Efficient roasting device and method based on plasma flow suspension technology

Abstract

The invention discloses an efficient roasting device and method based on a plasma flow suspension technology, and relates to the field of roasting devices.The efficient roasting device comprises a roasting furnace body, a center mounting frame, a motor fixing plate, a gearbox and a driving motor, and the center mounting frame is fixedly mounted in the center of the inner side of the roasting furnace body; the motor fixing plate is fixedly mounted at the upper end of the center mounting frame, the gearbox is fixedly mounted at the upper end of the motor fixing plate, and the driving motor is fixedly mounted at the upper end of the gearbox. According to the efficient roasting device and method based on the plasma flow suspension technology, an ultra-high-temperature heat source is provided through plasma, a flow suspension heat transfer mode is combined, the uniform roasting effect of materials is achieved within a short time, and the efficient roasting device and method have the advantages of being high in heat efficiency, rapid in temperature rising, clean and environmentally friendly; and the solid particles can be fully mixed and uniformly heated in the air flow through the flowing suspension technology, so that the roasting efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of roasting devices, and in particular to a high-efficiency roasting device and method based on plasma flow suspension technology. Background Art

[0002] The roasting device is a high-temperature processing equipment, which is mainly used to induce physical or chemical changes in materials by heating under conditions below the melting temperature while keeping the solid state. It is widely used in various raw material processing occasions. The Chinese patent with publication number "CN108917386A" discloses "a high-temperature roasting device including a roasting chamber, in which a plurality of rows of rollers arranged horizontally in pairs are fixed, a supporting cylinder is placed on each pair of rollers, and a driving device installed outside the roasting chamber drives the rollers to rotate". Although it can play the role of "facilitating the support rollers to move out and replace materials after the roasting process is completed, it plays an isolating role for the entire heating space, which is beneficial to improve thermal efficiency and reduce the loss of heat dissipation. It can replace the conveying device located in a high-temperature environment, reduce equipment wear and tear, and facilitate production personnel to replace materials", the existing roasting device adopts traditional gas heating or electric heating roasting with limited energy density, resulting in long material roasting time, large heat loss, and high overall energy consumption. In addition, in the fixed bed or fluidized bed roasting mode, the material residence time is uneven, resulting in local over-burning or under-burning, large fluctuations in product quality, resulting in uneven roasting, and temperature control is difficult, which affects the roasting quality and also causes the problem of high pollution emission treatment cost. Summary of the invention

[0003] The main purpose of the present invention is to provide a high-efficiency roasting device and method based on plasma flow suspension technology, which can effectively solve the technical problems raised by the background technology.

[0004] To achieve the above object, the technical solution adopted by the present invention is: The invention discloses a high-efficiency roasting device based on plasma flow suspension technology, comprising a roasting furnace body, a central mounting frame, a motor fixing plate, a gearbox and a driving motor, wherein the central mounting frame is fixedly mounted on the inner center of the roasting furnace body, the motor fixing plate is fixedly mounted on the upper end of the central mounting frame, the gearbox is fixedly mounted on the upper end of the motor fixing plate, the driving motor is fixedly mounted on the upper end of the gearbox, a rotating chassis structure is arranged at the lower end of the roasting furnace body, an input pipe opening and a circulation pipe opening are integrally formed at the front of the outside of the roasting furnace body, and the input pipe opening is located on one side of the circulation pipe opening, a blower bracket is arranged at the outside of the roasting furnace body in front of the input pipe opening, a blower structure is fixedly mounted on the upper end of the blower bracket, a plasma heater is arranged at the front of the roasting furnace body on one side of the blower bracket, and a plasma introduction tube is integrally formed at the top of the plasma heater.

[0005] As a further solution of the present invention, a plurality of insulation tiles and support mounting blocks are fixedly installed on the outer side of the roasting furnace body, the input pipe opening, circulation pipe opening, insulation tiles and support mounting blocks are arranged alternately, a support tripod is fixedly installed on the lower end of the support mounting block, and a sealing cover is movably installed on the upper end of the roasting furnace body.

[0006] As a further solution of the present invention, the rotating chassis structure includes a rotating rod, a connecting seat, a transmission mounting base plate and a chassis cover. The rotating rod is fixedly mounted on the lower end of the output shaft of the gearbox, the connecting seat is fixedly mounted on the outer bottom of the rotating rod, a plurality of transmission mounting base plates are fixedly mounted on the outer side of the connecting seat, and the chassis cover is movably mounted on the bottom of the roasting furnace body.

[0007] As a further solution of the present invention, the rotating rod passes through the motor fixing plate and the central mounting frame, and the end of the transmission mounting base plate away from the connecting seat is fixedly connected to the chassis cover, and the chassis cover is embedded in the interior of the roasting furnace body.

[0008] As a further solution of the present invention, the input pipe opening and the circulation pipe opening are both connected to the interior of the roasting furnace body, the input pipe opening is fixedly installed with an input connecting pipe, and the circulation pipe opening is fixedly installed with a circulation exhaust pipe.

[0009] As a further solution of the present invention, the blower structure includes a blower motor, an air supply barrel, an air intake pipe and an air intake duct. The blower motor is fixedly mounted on the upper end of the blower bracket, the air supply barrel is fixedly mounted on the output end of the rotating shaft of the blower motor, the air intake pipe is integrally formed on the outside of the air supply barrel, and the air intake duct is fixedly mounted on the port of the air intake pipe.

[0010] As a further solution of the present invention, the port of the input connecting pipe is fixedly connected to the port of the air supply barrel, the air intake duct extends to the top of the plasma heater, the upper end of the plasma inlet pipe is fixedly connected to the lower end of the air intake duct, and the port of the circulation exhaust pipe is fixedly connected to the side of the air intake duct.

[0011] As a further solution of the present invention, the roasting furnace body is arranged in a ring shape, the gearbox and the drive motor are located above the center of the roasting furnace body, and the shaft end of the drive motor is fixedly connected to the input end of the gearbox.

[0012] As a further solution of the present invention, a heater bracket is fixedly installed at the bottom of the plasma heater, and the lower ends of the supporting bracket, the blower bracket and the heater bracket are arranged in parallel.

[0013] A method for using a high-efficiency roasting device based on plasma flow suspension technology, the method specifically comprising the following steps: Step 1: The support legs, the blower bracket and the heater bracket respectively support and place the roasting furnace body, the blower motor and the plasma heater, and the sealing cover on the roasting furnace body is opened to put the materials to be roasted into the roasting furnace body; Step 2: The plasma heater performs plasma heating, and the heated plasma is input into the air intake pipe through the plasma introduction pipe. The operation of the blower motor drives the blades in the air supply barrel to rotate. Therefore, when the blades in the air supply barrel rotate, air is taken in through the suction pipe and the air intake pipe, and the heated plasma is guided to the input connecting pipe, so that the plasma enters the annular roasting furnace body through the input pipe opening, and with the help of the gas transportation of the air supply barrel, the gas in the roasting furnace body circulates to generate buoyancy, and the plasma provides an ultra-high temperature heat source, and combined with the flow suspension heat transfer method, the material can achieve a uniform roasting effect in a short time; Step 3: After the plasma heater stops plasma heating and output, the flowing gas in the roasting furnace body is discharged through the circulation pipe port, and then enters the air intake pipe again through the circulation discharge pipe. Therefore, the air supply barrel again inhales gas from the air intake pipe and the air intake pipe and transports it into the roasting furnace body, continuously generating strong airflow, and cooperating with long-term flow suspension for uniform roasting; Step 4: The operation of the driving motor drives the rotating rod to rotate through the gearbox, and the rotating rod drives the transmission mounting base plate and the chassis cover to rotate through the connecting seat, so that the chassis cover rotates continuously in the roasting furnace body. The chassis cover is the chassis part of the roasting furnace body. The continuous rotation of the chassis cover increases the flow rate of gas in the roasting furnace body, or the flow rate of gas in the roasting furnace body is adjusted according to the rotation speed and direction of the chassis cover.

[0014] The above-mentioned embodiments of the present invention can achieve the following beneficial effects: plasma heating is performed by a plasma heater, and the air supply barrel inputs the heated plasma into the annular roasting furnace body, and with the help of the gas delivery of the air supply barrel, the gas in the roasting furnace body circulates to generate buoyancy, and the plasma provides an ultra-high temperature heat source, and combined with the flow suspension heat transfer method, the material can achieve a uniform roasting effect in a short time, and the plasma can provide a high-temperature roasting environment of 4000-6000°C, which has the advantages of high thermal efficiency, rapid heating, clean and environmental protection, and the flow suspension technology can make the solid particles fully mixed and evenly heated in the airflow, thereby improving the roasting efficiency; By utilizing the circulating exhaust of the circulating exhaust pipe and the continuous air supply of the air supply barrel, after the plasma heater stops plasma heating and output, the flowing gas in the roasting furnace body is discharged through the circulating pipe port, and then enters the air intake pipe again through the circulating exhaust pipe. Therefore, the air supply barrel again inhales gas from the air intake pipe and the air intake pipe and transports it into the roasting furnace body, continuously generating strong airflow, and cooperating with long-term flow suspension for uniform roasting, thereby increasing the gas-solid contact area, greatly improving the heat exchange efficiency, and reducing roasting energy consumption; The continuous rotation of the chassis cover is used to increase the gas flow rate in the roasting furnace, or the gas flow rate in the roasting furnace is adjusted according to the rotation speed and direction of the chassis cover, so as to adjust the plasma energy and airflow parameters and optimize the roasting curve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of a high-efficiency roasting device based on plasma flow suspension technology of the present invention; Figure 2 A side view of a high-efficiency roasting device based on plasma flow suspension technology according to the present invention; Figure 3 A top view of a high-efficiency roasting device based on plasma flow suspension technology according to the present invention; Figure 4 This is a disassembled diagram of the blower structure in a high-efficiency roasting device based on plasma flow suspension technology of the present invention; Figure 5 It is an enlarged view of a baking furnace body in a high-efficiency baking device based on plasma flow suspension technology of the present invention; Figure 6 This is a bottom view of a roasting furnace body in a high-efficiency roasting device based on plasma flow suspension technology of the present invention; Figure 7 It is a partial structural schematic diagram of a roasting furnace body and a rotating chassis structure in a high-efficiency roasting device based on plasma flow suspension technology of the present invention; Figure 8 This is an enlarged view of a plasma heater in a high-efficiency roasting device based on plasma flow suspension technology of the present invention.

[0016] In the figure: 1. roasting furnace body; 2. support mounting block; 3. support tripod; 4. insulation tile; 5. center mounting frame; 6. motor fixing plate; 7. gearbox; 8. drive motor; 9. rotating chassis structure; 10. rotating rod; 11. connecting seat; 12. transmission mounting base plate; 13. chassis cover; 14. input pipe mouth; 15. input connecting pipe; 16. circulation pipe mouth; 17. circulation exhaust pipe; 18. blower bracket; 19. blower structure; 20. blower motor; 21. air barrel; 22. suction pipe; 23. air inlet duct; 24. heater bracket; 25. plasma heater; 26. plasma introduction pipe; 27. sealing cover. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0018] like Figure 1-Figure 8As shown, a high-efficiency roasting device based on plasma flow suspension technology includes a roasting furnace body 1, a central mounting frame 5, a motor fixing plate 6, a gearbox 7 and a driving motor 8, the central mounting frame 5 is fixedly mounted on the inner center of the roasting furnace body 1, the motor fixing plate 6 is fixedly mounted on the upper end of the central mounting frame 5, the gearbox 7 is fixedly mounted on the upper end of the motor fixing plate 6, the driving motor 8 is fixedly mounted on the upper end of the gearbox 7, a rotating chassis structure 9 is arranged at the lower end of the roasting furnace body 1, an input pipe opening 14 and a circulation pipe opening 16 are integrally formed at the front of the outside of the roasting furnace body 1, and the input pipe opening 14 is located on one side of the circulation pipe opening 16, a blower bracket 18 is arranged on the outside of the roasting furnace body 1 in front of the input pipe opening 14, a blower structure 19 is fixedly mounted on the upper end of the blower bracket 18, a plasma heater 25 is arranged at the front of the roasting furnace body 1 on one side of the blower bracket 18, and a plasma introduction tube 26 is integrally formed on the top of the plasma heater 25.

[0019] In this embodiment, a plurality of heat-insulating tiles 4 and support mounting blocks 2 are fixedly installed on the outer side of the roasting furnace body 1, and the input pipe opening 14, the circulation pipe opening 16, the heat-insulating tiles 4 and the support mounting blocks 2 are arranged alternately. A support bracket 3 is fixedly installed on the lower end of the support mounting block 2, and a sealing cover 27 is movably installed on the upper end of the roasting furnace body 1. The support bracket 3 and the support mounting block 2 play the effect of supporting and placing the roasting furnace body 1, and the heat-insulating tiles 4 are used to isolate the high temperature of the roasting furnace body 1.

[0020] In this embodiment, the rotating chassis structure 9 includes a rotating rod 10, a connecting seat 11, a transmission mounting base plate 12 and a chassis cover 13. The rotating rod 10 is fixedly mounted on the lower end of the output shaft of the gearbox 7, the connecting seat 11 is fixedly mounted on the outer bottom of the rotating rod 10, a plurality of transmission mounting base plates 12 are fixedly mounted on the outer side of the connecting seat 11, and the chassis cover 13 is movably mounted on the bottom of the roasting furnace body 1.

[0021] In this embodiment, the rotating rod 10 passes through the motor fixing plate 6 and the center mounting frame 5, and the end of the transmission mounting base plate 12 away from the connecting seat 11 is fixedly connected to the chassis cover 13, and the chassis cover 13 is embedded in the interior of the roasting furnace body 1. When the driving motor 8 is running, the rotating rod 10 is driven to rotate through the gearbox, and the rotating rod 10 then drives the connecting seat 11, the transmission mounting base plate 12 and the chassis cover 13 to rotate.

[0022] In this embodiment, the input pipe port 14 and the circulation pipe port 16 are both connected to the interior of the roasting furnace body 1, the port of the input pipe port 14 is fixedly installed with an input connecting pipe 15, and the port of the circulation pipe port 16 is fixedly installed with a circulation exhaust pipe 17, and the input connecting pipe 15 and the circulation exhaust pipe 17 serve as the little brothers for gas input and exhaust.

[0023] In this embodiment, the blower structure 19 includes a blower motor 20, an air supply barrel 21, an air intake pipe 22 and an air intake pipe 23. The blower motor 20 is fixedly mounted on the upper end of the blower bracket 18, the air supply barrel 21 is fixedly mounted on the output end of the rotating shaft of the blower motor 20, the air intake pipe 22 is integrally formed on the outside of the air supply barrel 21, and the air intake pipe 23 is fixedly mounted on the port of the air intake pipe 22. The air intake pipe 23 serves to transport gas to the air intake pipe 22.

[0024] In this embodiment, the port of the input connecting pipe 15 is fixedly connected to the port of the air supply barrel 21, the air intake pipe 23 extends to the top of the plasma heater 25, the upper end of the plasma inlet pipe 26 is fixedly connected to the lower end of the air intake pipe 23, and the port of the circulation exhaust pipe 17 is fixedly connected to the side of the air intake pipe 23. The plasma heater 25 transports the heated plasma to the air intake pipe 23 through the plasma inlet pipe 26, and the reflux gas in the roasting furnace body 1 is transported to the air intake pipe 23 through the circulation exhaust pipe 17.

[0025] In this embodiment, the roasting furnace body 1 is arranged in a ring shape, the gearbox 7 and the drive motor 8 are located above the center of the roasting furnace body 1, the rotating shaft end of the drive motor 8 is fixedly connected to the input end of the gearbox 7, and the roasting furnace body 1 can provide continuous circulation movement of the airflow.

[0026] In this embodiment, a heater bracket 24 is fixedly installed at the bottom of the plasma heater 25 , and the lower ends of the support bracket 3 , the blower bracket 18 and the heater bracket 24 are arranged in parallel, and the heater bracket 24 plays a role of supporting the plasma heater 25 .

[0027] It should be noted that the present invention is a high-efficiency roasting device and method based on plasma flow suspension technology. When in use, the support bracket 3, the blower bracket 18 and the heater bracket 24 respectively support and place the roasting furnace body 1, the blower motor 20 and the plasma heater 25. The sealing cover 27 on the roasting furnace body 1 is opened to put the material to be roasted into the roasting furnace body 1. The plasma heater 25 performs plasma heating. The heated plasma is input into the air intake pipe 23 through the plasma introduction pipe 26. The operation of the blower motor 20 drives the blades in the air supply barrel 21 to rotate. Therefore, when the blades in the air supply barrel 21 rotate, air is taken in through the suction pipe 22 and the air intake pipe 23, and the heated plasma is guided to the input connecting pipe 15, so that the plasma enters the annular roasting furnace body 1 through the input pipe port 14, and with the help of the gas transportation of the air supply barrel 21, the gas in the roasting furnace body 1 circulates to generate buoyancy, and the ultra-high temperature heat source is provided by plasma, and combined with the flow suspension heat transfer method, the material can achieve a uniform roasting effect in a short time. After the plasma heater 25 stops plasma heating and output, the flowing gas in the roasting furnace body 1 is discharged through the circulation pipe port 16, and then enters the air intake pipe 23 again through the circulation discharge pipe 17. Therefore, the air supply barrel 21 again inhales gas from the air intake pipe 22 and the air intake pipe 23 and transports it into the roasting furnace body 1, continuously generating strong airflow, and cooperating with long-term flow suspension for uniform roasting; The operation of the driving motor 8 drives the rotating rod 10 to rotate through the gearbox 7, and the rotating rod 10 drives the transmission mounting base plate 12 and the chassis cover 13 to rotate through the connecting seat 11, so that the chassis cover 13 rotates continuously in the roasting furnace body 1. The chassis cover 13 is the chassis part of the roasting furnace body 1. The continuous rotation of the chassis cover 13 increases the flow rate of the gas in the roasting furnace body 1, or the flow rate of the gas in the roasting furnace body 1 is also adjusted according to the rotation speed and direction adjustment of the chassis cover 13.

Claims

1. A high-efficiency roasting device based on plasma flow suspension technology, comprising a roasting furnace body (1), a central mounting frame (5), a motor fixing plate (6), a gearbox (7) and a drive motor (8), wherein the central mounting frame (5) is fixedly mounted at the inner center of the roasting furnace body (1), the motor fixing plate (6) is fixedly mounted on the upper end of the central mounting frame (5), the gearbox (7) is fixedly mounted on the upper end of the motor fixing plate (6), and the drive motor (8) is fixedly mounted on the upper end of the gearbox (7), characterized in that: A rotating chassis structure (9) is provided at the lower end of the roasting furnace body (1); an input pipe opening (14) and a circulation pipe opening (16) are integrally formed at the front of the outside of the roasting furnace body (1), and the input pipe opening (14) is located on one side of the circulation pipe opening (16); a blower bracket (18) is provided at the outside of the roasting furnace body (1) in front of the input pipe opening (14); a blower structure (19) is fixedly mounted at the upper end of the blower bracket (18); a plasma heater (25) is provided at the front of the roasting furnace body (1) on one side of the blower bracket (18); and a plasma introduction tube (26) is integrally formed at the top of the plasma heater (25).

2. The high-efficiency roasting device based on plasma flow suspension technology according to claim 1 is characterized in that: A plurality of heat-insulating tiles (4) and a support mounting block (2) are fixedly mounted on the outer side of the roasting furnace body (1); the input pipe opening (14), the circulation pipe opening (16), the heat-insulating tiles (4) and the support mounting block (2) are arranged alternately; a support bracket (3) is fixedly mounted on the lower end of the support mounting block (2); and a sealing cover (27) is movably mounted on the upper end of the roasting furnace body (1).

3. The high-efficiency roasting device based on plasma flow suspension technology according to claim 1 is characterized in that: The rotating chassis structure (9) comprises a rotating rod (10), a connecting seat (11), a transmission mounting base plate (12) and a chassis cover (13); the rotating rod (10) is fixedly mounted on the lower end of the output shaft of the gearbox (7); the connecting seat (11) is fixedly mounted on the outer bottom of the rotating rod (10); a plurality of transmission mounting base plates (12) are fixedly mounted on the outer side of the connecting seat (11); and the chassis cover (13) is movably mounted on the bottom of the roasting furnace body (1).

4. The high-efficiency roasting device based on plasma flow suspension technology according to claim 3 is characterized in that: The rotating rod (10) passes through the motor fixing plate (6) and the central mounting frame (5), and one end of the transmission mounting base plate (12) away from the connecting seat (11) is fixedly connected to the chassis cover (13), and the chassis cover (13) is embedded in the interior of the roasting furnace body (1).

5. The high-efficiency roasting device based on plasma flow suspension technology according to claim 1 is characterized in that: The input pipe opening (14) and the circulation pipe opening (16) are both connected to the interior of the roasting furnace body (1); an input connecting pipe (15) is fixedly installed at the end of the input pipe opening (14); and a circulation discharge pipe (17) is fixedly installed at the end of the circulation pipe opening (16).

6. The high-efficiency roasting device based on plasma flow suspension technology according to claim 5, characterized in that: The blower structure (19) comprises a blower motor (20), an air supply barrel (21), an air suction pipe (22) and an air intake pipe (23); the blower motor (20) is fixedly mounted on the upper end of the blower bracket (18); the air supply barrel (21) is fixedly mounted on the output end of the rotating shaft of the blower motor (20); the air suction pipe (22) is integrally formed on the outer side of the air supply barrel (21); and the air intake pipe (23) is fixedly mounted on the end of the air suction pipe (22).

7. The high-efficiency roasting device based on plasma flow suspension technology according to claim 6 is characterized in that: The port of the input connecting pipe (15) is fixedly connected to the port of the air supply barrel (21), the air intake pipe (23) extends to the top of the plasma heater (25), the upper end of the plasma introduction pipe (26) is fixedly connected to the lower end of the air intake pipe (23), and the port of the circulation exhaust pipe (17) is fixedly connected to the side of the air intake pipe (23).

8. The high-efficiency roasting device based on plasma flow suspension technology according to claim 1 is characterized in that: The roasting furnace body (1) is arranged in a ring shape, the gearbox (7) and the drive motor (8) are located above the center of the roasting furnace body (1), and the rotating shaft end of the drive motor (8) is fixedly connected to the input end of the gearbox (7).

9. The high-efficiency roasting device based on plasma flow suspension technology according to claim 2, characterized in that: A heater bracket (24) is fixedly mounted on the bottom of the plasma heater (25), and the lower ends of the supporting bracket (3), the blower bracket (18) and the heater bracket (24) are arranged in parallel.

10. A method for using the high-efficiency roasting device based on plasma flow suspension technology as claimed in any one of claims 1 to 9, characterized in that: The method specifically comprises the following steps: Step 1: The support stand (3), the blower support (18) and the heater support (24) respectively support and place the roasting furnace body (1), the blower motor (20) and the plasma heater (25), and the sealing cover (27) on the roasting furnace body (1) is opened to put the material to be roasted into the roasting furnace body (1); Step 2: The plasma heater (25) performs plasma heating, and the heated plasma is input into the air inlet pipe (23) through the plasma introduction pipe (26). The operation of the blower motor (20) drives the blades in the air supply barrel (21) to rotate. Therefore, when the blades in the air supply barrel (21) rotate, air is taken in through the air intake pipe (22) and the air inlet pipe (23), and the heated plasma is guided to the input connecting pipe (15), so that the plasma enters the annular roasting furnace body (1) through the input pipe opening (14), and with the help of the gas transportation of the air supply barrel (21), the gas in the roasting furnace body (1) circulates to generate buoyancy, and the plasma provides an ultra-high temperature heat source. In combination with the flow suspension heat transfer method, the material can achieve a uniform roasting effect in a short time. Step 3: After the plasma heater (25) stops plasma heating and output, the flowing gas in the roasting furnace body (1) is discharged through the circulation pipe port (16), and then enters the air intake pipe (23) again through the circulation discharge pipe (17). Therefore, the air supply barrel (21) again sucks gas from the air intake pipe (22) and the air intake pipe (23) and transports it into the roasting furnace body (1), continuously generating a strong airflow, and cooperating with a long period of flow suspension to achieve uniform roasting; Step 4: The operation of the driving motor (8) drives the rotating rod (10) to rotate through the gearbox (7), and the rotating rod (10) drives the transmission mounting base plate (12) and the chassis cover (13) to rotate through the connecting seat (11), so that the chassis cover (13) rotates continuously in the roasting furnace body (1). The chassis cover (13) is the chassis part of the roasting furnace body (1). The continuous rotation of the chassis cover (13) increases the flow rate of the gas in the roasting furnace body (1), or the flow rate of the gas in the roasting furnace body (1) is also adjusted according to the rotation speed and direction adjustment of the chassis cover (13).

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