Expanded graphite heating furnace

Abstract

The utility model relates to graphite expansion equipment, in particular to an expanded graphite heating furnace which comprises a shell, the shell comprises a protective shell and a heat preservation layer, an expansion assembly and a feeding and discharging device are arranged on the inner side of the heat preservation layer, and a heating device is arranged at the top of the heat preservation layer, penetrates through the side wall of the expansion assembly and extends into the expansion assembly. The interior of the puffing assembly can be heated. According to the utility model, the material dispersing device is arranged above the feeding pipe, the feeding pipe is used for feeding materials from bottom to top, the material dispersing cone is used for quickly dispersing the materials entering the heating bin, and the material dispersing motor is used for driving the material dispersing propeller to rotate to disperse the dispersed materials, so that the materials can be fully expanded, and the expansion rate is improved; and the expanded materials are discharged from the discharging pipe, and the discharging pipe is wound on the feeding pipe, so that air flow and the materials in the feeding pipe can be primarily heated by utilizing waste heat of the materials, heat loss caused after the materials and the air flow enter the heating bin is reduced, and energy is saved.

Description

Technical Field

[0001] The utility model relates to graphite expansion equipment, in particular to an expanded graphite heating furnace. Background Art

[0002] Graphite is an allotrope of carbon. It is a gray-black, opaque solid with stable chemical properties, corrosion resistance, and is not easy to react with acids, alkalis and other agents. Under appropriate conditions, various chemical substances such as acids, alkali metals, and salts are inserted between graphite layers and combined with carbon atoms to form a new chemical phase - graphite interlayer compound, also called expandable graphite or graphite oxide. Expandable graphite can expand rapidly when heated at high temperatures, with the expansion multiple reaching tens to hundreds or even thousands of times. The apparent volume of the expanded graphite reaches 250-300mL / g or more. The expanded graphite is worm-like, with a size ranging from a few millimeters to several millimeters. It has a large number of unique network-like microporous structures inside, which are called expanded graphite or graphite worms. In addition to the excellent properties of natural graphite itself, such as resistance to cold and heat, corrosion resistance, and self-lubrication, expanded graphite also has the characteristics of softness, compression resilience, adsorption, ecological environment coordination, biocompatibility, and radiation resistance that natural graphite does not have.

[0003] Existing graphite expansion devices generally feed from the top or side and use high temperature to heat expandable graphite. However, after graphite is heated and expanded, its volume increases instantly, and some graphite may be wrapped inside and not expanded, which needs to be screened later, and production efficiency needs to be improved. At the same time, the energy consumption of the expansion furnace is high, and the residual heat of the expanded graphite is not fully utilized, resulting in energy waste. Utility Model Content

[0004] The main purpose of the utility model is to provide an expanded graphite heating furnace to solve the problems in the related art that the expansion rate needs to be improved and the energy consumption of the expansion furnace is high.

[0005] In order to achieve the above object, according to one aspect of the utility model, an expanded graphite heating furnace is provided, comprising:

[0006] An outer shell, the outer shell comprising a protective shell and a heat-insulating layer, an expansion component and a feeding and discharging device are arranged inside the heat-insulating layer, a heating device is arranged on the top of the heat-insulating layer, the heating device penetrates the side wall of the expansion component and extends into the expansion component, and can heat the inside of the expansion component;

[0007] The expansion assembly is used for graphite expansion, and the expansion assembly includes a heating bin, a discharge bin is provided below the heating bin, a feed pipe is provided through the middle of the discharge bin, and expandable graphite enters the heating bin from the feed pipe, and a bulking device is provided above the feed pipe, and the bulking device is used to evenly disperse the expandable graphite into the heating bin;

[0008] The feeding and discharging device includes a feeding device and a discharging pipe. The feeding device is connected to the feeding pipe and is used to transport expandable graphite to the feeding pipe. The discharging pipe is connected to the discharging bin and is spirally wound around the feeding device. The discharging pipe is used to discharge and use the residual heat after the graphite expands to heat the feeding device.

[0009] Furthermore, the bulking device includes a bulking propeller and a bulking motor, wherein the bulking motor is installed on the top of the protective shell, and the output shaft of the bulking motor passes through the protective shell and the insulation layer and is connected to the bulking propeller.

[0010] Furthermore, a bulk material cone is provided at the center of the bottom surface of the bulk material propeller, and the bulk material cone and the bulk material propeller are coaxial.

[0011] Furthermore, the bottom end of the bulk material cone is higher than the top end of the feed pipe, and the bulk material cone and the feed pipe are coaxial.

[0012] Furthermore, a spiral discharge plate is provided between the outer side surface of the feed pipe and the inner side surface of the heating bin.

[0013] Furthermore, the feeding device includes a screw feeder, the tail end of the screw feeder is connected to a feeding pipe, and the top end of the feeding pipe passes through the protective shell and the insulation layer and is connected to the feeding pipe.

[0014] Furthermore, a blast pipe is connected to the bottom end of the feeding pipe, and the blast pipe is used to input high-pressure air into the feeding pipe.

[0015] Furthermore, the discharge pipe is wound around the feed pipe, the tail end of the discharge pipe passes through the protective shell and the insulation layer, and the discharge pipe and the feed pipe are wrapped with a second insulation layer on the outside.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model arranges a bulking device above a feed pipe, uses a feed pipe to feed materials upward from below, uses a bulking cone to quickly disperse materials entering a heating bin, and uses a bulking motor to drive a bulking propeller to rotate to break up the dispersed materials, so that the materials can be fully expanded and the expansion rate is improved; the expanded materials are discharged from a discharge pipe, and because the discharge pipe is wound around the feed pipe, the residual heat of the materials can be used to preliminarily heat the airflow and materials in the feed pipe, thereby reducing heat loss caused by the materials and airflow entering the heating bin and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a schematic cross-sectional view of the shell structure of the utility model;

[0020] Figure 3 This is a schematic cross-sectional view of the puffing assembly structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the discharging device of the utility model.

[0022] Illustration Description:

[0023] 1. Shell; 11. Protective shell; 12. Insulation layer; 13. Heating tube; 14. Heating head;

[0024] 2. Expansion assembly; 21. Heating chamber; 22. Spiral discharge plate; 23. Discharge chamber; 24. Feed pipe; 25. Bulk material propeller; 26. Bulk material motor; 27. Bulk material cone;

[0025] 3. Feeding and discharging device; 31. Screw feeder; 32. Blast pipe; 33. Feeding pipe; 34. Discharging pipe; 35. Second insulation layer. DETAILED DESCRIPTION

[0026] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0027] See also Figures 1 to 4 This embodiment provides an expanded graphite heating furnace, comprising:

[0028] The outer shell 1 includes a protective shell 11 and an insulating layer 12. A puffing component 2 and a feeding and discharging device 3 are arranged inside the insulating layer 12. A heating device is arranged on the top of the insulating layer 12. The heating device penetrates the side wall of the puffing component 2 and extends into the puffing component 2, so as to heat the inside of the puffing component 2.

[0029] The heat-insulating layer 12 is used to isolate the heat exchange between the expansion component 2 and the protective shell 11 , thereby reducing the heat loss of the expansion component 2 .

[0030] The heating device comprises a heating tube 13 , a heating head 14 is threadedly connected to the side of the heating tube 13 , and the heating head 14 penetrates the heating chamber 21 and extends into the heating chamber 21 .

[0031] The heating tube 13 is used to provide energy to the heating head 14, and the heating head 14 is used to heat the interior of the heating chamber 21. The heating method can be electric heating.

[0032] The expansion component 2 is used for graphite expansion. The expansion component 2 includes a heating bin 21. A discharge bin 23 is provided below the heating bin 21. A feed pipe 24 is provided through the middle of the discharge bin 23. Expandable graphite enters the heating bin 21 from the feed pipe 24. A bulking device is provided above the feed pipe 24. The bulking device is used to evenly disperse the expandable graphite into the heating bin 21.

[0033] The heating bin 21 and the discharge bin 23 are connected by welding, and the heating bin 21, the feed pipe 24 and the discharge bin 23 need to be made of high temperature resistant materials. The feed pipe 24 passes through the discharge bin 23 from top to bottom, and the feed pipe 24 and the discharge bin 23 are welded.

[0034] The bulking device includes a bulking propeller 25 and a bulking motor 26. The bulking motor 26 is installed on the top of the protective shell 11. The output shaft of the bulking motor 26 passes through the protective shell 11 and the insulation layer 12 and is connected to the bulking propeller 25 through a coupling.

[0035] The bulk material motor 26 is fixedly mounted with bolts at the top center of the protective shell 11. After the bulk material motor 26 is started, it can drive the bulk material propeller 25 to rotate through the output shaft.

[0036] A bulk material cone 27 is threadedly connected to the center of the bottom surface of the bulk material screw 25 , and the bulk material cone 27 and the bulk material screw 25 are coaxial.

[0037] The bulk material cone 27 is an inverted cone. The bulk material cone 27 can rotate with the bulk material screw 25. Since the bulk material cone 27 and the bulk material screw 25 are coaxial, when the bulk material cone 27 rotates, the cone head part will not swing.

[0038] The bottom end of the bulk material cone 27 is higher than the top end of the feed pipe 24 , and the bulk material cone 27 and the feed pipe 24 are coaxial.

[0039] Since the bulking cone 27 and the feed pipe 24 are coaxial, when the material enters the heating bin 21 from the feed pipe 24 , it hits the bulking cone 27 and can be dispersed around along the cone surface of the bulking cone 27 .

[0040] A spiral discharge plate 22 is welded between the outer side surface of the feed pipe 24 and the inner side surface of the heating chamber 21 .

[0041] The spiral discharge plate 22 can prolong the time for the material to fall into the discharge bin 23, increase the heating time of the material, and reduce the proportion of unexpanded material.

[0042] The feeding and discharging device 3 includes a feeding device and a discharging pipe 34. The feeding device is connected to the feeding pipe 24 and is used to transport expandable graphite to the feeding pipe 24. The discharging pipe 34 is connected to the discharging bin 23 and is spirally wound around the feeding device. The discharging pipe 34 is used to discharge and use the residual heat after the graphite expands to heat the feeding device.

[0043] There are two discharge pipes 34, which are arranged in a double helix shape. The top of the discharge pipe 34 is welded to the bottom of the discharge bin 23.

[0044] The feeding device includes a screw feeder 31 , a feeding pipe 33 is connected to the rear end of the screw feeder 31 , and the top end of the feeding pipe 33 penetrates the protective shell 11 and the insulation layer 12 and is welded to the feed pipe 24 .

[0045] The screw feeder 31 adopts a known screw feeding device, which is used to quantitatively convey expandable graphite into the feeding pipe 33 to ensure the stability of feeding.

[0046] A blast pipe 32 is fixedly installed at the bottom end of the feeding pipe 33 by bolts. The blast pipe 32 is used to input high-pressure air into the feeding pipe 33 .

[0047] The blast pipe 32 is connected to the air compressor through a pipeline. The air compressor can be a known air compression device, which is used to deliver high-pressure gas to the blast pipe 32. Nitrogen is preferably used as the gas. The high-pressure gas enters the feeding pipe 33 from the blast pipe 32 and moves upward in the feeding pipe 33. At this time, the screw feeder 31 delivers materials into the feeding pipe 33. The high-pressure gas will carry the materials upward and enter the feeding pipe 24.

[0048] The discharge pipe 34 is wound around the feed pipe 33 , and the tail end of the discharge pipe 34 passes through the protective shell 11 and the thermal insulation layer 12 . The discharge pipe 34 and the feed pipe 33 are wrapped with a second thermal insulation layer 35 .

[0049] The second heat-insulating layer 35 is used to reduce the heat loss of the discharge pipe 34 .

[0050] When the device is used, the heating tube 13 is started and the heating head 14 is used to heat the heating chamber 21 .

[0051] When the temperature in the heating chamber 21 reaches the production requirement of expanded graphite, the screw feeder 31 is started to transport materials into the feeding pipe 33 , and high-pressure nitrogen is transported into the feeding pipe 33 through the blast pipe 32 .

[0052] The high-pressure nitrogen can push the material to move upward and spray out from the end of the feed pipe 24. At this time, the bulk material motor 26 is started, and the bulk material motor 26 can drive the bulk material propeller 25 to rotate.

[0053] After the material ejected from the end of the feed pipe 24 hits the bulk cone 27, it is dispersed to the surroundings and is affected by the high temperature during the dispersion process. The outer layer of the material becomes expanded graphite and is then dispersed by the bulk propeller 25. The unheated material inside expands due to the heat.

[0054] The material falls to the spiral discharge plate 22, and the spiral moves downward under the dual influence of airflow and gravity, and is continuously heated, and the unexpanded material inside expands in the process.

[0055] The material falls into the discharge bin 23 and is then discharged from the discharge pipe 34. The high-temperature expanded graphite in the discharge pipe 34 spirals downward and exchanges heat with the discharge pipe 34. The discharge pipe 34 exchanges heat with the feed pipe 33 to heat the high-pressure nitrogen and material in the feed pipe 33, thereby reducing the heat loss caused by the high-pressure nitrogen and material entering the heating bin 21 and reducing energy consumption.

[0056] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. Expanded graphite heating furnace, characterized in that, include: An outer shell (1), the outer shell (1) comprising a protective shell (11) and a heat-insulating layer (12), a puffing assembly (2) and a feeding and discharging device (3) being provided inside the heat-insulating layer (12), a heating device being provided on the top of the heat-insulating layer (12), the heating device penetrating a side wall of the puffing assembly (2) and extending into the puffing assembly (2), and being capable of heating the interior of the puffing assembly (2); The expansion assembly (2) is used for graphite expansion, and the expansion assembly (2) comprises a heating chamber (21), a discharge chamber (23) is provided below the heating chamber (21), a feed pipe (24) is provided through the middle of the discharge chamber (23), expandable graphite enters the heating chamber (21) from the feed pipe (24), and a bulking device is provided above the feed pipe (24), the bulking device is used to evenly disperse the expandable graphite into the heating chamber (21); The feeding and discharging device (3) comprises a feeding device and a discharging pipe (34); the feeding device is connected to the feeding pipe (24) and is used to convey expandable graphite to the feeding pipe (24); the discharging pipe (34) is connected to the discharging bin (23) and is spirally wound around the feeding device; the discharging pipe (34) is used to discharge the material and to heat the feeding device using the residual heat after the graphite expands.

2. The expanded graphite heating furnace according to claim 1, characterized in that: The bulking device comprises a bulking propeller (25) and a bulking motor (26); the bulking motor (26) is mounted on the top of the protective shell (11); an output shaft of the bulking motor (26) passes through the protective shell (11) and the thermal insulation layer (12) and is connected to the bulking propeller (25).

3. The expanded graphite heating furnace according to claim 2, characterized in that: A bulk material cone (27) is provided at the center of the bottom surface of the bulk material screw propeller (25), and the bulk material cone (27) and the bulk material screw propeller (25) are coaxial.

4. The expanded graphite heating furnace according to claim 3, characterized in that: The bottom end of the bulk material cone (27) is higher than the top end of the feed pipe (24), and the bulk material cone (27) and the feed pipe (24) are coaxial.

5. The expanded graphite heating furnace according to claim 4, characterized in that: A spiral discharge plate (22) is provided between the outer side surface of the feed pipe (24) and the inner side surface of the heating chamber (21).

6. The expanded graphite heating furnace according to claim 1, characterized in that: The feeding device comprises a screw feeder (31), the rear end of the screw feeder (31) being connected to a feeding pipe (33), the top end of the feeding pipe (33) passing through the protective shell (11) and the thermal insulation layer (12) and then connected to the feeding pipe (24).

7. The expanded graphite heating furnace according to claim 6, characterized in that: The bottom end of the feeding pipe (33) is connected to a blast pipe (32), and the blast pipe (32) is used to input high-pressure air into the feeding pipe (33).

8. The expanded graphite heating furnace according to claim 6, characterized in that: The discharge pipe (34) is wound around the feed pipe (33); the tail end of the discharge pipe (34) passes through the protective shell (11) and the thermal insulation layer (12); and the discharge pipe (34) and the feed pipe (33) are externally wrapped with a second thermal insulation layer (35).

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