Rotary automatic feeding and discharging tubular experimental furnace

Abstract

The utility model discloses a rotary automatic feeding and discharging tubular experimental furnace. The tubular experimental furnace comprises a supporting seat, a furnace tube and a hearth, two ends of the furnace tube are respectively supported on the surfaces of the supporting seats through tube bodies. The hearth is arranged outside a tube body of the furnace tube in a wrapping mode, and a heating module is arranged in the hearth. And spiral bulges with opposite spiral directions are respectively arranged on the inner wall of the front section and the inner wall of the rear section of the furnace tube. According to the rotary automatic feeding and discharging tubular experimental furnace provided by the utility model, two threads in opposite directions are arranged on the inner wall of the furnace tube, so that the effects of forward rotation automatic feeding and reverse rotation automatic discharging are realized, the difficulty of manual feeding and taking is reduced, the temperature fluctuation in the furnace caused by feeding and taking is avoided, and the experimental efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a tubular experimental furnace, in particular to a rotary automatic feeding and discharging tubular experimental furnace, belonging to the technical field of heat treatment equipment. Background Art

[0002] Heat treatment is a crucial step in material processing in industrial production, and heat treatment furnaces are the core equipment of the heat treatment process. Tubular furnaces are a key sintering device used in the research of new materials. In scientific research and production, they are one of the primary devices used for heat treatment, calcination, and reduction of samples. They provide specific temperatures, atmospheres, and vacuum environments during the sintering process, ensuring the purity of the sintering environment. They are a commonly used heat treatment furnace.

[0003] In the production of desulfurization and denitrification activated carbon, rotary kilns are often used for carbonization, and some manufacturers also use rotary kilns for activation. Since the raw coal type is often changed during production, if large-scale production equipment is used for production tests, excessive waste of raw materials and energy will occur, and the cost will be high. Therefore, a small tubular furnace similar to the production rotary kiln can be configured to conduct verification exploration and experimental law exploration, and then feedback to production, which can save a lot of manpower and material resources. The control methods of traditional tubular furnaces are mostly based on experience or fixed process parameters, which are difficult to adapt to the needs of different materials and processes, resulting in unstable heat treatment effects. At the same time, existing experimental tubular furnaces are usually unable to accurately simulate the production rotary kiln's rotation while automatically loading and unloading materials, and cannot perform a high degree of automated control and operation.

[0004] For example, Chinese patent CN 114988408 A, "Activation Experimental Apparatus and Carbonization Activation Method," provides an activation experimental apparatus and carbonization activation method. The activation experimental apparatus includes a reaction tube and a water vapor supply assembly connected to the reaction tube for supplying water vapor into the reaction tube, thereby activating the activated coke particles under water vapor. Carbonization experiments can also be conducted using inert gas. This apparatus can perform carbonization activation experiments on granular activated carbon, but its inability to rotate may result in uneven heating of the material. Furthermore, with only one temperature zone, multi-stage independent temperature control is not possible, limiting the range of experimental process parameter settings. Chinese patent CN 214192582 U, "A Carbon Activation Integrated Test Furnace," discloses a carbon activation integrated test furnace, comprising a control box and a rotary box positioned above the control box. The rotary box houses a rotary furnace body, which is equipped with a coupling, a feed port, an exhaust pipe, a thermometer, a pressure gauge, an air inlet, a nitrogen inlet, and a steam inlet. The steam inlet is connected to a steam inlet pipe, which is connected to a steam generator. The inner walls of the rotary box are insulated with insulation foam and bricks, with the bricks covering the outer walls of the rotary furnace body. The control box is equipped with a display, an air flow meter, a nitrogen flow meter, an operating keyboard, and temperature control buttons. This test furnace solves the problem of separating carbonization and activation in activated carbon production, reducing energy consumption and gas emissions. However, it only has one temperature zone, making it impossible to achieve multi-stage independent temperature control, limiting the range of experimental process parameter settings. In addition, the operation of adding and removing experimental materials is rather cumbersome, and can only be done manually, which is time-consuming and labor-intensive. Utility Model Content

[0005] In response to the problems of existing tubular furnaces that cannot accurately simulate production rotary furnaces, have a low degree of automation, cannot independently control multiple temperature stages, cannot automatically add and remove materials, are time-consuming and labor-intensive, and have low experimental efficiency, the utility model proposes a rotary automatic feeding and discharging tubular experimental furnace. The inner wall of the furnace tube is provided with two oppositely directed threads to realize the automation of feeding and discharging, eliminating the need for repeated manual feeding and discharging and temperature raising and lowering, thereby improving experimental efficiency.

[0006] A rotary, automatic loading and unloading tubular experimental furnace comprises a support base, a furnace tube, and a furnace chamber. The ends of the furnace tube are supported on the surface of the support base by a tube body. The furnace chamber is encased outside the furnace tube body and contains a heating module. Spiral projections with opposite spiral directions are provided on the inner wall of the front section and the inner wall of the rear section of the furnace tube.

[0007] Preferably, the tubular experimental furnace further includes a lifting support frame. The lifting support frame is mounted on the bottom of one end of the support base. The lifting support frame tilts the upper surface of the support base into an inclined surface with one end higher than the other. The furnace tube accordingly has a structure with one end higher than the other, with the higher end of the furnace tube serving as the feed end and the lower end serving as the discharge end.

[0008] Preferably, the tubular experimental furnace further includes a rotation unit. The rotation unit includes a transmission assembly and a rotation drive assembly. The rotation drive assembly is connected to the transmission assembly, which is in turn connected to the furnace tube. Preferably, the rotation unit further includes a speed control assembly, which is connected to the rotation drive assembly. Preferably, the transmission assembly is a gear transmission or a chain transmission.

[0009] Preferably, the length of the tube body with spiral protrusions on the front inner wall of the furnace tube does not exceed 1 / 2 of the total length of the furnace tube, and preferably the length of the tube body with spiral protrusions on the front inner wall of the furnace tube is 1 / 10 to 1 / 3 of the total length of the furnace tube.

[0010] Preferably, the length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube does not exceed 1 / 2 of the total length of the furnace tube, and preferably the length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube is 1 / 10 to 1 / 3 of the total length of the furnace tube.

[0011] Preferably, the height of the spiral protrusion along the radial direction of the furnace tube is 1 to 100 mm, preferably 3 to 80 mm, and more preferably 5 to 50 mm.

[0012] Preferably, the spiral protrusions provided on the inner wall of the front section and / or the inner wall of the rear section of the furnace tube are designed as a discontinuous multi-segment interval. Preferably, the spacing between any two adjacent spiral protrusions is no greater than 10-60%, preferably 15-40%, of the length of the tube body occupied by any one of the spiral protrusions.

[0013] Preferably, the inner wall of the front section of the furnace tube includes 2 to 20 interval-type spiral protrusions.

[0014] Preferably, the inner wall of the rear section of the furnace tube includes 2 to 20 interval-type spiral protrusions.

[0015] Preferably, the lifting support frame includes a telescopic rod and a lifting drive assembly connected to the telescopic rod. One end of the telescopic rod is arranged at the bottom of the support seat, and the other end is arranged on the ground or the laboratory table.

[0016] Preferably, the heating module includes 2 to 5 independent heating components. Preferably, the furnace tube is divided into 2 to 5 temperature intervals along its axial direction, and each temperature interval corresponds to a heating component.

[0017] Preferably, the heating component is a resistance wire or a silicon carbon rod.

[0018] Preferably, each temperature interval is provided with a temperature detection device.

[0019] Preferably, the furnace is an openable structure. Preferably, the furnace comprises an independent upper furnace and a lower furnace, the upper furnace and the lower furnace are connected by a rotating shaft, and the upper furnace can rotate around the rotating shaft.

[0020] Preferably, the tube support comprises a front support frame and a rear support frame, wherein the front support frame is connected to the feed end of the furnace tube, and the rear support frame is connected to the discharge end of the furnace tube.

[0021] Preferably, the furnace tube is detachably connected to the tube support. Preferably, the connection method between the furnace tube and the tube support includes but is not limited to hinge connection, threaded connection, snap connection, and flange connection.

[0022] Preferably, the tubular experimental furnace further comprises a pushing unit. The pushing unit is arranged at the connection between the feed bin and the furnace tube. Preferably, the pushing unit includes but is not limited to an air pump push rod pusher or a spiral pusher.

[0023] Preferably, the tubular experimental furnace further comprises a feed bin, which is arranged at the feed end of the furnace tube and is in communication with the furnace tube.

[0024] Preferably, the tubular experimental furnace further comprises a material receiving tube, which is arranged at the discharge end of the furnace tube and is in communication with the furnace tube.

[0025] Preferably, the tubular experimental furnace further includes a control unit. The control unit is disposed on a support base, the ground, or a laboratory table. The control unit is independently connected to the heating module, the lifting support frame, the rotating unit, and the pushing unit. Preferably, the control box is a PLC control box.

[0026] In the present invention, two spiral protrusions running in opposite directions are provided on the inner wall of the furnace tube. Material enters from one end of the furnace tube, which controls its rotation. The spiral protrusions on the inner wall of the feed end of the furnace tube drive the material toward the center of the furnace tube. After the experiment is completed, the furnace tube rotates in the opposite direction, and the reverse thread on the inner wall of the discharge end of the furnace tube drives the material toward the other end and discharges the material from the furnace tube. The experiment is completed after the material is completely discharged, achieving the effect of forward feeding and reverse discharge, reducing the difficulty of manual material addition and removal, and avoiding temperature fluctuations in the furnace caused by material addition and removal. In addition, during the experiment, the presence of the reverse spiral protrusions on the inner wall of the discharge end of the furnace tube, while the rotation is maintained, effectively prevents the phenomenon in which the current portion of material enters the center of the furnace tube while the latter portion is still at the feed end of the furnace tube, while the former portion of material is discharged from the discharge end due to the rotation of the furnace tube.

[0027] In this utility model, a lifting support frame is provided. When material needs to be discharged, the support seat on the feed end of the furnace tube is lifted upward to prevent material from accumulating in the area without spiral protrusions in the middle of the furnace tube, thus achieving fully automatic discharge. At the same time, the lifting unit, combined with the spiral protrusions on the inner wall of the furnace tube, can control the forward speed of the material in the furnace tube by changing the lifting angle and the rotation speed of the furnace tube, meeting the material's requirements for heating and reaction time. In addition, a rotation unit is provided to drive the furnace tube to rotate automatically, eliminating manual operation and improving experimental efficiency.

[0028] In the present invention, the length of the spiral protrusions on the inner wall of the front section and / or the inner wall of the rear section of the furnace tube is limited to 1 / 10 to 1 / 2 of the length of the furnace tube. Since the spiral protrusions are distributed at both ends of the inner wall of the furnace tube, the disturbance of the materials by the spiral protrusions during the reaction process is avoided, while also taking into account the process of feeding and discharging materials.

[0029] In the utility model, the spiral protrusions on the inner wall of the furnace tube can be continuous or discontinuous. The continuous spiral protrusions enable the material to move forward continuously; the discontinuous spiral protrusions allow the material to stop in the inner tube after passing through the spiral protrusions and then be pushed forward by the subsequent material. The two types of spiral protrusions with different structures both play the role of pushing the material forward.

[0030] In the present invention, the heating unit includes 2 to 5 independent heating components, and the interior of the furnace tube is divided into different temperature intervals. Each temperature interval corresponds to a heating component to achieve independent temperature control. During the experiment, the temperature of each temperature interval can be controlled separately, which is conducive to precise control of temperature parameters.

[0031] In the present invention, the height of the spiral protrusions on the inner wall of the furnace tube is limited, so as to avoid the phenomenon in which the material particle size is too large or too small, resulting in limited or no ability to push the material forward.

[0032] In the present invention, the tubular experimental furnace can be used to conduct activation experiments independently. The temperature, forward rotation speed, and lifting angle of each temperature range of the furnace tube are set. After the temperature reaches the set temperature, it is kept warm for a period of time. Then the material is poured into the feed bin and fed into the furnace tube. Driven by the rotation of the thread, it moves to the middle of the furnace tube. After all the material has entered the furnace tube, the furnace body is controlled to be flat, and steam provided by an external steam generator is connected to carry out insulation activation reaction. After the reaction time is reached, the steam is turned off, the furnace body is lifted, the reverse rotation speed is set, and the material is discharged from the discharge end of the furnace tube. An integrated carbon activation experiment can also be carried out. After all the material has entered the furnace tube, the furnace body is flattened, heated, and protective gas is introduced for carbonization reaction. After the carbonization reaction is completed, the temperature is raised to the activation temperature, the protective gas is cut off, and steam can be introduced for activation reaction. When one batch is completed, if there are other batch experiments, the equipment operating parameters can be adjusted, and the next batch of experiments can be carried out after the temperature stabilizes for a period of time.

[0033] In the present invention, the furnace tube can be made of one of stainless steel, mullite, quartz and alumina.

[0034] In the present invention, the tubular experimental furnace can process materials in the form of columns, blocks, spheres, and amorphous particles.

[0035] In the present invention, the control box is a PLC control box.

[0036] Compared with the prior art, the present invention has the following beneficial effects:

[0037] 1. The utility model provides a rotary automatic feeding and unloading tubular experimental furnace, in which two threads in opposite directions are arranged on the inner wall of the furnace tube, so as to realize the effect of automatic feeding in forward rotation and automatic unloading in reverse rotation, thereby reducing the difficulty of manual feeding and removing materials, avoiding the temperature fluctuation in the furnace caused by feeding and removing materials, and improving the experimental efficiency.

[0038] 2. The utility model provides a rotary automatic feeding and discharging tube-type experimental furnace, which is equipped with functional units such as a lifting support frame, a rotating unit, and a pushing unit to control the movement speed of the material in the furnace tube. In addition, multiple independent heating components are provided to achieve multi-stage precise independent temperature control, thereby improving experimental efficiency and accuracy in various ways. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 The utility model provides a structural schematic diagram of a rotary automatic feeding and discharging tubular experimental furnace.

[0040] Figure markings: 1: support base; 2: furnace tube; 3: furnace; 4: lifting support frame; 5: tube body support; 501: front support frame; 502: rear support frame; 6: heating module; 7: rotating unit; 8: feeding bin; 9: pushing unit; 10: receiving barrel; 11: control unit. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is illustrated below with examples, and the scope of protection requested by the present invention includes but is not limited to the following embodiments.

[0042] A rotary, automatic loading and unloading tubular experimental furnace, characterized in that it comprises a support base 1, a furnace tube 2, and a furnace chamber 3. The ends of the furnace tube 2 are respectively attached to the surface of the support base 1 via tube supports 5. The furnace chamber 3 is disposed externally of the furnace tube 2 in a sheathing manner, and a heating module 6 is disposed within the furnace chamber 3. Spiral projections with opposite spiral directions are respectively disposed on the inner wall of the front section and the inner wall of the rear section of the furnace tube 2.

[0043] Preferably, the tubular experimental furnace further includes a lifting support frame 4. The lifting support frame 4 is mounted on the bottom of one end of the support base 1. The lifting support frame 4 tilts the upper surface of the support base 1 into a sloped surface with one end higher than the other. The furnace tube 2 is similarly configured with one end higher than the other, with the higher end of the furnace tube 2 serving as the feed end and the lower end serving as the discharge end.

[0044] Preferably, the tubular experimental furnace further includes a rotating unit 7. The rotating unit 7 includes a transmission assembly and a rotation drive assembly. The rotation drive assembly is connected to the transmission assembly, which is in turn connected to the furnace tube 2. Preferably, the rotating unit 7 further includes a speed control assembly, which is connected to the rotation drive assembly. Preferably, the transmission assembly is a gear transmission or a chain transmission.

[0045] Preferably, the length of the tube body with spiral protrusions on the inner wall of the front section of the furnace tube 2 does not exceed 1 / 2 of the total length of the furnace tube 2, and preferably the length of the tube body with spiral protrusions on the inner wall of the front section of the furnace tube 2 is 1 / 10 to 1 / 3 of the total length of the furnace tube 2.

[0046] Preferably, the length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube 2 does not exceed 1 / 2 of the total length of the furnace tube 2, and preferably the length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube 2 is 1 / 10 to 1 / 3 of the total length of the furnace tube 2.

[0047] Preferably, the height of the spiral protrusion along the radial direction of the furnace tube 2 is 1 to 100 mm, preferably 3 to 80 mm, and more preferably 5 to 50 mm.

[0048] Preferably, the spiral protrusions provided on the inner wall of the front section and / or the inner wall of the rear section of the furnace tube 2 are designed as a discontinuous multi-segment interval. Preferably, the spacing between any two adjacent spiral protrusions is no greater than 10-60% of the length of the tube body occupied by any one of the spiral protrusions, preferably 15-40%.

[0049] Preferably, the inner wall of the front section of the furnace tube 2 includes 2 to 20 interval-type spiral protrusions.

[0050] Preferably, the inner wall of the rear section of the furnace tube 2 includes 2 to 20 interval-type spiral protrusions.

[0051] Preferably, the lifting support frame 4 includes a telescopic rod and a lifting drive assembly connected to the telescopic rod. One end of the telescopic rod is arranged at the bottom of the support base 1, and the other end is arranged on the ground or the laboratory table.

[0052] Preferably, the heating module 6 includes 2 to 5 independent heating components. Preferably, the furnace tube 2 is divided into 2 to 5 temperature intervals along its axial direction, and each temperature interval corresponds to a heating component.

[0053] Preferably, the heating component is a resistance wire or a silicon carbon rod.

[0054] Preferably, each temperature interval is provided with a temperature detection device.

[0055] Preferably, the furnace 3 is an openable structure. Preferably, the furnace 3 includes an independent upper furnace and a lower furnace, the upper furnace and the lower furnace are connected by a rotating shaft, and the upper furnace can rotate around the rotating shaft.

[0056] Preferably, the tube support 5 includes a front support frame 501 and a rear support frame 502. The front support frame 501 is connected to the feed end of the furnace tube 2, and the rear support frame 502 is connected to the discharge end of the furnace tube 2.

[0057] Preferably, the furnace tube 2 is detachably connected to the tube support 5. Preferably, the connection method of the furnace tube 2 and the tube support 5 includes but is not limited to a hinge connection, a threaded connection, a snap connection, and a flange connection.

[0058] Preferably, the tubular experimental furnace further comprises a feed bin 8. The feed bin 8 is arranged at the feed end of the furnace tube 2 and is connected to the furnace tube 2.

[0059] Preferably, the tubular experimental furnace further comprises a pushing unit 9. The pushing unit 9 is arranged at the connection between the feed bin 8 and the furnace tube 2. Preferably, the pushing unit 9 includes but is not limited to an air pump push rod pushing device and a spiral pushing device.

[0060] Preferably, the tubular experimental furnace further comprises a material receiving barrel 10. The material receiving barrel 10 is arranged at the discharge end of the furnace tube 2 and is in communication with the furnace tube 2.

[0061] Preferably, the tubular experimental furnace further comprises a control unit 11. The control unit 11 is disposed on the support base 1 or on the ground or on a laboratory table. The control unit 11 is independently connected to the heating module 6, the lifting support frame 4, the rotating unit 7, and the pushing unit 9 for signal communication. Example 1

[0062] A rotary, automatic loading and unloading tubular experimental furnace, characterized in that it comprises a support base 1, a furnace tube 2, and a furnace chamber 3. The ends of the furnace tube 2 are respectively attached to the surface of the support base 1 via tube supports 5. The furnace chamber 3 is disposed externally of the furnace tube 2 in a sheathing manner, and a heating module 6 is disposed within the furnace chamber 3. Spiral projections with opposite spiral directions are respectively disposed on the inner wall of the front section and the inner wall of the rear section of the furnace tube 2. Example 2

[0063] Example 1 was repeated, except that this tubular experimental furnace also included a lifting support frame 4. This lifting support frame 4 was mounted on the bottom of one end of the support base 1. By lifting the lifting support frame 4, the upper surface of the support base 1 was formed into an inclined surface with one end higher and the other lower. The furnace tube 2 was similarly structured with one end higher and the other lower, with the higher end of the furnace tube 2 being the feed end and the lower end being the discharge end. Example 3

[0064] Example 2 was repeated, except that the tubular experimental furnace also included a rotating unit 7. The rotating unit 7 included a transmission assembly and a rotation drive assembly. The rotation drive assembly was connected to the transmission assembly, which was in turn connected to the furnace tube 2. The rotating unit 7 also included a speed control assembly, which was connected to the rotation drive assembly. The transmission assembly was a gear transmission device. Example 4

[0065] Example 3 is repeated, except that the length of the tube body with spiral protrusions on the inner wall of the front section of the furnace tube 2 is 1 / 3 of the total length of the furnace tube 2.

[0066] The length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube 2 is 1 / 3 of the total length of the furnace tube 2.

[0067] The protrusion height of the spiral protrusion along the radial direction of the furnace tube 2 is 30 mm. Example 5

[0068] Example 1 was repeated, except that the spiral protrusions on the front and rear inner walls of the furnace tube 2 were designed as discontinuous multi-segment intervals. The spacing between any two adjacent spiral protrusions was 20% of the length of the tube occupied by any one of the spiral protrusions. Example 6

[0069] Example 5 is repeated, except that the front inner wall of the furnace tube 2 includes a total of 5 sections of spaced spiral protrusions, and the length of each section of the spiral protrusion is equal.

[0070] The inner wall of the rear section of the furnace tube 2 includes a total of five sections of spaced spiral protrusions, and the length of each section of the spiral protrusion is equal. Example 7

[0071] Repeat Example 6, except that the lifting support frame 4 includes a telescopic rod and a lifting drive assembly connected to the telescopic rod. One end of the telescopic rod is set at the bottom of the support base 1, and the other end is set on the ground. Example 8

[0072] Repeat Example 7, except that the heating module 6 includes three independent heating components. The furnace tube 2 is divided into three temperature zones along its axial direction, each corresponding to a heating component. The heating components are resistance wires or silicon carbon rods. Each temperature zone is equipped with a temperature detection device. Example 9

[0073] Repeat Example 8, except that the furnace 3 is an openable structure. The furnace 3 includes an independent upper furnace and a lower furnace, which are connected by a rotating shaft, and the upper furnace can rotate around the rotating shaft. Example 10

[0074] Example 9 is repeated, except that the tube support 5 includes a front support frame 501 and a rear support frame 502. The front support frame 501 is connected to the feed end of the furnace tube 2, and the rear support frame 502 is connected to the discharge end of the furnace tube 2. Example 11

[0075] The embodiment 10 is repeated except that the furnace tube 2 is detachably connected to the tube support 5. The furnace tube 2 and the tube support 5 are connected by flange connection. Example 12

[0076] Example 11 was repeated, except that the tubular experimental furnace further included a feed bin 8. The feed bin 8 was arranged at the feed end of the furnace tube 2 and communicated with the furnace tube 2. Example 13

[0077] Example 12 was repeated, except that the tubular experimental furnace further included a pushing unit 9. The pushing unit 9 was provided at the connection between the feed bin 8 and the furnace tube 2. The pushing unit 9 was an air pump pushing device. Example 14

[0078] Example 13 was repeated, except that the tubular experimental furnace further included a material receiving tube 10. The material receiving tube 10 was arranged at the discharge end of the furnace tube 2 and was in communication with the furnace tube 2. Example 15

[0079] Repeat Example 14, except that the tubular experimental furnace further includes a control unit 11. The control unit 11 is disposed on the support base 1 or on the ground. The control unit 11 is independently connected to the heating module 6, the lifting support frame 4, the rotating unit 7, and the pushing unit 9.

Claims

1. A rotary automatic feeding and discharging tubular experimental furnace, characterized by: The tubular experimental furnace comprises a support base (1), a furnace tube (2), and a furnace chamber (3); both ends of the furnace tube (2) are respectively arranged on the surface of the support base (1) through tube body supports (5); the furnace chamber (3) is arranged outside the tube body of the furnace tube (2) in a covering manner, and a heating module (6) is arranged in the furnace chamber (3); spiral protrusions with opposite spiral directions are respectively arranged on the inner wall of the front section and the inner wall of the rear section of the furnace tube (2).

2. The tubular experimental furnace according to claim 1, characterized in that: The tubular experimental furnace further comprises a lifting support frame (4); the lifting support frame (4) is mounted on the bottom of one end of the support seat (1); the lifting support frame (4) enables the upper surface of the support seat (1) to be an inclined surface with one end higher and the other end lower; the furnace tube (2) correspondingly has a structure with one end higher and the other end lower, the higher end of the furnace tube (2) being the feed end, and the lower end being the discharge end.

3. The tubular experimental furnace according to claim 2, characterized in that: The tubular experimental furnace further comprises a rotating unit (7); the rotating unit (7) comprises a transmission assembly and a rotation drive assembly; the rotation drive assembly is connected to the transmission assembly, and the transmission assembly is connected to the furnace tube (2).

4. The tubular experimental furnace according to claim 3, characterized in that: The rotating unit (7) further comprises a rotation speed control component, which is connected to the rotation drive component.

5. The tubular experimental furnace according to claim 4, characterized in that: The transmission assembly is a gear transmission device or a chain transmission device.

6. The tubular experimental furnace according to claim 2, characterized in that: The length of the tube body with the spiral protrusion on the inner wall of the front section of the furnace tube (2) does not exceed 1 / 2 of the total length of the furnace tube (2); and / or The length of the tube body with the spiral protrusion on the inner wall of the rear section of the furnace tube (2) does not exceed 1 / 2 of the total length of the furnace tube (2); and / or The protrusion height of the spiral protrusion along the radial direction of the furnace tube (2) is 1 to 100 mm.

7. The tubular experimental furnace according to claim 6, characterized in that: The length of the tube body with the spiral protrusion on the inner wall of the front section of the furnace tube (2) is 1 / 10 to 1 / 3 of the total length of the furnace tube (2); and / or The length of the tube body with spiral protrusions on the inner wall of the rear section of the furnace tube (2) is 1 / 10 to 1 / 3 of the total length of the furnace tube (2); and / or The protrusion height of the spiral protrusion along the radial direction of the furnace tube (2) is 3 to 80 mm.

8. The tubular experimental furnace according to claim 2, characterized in that: The spiral protrusions provided on the front inner wall and / or the rear inner wall of the furnace tube (2) are of a discontinuous multi-segment interval design.

9. The tubular experimental furnace according to claim 8, characterized in that: The distance between any two adjacent spiral protrusions is not greater than 10 to 60% of the length of the tube body occupied by any one of the spiral protrusions.

10. The tubular experimental furnace according to claim 9, characterized in that: The distance between any two adjacent spiral protrusions is no greater than 15-40% of the length of the tube body occupied by any one of the spiral protrusions.

11. The tubular experimental furnace according to claim 8, characterized in that: The inner wall of the front section of the furnace tube (2) comprises 2 to 20 interval-type spiral protrusions; and / or The inner wall of the rear section of the furnace tube (2) comprises 2 to 20 sections of spaced spiral protrusions.

12. The tubular experimental furnace according to claim 2, characterized in that: The lifting support frame (4) comprises a telescopic rod and a lifting drive assembly connected to the telescopic rod; one end of the telescopic rod is arranged at the bottom of the support seat (1), and the other end is arranged on the ground or a laboratory table.

13. The tubular experimental furnace according to claim 2, characterized in that: The heating module (6) includes 2 to 5 independent heating components.

14. The tubular experimental furnace according to claim 13, characterized in that: The furnace tube (2) is divided into 2 to 5 temperature zones along its axial direction, and each temperature zone corresponds to a heating component.

15. The tubular experimental furnace according to claim 13, characterized in that: The heating component is a resistance wire or a silicon carbon rod.

16. The tubular experimental furnace according to claim 14, characterized in that: Each temperature zone is equipped with a temperature detection device.

17. The tubular experimental furnace according to claim 2, characterized in that: The furnace (3) is an openable structure; the furnace (3) comprises an independent upper furnace and a lower furnace, the upper furnace and the lower furnace are connected via a rotating shaft, and the upper furnace can rotate around the rotating shaft.

18. The tubular experimental furnace according to claim 2, characterized in that: The tube support (5) comprises a front support frame (501) and a rear support frame (502); the front support frame (501) is connected to the feed end of the furnace tube (2), and the rear support frame (502) is connected to the discharge end of the furnace tube (2).

19. The tubular experimental furnace according to claim 18, characterized in that: The furnace tube (2) is detachably connected to the tube support (5).

20. The tubular experimental furnace according to claim 19, characterized in that: The furnace tube (2) and the tube support (5) are connected in a hinge connection, a threaded connection, a snap connection or a flange connection.

21. The tubular experimental furnace according to any one of claims 2 to 20, characterized in that: The tubular experimental furnace further comprises a feed bin (8); the feed bin (8) is arranged at the feed end of the furnace tube (2) and is connected to the furnace tube (2).

22. The tubular experimental furnace according to claim 21, characterized in that: The tubular experimental furnace further comprises a material pushing unit (9); the material pushing unit (9) is arranged at the connection between the feed bin (8) and the furnace tube (2); and / or The tubular experimental furnace further comprises a material receiving cylinder (10); the material receiving cylinder (10) is arranged at the discharge end of the furnace tube (2) and is in communication with the furnace tube (2).

23. The tubular experimental furnace according to claim 22, characterized in that: The pushing unit (9) is an air pump push rod pushing device or a spiral pushing device.

24. The tubular experimental furnace according to claim 22, characterized in that: The tubular experimental furnace further comprises a control unit (11); the control unit (11) is arranged on a support base (1) or on the ground or on an experimental table; the control unit (11) is independently connected to the heating module (6), the lifting support frame (4), the rotating unit (7), and the pushing unit (9) via signals.

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