A waste tire thermal cracking carbon black post-treatment device

Abstract

The present application relates to waste tire thermal cracking technical field, especially to a kind of waste tire thermal cracking carbon black post-treatment device, comprising: inner layer kettle body, outer layer kettle body, feed bin, discharge structure and tail gas collection and discharge mechanism, outer layer kettle body is set on the inner layer kettle body, and vacuum cavity is arranged between outer layer kettle body and inner layer kettle body;Two ends of inner layer kettle body are all extended to the outside of outer layer kettle body, feed bin is set in the side of the inner layer kettle body, and located the outside of outer layer kettle body;Discharge structure is set in the other side of inner layer kettle body, and located the outside of outer layer kettle body;Tail gas collection and discharge mechanism are provided with two groups, and are respectively installed in the two ends of inner layer kettle body, for collecting and condensing the tail gas generated after reaction;The present application adopts special gas path arrangement mode and kettle body dynamic mode, so that thermal cracking carbon black is more fully contacted with reaction gas, reaction time is shortened, the defect that reaction is not complete is overcome, so as to improve product quality and quality uniformity.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste tire thermal cracking, and particularly relates to a waste tire thermal cracking carbon black post-treatment device. BACKGROUND

[0002] The waste tire rubber block is subjected to thermal cracking reaction in an oxygen-free or oxygen-deficient cracking reaction furnace, and the product obtained by removing iron and grinding processing multiple times is called waste tire thermal cracking carbon black.

[0003] The waste tire thermal cracking carbon black is a mixed carbon material. The composition is complex, and in addition to amorphous carbon, there are impurity components such as unseparated cracking oil, uncracked rubber hydrocarbon and inorganic substances added in the tire mixing process, which are wrapped in layers of thermal cracking carbon black, resulting in a significant decrease in the performance of the thermal cracking carbon black compared with the original carbon black, which cannot meet the requirements of reapplying it as a sustainable material to tires. At present, there is a lack of a device for post-treatment of thermal cracking carbon black in the prior art.

[0004] Therefore, how to remove a part of the thermal cracking carbon black impurities and regenerate the surface functional groups of the thermal cracking carbon black to improve the reinforcing performance of the thermal cracking carbon black in rubber has become a technical problem to be solved by those skilled in the art. SUMMARY

[0005] The present application provides a waste tire thermal cracking carbon black post-treatment device to solve the problem of how to remove a part of the thermal cracking carbon black impurities and regenerate the surface functional groups of the thermal cracking carbon black to improve the reinforcing performance of the thermal cracking carbon black in rubber.

[0006] The present application provides a waste tire thermal cracking carbon black post-treatment device, comprising:

[0007] An inner kettle body;

[0008] An outer kettle body; the outer kettle body is sleeved on the inner kettle body, and a vacuum cavity is arranged between the outer kettle body and the inner kettle body;

[0009] A feeding bin; both ends of the inner kettle body extend to the outside of the outer kettle body, the feeding bin is arranged on one side of the inner kettle body and located outside the outer kettle body;

[0010] A discharging structure; the discharging structure is arranged on the other side of the inner kettle body and located outside the outer kettle body;

[0011] A tail gas collection and discharge mechanism; the tail gas collection and discharge mechanism is provided with two groups and is respectively installed at both ends of the inner kettle body for collecting and condensing the tail gas generated after the reaction.

[0012] In some embodiments, the inner layer kettle body comprises: an inner layer cylinder and a silicon-carbon rod; the silicon-carbon rod is wound on the outer surface of the inner layer cylinder.

[0013] In some embodiments, a plurality of isostatic pressing graphite blocks are sleeved on the outer surface of the silicon-carbon rod, and the plurality of isostatic pressing graphite blocks are uniformly distributed along the axial direction of the inner layer cylinder.

[0014] In some embodiments, the outer layer kettle body is an outer layer cylinder, the outer layer cylinder is sleeved on the inner layer cylinder, and a vacuum cavity is arranged between the outer layer cylinder and the inner layer cylinder.

[0015] In some embodiments, the feeding bin is arranged on one side of the inner layer cylinder, and a plug-in plate is inserted into the feeding bin.

[0016] In some embodiments, the discharging structure comprises a discharging pipe and a finished product tank, one end of the discharging pipe is in communication with the inside of the inner layer cylinder, the other end is in communication with the finished product tank, the discharging pipe is arranged obliquely, and the height of the end of the discharging pipe close to the inner layer cylinder is higher than the height of the end close to the finished product tank.

[0017] In some embodiments, the tail gas collection and discharge mechanism comprises: a gas cooler and an oil tank, one end of the gas cooler is in communication with one side of the inner layer cylinder through a pipeline, the other end is in communication with the oil tank through a pipeline, the gas cooler is further provided with a gas outlet hole, and a stop valve is installed on the pipeline in communication with the inner layer cylinder.

[0018] In some embodiments, a motor is arranged on one side of the inner layer cylinder, the output end of the motor extends into the inside of the inner layer cylinder, and a spiral auger is connected.

[0019] In some embodiments, a plurality of first gas inlets are arranged on both ends of the inner layer cylinder for introducing inert gas.

[0020] A plurality of second gas inlets are arranged on the outer surface of the inner layer cylinder along the axial direction for introducing acid solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas.

[0021] The beneficial effects of the present application are as follows: when the waste tire thermal cracking carbon black post-treatment device of the present application is used, the thermal cracking 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 at the end away from the feed bin and the stop valve in the tail gas collection and discharge mechanism near the end of the feed bin are opened. Inert gas (such as nitrogen) is introduced into the inner cylinder through the first air inlet at the end away from the feed bin to remove air in the material and prevent secondary adsorption of volatilized gas on the surface of thermal cracking carbon black. At this time, the electric heating switch is opened, 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 hydrocarbon and cracked oil organic matter in the thermal cracking carbon black will be decomposed and volatilized in the heated inner cylinder and discharged into the gas cooler near the feed bin under the action of the first air inlet gas flow guide. When the temperature rises to the specified reaction temperature, heat for a certain period of time. The thermal cracking carbon black treated in this stage has a clean surface and can be modified on this basis. After heat preservation is completed, the first air inlet at the end away from the feed bin and the stop valve in the tail gas collection and discharge mechanism near the end of the feed bin are closed. The first air inlet near the feed bin and the stop valve in the tail gas collection and discharge mechanism away from the feed bin are opened, and the second air inlet is opened to introduce the required gas (usually acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas, etc.). The excess solution and water flow into the oil tank after cooling for collection, and the gas is discharged through the gas outlet. After the entire process is completed, the spiral auger is restarted to forward the material, and the treated product is transported to the finished product tank through the discharge pipe for collection; the present application adopts a special gas path arrangement and kettle body dynamic mode, which makes the cracking carbon black contact with the reaction gas more fully, shortens the reaction time, overcomes the defect of incomplete reaction, thereby improving the product quality and uniformity of quality. At the same time, the present application has simple structure, high thermal cracking carbon black treatment efficiency, mild reaction conditions, and can meet the requirements of continuous production. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a structure diagram of some specific embodiments of a waste tire thermal cracking carbon black post-treatment device of the present application;

[0023] Figure 2 is Figure 1 is a structure diagram of some specific embodiments of an inner cylinder in a waste tire thermal cracking carbon black post-treatment device shown in the present application;

[0024] Figure 3 is Figure 1 is a structure diagram of some specific embodiments of a first air inlet in a waste tire thermal cracking carbon black post-treatment device shown in the present application.

[0025] In the drawing, 1, inner layer cylinder; 2, isostatic graphite block; 3, outer layer cylinder; 4, feeding 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

[0026] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] At present, there are many modification methods for pyrolysis carbon black, and the process method combining high-temperature heat treatment and gas phase modification is an environmentally friendly and effective method, and is the most advanced technical process route at present. This process route is difficult to realize in the waste tire pyrolysis reaction kettle, and a new reaction device must be invented to realize the post-treatment of the above method. Therefore, how to invent a new reaction kettle suitable for high-temperature heat treatment and gas phase modification has become a technical problem to be solved by those skilled in the art.

[0028] To solve the above problems, with reference to Figure 1 , Figure 2 and Figure 3 , the present application provides a waste tire pyrolysis carbon black post-treatment device, comprising:

[0029] Inner kettle body;

[0030] Outer kettle body; the outer kettle body is sleeved on the inner kettle body, and a vacuum cavity is arranged between the outer kettle body and the inner kettle body;

[0031] Feeding bin 4; both ends of the inner kettle body extend to the outside of the outer kettle body, the feeding bin 4 is arranged on one side of the inner kettle body and located outside the outer kettle body;

[0032] Discharge structure; the discharge structure is arranged on the other side of the inner kettle body and located outside the outer kettle body;

[0033] Tail gas collection and discharge mechanism; the tail gas collection and discharge mechanism is provided with two groups and is respectively installed at both ends of the inner kettle body for collecting and condensing the tail gas generated after the reaction.

[0034] Specifically, when in use, the inner kettle body and the outer kettle body are rotated, and the rotation form is to rotate forward for half a circle and then reverse for half a circle, and the rotation is cycled, and the rotation speed is 0.5-1R / min.

[0035] 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.

[0036] Specifically, the silicon-carbon rod 12 wound on the inner cylinder 1 can uniformly heat the inner cylinder 1, so that the thermal cracking carbon black powder inside the inner cylinder 1 is uniformly heated, wherein the silicon-carbon rod 12 is not only high-temperature resistant but also has a long service life.

[0037] Preferably, a plurality of isostatic pressing graphite blocks 2 are sleeved on the outer surface of the silicon-carbon rod 12, and the plurality of isostatic pressing graphite blocks 2 are uniformly distributed along the axial direction of the inner cylinder 1.

[0038] Specifically, a gap with a width of about 2mm is arranged between two adjacent isostatic pressing graphite blocks 2 to prevent thermal expansion and cold shrinkage from damaging the isostatic pressing graphite blocks 2, and meanwhile, in the technical scheme of the present application, the maximum heating temperature can reach 900℃, and the arrayed isostatic pressing graphite blocks 2 can effectively play a heat preservation effect and ensure the uniformity of the temperature of the cylinder wall.

[0039] Preferably, the outer kettle body is an outer cylinder 3, the outer cylinder 3 is sleeved on the inner cylinder 1, and a vacuum cavity is arranged between the outer cylinder 3 and the inner cylinder 1.

[0040] Specifically, the materials of the inner cylinder 1 and the outer cylinder 3 are both stainless steel to prevent corrosion by acid, alkali or water vapor.

[0041] Preferably, the feeding bin 4 is arranged on one side of the inner cylinder 1, and a plug-in plate 5 is inserted on the feeding bin 4.

[0042] Specifically, when the inner cylinder 1 is heated, the plug-in plate 5 is closed to prevent heat leakage.

[0043] Preferably, the discharging structure comprises a discharging pipe 6 and a finished product tank 7, one end of the discharging pipe 6 is in communication with the inside of the inner cylinder 1, the other end is in communication with the finished product tank 7, the discharging pipe 6 is arranged obliquely, and the height of the end of the discharging pipe 6 close to the inner cylinder 1 is higher than the height of the end close to the finished product tank 7.

[0044] Specifically, the product powder will flow into the finished product tank 7 under the action of its own gravity and the driving action of the screw auger 9.

[0045] Preferably, the tail gas collecting and discharging mechanism comprises: a gas cooler 13 and an oil tank 14, one end of the gas cooler 13 is in communication with one side of the inner cylinder 1 through a pipeline, the other end is in communication with the oil tank 14 through a pipeline, the gas cooler 13 is further provided with an air outlet hole 15, and a stop valve is installed on the pipeline in communication with the inner cylinder 1.

[0046] Specifically, the tail gas collection and discharge mechanism away from one end of the feed bin 4 is communicated with the bottom of the inner cylinder 1, and a screen is installed at the communication position, the aperture of the screen is 15 microns, and the tail gas collection and discharge mechanism arranged at the bottom of the inner cylinder 1 can collect the excess solution and water after cooling during the reaction into the oil tank 14 away from one side of the feed bin 4, and the diameter of the product powder is often between 20 microns and 30 microns, so the product powder will not fall into the oil tank 14 through the screen.

[0047] Preferably, one side of the inner cylinder 1 is provided with a motor 8, the output end of the motor 8 extends into the inner cylinder 1, and a spiral auger 9 is connected.

[0048] Preferably, a plurality of first gas inlets 10 are arranged at both ends of the inner cylinder 1, for introducing inert gas;

[0049] Specifically, the number of the first gas inlets 10 is preferably four, and the first gas inlets 10 are uniformly distributed in the circumferential direction with the center of the cross section of the inner cylinder 1 as the center, air entrained during the feeding of the pyrolysis carbon black powder is efficiently discharged, the air entrained by the material can be discharged through the gas outlet 15 by introducing inert gas into the first gas inlets 10, and at the same time, the secondary condensation of volatile substances on the furnace wall and the surface of the pyrolysis carbon black during the high-temperature process is prevented, the exhaust gas is condensed and filtered in the gas cooler 13, and collected through the oil tank 14.

[0050] Preferably, a plurality of second gas inlets 11 are arranged on the outer surface of the inner cylinder 1 in the axial direction, for introducing acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas;

[0051] Specifically, valves are installed outside the first gas inlets 10 and the second gas inlets 11, so as to control the flow and pressure of the gas entering the inner cylinder 1, and the interval between two adjacent second gas inlets 11 is 500 mm, and the reaction gas introduced through the second gas inlets 11 can increase the functional groups on the surface of the pyrolysis carbon black and restore the inactivated functional groups.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0053] In addition, the terms "first", "second", etc. are used only to describe the purpose and are not to be interpreted as indicating or implying relative importance or a specific number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified and limited.

[0054] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected or in communication with each other; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples without contradiction.

[0056] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be construed as limiting the present application, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present application.

Claims

1. A waste tire pyrolysis carbon black post-processing device, characterized in that, include: Inner vessel body; Outer vessel body; the outer vessel body is sleeved on the inner vessel body, and a vacuum cavity is provided between the outer vessel body and the inner vessel body, and both the inner and outer vessel bodies can rotate; Feeding bin (4); Both ends of the inner layer of the vessel extend to the outside of the outer layer of the vessel, and the feeding bin (4) is located on one side of the inner layer of the vessel and outside the outer layer of the vessel; The discharge structure is located on the other side of the inner reactor body and outside the outer reactor body. Tail gas collection and emission mechanism; the tail gas collection and emission mechanism is provided in two sets, which are respectively installed at both ends of the inner layer of the vessel, for collecting and condensing the tail gas generated after the reaction; The inner reactor body includes: an inner cylindrical body (1) and silicon carbide rods (12); the silicon carbide rods (12) are wound around the outer surface of the inner cylindrical body (1); Multiple isostatic graphite blocks (2) are fitted on the outer surface of the silicon carbide rod (12), and the multiple isostatic graphite blocks (2) are evenly distributed along the axial direction of the inner cylinder (1). The outer vessel body is an outer cylinder (3), which is sleeved on the inner cylinder (1), and a vacuum cavity is provided between the outer cylinder (3) and the inner cylinder (1); 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 the inner cylinder (1) through a pipeline, and the other end is connected to the oil tank (14) through a pipeline. The gas cooler (13) is also provided with an exhaust port (15). A shut-off valve is installed on the pipeline connecting the gas cooler (13) and the inner cylinder (1). The inner cylinder (1) has multiple first air inlets (10) at both ends for introducing inert gas; The outer surface of the inner cylinder (1) is provided with a plurality of second air inlets (11) along the axial direction for introducing acidic solution water vapor, alkaline solution water vapor, water vapor or carbon dioxide gas.

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

3. The waste tire pyrolysis carbon black post-processing device according to claim 1, characterized in that, 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 end of the discharge pipe (6) near the inner cylinder (1) is higher than the height of the end near the finished product tank (7).

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

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