CN218936993U

CN218936993U - Tube furnace

Info

Publication number: CN218936993U
Application number: CN202222365003.8U
Authority: CN
Inventors: 李可丁; 朱凯; 金东旭
Original assignee: Xiamen Leon Technology Co ltd
Current assignee: Xiamen Leon Technology Co ltd
Priority date: 2022-09-06
Filing date: 2022-09-06
Publication date: 2023-04-28
Anticipated expiration: 2032-09-06

Abstract

The utility model relates to a tube furnace, comprising: and (5) a vacuum tank. The heating pipe assembly is arranged in the vacuum tank and comprises an inner pipe, an outer pipe and a heater, wherein the inner pipe and the outer pipe are both rotationally connected with the vacuum tank, the inner pipe is arranged in a pipe cavity of the outer pipe, and the inner pipe is not in contact with the outer pipe; the heater cover is established in the periphery of outer tube, set gradually high temperature district, transition district and low temperature district on the heater, the low temperature district is close to the entry end setting of inner tube, the high temperature district is close to the exit end setting of inner tube. And the driving piece is arranged outside the vacuum tank and is used for driving the inner pipe and the outer pipe to rotate. The utility model can recover the waste heat of the materials to a certain extent, saves more energy and can reduce the heating cost to a certain extent.

Description

Tube furnace

Technical Field

The utility model relates to the technical field of heating furnaces, in particular to a tube furnace.

Background

The tube furnace is mainly applied to industries such as metallurgy, glass, heat treatment, lithium battery anode and cathode materials, new energy, grinding tools and the like, and professional equipment for measuring materials under certain air temperature conditions. Tube furnaces have the advantage of continuous production and are currently being used more and more.

The existing tubular furnace basically does not recycle the heat of the materials, however, the waste heat of the materials is generally higher, and even if the materials are cooled (natural cooling or forced cooling) after discharging, the waste heat of the materials is directly wasted. Although the tube furnace is relatively energy-saving, if the waste heat of the materials can be recycled, the method has great promotion significance for energy conservation, emission reduction and cost reduction.

Disclosure of Invention

The utility model aims to provide a tubular furnace which can recover waste heat of materials to a certain extent, is more energy-saving and can reduce heating cost to a certain extent.

To achieve the above object, the present utility model discloses a tube furnace comprising:

and (5) a vacuum tank.

The heating pipe assembly is arranged in the vacuum tank and comprises an inner pipe, an outer pipe and a heater, wherein the inner pipe and the outer pipe are both rotationally connected with the vacuum tank, the inner pipe is arranged in a pipe cavity of the outer pipe, and the inner pipe is not in contact with the outer pipe; the heater cover is established in the periphery of outer tube, set gradually high temperature district, transition district and low temperature district on the heater, the low temperature district is close to the entry end setting of inner tube, the high temperature district is close to the exit end setting of inner tube.

And the driving piece is arranged outside the vacuum tank and is used for driving the inner pipe and the outer pipe to rotate.

Preferably, the inner tube comprises a first inner tube orifice and a second inner tube orifice, the outer tube comprises a first outer tube orifice and a second outer tube orifice, and the second outer tube orifice is plugged; the second inner pipe port of the inner pipe extends into the pipe cavity of the outer pipe; the first inner pipe orifice is an inlet of the material, and the first outer pipe orifice is an outlet of the material.

Preferably, the first inner tube port is disposed outside the lumen of the outer tube.

Preferably, the pipe diameter of the inner pipe increases from the first inner pipe orifice to the second inner pipe orifice, and the pipe diameter of the outer pipe increases from the second outer pipe orifice to the first outer pipe orifice.

Preferably, the inner pipe and the outer pipe are all of pipe structures with equal pipe diameters, and guide grooves or guide plates are arranged on the inner pipe walls of the inner pipe and the outer pipe.

Preferably, the heating pipe assemblies comprise at least two groups, and the heating pipe assemblies are arranged at intervals in the vertical direction; a material receiving pipe is arranged between every two adjacent heating pipe assemblies, an inlet of the material receiving pipe is communicated with a first outer pipe opening corresponding to the heating pipe assembly positioned above, and an outlet of the material receiving pipe is communicated with a first inner pipe opening corresponding to the heating pipe assembly positioned below.

Preferably, the inner tube and the outer tube are coaxially arranged.

Preferably, the heater comprises a plurality of electromagnetic heating jackets with different heating temperatures.

Preferably, the outer tube and the inner tube respectively correspond to a driving piece and are in transmission connection.

The utility model has the following beneficial effects:

the heating pipe assembly comprises an inner pipe and an outer pipe, wherein the inner pipe is arranged in a pipe cavity of the outer pipe, and the heater is sleeved on the outer pipe. The material is fed from one end of the inner tube, then discharged from the other end of the inner tube to one end of the outer tube, and then discharged from the other end of the outer tube. The material moves from the low temperature region to the high temperature region in the inner tube through the transition region, the material absorbs heat and heats up, the rotating speed of the driving piece is controlled, and the residence time of the material in a certain temperature region can be controlled so as to meet the heating process requirement of the material. The material is removed to the low temperature district by the high temperature district through the transition district in the outer tube, and the material heat dissipation cooling is before the material is discharged from the outer tube, and the waste heat of material is retrieved partly and is used for keeping warm, moreover because normal atmospheric temperature material lasts the material loading, the one end temperature change of inner tube feeding is comparatively great, and this feeding temperature change can be balanced to a certain extent to the material waste heat of retrieving, does benefit to the control by temperature for the heating effect of material is better. The utility model can recover the waste heat of the materials to a certain extent, saves more energy and can reduce the heating cost to a certain extent.

Drawings

Fig. 1 is a schematic diagram of a first embodiment.

Fig. 2 is a schematic diagram of a second embodiment.

Fig. 3 is a schematic diagram of a third embodiment.

Note that: the dash-dot line with arrow in fig. 1 is the movement track of the material.

Main component symbol description:

a vacuum tank 10;

a heating tube assembly 20, an inner tube 21, a first inner tube orifice 211, a second inner tube orifice 212, an outer tube 22, a first outer tube orifice 221, a second outer tube orifice 222, and a heater 23;

a driving member 30;

and a receiving tube 40.

Detailed Description

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent.

Embodiment one:

as shown in fig. 1, the present embodiment discloses a tube furnace, which includes: a vacuum tank 10, a heating tube assembly 20, and a drive 30. The driving member 30 is a motor. The heating tube assembly 20 is placed inside the vacuum tank 10 so that the material can be heated under vacuum. The driving member 30 is disposed outside the vacuum tank 10, so as to facilitate control, and meanwhile, the driving member 30 can dissipate heat, thereby avoiding the high temperature in the tank from affecting the operation.

The heating tube assembly 20 includes an inner tube 21, an outer tube 22, and a heater 23, both the inner tube 21 and the outer tube 22 are rotatably connected to the vacuum tank 10, and the inner tube 21 and the outer tube 22 can be rotatably connected to the vacuum tank 10 by fitting a collar, a bracket, or the like. The inner tube 21 is disposed within the lumen of the outer tube 22, the inner tube 21 is disposed coaxially with the outer tube 22, and the inner tube 21 is not in contact with the outer tube 22. Specifically, the inner tube 21 includes a first inner orifice 211 and a second inner orifice 212, and the outer tube 22 includes a first outer orifice 221 and a second outer orifice 222, the second outer orifice 222 being plugged. The second inner nozzle 212 of the inner tube 21 extends into the lumen of the outer tube 22, and the first inner nozzle 211 is disposed outside the lumen of the outer tube 22. The first inner nozzle 211 is the inlet for the material and the first outer nozzle 221 is the outlet for the material. In particular, the pipe diameter of the inner pipe 21 increases from the first inner pipe orifice 211 to the second inner pipe orifice 212, and the pipe diameter of the outer pipe 22 increases from the second outer pipe orifice 222 to the first outer pipe orifice 221, and after this arrangement, the inner pipe walls of the inner pipe 21 and the outer pipe 22 may be smooth surfaces, and the material may move obliquely downward as the inner pipe 21 and the outer pipe 22 rotate.

The driving member 30 is in transmission connection with the inner tube 21 and the outer tube 22 through matching of a transmission shaft, a gear ring and the like, the inner tube 21 and the outer tube 22 can share one driving member 30, and the driving member 30 can also respectively correspond to one set of driving member 30 so as to realize independent control.

The heater 23 is composed of a plurality of electromagnetic heating jackets, the heating temperatures of the electromagnetic heating jackets are different from each other, the electromagnetic heating jackets are sequentially arranged and sleeved on the periphery of the outer tube 22 according to the heating temperatures and are coaxially arranged, and the intervals between the electromagnetic heating jackets and the outer tube 22 are equal so as to facilitate better heating and control the temperature. In the same heater 23, the heat radiation area corresponding to the electromagnetic heating sleeve with the highest heating temperature is a high temperature area, the heat radiation area corresponding to the electromagnetic heating sleeve with the lowest heating temperature is a low temperature area, the low temperature area is close to the first inner pipe orifice 211, the high temperature area is close to the second inner pipe orifice 212, and a transition area is arranged between the high temperature area and the low temperature area. Taking the example that the heater 23 is composed of 5 electromagnetic heating jackets and the temperature range of the heater 23 is 200-300 ℃, the heating temperature of the five electromagnetic heating jackets can be 200 ℃,225 ℃, 250 ℃, 275 ℃,300 ℃, wherein the temperature region corresponding to 200 ℃ is a low temperature region, the temperature region corresponding to 300 ℃ is a high temperature region, and the temperature regions corresponding to 225 ℃, 250 ℃ and 275 ℃ are transition regions.

The material is fed from the first inner pipe orifice 211, and gradually moves towards the second inner pipe orifice 212 along with the rotation of the inner pipe 21, and the material moves from the low temperature region to the high temperature region through the transition region, so that the material absorbs heat and rises in temperature. After the material falls from the second inner pipe orifice 212 to the second outer pipe orifice 222, the material gradually moves towards the first outer pipe orifice 221 along with the rotation of the outer pipe 22 until discharging, the material moves from a high temperature region to a low temperature region through a transition region in the process, the material dissipates heat and cools down, and the rest of heat radiates to the inner pipe 21 to be recycled to a certain extent. By providing a transition zone, severe temperature changes can be avoided. By controlling the rotational speed of the driving member 30 (motor), the residence time of the material in each temperature zone can be controlled to meet the production process requirements.

Embodiment two:

as shown in fig. 2, the difference between the present embodiment and the first embodiment is that the inner tube 21 and the outer tube 22 are all of equal-diameter tube structures, and guide grooves or guide plates are provided on the inner tube 21 walls of the inner tube 21 and the outer tube 22, and the movement of the material is realized by the cooperation of the guide grooves or guide plates along with the rotation of the inner tube 21 and the outer tube 22.

Embodiment III:

as shown in fig. 3, the difference between the present embodiment and the first embodiment is that the number of the heating tube assemblies 20 is three, and the three heating tube assemblies 20 are arranged at intervals in the vertical direction. A material receiving pipe 40 is arranged between every two adjacent heating pipe assemblies 20, an inlet of the material receiving pipe 40 is communicated with a first outer pipe orifice 221 corresponding to the heating pipe assembly 20 positioned above, and an outlet of the material receiving pipe 40 is communicated with a first inner pipe orifice 211 corresponding to the heating pipe assembly 20 positioned below. The heating temperatures of the corresponding heaters 23 of the adjacent heating pipe assemblies 20 are different. For example, the uppermost heating tube assembly 20 has a low temperature of 200 c and a high temperature of 300 c, the middle heating tube assembly 20 has a low temperature of 500 c and a high temperature of 600 c, and the lowermost heating tube assembly 20 has a low temperature of 200 c and a high temperature of 300 c. By serially connecting a plurality of heating tube assemblies 20, the expected temperature control effect is further ensured.

Embodiment four:

the difference between the present embodiment and the third embodiment is that the inner tube 21 and the outer tube 22 are all of equal-diameter tube structures, and guide grooves or guide plates are provided on the inner tube 21 walls of the inner tube 21 and the outer tube 22, and the movement of the material is realized by the cooperation of the guide grooves or guide plates along with the rotation of the inner tube 21 and the outer tube 22.

The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.

Claims

1. A tube furnace, comprising:

a vacuum tank;

the heating pipe assembly is arranged in the vacuum tank and comprises an inner pipe, an outer pipe and a heater, wherein the inner pipe and the outer pipe are both rotationally connected with the vacuum tank, the inner pipe is arranged in a pipe cavity of the outer pipe, and the inner pipe is not in contact with the outer pipe; the heater is sleeved on the periphery of the outer tube, a high-temperature region, a transition region and a low-temperature region are sequentially arranged on the heater, the low-temperature region is arranged close to the inlet end of the inner tube, and the high-temperature region is arranged close to the outlet end of the inner tube;

2. The tube furnace of claim 1, wherein: the inner pipe comprises a first inner pipe orifice and a second inner pipe orifice, the outer pipe comprises a first outer pipe orifice and a second outer pipe orifice, and the second outer pipe orifice is plugged; the second inner pipe port of the inner pipe extends into the pipe cavity of the outer pipe; the first inner pipe orifice is an inlet of the material, and the first outer pipe orifice is an outlet of the material.

3. The tube furnace of claim 2, wherein: the first inner tube port is disposed outside the lumen of the outer tube.

4. The tube furnace of claim 2, wherein: the pipe diameter of the inner pipe increases gradually from the first inner pipe orifice to the second inner pipe orifice, and the pipe diameter of the outer pipe increases gradually from the second outer pipe orifice to the first outer pipe orifice.

5. The tube furnace of claim 2, wherein: the inner pipe and the outer pipe are of pipe structures with equal pipe diameters, and guide grooves or guide plates are arranged on the inner pipe walls of the inner pipe and the outer pipe.

6. The tube furnace of claim 2, wherein: the heating pipe assemblies comprise at least two groups, and the heating pipe assemblies are arranged at intervals in the vertical direction; a material receiving pipe is arranged between every two adjacent heating pipe assemblies, an inlet of the material receiving pipe is communicated with a first outer pipe opening corresponding to the heating pipe assembly positioned above, and an outlet of the material receiving pipe is communicated with a first inner pipe opening corresponding to the heating pipe assembly positioned below.

7. The tube furnace of claim 1, wherein: the inner tube and the outer tube are coaxially arranged.

8. The tube furnace of claim 1, wherein: the heater comprises a plurality of electromagnetic heating sleeves with different heating temperatures.

9. The tube furnace of claim 8, wherein: the distance between the electromagnetic heating sleeve and the outer tube is equal.

10. The tube furnace of claim 1, wherein: the outer tube and the inner tube are respectively corresponding to a driving piece and are in transmission connection.