown liquid, known as the "blood of industry". Its main components are a mixture of various alkanes, cycloalkanes, and aromatic hydrocarbons. It is soluble in a variety of organic solvents, insoluble in water, but can form an emulsion with water. Petroleum extraction mainly includes exploration, drilling, and oil production. First, the location and reserves of petroleum are determined through geological exploration, then drilling operations are carried out to connect the oil layer to the ground, and finally various oil production technologies are used to extract oil from underground. Common oil production methods include self-flowing oil production and mechanical oil production.

[0003] There is a lot of residue in the mined petroleum, and the surface of the filtered residue still adheres to the oil. A large amount of mined petroleum residue is abandoned, which reduces the oil recovery rate. In the prior art, the patent with the publication number CN111375465B is a petroleum extraction device for petroleum residues. The petroleum residues are first crushed, and then clean water is injected into the crushing box, and then the petroleum is extracted from the residues by stirring, using the principle that petroleum and water are incompatible and the density is less than that of water. This process has many steps and low efficiency, and it will cause part of the petroleum to form an emulsion with water, and the extracted petroleum impurities are more. The patent with the publication number CN116651043A is a petroleum extraction device for petroleum residues. The petroleum residues are stored in a treatment cylinder in sections, and the petroleum is precipitated by standing, and the stirring component is used to stir, so that the precipitated petroleum falls and is discharged smoothly; but the process of standing and precipitating the petroleum is relatively slow, and the stirring causes the residue to adhere to the petroleum again, so the petroleum extraction is insufficient and the extraction rate is low. Summary of the invention

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

[0005] To achieve the above object, the present invention provides the following technical solutions: A device for extracting oil from petroleum residues comprises a first conveyor belt and a second conveyor belt; the second conveyor belt is located on the upper side of the middle section of the first conveyor belt; the petroleum residues are clamped between the first conveyor belt and the second conveyor belt for transportation; the first conveyor belt has an oil-absorbing felt layer on the outer ring side; the first conveyor belt and the second conveyor belt have different linear speeds; a plurality of squeezing roller groups are provided in the middle section of the lower wall of the first conveyor belt, the squeezing roller groups squeeze out the oil absorbed by the oil-absorbing felt layer, and an oil collecting hopper is provided on the lower side of the first conveyor belt for collecting the oil.

[0006] Furthermore, the squeezing roller group includes two rotatably mounted squeezing rollers respectively located on the upper and lower sides of the lower wall of the first conveyor belt; a scraper for scraping off oil on the surface of the squeezing roller is provided on the lower side of the squeezing roller on the lower wall of the first conveyor belt.

[0007] Furthermore, the vertical distance between the second conveyor belt and the first conveyor belt is adjustable.

[0008] Furthermore, it also includes a first bracket for supporting the rotation of the first conveyor belt; the first bracket is provided with a plurality of hydraulic cylinders, and the hydraulic cylinders support the vertical lifting of the second conveyor belt.

[0009] Furthermore, the linear speed 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; and the second conveyor belt moves back and forth laterally on the upper side of the first conveyor belt.

[0010] Furthermore, it also includes a transverse support frame and a second support supporting the rotation of the second conveyor belt; the second support is connected to the transverse support frame in a transverse sliding manner; a rotating drum is provided at the end of the second support, and the rotating drum 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 drum, and the annular groove includes two symmetrical and connected spiral grooves; a guide column extending into the annular groove is provided on the transverse support frame.

[0011] Furthermore, the transverse support frame is in an inverted U shape, and the second bracket is located on the inner side of the transverse support frame; the second bracket is penetrated by a plurality of transverse guide rods, and the transverse guide rods slide through the transverse support frame; the outer end of the transverse guide rod is connected to a limit plate, and a spring is connected between the limit plate and the outer side of the transverse support frame.

[0012] Furthermore, an oil scraper groove for scraping off the oil on the surface of the second conveyor belt is provided on the horizontal side of the second conveyor belt, and the side wall of the oil scraper groove is connected to two oil baffles, and the second conveyor belt corresponds to between the two oil baffles; an oil guide hose is connected between the lower side of the oil scraper groove and the oil collecting hopper.

[0013] Furthermore, the first conveyor belt includes a base layer, the oil-absorbing felt layer is coated on the outside of the base layer, and a sponge layer is provided between the base layer and the oil-absorbing felt layer; a plurality of airbag groups are provided in the sponge layer, and the airbag groups include two airbags spaced apart along the rotation direction of the first conveyor belt and an air pipe connecting the two airbags.

[0014] Furthermore, a plurality of airbag groups are evenly arranged along the rotation direction of the first conveyor belt, and each row of airbag groups corresponds laterally; adjacent airbag groups are alternately arranged laterally, and each airbag group in adjacent rows has an airbag corresponding laterally.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses a first conveyor belt with an oil-absorbing felt layer to transport and absorb oil on the surface of petroleum residues, squeezes out the oil absorbed by the oil-absorbing felt layer through a squeezing roller group, and is provided with a scraper for scraping off the oil on the surface of the squeezing roller group. The oil-absorbing felt layer cyclically absorbs and discharges oil, thereby realizing rapid and efficient oil separation and extraction during the transportation of petroleum residues. The invention not only promotes the contact between the petroleum residue and the oil-absorbing felt layer by using the second conveyor belt with different rotation speeds, but also turns the petroleum residue so that each surface thereof is in full contact with the oil-absorbing felt layer, thereby improving the oil extraction rate. The vertical spacing between the first conveyor belt and the second conveyor belt of the present invention is adjustable, which can ensure the contact of the oil-absorbing felt layer with the petroleum residue and adapt to different batches of petroleum residues with different particle sizes; The present invention has a sponge layer inside the oil-absorbing felt layer, which can temporarily store and absorb oil, increase the temporary storage capacity of oil absorption, and has stronger elastic deformation ability, can better adapt to wrapping oil residues, and adapt to the vertical spacing adjustment between conveyor belts, so as to ensure the transportation and turning of oil residues; The second conveyor belt of the present invention can reciprocate laterally, and the two conveyor belts with a speed difference can only make the petroleum residue flip in the conveying direction. The reciprocating transverse movement of the second conveyor belt can make the petroleum residue flip laterally, further improving the full contact between the petroleum residue and the oil-absorbing felt layer, adapting to various irregular shapes of petroleum residues, and improving the extraction rate; The present invention adopts an airbag group arranged in a staggered manner. When the airbag group formed by two connected airbags passes through the squeezing roller, one is compressed and the other is expanded, so that the sponge layer and the oil-absorbing felt layer are quickly fluffed and restored under the action of the airbag expansion, and the strong oil absorption capacity is quickly restored, avoiding a serious decrease in the oil absorption capacity after the oil absorption structure is compacted, and meeting the requirements of rapid cyclic oil absorption and discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure from the first viewing angle of the present invention.

[0017] Figure 2 It is a schematic diagram of the three-dimensional structure from a second viewing angle of the present invention.

[0018] Figure 3 It is a schematic diagram of the internal structure of the present invention.

[0019] Figure 4 It is a schematic diagram of the extrusion oil discharge of the present invention.

[0020] Figure 5 It is a schematic diagram of the arrangement of the airbag group of the present invention.

[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the oil collecting bucket of the present invention.

[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the first conveyor belt of the present invention from a first viewing angle.

[0023] Figure 8 It is a schematic diagram of the three-dimensional structure of the first conveyor belt of the present invention from a second viewing angle.

[0024] Fig. 9 It is a schematic diagram of the second conveyor belt and its connection structure of the present invention.

[0025] Fig.10 for Fig. 9 A partial enlarged schematic diagram.

[0026] In the figure: 1, first conveyor belt; 2, second conveyor belt; 3, extrusion roller group; 4, scraper; 5, oil collecting bucket; 6, scraper oil groove; 7, oil baffle plate; 8, oil guide hose; 9, first bracket; 10, second bracket; 11, hydraulic cylinder; 12, vertical guide rod; 13, lateral support frame; 14, lateral guide rod; 15, limit plate; 16, spring; 17, rotating drum; 18, annular groove; 19, guide column; 20, air bag group; 21, air pipe; 22, gear group; 101. base layer; 102. oil-absorbing felt layer; 103. sponge layer. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with 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 embodiments described are only part of the embodiments of the present invention, rather than all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Specific embodiment 1 of the petroleum extraction device for petroleum residue provided by the present invention: Please refer to the attached Figure 1-3 and Figure 6-10 The oil extraction device for oil residues comprises a first conveyor belt 1, a second conveyor belt 2, a first bracket 9 for supporting the first conveyor belt 1 to rotate, and a second bracket 10 for supporting the second conveyor belt 2 to rotate.

[0029] The first conveyor belt 1 and the second conveyor belt 2 each include two upper and lower horizontal walls; the first bracket 9 and the second bracket 10 each include two vertical side panels, which are located on both sides of the conveyor belt; rollers that support the conveyor belt rotation are rotatably installed at the ends of the side panels. Motors that drive the rollers to rotate are installed at both ends of the first bracket 9 and the outer sides of both ends of the second bracket 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.

[0030] Two horizontal cross plates are connected between the two side plates. Of the two cross plates of the first bracket 9, one is located at the lower side of 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 at the middle of the inner side of the first conveyor belt 1. The two cross plates of the second bracket 10 are respectively located at the lower side of the upper wall of the second conveyor belt 2 and the upper side of the lower wall of the second conveyor belt 2, and support the upper and lower horizontal walls of the second conveyor belt 2 respectively.

[0031] The first conveyor belt 1 is used to convey petroleum residues. The upper edge of the side plate of the first bracket 9 is higher than the upper side of the upper wall of the first conveyor belt 1. The side plate of the first bracket 9 is relatively high so that the petroleum residues conveyed on the upper side of the first conveyor belt 1 will not fall off. The lower edge of the side plate of the second bracket 10 is not lower than the lower side of the lower wall of the second conveyor belt 2.

[0032] The length of the second conveyor belt 2 is smaller than that of the first conveyor belt 1. The second conveyor belt 2 is located on the upper side of 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 the gap is used to allow petroleum residue to pass through. The petroleum residue is clamped between the first conveyor belt 1 and the second conveyor belt 2 for transportation.

[0033] The first conveyor belt 1 has an oil-absorbing felt layer 102 on its outer ring side. The first conveyor belt 1 includes a base layer 101. The base layer 101 is a rubber conveyor belt. The oil-absorbing felt layer 102 is coated on the outside of the base layer 101. The oil-absorbing felt layer 102 can be coated on the outside 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. The oil-absorbing felt layer 102 can adsorb petroleum inside and absorb the petroleum on the surface of the petroleum residue by contacting with the surface of the petroleum residue.

[0034] The second conveyor belt 2 limits the petroleum residue conveyed by the first conveyor belt 1 from the upper side, so that the petroleum residue adheres 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 residue, and absorbing the oil on the surface of the petroleum residue.

[0035] A plurality of squeezing roller groups 3 are provided in 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. The squeezing roller groups 3 include two rotatably mounted squeezing rollers respectively located at the upper and lower sides of the lower wall of the first conveyor belt 1; the distance between the two squeezing rollers of the squeezing roller group 3 is small. When the first conveyor belt 1 passes through the two squeezing rollers, it is compressed and its thickness is reduced, and the oil absorbed in the oil-absorbing felt layer 102 is squeezed out at the same time; in this embodiment, multiple groups of squeezing roller groups 3 are provided to squeeze out the oil in the oil-absorbing felt layer 102 more comprehensively and fully. In some embodiments, the distance between the two squeezing rollers of the squeezing roller group 3 is gradually reduced along the moving direction of the lower wall of the first conveyor belt 1 to achieve a better oil squeezing effect.

[0036] In this embodiment, the squeezing roller is rotatably mounted on the side plate of the first bracket 9, and the roller shaft of the squeezing roller passes through the side plate and extends to the outside. One end of the roller shaft of the squeezing roller group 3 is connected to a gear group 22, and the gear group 22 includes two meshing gears, so that the two squeezing rollers of the squeezing roller group 3 rotate synchronously in opposite directions, so that the first conveyor belt 1 passes through the squeezing roller group 3 smoothly.

[0037] A motor is connected to the other end of the roller shaft of one of the squeezing rollers in the squeezing roller group 3. The motor drives the two squeezing rollers of the squeezing roller group 3 to rotate synchronously in opposite directions, thereby realizing active squeezing, reducing the resistance of the first conveyor belt 1 during rotation, and preventing the first conveyor belt 1 from being unable to rotate normally due to large resistance. The motor of the squeezing roller group 3 provides power for the squeezing roller to squeeze the first conveyor belt 1, thereby realizing comprehensive and sufficient oil squeezing.

[0038] A scraper 4 for scraping off the oil on the surface of the squeezing roller is provided on the lower side of the lower squeezing roller of the lower wall of the first conveyor belt 1. The upper edge of the scraper 4 is attached to the lower surface of the lower squeezing roller, so as to scrape off the oil on the surface of the lower squeezing roller and make it fall, thereby preventing the oil adhered to the lower squeezing roller from contacting the oil absorption felt layer 102 again and re-entering the oil absorption felt layer 102, thereby avoiding repeated oil absorption and squeezing.

[0039] An oil collecting hopper 5 for collecting oil is provided at the lower side of 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 squeezing roller squeezes the oil inside the oil-absorbing felt layer 102 and drops it. The scraper 4 scrapes the oil on the surface of the squeezing roller at the lower side and drops it into the oil collecting hopper 5 for collection. An oil drain pipe is connected to the lower side of the oil collecting hopper 5. When oil recovery and extraction is carried out, a container is placed at the lower side of the oil collecting hopper 5 to collect the oil discharged from the oil collecting hopper 5.

[0040] An oil scraping groove 6 for scraping off the oil on the surface of the second conveyor belt 2 is provided on the outside of 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 scrape off the oil. The oil 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, thereby avoiding the accumulation of oil on the surface of the second conveyor belt 2.

[0041] Although the surface of the second conveyor belt 2 is smooth, oil will adhere to the second conveyor belt 2 when it comes into contact with the petroleum residue. If this part of the oil is not scraped off, it will accumulate and re-adhere to the surface of the new petroleum residue being transported, resulting in insufficient oil extraction from the surface of the petroleum residue, increasing the pressure of the first conveyor belt 1 to absorb and squeeze out the oil. The provision of the oil scraping groove 6 can avoid the occurrence of the above-mentioned problem.

[0042] The side walls of the oil scraping groove 6 for scraping oil are connected to two oil baffles 7, and the second conveyor belt 2 corresponds to between the two oil baffles 7; the two side plates of the second bracket 10 of the second conveyor belt 2 are respectively connected to the two oil baffles 7, and the oil baffles 7 play a role in supporting the oil scraping groove 6 to stabilize the position of the oil scraping groove 6. At the same time, the oil baffles 7 are on both sides of the oil scraping position of the oil scraping groove 6, so that the oil on the surface of the second conveyor belt 2 enters the oil scraping groove 6 to prevent the scraped oil from spilling and scattering.

[0043] An oil guide hose 8 is connected between the lower side of the scraper tank 6 and the oil collecting hopper 5. The oil guide hose 8 is set to be relatively long so as not to affect the movement of the second conveyor belt 2, the second bracket 10 and the scraper tank 6. The oil in the scraper tank 6 passes through the oil guide hose 8 and enters the oil collecting hopper 5 for collection, thereby improving the adequacy of oil recovery and extraction. In this embodiment, the lower sides of both ends of the scraper tank 6 are connected to the oil guide hose 8.

[0044] The petroleum residue is evenly spread on the upper upstream end of the first conveyor belt 1 for transportation. The first conveyor belt 1 with the oil-absorbing felt layer 102 absorbs the oil on the surface of the petroleum residue in cooperation with the second conveyor belt 2 holding the petroleum residue. After absorbing the oil, the first conveyor belt 1 rotates to the lower side, and the oil is discharged into the oil collecting bucket 5 under the squeezing action of the squeezing roller group 3. The first conveyor belt 1 rotates cyclically, and while conveying the petroleum residue, cyclic oil absorption and discharge are achieved. Compared with the prior art method of crushing and water injection, which is easy to introduce impurities, and the method of extracting petroleum by standing, the efficiency of oil recovery and extraction is greatly improved, and the impurities of the extracted petroleum are less. On the other hand, the oil on the smooth surface of the second conveyor belt 2 is scraped off by the oil scraping groove 6, and the oil is sent into the oil collecting bucket 5 for unified collection through the oil guide hose 8, so as to ensure the adequacy of oil extraction and reduce the phenomenon of repeated oil extraction.

[0045] Specific embodiment 2 of the petroleum extraction device for petroleum residue provided by the present invention: If the linear speeds of the first conveyor belt 1 and the second conveyor belt 2 are the same, the petroleum residue is clamped between the first conveyor belt 1 and the second conveyor belt 2. During the transportation and movement of the petroleum residue, only one surface of the petroleum residue is in contact with the oil-absorbing felt layer 102 on the outside of the first conveyor belt 1. The oil on the surface of the petroleum residue that is not in contact with the oil-absorbing felt layer 102 cannot be effectively absorbed and extracted by the oil-absorbing felt layer 102.

[0046] 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. Under the condition of the rated speed of the first conveyor belt 1, this speed setting method makes the conveying efficiency higher. In some other embodiments, the linear speed of the second conveyor belt 2 is slightly less than the linear speed of the first conveyor belt 1, which will reduce the conveying efficiency, but the oil extraction will be more sufficient.

[0047] In the process of the first conveyor belt 1 and the second conveyor belt 2 clamping the petroleum residue and conveying the petroleum residue, since the linear speed of the second conveyor belt 2 is faster, the second conveyor belt 2 will move relative to the upper side of the petroleum residue, driving the petroleum residue to turn over on the upper side of the first conveyor belt 1. During the conveying process, the second conveyor belt 2 causes the petroleum residue on the upper side of the first conveyor belt 1 to continuously turn over, and different multiple surfaces of the petroleum residue can contact the oil-absorbing felt layer 102 on the outer surface of the first conveyor belt 1, so that the oil on more surfaces outside the petroleum residue is absorbed by the oil-absorbing felt layer 102, and the oil is extracted more comprehensively and fully, thereby improving the oil extraction rate.

[0048] Since the oil-absorbing felt layer 102 is made of a deformable and compressible flexible material, irregular petroleum residues can also be turned over in the vertical gap between the first conveyor belt 1 and the second conveyor belt 2 .

[0049] Specific embodiment 3 of the petroleum extraction device for petroleum residue provided by the present invention: In the second embodiment, the petroleum residue can be turned over by adjusting the speed difference between the first conveyor belt 1 and the second conveyor belt 2, but the turning of the petroleum residue by the second conveyor belt 2 is unidirectional, that is, the petroleum residue is turned over only in the conveying direction, and the petroleum residue cannot be turned over horizontally, that is, it cannot be turned over in a direction perpendicular to the conveying direction.

[0050] Therefore, in this embodiment, please refer to the attached Figure 1-2 and Figure 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 moves back and forth laterally 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.

[0051] In this embodiment, a transverse support frame 13 is provided, which is located on the upper side of the first conveyor belt 1, and the second bracket 10 is laterally slidably connected to the transverse support frame 13; the transverse cross-section of the transverse support frame 13 is an inverted U shape, and the second bracket 10 is located on the inner side of the transverse support frame 13.

[0052] The second bracket 10 is fixedly provided with a plurality of transverse guide rods 14, which are fixedly passed through the two side plates of the second bracket 10, and the ends of the transverse guide rods 14 are slidably passed through the transverse support frame 13; the outer ends of the transverse guide rods 14 are connected to the limit plates 15, and the number of the limit plates 15 is two, which are respectively located on both sides of the transverse support frame 13. A spring 16 is connected between the limit plate 15 and the outer side of the transverse support frame 13, and the spring 16 is sleeved on the outer side of the end of the transverse guide rod 14, and the spring 16 provides a buffer for the transverse movement of the second bracket 10 and the second conveyor belt 2.

[0053] The second bracket 10 is provided with a rotating drum 17 at both ends, which is connected to the rotating roller of the second conveyor belt 2 and rotates synchronously with the rotating 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, and the two ends of the two spiral grooves are smoothly connected to form the annular groove 18, and the axial position of the spiral groove changes smoothly while extending the circumference. The two ends of the transverse support frame 13 are provided with guide pillars 19 extending into the annular grooves 18 of the rotating drums 17 at both ends.

[0054] While the second conveyor belt 2 rotates, the rollers at the ends of the second conveyor belt 2 drive the two rotating drums 17 to rotate. Since the guide column 19 is fixed on the transverse support frame 13 and extends into the annular groove 18, the rotation of the rotating drum 17 changes the position of the matching between the annular groove 18 and the guide column 19, thereby causing the rotating drum 17 to produce axial reciprocating movement when rotating. The two rotating drums 17 cause the second bracket 10 and the second conveyor belt 2 to produce lateral reciprocating movement.

[0055] In this way, when transporting petroleum residue, the second conveyor belt 2 rotates and moves back and forth laterally at the same time, which can cause lateral flipping of the petroleum residue. The petroleum residue can be flipped in both the conveying direction and the transverse direction, so that each side of the petroleum residue is in full contact with the oil-absorbing felt layer 102, and the oil absorption of the oil-absorbing felt layer 102 is further improved, and the oil adhering to each side of the petroleum residue is absorbed, thereby further improving the oil extraction rate and reducing the abandonment and waste of oil.

[0056] Specific embodiment 4 of the petroleum extraction device for petroleum residue provided by the present invention: Different batches of petroleum residues have different particle sizes. In order to adapt to different particle sizes of petroleum residues, the vertical spacing between the second conveyor belt 2 and the first conveyor belt 1 needs to be adjustable. Therefore, in this embodiment, please refer to the attached Figure 1-2 and Figure 7-8 The vertical spacing between the second conveyor belt 2 and the first conveyor belt 1 is set to be adjustable.

[0057] A plurality of vertical hydraulic cylinders 11 are provided at the upper end of the side plate of the first bracket 9, and 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 support frame 13. A plurality of vertical guide rods 12 are also provided at the upper end of the side plate of the first bracket 9, and the vertical guide rods 12 slide through the lower end of the transverse support frame 13 to provide guidance for the vertical lifting of the transverse support frame 13; since the second bracket 10 is connected to the transverse support frame 13 by transverse sliding, the transverse support frame 13 is lifted and lowered, and the second bracket 10 and the second conveyor belt 2 are lifted and lowered; thereby adjusting the vertical spacing between the second conveyor belt 2 and the first conveyor belt 1.

[0058] Specific embodiment 5 of the petroleum extraction device for petroleum residue provided by the present invention: The elastic compression deformation of the oil-absorbing felt layer 102 is small. 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 and absorb oil, increase the temporary storage capacity of absorbed oil, and has a stronger elastic deformation ability, which can better adapt to wrapping oil residues, and adapt to the vertical spacing adjustment between the first conveyor belt 1 and the second conveyor belt 2 in the fourth embodiment, so as to ensure the transportation and turning of the oil residues.

[0059] Specific embodiment 6 of the oil extraction device for oil residue provided by the present invention: 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 use of cyclic compression, the rebound becomes slow, affecting the subsequent oil absorption capacity. Figure 4-5 A plurality of airbag groups 20 are arranged in the sponge layer 103. The airbag groups 20 include two airbags spaced apart along the rotation direction of the first conveyor belt 1 and an air tube 21 connecting the two airbags. In this embodiment, a plurality of airbag groups 20 are evenly arranged along the rotation direction of the first conveyor belt 1, and each row of airbag groups 20 corresponds to each other transversely; adjacent airbag groups 20 are alternately arranged transversely, and each airbag group 20 in adjacent rows has one airbag corresponding to each other transversely.

[0060] Both airbags are sealed and incompletely filled with nitrogen. The center distance between the two airbags in the airbag group 20 is half of the center distance between the two adjacent squeezing roller groups 3. When the squeezing roller group 3 squeezes one airbag of the airbag group 20, the gas in the airbag passes through the air tube 21 and enters the other airbag. The expansion of the airbag drives the surrounding sponge to spread out, and the oil-absorbing felt layer 102 is away from the base layer 101, so that the first conveyor belt 1 quickly recovers to a fluffy state. In the process of the first conveyor belt 1 continuously absorbing oil and being squeezed to discharge oil, the airbag cooperates with the squeezing roller group 3 to make the first conveyor belt 1 continuously compressed and expanded to make it fluffy, ensuring that the oil absorption capacity is quickly restored, and a strong oil absorption capacity can be maintained for a long time, and the phenomenon of serious decline in oil absorption capacity caused by the decline in elastic recovery capacity after the oil absorption structure is compacted is suppressed.

[0061] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles 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 clamped between the first conveyor belt (1) and the second conveyor belt (2) for transportation; the outer ring side of the first conveyor belt (1) is provided with an oil-absorbing felt layer (102); the first conveyor belt (1) and the second conveyor belt (2) have different linear speeds; a plurality of squeezing roller groups (3) are provided in the middle section of the lower wall of the first conveyor belt (1), and the squeezing roller groups (3) squeeze out the petroleum absorbed by the oil-absorbing felt layer (102); and an oil collecting hopper (5) for collecting the petroleum is provided on the lower side of the first conveyor belt (1).

2. The oil extraction device for oil residue according to claim 1, characterized in that: 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).

3. 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.

4. The oil extraction device for oil residue according to claim 3, 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).

5. The oil extraction device for oil residue according to claim 1 or 3, characterized in that: 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); and the second conveyor belt (2) moves back and forth laterally on the upper side of the first conveyor belt (1).

6. The oil extraction device for oil residue according to claim 5, characterized in that: It also includes a transverse support frame (13) and a second support frame (10) 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; and a guide column (19) is provided on the transverse support frame (13) and extends into the annular groove (18).

7. The oil extraction device for oil residue according to claim 6, characterized in that: 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).

8. 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).

9. The oil extraction device for oil residue according to claim 1, characterized in that: 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.

10. The oil extraction device for oil residue according to claim 9, characterized in that: 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 laterally; adjacent air bag groups (20) are alternately arranged laterally, and each air bag group (20) in adjacent rows has an air bag that corresponds laterally.

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