Waste tire thermal cracking carbon black post-treatment device

Abstract

The invention relates to the technical field of waste tire thermal cracking, in particular to a waste tire thermal cracking carbon black aftertreatment device which comprises an inner-layer kettle body, an outer-layer kettle body, a feeding bin, a discharging structure and a tail gas collecting and discharging mechanism, the outer-layer kettle body is arranged on the inner-layer kettle body in a sleeving mode, and a vacuum cavity is formed between the outer-layer kettle body and the inner-layer kettle body; the two ends of the inner-layer kettle body extend out of the outer-layer kettle body, and the feeding bin is arranged on one side of the inner-layer kettle body and located outside the outer-layer kettle body; the discharging structure is arranged on the other side of the inner-layer kettle body and is positioned outside the outer-layer kettle body; the two groups of tail gas collecting and discharging mechanisms are respectively mounted at two ends of the inner-layer kettle body and are used for collecting and condensing tail gas generated after reaction; according to the invention, a special gas path arrangement mode and a kettle body dynamic mode are adopted, so that thermal cracking carbon black is in full contact with reaction gas, the reaction time is shortened, the defect of incomplete reaction is overcome, and the product quality and the quality uniformity are improved.

Description

Technical Field

[0001] The invention relates to the technical field of waste tire thermal cracking, and in particular to a waste tire thermal cracking carbon black post-processing device. Background Art

[0002] The waste tire rubber blocks undergo thermal cracking reaction in an oxygen-free or oxygen-deficient cracking reactor, and the solid phase products generated are processed through multiple iron removal and grinding processes to obtain the product called waste tire thermal cracking carbon black; Waste tire pyrolysis carbon black is a mixed carbon material. Its composition is complex. In addition to amorphous carbon, there are also impurities such as pyrolysis oil that has not been completely separated, rubber hydrocarbons that have not been completely cracked, and inorganic substances added during the tire mixing process. These impurities wrap the pyrolysis carbon black layer by layer, resulting in a significant decrease in the performance of pyrolysis carbon black compared to the original carbon black, and it cannot meet the requirements of being re-applied in tires as a sustainable material. At present, the existing technology lacks a device that can post-treat pyrolysis carbon black.

[0003] Therefore, how to remove a portion of the thermal cracking carbon black impurities and regenerate the surface functional groups of the thermal cracking carbon black, thereby improving the reinforcing performance of the thermal cracking carbon black in rubber has become a technical problem that needs to be urgently solved by technicians in this field. Summary of the invention

[0004] The invention provides a waste tire pyrolysis carbon black post-processing device for solving the problem of how to remove a part of pyrolysis carbon black impurities and regenerate the surface functional groups of pyrolysis carbon black, thereby improving the reinforcing performance of pyrolysis carbon black in rubber.

[0005] The present invention provides a waste tire thermal cracking carbon black post-processing device, comprising: Inner kettle body; The outer kettle body is sleeved on the inner kettle body, and a vacuum chamber is provided between the outer kettle body and the inner kettle body; Feed bin; both ends of the inner kettle body extend to the outside of the outer kettle body, and the feed bin is arranged on one side of the inner kettle body and is located outside the outer kettle body; The discharging structure is arranged on the other side of the inner kettle body and outside the outer kettle body; Tail gas collecting and discharging mechanism; the tail gas collecting and discharging mechanism is provided with two groups, and is respectively installed at the two ends of the inner kettle body, and is used to collect and condense the tail gas generated after the reaction.

[0006] In some embodiments, the inner kettle body includes: an inner cylinder and a silicon carbon rod; the silicon carbon rod is wound on the outer surface of the inner cylinder.

[0007] In some embodiments, a plurality of isostatically pressed graphite blocks are sleeved on the outer surface of the silicon carbon rod, and the plurality of isostatically pressed graphite blocks are evenly distributed along the axial direction of the inner cylinder.

[0008] In some embodiments, the outer kettle body is an outer cylinder body, the outer cylinder body is sleeved on the inner cylinder body, and a vacuum chamber is provided between the outer cylinder body and the inner cylinder body.

[0009] In some embodiments, the feed bin is disposed on one side of the inner cylinder, and a plug-in plate is plugged into the feed bin.

[0010] In some embodiments, the discharge structure includes a discharge pipe and a finished product tank, one end of the discharge pipe is connected to the interior of the inner cylinder, and the other end is connected to the finished product tank. The discharge pipe is arranged at an angle, and the height of the discharge pipe close to one end of the inner cylinder is higher than the height close to the other end of the finished product tank.

[0011] In some embodiments, the exhaust gas collection and emission mechanism includes: a gas cooler and an oil tank, one end of the gas cooler is connected to one side of the inner cylinder through a pipeline, and the other end is connected to the oil tank through a pipeline, and an air outlet is also provided on the gas cooler, and a stop valve is installed on the pipeline connecting the gas cooler and the inner cylinder.

[0012] In some embodiments, a motor is disposed on one side of the inner cylinder, and an output end of the motor extends into the interior of the inner cylinder and is connected to a spiral auger.

[0013] In some embodiments, a plurality of first air inlet holes are provided at both ends of the inner cylinder for introducing inert gas.

[0014] The outer surface of the inner cylinder is provided with a plurality of second air inlet holes along the axial direction for introducing acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas.

[0015] The beneficial effects of the present invention are as follows: When the waste tire pyrolysis carbon black post-processing device of the present invention is used, the pyrolysis carbon black powder is put into the inner cylinder through the feed bin, and moves forward under the action of the spiral auger until the inner cylinder is fully loaded. While feeding, the first air inlet away from one end of the feed bin and the stop valve in the tail gas collection and discharge mechanism near one end of the feed bin are opened, and an inert gas (such as nitrogen) is introduced into the inner cylinder through the first air inlet away from one end of the feed bin to remove the air in the material and prevent the volatilized gas from being adsorbed on the surface of the pyrolysis carbon black for the second time. At this time, the electric heating switch is turned on, and the heating element silicon carbon rod gradually heats up to heat the cylinder wall of the inner cylinder. A small amount of uncracked rubber hydrocarbons and cracked oil organic matter in the pyrolysis carbon black will decompose and volatilize in the heated inner cylinder, and will be discharged to the gas cooler near the side of the feed bin under the action of the airflow guide of the first air inlet. When the temperature rises to the specified reaction temperature, keep it warm for a certain time. The surface of the pyrolysis carbon black treated in this stage is relatively clean, and subsequent modification can be carried out on this basis. After the insulation is completed, close the first air inlet far from one end of the feed bin and the stop valve in the tail gas collection and discharge mechanism near one end of the feed bin. Open the first air inlet near one side of the feed bin and the stop valve in the tail gas collection and discharge mechanism far from one side of the feed bin, and open the second air inlet to pass the required gas (usually acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas, etc.), and the excess solution and water will flow into the oil tank for collection after cooling, and the gas will be discharged through the outlet. After the entire process is completed, restart the spiral auger to convey the material forward, so that the processed product is conveyed to the finished product tank through the discharge pipe for collection; the present invention adopts a special gas path arrangement method and a dynamic method of the kettle body, so that the pyrolysis carbon black is more fully in contact with the reaction gas, shortens the reaction time, overcomes the defect of incomplete reaction, and thus improves the product quality and uniformity of quality. At the same time, the present invention has a simple structure, high pyrolysis carbon black treatment efficiency, mild reaction conditions, and can meet the requirements of continuous production. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of some specific embodiments of a waste tire thermal cracking carbon black post-processing device of the present invention; Figure 2 yes Figure 1 The schematic structural diagram of some specific embodiments of the inner cylinder in a waste tire thermal cracking carbon black post-processing device is shown; Figure 3 yes Figure 1 The schematic diagram of the structure of some specific embodiments of the first air inlet in a waste tire thermal cracking carbon black post-processing device is shown.

[0017] In the attached drawings, 1. inner cylinder; 2. isostatically pressed graphite block; 3. outer cylinder; 4. feed bin; 5. plug-in board; 6. discharge pipe; 7. finished product tank; 8. motor; 9. spiral auger; 10. first air inlet; 11. second air inlet; 12. silicon carbon rod; 13. gas cooler; 14. oil tank; 15. air outlet. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] At present, there are many methods for modifying thermal cracking carbon black. The process method combining high-temperature heat treatment and gas phase modification is both environmentally friendly and effective, and is currently the most cutting-edge technical process route. This process route is difficult to implement in a waste tire thermal cracking reactor, and a new reaction device must be invented to implement the above-mentioned post-processing method. Therefore, how to invent a new reactor suitable for combining high-temperature heat treatment and gas phase modification has become a technical problem that needs to be solved urgently by those skilled in the art.

[0020] To solve the above problems, refer to Figure 1 , Figure 2 and Figure 3 The present invention provides a waste tire thermal cracking carbon black post-processing device, comprising: Inner kettle body; The outer kettle body is sleeved on the inner kettle body, and a vacuum chamber is provided between the outer kettle body and the inner kettle body; Feed bin 4; both ends of the inner kettle body extend to the outside of the outer kettle body, and the feed bin 4 is arranged on one side of the inner kettle body and is located outside the outer kettle body; The discharging structure is arranged on the other side of the inner kettle body and outside the outer kettle body; Tail gas collecting and discharging mechanism; the tail gas collecting and discharging mechanism is provided with two groups, and is respectively installed at the two ends of the inner kettle body, and is used to collect and condense the tail gas generated after the reaction.

[0021] Specifically, when in use, the inner kettle body and the outer kettle body both rotate, and the rotation form is forward half a circle and then reverse half a circle, and this cycle is repeated, and the rotation speed is 0.5-1R / min.

[0022] Preferably, the inner kettle body comprises: an inner cylinder 1 and a silicon carbon rod 12; the silicon carbon rod 12 is wound on the outer surface of the inner cylinder 1; Specifically, the silicon carbon rod 12 wound on the inner cylinder 1 can heat the inner cylinder 1 evenly, so that the thermal cracking carbon black powder inside the inner cylinder 1 is heated evenly, wherein the silicon carbon rod 12 is not only resistant to high temperatures but also has a long service life.

[0023] Preferably, a plurality of isostatic graphite blocks 2 are sleeved on the outer surface of the silicon carbon rod 12, and the plurality of isostatic graphite blocks 2 are evenly distributed along the axial direction of the inner cylinder 1; Specifically, a gap of about 2 mm is provided between two adjacent isostatic graphite blocks 2 to prevent thermal expansion and contraction from damaging the isostatic graphite blocks 2. At the same time, in the technical solution of the present invention, the maximum heating temperature can reach 900°C, and the isostatic graphite blocks 2 arranged in an array can effectively play a heat preservation effect and ensure uniform temperature of the cylinder wall.

[0024] Preferably, the outer layer kettle body is an outer layer cylinder 3, the outer layer cylinder 3 is sleeved on the inner layer cylinder 1, and a vacuum chamber is provided between the outer layer cylinder 3 and the inner layer cylinder 1; Specifically, the inner cylinder 1 and the outer cylinder 3 are both made of stainless steel to prevent acid, alkali or water vapor corrosion.

[0025] Preferably, the feed bin 4 is arranged on one side of the inner cylinder 1, and a plug-in board 5 is plugged into the feed bin 4; Specifically, when the inner cylinder 1 is heated, the plug board 5 is closed to prevent heat leakage.

[0026] Preferably, the discharge structure includes a discharge pipe 6 and a finished product tank 7, one end of the discharge pipe 6 is connected to the interior of the inner cylinder 1, and the other end is connected to the finished product tank 7, the discharge pipe 6 is inclined, and the height of the discharge pipe 6 close to the inner cylinder 1 is higher than the height of the end close to the finished product tank 7; Specifically, the product powder will "flow" into the finished product tank 7 under its own gravity and the driving action of the spiral auger 9.

[0027] Preferably, the exhaust gas collection and emission mechanism includes: a gas cooler 13 and an oil tank 14, one end of the gas cooler 13 is connected to one side of the inner cylinder 1 through a pipeline, and the other end is connected to the oil tank 14 through a pipeline, and an air outlet 15 is also provided on the gas cooler 13, and a stop valve is installed on the pipeline connecting the gas cooler 13 and the inner cylinder 1.

[0028] Specifically, the exhaust gas collection and discharge mechanism at one end away from the feed bin 4 is connected to the bottom of the inner cylinder 1, and a screen is installed at the connection point. The aperture of the screen is 15μm. The exhaust gas collection and discharge mechanism arranged at the bottom of the inner cylinder 1 can collect the excess solution and water during the reaction into the oil tank 14 away from the side of the feed bin 4 after cooling. The diameter of the product powder is often between 20μm-30μm, so it will not fall into the oil tank 14 through the screen.

[0029] Preferably, a motor 8 is provided on one side of the inner cylinder 1 , and an output end of the motor 8 extends into the interior of the inner cylinder 1 and is connected to a spiral auger 9 .

[0030] Preferably, both ends of the inner cylinder 1 are provided with a plurality of first air inlet holes 10 for introducing inert gas; Specifically, the number of the first air inlet holes 10 is preferably four, and they are evenly distributed circumferentially with the cross-sectional center of the inner cylinder 1 as the center, so as to efficiently discharge the air entrained when the thermal cracking carbon black powder is fed. By introducing inert gas into the first air inlet hole 10, the air entrained by the material can be discharged through the air outlet 15, and at the same time, the volatile substances in the high-temperature process are prevented from condensing on the furnace wall and the surface of the cracking carbon black. The exhaust gas will be condensed and filtered in the gas cooler 13 and collected by the oil tank 14.

[0031] Preferably, the outer surface of the inner cylinder 1 is provided with a plurality of second air inlet holes 11 along the axial direction, for introducing acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas; Specifically, valves are installed on the outside of the first air inlet 10 and the second air inlet 11 to control the flow and pressure of the gas entering the inner cylinder 1, wherein the interval between two adjacent second air inlet holes 11 is 500 mm, and the reaction gas introduced into the second air inlet 11 can increase the functional groups on the surface of the cracked carbon black and restore the deactivated functional groups.

[0032] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0033] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A waste tire thermal cracking carbon black post-processing device, characterized in that: include: Inner kettle body; The outer kettle body is sleeved on the inner kettle body, and a vacuum chamber is provided between the outer kettle body and the inner kettle body; A feed bin (4); both ends of the inner kettle body extend to the outside of the outer kettle body, and the feed bin (4) is arranged on one side of the inner kettle body and is located outside the outer kettle body; The discharging structure is arranged on the other side of the inner kettle body and outside the outer kettle body; Tail gas collecting and discharging mechanism; the tail gas collecting and discharging mechanism is provided with two groups, and is respectively installed at the two ends of the inner kettle body, and is used to collect and condense the tail gas generated after the reaction.

2. The waste tire pyrolysis carbon black post-processing device according to claim 1 is characterized in that: The inner kettle body comprises: an inner cylinder (1) and a silicon carbon rod (12); the silicon carbon rod (12) is wound on the outer surface of the inner cylinder (1).

3. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: A plurality of isostatically pressed graphite blocks (2) are sleeved on the outer surface of the silicon carbon rod (12), and the plurality of isostatically pressed graphite blocks (2) are evenly distributed along the axial direction of the inner cylinder (1).

4. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: The outer kettle body is an outer cylinder (3), the outer cylinder (3) is sleeved on the inner cylinder (1), and a vacuum chamber is provided between the outer cylinder (3) and the inner cylinder (1).

5. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: The feed bin (4) is arranged on one side of the inner cylinder (1), and a plug-in plate (5) is plugged into the feed bin (4).

6. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: The discharge structure comprises a discharge pipe (6) and a finished product tank (7); one end of the discharge pipe (6) is connected to the interior of the inner cylinder (1), and the other end is connected to the finished product tank (7); the discharge pipe (6) is arranged obliquely, and the height of the discharge pipe (6) close to the inner cylinder (1) is higher than the height of the end close to the finished product tank (7).

7. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: The exhaust gas collection and emission mechanism comprises: a gas cooler (13) and an oil tank (14); one end of the gas cooler (13) is connected to the inner cylinder (1) via a pipeline, and the other end is connected to the oil tank (14) via a pipeline; an air outlet (15) is also provided on the gas cooler (13); and a stop valve is installed on the pipeline connecting the gas cooler (13) and the inner cylinder (1).

8. The waste tire pyrolysis carbon black post-processing device according to claim 2 is characterized in that: A motor (8) is provided on one side of the inner cylinder (1); an output end of the motor (8) extends into the interior of the inner cylinder (1) and is connected to a spiral auger (9).

9. The waste tire pyrolysis carbon black post-processing device according to claim 8, characterized in that: Both ends of the inner cylinder (1) are provided with a plurality of first air inlet holes (10) for introducing inert gas.

10. The waste tire pyrolysis carbon black post-processing device according to claim 2, characterized in that: The outer surface of the inner cylinder (1) is provided with a plurality of second air inlet holes (11) along the axial direction, for introducing acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas.

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