CN220062586U - Furnace body structure, graphitization furnace and battery production system - Google Patents

Abstract

The utility model relates to a furnace body structure, a graphitizing furnace and a battery production system, which comprises a furnace body and a material limiting structure, wherein the furnace body is provided with a heating zone, the material limiting structure is arranged in the furnace body and is surrounded to form a material limiting channel for material flow, and the material limiting channel is provided with a heating section positioned in the heating zone. According to the technical scheme provided by the embodiment of the utility model, after the material enters the furnace body, the material flows along the material limiting channel of the material limiting structure, and when the material flows through the heating section, the material can be heated by the heating section. Under the guidance of the heating section, all materials can pass through the heating section, and the materials are sequentially conveyed to the same area of the heating section under the limitation of the heating section of the material limiting channel, so that the flowing time and the heating condition of the materials in the heating section are basically consistent, the materials are heated uniformly, and the quality consistency of the heated products is good.

Description

Furnace body structure, graphitization furnace and battery production system

Technical Field

The utility model relates to the technical field of heat treatment furnaces, in particular to a furnace body structure, a graphitization furnace and a battery production system.

Background

The heat treatment furnace is a furnace body structure for providing a processing environment for materials, and is widely applied to various production fields, such as graphitization furnaces, smelting furnaces, reaction furnaces and the like, and is generally used for providing a heating environment, and when the materials are heated and treated in the heat treatment furnace, if the materials are heated unevenly, the uniformity of product quality is easily reduced.

Disclosure of Invention

In view of the above problems, the present utility model provides a furnace body structure, a graphitizing furnace and a battery production system, which can alleviate the problem of reducing the consistency of product quality due to uneven heating of materials.

In a first aspect, the utility model provides a furnace body structure, comprising a furnace body and a material limiting structure, wherein the furnace body is provided with a heating zone, the material limiting structure is arranged in the furnace body and is surrounded to form a material limiting channel for material flow, and the material limiting channel is provided with a heating section positioned in the heating zone.

According to the technical scheme provided by the embodiment of the utility model, after the material enters the furnace body, the material flows along the material limiting channel of the material limiting structure, and when the material flows through the heating section, the material can be heated by the heating section. Under the guidance of the heating section, all materials can pass through the heating section, and the materials sequentially pass through the same region of the heating section under the limitation of the heating section of the material limiting channel, so that the flowing time of the materials in the heating section is basically consistent with the heating conditions (such as magnetic field intensity, temperature, electric field intensity and the like), the materials are heated uniformly, and the quality consistency of the heated products is good.

In some embodiments, the furnace structure includes a positive electrode body and a negative electrode body disposed in the furnace body at intervals, the heating zone is located between the positive electrode body and the negative electrode body, and the positive electrode body and the negative electrode body are configured to directly heat a material flowing through the heating zone under an energized condition. At this time, the furnace body structure is suitable for the heating to the conductor material, and simultaneously, the mode that material resistance generates heat is suitable for the higher demand of heating temperature.

In some embodiments, the positive electrode body and the negative electrode body are disposed opposite to each other in the extending direction of the material limiting channel, and the positive electrode body is located on a side where an inlet end of the material limiting channel is located, and the negative electrode body is located on a side where an outlet end of the material limiting channel is located. Because the positive electrode body and the negative electrode body are opposite in the extending direction of the material limiting channel, and the arrangement direction is the same as the drainage direction of the material limiting channel, the electric field force of the heating electric field between the positive electrode body and the negative electrode body is approximately along the drainage direction, and when the material flows through the heating section, the flowing direction of the material is approximately the same as the electric field force, the influence of the material deflection flow is smaller due to the electric field force, and the material flow is smoother.

In some embodiments, along the extending direction of the material limiting channel, an outer contour of an end of the negative electrode body facing the positive electrode body projects beyond a projection of the heating section. At this time, a heating electric field having a substantially truncated cone shape or an umbrella shape is formed between the positive electrode body and the negative electrode body, and the heat energy utilization rate is high, and the energy is relatively saved.

In some embodiments, the positive electrode body extends into the material limiting channel, and the negative electrode body is located outside the material limiting channel. When the anode body stretches into the material limiting channel and the cathode body is positioned outside the material limiting channel, the distance between the anode body and the cathode body is relatively short, the strength of the generated electric field is relatively high, more heat energy can be generated when materials pass through the heating section, and the heating efficiency of the materials is relatively high.

In some embodiments, the anode body has a feed-through in communication with the feed-limiting channel. The negative electrode body is provided with the material passing hole, the material can directly flow to the discharging side of the furnace body structure through the material passing hole, the flow path of the material can be shortened, and the material circulation is smoother.

In some embodiments, the cross-sectional projections of the confining channels are identical everywhere along the direction of extension of the confining channels. At this moment, limit material passageway is the runner always, and limit material passageway's processing is simpler, easily shaping, helps reduce cost, and the limit material passageway of direct current way formula helps reducing the flow resistance of material for the feed rate of material improves the production efficiency of furnace body structure.

In some embodiments, the furnace body has a feed end, the feed end and an inlet end of the confining channel are spaced apart in an extension direction of the confining channel and form a transition space. The existence of the transition space improves the storage space of the materials in the furnace body, can improve the feeding speed of the materials, and is beneficial to improving the production yield of the furnace body.

In some embodiments, a volatilization channel which is communicated with the transition space and the outside of the furnace body is arranged on the furnace body. For materials that are treated to produce volatile materials (e.g., graphitized materials), the volatile materials flow from the heating section toward the transition space and finally exit the furnace through the volatilization channel. The volatile material can flow out through the arrangement of the volatile channel, so that the coking degree of the volatile material in the furnace body is reduced.

In some embodiments, the shortest distance between the inlet end of the confining channel and the feed end of the furnace body is 40mm-50mm. At this time, the material containing body quantity of the furnace body is larger, the length of the heating section is more proper, and the material heating efficiency is better.

In some embodiments, the furnace structure further comprises a thermal insulation structure, the thermal insulation structure being disposed in isolation between the material confinement structures of the furnace. After the material is heated in the heating section, the heat of the material is transferred to the material limiting structure, and under the isolation of the heat preservation structure, the heat of the material limiting structure is rarely transferred to the furnace body, so that the heat dissipation of the material limiting structure is reduced, the heat energy is saved, and the use safety of the furnace body can be improved.

In some embodiments, the insulation structure is filled with insulation particles. At this time, the heat insulation structure is formed by the structure that is filled with heat insulation particles, and the shaping is comparatively convenient.

In some embodiments, the insulating particles have a particle size in the range of 10mm to 30mm. At this time, the heat-insulating effect and the preparation cost of the heat-insulating particles are good.

In some embodiments, the end face of the heat insulation structure facing the feeding end of the furnace body is a drainage end face, the drainage end face encloses to form a drainage channel communicated with the inlet end of the material limiting structure, and the drainage channel is arranged in a flaring mode back to the material limiting structure. Under the drainage of drainage terminal surface, the material can be smooth and easy in entering into the limit material passageway, and then helps providing the production efficiency of furnace body.

In some embodiments, the furnace structure further comprises a temperature resistant structure, the temperature resistant structure being disposed in isolation between the furnace and the thermal insulation structure. At this time, set up temperature resistant structure between furnace body and insulation structure, can reduce the risk that the furnace body was burnt.

In some embodiments, the resistivity of the material confinement structure is higher than the resistivity of the negative electrode body. When the resistivity of the material limiting structure is higher than that of the negative electrode body, current is conducted between the positive electrode body and the negative electrode body and a heating electric field is formed, so that the heating uniformity of materials is guaranteed, and the quality consistency of products is improved.

In a second aspect, the present utility model provides a graphitizing furnace comprising the furnace body structure of the above embodiments.

In a third aspect, the present utility model provides a battery production system including the graphitization furnace in the above embodiment.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model in order that the same may be more clearly understood and to make the same and other objects, features and advantages of the present utility model more readily apparent.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the utility model. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic diagram of a furnace structure in accordance with one or more embodiments;

FIG. 2 is a schematic diagram of a furnace structure in accordance with one or more embodiments;

FIG. 3 is a schematic diagram of a furnace structure in accordance with one or more embodiments.

Reference numerals in the specific embodiments are as follows:

a furnace body structure 100; a furnace body 10; heating zone Q; a material passing channel W; a feed end 11; a transition space K; a volatilization channel R; a positive electrode body 20; a negative electrode body 30; a passing hole 31; a material limiting structure 40; a material limiting channel 41; a heating section 42; a thermal insulation structure 50; a drainage end face 51; drainage channel 52; a temperature resistant structure 60; a support 70.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model; the terms "comprising" and "having" and any variations thereof in the description of the utility model and the claims and the description of the drawings above are intended to cover a non-exclusive inclusion.

In the description of embodiments of the present utility model, the technical terms "first," "second," and the like are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present utility model, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the utility model. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present utility model, the term "and/or" is merely an association relationship describing an association object, and indicates that three relationships may exist, for example, a and/or B may indicate: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present utility model, the term "plurality" means two or more (including two), and similarly, "plural sets" means two or more (including two), and "plural sheets" means two or more (including two).

In the description of the embodiments of the present utility model, the orientation or positional relationship indicated by the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplification of the description, and do not indicate or imply that the apparatus or element referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present utility model.

In the description of the embodiments of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like should be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present utility model will be understood by those of ordinary skill in the art according to specific circumstances.

There are various ways in which the heat treatment furnace may achieve heating of the material, such as resistance wire heating, infrared heating, electromagnetic heating, etc., which can be heated when the material is located in a heating zone within the heat treatment furnace. One way in which the material is heated is by placing the material in a heated zone within a heat treatment furnace through a carrier. Another way of heating the material is to heat the material in a flowing state through a heating zone in the heat treatment furnace. If a part of materials cannot pass through the heating zone or the time of the materials in the heating zone is uneven, the heating uniformity of the materials is poor, and the consistency of the product quality is poor.

In order to alleviate the problem that the uniformity of product quality is reduced because of the material is heated unevenly, can be at the inside design limit material structure of furnace body for restrict the flow path of the material that flows, and send the material that flows in the zone of heating evenly, not only improved the probability that the material passes through the zone of heating, but also can make the material pass through the zone of heating's time basically unanimous, the material is heated comparatively evenly.

Based on the above consideration, the inventor of the present utility model has designed a furnace body structure, in which a material limiting structure is provided in the furnace body, the material limiting structure has a material limiting channel for material to flow, the material limiting channel guides the material to pass through the heating zone, substantially all the material can pass through the heating zone, and the time of passing through the heating zone is uniform, so that the material can be uniformly heated, the uniformity of heating the material is improved, and the uniformity of product quality is improved.

The furnace body structure provided by the embodiment of the utility model is applied to a heat treatment furnace, the heat treatment furnace can be a graphitization furnace, a smelting furnace, a reaction furnace and the like, and the heating mode of the heat treatment furnace is not limited to the infrared heating, the resistance wire heating and the like. Those skilled in the art can flexibly apply the furnace body structure according to the embodiment of the present utility model to various types of heat treatment furnaces according to the actions and effects thereof.

The furnace body structure of the embodiment of the utility model can be applied to a graphitization furnace. Graphitization furnaces are equipment for producing graphitized powder, which is an important industrial material, and are often used for carburants for ferrous metallurgy, cathode carbon blocks for nonferrous metal electrolytic tanks, prebaked anodes and diamond products, and are often applied to preparation of graphite cathode materials in the field of battery production. The specific structural form of the graphitizing furnace is not particularly limited in the embodiment of the utility model.

The battery production system according to the embodiment of the utility model can be used for producing lithium batteries, solar batteries, fuel batteries and the like, but is not limited to the battery production system.

The furnace structure provided in the embodiment of the utility model is described in detail below.

Referring to fig. 1, 2 and 3, a furnace structure 100 according to an embodiment of the present utility model includes a furnace 10 and a material limiting structure 40, the furnace 10 has a heating zone Q, the material limiting structure 40 is disposed in the furnace 10 and encloses a material limiting channel 41 for material flow, and the material limiting channel 41 has a heating section 42 located in the heating zone Q.

The furnace body 10 is a structure of a heat treatment furnace for providing a processing environment for materials, and in general, the processing environment provided by the furnace body 10 is isolated from the atmosphere, and the processing environment provided by the furnace body can be a vacuum environment, an atmosphere environment (such as nitrogen atmosphere, inert gas atmosphere, reducing atmosphere) or the like, and is specifically set according to processing requirements. Generally, the furnace body 10 includes a furnace shell, which is typically made of a metallic material, is strong and lightweight. The heat preservation and insulation structure can be arranged in the furnace shell, so that the heat dissipation in the furnace body 10 can be reduced, the surface temperature of the furnace shell is lower, and the energy conservation and the scalding risk can be reduced.

The heating zone Q is the core temperature region of the furnace body 10 and is the main working space for heating the material, and the material can reach the highest heating temperature when passing through the core temperature region. Typically, heating elements are provided within the furnace body 10, which may form a heating zone Q within the furnace body 10, the manner in which the heating zone Q is formed being dependent upon the type of heating element. For example, when the heating element is a resistance wire, the heating zone Q is mainly determined by a heat radiation area of the resistance wire. When the heating element is a solenoid, the heating zone Q is primarily determined by the magnetic field area of the solenoid. Of course, the type of heating element depends on the nature of the material.

The material limiting structure 40 is arranged in the furnace body 10 and surrounds to form a material limiting channel 41. The material entering the furnace body 10 passes through the heating zone Q under the drainage of the material limiting passage 41. Since the material limiting structure 40 needs to pass through the heating zone Q, the material limiting structure 40 is generally made of a material with high temperature resistance, for example, the material limiting structure 40 is made of a material with high temperature resistance, and the material with high temperature resistance includes a clay brick with high temperature resistance, quartz sand, an alumina brick, a carbon brick, concrete, silicon carbide, various temperature resistant fibers, etc., and the specific type is not limited, and the conventional components in the field can be selected.

Typically, the material limiting channel 41 extends linearly, so that the material limiting channel 41 is more convenient to form and is beneficial to the flow of materials. Of course, the material limiting channel 41 may also extend in a curved manner. In the extending direction of the material limiting passage 41, the material limiting structure 40 may be integrally formed, or may be formed by stacking a plurality of material limiting portions, which is not particularly limited. The cross section of the material limiting passage 41 perpendicular to the extending direction may be circular, square, polygonal, etc.

The heating section 42 is located entirely within the heating zone Q, i.e., such that material flowing along the heating section 42 is able to flow substantially entirely through the heating zone Q. The heating section 42 may be a section of the material limiting passage 41 in the extending direction thereof, or may be the material limiting passage 41 itself. Alternatively, the number of the heating sections 42 in the material limiting passage 41 may be plural. For example, the material limiting channel 41 comprises a plurality of sections of heating sections 42 which are arranged in a bending manner, materials can be heated when passing through one heating section 42, the heating time of the materials is long, and the heating effect is good. The space occupied by the heating section 42 in the heating region Q may be up to 100% or less than 100%. That is, the material associated with heating section 42 may pass through the entire region of heating zone Q or may pass through only a partial region of heating zone Q. Of course, when the material in the heating section 42 passes through the entire area of the heating zone Q, the heating zone Q has a high energy utilization rate and a high heating efficiency of the material.

In the furnace body structure 100, after the material enters the furnace body 10, the material flows along the material limiting channel 41 of the material limiting structure 40, and when the material flows through the heating section 42, the material can be heated by the heating area Q. Under the guidance of the heating section 42, substantially all materials can pass through the heating section Q, and the materials sequentially pass through the same region of the heating section Q under the limitation of the heating section 42 of the material limiting channel 41, so that the flowing time of the materials in the heating section Q is basically consistent with the heating conditions (such as magnetic field intensity, temperature, electric field intensity and the like), the materials are heated uniformly, and the quality consistency of the heated products is good.

In some embodiments, referring to fig. 1, 2 and 3, the furnace structure 100 includes a positive electrode body 20 and a negative electrode body 30, the positive electrode body 20 and the negative electrode body 30 are disposed in the furnace body 10 at intervals, the heating zone Q is located between the positive electrode body 20 and the negative electrode body 30, and the positive electrode body 20 and the negative electrode body 30 are configured to directly heat the material flowing through the heating zone Q under the condition of being electrified.

The "direct heating" means that when the positive electrode body 20 and the negative electrode body 30 are energized, the material itself flows current when passing through the heating zone Q, and joule heat is generated due to self resistance to heat the material, and at this time, the material is equivalent to being connected into a current loop formed by the positive electrode body 20 and the negative electrode body 30.

The positive electrode body 20 and the negative electrode body 30 are conductors, and can conduct electricity. The positive electrode body 20 is used for positive charge, and the negative electrode body 30 is used for negative charge. The positive electrode body 20 and the negative electrode body 30 are not limited to specific materials, and may be metal, graphite, or the like, as is conventional in the art. Meanwhile, the specific configurations of the positive electrode body 20 and the negative electrode body 30 are not limited as long as the materials flowing through the heating region Q can be formed to be directly heated. For example, the positive electrode body 20 and the negative electrode body 30 each have a rod-like structure, such as a round rod, fang Bangzhuang, a prism, or the like, and may have a rod-like structure or a ring-pipe-like structure, and the specific structure of the positive electrode body 20 and the negative electrode body 30 is not limited.

It is understood that the heating zones Q formed by the different structural shapes of the positive electrode body 20 and the negative electrode body 30 are different in range. For example, when the positive electrode body 20 and the negative electrode body 30 are both rod-shaped regions, a heating region having a substantially columnar shape may be formed. For another example, when one of the positive electrode body 20 and the negative electrode body 30 is rod-shaped and the other is ring-shaped, a heating region having a substantially conical shape may be formed.

The anode body 20 and the cathode body 30 are at least partially arranged in the furnace body 10, and can also comprise a part positioned outside the furnace body 10, so that electricity connection between the anode body and the cathode body is facilitated.

When the material flows to the heating zone Q between the positive electrode body 20 and the negative electrode body 30 along the material limiting channel 41, the material itself circulates current to generate heat by resistance, and the direct heating of the material is realized. In this case, the material may be a conductor. Taking the application of the furnace body structure 100 to a graphitization furnace as an example, the self-heating temperature of the material can generally reach 2600 ℃ when the material is heated in the heating zone.

At this time, the furnace structure 100 is suitable for heating the conductive material, and meanwhile, the self-resistance heating mode of the material is suitable for the requirement of higher heating temperature.

For ease of understanding, the material may also be indirectly heated in the heating zone Q in other embodiments, for example. The "indirect heating" is a type of indirect heating in which the material itself cannot generate joule heat, but is heated by heat conduction/heat radiation/heat convection or the like in other heating elements, and the heating is performed by using a resistance wire.

In some embodiments, referring to fig. 1, 2 and 3, the positive electrode body 20 and the negative electrode body 30 are disposed opposite to each other in the extending direction of the material limiting channel 41, and the positive electrode body 20 is located at a side of the inlet end of the material limiting channel 41, and the negative electrode body 30 is located at a side of the outlet end of the material limiting channel 41.

The inlet end of the material limiting channel 41 is the end of the material entering the material limiting channel 41. The outlet end of the material limiting channel 41 is the end of the material flowing out of the material limiting channel 41.

Generally, the extending direction of the material limiting channel 41 is a linear direction, so that the material limiting channel 41 is simpler to process, less energy is required when the material flows in the material limiting channel 41, and the material flowing in the material limiting channel 41 is easier to realize. When the material limiting passage 41 extends from top to bottom in the vertical direction, the inlet end and the outlet end of the material limiting passage 41 are generally disposed opposite to each other up and down, and the positive electrode body 20 and the negative electrode body 30 are opposite to each other up and down. When the material limiting passage 41 extends from left to right in the horizontal direction, the inlet end and the outlet end of the material limiting passage 41 are disposed generally opposite to each other from left to right, and the positive electrode body 20 and the negative electrode body 30 are disposed opposite to each other from left to right.

The positive electrode body 20 is located at the side where the inlet end of the material limiting channel 41 is located, and the negative electrode body 30 is located at the side where the outlet end of the material limiting channel 41 is located, so that the drainage direction of the material limiting channel 41 is directed from the side where the positive electrode body 20 is located to the side where the negative electrode body 30 is located.

Since the positive electrode body 20 and the negative electrode body 30 are opposite in the extending direction of the material limiting channel 41, and the arrangement direction is the same as the drainage direction of the material limiting channel 41, the electric field force of the heating electric field existing between the positive electrode body 20 and the negative electrode body 30 is approximately along the drainage direction, when the material flows through the heating section 42, the flowing direction of the material is approximately the same as the electric field force, the influence of the deflecting flow of the material is smaller due to the electric field force, and the material flowing is smoother.

Of course, in other embodiments, the positive electrode body 20 and the negative electrode body 30 may be arranged oppositely in a direction intersecting or even perpendicular to the extending direction of the material limiting passage 41.

When the positive electrode body 20 is located at the side of the inlet end of the material limiting channel 41, the positive electrode body 20 is located outside the material limiting channel 41 or the positive electrode body 20 is partially located inside the material limiting channel 41. When the negative electrode body 30 is located at the side of the outlet end of the material limiting channel 41, the negative electrode body 30 is located outside the material limiting channel 41 or part of the negative electrode body 30 is located inside the material limiting channel 41.

It will be appreciated that whether or not the positive electrode body 20 and the negative electrode body 30 are positioned in the material limiting passage 41, it is necessary that the outer contour of the end face of one of the two disposed opposite to the other exceeds the flow surface contour of the heating section 42 so that the heating section 42 is positioned in the heating zone Q. In some embodiments (see fig. 2), the positive electrode body 20 and the negative electrode body 30 are both located outside the material limiting channel 41, and the areas of the opposite end surfaces of the positive electrode body 20 and the negative electrode body 30 are larger than the flow area of the heating section 42, and the positive electrode body 20 and the negative electrode body 30 are both rod-shaped structures. In other embodiments (see fig. 3), the positive electrode body 20 and the negative electrode body 30 are both located outside the material limiting channel 41, and only the outer contour dimension of the end surface of the negative electrode body 30 opposite to the positive electrode body 20 exceeds the contour dimension of the flow surface of the heating section 42, the positive electrode body 20 is in a rod-shaped structure, and the negative electrode body 30 is in a ring-tube-shaped structure.

In some embodiments, referring to fig. 1, 2 and 3, along the extending direction of the material limiting channel 41, the outer contour of the end of the negative electrode body 30 facing the positive electrode body 20 is projected beyond the heating section 42.

The end of the negative electrode body 30 facing the positive electrode body 20 is a negative electrode end, and the end of the positive electrode body 20 facing the negative electrode body 30 is a positive electrode end. The outer contour projection of the negative end exceeds the projection of the heating section 42 and the projection of the positive end means that the outer contour projection of the negative end covers the projection of the heating section 42 and exceeds the projection of the heating section 42, and the outer contour projection of the negative end covers the projection of the positive end and exceeds the projection of the positive end.

At this time, a heating electric field having a substantially truncated cone shape or an umbrella shape is formed between the positive electrode body 20 and the negative electrode body 30, and the heat utilization ratio is high, and the energy is relatively saved.

Typically, the negative electrode body 30 is arranged coaxially with the positive electrode body 20. The relation between the outer contour projection of the end of the negative electrode body 30 facing the positive electrode body 20 and the outer contour projection of the end of the positive electrode body 20 facing the negative electrode body 30 along the extending direction of the material limiting passage 41 may be that the former exceeds the latter, or that the latter overlaps the latter, or that the latter exceeds the former, and is not particularly limited as long as the heating zone Q for directly heating the material can be formed.

In some embodiments, referring to fig. 1, the positive electrode body 20 extends into the material limiting channel 41, and the negative electrode body 30 is located outside the material limiting channel 41.

When the anode body 20 stretches into the material limiting channel 41 and the cathode body 30 is positioned outside the material limiting channel 41, the distance between the anode body 20 and the cathode body 30 is relatively short, the strength of the generated electric field is relatively high, and when materials pass through the heating section 42, more heat energy can be generated, so that the material heating efficiency is relatively high. It is understood that, at this time, the outer contour projection of the end of the anode body 30 facing the cathode body 20 exceeds the outer contour projection of the end of the cathode body 20 facing the anode body 30 in the extending direction of the material limiting passage 41.

In some embodiments, referring to fig. 1 and 3, the anode body 30 has a feed hole 31 communicating with a feed limiting channel 41.

Typically, the material passing holes 31 and the material limiting channels 41 are coaxially arranged, and the flow areas of the two are the same, so that the influence on the material flow is reduced. When the material flows out from the outlet end of the material limiting channel 41, the material passes through the material passing hole 31 and then flows to the discharging side of the furnace body structure 100.

The material passing holes 31 are arranged on the cathode body 30, materials can directly flow to the discharging side of the furnace body structure 100 through the material passing holes 31, the flow path of the materials can be shortened, and the material circulation is smoother.

In order to achieve the material passing, in addition to the manner of forming the above-mentioned passing hole 31 in the negative electrode body 30, in other embodiments, referring to fig. 2, a passing channel W is formed in the furnace body 10, the passing channel W is communicated with the outlet end of the material limiting channel 41, the negative electrode body 30 is located in the passing channel W, and the outer wall of the negative electrode body 30 is spaced from the inner wall of the passing channel W. At this time, the material flowing out of the material limiting passage 41 may flow toward the discharge side of the furnace structure 100 through the interval between the anode body 30 and the inner wall of the material passing passage W.

Of course, the manner of implementing the material passing through the anode body 30 is not limited to the solution in the above embodiment, and a person skilled in the art may flexibly set the material passing through the anode body, which is not limited herein.

Alternatively, as shown in fig. 1 to 3, the anode body 30 is supported on a support body 70. The support 70 may also have a function of electrically connecting the anode body 30 with a power source, and the support 70 may be a graphite product. The support 70 may have a rod-like structure, and is not particularly limited.

In some embodiments, referring to fig. 1, 2 and 3, the cross-sectional projections of the material limiting channel 41 are the same along the extending direction of the material limiting channel 41.

Specifically, the cross-sectional shape of the material limiting passage 41 may be circular, square, elliptical, or the like.

At this time, the material limiting channel 41 is a straight channel, so that the processing of the material limiting channel 41 is simpler, the forming is easy, the cost is reduced, and the material limiting channel 41 of the straight channel type is beneficial to reducing the flow resistance of materials, accelerating the feeding speed of the materials and improving the production efficiency of the furnace body structure 100.

In some embodiments, referring to fig. 1, 2 and 3, the furnace body 10 has a feeding end 11, and the feeding end 11 and an inlet end of the material limiting channel 41 are arranged at intervals in the extending direction of the material limiting channel 41 and form a transition space K.

The feeding end 11 is the end of the furnace body 10 for feeding, and a feeding port, a feeding pipeline and the like can be arranged at the feeding end 11. The extending direction of the material limiting channel 41 is approximately consistent with the feeding direction of the feeding end 11, and after the material enters from the feeding end 11, the material passes through the transition space K between the material limiting channel 41 and the feeding end 11 and then enters into the material limiting channel 41.

The transition space K serves as a transition region for material from the feed end 11 into the material-limiting channel 41, the flow area of which is generally greater than the flow area of the material-limiting channel 41, and material can enter the material-limiting channel 41 along the cavity wall of the transition space K.

The existence of the transition space K improves the storage space of the materials in the furnace body 10, can improve the feeding speed of the materials, and is beneficial to improving the production yield of the furnace body 10.

In some embodiments, referring to fig. 1, 2 and 3, a volatilization channel R is disposed on the furnace body 10, and is used for communicating the transition space K and the outside of the furnace body 10.

The volatilization channel R may be a straight channel, a curved channel, or the like, and is not limited. Typically, the volatilization channel R is disposed above the furnace body 10, so as to facilitate the extraction of the light floating volatile substances.

For treating materials that may generate volatile materials (e.g., graphitized materials), the volatile materials flow from the heating section 42 toward the transition space K and finally exit the furnace 10 through the volatilization channel R. The volatile material can flow out through the arrangement of the volatile channel R, so that the coking degree of the volatile material in the furnace body 10 is reduced.

In general, the volatilization channel R is externally communicated with the tail gas treatment system and is used for treating volatile substances flowing out of the volatilization channel R and then evacuating the volatile substances, so that the pollution to the atmosphere is reduced. As for the specific arrangement of the exhaust gas treatment system, there is no limitation in the embodiment of the present utility model, and those skilled in the art can perform conventional arrangements.

Alternatively, referring to fig. 1, 2 and 3, the shortest distance L between the inlet end of the material limiting passage 41 and the feeding end 11 of the furnace body 10 is 40mm-50mm. Preferably, L may be selected to be 42mm, 45mm, 48mm, etc. The shortest distance L here is the shortest vertical distance in the direction opposite to the inlet end 11 of the furnace body 10 at the inlet end of the material limiting passage 41. At this time, the material containing volume of the furnace body 10 is large, the length of the heating section 42 is proper, and the material heating efficiency is good.

In some embodiments, referring to fig. 1, 2 and 3, the furnace structure 100 further includes a heat insulation structure 50, and the heat insulation structure 50 is disposed between the material limiting structures 40 of the furnace 10 in an isolated manner.

The insulating structure 50 is formed of an insulating material, which may be quartz wool, diatomaceous earth, slag wool, expanded perlite, vermiculite, etc., and the specific type of insulating material is not limited and may be selected as is conventional in the art. Typically, the insulating structure 50 surrounds the material confinement structure 40 around the extension of the material confinement channel 41 and is isolated between the material confinement structure 40 and the furnace body 10.

After the material is heated in the heating section 42, the heat of the material is transferred to the material limiting structure 40, and under the isolation of the heat insulation structure 50, the heat of the material limiting structure 40 is rarely transferred to the furnace body 10, so that the heat dissipation of the material limiting structure 40 is reduced, the heat energy is saved, and the use safety of the furnace body 10 can be improved.

In some embodiments, insulation 50 is filled with insulation particles.

The insulating particles are in the form of granules, the particle size of which is usually small. The smaller the particle size of the heat-insulating particles is, the better the heat-insulating property is. The heat-insulating particles are particles formed by heat-insulating materials, and the heat-insulating materials can be quartz cotton, diatomite, slag cotton, expanded perlite, vermiculite and the like. The heat-insulating particles may be spherical, columnar, prismatic, square, polyhedral, or the like.

Specifically, the insulation structure 50 may be obtained by directly filling insulation particles between the material limiting structure 40 and the furnace body 10.

At this time, the heat insulation structure 50 is formed of a structure filled with heat insulation particles, and molding is convenient.

Optionally, the particle size of the insulating particles is in the range of 10mm to 30mm. Further, the particle diameter of the insulating particles may be selected to be 15mm to 25mm, for example, 20mm. The larger the particle diameter of the heat-insulating particles, the larger the gaps between the heat-insulating particles, and the worse the heat-insulating effect. The smaller the particle diameter of the heat-insulating particles, the higher the preparation cost of the heat-insulating particles. At this time, the heat-insulating effect and the preparation cost of the heat-insulating particles are good.

Optionally, the thermal conductivity of the thermal insulation particles is (0.2-0.5) W/mk, and the thermal insulation effect of the thermal insulation structure 50 can reduce heat dissipation and energy consumption.

In some embodiments, referring to fig. 1, 2 and 3, the end surface of the heat insulation structure 50 facing the feeding end 11 of the furnace body 10 is a drainage end surface 51, the drainage end surface 51 encloses to form a drainage channel 52 communicated with the inlet end of the material limiting structure 40, and the drainage channel 52 is disposed in a flaring manner facing away from the material limiting structure 40.

Specifically, the transition space K mentioned in the above-described embodiment is formed jointly between the drainage end face 51 and the inlet end of the feed end 11 and the inlet end of the limiting structure 40, i.e. the drainage channel 52 forms the transition space K.

The flow-guiding end face 51 flares away from the material-limiting structure 40, i.e. the flow-guiding end face 51 is inclined relative to the extension direction of the material-limiting channel 41 and guides the material into the material-limiting channel 41.

Under the drainage of the drainage end face 51, materials can smoothly enter the material limiting channel 41, and therefore the production efficiency of the furnace body 10 can be improved.

In some embodiments, referring to fig. 1, 2 and 3, the furnace structure 100 further includes a temperature resistant structure 60, and the temperature resistant structure 60 is disposed between the furnace 10 and the heat insulation structure 50 in a spaced-apart manner.

Generally, the temperature resistant structure 60 is disposed around the insulation structure 50 around the extending direction of the material limiting passage 41. The temperature resistant structure 60 is formed of a temperature resistant material including a temperature resistant clay brick, quartz sand, high alumina brick, a carbon resistant brick, a temperature resistant concrete, a silicon carbide product, various temperature resistant fibers, etc., and the specific type is not limited, and a conventional part in the art may be selected. Optionally, the temperature resistant structure 60 is made of a temperature resistant material with a temperature resistant temperature of 1450-2600 ℃, and is generally made of a temperature resistant material with good insulation property.

At this time, the heat-resistant structure 60 is provided between the furnace body 10 and the heat-insulating structure 50, so that the risk of burning the furnace body 10 can be reduced.

In some embodiments, the resistivity of the material confinement structure 40 is higher than the resistivity of the anode body 30.

When the anode body 30 is a graphite anode, the material limiting structure 40 may be a carbon structure, a ceramic structure, or the like, and the higher the resistivity of the material limiting structure 40 is, the better. In the embodiment of the utility model, the resistivity measurement method can refer to the national standard GB/T351-2009 method for measuring resistivity of metal materials.

When the resistivity of the material limiting structure 40 is higher than that of the negative electrode body 30, the current is conductive between the positive electrode body 20 and the negative electrode body 30 and a heating electric field is formed, so that the heating uniformity of the material is ensured, and the quality uniformity of the product is improved.

In some embodiments, the confining structure 40 is a carbon. The resistivity of carbon is more than or equal to 32 mu omega m, the volume density is more than or equal to 1.64, and the thermal expansion coefficient (600 ℃) is less than or equal to 4.5X10 ^-6 Ash content at/DEG C<1%, the resistivity is good, and the influence on the heating electric field is small. And the strength is higher, so that the impact of material flow can be borne, and the material can be well drained. Moreover, the ash content is small, and the influence on the purity of the product is small.

In an embodiment of the present utility model, the furnace structure 100 includes a furnace 10, a positive electrode body 20, a negative electrode body 30 and a material limiting structure 40, the furnace 10 has a heating zone Q, the material limiting structure 40 is disposed in the furnace 10, and a material limiting channel 41 for material flow is formed in a surrounding manner, and the material limiting channel 41 has a heating section 42 located in the heating zone Q. The positive electrode body 20 is located at the inlet side of the limiting passage 41 and partially located in the limiting passage 41, and the negative electrode body 30 is located at the outlet side of the limiting passage 41 and has a passing hole 31 communicating with the limiting passage 41. Along the extension direction of the material limiting channel 41, the projection of the outer contour of the negative electrode body 30 covers and exceeds the projection of the positive electrode body 20 and the projection of the heating section 42.

In addition, the embodiment of the present utility model further provides a graphitizing furnace, which includes the furnace body structure 100 in any of the above embodiments, which has all the above beneficial effects, and is not described herein.

In addition, the embodiment of the utility model also provides a battery production system, which comprises the graphitization furnace, and has all the beneficial effects and is not repeated herein. Specifically, the graphitization furnace can be applied to the production of graphite cathode materials of batteries.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the claims. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (18)

1. A furnace structure, characterized in that the furnace structure comprises:

a furnace body having a heating zone;

the material limiting structure is arranged in the furnace body and is surrounded to form a material limiting channel for material flow, and the material limiting channel is provided with a heating section positioned in the heating zone.

2. The furnace structure according to claim 1, further comprising a positive electrode body and a negative electrode body, the positive electrode body and the negative electrode body being disposed in the furnace body at intervals;

the heating zone is located between the positive electrode body and the negative electrode body, and the positive electrode body and the negative electrode body are configured to be capable of directly heating a material flowing through the heating zone under an energization condition.

3. The furnace structure according to claim 2, wherein the positive electrode body and the negative electrode body are disposed opposite to each other in the extending direction of the material limiting passage, and the positive electrode body is located on a side where an inlet end of the material limiting passage is located, and the negative electrode body is located on a side where an outlet end of the material limiting passage is located.

4. The furnace structure according to claim 2, wherein an outer contour projection of an end of the negative electrode body facing the positive electrode body exceeds a projection of the heating section along an extending direction of the material limiting passage.

5. The furnace structure according to claim 4, wherein the positive electrode body extends into the material limiting passage, and the negative electrode body is located outside the material limiting passage.

6. The furnace structure according to claim 4, wherein the anode body has a feed-through hole communicating with the feed-limiting passage.

7. The furnace structure according to claim 2, wherein the material limiting structure has a higher resistivity than the negative electrode body.

8. The furnace structure according to any one of claims 1 to 7, wherein the cross-sectional projections of the confining channels are identical everywhere along the extension direction of the confining channels.

9. The furnace structure according to any one of claims 1 to 7, wherein the furnace has a feed end which is spaced apart from an inlet end of the material limiting passage in an extending direction of the material limiting passage and forms a transition space.

10. The furnace structure according to claim 9, wherein a volatilization channel is provided on the furnace body to communicate the transition space with the outside of the furnace body.

11. The furnace structure according to claim 9, wherein a shortest distance between an inlet end of the material limiting passage and a feed end of the furnace body is 40mm to 50mm.

12. The furnace structure according to any one of claims 1-7, further comprising a thermal insulation structure disposed in isolation between the furnace and the material confinement structure.

13. The furnace structure according to claim 12, wherein the insulating structure is filled with insulating particles.

14. The furnace structure according to claim 13, wherein the heat-insulating particles have a particle size in the range of 10mm to 30mm.

15. The furnace structure according to claim 12, wherein an end surface of the heat insulation structure facing the furnace body feeding end is a drainage end surface, a drainage channel communicated with the inlet end of the material limiting structure is formed by surrounding the drainage end surface, and the drainage channel is arranged in a flaring mode facing away from the material limiting structure.

16. The furnace structure of claim 12, further comprising a temperature resistant structure disposed in isolation between the furnace and the insulating structure.

17. A graphitization furnace comprising the furnace body structure of any one of claims 1-16.

18. A battery production system comprising the graphitization furnace of claim 17.