A pre-treatment storage system for a tire oil feedstock for a suspended bed hydrogenation

Abstract

The utility model discloses a kind of pretreatment storage systems of tyre oil raw materials for suspension bed hydrogenation, special in tyre oil pretreatment technical field, specifically a kind of pretreatment storage system of tyre oil raw materials for suspension bed hydrogenation, including raw material receiving tank, basket filter, atmospheric dehydration tank, precision filter and storage stirring tank, by the setting of raw material receiving tank, basket filter, atmospheric dehydration tank, precision filter, can be sequentially trapped tyre oil in rubber debris, solid impurities such as metal particles, remove free water and part of emulsified water, intercept small colloid and carbon black particles, effectively avoid subsequent equipment blockage, reactor catalyst deactivation and equipment corrosion risk, while the rotation of initiative lever and stirring plate, cooperate with the bottom scraper of side scraper and initiative lever bottom end, high -efficiently scrape the raw material adhered in the inner wall and bottom of storage stirring tank, avoid waste, prevent tyre oil static stratification and impurity settlement, guarantee raw material preliminary uniformity, meet suspension bed hydrogenation feed requirement.

Description

Technical Field

[0001] This utility model relates to the field of tire oil pretreatment technology, specifically a pretreatment and storage system for tire oil raw materials used in suspended bed hydrogenation. Background Technology

[0002] With the surge in global waste tire generation, the harmless treatment and resource utilization of waste tires have become an urgent environmental issue and a key focus of resource strategy. Pyrolysis technology, as one of the core pathways for waste tire resource utilization, can convert waste tires into recycled products such as tire oil, carbon black, and steel wire. Among these, tire oil, due to its high oil content and high energy density, is considered a highly promising alternative energy source, especially showing broad application prospects in suspended bed hydrogenation processes. Suspended bed hydrotreating is a key technology for the lightening of heavy oils. Its core advantage lies in its ability to process low-quality feedstocks with high viscosity and high impurity content. Through the synergistic effect of hydrogen and catalyst, it cracks and hydrogenates large molecular hydrocarbons in tire oil, converting them into various high-quality clean fuels. However, the composition of tire oil used in suspended bed hydrotreating is extremely complex. Influenced by the composition of waste tire feedstock and pyrolysis process conditions, it not only contains a large amount of olefins, aromatics, and asphaltenes, but also carries a variety of harmful impurities. On the one hand, solid particles such as residual rubber debris, steel fibers, and silt in tire oil, as well as ultrafine carbon black particles and colloidal substances generated during pyrolysis, can cause catalyst bed blockage and catalyst particle wear and deactivation if directly introduced into the hydrotreating reactor, seriously affecting reaction efficiency and equipment operational stability. On the other hand, tire oil generally contains free water and emulsified water. The presence of water will reduce the hydrogen partial pressure in the hydrotreating reaction system, decrease the reaction rate, and cause problems such as equipment internal wall corrosion and pipeline scaling, significantly increasing production risks and maintenance costs. In addition, the physical properties of tire oil used in suspended bed hydrotreating impose stringent requirements on storage and feed stability: the viscosity of tire oil changes significantly with temperature, and it is prone to solidification or a sudden increase in viscosity at low temperatures, resulting in poor fluidity and inability to meet the requirements of continuous feed; moreover, the internal components have large density differences, and stratification is very likely to occur when stored statically for a long time. Heavy components and impurities will settle to the bottom of the storage tank, while light components will float on the top, resulting in extremely poor uniformity of raw materials, which in turn leads to fluctuations in the hydrotreating reaction conditions and unstable product yield and quality.

[0003] Existing tire oil pretreatment and storage systems have many shortcomings: the storage tanks lack targeted stirring and temperature control devices, making it difficult to suppress raw material stratification and impurity sedimentation. Furthermore, a large amount of gum and heavy components easily adhere to the inner wall and bottom of the storage tanks, which not only wastes raw materials but also increases the difficulty of cleaning and maintenance costs of the storage tanks. These problems result in the pretreatment outlet indicators failing to meet the stringent inlet specifications of suspended bed hydrogenation catalysts, severely restricting their large-scale application.

[0004] For example, a tire pyrolysis oil collection and storage device with application number 202410807859.7, while capable of separating and collecting stratified oil and oil-water mixtures with high water content through a processing chamber, a first collection chamber, and a second collection chamber, and automatically separating high-quality and low-quality oil during collection, thus improving functionality, reveals a key technological shortcoming in its practical application: tire pyrolysis oil itself contains a large amount of high-viscosity gums, asphaltenes, and heavy hydrocarbon components. These substances are easily adsorbed and adhered to the processing chamber during storage due to factors such as temperature fluctuations and static settling. The adhesive layer adheres to the inner walls, bottom surface, and corners of the storage tank, and gradually hardens and thickens over time, forming stubborn residues that are difficult to clean. This adhesion problem not only causes raw material loss and reduces oil yield, but also significantly increases the difficulty of cleaning and maintenance costs of the storage tank. Cleaning requires stopping the machine first, soaking in high-temperature solvent for several hours, and then manually scraping off the residue. Each cleaning is time-consuming and labor-intensive, and the solvent consumption and labor costs are high. At the same time, the long-term residual gum and heavy components may oxidize and deteriorate, affecting the quality stability of the subsequently collected oil, further restricting the applicability of the device in large-scale, continuous production scenarios. Utility Model Content

[0005] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a pretreatment and storage system for tire oil feedstock used in suspended bed hydrogenation, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a pretreatment and storage system for tire oil raw materials used in suspended bed hydrogenation, comprising a raw material receiving tank, a basket filter, an atmospheric pressure dehydration tank, a precision filter, and a storage and stirring tank. The storage and stirring tank contains a rotatable drive rod. Multiple stirring plates are evenly arranged on the outer circumference of the drive rod, capable of agitating and pushing the tire oil within the storage and stirring tank upwards. A side scraper is also provided inside the storage and stirring tank, rotating synchronously with the drive rod, with one end of the side scraper abutting against the inner circumference of the storage and stirring tank. A bottom scraper, with one end abutting against the bottom surface of the storage and stirring tank, is fixedly connected to the bottom of the drive rod. A heating element is provided in the middle of the outer circumference of the storage and stirring tank. Multiple self-rotating stirring rods are arranged on the stirring plates along the same vertical line from top to bottom.

[0007] Optionally, a drive motor is fixedly connected to the center of the upper surface of the storage stirring tank, the bottom shaft of the drive motor extends into the storage stirring tank, and the top end of the drive rod is fixedly connected to the bottom shaft of the drive motor.

[0008] Optionally, multiple mounting cylinders are uniformly fixedly connected to the outer circumferential surface of the active rod from top to bottom, and every four adjacent stirring plates are fixedly connected to a mounting cylinder at the same angle.

[0009] Optionally, multiple first connecting rods are fixedly connected to both the upper and lower parts of the active rod, and the end of the first connecting rod away from the active rod is fixedly connected to the side scraper.

[0010] Optionally, the heating component includes a heating tube wound around the middle of the outer circumference of the storage and stirring tank, and a heating isolation ring that can completely enclose the heating tube is fixedly connected to the middle of the outer circumference of the storage and stirring tank, with both the inlet and outlet ends of the heating tube penetrating the heating isolation ring.

[0011] Optionally, multiple driven rods are rotatably connected to the stirring plates along the same vertical line from top to bottom, and multiple stirring rods are respectively fixedly connected to their corresponding driven rods. The inner top of the storage stirring tank is provided with a driving component for driving the driven rods to rotate.

[0012] Optionally, the driving component includes a plurality of second connecting rods fixedly connected to the top of the inner circumferential surface of the storage and stirring tank. An internal gear ring plate is fixedly connected to one end of the plurality of second connecting rods away from the inner circumferential surface of the storage and stirring tank. A gear is fixedly connected to the top end of each of the plurality of driven rods, and the plurality of gears are geared on the inner circumferential surface of the internal gear ring plate.

[0013] (III) Beneficial Effects This invention provides a pretreatment and storage system for tire oil feedstock used in suspended bed hydrogenation, which has the following advantages: 1. The pretreatment and storage system for tire oil feedstock used in suspended bed hydrogenation, through the setup of a feedstock receiving tank, basket filter, atmospheric pressure dehydration tank, and precision filter, can sequentially intercept solid impurities such as rubber debris and metal particles in the tire oil, remove free water and some emulsified water, and intercept fine colloids and carbon black particles. This effectively avoids the risks of subsequent equipment blockage, reactor catalyst deactivation, and equipment corrosion. At the same time, the rotation of the drive rod and stirring plate, in conjunction with the side scraper and the bottom scraper at the bottom of the drive rod, efficiently scrapes off the feedstock adhering to the inner wall and bottom of the storage and stirring tank, avoiding waste, preventing the tire oil from settling and separating, and ensuring the initial homogeneity of the feedstock.

[0014] 2. The pretreatment and storage system for tire oil feedstock used in this suspended bed hydrogenation process, through the installation of heating components, can heat the storage and stirring tank with heating pipes. The heating isolation ring reduces heat loss and stabilizes the temperature of the tire oil within the process range to ensure fluidity. At the same time, the driving rod drives the driven rod to revolve through the stirring plate. The gear at the top of the driven rod meshes with the internal gear ring plate fixed to the second connecting rod to achieve self-rotation, driving the stirring rod to form a multi-dimensional three-dimensional stirring flow field, enhancing the radial and axial mixing of the feedstock, significantly improving the uniformity of the tire oil, and providing stable feedstock for the suspended bed hydrogenation process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a frontal cross-sectional structural diagram of the storage stirring tank of this utility model; Figure 3 This is a schematic diagram of the cooperation structure between the active rod and the stirring plate of this utility model.

[0016] In the diagram: 1. Storage and stirring tank; 2. Driving rod; 3. Heating isolation ring cover; 4. Mounting cylinder; 5. Stirring plate; 6. First connecting rod; 7. Side scraper; 8. Bottom scraper; 9. Driven rod; 10. Stirring rod; 11. Second connecting rod; 12. Internal gear ring plate; 13. Gear; 14. Heating tube. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figures 1 to 3 This utility model provides a technical solution: a pretreatment and storage system for tire oil raw materials used in suspended bed hydrogenation, comprising a raw material receiving tank, a basket filter, an atmospheric pressure dehydration tank, a precision filter, and a storage and stirring tank 1. After receiving self-produced tire oil, the raw material receiving tank sequentially passes the tire oil through the basket filter, atmospheric pressure dehydration tank, and precision filter for pretreatment. The basket filter efficiently removes visible solid impurities such as rubber fragments, metal particles, and silt from the raw material, effectively avoiding the risk of subsequent equipment blockage. The atmospheric pressure dehydration tank is equipped with a heating jacket to control the operating temperature at 100-120℃, specifically removing free water and some emulsified water from the tire oil. The presence of water can reduce hydrogenation reaction efficiency and cause equipment corrosion; this step significantly improves the quality of the raw material. The precision filter further removes fine colloids, carbon black particles, and other fine impurities from the raw material, preventing them from entering the suspended bed hydrogenation reactor and causing catalyst deactivation or pipeline blockage. After system treatment, the tire oil has a water content ≤0.5 wt% and mechanical impurities ≤50 mg kg. -1To meet the inlet specifications of the suspended bed hydrogenation catalyst.

[0019] It should be noted that the raw material receiving tank, basket filter, atmospheric pressure dehydration tank, and precision filter are all existing equipment with high technological maturity, and their working principles will not be described in detail here.

[0020] Please see Figures 1 to 3 The storage and stirring tank 1 is equipped with a rotatable drive rod 2. Multiple stirring plates 5 are evenly arranged on the outer circumference of the drive rod 2 to stir and push the tire oil in the storage and stirring tank 1 upward. The storage and stirring tank 1 is equipped with a side scraper 7 that can rotate synchronously with the drive rod 2, and one end of the side scraper 7 abuts against the inner circumference of the storage and stirring tank 1. The bottom end of the drive rod 2 is fixedly connected to a bottom scraper 8 that abuts against the bottom surface of the storage and stirring tank 1. A heating element is provided in the middle of the outer circumference of the storage and stirring tank 1. Multiple stirring rods 10 that can rotate on their own are arranged on the multiple stirring plates 5 from top to bottom on the same vertical line.

[0021] A drive motor is fixedly connected to the center of the upper surface of the storage stirring tank 1. The bottom shaft of the drive motor extends into the storage stirring tank 1, and the top end of the drive rod 2 is fixedly connected to the bottom shaft of the drive motor. Therefore, when the drive motor is working, its bottom shaft will drive the drive rod 2 to rotate synchronously.

[0022] Please see Figures 2 to 3 Multiple mounting cylinders 4 are evenly fixedly connected to the outer circumference of the active rod 2 from top to bottom, and four adjacent stirring plates 5 are fixedly connected to a mounting cylinder 4 at the same angle. Therefore, when the drive rod 2 rotates, it will drive multiple mounting cylinders 4 to rotate synchronously. The mounting cylinders 4 will then drive multiple stirring plates 5 to rotate together. At the same time, since the stirring plates 5 adopt an inclined design, during their rotation, they can not only fully stir the tire oil in the storage stirring tank 1, but also push the tire oil upward, thereby effectively preventing the tire oil from stratifying, and preventing the sedimentation of gum and fine impurities due to standing. This ensures the uniform and stable quality of the tire oil and lays the foundation for precise feeding in the subsequent suspended bed hydrogenation process.

[0023] Multiple first connecting rods 6 are fixedly connected to both the upper and lower parts of the active rod 2. The end of the first connecting rod 6 away from the active rod 2 is fixedly connected to the side scraper 7. Therefore, when the active rod 2 rotates, it will drive the first connecting rod 6 to rotate synchronously. The first connecting rod 6 then drives the side scraper 7 to slide along the inner circumferential surface of the storage and stirring tank 1. Through the rotation of the side scraper 7, the tire oil adhering to the inner circumferential wall of the storage and stirring tank 1 can be efficiently scraped off, avoiding the waste of raw material residue.

[0024] Please see Figures 1 to 2The heating component includes a heating tube 14 wrapped around the middle of the outer periphery of the storage and stirring tank 1, and a heating isolation ring 3 that can completely wrap the heating tube 14 is fixedly connected to the middle of the outer periphery of the storage and stirring tank 1. The inlet and outlet ends of the heating tube 14 both pass through the heating isolation ring 3. The heating isolation ring 3 can significantly reduce the heat loss of the heating medium in the heating tube 14 to the outside. Combined with the heating effect of the heating tube 14, it can accurately control the temperature of the storage and stirring tank 1, thereby stabilizing the temperature of the tire oil in the storage and stirring tank 1 within the process requirements range, ensuring the flowability and quality stability of the raw materials.

[0025] Please see Figures 1 to 3 Multiple stirring plates 5 are rotatably connected to driven rods 9 from top to bottom on the same vertical line. Multiple stirring rods 10 are fixedly connected to their corresponding driven rods 9. A driving component for driving the driven rods 9 to rotate is provided on the inner top of the storage stirring tank 1. Meanwhile, each driven rod 9 vertically penetrates the corresponding stirring plate 5, and the driven rod 9 and the stirring plate 5 are connected by a rotating method. Therefore, when the stirring plate 5 rotates with the driving rod 2, it will synchronously drive the driven rod 9 to rotate, and then the driven rod 9 will drive the stirring rod 10 to rotate together. The driving component includes a plurality of second connecting rods 11 fixedly connected to the top of the inner circumferential surface of the storage and stirring tank 1. An internal gear ring plate 12 is fixedly connected to one end of the plurality of second connecting rods 11 away from the inner circumferential surface of the storage and stirring tank 1. A gear 13 is fixedly connected to the top of a plurality of driven rods 9. The gears 13 are all geared on the inner circumferential surface of the internal gear ring plate 12. Therefore, when the driven rod 9 rotates around the driving rod 2, it synchronously drives the gear 13 to move together. Since the gear 13 meshes with the internal gear ring plate 12, during the rotation of the driven rod 9, the gear 13 will rotate due to the tooth surface transmission, which in turn drives the driven rod 9 to rotate synchronously. Finally, the driven rod 9 drives the stirring rod 10 to rotate around it. Therefore, while the stirring rod 10 revolves around it under the drive of the driving rod 2, it achieves synchronous rotation through the meshing transmission of the gear 13 and the internal gear ring plate 12, thereby forming a multi-dimensional stirring flow field. This can not only fully break up the local static area of ​​the tire oil, but also enhance the radial and axial mixing of the raw materials in the tank, effectively preventing the tire oil from stratifying due to density differences and the sedimentation of gum and fine impurities, significantly improving the uniformity of the raw materials, and providing a stable feed for the subsequent suspended bed hydrogenation process.

[0026] In summary, when using this pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation, the self-produced tire oil is first received by the feedstock receiving tank. It then passes through a basket filter to remove solid impurities such as rubber debris and metal particles. An atmospheric pressure dehydration tank (with a heating jacket, operating temperature 100-120℃) removes free water and some emulsified water. A precision filter intercepts fine colloids and carbon black particles. The qualified feedstock then enters the storage and stirring tank 1. The drive motor on the upper surface of the storage and stirring tank 1 is started, and its bottom shaft drives the drive rod 2 to rotate synchronously. The drive rod 2, on one hand, drives the inclined stirring plate 5 to rotate through the mounting cylinder 4, stirring the tire oil and pushing it upwards. On the other hand, it drives the side scraper 7 to slide along the inner circumference of the storage and stirring tank 1 through the first connecting rod 6, cooperating with the bottom scraper 8 at the bottom of the drive rod 2 to scrape... In addition to removing adhering raw materials from the inner wall and bottom of the tank to avoid waste, the heating element 14 in the heating component heats the storage and stirring tank 1, and the heating isolation ring 3 reduces heat loss, ensuring that the temperature of the tire oil in the tank remains stable within the process range. When the drive rod 2 rotates, it also drives the driven rod 9 to revolve around the drive rod 2 through the stirring plate 5. The gear 13 at the top of the driven rod 9 meshes with the internal gear ring plate 12, causing the gear 13 to rotate and drive the driven rod 9 and the stirring rod 10 to rotate synchronously, forming a multi-dimensional three-dimensional stirring flow field. Finally, the pretreated tire oil is uniformly and stably stored in the storage and stirring tank 1, effectively avoiding stratification and impurity sedimentation, and providing qualified raw materials for the subsequent suspended bed hydrogenation process at any time. The entire system process is simple, efficient, and fully adaptable to the process requirements of tire oil hydrogenation pretreatment.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pretreatment and storage system for tire oil feedstock used in suspended bed hydrogenation, comprising a feedstock receiving tank, a basket filter, an atmospheric pressure dehydration tank, a precision filter, and a storage and stirring tank (1), characterized in that: The storage stirring tank (1) is equipped with a rotating drive rod (2). Multiple stirring plates (5) that can stir the tire oil in the storage stirring tank (1) and push it upward are evenly arranged on the outer circumferential surface of the drive rod (2). The storage stirring tank (1) is equipped with a side scraper (7) that can rotate synchronously with the drive rod (2). One end of the side scraper (7) abuts against the inner circumferential surface of the storage stirring tank (1). The bottom end of the drive rod (2) is fixedly connected to a bottom scraper (8) that abuts against the bottom surface of the storage stirring tank (1). A heating component is provided in the middle of the outer circumferential surface of the storage stirring tank (1). Multiple stirring rods (10) that can rotate on their own are arranged on the multiple stirring plates (5) from top to bottom on the same vertical line.

2. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 1, characterized in that: A drive motor is fixedly connected to the center of the upper surface of the storage stirring tank (1), the bottom shaft of the drive motor extends into the storage stirring tank (1), and the top of the active rod (2) is fixedly connected to the bottom shaft of the drive motor.

3. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 1, characterized in that: Multiple mounting cylinders (4) are uniformly fixedly connected to the outer periphery of the active rod (2) from top to bottom, and each set of four adjacent stirring plates (5) are fixedly connected to a mounting cylinder (4) at the same angle.

4. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 1, characterized in that: Multiple first connecting rods (6) are fixedly connected to both the upper and lower parts of the active rod (2), and the end of the first connecting rod (6) away from the active rod (2) is fixedly connected to the side scraper (7).

5. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 1, characterized in that: The heating component includes a heating tube (14) wrapped around the middle of the outer periphery of the storage stirring tank (1), and a heating isolation ring (3) that can completely wrap the heating tube (14) is fixedly connected to the middle of the outer periphery of the storage stirring tank (1). The inlet and outlet ends of the heating tube (14) both pass through the heating isolation ring (3).

6. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 1, characterized in that: Multiple driven rods (9) are rotatably connected to multiple stirring plates (5) on the same vertical line from top to bottom. Multiple stirring rods (10) are respectively fixedly connected to the corresponding driven rods (9). The inner top of the storage stirring tank (1) is provided with a driving component for driving the driven rods (9) to rotate.

7. The pretreatment and storage system for tire oil feedstock for suspended bed hydrogenation according to claim 6, characterized in that: The driving component includes a plurality of second connecting rods (11) fixedly connected to the top of the inner circumferential surface of the storage stirring tank (1). An internal gear ring plate (12) is fixedly connected to one end of the plurality of second connecting rods (11) away from the inner circumferential surface of the storage stirring tank (1). A gear (13) is fixedly connected to the top of the plurality of driven rods (9). The plurality of gears (13) are geared on the inner circumferential surface of the internal gear ring plate (12).

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