Electrothermal treatment apparatus for graphitizing carbon black mixed plastics

Abstract

An electrothermal treatment device for graphitizing carbon black mixed plastics is disclosed. It includes an insulated reaction tube containing carbon black raw materials, multi-stage electrodes symmetrically arranged on the upper and lower sides of the insulated reaction tube for electrically heating the carbon black raw materials, a buffer protector to buffer the thermal expansion applied upwards and downwards during the reaction, a gas protective shroud to provide an inert protective atmosphere to the insulated reaction tube and multi-stage electrodes to isolate them from air, and a lifting and adjusting component connected to the multi-stage electrodes to move the electrodes and indirectly drive the gas protective shroud. This electrothermal treatment device for graphitizing carbon black mixed plastics can operate at high power and process large masses of carbon black mixed plastics into highly graphitized carbon black within seconds by automatically controlling the movement of the multi-stage electrodes and the gas protective shroud, which is beneficial for the efficient and stable treatment of carbon black waste plastics.

Description

Technical Field

[0001] This application belongs to the field of graphitization technology for carbon black mixed plastics, and specifically relates to an electrothermal treatment device for graphitization of carbon black mixed plastics. Background Technology

[0002] The effective treatment and economic transformation of waste plastics is a major environmental and economic issue affecting all of humanity. Electrothermal treatment methods can convert waste plastics into highly graphitized carbon black within seconds. Compared to traditional incineration, this method offers significant economic benefits, lower pollution emissions, and has been thoroughly validated in laboratory settings.

[0003] Existing electrothermal treatment methods, such as flash Joule heating and other mainstream technologies, have shortcomings in terms of large-scale processing, equipment durability, and processing safety. This application provides an electrothermal treatment equipment specifically designed to convert large quantities (over 100 g) of carbon-based reactants into highly graphitized carbon black within seconds. This equipment is modular, facilitating control, adjustment, and replacement, aiming to increase the conversion rate of waste plastics, shorten reaction time, reduce energy consumption, and minimize environmental harm, thereby achieving a dual benefit of economic and environmental advantages. Utility Model Content

[0004] To address the problems existing in the prior art, the purpose of this application is to provide an electrothermal treatment device for graphitization of carbon black mixed with plastics. Centered on a high-temperature resistant, replaceable insulating reaction tube, multiple components such as buffer protectors, multi-stage electrodes, a gas protection hood system, and lifting adjustment components are symmetrically arranged above and below, aiming to achieve efficient graphitization treatment of large batches of carbon black.

[0005] Specifically, this application relates to the following aspects: An electrothermal treatment device for graphitizing carbon black mixed with plastics includes: an insulating reaction tube for containing carbon black raw materials; a multi-stage electrode comprising an upper electrode and a lower electrode symmetrically arranged on the upper and lower sides of the insulating reaction tube along its length, wherein the upper electrode and / or the lower electrode is a nested combination of segmented electrodes, for electrically heating the carbon black raw materials; a buffer protector for buffering the thermal expansion forces applied to the upper and lower sides of the carbon black raw materials during the reaction; a gas protective hood for providing an inert protective atmosphere and isolating air to the insulating reaction tube and the multi-stage electrode; and a lifting and adjusting component connected to the multi-stage electrode and the gas protective hood for moving the multi-stage electrode and / or the gas protective hood.

[0006] According to some embodiments of this application, the segmented electrode includes at least two levels of electrodes; at least one level of the segmented electrode extends into the interior of the insulating reaction tube, with one side in contact with the carbon black raw material and the other side nested with the remaining electrodes.

[0007] According to some embodiments of this application, the upper electrode and the lower electrode are the same conductive element or conductive composite material, or they are different conductive elements or conductive composite materials.

[0008] According to some embodiments of this application, buffer protectors are symmetrically arranged on the upper and lower sides of the multi-stage electrodes; the buffer protectors are also used to support the carbon black raw material to be processed.

[0009] According to some embodiments of this application, the material of the buffer protector is a load-bearing material with metallic elasticity; the material of the buffer protector is tungsten steel, carbon steel, manganese steel, chromium vanadium steel, silicon manganese steel or stainless steel.

[0010] According to some embodiments of this application, the gas protective cover includes an inner cover and an outer cover. The inner cover is used to enclose the insulating reaction tube, and the outer cover is used to enclose the insulating reaction tube, multi-stage electrodes, buffer protector, and lifting adjustment components as a whole.

[0011] According to some embodiments of this application, the inner cover is composed of an upper cover and a lower cover, and a lifting adjustment component is connected to at least one of the upper cover and the lower cover to pull it to move in the vertical direction; the upper cover and the lower cover are detachably connected.

[0012] According to some embodiments of this application, the lifting adjustment component has multiple actuators and corresponding controllers for driving the upper electrode, lower electrode, upper half cover and / or lower half cover to move in the vertical direction.

[0013] According to some embodiments of this application, each stage of the multi-stage electrode is connected to the other stage, the buffer protector is connected to the multi-stage electrode, and / or the lifting adjustment component is connected to the multi-stage electrode by insulating screws.

[0014] According to some embodiments of this application, the insulating reaction tube is made of transparent material; the electrothermal treatment equipment for graphitization of carbon black mixed plastics also includes an infrared thermometer, which is disposed outside the gas protective cover to monitor the temperature inside the insulating reaction tube.

[0015] The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to the above embodiments has the following beneficial effects: The electrothermal treatment equipment for graphitization of carbon black mixed with plastics provided in this application can stably achieve a one-step carbon black graphitization reaction with high power, seconds-level operation, and single-power supply by setting up multi-level nested power supply electrodes symmetrically arranged on both sides of the reactants. The process is simple and easy to control.

[0016] The electrothermal treatment equipment for graphitizing carbon black mixed plastics is equipped with metal elastic buffer protectors at both ends of the entire equipment, which significantly reduces the breakage rate of the reaction tubes after heating, improves the reliability of the equipment, and extends the service life of the reaction tubes in the equipment by hundreds of times compared to their laboratory stage.

[0017] The multi-stage electrode nesting design of the electrothermal treatment equipment for graphitizing carbon black mixed plastics effectively ensures the uniform distribution of current in the carbon black reactants, which can improve the degree of graphitization of the reactants.

[0018] The electrothermal treatment equipment for graphitizing carbon black mixed plastics provided in this application has an inner and outer double-layer gas protection shroud design that effectively ensures the safety of the reaction process and operation.

[0019] The electrothermal treatment equipment for graphitization of carbon black mixed plastics provided in this application improves the production flexibility of the entire treatment process by utilizing lifting and adjusting components, enabling the equipment to process more than 100 g per batch, and increasing production efficiency by 200-500 times compared to the laboratory stage. Attached Figure Description

[0020] Figure 1 The figure shows a structural block diagram of an electrothermal treatment apparatus for graphitizing carbon black mixed plastics according to an embodiment of this application. Detailed Implementation

[0021] The present application is further illustrated below with reference to embodiments. It should be understood that the embodiments are only used to further illustrate and explain the present application and are not intended to limit the present application.

[0022] Unless otherwise defined, technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art. While similar or identical methods and materials may be applied in experimental or practical applications, materials and methods are described herein. In case of conflict, the definitions included herein shall prevail. Furthermore, materials, methods, and examples are for illustrative purposes only and are not intended to be limiting. The present application is further described below with reference to specific embodiments, but is not intended to limit the scope of the application.

[0023] Unless otherwise specified, "carbon black mixed plastic", "carbon black raw material" and "carbon black raw material reactants" mentioned below refer to plastic waste containing carbon black as a filler, in which the carbon can be rapidly transformed into graphite with a regular crystal structure at high temperature.

[0024] The electrothermal treatment equipment for graphitizing carbon black mixed plastics provided in this application includes an insulated reaction tube, multi-stage electrodes, a buffer protector, and a gas protection hood. The insulated reaction tube contains the carbon black raw material to be graphitized and can withstand high-temperature environments. After the insulated reaction tube is heated, the carbon black in it will be converted into highly graphitized carbon black at high temperatures. After the heating is turned off and the temperature is allowed to drop, the graphitized carbon black product can be obtained.

[0025] Heating of the insulated reaction tube and the carbon black raw material within it is achieved by energizing a multi-stage electrode. Specifically, the multi-stage electrode is attached to the upper and lower sides of the insulated reaction tube along its length. This length direction refers to the direction in which the tube wall extends. The insulated reaction tube can be placed horizontally, with the multi-stage electrode attached to its walls. At least one electrode on each side extends into the tube and contacts the reactants. The upper electrode is located on the upper side of the insulated reaction tube, and the lower electrode is located on the lower side. The upper and lower electrodes are symmetrically arranged to ensure a uniform current distribution across the upper and lower sides of the reaction tube when energized.

[0026] In one example, the insulating reaction tube can be a quartz tube, which exhibits minimal volume change when rapidly heated or cooled, and can withstand drastic temperature changes without easily breaking. Furthermore, the quartz insulating reaction tube possesses good chemical inertness and will not interfere with the graphitization process of the carbon black raw material.

[0027] The heating of the insulated reaction tube and the carbon black raw material reactants within it by a multi-stage electrode is achieved by applying voltage to the carbon black raw material through the multi-stage electrode, thereby generating current in the reactants and producing Joule heating. As described above, at least one stage of each of the upper and lower electrodes can be in direct contact with the carbon black raw material reactants in the insulated reaction tube. For example, the carbon black raw material reactants are compacted vertically in the insulated reaction tube, and then the electrodes energize and heat the reactants by applying pulsed voltage.

[0028] Both the upper and lower electrodes can be composite electrodes composed of multiple nested electrode segments. Each stage of the electrodes is securely connected by insulating screws. For example, both the upper and lower electrodes include at least two nested electrodes at different vertical heights connected by insulating screws. The electrodes closest to the reactants extend into the insulating reaction tube to compact the reactants. Preferably, the upper and lower electrodes have the same number of nested electrodes. This ensures that the conduction and distribution of current in the reactants remain uniform vertically after energization, and also facilitates voltage control. This design of multiple nested electrodes is more stable than traditional electrodes, such as those used for gas diffusion electrodes and cylindrical electrodes. With some electrodes fixing and compacting the reactants, and others connected to the power supply and fixed to the buffer protector at the periphery of the reaction, the current distribution in the reactants is more stable and uniform, which is beneficial for the complete reaction.

[0029] Each nested electrode in the multi-stage electrode system can be made of the same or different conductive elemental material or conductive composite material. Preferably, the materials selected for each stage of the upper and lower electrodes are also symmetrically arranged along the insulating reaction tube to maintain uniformity when energized. In one example, each stage of the upper and lower electrodes is made of copper. The number of nested electrodes in each of the upper and lower electrodes is two or three. Each stage of copper electrodes is connected and fixed by insulating screws. The copper electrodes closest to the insulating reaction tube in both the upper and lower electrodes are smaller in volume and can extend into the insulating reaction tube during the reaction to clamp the reactants from top to bottom to provide voltage and control the generation of uniform current in the reactants.

[0030] The buffer protectors are installed on the upper and lower sides of the multi-stage electrodes, specifically fixed to the upper electrode at the top and the lower electrode at the bottom, preferably symmetrically on both sides. Therefore, the buffer protectors, located at both ends of the entire device, primarily buffer the thermal expansion of the reactants during the reaction process. As mentioned above, the reactants in the insulating reaction tube generate heat when energized, and in actual production, the temperature caused by this heat can reach 3000℃, leading to thermal expansion that impacts the electrodes on both sides. By placing the buffer protectors at the upper and lower ends of the upper and lower electrodes, they can receive this vertically diffused thermal expansion and provide buffering, preventing damage to the insulating reaction tube and multi-stage electrodes due to thermal expansion. The preferred symmetrical structure of the buffer protectors ensures uniform stress on both sides of the insulating reaction tube, effectively reducing the breakage rate on one side.

[0031] In addition, the buffer protector can also be used to carry reactants before the reaction. For example, the upper end of the portion above the insulated reaction tube can be a plate-like structure that can be used to place and store reactants.

[0032] The buffer protector can be made of any elastic and load-bearing metal material such as tungsten steel, carbon steel, manganese steel, chromium vanadium steel, silicon manganese steel, and stainless steel. Its shape along the vertical direction is set as a prism or cylinder to receive thermal expansion and provide buffering, so as to prevent the insulating reaction tube from expanding and bursting along the vertical direction.

[0033] A gas shield is used to provide an inert gas environment to the entire equipment, especially the reaction area, so that the reactants are converted into high-purity graphitized carbon black at high temperatures without being disturbed by air. For example, it prevents the reactants from combining with oxygen, nitrogen, water vapor, etc., to produce byproducts or cause combustion. Therefore, the gas shield consists of a detachable outer casing divided into upper and lower parts, which encloses the entire insulated reaction tube, multi-stage electrodes, and buffer protector. The outer casing is filled with an inert gas, such as argon or helium, effectively protecting the entire reaction environment.

[0034] To enhance protection, the gas protection shroud further includes an inner shroud outside the insulated reaction tube. This inner shroud provides an additional inert gas environment to the insulated reaction tube, creating a dual protection for the carbon black reactants within, ensuring the reaction takes place in a high-purity gas environment. The inner shroud is also divided into detachable upper and lower halves, meaning it can be open when not in operation, facilitating the addition of reactants to the insulated reaction tube. Specifically, the inner shroud is nested within and fixed to the multi-stage electrodes. Movement of the multi-stage electrodes causes the nested inner shroud to move. For example, in one embodiment, the upper end of the upper half of the inner shroud is clamped between two electrodes of the upper electrode, and the lower end of the lower half is clamped between two electrodes of the lower electrode, thus fixing the inner shroud to the multi-stage electrodes.

[0035] The gas shield can be made of materials such as stainless steel, cast iron, color steel plate, nylon, acrylic, polyethylene terephthalate, and polycarbonate. Both the inner and outer shields are hollow cuboids or irregular hexahedrons. The preferred material for the gas shield is transparent materials such as acrylic, polyethylene terephthalate, or polycarbonate. The insulating reaction tube can also be made of transparent or near-transparent materials (such as the aforementioned quartz tube), allowing for easy observation of the reaction process from the outside. Furthermore, in one example, an infrared thermometer is installed outside the gas shield. The gas shield and the insulating reaction tube are made of materials with high near-infrared light transmittance at high temperatures, such as polyethylene terephthalate and quartz. The infrared thermometer can monitor whether the reaction temperature inside the insulating reaction tube has reached the expected level, effectively improving the overall reaction efficiency of the equipment.

[0036] The electrothermal treatment equipment for graphitizing carbon black mixed with plastics according to an embodiment of this application also has a lifting and adjusting component for controlling the movement of multi-stage electrodes and a gas protective cover, used to control the reaction process. Specifically, the lifting and adjusting component includes multiple transmission devices and corresponding controllers for the transmission devices. The multiple transmission devices are connected to the multi-stage electrodes, for example, by means of insulating screws, and are used to separate the upper and lower electrodes during non-reaction times, and to control the upper and lower electrodes to compact the carbon black raw material reactants in the insulating reaction tube from both sides before the reaction begins. When the upper and lower electrodes separate, the upper and lower parts of the inner cover are also separated to allow the raw material or inert gas to be added into the insulating reaction tube. Before the reaction begins, the upper and lower electrodes are controlled to move closer to each other to compact the reactants. During this process, the upper and lower parts of the inner cover are connected and closed to form an inert protective environment outside the insulating reaction tube.

[0037] In one example, the transmission device of the lifting adjustment component is connected to the upper electrode and can be used under the control of the controller to drive the upper electrode closer to or further away from the lower electrode. When the carbon black raw material reactant is placed on the lower electrode in the insulating reaction tube, the upper electrode can be controlled to move downwards to approach the lower electrode to compact the reactant together with the lower electrode, or the upper electrode can be controlled to move away from the lower electrode to stop the reaction. Simultaneously, the top of the upper half of the inner cover is nested and fixed between the two electrodes of the upper electrode, so that the entire upper half moves closer to or further away from the lower half of the inner cover along with the upper electrode. Before the reaction starts, the upper half of the inner cover can be controlled to approach the lower half of the inner cover to finally close the upper and lower halves of the inner cover, or the inner cover can be separated after the reaction ends.

[0038] In the above example, a detachable connection configuration, such as a snap-fit ​​connection or a magnetic connection, can be provided at the edges where the upper and lower halves of the outer cover and the inner cover abut against each other. Preferably, a magnetic connection configuration is provided at least part of the edges where the upper and lower halves of the outer cover and the inner cover abut against each other; more preferably, the magnetic connection configuration is evenly distributed to ensure good airtightness when the two are closed.

[0039] The controller for the lifting and adjusting component may include a processor and a memory. The memory stores a set of program instructions. When the processor executes this set of instructions, it can control multiple transmission devices, such as controlling the transmission devices to drive the upper electrode upwards / moves. The processor's execution of the program instruction set can be triggered by the user interface provided by the electrothermal treatment equipment for carbon black mixed with plastic graphitization according to embodiments of this application. For example, an operator can trigger the processor to control the movement of the transmission devices on corresponding components through buttons, keypads, human-machine interfaces, and / or remote controls provided by the electrothermal treatment equipment for carbon black mixed with plastic graphitization according to embodiments of this application, thereby controlling the entire reaction process. Alternatively, the entire process can be controlled without the user interface; instead, only the processor is triggered to run the program instruction set. The processor will control the transmission devices to automatically drive the movement of multiple electrodes and the inner casing within the response time according to the set time in the program instruction set, thereby achieving an automated process. The processor may be an embedded CPU, a mobile CPU, an FPGA, etc.

[0040] The following provides an example of the use of an electrothermal treatment apparatus for graphitizing carbon black mixed plastics according to an embodiment of this application.

[0041] refer to Figure 1According to the embodiments of this application, the electrothermal treatment equipment for graphitization of carbon black mixed plastics is assembled in sequence with an insulating reaction tube, a buffer protector, a multi-stage electrode, a gas protection cover, and a lifting adjustment component. The multi-stage electrodes are connected to each other, the buffer protector is connected to the multi-stage electrodes, and the lifting adjustment component is connected to the multi-stage electrodes using insulating screws. Both the upper and lower electrodes are connected to a DC power supply. The carbon black raw material reactant is placed on the upper end of the buffer protector located on the upper side of the insulating reaction tube.

[0042] Then, the lifting and adjusting mechanism is activated, and its driving function is used to pull the upper part of the outer and inner covers of the upper electrode and gas protective cover upwards. The carbon black raw material reactant is transferred from the buffer protector into the insulating reaction tube and placed on the upper end of the lower electrode. Then, the lifting and adjusting mechanism uses its driving function to lower the upper electrode, compacting the reactant, while simultaneously lowering the upper part of the gas protective cover to connect and seal it with the lower part. Inert gas is introduced for a certain period of time, and the multi-stage electrode supplies electricity to the carbon black raw material reactant to start the electrothermal treatment and execute the graphitization process of the reactant.

[0043] Specifically, it is preferable to configure the upper electrode to make good contact with the reactants after they are compacted when the reactants are placed in the tube, and the length of the upper electrode inside the insulated reaction tube should exceed 10 mm to ensure sufficient contact between the upper and lower electrodes and the reactants. Various models of the diameter of the insulated reaction tube and the dimensions of the multi-stage electrodes can be configured to meet the above requirements.

[0044] During the graphitization process, the working principle of the electrothermal treatment equipment for graphitizing carbon black mixed plastics is as follows: after the reactants are loaded into the insulated reaction tube, they are compacted. Due to the close contact with the multi-stage electrodes and the inert atmosphere, a uniformly distributed current is generated in these reactants after the multi-stage electrodes apply a pulse voltage. Heat is generated by their resistance through the Joule effect, and the temperature can be raised to about 3000°C within a few seconds. At this temperature, the carbon black raw material can be converted into highly graphitized carbon black.

[0045] Finally, after a certain reaction time, the multi-stage electrodes are de-energized, and the product is cooled in an inert atmosphere to obtain the graphitized product. The lifting adjustment component is then activated, and its driving function is used to open the multi-stage electrodes and the inner cover. After the temperature is safe, the graphitized carbon black is removed.

[0046] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0047] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0048] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0049] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0050] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. An electrothermal treatment device for graphitizing carbon black mixed plastics, characterized in that, include: An insulated reaction tube, used to contain carbon black raw materials; A multi-stage electrode includes an upper electrode and a lower electrode symmetrically arranged on the upper and lower sides of the insulating reaction tube along the length of the insulating reaction tube, wherein the upper electrode and / or the lower electrode is a nested combination of segmented electrodes, used for electrically heating carbon black raw materials; A buffer protector, used to buffer the thermal expansion forces applied to the carbon black raw material from the top and bottom sides during the reaction; A gas shield is used to provide an inert protective atmosphere and isolate air from the insulating reaction tube and the multi-stage electrodes; A lifting and adjusting component, which is connected to the multi-stage electrode and the gas protective cover, is used to move the multi-stage electrode and / or the gas protective cover.

2. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 1, wherein, The segmented electrode includes at least two stages of electrodes; At least one of the segmented electrodes extends into the interior of the insulating reaction tube, with one side in contact with the carbon black raw material and the other side nested with the remaining electrodes.

3. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 1, wherein, The upper electrode and the lower electrode are either the same conductive element or a conductive composite material, or different conductive elements or conductive composite materials.

4. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 1, wherein, The buffer protectors are symmetrically arranged on the upper and lower sides of the multi-stage electrodes; The buffer protector is also used to hold the carbon black raw material to be processed.

5. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 4, wherein, The buffer protector is made of a load-bearing material with metallic elasticity; The buffer protector is made of tungsten steel, carbon steel, manganese steel, chromium vanadium steel, silicon manganese steel, or stainless steel.

6. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 1, wherein, The gas protection cover includes an inner cover and an outer cover. The inner cover is used to enclose the insulating reaction tube, and the outer cover is used to completely enclose the insulating reaction tube, the multi-stage electrode, the buffer protector, and the lifting and adjusting component.

7. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 6, wherein, The inner cover is composed of an upper half cover and a lower half cover, and the lifting adjustment component is connected to at least one of the upper half cover and the lower half cover to pull it to move in the vertical direction. The upper half of the cover and the lower half of the cover are detachably connected.

8. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 7, wherein, The lifting and adjusting component has multiple actuators and corresponding controllers for driving the upper electrode, the lower electrode, the upper half cover and / or the lower half cover to move in the vertical direction.

9. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 2, wherein, Each electrode in the multi-stage electrode system is connected to the other electrodes, the buffer protector is connected to the multi-stage electrode system, and / or the lifting adjustment component is connected to the multi-stage electrode system via insulating screws.

10. The electrothermal treatment equipment for graphitizing carbon black mixed plastics according to claim 1, wherein, The insulating reaction tube is made of transparent material; It also includes an infrared thermometer, which is installed outside the gas protective cover to monitor the temperature inside the insulating reaction tube.

Images