CN219776301U - Vertical continuous graphitizing furnace - Google Patents

Abstract

The utility model provides a vertical continuous graphitizing furnace, which comprises: the furnace body is provided with a furnace chamber, a feeding hole and a discharging hole which are communicated with the furnace chamber, the feeding hole and the discharging hole are arranged at intervals along the up-down direction of the furnace chamber, the furnace chamber comprises a preheating zone and a heating zone, the preheating zone is positioned between the feeding hole and the heating zone, and heating equipment is arranged in the furnace chamber; the circulating pipe is filled with a flowable heat-conducting medium, the circulating pipe is provided with a heat absorption section and a heat release section, the heat absorption section is arranged in the furnace chamber and is positioned at the discharge hole, and the heat release section is arranged at the preheating zone, so that the heat-conducting medium can absorb heat in the heat absorption section and release heat in the heat release section. According to the technical scheme provided by the utility model, the problems that continuous production cannot be realized and energy loss is large in a graphitization furnace in the related technology can be solved.

Description

Vertical continuous graphitizing furnace

Technical Field

The utility model relates to the technical field of graphitizing furnaces, in particular to a vertical continuous graphitizing furnace.

Background

Graphitization of the powdery material is an important process for producing graphite materials, a graphitization furnace is an important device for graphitizing the powdery material, and the cost, quality and economic benefit of a graphite product are directly related to the graphitization furnace.

In the related art, graphitizing furnaces are in the form of an inner-string graphitizing furnace, an acheson graphitizing furnace, a box furnace, and the like. The internal serial graphitizing furnace is characterized in that a plurality of electrode crucibles (filled with cathode materials) are longitudinally connected in series, the electrode crucibles are both carriers and heating bodies, and high temperature is generated by current passing through the electrode crucibles to directly heat the internal cathode materials. The Acheson graphitizing furnace is characterized in that a graphite crucible is filled in an original furnace and is used as a carrier of a negative electrode material, a heating resistor material is filled in a furnace core, and an outer layer is insulated by a heat insulation material and a furnace wall. After the electric conduction, the high temperature of 2600-3200 ℃ is generated mainly by heating the resistance material, the negative electrode material in the crucible is indirectly heated, and finally, the high-temperature graphitization of the negative electrode material is achieved. The furnace core of the box-type furnace adopts a grid-type material box structure formed by a plurality of anode plates, negative electrode raw materials are filled in the material box, the anode plates are fixed through connecting columns with grooves on four sides, and the upper surface and the lower surface of each material box are sealed by anode plates made of the same material. The upright posts and the anode plates which form the material box structure together form a heating body, and current is sent into the furnace core heating body through the furnace end electrode, and the generated high temperature directly heats the cathode material in the box, so that the purpose of graphitization is achieved.

However, by adopting the above method, the processes of furnace opening, filling, heat treatment and cooling and discharging are all required, continuous production cannot be realized, and industrialization efficiency is affected. Meanwhile, the graphite product cooling process brings great energy loss.

Disclosure of Invention

The utility model provides a vertical continuous graphitizing furnace, which aims to solve the problems that the graphitizing furnace in the related art cannot realize continuous production and has large energy loss.

The utility model provides a vertical continuous graphitizing furnace, which comprises: the furnace body is provided with a furnace chamber, a feeding hole and a discharging hole which are communicated with the furnace chamber, the feeding hole and the discharging hole are arranged at intervals along the up-down direction of the furnace chamber, the furnace chamber comprises a preheating zone and a heating zone, the preheating zone is positioned between the feeding hole and the heating zone, and heating equipment is arranged in the furnace chamber; the circulating pipe is filled with a flowable heat-conducting medium, the circulating pipe is provided with a heat absorption section and a heat release section, the heat absorption section is arranged in the furnace chamber and is positioned at the discharge hole, and the heat release section is arranged at the preheating zone, so that the heat-conducting medium can absorb heat in the heat absorption section and release heat in the heat release section.

Further, the circulating pipe is also provided with a connecting section, the heat absorbing section and the heat releasing section are connected through the connecting section, and the connecting section is arranged on the furnace body or outside the furnace body.

Further, the furnace body is also provided with a material collecting opening positioned below the heating area, the furnace chamber is also provided with a cooling area positioned above the material outlet, the material collecting opening is positioned above the cooling area, and the heat absorbing section is arranged in the cooling area.

Further, a material collecting barrel is arranged in the furnace chamber, the upper end of the material collecting barrel is arranged on the furnace body, a material collecting opening is formed at the lower end of the material collecting barrel, the material collecting barrel comprises a reducing section, and the cross section size of the reducing section is gradually reduced from top to bottom.

Further, the heat conducting medium is heat conducting oil.

Further, the vertical continuous graphitizing furnace further comprises an exhaust gas utilization assembly, the exhaust gas utilization assembly comprises a burner and an exhaust gas pipe, the upper portion of the furnace body is provided with an exhaust gas port, two ends of the exhaust gas pipe are respectively communicated with the exhaust gas port and the burner, the furnace chamber further comprises a reheating zone positioned between the preheating zone and the heating zone, and the burner is arranged on the inner side wall of the furnace body and corresponds to the reheating zone.

Further, the exhaust gas utilization assembly further includes a vacuum pump disposed on the exhaust pipe and a first filter, the first filter being located upstream of the vacuum pump.

Further, the exhaust gas utilization assembly further comprises an exhaust pipe communicated with the burner, and a second filter is arranged on the exhaust pipe.

Further, the heating equipment comprises an induction heater and a graphite induction heating rod corresponding to the induction heater, and the graphite induction heating rod is arranged in the furnace body; and/or the heating equipment further comprises a resistance heater which is arranged on the inner side wall of the furnace body and is positioned above the graphite induction heating rod.

Further, an inert gas inlet is arranged on the side wall of the furnace body, and the inert gas inlet is correspondingly communicated with the heating zone.

By applying the technical scheme of the utility model, the vertical continuous graphitizing furnace comprises a furnace body and a circulating pipe, and when the graphitizing furnace is applied, materials enter the furnace body from a feed inlet, and the materials are heated by heating equipment arranged in the furnace chamber, so that graphitization can be realized. And is output out of the furnace body through the discharge hole. Meanwhile, as the heat absorption section of the circulating pipe is arranged at the discharge port of the furnace chamber, heat of graphite at the discharge port can be absorbed by utilizing the heat conduction medium in the heat absorption section, and the heat of the heat conduction medium is released through the heat release section arranged at the preheating zone so as to preheat materials in the preheating zone, so that the materials are heated. By adopting the graphitizing furnace, continuous production is realized, and meanwhile, the waste heat of a graphite product can be utilized to preheat materials, so that the recycling of the waste heat is realized.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 shows a cross-sectional view of a vertical continuous graphitizing furnace provided according to an embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. a furnace body; 11. a cavity; 12. a preheating zone; 13. a heating zone; 14. a cooling area; 15. a material collecting barrel; 16. a reheat zone; 17. a graphite induction heating rod; 18. an induction heater; 19. a resistance heater;

20. a circulation pipe; 21. a heat absorbing section; 22. an exothermic section;

30. an exhaust gas utilization assembly; 31. a burner; 32. an exhaust pipe; 33. a vacuum pump; 34. a first filter; 35. an exhaust pipe; 36. and a second filter.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the embodiment of the utility model provides a vertical continuous graphitizing furnace, which comprises a furnace body 10 and a circulating pipe 20, wherein the furnace body 10 is provided with a furnace chamber 11, a feed inlet and a discharge outlet which are communicated with the furnace chamber 11, the feed inlet and the discharge outlet are arranged at intervals along the up-down direction of the furnace chamber 11, the furnace chamber 11 comprises a preheating zone 12 and a heating zone 13, the preheating zone 12 is positioned between the feed inlet and the heating zone 13, and heating equipment is arranged in the furnace chamber 11; the circulation pipe 20 is filled with a flowable heat-conducting medium, and the circulation pipe 20 has a heat-absorbing section 21 and a heat-releasing section 22, the heat-absorbing section 21 being disposed in the cavity 11 at the discharge port, and the heat-releasing section 22 being disposed at the preheating section 12 so that the heat-conducting medium can absorb heat in the heat-absorbing section 21 and release heat in the heat-releasing section 22.

By applying the technical scheme of the utility model, the vertical continuous graphitizing furnace comprises a furnace body 10 and a circulating pipe 20, and when the graphitizing furnace is applied, materials enter the furnace body 10 from a feed inlet, and the materials are heated by heating equipment arranged in the furnace chamber 11, so that graphitization can be realized. And is output out of the furnace body 10 through a discharge hole. Meanwhile, as the heat absorption section 21 of the circulating pipe 20 is arranged at the discharge port of the furnace chamber 11, heat of graphite at the discharge port can be absorbed by utilizing the heat conduction medium in the heat absorption section 21, and the heat of the heat conduction medium is released through the heat release section 22 arranged at the preheating zone 12 so as to preheat materials in the preheating zone 12, so that the materials are heated. By adopting the graphitizing furnace, continuous production is realized, and meanwhile, the waste heat of a graphite product can be utilized to preheat materials, so that the recycling of the waste heat is realized.

In this embodiment, the furnace body 10 adopts at least 5 layers of structures, and is composed of a furnace inner wall, a heat insulation layer, a heat insulation reflecting layer, a cooling water jacket and a furnace shell from inside to outside in sequence, wherein the function of the furnace inner wall is to prevent dust from gathering, isolate the powder atmosphere in the furnace from the furnace body structure, and is preferably made of graphite or carbon fiber composite material; the heat insulation layer plays a role in isolating most of heat in the furnace so that the heat is not conducted to the outside of the furnace, and the preferable materials are heat insulation materials such as calcium silicate base, magnesium base and the like; the heat insulation reflecting layer can further isolate heat in the furnace and reflect the dissipated heat to the heat insulation layer; the cooling water jacket can reduce the temperature of the furnace body, prevent the furnace body from being overheated to oxidize or melt, and the cooling liquid is preferably water; the furnace shell plays a role of fixing and supporting, and is cut by refractory bricks and other materials.

The heating device is arranged in the heating zone 13, the graphite induction heating rod 17 is heated in the heating zone 13 by utilizing an induction heating mode, the heat of the graphite induction heating rod 17 is conducted to the powder material to heat the powder material, after the temperature of the powder material reaches the critical temperature 2200-2600 ℃, the powder material can be directly heated by induction, and the powder material is continuously heated to a proper temperature to finish graphitization.

In this embodiment, the graphite product at the discharge port can reach a temperature of 100 ℃ or higher. The material of the circulation tube 20 is preferably metal.

As shown in fig. 1, the circulation pipe 20 further has a connection section through which the heat absorbing section 21 and the heat releasing section 22 are connected, and the connection section is provided on the furnace body 10 or outside the furnace body 10. The connecting section is arranged on the furnace body 10 or outside the furnace body 10, so that the damage to the connecting section caused by high temperature in the furnace chamber 11 can be avoided, and the service life of the connecting section is prolonged.

As shown in fig. 1, the furnace body 10 further has a material collecting opening below the heating area 13, the furnace chamber 11 further includes a cooling area 14 above the material outlet, the material collecting opening is above the cooling area 14, and the heat absorbing section 21 is disposed in the cooling area 14. The heated graphite product can be collected by the material collecting port, and the speed of the graphite product entering the cooling area 14 is controlled.

As shown in fig. 1, a material collecting barrel 15 is arranged in the furnace chamber 11, the upper end of the material collecting barrel 15 is arranged in the furnace body 10, the lower end of the material collecting barrel 15 forms a material collecting opening, the material collecting barrel 15 comprises a reducing section, and the cross section size of the reducing section is gradually reduced from top to bottom. The material collecting barrel 15 adopting the structure has the advantages of simple structure and convenient arrangement.

Wherein, the material collecting barrel 15 can also comprise a jointing section arranged above the reducing section, and is connected with the inner wall of the furnace body 10 by the jointing section.

As shown in fig. 1, the heat conducting medium is heat conducting oil. Because the heat conduction oil has a higher boiling point, the vaporization of the heat conduction oil in the circulating pipe 20 can be avoided, and the safety performance in the use process is improved.

As shown in fig. 1, the vertical continuous graphitizing furnace further comprises an exhaust gas utilization assembly 30, the exhaust gas utilization assembly 30 comprises a burner 31 and an exhaust gas pipe 32, an exhaust gas port is arranged at the upper part of the furnace body 10, two ends of the exhaust gas pipe 32 are respectively communicated with the exhaust gas port and the burner 31, the furnace chamber 11 further comprises a reheating zone 16 positioned between the preheating zone 12 and the heating zone 13, and the burner 31 is arranged on the inner side wall of the furnace body 10 and corresponds to the reheating zone 16. The exhaust gas in the furnace body 10 can be recovered by the exhaust gas utilization assembly 30, and the materials in the reheating zone 16 are heated again by the burner 31, so that the energy saving advantage is achieved.

In this embodiment, the waste gas is generated during graphitization of the material, and is flammable.

In other embodiments, the exhaust gas may also be used to directly exchange heat with the material to heat the material for preheating.

As shown in fig. 1, the exhaust gas utilization assembly 30 further includes a vacuum pump 33 disposed on the exhaust pipe 32 and a first filter 34, the first filter 34 being located upstream of the vacuum pump 33. The vacuum pump 33 can form a slight negative pressure state in the furnace body 10, which is advantageous for exhaust gas extraction.

In this embodiment, the powder material in the exhaust gas can be filtered by the first filter 34, so that the exhaust gas is cleaner.

As shown in fig. 1, the exhaust gas utilization assembly 30 further includes an exhaust pipe 35 in communication with the burner 31, and a second filter 36 is disposed on the exhaust pipe 35, and the second filter 36 can adsorb components of the burned harmful gas such as sulfur dioxide. Exhaust gas after combustion can be discharged by the exhaust pipe 35.

As shown in fig. 1, the heating device comprises an induction heater 18 and a graphite induction heating rod 17 corresponding to the induction heater 18, wherein the graphite induction heating rod 17 is arranged in the furnace body 10, and the induction heater 18 can be used for heating the graphite induction heating rod 17 to a temperature higher than 2500 ℃ so as to further raise the temperature of the material to a temperature higher than 2200 ℃ to generate graphitization.

The induction heater 18 may be configured as an intermediate frequency induction heater or a high frequency induction heater.

In this embodiment, the heating apparatus further includes a resistance heater 19, and the resistance heater 19 is disposed on the inner sidewall of the furnace body 10 and above the graphite induction heating rod 17. The reheated mass can be heated by means of the resistive heater 19 and to 1800 ℃.

In the present embodiment, the material of the resistance heater 19 is preferably a metal heater, a silicon molybdenum rod, or a carbon fiber composite material.

As shown in fig. 1, an inert gas inlet is provided on the side wall of the furnace body 10, and the inert gas inlet is correspondingly communicated with the heating zone 13. The inert gas is introduced by the inert gas inlet, and the combustible gas is pumped out from the waste gas port, so that the problem of 'spraying' of the graphitization furnace can be effectively solved.

In the present embodiment, a temperature control system is provided in the heating zone 13. Specifically, a thermocouple temperature controller is arranged in the area corresponding to the resistance heater 19, and an infrared temperature controller is arranged in the area corresponding to the graphite induction heating rod 17.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present utility model and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present utility model; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface at … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A vertical continuous graphitizing furnace, comprising:

the furnace body (10) is provided with a furnace chamber (11), and a feed inlet and a discharge outlet which are communicated with the furnace chamber (11), wherein the feed inlet and the discharge outlet are arranged at intervals along the up-down direction of the furnace chamber (11), the furnace chamber (11) comprises a preheating zone (12) and a heating zone (13), the preheating zone (12) is positioned between the feed inlet and the heating zone (13), and heating equipment is arranged in the furnace chamber (11);

the circulating pipe (20) is filled with a flowable heat conducting medium, the circulating pipe (20) is provided with a heat absorbing section (21) and a heat releasing section (22), the heat absorbing section (21) is arranged in the furnace chamber (11) and positioned at the discharge hole, and the heat releasing section (22) is arranged at the preheating zone (12) so that the heat conducting medium can absorb heat in the heat absorbing section (21) and release heat in the heat releasing section (22).

2. The vertical continuous graphitizing furnace according to claim 1, characterized in that the circulation pipe (20) further has a connection section through which the heat absorbing section (21) and the heat releasing section (22) are connected, the connection section being provided on the furnace body (10) or outside the furnace body (10).

3. The vertical continuous graphitizing furnace according to claim 1, wherein the furnace body (10) further has a material collecting port located below the heating zone (13), the furnace chamber (11) further comprises a cooling zone (14) located above the material outlet, the material collecting port is located above the cooling zone (14), and the heat absorbing section (21) is disposed in the cooling zone (14).

4. A vertical continuous graphitizing furnace according to claim 3, wherein a material collecting cylinder (15) is arranged in the furnace chamber (11), the upper end of the material collecting cylinder (15) is arranged in the furnace body (10), the lower end of the material collecting cylinder (15) forms the material collecting port, the material collecting cylinder (15) comprises a reducing section, and the cross section size of the reducing section is gradually reduced from top to bottom.

5. The vertical continuous graphitizing furnace of claim 1, wherein the heat transfer medium is heat transfer oil.

6. The vertical continuous graphitizing furnace according to claim 1, further comprising an exhaust gas utilization assembly (30), the exhaust gas utilization assembly (30) comprising a burner (31) and an exhaust gas pipe (32), the upper portion of the furnace body (10) being provided with an exhaust gas port, both ends of the exhaust gas pipe (32) being respectively in communication with the exhaust gas port and the burner (31), the furnace chamber (11) further comprising a reheating zone (16) located between the preheating zone (12) and the heating zone (13), the burner (31) being provided in an inner side wall of the furnace body (10) and being provided in correspondence to the reheating zone (16).

7. The vertical continuous graphitization furnace of claim 6, wherein the exhaust gas utilization assembly (30) further comprises a vacuum pump (33) and a first filter (34) disposed on the exhaust gas pipe (32), the first filter (34) being located upstream of the vacuum pump (33).

8. The vertical continuous graphitizing furnace according to claim 6, wherein the exhaust gas utilization assembly (30) further comprises an exhaust pipe (35) in communication with the burner (31), the exhaust pipe (35) having a second filter (36) disposed thereon.

9. The vertical continuous graphitization furnace according to claim 1, wherein,

the heating equipment comprises an induction heater (18) and a graphite induction heating rod (17) corresponding to the induction heater (18), wherein the graphite induction heating rod (17) is arranged in the furnace body (10); and/or the number of the groups of groups,

the heating equipment further comprises a resistance heater (19), wherein the resistance heater (19) is arranged on the inner side wall of the furnace body (10) and is positioned above the graphite induction heating rod (17).

10. The vertical continuous graphitizing furnace according to claim 1, characterized in that an inert gas inlet is provided on the side wall of the furnace body (10), said inert gas inlet being in corresponding communication with the heating zone (13).