Multi-electrode vertical continuous graphitization furnace

Abstract

A multi-electrode vertical continuous graphitization furnace comprises a heating furnace body, positive electrodes, negative electrodes, a cooling furnace body, a feeding port and a discharging port, the number of the negative electrodes is more than two, the negative electrodes are horizontally placed, the distance between the negative electrodes and the positive electrodes can be adjusted through horizontal twitching, and currents flowing through the negative electrodes are basically equal. The inside of the heating furnace body is not deflected, and balanced heating of all parts inside the heating furnace body is achieved; the device has the beneficial effects that the negative electrodes are multi-stage, the current is dispersed to each negative electrode, the temperature in the hearth is balanced, the graphitization purity of the produced product is high, the distance between the negative electrodes and the positive electrode is adjusted through horizontal twitch after the negative electrodes are corroded and worn, the current flowing through each negative electrode is basically equal, and the inside of the heating furnace body is kept free of bias current; balanced heating of all parts in the heating furnace body is realized; the production efficiency is high and the production cost is low; the negative electrode is convenient to replace after being corroded and abraded and does not need to be replaced after being cooled, and maintenance time is shortened.

Description

Technical Field

[0001] The utility model relates to a graphitization furnace, in particular to a multi-electrode vertical continuous graphitization furnace. Background Art

[0002] At present, graphitization production refers to the process of converting the irregular arrangement of carbon atoms into a regularly arranged hexagonal plane network structure, i.e., graphite microcrystalline structure, at high temperature. The purpose is to obtain the properties of graphite such as high electrical conductivity, high thermal conductivity, corrosion resistance, and friction resistance. The graphitization temperature can be as high as 3000°C. The higher the temperature, the more perfect the graphitization microcrystalline structure is. Graphite is one of the main materials for graphite batteries.

[0003] At present, there are four main types of furnaces used in the graphitization process: Acheson graphitization furnace, internal string graphitization furnace, box-type graphitization furnace and continuous graphitization furnace. Among them, Acheson graphitization furnace, internal string graphitization furnace and box-type graphitization furnace adopt intermittent production process, and continuous graphitization furnace adopts continuous production process.

[0004] The Acheson furnace is to place the carbonaceous negative electrode material in a single-hole (1-hole crucible) crucible, then place the crucible in the graphitization furnace and install resistor materials as resistors, and then install insulation materials on both sides and the upper cover to complete graphitization by power transmission. The internal series graphitization furnace is to place the carbonaceous negative electrode material in a porous crucible (9-hole crucible), and then connect the crucibles end to end in series and place them in the graphite furnace, and then install insulation materials on both sides and the upper cover to complete graphitization by power transmission. The box-type graphitization furnace is to directly load the carbonaceous negative electrode material into a large box that has been pre-installed with carbon plates or graphite plates, and then add carbon or graphite cover plates as resistors, and then install insulation materials on the top and both sides to complete graphitization by power transmission. The continuous graphitization furnace is to continuously add carbonaceous negative electrode materials into the graphitization furnace cavity. There is no power outage process during production. The graphitized material passes through a series of temperature zones, thereby achieving continuous graphitization.

[0005] The current continuous graphitization furnace is a vertical structure, with the positive electrode and negative electrode inside being a pair of monopolar settings. Figure 1It is a structural schematic diagram of a vertical continuous graphitization furnace in the prior art. The vertical continuous graphitization furnace in the prior art comprises a heating furnace body 1, a positive electrode 2, a negative electrode 3, a cooling furnace body 4, a feed port 5, and a discharge port 6. The cooling furnace body 4 has a heating furnace body 1, and the heating furnace body 1 has an insulating lining 7, a positive electrode 2, and a negative electrode 3. The negative electrode 3 is led out of the furnace by a conductor 9 and connected to the negative pole of a power supply; a feed port 5 and a flue gas duct 6 are provided on the upper part of the heating furnace body 1; a water cooling duct 8 is provided in the cooling furnace body 4, and the negative electrode 3 in the prior art is a single negative electrode 3 placed vertically. The material enters the vertical graphitization furnace from the feed port for graphitization. Since the electrode is in the center, the current is also concentrated in the center, resulting in low peripheral temperature and low graphitization purity of the product. Especially after the electrode is corroded and worn, it is easy to cause bias flow, the distance between the positive and negative electrodes will increase, the current will decrease, the furnace temperature will decrease, and the graphitization purity of the product will be further reduced. Since it is a pair of single electrodes, the diameter inside the furnace is low and the production efficiency is low. In addition, it is very difficult to replace the electrode after corrosion and wear, and it needs to be cooled before replacement. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and provide a multi-electrode vertical continuous graphitization furnace.

[0007] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A multi-electrode vertical continuous graphitization furnace comprises a heating furnace body, a positive electrode, a negative electrode, a cooling furnace body, a feed port and a discharge port. The cooling furnace body is provided with a heating furnace body, the heating furnace body is provided with an insulation lining, a positive electrode and a negative electrode, and the upper part of the heating furnace body is provided with a feed port and a flue gas duct; the cooling furnace body is provided with a water cooling duct, and is characterized in that: the negative electrode is two negative electrodes placed horizontally, and the distance between the negative electrode and the positive electrode can be adjusted by horizontal pulling, so that the current flowing through each negative electrode is basically equal, the internal flow of the heating furnace body is kept non-biased, and balanced heating is achieved everywhere inside the heating furnace body.

[0009] According to the multi-electrode vertical continuous graphitization furnace described above, it is characterized in that the negative electrode is more than two electrodes.

[0010] According to the multi-electrode vertical continuous graphitization furnace described above, it is characterized in that: the negative electrode is externally connected to a hydraulic mechanism, and the negative electrode is horizontally pumped by the hydraulic mechanism to adjust the distance between the negative electrode and the positive electrode, so that the current flowing through each negative electrode is basically equal, the internal flow of the heating furnace body is kept non-biased, and balanced heating is achieved in various places inside the heating furnace body.

[0011] According to the multi-electrode vertical continuous graphitization furnace described above, it is characterized in that: the negative electrode is externally connected with a wire sleeve, a lead screw, and a motor, the motor drives the lead screw to rotate, pulls the wire sleeve to move, drives the negative electrode to horizontally twitch and adjust the distance between it and the positive electrode, so that the current flowing through each negative electrode is basically equal, keeps the heating furnace body from biasing, and realizes balanced heating everywhere inside the heating furnace body.

[0012] Compared with the prior art, the utility model has the following beneficial effects: the negative electrode 3 is multi-stage and not in the center, the current is dispersed to each negative electrode, the temperature inside the furnace is balanced, the graphitized product produced has high purity, and after the negative electrode is corroded and worn, the distance between the negative electrode and the positive electrode 2 is adjusted by horizontal pumping, so that the current flowing through each negative electrode 3 is basically equal, the inside of the heating furnace body 1 is kept free of bias, and balanced heating is achieved in various places inside the heating furnace body 1; due to the multiple negative electrodes, the inner diameter of the furnace is large, the production efficiency is high, and the production cost is low; the negative electrode is easy to replace after corrosion and wear, and does not need to be replaced after cooling, which shortens the maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of a vertical continuous graphitization furnace in the prior art;

[0014] Figure 2 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0015] Figure 3 yes Figure 2 Schematic diagram of the AA section;

[0016] Figure 4 It is a structural schematic diagram of Embodiment 2 of the present utility model;

[0017] Figure 5 yes Figure 4 Schematic diagram of the BB section;

[0018] Figure 6 It is a structural schematic diagram of Embodiment 3 of the present utility model;

[0019] Figure 7 It is a structural schematic diagram of embodiment 4 of the present utility model.

[0020] Symbol Description:

[0021] 1. Heating furnace body; 2. Positive electrode; 3. Negative electrode; 4. Cooling furnace body; 5. Feed inlet; 6. Flue gas duct; 7. Insulation lining; 8. Water cooling duct; 9. Conductor; 10. Discharge port; 11. Hydraulic mechanism; 12. Motor; 13. Screw; 14. Thread sleeve. DETAILED DESCRIPTION

[0022] Example 1

[0023] Figure 2 It is a structural schematic diagram of Embodiment 1 of the present utility model, Figure 3 yes Figure 2 Schematic diagram of AA section; the utility model is a multi-electrode vertical continuous graphitization furnace, including a heating furnace body 1, a positive electrode 2, a negative electrode 3, a cooling furnace body 4, a feed port 5, and a discharge port 10. The cooling furnace body 4 has a heating furnace body 1, and the heating furnace body 1 has an insulation lining 7, a positive electrode 2, and a negative electrode 3. The upper part of the heating furnace body 1 has a feed port 5 and a flue gas duct 6; the cooling furnace body 4 has a water cooling pipe 8. The difference from the prior art is that: the negative electrode 3 is two negative electrodes 3 placed horizontally, and the negative electrode 3 can adjust the distance between the positive electrode 2 by horizontal pulling, so that the current flowing through each negative electrode 3 is basically equal, so that the inside of the heating furnace body 1 is kept free of biased current, and balanced heating is achieved in various places inside the heating furnace body 1.

[0024] Example 2

[0025] Figure 4 It is a schematic diagram of the structure of Embodiment 2 of the present utility model. Figure 5 yes Figure 4 Schematic diagram of BB section; a multi-electrode vertical continuous graphitization furnace according to Example 1, characterized in that: the negative electrode 3 is four negative electrodes 3 placed horizontally to achieve more balanced heating inside the heating furnace body 1; the multi-electrode described in the utility model refers to more than two negative electrodes 3, and can also be 3, 5, 6, etc.

[0026] Example 3

[0027] Figure 6 It is a structural schematic diagram of Example 3 of the utility model; a multi-electrode vertical continuous graphitization furnace according to Example 1 and Example 2, characterized in that: the negative electrode 3 is externally connected to a hydraulic mechanism 11, and the negative electrode 3 is horizontally pumped by the hydraulic mechanism 11 to adjust the distance between the negative electrode 3 and the positive electrode 2, so that the current flowing through each negative electrode 3 is basically equal, the internal flow of the heating furnace body 1 is kept non-biased, and balanced heating is achieved in various places inside the heating furnace body 1.

[0028] Example 4

[0029] Figure 7 It is a structural schematic diagram of Example 4 of the utility model; a multi-electrode vertical continuous graphitization furnace according to Example 1 and Example 2, characterized in that: the negative electrode 3 is externally connected to a wire sleeve 14, a lead screw 13, and a motor 12, the motor 12 drives the lead screw 13 to rotate, pulls the wire sleeve 14 to move, drives the negative electrode 3 to horizontally pull and adjust the distance between it and the positive electrode 2, so that the current flowing through each negative electrode 3 is basically equal, keeps the heating furnace body 1 from biasing, and realizes balanced heating of the heating furnace body 1.

[0030] The beneficial effects of the utility model are as follows: the negative electrode 3 is multi-stage and not in the center, the current is dispersed to each negative electrode, the temperature inside the furnace is balanced, the graphitized product produced has high purity, and after the negative electrode is corroded and worn, the distance between the negative electrode and the positive electrode 2 is adjusted by horizontal pumping, so that the current flowing through each negative electrode 3 is basically equal, the internal flow of the heating furnace body 1 is kept non-biased, and balanced heating is achieved in various places inside the heating furnace body 1; due to the multiple negative electrodes, the internal diameter of the furnace is large, the production efficiency is high, and the production cost is low; the negative electrode is easy to replace after corrosion and wear, and does not need to be cooled before replacement, which shortens the maintenance time.

Claims

1. A multi-electrode vertical continuous graphitization furnace, comprising a heating furnace body, a positive electrode, a negative electrode, a cooling furnace body, a feed port, and a discharge port. The cooling furnace body has a heating furnace body, and the heating furnace body has a heat preservation lining, a positive electrode, and a negative electrode. The upper part of the heating furnace body has a feed port and a flue gas duct; the cooling furnace body has a water cooling duct, and is characterized in that: The negative electrodes are two horizontally placed negative electrodes, and the distance between the negative electrodes and the positive electrodes can be adjusted by horizontal pulling, so that the current flowing through each negative electrode is basically equal, keeping the internal flow of the heating furnace body non-biased and achieving balanced heating everywhere inside the heating furnace body.

2. The multi-electrode vertical continuous graphitization furnace according to claim 1, characterized in that: The negative electrode is composed of more than two electrodes.

3. A multi-electrode vertical continuous graphitization furnace according to any one of claim 1 or claim 2, characterized in that: The negative electrode is externally connected to a hydraulic mechanism, which horizontally pulls the negative electrode to adjust the distance between the negative electrode and the positive electrode, so that the current flowing through each negative electrode is basically equal, keeping the internal flow of the heating furnace body non-biased, and achieving balanced heating everywhere inside the heating furnace body.

4. A multi-electrode vertical continuous graphitization furnace according to any one of claim 1 or claim 2, characterized in that: The negative electrode is externally connected to a wire sleeve, a lead screw, and a motor. The motor drives the lead screw to rotate, pulls the wire sleeve to move, and drives the negative electrode to move horizontally to adjust the distance between it and the positive electrode, so that the current flowing through each negative electrode is basically equal, keeping the internal flow of the heating furnace body from biased, and achieving balanced heating everywhere inside the heating furnace body.

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