Plasma pulverized coal burner for circulating fluidized bed and process

Abstract

The invention relates to the technical field of circulating fluidized beds, and discloses a plasma pulverized coal burner for a circulating fluidized bed, which comprises a circulating fluidized bed boiler, a lower air chamber is arranged on the circulating fluidized bed boiler, an air distribution plate is arranged in the circulating fluidized bed boiler, and a side air pipe is mounted on one side of the lower air chamber; a pulverized coal combustion mechanism is arranged on one side of the circulating fluidized bed boiler; according to the invention, high-temperature plasma arc is utilized to heat pulverized coal, combustion is complete, soot is not generated, hot air enters the lower air chamber, ash is conveyed to the upper space of the air distribution plate of the circulating fluidized bed, and the ash is fully combusted through deep fusion of the plasma pulverized coal burner and the circulating fluidized bed process. Efficient and stable combustion of pulverized coal under the low-temperature condition is achieved, the load adjusting capacity of the boiler is improved, the problem that fuel oil or natural gas needs to be consumed during cold-state starting is solved, and meanwhile the problem of ash heat value loss caused by insufficient combustion of low-quality coal is solved.

Description

Technical Field

[0001] This invention relates to the field of circulating fluidized bed technology, specifically to a plasma pulverized coal burner and process for circulating fluidized beds. Background Technology

[0002] In the operation of circulating fluidized bed boilers, traditional pulverized coal combustion methods suffer from problems such as high ignition energy consumption, the need for large amounts of fuel oil or natural gas for boiler startup and low-load stable combustion, poor adaptability to low-volatile coal types, limited combustion efficiency, and difficulty in controlling pollutant emissions. In existing technologies, plasma ignition technology is often used. This technology has been applied in the field of pulverized coal boilers, and its typical structure includes:

[0003] Magnetic stabilized air plasma generator: It uses a DC arc (280~350A) to generate 5000K high temperature plasma at a gas pressure of 0.01-0.03MPa.

[0004] Multi-stage burner design: By vertically feeding concentrated pulverized coal into the center of the plasma torch, the volatile matter content of the pulverized coal is increased by 80%, and the ignition delay time is ≤1 second.

[0005] Film cooling technology: forms a protective film on the burner wall to prevent high-temperature erosion and coking.

[0006] While the above technologies can solve the ignition problem of pulverized coal boilers, they have some drawbacks: plasma pulverized coal burners are incompatible with circulating fluidized bed processes. Traditional plasma burners adopt an internal combustion design, and the ash produced enters the lower air chamber and cannot pass through the air cap on the air distribution plate, making them unsuitable for the fluidized combustion characteristics of circulating fluidized bed boilers.

[0007] Therefore, we propose a plasma pulverized coal burner and process for circulating fluidized beds. Summary of the Invention

[0008] (a) Technical problems to be solved

[0009] To address the shortcomings of existing technologies, this invention provides a plasma pulverized coal burner and process for circulating fluidized beds, solving the problems of incompatibility between existing plasma pulverized coal burners and circulating fluidized bed processes, and the fact that traditional plasma burners, which employ an internal combustion design, produce ash and slag that enters the lower air chamber and cannot pass through the air caps on the air distribution plate, thus failing to adapt to the fluidized combustion characteristics of circulating fluidized bed boilers.

[0010] (II) Technical Solution

[0011] To achieve the above objectives, the present invention is implemented through the following technical solution: a plasma pulverized coal burner for circulating fluidized bed, comprising a circulating fluidized bed boiler, wherein a lower air chamber is provided on the circulating fluidized bed boiler, an air distribution plate is provided inside the circulating fluidized bed boiler, a side air duct is installed on one side of the lower air chamber, and a pulverized coal combustion mechanism is provided on one side of the circulating fluidized bed boiler.

[0012] The pulverized coal combustion mechanism includes a pulverized coal cyclone separator. A cathode is disposed on the outer side of the pulverized coal cyclone separator. A permanent magnet back seat is mounted on the surface of the pulverized coal cyclone separator. An anode is disposed on the inner wall of the pulverized coal cyclone separator. The lower end of the anode is a flare outlet. An insulating connector is disposed between the anode and the permanent magnet back seat. A plasma combustion space is disposed between the cathode and the anode. A pulverized coal inlet pipe is disposed on one side of the pulverized coal cyclone separator, allowing the pulverized coal mixture airflow to enter the pulverized coal cyclone separator tangentially. A hot air outlet pipe passes through the middle of the permanent magnet back seat. The other end of the hot air outlet pipe is connected to the primary air pipe. The lower end of the cathode is connected to an ash outlet pipe through an insulating component. The ash outlet pipe is connected to a circulating fluidized bed boiler. A cooling section is disposed in the anode.

[0013] An auxiliary mechanism is provided on the surface of the pulverized coal inlet pipe. The auxiliary mechanism includes a crushing component, a beating component, and a driving component. The driving component is used to drive the crushing component and the beating component. The crushing component is used to crush the pulverized coal, and the beating component is used to vibrate the pulverized coal adhering to the inside of the pipe.

[0014] Preferably, the cooling section includes a cooling water inlet pipe and a cooling water outlet pipe, both of which are disposed in the inner wall of the anode. Through the above-mentioned components, cooling water can enter through the cooling water inlet pipe, cool the anode, and then be discharged through the cooling water outlet pipe.

[0015] Preferably, the crushing assembly includes a rotating component rotatably connected to the inner wall of the pulverized coal inlet pipe. The inner ring of the rotating component is fixedly connected to multiple crushing plates for impacting the pulverized coal. The inner wall of the pulverized coal inlet pipe is fixedly connected to a guide shroud. Through the above components, after the pulverized coal mixture airflow enters the pulverized coal inlet pipe, the guide shroud can guide the airflow to the crushing plates. The agglomerated pulverized coal will impact the crushing plates and break them up. At the same time, the drive assembly can control the rotation of the rotating ring and the crushing plates to improve the crushing effect.

[0016] Preferably, the rotating component includes an inner ring and a plurality of balls, the plurality of balls being rotatably connected to the inner wall of the inner ring. Through the above-mentioned components, when the rotating component rotates, the inner ring cooperates with the balls to reduce friction.

[0017] Preferably, the tapping assembly is provided in two sets. The tapping assembly includes multiple hollow seats fixed to the surface of the pulverized coal inlet pipe. A rotating shaft is rotatably connected to the inner wall of the hollow seat. Multiple tapping elements are fixedly connected to the surface of the rotating shaft. A fixing ring is fixedly connected to the surface of the rotating shaft. A spring is sleeved on the surface of the rotating shaft. The two ends of the spring are fixedly connected to the fixing ring and the surface of the hollow seat, respectively. Through the above components, the drive assembly can control the rotating shaft to rotate. After rotating to a certain position, the spring can drive the rotating shaft to reset. The tapping elements can tap the pulverized coal inlet pipe, shaking off the pulverized coal adhering to it, which then enters the pulverized coal cyclone separator with the airflow.

[0018] Preferably, the striking component is composed of a cylindrical rod and a ball fixed to one end of the cylindrical rod.

[0019] Preferably, the drive assembly includes an outer ring rotatably connected to the inner wall of the pulverized coal inlet pipe. A gear ring is fixedly connected to the surface of the outer ring. A gear is rotatably connected to the inner wall of the pulverized coal inlet pipe, and the gear meshes with the gear ring. A drive motor is mounted on the surface of the pulverized coal inlet pipe, and the output end of the drive motor is fixedly connected to the gear. A transmission part is provided between the outer ring and the rotating component, and a transmission part is provided between the outer ring and the rotating shaft. Through the above components, during driving, the drive motor drives the gear to rotate, and the gear engages with the gear ring to drive the outer ring to rotate. Subsequently, the transmission part controls the rotation of the rotating component, and the transmission part controls the rotation of the rotating shaft.

[0020] Preferably, the transmission part includes a strong magnetic ring 1 fixed in the inner wall of the outer ring, and a strong magnetic ring 2 fixedly connected to the surface of the rotating part. Through the above components, due to the attraction between the strong magnetic ring 1 and the strong magnetic ring 2, the rotating part can be driven to rotate when the outer ring rotates.

[0021] Preferably, the transmission part two includes a residual tooth ring fixed on the surface of the outer ring, and a gear two is fixedly connected to the surface of the rotating shaft. Through the above components, after the outer ring drives the residual tooth ring to rotate to a certain position, the residual tooth ring meshes with the gear two and controls the rotation of the gear two and the rotating shaft. After the residual tooth ring loses contact with the gear two, the spring drives the rotating shaft to reset.

[0022] A process for a plasma pulverized coal burner for a circulating fluidized bed includes the following steps:

[0023] Step 1: First, the coal powder mixture airflow is introduced into the coal powder inlet pipe. The guide hood can guide the coal powder to the crushing plate. The coal powder clumps can collide with the crushing plate to achieve crushing. At the same time, the drive component can control the rotation of the rotating parts and the crushing plate to improve the crushing effect. The drive component can also control the operation of the beater component to beat the pipeline and shake off the coal powder, which enters the coal powder cyclone separator tangentially with the airflow.

[0024] Step 2: After the coal powder enters the coal powder cyclone separator, the plasma combustion space formed by the cathode and anode allows the coal powder to burn in this space. The high-temperature electric arc generated by the cathode and anode will rotate at high speed under the action of the permanent magnet back seat, forming a high-temperature plasma field. When coal powder enters, it will burn rapidly and release a large amount of heat. The cooling water inlet pipe and cooling water outlet pipe in the anode can dissipate heat from the anode.

[0025] Step 3: The ash and slag produced by the pulverized coal combustion are separated by the principle of inertia and transported to the top of the fluidized bed air distribution plate through the ash and slag outlet pipe. The separated hot air is turned to the upper hot air outlet pipe and enters the primary air duct to heat the lower air chamber to 700℃.

[0026] In summary, the technical effects and advantages of this invention are as follows:

[0027] 1. In this invention, a high-temperature plasma arc is used to heat pulverized coal, ensuring complete combustion without producing soot. Hot air enters the lower air chamber, and ash is transported to the upper space of the circulating fluidized bed air distribution plate. Through the deep integration of the plasma pulverized coal burner and the circulating fluidized bed process, efficient and stable combustion of pulverized coal under low-temperature conditions is achieved, improving the boiler load regulation capability, eliminating the need for fuel oil or natural gas consumption during cold start-up, and solving the problem of ash calorific value loss caused by incomplete combustion of low-quality coal.

[0028] 2. In this invention, the crushing component is controlled to rotate by the driving component. The rotating part in the crushing component drives the crushing plate to rotate, which can realize the crushing treatment of the incoming coal powder mixture airflow. The agglomerated coal powder will collide with the crushing plate and break it up. The guide cover can better guide the coal powder to the crushing plate.

[0029] 3. In this invention, the operation of the beating component is controlled by the driving component, so that the beating component intermittently beats and vibrates the coal powder inlet pipe, shaking off the adsorbed coal powder, which then enters the coal powder cyclone separator with the airflow. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention;

[0031] Figure 2 This is a partial cross-sectional view of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention.

[0032] Figure 3 This is a schematic diagram of the auxiliary mechanism structure of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention;

[0033] Figure 4 This is a schematic diagram of the auxiliary mechanism of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention from another perspective;

[0034] Figure 5 This is a cross-sectional schematic diagram of the auxiliary mechanism of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention;

[0035] Figure 6 This is a schematic diagram of the auxiliary mechanism of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention;

[0036] Figure 7 This is a partial structural diagram of the auxiliary mechanism of a plasma pulverized coal burner for a circulating fluidized bed according to the present invention.

[0037] In the diagram: 1. Circulating fluidized bed boiler; 2. Lower air chamber; 3. Air distribution plate; 4. Primary air duct; 5. Pulverized coal cyclone separator; 6. Auxiliary mechanism; 61. Rotating component; 611. Inner ring; 612. Ball bearing; 62. Crushing plate; 63. Guide cover; 64. Drive assembly; 641. Outer ring; 642. Gear 1; 643. Drive motor; 644. Full gear ring; 645. Residual gear ring; 646. Gear 2; 647. Strong... Magnetic ring 1; 648, Strong magnetic ring 2; 65, Beating assembly; 651, Rotating shaft; 652, Beating component; 653, Fixed ring; 654, Spring; 655, Hollow seat; 7, Cathode; 8, Anode; 9, Plasma combustion space; 10, Permanent magnet rear seat; 11, Cooling water inlet pipe; 12, Cooling water outlet pipe; 13, Hot air outlet pipe; 14, Pulverized coal inlet pipe; 15, Ash and slag outlet pipe; 16, Insulating connector. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] refer to Figure 1 - Figure 7 The illustrated plasma pulverized coal burner for circulating fluidized bed includes a circulating fluidized bed boiler with a lower air chamber, an air distribution plate inside the circulating fluidized bed boiler, a side air duct installed on one side of the lower air chamber, and a pulverized coal combustion mechanism on one side of the circulating fluidized bed boiler.

[0040] The pulverized coal combustion mechanism includes a pulverized coal cyclone separator. A cathode is located on the outer side of the pulverized coal cyclone separator. A permanent magnet seat is mounted on the surface of the pulverized coal cyclone separator. An anode is located on the inner wall of the pulverized coal cyclone separator, with its lower end serving as a flare outlet. An insulating connector is provided between the anode and the permanent magnet seat. A plasma combustion space is provided between the cathode and the anode. A pulverized coal inlet pipe is located on one side of the pulverized coal cyclone separator, allowing the pulverized coal mixture to enter the pulverized coal cyclone separator tangentially. A hot air outlet pipe passes through the middle of the permanent magnet seat, and the other end of the hot air outlet pipe is connected to a primary air duct. The lower end of the cathode is connected to an ash outlet pipe via an insulating component. The ash outlet pipe is connected to a circulating fluidized bed boiler. A cooling section is provided in the anode. An auxiliary mechanism is provided on the surface of the pulverized coal inlet pipe, including a crushing component, a beating component, and a driving component. The driving component drives the crushing and beating components. The crushing component crushes the pulverized coal, and the beating component vibrates the pulverized coal adhering to the pipe.

[0041] The cooling section includes a cooling water inlet pipe and a cooling water outlet pipe, both of which are located inside the inner wall of the anode. Cooling water can enter through the cooling water inlet pipe to cool the anode, and then be discharged through the cooling water outlet pipe.

[0042] The crushing component includes a rotating part that is rotatably connected to the inner wall of the pulverized coal inlet pipe. The inner ring of the rotating part is fixedly connected with multiple crushing plates for impacting the pulverized coal. The inner wall of the pulverized coal inlet pipe is fixedly connected with a guide cover. The rotating part includes an inner ring and multiple balls, and the multiple balls are rotatably connected to the inner wall of the inner ring.

[0043] In this implementation scheme: after the coal powder mixture airflow enters the coal powder inlet pipe, the guide shroud can guide the airflow to the crushing plate. The agglomerated coal powder will collide with the crushing plate and break it up. At the same time, the drive component can control the rotation of the rotating ring and the crushing plate to improve the crushing effect. When the rotating part is rotating, the inner ring cooperates with the ball bearings to reduce friction.

[0044] The striking assembly is provided in two sets. The striking assembly includes multiple hollow seats fixed on the surface of the pulverized coal inlet pipe. A rotating shaft is rotatably connected to the inner wall of the hollow seat. Multiple striking parts are fixedly connected to the surface of the rotating shaft. A fixing ring is fixedly connected to the surface of the rotating shaft. A spring is sleeved on the surface of the rotating shaft. The two ends of the spring are fixedly connected to the fixing ring and the surface of the hollow seat, respectively. The striking parts are composed of a cylindrical rod and a ball fixed to one end of the cylindrical rod.

[0045] In this implementation scheme: the drive component can control the rotating shaft to rotate. After rotating to a certain position, the spring can drive the rotating shaft to reset. The beater can beat the pulverized coal inlet pipe to shake off the pulverized coal adhering to it, which then enters the pulverized coal cyclone separator along with the airflow.

[0046] The drive assembly includes an outer ring rotatably connected to the inner wall of the pulverized coal inlet pipe. A gear ring is fixedly connected to the surface of the outer ring. A gear is rotatably connected to the inner wall of the pulverized coal inlet pipe, and the gear meshes with the gear ring. A drive motor is mounted on the surface of the pulverized coal inlet pipe, and the output end of the drive motor is fixedly connected to the gear. A transmission part is provided between the outer ring and the rotating component. The transmission part includes a strong magnetic ring fixed in the inner wall of the outer ring. A strong magnetic ring is fixedly connected to the surface of the rotating component. A transmission part is provided between the outer ring and the rotating shaft. The transmission part includes a residual gear ring fixed to the surface of the outer ring. A gear is fixedly connected to the surface of the rotating shaft.

[0047] In this implementation scheme: During driving, the drive motor drives gear one to rotate. Gear one engages with the complete gear ring, driving the outer ring to rotate. Due to the attraction between strong magnetic ring one and strong magnetic ring two, the outer ring can drive the rotating parts to rotate. After the outer ring drives the residual gear ring to a certain position, the residual gear ring meshes with gear two and controls gear two and the rotating shaft to rotate. After the residual gear ring loses contact with gear two, the spring drives the rotating shaft to reset.

[0048] A process for a plasma pulverized coal burner for a circulating fluidized bed includes the following steps:

[0049] Step 1: First, the coal powder mixture airflow is introduced into the coal powder inlet pipe. The guide hood can guide the coal powder to the crushing plate. The coal powder clumps can collide with the crushing plate to achieve crushing. At the same time, the drive component can control the rotation of the rotating parts and the crushing plate to improve the crushing effect. The drive component can also control the operation of the beater component to beat the pipeline and shake off the coal powder, which enters the coal powder cyclone separator tangentially with the airflow.

[0050] Step 2: After the coal powder enters the coal powder cyclone separator, the plasma combustion space formed by the cathode and anode allows the coal powder to burn in this space. The high-temperature electric arc generated by the cathode and anode will rotate at high speed under the action of the permanent magnet back seat, forming a high-temperature plasma field. When coal powder enters, it will burn rapidly and release a large amount of heat. The cooling water inlet pipe and cooling water outlet pipe in the anode can dissipate heat from the anode.

[0051] Step 3: The ash and slag produced by the combustion of pulverized coal are separated by the principle of inertia and transported to the top of the fluidized bed air distribution plate through the ash and slag outlet pipe. The separated hot air is turned to the upper hot air outlet pipe and enters the primary air duct to heat the lower air chamber to 700℃.

[0052] The working principle of this invention is as follows: When in use, the coal powder mixture airflow is first introduced into the coal powder inlet pipe. After entering the coal powder inlet pipe, the coal powder is guided by the guide cover, causing the coal powder mixture airflow to hit the crushing plate and break up the clumps of coal powder. At the same time, the drive motor is turned on, and the drive motor drives gear one to rotate. Gear one engages with the complete gear ring, which drives the outer ring to rotate. When the outer ring rotates, due to the attraction between strong magnetic ring one and strong magnetic ring two, the outer ring can drive the rotating parts and the crushing plate to rotate. At the same time, the outer ring can drive the residual gear ring to rotate. After rotating to a certain position, the residual gear ring meshes with gear two and controls gear two and the rotating shaft to rotate. After the residual gear ring loses contact with gear two, the spring drives the rotating shaft to reset, knocking the coal powder inlet pipe, shaking off the contaminated coal powder, and feeding it along with the airflow.

[0053] After the pulverized coal enters the pulverized coal cyclone separator tangentially, the cathode and anode work. The high-temperature electric arc generated by the cathode and anode rotates at high speed under the action of the permanent magnet back seat, forming a high-temperature plasma field. When pulverized coal enters, it burns rapidly and releases a large amount of heat, allowing the pulverized coal to burn in the plasma combustion space. The ash produced by the pulverized coal after combustion is separated by the principle of inertia and transported to the top of the air distribution plate through the ash outlet pipe. The separated hot air enters the primary air duct through the upper hot air outlet pipe to heat the lower air chamber to 700°C.

[0054] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power, and the main controller can be a conventional known device such as a computer that can control it.

[0055] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A plasma pulverized coal burner for a circulating fluidized bed boiler, comprising a circulating fluidized bed boiler (1), characterized in that: The circulating fluidized bed boiler (1) is provided with a lower air chamber (2), and the circulating fluidized bed boiler (1) is provided with an air distribution plate (3). A side air duct is installed on one side of the lower air chamber (2), and a pulverized coal combustion mechanism is provided on one side of the circulating fluidized bed boiler (1). The pulverized coal combustion mechanism includes a pulverized coal cyclone separator (5), a cathode (7) is provided on the outer side of the pulverized coal cyclone separator (5), a permanent magnet back seat (10) is installed on the surface of the pulverized coal cyclone separator (5), an anode (8) is provided on the inner wall of the pulverized coal cyclone separator (5), the lower end of the anode (8) is the torch outlet, an insulating connector (16) is provided between the anode (8) and the permanent magnet back seat (10), and a plasma combustion space (9) is provided between the cathode (7) and the anode (8). A pulverized coal inlet pipe (14) is provided on one side of the pulverized coal cyclone separator (5) so that the pulverized coal mixture airflow enters the pulverized coal cyclone separator (5) tangentially. The hot air outlet pipe (13) passes through the middle of the permanent magnet rear seat (10). The other end of the hot air outlet pipe (13) is connected to the primary air pipe (4). The lower end of the cathode (7) is connected to the ash outlet pipe (15) through an insulating part. The ash outlet pipe (15) is connected to the circulating fluidized bed boiler (1). A cooling section is provided in the anode (8). An auxiliary mechanism (6) is provided on the surface of the pulverized coal inlet pipe (14). The auxiliary mechanism (6) includes a crushing component, a beating component (65) and a driving component (64). The driving component (64) is used to drive the crushing component and the beating component (65).

2. The plasma pulverized coal burner for a circulating fluidized bed according to claim 1, characterized in that: The cooling section includes a cooling water inlet pipe (11) and a cooling water outlet pipe (12), both of which are located in the inner wall of the anode (8).

3. The plasma pulverized coal burner for a circulating fluidized bed according to claim 1, characterized in that: The crushing assembly includes a rotating component (61) rotatably connected to the inner wall of the pulverized coal inlet pipe (14). The inner ring of the rotating component (61) is fixedly connected with a plurality of crushing plates (62) for impacting the pulverized coal. The inner wall of the pulverized coal inlet pipe (14) is fixedly connected with a guide cover (63).

4. A plasma pulverized coal burner for a circulating fluidized bed according to claim 3, characterized in that: The rotating component (61) includes an inner ring (611) and a plurality of balls (612), the plurality of balls (612) being rotatably connected to the inner wall of the inner ring (611).

5. A plasma pulverized coal burner for a circulating fluidized bed according to claim 3, characterized in that: The tapping assembly (65) is provided in two sets. The tapping assembly (65) includes a plurality of hollow seats (655) fixed on the surface of the pulverized coal inlet pipe (14). A rotating shaft (651) is rotatably connected to the inner wall of the hollow seat (655). A plurality of tapping parts (652) are fixedly connected to the surface of the rotating shaft (651). A fixing ring (653) is fixedly connected to the surface of the rotating shaft (651). A spring (654) is sleeved on the surface of the rotating shaft (651). The two ends of the spring (654) are fixedly connected to the fixing ring (653) and the surface of the hollow seat (655) respectively.

6. A plasma pulverized coal burner for a circulating fluidized bed according to claim 5, characterized in that: The striking component (652) is composed of a cylindrical rod and a ball fixed to one end of the cylindrical rod.

7. A plasma pulverized coal burner for a circulating fluidized bed according to claim 5, characterized in that: The drive assembly (64) includes an outer ring (641) rotatably connected to the inner wall of the pulverized coal inlet pipe (14). A gear ring (644) is fixedly connected to the surface of the outer ring (641). A gear one (642) is rotatably connected to the inner wall of the pulverized coal inlet pipe (14). The gear one (642) meshes with the gear ring (644). A drive motor (643) is mounted on the surface of the pulverized coal inlet pipe (14). The output end of the drive motor (643) is fixedly connected to the gear one (642). A transmission part one is provided between the outer ring (641) and the rotating part (61). A transmission part two is provided between the outer ring (641) and the rotating shaft (651).

8. A plasma pulverized coal burner for a circulating fluidized bed according to claim 7, characterized in that: The transmission part includes a strong magnetic ring 1 (647) fixed in the inner wall of the outer ring (641), and a strong magnetic ring 2 (648) is fixedly connected to the surface of the rotating part (61).

9. A plasma pulverized coal burner for a circulating fluidized bed according to claim 7, characterized in that: The transmission part two includes a residual tooth ring (645) fixed on the surface of the outer ring (641), and a gear two (646) is fixedly connected to the surface of the rotating shaft (651).

10. A process based on a circulating fluidized bed plasma pulverized coal burner as described in any one of claims 1-9, characterized in that, Includes the following steps: S1: First, the coal powder mixture airflow is introduced into the coal powder inlet pipe (14). The guide cover (63) can guide the coal powder to the crushing plate (62). The coal powder that is clumped can collide with the crushing plate (62) to achieve crushing. At the same time, the drive component (64) can control the rotating part (61) and the crushing plate (62) to rotate, thereby improving the crushing effect. The drive component (64) can also control the operation of the beater component (65) to beat the pipe and shake off the coal powder, which then enters the coal powder cyclone separator (5) tangentially with the airflow. S2: After the coal powder enters the coal powder cyclone separator (5), the plasma combustion space formed by the cathode (7) and anode (8) can make the coal powder burn in this space. The high-temperature electric arc generated by the cathode (7) and anode (8) will rotate at high speed under the action of the permanent magnet back seat (10) to form a high-temperature plasma field. When coal powder enters, it will burn rapidly and release a large amount of heat. The cooling water inlet pipe (11) and cooling water outlet pipe (12) in the anode (8) can dissipate heat from the anode (8). S3: The ash produced by the pulverized coal after combustion is separated by the principle of inertia and transported to the top of the fluidized bed air distribution plate (3) through the ash outlet pipe (15). The separated hot air turns to the upper hot air outlet pipe (13) and enters the primary air pipe (4) to heat the lower air chamber (2) to 700°C.

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