Carbon-carbon-graphite composite furnace tube

Abstract

The utility model discloses a carbon-carbon graphite composite furnace tube, which belongs to the related technical field of furnace tubes of rotary kilns and comprises a carbon-carbon outer tube of a cylindrical structure. The graphite inner tube is positioned in the carbon-carbon outer tube and is movably connected with the carbon-carbon outer tube; and the material lifting plates are fixed at the bottom of the graphite inner pipe, are movably connected with the graphite inner pipe and are uniformly arranged on the inner side of the circumference of the graphite inner pipe. The furnace tube is used for solving the technical problems that a furnace tube in the prior art is not resistant to high temperature, poor in fracture resistance and difficult to carry and replace.

Description

Technical Field

[0001] The utility model belongs to the technical field related to rotary kiln furnace tubes, in particular to a carbon-carbon graphite composite furnace tube. Background Art

[0002] A rotary kiln is a large rotary furnace that is widely used in building materials, metallurgy, chemical industry, environmental protection and other industries for high-temperature treatment of solid materials. Its main function is to heat treat materials at high temperatures to achieve chemical reactions or physical changes. The structure of a rotary kiln usually includes a cylindrical shell installed at an angle, with refractory materials inside, which can work at high temperatures. The working principle of a rotary kiln is that the material is added from one end of the kiln (usually the high end), and as the kiln body rotates and tilts, the material slowly moves along the axial direction of the kiln body to the other end. In this process, the material is affected by heat, undergoing a series of complex physical and chemical changes, and finally producing the desired product. The furnace tube of a rotary kiln is an important part of the kiln. It is a long cylindrical tube body, usually made of high-temperature resistant materials such as stainless steel, quartz, corundum, etc. The diameter and material of the furnace tube will vary depending on the design and operating temperature of the kiln.

[0003] At present, high-temperature rotary tubes are generally below 1200°C and use high-temperature stainless steel. Under ultra-high temperatures, ceramics or graphite are used. The temperature of ceramics cannot exceed 1800°C. Graphite is used as a furnace tube, and its bending resistance is poor, so it cannot be large-scaled. In order to ensure strength, the tube wall needs to be made very thick, which makes the furnace tube very heavy and difficult to carry and replace. Therefore, it is necessary to propose a carbon-carbon graphite composite furnace tube to solve the above technical problems. Utility Model Content

[0004] In view of the above problems, the utility model provides a carbon-carbon-graphite composite furnace tube, which is used to solve the technical problems in the prior art that the furnace tube is not resistant to high temperature, has poor bending resistance, and is difficult to transport and replace.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A carbon-carbon-graphite composite furnace tube, comprising

[0007] A carbon-carbon outer tube, which is a cylindrical structure;

[0008] A graphite inner tube, which is located inside the carbon-carbon outer tube and movably connected to the carbon-carbon outer tube;

[0009] The poplar plate is fixed at the bottom of the graphite inner tube and is movably connected to the graphite inner tube. The poplar plate is evenly arranged on the inner side of the circumference of the graphite inner tube.

[0010] Compared with the prior art, the utility model has the beneficial effects of providing a carbon-carbon graphite composite furnace tube, which has a stable structure, can maintain the integrity and functionality of the material in a high temperature environment, and is easy to carry and replace.

[0011] As a further improvement of the above solution, the graphite inner tube and the carbon-carbon outer tube are connected by bolts, pins or blocks.

[0012] The technical effect of the above improvement is that the connection between the graphite inner tube and the carbon-carbon outer tube is more flexible, easy to install and maintain, and at the same time ensures the reliability of the structure.

[0013] As a further improvement of the above solution, the poplar plate is in a long strip shape along the direction of the carbon-carbon outer tube and is in an arc shape near the center of the carbon-carbon outer tube.

[0014] The technical effect of the above improvement is: it helps to improve the structural strength and durability of the furnace tube, and the lifting plate is to make the material evenly distributed in the drying rotary kiln.

[0015] As a further improvement of the above solution, the poplar plate includes a poplar plate body and a boss, and a groove suitable for the boss is arranged on the graphite inner tube.

[0016] The technical effect of the above improvement is that this design increases the contact area between components and improves the stability of the connection.

[0017] As a further improvement of the above solution, the poplar plate and the graphite inner tube are connected by bolts and pins.

[0018] The technical effect of the above improvement is that this connection method is simple and reliable, easy to assemble and disassemble, and convenient for maintenance and replacement of furnace tubes.

[0019] As a further improvement of the above solution, the number of poplar plates is set to 4.

[0020] The technical effect of the above improvement is: ensuring uniform support and heat distribution of the internal material of the furnace tube, and improving the use efficiency and heat treatment quality of the furnace tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the utility model (continuous rotary kiln).

[0022] Figure 2 It is a schematic diagram of the utility model (intermittent rotary kiln).

[0023] Figure 3 for Figure 2 and Figure 1 Schematic diagram of the cross section taken from the bolt position.

[0024] Figure 4This is a schematic diagram of the carbon outer tube and the graphite inner tube connected by a clamp block in the utility model.

[0025] In the figure: 1, carbon-carbon outer tube; 2, graphite inner tube; 3, Poplar plate; 301, Poplar plate body; 302, boss; 4, bolt; 5, clamping block. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution, the utility model is described in detail below in conjunction with embodiments. The description in this section is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model.

[0027] like Figure 1-3 As shown, the specific scheme of this embodiment is: a carbon-carbon graphite composite furnace tube, comprising

[0028] A carbon-carbon outer tube 1, which is a cylindrical structure;

[0029] The graphite inner tube 2 is located inside the carbon-carbon outer tube 1 and is movably connected to the carbon-carbon outer tube 1;

[0030] The poplar plate 3 is fixed at the bottom of the graphite inner tube 2 and is movably connected to the graphite inner tube 2 . The poplar plate 3 is evenly arranged on the inner side of the circumference of the graphite inner tube 2 .

[0031] Specifically, the carbon-carbon furnace tube is used as an exoskeleton to ensure the strength of the furnace tube, and the embedded graphite reduces the cost and solves the problem of carbon-carbon furnace tube hanging dust during the production process. The use of carbon-carbon furnace tube and graphite composite connection solves the problem that the furnace tube cannot be large-scale and high-temperature. Various connection methods ensure the mechanical properties of the furnace tube at high temperatures.

[0032] like Figure 1-Figure 3 As shown, as a preferred embodiment of the above embodiment, the graphite inner tube 2 is connected to the carbon-carbon outer tube 1 by bolts 4, pins or blocks 5, so that the graphite inner tube 2 can be easily disassembled when necessary, which is convenient for maintenance and replacement.

[0033] like Figure 1-Figure 3 As shown, as a preferred embodiment of the above embodiment, the poplar plate 3 is long and narrow along the carbon-carbon outer tube 1, and is arc-shaped near the center of the carbon-carbon outer tube 1. The poplar plate 3 includes a poplar plate body 301 and a boss 302. The graphite inner tube 2 is provided with a groove suitable for the boss 302 to ensure that the poplar plate 3 is firmly embedded in the graphite inner tube 2. There are 4 poplar plates 3, and each poplar plate 3 is evenly distributed on the inner side of the circumference of the graphite inner tube 2, so that the material is evenly distributed in the drying rotary kiln.

[0034] As a preferred embodiment of the above embodiment, the poplar plate 3 is connected to the graphite inner tube 2 by bolts and pins. This connection method not only ensures the stability of the structure, but also allows the poplar plate 3 to be easily replaced without damaging the graphite inner tube 2.

[0035] The ends of the carbon-carbon outer tube 1 are connected by baffles, and various holes or grooves are arranged inside the baffles so that the product can be rolled out. The baffles are connected by thread, slot and other connection methods. The baffles block external radiation and save energy.

[0036] It should be noted that, in this article, the terms include, contain or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. Specific examples are used in this article to illustrate the principle and implementation of the technical solution of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. The above are only preferred implementations of the utility model. It should be pointed out that due to the limitations of textual expression and the objective existence of infinite specific structures, for ordinary technicians in this technical field, without departing from the principle of the utility model, several improvements, modifications or changes can be made, and the above technical features can also be combined in an appropriate manner; these improvements, modifications, changes or combinations, or the direct application of the concept and technical solution of the utility model to other occasions without improvement, should be regarded as the protection scope of the utility model.

Claims

1. A carbon-carbon graphite composite furnace tube, characterized in that: include A carbon-carbon outer tube (1) having a cylindrical structure; A graphite inner tube (2), which is located inside the carbon-carbon outer tube (1) and is movably connected to the carbon-carbon outer tube (1); A poplar plate (3) is fixed at the bottom of the graphite inner tube (2) and is movably connected to the graphite inner tube (2). The poplar plate (3) is evenly arranged on the inner side of the circumference of the graphite inner tube (2).

2. A carbon-carbon-graphite composite furnace tube according to claim 1, characterized in that: The graphite inner tube (2) and the carbon-carbon outer tube (1) are connected by bolts (4), pins or clamping blocks (5).

3. The carbon-carbon-graphite composite furnace tube according to claim 1, characterized in that: The poplar plate (3) is in a long strip shape along the direction of the carbon-carbon outer tube (1), and is in an arc shape near the center of the carbon-carbon outer tube (1).

4. The carbon-carbon-graphite composite furnace tube according to claim 3, characterized in that: The poplar plate (3) comprises a poplar plate body (301) and a boss (302), and a groove suitable for the boss (302) is arranged on the graphite inner tube (2).

5. The carbon-carbon-graphite composite furnace tube according to claim 3, characterized in that: The poplar plate (3) is connected to the graphite inner tube (2) via bolts and pins.

6. A carbon-carbon-graphite composite furnace tube according to any one of claims 4 or 5, characterized in that: The number of the poplar plates (3) is 4.

Images