Tar residue solid-liquid separation device

Abstract

The invention relates to the technical field of solid-liquid separation devices, and provides a tar residue solid-liquid separation device which is characterized in that a feeding pipe is arranged at the top of a barrel, and a centrifugal conical net I is rotationally arranged in the barrel in a lifting manner; the second centrifugal conical net is arranged in the first centrifugal conical net in a lifting mode, a material passing interval is formed between the second centrifugal conical net and the inner wall of the first centrifugal conical net, the opening direction of the second centrifugal conical net is opposite to the opening direction of the first centrifugal conical net, and the scraper is arranged in the barrel and provided with a first scraping section and a second scraping section. In the double-conical-net filtering structure, the two conical nets rotate synchronously, openings of the two conical nets are opposite, a material passing interval is formed, solid phase accumulation can be avoided, the scraper blade is abdicated, in the same space, the filtering area is expanded to the inner walls of the two conical nets, the handling capacity can be improved and the energy consumption can be reduced without increasing the size, solid phase adhesion is reduced through the conical net structure, the reverse openings are matched with the scraper blade, and the filtering efficiency is improved. The abutting state of the conical net and the scraper is changed through lifting of the conical net, non-stop cleaning is achieved, the structure is simple, the filtering effect is guaranteed, and stop loss is avoided.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of solid-liquid separation devices, and in particular, to a tar residue solid-liquid separation device. Background Art

[0002] Tar residue is a viscous substance produced during the coking process. It is primarily composed of polycyclic aromatic hydrocarbons (PAHs), benzenes, phenols, naphthalenes, as well as coal dust and coke powder. Tar residue is corrosive and adhesive, and exhibits a certain degree of fluidity at certain temperatures. Improper storage can cause serious pollution to the surrounding environment and groundwater resources, necessitating effective treatment. This process typically involves pretreatment and solid-liquid separation, often using a centrifuge.

[0003] Centrifuges mainly use the centrifugal force field generated by the high-speed rotation of the drum to separate the solid phase from the liquid phase in the suspension. Conical drums are often used to achieve solid-liquid separation. At the same time, due to the guiding effect of the conical filter surface, the solid phase is not easy to adhere to the filter surface. Instead, it can be thrown out from the large end opening of the conical drum to recover the solid phase (tar dry residue) for easy post-processing.

[0004] However, the above-mentioned conical centrifuge has the following disadvantages: in scenarios where the tar residue processing volume is large, blindly increasing the volume of the conical drum to increase the filtration area will cause the equipment to occupy too much space and energy consumption cannot be guaranteed; and regardless of whether it is a backwash form or an external force-driven cleaning structure, the equipment needs to be shut down for cleaning and maintenance after running for a period of time, which will also make the structure more complicated. Summary of the Invention

[0005] To overcome the above-mentioned defects, an embodiment of the present invention provides a tar residue solid-liquid separation device, which solves the technical problem in the related art of how a conical centrifuge can fully utilize the drum filtration area to improve filtration efficiency under the premise of a certain equipment volume, while facilitating non-stop cleaning.

[0006] According to one aspect, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, comprising: A cylinder, wherein a feed pipe is provided on the top of the cylinder; A centrifugal cone net 1, which is rotatable and liftable inside the cylinder; The second centrifugal cone screen is arranged to be lifted and lowered inside the first centrifugal cone screen and can rotate synchronously with the first centrifugal cone screen. A material transfer gap is formed between the second centrifugal cone screen and the inner bottom wall of the first centrifugal cone screen, and the opening direction of the second centrifugal cone screen is opposite to the opening direction of the first centrifugal cone screen. The feed pipe downwardly penetrates the top wall of the second centrifugal cone screen and extends into the second centrifugal cone screen. A scraper, the scraper being arranged in the cylinder, the scraper comprising a scraping section 1 for cleaning the inner circumferential wall of the centrifugal cone net 1 and a scraping section 2 for cleaning the inner circumferential wall of the centrifugal cone net 2; The second centrifugal cone screen has a cleaning state and a filtering state. When the second centrifugal cone screen is in the cleaning state, the first scraping segment abuts against the inner circumferential wall of the first centrifugal cone screen, and the second scraping segment abuts against the inner circumferential wall of the second centrifugal cone screen, so that the scraper scrapes off the solid phase matter. When the centrifugal cone net 2 is in the filtering state, the inner peripheral wall of the centrifugal cone net 1 is separated from the scraping section 1, and the inner peripheral wall of the centrifugal cone net 2 is separated from the scraping section 2 to filter the tar residue.

[0007] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, wherein the cross-sectional area of ​​the centrifugal cone mesh 1 gradually increases from bottom to top, and the opening is arranged upward, the cross-sectional area of ​​the centrifugal cone mesh 2 gradually decreases from bottom to top, and the opening is arranged downward, and the centrifugal cone mesh 1 and the centrifugal cone mesh 2 are arranged coaxially.

[0008] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, in which the feed pipe is lifted and lowered at the top of the cylinder, and the feed pipe has a horizontal section extending horizontally, and the horizontal section is slidably connected to the inner top wall of the centrifugal cone net two, so that the pipe mouth of the feed pipe faces the inner top wall of the centrifugal cone net two, and can drive the centrifugal cone net two to rise and fall.

[0009] For example, in at least one embodiment of the present invention, a tar residue solid-liquid separation device is provided, in which the centrifugal cone mesh 1 rises and can synchronously drive the centrifugal cone mesh 2 to fall, so that the scraping segment 1 abuts against the inner wall of the centrifugal cone mesh 1, and the scraping segment 2 abuts against the inner wall of the centrifugal cone mesh 2.

[0010] For example, in at least one embodiment of the present invention, a tar residue solid-liquid separation device is provided, wherein the inner top wall of the centrifugal cone mesh 2 is further provided with a connecting column that passes through the inner bottom wall of the centrifugal cone mesh 1, and the connecting column is slidably fitted with the centrifugal cone mesh 1, so that the centrifugal cone mesh 2 can follow and rotate synchronously with the centrifugal cone mesh 1.

[0011] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, wherein the outer wall of the connecting column is also sleeved with an elastic member 1, and the two ends of the elastic member 1 are respectively connected to the inner top wall of the centrifugal cone net 1 and the inner bottom wall of the centrifugal cone net 2, so as to provide a force for the centrifugal cone net 1 and the centrifugal cone net 2 to move away from each other and separate from the scraping segment 1 and the scraping segment 2, respectively.

[0012] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, wherein a rotating shaft is rotatably provided in the bottom of the cylinder body and penetrates the inner bottom wall of the centrifugal cone net 1, the top of the rotating shaft has an insertion end, the insertion end is provided with a wedge pull-back portion, and is located between the centrifugal cone net 1 and the centrifugal cone net 2, the top and bottom of the wedge pull-back portion both have pull-back inclined surfaces, the two pull-back inclined surfaces are symmetrically arranged and both have slide grooves, the centrifugal cone net 1 and the centrifugal cone net 2 are respectively slidably connected in the two slide grooves in a one-to-one correspondence; wherein, after the rotating shaft rotates forward until the first centrifugal cone net and the second centrifugal cone net both press against the inner wall of one end of the chute, the first centrifugal cone net and the second centrifugal cone net approach each other and rotate forward along with the rotating shaft; After the rotating shaft is reversed until the first centrifugal cone net and the second centrifugal cone net are pressed against the inner wall of the other end of the chute, the first centrifugal cone net and the second centrifugal cone net move away from each other and rotate inversely with the rotating shaft.

[0013] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, wherein the inner wall of the cylinder has a cylindrical groove, and a limiting ring is provided at an opening of the centrifugal cone net. The limiting ring is nested in the cylindrical groove and slides with the cylinder.

[0014] For example, at least one embodiment of the present invention provides a tar residue solid-liquid separation device, wherein the cylinder body includes an outer cylinder and an inner cylinder arranged in the outer cylinder, the centrifugal cone net is rotated and raised and lowered in the inner cylinder, a liquid recovery chamber is formed between the outer wall of the centrifugal cone net and the inner wall of the inner cylinder, and a solid phase recovery chamber is formed between the outer wall of the inner cylinder and the inner wall of the outer cylinder.

[0015] For example, in at least one embodiment of the present invention, a tar residue solid-liquid separation device is provided, wherein an end cover is provided at the top end of the outer cylinder, the end cover has an exhaust port, and the feed pipe passes through the end cover.

[0016] The beneficial effects of the embodiments of the present invention are: First, a double-cone mesh filtration structure is adopted. Centrifugal cone mesh 1 rotates and rises and falls inside the cylinder, and centrifugal cone mesh 2 rises and falls in coordination with centrifugal cone mesh 1. It can follow the high-speed rotation of centrifugal cone mesh 1 to perform solid-liquid separation. The opening directions of the two are opposite, and a material passing gap is formed between them to avoid solid accumulation between the two, provide a channel for the flow of solid and liquid phases, and make way for the scraper so that it can perform its cleaning function normally. The above structure expands the filtration area of ​​the traditional single conical drum to the inner wall of centrifugal cone mesh 1 and the inner wall of centrifugal cone mesh 2 within the same cylinder space, increasing the effective filtration area per unit volume, ensuring that in scenarios with large processing capacity, there is no need to increase the overall volume of the equipment, thereby reducing energy consumption.

[0017] At the same time, compared with the general cylindrical net structure, the solid phase matter in the cone net structure will be thrown away from the cone net under the action of centrifugal force, rather than adhering to the inner wall of the cone net, which prolongs the cleaning cycle. In addition, the double cone nets with opposite openings can fully utilize all the filtration area under high-speed rotation. That is, after the solid phase matter is separated by the filter surface, it will gradually pass through the material passing interval and finally be thrown out by the centrifugal cone net for unified collection, ensuring the collection function of the solid phase matter, rather than the low utilization rate of the filtration area of ​​the overlapping part like the same-direction openings.

[0018] The double cone mesh can also adopt a filter structure with different filtering capabilities, that is, the filtering effect of the outer cone mesh is stronger than that of the inner cone mesh, so as to further enhance the filtering efficiency and prevent the smaller inner cone mesh from quickly adhering to solid phase matter inside it, thereby affecting the overall filtering effect.

[0019] Secondly, the reverse opening of the double cone screen can cooperate with the scraper to achieve non-stop cleaning. The double cone screen controls the contact state with the scraper by lifting and lowering, and controls the contact state with the scraper under high-speed rotation. Therefore, it can switch freely between the filtering state and the cleaning state without stopping the machine. In the cleaning state, the relative movement between the scraper and the rotating cone screen is used to remove the solid impurities attached to the filter surface in real time and discharge them under the guidance of the cone surface, which not only ensures the cleaning effect, but also avoids the efficiency loss caused by shutdown maintenance. The overall structure is simple and does not require additional complex drive components. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for describing the embodiments of the present invention. Obviously, the drawings described below are merely exemplary embodiments of the present invention. Those skilled in the art can, without inventive effort, derive other drawings based on the contents of the exemplary embodiments of the present invention and these drawings.

[0021] Figure 1 This is a cross-sectional view of a tar residue solid-liquid separation device in one embodiment of the present invention; Figure 2 for Figure 1 A diagram showing a cleaning state of a centrifugal cone screen 2 in the embodiment of the present invention; Figure 3 This is a schematic diagram of the internal structure of the cylinder in another embodiment of the present disclosure; Figure 4 for Figure 3 Enlarged view of part A in the middle; Figure 5 for Figure 3 Schematic diagram of the wedge pullback structure in the embodiment; Figure 6 for Figure 5 Enlarged view of middle part B; Figure 7 for Figure 5 Enlarged view of middle C part; In the figure: 1. Cylinder; 101. Outer cylinder; 102. Inner cylinder; 103. Liquid recovery chamber; 104. Solid phase recovery chamber; 105. Cylindrical trough; 2. Feed pipe; 201. Horizontal section; 3. Centrifugal cone screen 1; 4. Centrifugal cone screen 2; 5. Feeding interval; 6. Scraper; 601. Scraping section 1; 602. Scraping section 2; 7. Rotating shaft; 701. Insertion end; 8. Limiting ring; 10. Connecting column; 11. Elastic member 1; 12. Wedge pull-back portion; 1201. Pull-back inclined plane; 1202. Slide chute; 15. End cover; 1501. Exhaust port; 16. Pipeline; 18. Vertical pole 1; 19. Vertical pole 2. DETAILED DESCRIPTION

[0022] 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, rather than to limit the present invention.

[0023] To simplify the drawings, only the parts relevant to the disclosure are schematically shown in each figure; they do not represent the actual structure of the product. Furthermore, to simplify the drawings and facilitate understanding, in some figures, only one of the components with the same structure or function is schematically shown or labeled. In this document, "one" not only means "only one" but also "more than one," and "several" includes "two" and "more than two."

[0024] It should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they can refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0025] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "up", "down", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1 As shown, it shows a tar residue solid-liquid separation device in one embodiment of the present invention, including a circular cylinder 1 as a frame structure supported as a whole, wherein a feed pipe 2, a centrifugal cone screen 1 3, a centrifugal cone screen 2 4 and a scraper 6 and other components are installed inside the cylinder 102 and the outer cylinder 101 are welded or bolted. The inner cylinder 102 is arranged in the outer cylinder 101, and the centrifugal cone screen 1 3, the centrifugal cone screen 2 4 and the scraper 6 and other components are all installed in the inner cylinder 102, so that the liquid phase material separated and filtered by the cone screen is collected in the inner cylinder 102 (a liquid recovery chamber 103 is formed between the outer wall of the centrifugal cone screen 1 3 and the inner wall of the inner cylinder 102), and finally recovered to the outside of the outer cylinder 101 through the pipe 16 at the bottom end of the inner cylinder 102. The pipe 16 runs through the bottom of the outer cylinder 101 and can be sealed by a flange. At the same time, it is convenient for the outer cylinder 101 (a solid phase recovery chamber 104 is formed between the outer wall of the inner cylinder 102 and the inner wall of the outer cylinder 101) to collect the solid phase material thrown out by the cone net, and finally fall from the bottom of the outer cylinder 101 under the action of its own weight to recover the "dry slag"; furthermore, the top of the outer cylinder 101 can be hinged with an end cover 15, which can be driven by a cylinder, making it convenient for workers to open the cover for maintenance, and provide stable support for the feed pipe 2 that feeds the centrifugal cone net 2 4. The feed pipe 2 can also be sealed with a flange and connected to the end cover 15. The end cover 15 is provided with an exhaust port 1501 to balance the internal and external air pressure and release excess gas in the separation device.

[0029] Regarding the feed pipe 2, it is preferred that the mouth of the feed pipe 2 faces the inner top wall of the centrifugal cone mesh 2 4, so that during the working centrifugation process, the solid phase material first begins to gradually adhere downward from the inner top wall of the centrifugal cone mesh 2 4, making full use of the filtration area of ​​the centrifugal cone mesh 2 4.

[0030] The centrifugal cone screen 1 3 can rotate around its own vertical axis (it can be equipped with an external drive motor and a belt / coupling to transmit power to the central axis of the centrifugal cone screen 1 3; and the lifting can be additionally configured as a whole on a lifting frame; the lifting and rotation drive mechanism of the centrifugal cone screen 2 4 is the same), it adopts a conical cylindrical wire mesh structure, and the cross-sectional area gradually changes along its own vertical axis. The same is true for the centrifugal cone screen 2 4. A material passing gap 5 is formed between the centrifugal cone screen 2 4 and the inner wall of the centrifugal cone screen 1 3 to facilitate the passage of solid and liquid phases and prevent accumulation, and the openings of the two are opposite (it is worth mentioning that the opening of the centrifugal cone screen is generally the end with the largest cross-sectional area, which can have the function of centrifugally throwing out the separated solid phase, hereinafter referred to as the large end); for example, the large end of the centrifugal cone screen 1 3 opens upward, and the large end of the centrifugal cone screen 2 4 opens downward, or the large end of the centrifugal cone screen 1 3 opens downward, and the large end of the centrifugal cone screen 2 4 opens upward.

[0031] Preferably, the large end opening of the centrifugal cone net 1 3 faces upward, and the large end opening of the centrifugal cone net 2 4 faces downward, because the outer centrifugal cone net 1 3 needs to ensure that the solid phase material can be smoothly thrown away for recovery, and it is convenient to connect with the power component without affecting the feeding. In the second method, in order to ensure the function of recovering the solid phase material, there must not be any blocking components around the large end opening of the centrifugal cone net. In order to smoothly connect with the power component, the central axis of the centrifugal cone net 1 3 may interfere with the feed pipe 2 located in the center, thereby complicating the structure.

[0032] In addition, the centrifugal cone net 2 4 can rotate synchronously with the centrifugal cone net 1 3. A through rod can be connected between the two so that no matter which cone net rotates, the other cone net will be driven to rotate synchronously under the action of the through rod, thereby simplifying the driving structure.

[0033] The lifting structure of the centrifugal cone screen 2 4 can also be further simplified, and the feed pipe 2 can be used to drive the centrifugal cone screen 2 4 to rise and fall; specifically, the feed pipe 2 can be fitted at the center of the top end of the cylinder 1 through a threaded lifting mechanism. Since the mouth of the feed pipe 2 is preferably facing the inner bottom wall of the centrifugal cone screen 2 4, a horizontal section 201 of the feed pipe 2 close to the mouth is provided to be slidably connected to the inner bottom wall of the centrifugal cone screen 2 4 (for example, an integrally formed annular protrusion is added to the inner bottom wall of the centrifugal cone screen 2 4, and the annular protrusion is slidably connected to the groove corresponding to the horizontal section 201, and the annular protrusion can be T-shaped or L-shaped, etc.), the scraping section 1 601 is located above the inner wall of the centrifugal cone screen 1 3, and the scraping section 2 602 is located below the inner wall of the centrifugal cone screen 2 4, and then the height of the centrifugal cone screen 2 4 can be adjusted by twisting the feed pipe 2 under an artificial external force to make it drop to the target. The scraper 6 is pressed and further controlled to descend, and finally the scraper segment 1 601 abuts against the inner wall of the centrifugal cone screen 1 3, and the scraper segment 2 602 abuts against the inner wall of the centrifugal cone screen 2 4. During this process, the double cone screens rotate normally (a connecting rod can be welded or disconnected between the centrifugal cone screen 1 3 and the centrifugal cone screen 2 4 so that the centrifugal cone screen 2 4 can normally follow the high-speed rotation of the centrifugal cone screen 1 3), and the cleaning is completed. In addition, in the case of sliding connection, the double cone screen and the scraper 6 (especially the scraper 6) need to have wear-resistant properties, such as using alloy materials to increase the service life. It is further found that the form of sliding connection causes greater wear on the inner bottom wall of the feed pipe 2 and the centrifugal cone screen 2 4 because the contact area of ​​sliding friction is large. In order to reduce wear, increase service life, and normally realize the above-mentioned actions, the sliding connection can be changed to a roller connection.

[0034] Furthermore, regarding the cleaning structure, the scraper 6 is fixed in the cylinder 1, specifically, welded or detached on the inner wall of the inner cylinder 102, and the inclined scraping segment 1 601 and the inclined scraping segment 2 602 are connected thereto in sequence, and the two correspond to the inner walls of the two cone nets respectively. The scraping segment 1 601 is located on the inner side of the inner circumferential wall of the centrifugal cone net 1 3, and the scraping segment 2 602 is located on the inner side of the inner circumferential wall of the centrifugal cone net 2 4. During the centrifugal cleaning process, the relative movement between the scraper 6 and the rotating cone net can be used to remove solid impurities attached to the filter surface in real time and discharge them under the guidance of the cone surface. In order to achieve state switching without stopping the machine, that is, the double cone nets rotate at high speed, the scraper 6 can abut or not abut the double cone nets, so the centrifugal cone net 2 4 is lifted and arranged in the centrifugal cone net 1 3, and an active lifting mechanism (such as a hydraulic cylinder or a screw nut pair) is used. Figure 1 Not explicitly shown), to actively change the distance between the double cone screen and the scraper 6, so as to realize free switching between the filtering state and the cleaning state, and the structure is simple and easy to maintain.

[0035] In order to simplify the overall structure and reduce unnecessary driving structures, the following method can be adopted to change the distance between the double cone nets and the scraper 6: the power component can normally drive one of the cone nets to rotate and rise and fall, and the rise and fall of the cone net will correspondingly drive the other cone net to move in the opposite direction, that is, the double cone nets can synchronously move towards each other or move away from each other. The above process is achieved by the forward and reverse rotation of the power component.

[0036] Specifically, such as Figures 2 to 7 As shown, a gap is created between the horizontal section 201 and the inner bottom wall of the centrifugal cone screen 2 4 to avoid friction. Regarding the drive structure, a vertical rotating shaft 7 (which can be driven by an external motor) is provided in the inner cylinder 102 for rotating the centrifugal cone screen 3. To enable the dual cone screens to move toward or away from each other and be connected to the vertical rotating shaft 7 for normal rotation, the inner bottom wall of the centrifugal cone screen 3 is sleeved on the rotating shaft 7 with a clearance fit, and the large end of the centrifugal cone screen 3 is rotated and lifted in conjunction with the inner wall of the cylinder 1. Specifically, the large end of the centrifugal cone screen 3 can adopt an annular structure (i.e., a limiting ring 8 integrally formed at the opening of the centrifugal cone screen 3), which is embedded in the cylindrical groove 105 on the inner wall of the inner cylinder 102, so that it has the freedom to rotate and rise and fall.

[0037] At the same time, a connection form of connecting column 10 + elastic member 11 is adopted to connect the double cone net, and a vertical connecting column 10 is installed, the top of which is welded or detached to the inner top wall of centrifugal cone net 2 4 and the bottom of which is slidably fitted with the inner bottom wall of centrifugal cone net 3. The outer wall of the vertical connecting column 10 is sleeved with an elastic member 11, and its two ends are respectively connected to the inner bottom wall of centrifugal cone net 1 3 and the inner top wall of centrifugal cone net 2 4 to provide a force for centrifugal cone net 1 3 and centrifugal cone net 2 4 to move away from each other and separate from scraping segment 1 601 and scraping segment 2 602 respectively; in addition, the positions of scraping segment 1 601 and scraping segment 2 602 are fixed, and then under the action of the elastic member 11 and without external force, the centrifugal cone net 1 3 drops to the low position of the cylindrical groove 105, the centrifugal cone net 2 4 rises, and the double cone net is automatically in a filtering state.

[0038] In order to be able to switch to the cleaning state and realize power transmission to connect the vertical rotating shaft 7 and the double cone screen, an arc-shaped wedge pull-back portion 12 (located between the centrifugal cone screen 1 3 and the centrifugal cone screen 2 4) is welded at the insertion end 701 of the top of the vertical rotating shaft 7. The thickness of the wedge pull-back portion 12 gradually changes along its arc path, that is, symmetrical pull-back inclined surfaces 1201 are provided at the top and bottom of the wedge pull-back portion 12. The pull-back inclined surfaces 1201 are connected to the double cone screen through sliding, so that the two are pulled back and abutted against the scraper 6 to change the state.

[0039] Specifically, a vertical rod 18 is welded on the inner bottom wall of the centrifugal cone net 3, and a vertical rod 2 19 is welded at the corresponding position of the inner top wall of the centrifugal cone net 2 4. The two are respectively connected to the slide groove 1202 of the pull-back inclined surface 1201 through a T-shaped block or other similar structure to prevent separation, resulting in the inability to transmit power. It can be achieved that: under the premise that the elastic member 11 opens the double cone net, the vertical shaft 7 rotates forward to drive the wedge block pull-back part 12 to rotate to the inner wall of the left end of the slide groove 1202, and then the guide of the sliding connection and the pull-back inclined surface 1201 is pulled back. The double cone net is pulled back, and the two move toward each other until they abut against the scraper 6. At this time, the vertical shaft 7 continues to rotate forward, which will drive the double cone net to rotate forward in the cleaning state. Subsequently, the vertical shaft 7 reverses and drives the wedge block pull-back portion 12 to rotate to the inner wall of the right end of the slide groove 1202. Under the action of the elastic member 11, the sliding connection and the guide of the pull-back inclined surface 1201, the double cone net is stretched open again, and the two move away from each other until they are separated from the scraper 6. At this time, the vertical shaft 7 continues to reverse, which will drive the double cone net to reverse in the filtering state.

[0040] During the filtration phase of the device, the feed pipe 2 feeds the tar residue into the interior of the centrifugal cone screen 2 4. The power source drives the centrifugal cone screen 1 3 to rotate, and the centrifugal cone screen 2 4 rotates synchronously with it (in the filtration state, the double cone screens are separated from the scraper 6). Under the action of centrifugal force, the liquid phase passes through the double cone screens to the liquid recovery chamber 103 and is discharged through the pipe 16. At the same time, the solid phase is retained, and some of the solid phase is thrown into the solid phase recovery chamber 104 for recovery, while the remaining solid phase adheres to the inner wall of the cone screen.

[0041] Cleaning stage of the device: When the solid phase material attached to the inner wall of the cone screen affects the working efficiency, the double cone screen is controlled to rise and fall, so that the scraping segment 1 601 abuts against the inner wall of the centrifugal cone screen 1 3, and the scraping segment 2 602 abuts against the inner wall of the centrifugal cone screen 2 4. The solid phase material is scraped off by the relative movement of the cone screen and the scraper 6, and is thrown into the solid phase recovery chamber 104 for recovery under the action of centrifugation. After cleaning is completed, it is reset and returns to the filtering state again. There is no need to stop the whole process.

[0042] It should be noted that the above embodiments are only used to illustrate the technical solutions 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 preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A tar residue solid-liquid separation device, characterized in that: include: A cylinder (1), wherein a feed pipe (2) is provided at the top of the cylinder (1); A centrifugal cone net (3) is provided in the cylinder (1) so as to rotate and be lifted and lowered; Centrifugal cone net 2 (4), the centrifugal cone net 2 (4) is lifted and arranged in the centrifugal cone net 1 (3), and can follow the centrifugal cone net 1 (3) to rotate synchronously, a material passing gap (5) is formed between the centrifugal cone net 2 (4) and the inner bottom wall of the centrifugal cone net 1 (3), and the opening direction of the centrifugal cone net 2 (4) is opposite to the opening direction of the centrifugal cone net 1 (3), and the feed pipe (2) passes through the top wall of the centrifugal cone net 2 (4) downward and extends into the centrifugal cone net 2 (4); A scraper (6), the scraper (6) being arranged in the cylinder (1), the scraper (6) comprising a scraper section 1 (601) for cleaning the inner peripheral wall of the centrifugal cone net 1 (3) and a scraper section 2 (602) for cleaning the inner peripheral wall of the centrifugal cone net 2 (4); The centrifugal cone screen 2 (4) has a cleaning state and a filtering state. When the centrifugal cone screen 2 (4) is in the cleaning state, the scraping section 1 (601) abuts against the inner peripheral wall of the centrifugal cone screen 1 (3), and the scraping section 2 (602) abuts against the inner peripheral wall of the centrifugal cone screen 2 (4), so that the scraper (6) scrapes off the solid phase material. When the centrifugal cone net 2 (4) is in the filtering state, the inner peripheral wall of the centrifugal cone net 1 (3) is separated from the scraping section 1 (601), and the inner peripheral wall of the centrifugal cone net 2 (4) is separated from the scraping section 2 (602) to filter the tar residue.

2. A tar residue solid-liquid separation device according to claim 1, characterized in that: The cross-sectional area of ​​the centrifugal cone net 1 (3) gradually increases from bottom to top, and the opening is arranged upward, the cross-sectional area of ​​the centrifugal cone net 2 (4) gradually decreases from bottom to top, and the opening is arranged downward, and the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) are coaxially arranged.

3. A tar residue solid-liquid separation device according to claim 2, characterized in that: The feed pipe (2) is arranged at the top of the cylinder (1) for lifting. The feed pipe (2) has a horizontal section (201) extending horizontally. The horizontal section (201) is slidably connected to the inner top wall of the second centrifugal cone net (4) so ​​that the pipe mouth of the feed pipe (2) faces the inner top wall of the second centrifugal cone net (4) and can drive the second centrifugal cone net (4) to rise and fall.

4. A tar residue solid-liquid separation device according to claim 2, characterized in that: After the centrifugal cone net 1 (3) rises, it can synchronously drive the centrifugal cone net 2 (4) to fall, so that the scraping section 1 (601) abuts against the inner wall of the centrifugal cone net 1 (3), and the scraping section 2 (602) abuts against the inner wall of the centrifugal cone net 2 (4).

5. The tar residue solid-liquid separation device according to claim 4, characterized in that: A connecting column (10) is also provided on the inner top wall of the centrifugal cone net 2 (4) and passes through the inner bottom wall of the centrifugal cone net 1 (3), and the connecting column (10) is slidably fitted with the centrifugal cone net 1 (3) so that the centrifugal cone net 2 (4) can follow and rotate synchronously with the centrifugal cone net 1 (3).

6. The tar residue solid-liquid separation device according to claim 5, characterized in that: The outer wall of the connecting column (10) is also provided with an elastic member 1 (11), and the two ends of the elastic member 1 (11) are respectively connected to the inner top wall of the centrifugal cone net 1 (3) and the inner bottom wall of the centrifugal cone net 2 (4) in a one-to-one correspondence, so as to provide a force for the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) to move away from each other and to separate from the scraping segment 1 (601) and the scraping segment 2 (602).

7. The tar residue solid-liquid separation device according to claim 6, characterized in that: The bottom of the cylinder (1) is provided with a rotating shaft (7) which penetrates the inner bottom wall of the centrifugal cone net 1 (3), and the top of the rotating shaft (7) has an insertion end (701), and the insertion end (701) is provided with a wedge pull-back portion (12) and is located between the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4), and the top and bottom of the wedge pull-back portion (12) both have pull-back inclined surfaces (1201), and the two pull-back inclined surfaces (1201) are symmetrically arranged and both have sliding grooves (1202), and the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) are respectively slidably connected in the two sliding grooves (1202); wherein, after the rotating shaft (7) rotates forward until the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) are both pressed against the inner wall of one end of the chute (1202), the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) approach each other and rotate forward following the rotating shaft (7); After the rotating shaft (7) is reversed until the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) are both pressed against the inner wall of the other end of the slide groove (1202), the centrifugal cone net 1 (3) and the centrifugal cone net 2 (4) move away from each other and reverse along with the rotating shaft (7).

8. The tar residue solid-liquid separation device according to claim 4, characterized in that: The inner wall of the cylinder (1) has a cylindrical groove (105), and a limiting ring (8) is provided at the opening of the centrifugal cone net (3). The limiting ring (8) is nested in the cylindrical groove (105) and is slidably matched with the cylinder (1).

9. The tar residue solid-liquid separation device according to claim 1, characterized in that: The cylinder (1) comprises an outer cylinder (101) and an inner cylinder (102) arranged in the outer cylinder (101); the centrifugal cone net (3) is arranged in the inner cylinder (102) to rotate and rise and fall; a liquid recovery chamber (103) is formed between the outer wall of the centrifugal cone net (3) and the inner wall of the inner cylinder (102); and a solid phase recovery chamber (104) is formed between the outer wall of the inner cylinder (102) and the inner wall of the outer cylinder (101).

10. The tar residue solid-liquid separation device according to claim 9, characterized in that: An end cover (15) is provided at the top end of the outer cylinder (101), the end cover (15) having an exhaust port (1501), and the feed pipe (2) passes through the end cover (15).

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