Bottom material filling equipment for circulating fluidized bed boiler

Abstract

The invention provides backing material filling equipment for a circulating fluidized bed boiler, and mainly relates to the technical field of boiler filling. A circulating fluidized bed boiler bottom material filling device comprises a circulating filler conveying shell and a fluidized bed boiler. The circulating filler conveying device has the beneficial effects that the circulating filler conveying device comprises the circulating filler conveying shell and the fluidized bed boiler, through openings are formed in the two sides of the boiler and connected with the conveying shell, baffles are arranged on the through openings, circulating rotating supporting annular plates are arranged on the two sides of the baffles, circulating moving filler plates connected end to end are arranged on the peripheries of the annular plates, and the circulating moving filler plates are driven by a motor to rotate circularly; bed material crushing, storing and circulating filling are achieved, large-particle bed materials can be screened and re-crushed, synchronous sweeping and deslagging are achieved, returned materials of the cyclone separator are evenly fed into the furnace through the conveying shell, and the combustion efficiency and the equipment stability are improved.

Description

Technical Field

[0001] This invention mainly relates to the field of boiler filling technology, specifically a circulating fluidized bed boiler bottom material filling device. Background Technology

[0002] Circulating fluidized bed (CFB) boilers are highly efficient combustion devices. They achieve efficient combustion by mixing fuel and feedstock and fluidizing them under the influence of airflow. Advantages include high combustion efficiency, low pollutant emissions, high flexibility, and easy ash and slag handling. They are widely used in industries such as power generation, chemical engineering, and papermaking. Before use, feedstock must be injected into the furnace to establish a stable initial combustion environment and ensure smooth start-up and operation. Existing CFB boilers generally suffer from the following problems: 1. Existing circulating fluidized bed boilers typically employ a filling system where a screw conveyor is fixedly connected to one side of the boiler body. In this configuration, the screw conveyor's outlet always faces a specific side of the furnace, and the furnace lacks auxiliary flow-guiding structures to ensure uniform diffusion of the filling material. This results in the filling material accumulating in a fixed direction during transport. Specifically, the filling material conveyed by the screw conveyor continuously accumulates towards the side of the furnace closest to the conveyor, while the side furthest from the conveyor remains lower due to a lack of effective material replenishment and diffusion, creating a significant height difference in the filling material within the furnace. This height difference directly disrupts the combustion environment: the thicker filling layer on the near side is prone to incomplete combustion due to impeded heat transfer, while the thinner layer on the far side may experience overheating due to localized high temperatures. Both factors contribute to uneven temperature distribution within the furnace, significantly reducing fuel combustion efficiency. Furthermore, this can cause uneven wear on the boiler's internal heating surfaces, impacting equipment lifespan. 2. During the continuous operation of a circulating fluidized bed boiler, the bottom ash continuously generates ash and slag waste through combustion. If this ash and slag is not discharged from the furnace in time, it will gradually accumulate at the bottom of the furnace, in the air distribution plate, and in the discharge channel. Ash and slag accumulation not only occupies the effective combustion space inside the furnace but also hinders the normal flow and mixing of bottom ash particles, resulting in insufficient contact between oxygen and fuel in the combustion zone, directly affecting the boiler's internal combustion efficiency. However, the existing boiler's feeding structure and bottom ash discharge structure mostly adopt independent operating mechanisms, lacking coordinated control logic between them. When feeding bottom ash, the discharge system must be suspended to prevent bottom ash overflow; when the discharge system is started to discharge ash and slag, the feeding operation must be interrupted to prevent excessive discharge leading to insufficient bottom ash. This makes it impossible to achieve synchronous operation of bottom ash feeding and ash and slag discharge while maintaining normal boiler combustion. This separate operation mode causes the total amount of bottom material inside the boiler to increase continuously over time. Excessive bottom material and accumulated ash and slag overlap, further aggravating the negative impact on airflow, temperature distribution and combustion reaction in the furnace. Long-term operation can easily lead to a decrease in boiler output and increase the probability of equipment failure. 3. In existing circulating fluidized bed boiler combustion bottom material recovery systems, incompletely burned bottom material particles separated by a cyclone separator are typically returned to the boiler furnace via a direct return pipeline for secondary combustion. However, this direct return design has significant drawbacks: Firstly, after being separated by the cyclone separator, the bottom material carries a certain velocity of airflow into the furnace during the return process. This additional airflow lacks effective buffering and guiding devices, and its direct entry into the furnace disrupts the original airflow circulation balance—potentially causing abnormally high rising airflow velocity in localized areas or interfering with the uniform air distribution effect of the air distribution plate, thereby disrupting the airflow distribution ratio in the combustion zone, causing an imbalance in the fuel-oxygen mixture, and affecting combustion stability. Secondly, during the return process, bottom material particles are prone to deposition at the return pipeline outlet or in specific areas inside the furnace due to their own gravity and sudden changes in airflow velocity, resulting in bottom material accumulation. These accumulated bottom materials will not only block the return material channel and hinder the normal delivery of subsequent bottom materials, but will also further encroach on the effective combustion space in the furnace, interfere with the overall flow and mixing effect of the bottom materials, and ultimately have an adverse effect on the boiler's combustion efficiency and long-term operational stability. Summary of the Invention

[0003] The purpose of this invention is to provide a circulating fluidized bed boiler bottom material filling device to solve the problems mentioned in the background art.

[0004] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A circulating fluidized bed boiler bottom material filling device includes a circulating filler conveying shell and a fluidized bed boiler. The fluidized bed boiler has openings on both sides of its lower part. The circulating filler conveying shell is fixedly installed on both sides of the fluidized bed boiler and communicates with the openings. A baffle is fixedly installed in the middle of the openings on both sides. Circulating rotating support ring plates are fixedly installed on the upper and lower sides of the baffles on both sides. Rotating shaft rod sleeves are provided inside both sides of the circulating rotating support ring plates. Several support columns are fixedly installed circumferentially around the rotating shaft rod sleeves and are fixedly connected to the inside of the circulating rotating support ring plates. A rotating shaft tube is provided inside the rotating shaft rod sleeve and rotatably connected thereto. A screw support column is provided inside one side of the rotating shaft tube. A screw support disc is fixedly installed on the outside of the screw support column and is fixedly connected to the circulating filler conveying shell. Circulating track bars are fixedly installed on both sides of the circulating rotating support ring plates. Several circulating movable filler plates are provided on the outer periphery of the circulating rotating support ring plates. Rotating shaft columns are provided on both sides of the circulating movable filler plates and rotatably connected to them and installed inside the circulating track bars. Each of the circulating movable filler plates is connected end-to-end and rotates in coordination. In a preferred embodiment of the present invention, a pushing groove is provided at the front of the circulating moving packing plate, and several raw material screening holes are provided on the upper part of the internal portion of the circulating rotating support ring plate inside the fluidized bed boiler. Rotating pushing plate rod seats are fixedly provided on both sides of the rear of the circulating moving packing plate, and a rotating pushing plate rod is fixedly provided between the two rotating pushing plate rod seats. A rotating pushing plate is sleeved on the outer periphery of the rotating pushing plate rod, and several metal brushes are fixedly provided on the upper part of the rotating pushing plate. A spring rotating shaft seat is fixedly provided on the outer side of one rotating pushing plate rod seat, and a spring rotating block is sleeved on the outer periphery of the spring rotating shaft seat. The inner sides of the spring rotating block are fixedly provided with clamping columns and fixedly connected to the two sides of the rotating push plate. The two sides of the circulating moving packing plate are fixedly provided with rotating push columns. The two sides of the rotating shaft tube are fixedly provided with rotating disks coaxially. The outer circumference of the rotating disk is fixedly provided with several rotating push rods. The rotating push rods can abut against the rotating push columns at corresponding positions. The outer side of the circulating packing transmission shell is fixedly provided with a motor support plate. The upper side of the motor support plate is fixedly provided with a rotating motor. The output end of the rotating motor passes through the circulating packing transmission shell and is fixedly connected to the rotating shaft tube coaxially.

[0005] As a preferred embodiment of the present invention, a pulverizer shell is provided on one side of the fluidized bed boiler. A feed inlet is fixedly provided on the upper part of the pulverizer shell. Pulverizing shafts are provided on both sides inside the pulverizer shell. Pulverizing shaft motors are provided on both sides at the rear of the pulverizer shell. The output end of the pulverizing shaft motor passes through the pulverizer shell and is coaxially fixedly connected to the pulverizing shaft. A discharge port is opened on one side of the lower part of the pulverizer shell. A spiral conveying pipe is fixedly provided on the outside of the discharge port.

[0006] As a preferred embodiment of the present invention, a raw material storage tank is provided on one side of the crusher shell. The raw material storage tank is fixedly connected and communicates with the first spiral conveying pipe. A second spiral conveying pipe is fixedly provided at the lower part of the raw material storage tank. A feeding pipe is fixedly provided at the lower side of the upper end of the second spiral conveying pipe and communicates with the upper part of the circulating packing conveying shell on one side.

[0007] As a preferred embodiment of the present invention, a material gathering trough 1 is fixedly provided at the bottom of the circulating packing conveyor housing on one side connected to the feed pipe. A spiral conveying pipe 3 is fixedly connected to the bottom of the material gathering trough 1. The spiral conveying pipe 3 is fixedly connected to and communicates with one side of the raw material storage tank. A material gathering trough 2 is fixedly provided at the bottom of the circulating packing conveyor housing on the other side. A spiral conveying pipe 4 is fixedly connected to the bottom of the material gathering trough 2. The spiral conveying pipe 4 is fixedly connected to and communicates with one side of the upper part of the crusher housing.

[0008] As a preferred embodiment of the present invention, a cyclone separator is fixedly connected to one side of the upper part of the fluidized bed boiler, a material conveyor is fixedly connected to the lower part of the cyclone separator, and a separation material transmission pipe is fixedly connected to the bottom of the material conveyor and the upper part of the circulating packing transmission shell is fixedly connected to the connecting feed pipe.

[0009] As a preferred embodiment of the present invention, a slag outlet is provided at the bottom of the circulating packing conveying shell on the side connected to the feed pipe. An opening and closing plate is provided on one side of the slag outlet and is rotatably connected thereto. A rotating telescopic cylinder is provided on one side of the circulating packing conveying shell, and the telescopic end of the rotating telescopic cylinder is rotatably connected to one side of the opening and closing plate.

[0010] Compared with the prior art, the beneficial effects of the present invention are: 1. To address the issue of one-sided accumulation of bottom material, a circulating conveyor belt is installed to provide a path for adding bottom material inside the boiler. Combined with a material distribution perforated plate, the raw material is pushed evenly down the perforated plate by the conveyor belt, achieving uniform feeding and preventing one-sided accumulation of bottom material. This optimizes the floating combustion effect inside the fluidized bed and reduces bottom ash accumulation. Simultaneously, the screening function of the material distribution holes separates excessively large bottom material particles, which are then removed from the boiler by the circulating conveyor belt and sent to the crushing structure for processing via a spiral conveyor pipe. The processed bottom material is then returned to the boiler to participate in the combustion cycle, solving the problem of large bottom material particles affecting combustion. 2. To address the issue of bottom ash accumulation caused by the separation of feeding and ash discharge, a synchronously rotating cleaning structure is installed on the upper part of the circulating conveyor belt. When the conveyor belt passes the bottom of the boiler, the cleaning structure simultaneously cleans the bottom ash out of the furnace, achieving simultaneous feeding and bottom ash discharge. This ensures that the boiler is always in the optimal combustion state and avoids bottom ash accumulation. In addition, by selecting different discharge ports, unburned ash can be guided back to the raw material silo for recirculation and combustion, or fully burned bottom ash can be directly discharged, balancing fuel utilization and ash discharge requirements. 3. To address the issue of cyclone separator return material affecting airflow balance, the cyclone separator discharge port is connected to the feeding direction of the circulating conveyor belt. This allows the bottom material separated by the separator to be evenly transported into the boiler through the circulating conveyor belt, preventing the airflow in the cyclone separator from directly entering the boiler. This effectively maintains the airflow balance inside the boiler and prevents return material accumulation from hindering combustion. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the present invention; Figure 4 This is a partial structural schematic diagram of the present invention; Figure 5 This is a cross-sectional view of the outer casing of the circulating packing conveyor of the present invention; Figure 6 This is a schematic cross-sectional view of the fluidized bed boiler of the present invention; Figure 7 This is a schematic diagram of the fluidized bed boiler structure of the present invention; Figure 8 This is a schematic diagram of the circulating moving packing plate structure of the present invention; Figure 9 This is a schematic diagram of the circulating moving packing plate structure of the present invention; Figure 10 This is a schematic diagram of the circulating packing conveyor shell structure of the present invention; Figure 11 This is a schematic diagram of the circulating packing conveyor shell structure of the present invention; Figure 12 This is a schematic diagram of the outer shell structure of the crusher of the present invention.

[0012] The following are the labels in the attached diagram: 1. Circulating packing conveyor shell; 2. Fluidized bed boiler; 3. Port; 4. Baffle; 5. Circulating rotating support ring plate; 6. Rotating shaft sleeve column; 7. Support column; 8. Rotating shaft tube; 9. Screw support column; 10. Screw support disc; 11. Circulating track bar; 12. Circulating moving packing plate; 13. Rotating shaft column; 14. Pusher chute; 15. Raw material screening hole; 16. Rotating pusher plate rod seat; 17. Rotating pusher plate rod; 18. Rotating pusher plate; 19. Metal brush; 20. Spring rotating shaft seat; 21. Spring rotating block; 22. Clamping plate column; 23. Rotating pusher column 24. Rotating disc; 25. Rotating push rod; 26. Motor support plate; 27. Rotating motor; 28. Crusher housing; 29. ​​Feed inlet; 30. Crusher shaft; 31. Crusher shaft motor; 32. Discharge outlet; 33. Spiral conveyor pipe one; 34. Raw material storage tank; 35. Spiral conveyor pipe two; 36. Connecting feed pipe; 37. Gathering trough one; 38. Spiral conveyor pipe three; 39. Gathering trough two; 40. Spiral conveyor pipe four; 41. Cyclone separator; 42. Feeder; 43. Separated material conveying pipe; 44. Slag discharge outlet; 45. Opening and closing plate; 46. Rotating telescopic cylinder. Detailed Implementation

[0013] The present invention will be further described in conjunction with the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0014] Example: A circulating fluidized bed boiler bottom material filling device like Figure 1-12 As shown, a circulating fluidized bed boiler bottom material filling device has the following specific structure: A circulating fluidized bed boiler bottom filling device includes a circulating filler conveying shell 1 and a fluidized bed boiler 2. The device is characterized in that: the fluidized bed boiler 2 has openings 3 on both sides of its lower part; the circulating filler conveying shell 1 is fixedly installed on both sides of the fluidized bed boiler 2 and communicates with the openings 3; baffles 4 are fixedly installed in the middle of the openings 3 on both sides to block the openings 3 and prevent flame transmission to the interior of the circulating filler conveying shell 1 on both sides; circulating rotating support ring plates 5 are fixedly installed on the upper and lower sides of the baffles 4 on both sides; rotating shaft sleeves 6 are provided inside the rotating shaft sleeves 5 on both sides; several support columns 7 are fixedly installed on the outer circumference of the rotating shaft sleeves 6 and are fixedly connected to the interior of the circulating rotating support ring plates 5; rotating shaft tubes 8 are provided inside the rotating shaft sleeves 6 and rotatably connected to them; the rotating shaft tubes 8... The inner side is provided with a screw support column 9, and a screw support disk 10 is fixedly provided on the outer side of the screw support column 9 and is fixedly connected to the circulating packing transmission shell 1. The screw support disk 10 and the screw support column 9 support and fix the rotating shaft tube 8 and the rotating shaft sleeve column 6. Circulating track bars 11 are fixedly provided on both sides of the circulating rotating support ring plate 5. A plurality of circulating moving packing plates 12 are provided on the outer periphery of the circulating rotating support ring plate 5. The circulating moving packing plates 12 are provided on both sides with rotating shaft columns 13, which are rotatably connected to them and installed inside the circulating track bars 11. The rotating shaft columns 13 install each of the circulating rotating support ring plates 5 inside the circulating track bars 11 on both sides and allow them to move inside. The circulating moving packing plates 12 are connected end to end and rotate in cooperation. The circulating moving packing plate 12 has a pushing groove 14 at its front, which pushes the bottom material to move. The circulating rotating support ring plate 5 has several raw material screening holes 15 on its upper part inside the fluidized bed boiler 2. The raw material is evenly transferred to the inside of the fluidized bed boiler 2 through the raw material screening holes 15 in conjunction with the pushing groove 14. The raw material is screened by the size of the raw material screening holes 15, and the bottom material with excessively large particles is further pushed to the outside of the fluidized bed boiler 2 by the circulating moving packing plate 12. Rotary pusher plate holders 16 are fixedly provided on both sides of the rear of plate 12. A rotating pusher plate rod 17 is fixedly provided between the two rotating pusher plate holders 16. A rotating pusher plate 18 is sleeved on the outer periphery of the rotating pusher plate rod 17. Several metal brushes 19 are fixedly provided on the upper part of the rotating pusher plate 18. A spring shaft seat 20 is fixedly provided on the outer side of one of the rotating pusher plate holders 16. A spring rotating block 21 is sleeved on the outer periphery of the spring shaft seat 20. Clamping posts 22 are fixedly provided on both sides of the inner side of the spring rotating block 21 and are fixedly connected to both sides of the rotating pusher plate 18. The spring rotating block 21 cooperates with the spring rotating shaft seat 20 to keep the rotating push plate 18 upright, and further allows the rotating push plate 18 to rotate to a certain extent during cleaning to prevent jamming. Rotating push columns 23 are fixedly provided on both sides of the circulating moving packing plate 12, and rotating disks 24 are coaxially fixed on both sides of the rotating shaft tube 8. Several rotating push rods 25 are fixedly provided circumferentially on the outer periphery of the rotating disk 24. The rotating push rods 25 can abut against the rotating push columns 23 at corresponding positions. The circulating packing... A motor support plate 26 is fixedly provided on the outside of the transmission housing 1. A rotating motor 27 is fixedly provided on the upper side of the motor support plate 26. The output end of the rotating motor 27 passes through the circulating packing transmission housing 1 and is fixedly connected to the rotating shaft tube 8 on the same axis. The rotating motor 27 drives the rotating shaft tube 8 to rotate, which in turn drives the rotating push rod 25 to push the rotating push column 23 to move. Furthermore, the circulating moving packing plates 12 are connected end to end, so that the circulating moving packing plates 12 circulate around the circulating rotating support ring plate 5.

[0015] The fluidized bed boiler 2 is provided with a pulverizer shell 28 on one side. The upper part of the pulverizer shell 28 is fixedly provided with a feed inlet 29, through which the raw material is introduced into the pulverizer shell 28. The pulverizer shell 28 is provided with pulverizing shafts 30 on both sides inside. The pulverizer shell 28 is provided with pulverizing shaft motors 31 on both sides at the rear. The output end of the pulverizing shaft motor 31 passes through the pulverizer shell 28 and is fixedly connected to the pulverizing shaft 30 coaxially. The pulverizing shaft motor 31 drives the pulverizing shaft 30 to rotate, pulverizing the raw material entering the pulverizer shell 28. The pulverizer shell 28 is provided with a discharge port 32 on one side at the lower part for discharging the pulverized raw material. A spiral conveyor pipe 33 is fixedly provided on the outside of the discharge port 32.

[0016] A raw material storage tank 34 is provided on one side of the crusher shell 28. The raw material storage tank 34 is fixedly connected to and communicates with the spiral conveyor pipe 33. The crushed raw material discharged from the crusher shell 28 is transferred to the raw material storage tank 34 through the spiral conveyor pipe 33. A spiral conveyor pipe 35 is fixedly provided at the lower part of the raw material storage tank 34. A feed pipe 36 is fixedly provided on the lower side of the upper end of the spiral conveyor pipe 35, which communicates with the upper part of the circulating packing conveyor shell 1 on one side. The raw material inside the raw material storage tank 34 is transferred to the upper part of the circulating packing conveyor shell 1 on the feed side through the spiral conveyor pipe 35, and the raw material is further pushed and filled into the fluidized bed boiler 2 by the circulating moving packing plate 12.

[0017] A material-gathering trough 37 is fixedly installed at the bottom of the circulating packing conveyor shell 1 on one side connected to the feed pipe 36. A spiral conveyor pipe 38 is fixedly connected to the bottom of the material-gathering trough 37. The spiral conveyor pipe 38 is fixedly connected to one side of the raw material storage tank 34. The unburned bottom ash from the fluidized bed boiler 2 is pushed into the material-gathering trough 37 by the metal brushes 19 and then transferred back to the raw material storage tank 34 by the spiral conveyor pipe 38 for recirculation. The bottom of the circulating packing conveyor shell 1 on the other side is fixedly connected to the feed pipe 36. A material gathering trough 39 is fixedly provided, and a spiral conveying pipe 40 is fixedly connected to the bottom of the material gathering trough 39. The spiral conveying pipe 40 is fixedly connected to and communicates with the upper side of the crusher shell 28. The bottom material with larger particles that are not suitable for combustion is screened out through the raw material screening hole 15 and then pushed into the material gathering trough 39 through the circulating moving packing plate 12. It is further transferred to the crusher shell 28 through the spiral conveying pipe 40 for re-crushing and then further transferred to the raw material storage tank 34 for further circulating packing.

[0018] A cyclone separator 41 is fixedly connected to one side of the upper part of the fluidized bed boiler 2. The cyclone separator 41 separates the flue gas generated by combustion and the unburned bottom material, and discharges the unburned bottom material from the bottom outlet. A feeder 42 is fixedly connected to the lower part of the cyclone separator 41. A separation material transmission pipe 43 is fixedly connected to the bottom of the feeder 42 and is fixedly connected to the upper part of the circulating packing transmission shell 1 on the same side as the feed pipe 36. The unburned bottom material enters the feeder 42 and is transmitted through the separation material transmission pipe 43 to the inside of the circulating packing transmission shell 1 on the feed side. It is then pushed by the circulating moving packing plate 12 to be refilled into the fluidized bed boiler 2.

[0019] A slag outlet 44 is provided at the bottom of the circulating packing conveyor shell 1 connected to the feed pipe 36. An opening and closing plate 45 is provided on one side of the slag outlet 44 and is rotatably connected to it. A rotating telescopic cylinder 46 is provided on one side of the circulating packing conveyor shell 1. The telescopic end of the rotating telescopic cylinder 46 is rotatably connected to one side of the opening and closing plate 45. By extending and retracting the rotating telescopic cylinder 46, the opening and closing plate 45 is driven to open and close, thereby opening and closing the bottom of the circulating packing conveyor shell 1. The completely burned bottom ash swept out by the metal brush 19 can be discharged from the slag outlet 44 for collection.

[0020] This solution also includes a controller, the location of which is set by the operator according to the actual situation during operation. The controller is used to control the electrical components used in this solution, including but not limited to sensors, motors, telescopic rods, water pumps, solenoid valves, heating wires, heat pumps, displays, computer input devices, switches, communication devices, lights, speakers, and microphones. The controller is an Intel processor, AMD processor, PLC controller, ARM processor, or microcontroller. It is used in conjunction with a motherboard, memory modules, storage media, and power supply, which is AC power or a lithium battery. When a display screen is provided, a graphics card is also included. For the operating principle of the controller, please refer to "Principles of Automatic Control," "Microcontroller Principles and Application Simulation Cases," and "Sensor Principles and Applications" published by Tsinghua University Press. Other books in this field can also be consulted. Other automation control and electrical components not mentioned are knowledge well known to those skilled in the art and will not be described in detail here.

[0021] Working principle: When bottom material needs to be injected into the fluidized bed boiler 2, the uncrushed raw bottom material is first injected into the feed inlet 29 and crushed by the crushing shaft 30. The crushed material is then moved through the spiral conveyor pipe 33 and injected into the raw material storage tank 34 to complete raw material storage. After storage to a certain capacity, the raw material in the storage tank 34 is transported to the circulating packing conveyor shell 1 at the feed end through the spiral conveyor pipe 35. Simultaneously, the rotating motor 27 drives the rotating shaft pipe 8 to rotate, further driving the rotating push rod 25 to push the rotating push column 23 to move. Further, through each of the circulating movements... The packing plates 12 are connected end to end, causing each of the circulating moving packing plates 12 to rotate around the circulating rotating support ring plate 5, thereby pushing the crushed raw material into the upper part of the circulating rotating support ring plate 5, and further pushing the raw material into the fluidized bed boiler 2. The pusher chute 14 cooperates with the raw material screening hole 15 to allow the raw material to float into the combustion section of the fluidized bed boiler 2 for combustion. The circulating rotating support ring plate 5 circulates and automatically adds the combustion base material, ensuring that the raw material always falls evenly into the fluidized bed boiler 2, preventing the problem of uneven combustion caused by the large accumulation of raw material on one side.

[0022] When the particle size of the bottom material is uneven and cannot fully meet the combustion requirements, the bottom material with excessively large particles that do not meet the combustion requirements is screened out by the pusher trough 14 and the raw material screening hole 15. The bottom material is then pushed out of the fluidized bed boiler 2 by the circulating rotating support ring plate 5 and into the circulating packing conveyor shell 1 on the discharge side. It is further pushed into the material gathering tank 39 and then the spiral conveyor pipe 40 transfers the excessively large bottom material back to the crusher shell 28 for re-crushing and filling into the raw material storage tank 34 for bottom material filling again. Through automated screening and re-crushing, non-compliant raw materials are automatically discharged and automatically recycled, avoiding raw material waste. At the same time, the material can be automatically recycled and reused during the operation of the device.

[0023] During the combustion process inside the fluidized bed boiler 2, due to the different settling velocities of the raw materials and the possibility of incomplete combustion material settling at the bottom due to insufficient furnace temperature in the initial combustion stage, incomplete combustion material accumulates and then accumulates together with the fully combusted material, resulting in material waste. Therefore, in the initial stage of combustion, the circulating rotating support ring plate 5 can drive the metal brush 19 to enter the bottom of the fluidized bed boiler 2 for circulating cleaning. The incomplete combustion material that has settled into the bottom of the fluidized bed boiler 2 is swept into the inside of the circulating packing conveyor shell 1 at the feed end and further enters the material collection tank 37 for collection. Subsequently, the collected incomplete combustion material can be transferred to the raw material storage tank 34 through the spiral conveyor pipe 38 for refilling and cyclic feeding. By lengthening the spiral conveyor pipe 38 and integrating a cooling structure, the incomplete combustion material can be cooled and extinguished during the transfer process to prevent it from mixing with the material and reigniting.

[0024] As the internal temperature of the fluidized bed boiler 2 increases during the combustion process, the bottom material inside can be almost completely burned to form bottom ash. To avoid excessive accumulation of bottom ash affecting the internal combustion of the fluidized bed boiler 2, during the operation of the device, the rotating telescopic cylinder 46 extends to drive the opening and closing plate 45 to flip and open the slag discharge port 44. The metal brush 19 sweeps the bottom ash inside the fluidized bed boiler 2 out of the slag discharge port 44, realizing bottom ash cleaning while combustion is being added. This reduces the impact of bottom ash accumulation on the internal combustion of the boiler, and enables bottom ash cleaning during boiler operation, allowing the boiler to operate at high load for a long time without stopping for cleaning, thus improving operating efficiency.

[0025] The automated operation of each part enables automated packing, large particle raw material recovery, incomplete combustion material recovery, and bottom ash removal during operation.

[0026] In explaining this invention, it should be noted that the terms indicating location are used only for ease of description and understanding, and are not intended to limit the installation location of specific technical features. Other possible installation methods are not excluded.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A circulating fluidized bed boiler bottom filling device, comprising a circulating filler conveying shell (1) and a fluidized bed boiler (2), characterized in that: The fluidized bed boiler (2) has openings (3) on both sides of its lower part. The circulating packing conveyor shell (1) is fixedly installed on both sides of the fluidized bed boiler (2) and communicates with the openings (3). Baffles (4) are fixedly installed in the middle of the openings (3) on both sides. Circulating rotating support ring plates (5) are fixedly installed on the upper and lower sides of the baffles (4). Rotating shaft sleeves (6) are provided inside both sides of the circulating rotating support ring plates (5). Several support columns (7) are fixedly installed on the outer circumference of the rotating shaft sleeves (6) and are fixedly connected to the inside of the circulating rotating support ring plates (5). Rotating shaft tubes (8) are provided inside the rotating shaft sleeves (6). Rotary connection with it, a screw support column (9) is provided inside one side of the rotating shaft tube (8), a screw support disk (10) is fixedly provided on the outside of the screw support column (9) and fixedly connected to the circulating packing transmission shell (1), a circulating track bar (11) is fixedly provided on both sides of the circulating rotating support ring plate (5), a number of circulating moving packing plates (12) are provided on the outer periphery of the circulating rotating support ring plate (5), a rotating shaft column (13) is provided on both sides of the circulating moving packing plate (12) and rotatedly connected to it and installed inside the circulating track bar (11), and each of the circulating moving packing plates (12) is connected end to end and rotated.

2. The circulating fluidized bed boiler bottom material filling equipment according to claim 1, characterized in that: The circulating moving packing plate (12) has a pusher groove (14) at the front. The circulating rotating support ring plate (5) has several raw material screening holes (15) at the upper part of the internal part of the fluidized bed boiler (2). Rotating pusher plate rod seats (16) are fixed on both sides of the rear of the circulating moving packing plate (12). Rotating pusher plate rods (17) are fixed between the rotating pusher plate rod seats (16) on both sides. Rotating pusher plate rods (18) are sleeved on the outer periphery of the rotating pusher plate rods (17). Several metal brushes (19) are fixed on the upper part of the rotating pusher plate (18). A spring rotating shaft seat (20) is fixed on the outer side of one side of the rotating pusher plate rod seat (16). A spring rotating block (21) is sleeved on the outer periphery of the spring rotating shaft seat (20). The spring rotates... The inner sides of the block (21) are fixedly provided with clamping columns (22) and fixedly connected to the two sides of the rotating pusher plate (18). The two sides of the circulating moving packing plate (12) are fixedly provided with rotating push columns (23). The two sides of the rotating shaft tube (8) are fixedly provided with rotating disks (24) on the same axis. The outer circumference of the rotating disk (24) is fixedly provided with several rotating push rods (25). The rotating push rods (25) can be engaged with the rotating push column (23) at the corresponding position. The outer side of the circulating packing transmission shell (1) is fixedly provided with a motor support plate (26). The upper side of the motor support plate (26) is fixedly provided with a rotating motor (27). The output end of the rotating motor (27) passes through the circulating packing transmission shell (1) and is fixedly connected to the rotating shaft tube (8) on the same axis.

3. The circulating fluidized bed boiler bottom material filling equipment according to claim 2, characterized in that: The fluidized bed boiler (2) is provided with a pulverizer shell (28) on one side. The upper part of the pulverizer shell (28) is fixedly provided with a feed inlet (29). The pulverizer shell (28) is provided with pulverizing shafts (30) on both sides inside. The pulverizer shell (28) is provided with pulverizing shaft motors (31) on both sides at the rear. The output end of the pulverizing shaft motor (31) passes through the pulverizer shell (28) and is fixedly connected to the pulverizing shaft (30) on the same axis. The pulverizer shell (28) is provided with a discharge port (32) on one side at the lower part. A spiral conveyor pipe (33) is fixedly provided on the outside of the discharge port (32).

4. The circulating fluidized bed boiler bottom material filling equipment according to claim 3, characterized in that: The crusher housing (28) has a raw material storage tank (34) on one side. The raw material storage tank (34) is fixedly connected to and communicates with the first spiral conveyor pipe (33). The second spiral conveyor pipe (35) is fixedly provided at the lower part of the raw material storage tank (34). The upper end of the second spiral conveyor pipe (35) is fixedly provided with a connecting feed pipe (36) which communicates with the upper part of the circulating packing conveyor housing (1) on one side.

5. The circulating fluidized bed boiler bottom material filling equipment according to claim 4, characterized in that: A material gathering trough (37) is fixedly provided at the bottom of the circulating packing conveyor shell (1) connected to the feed pipe (36). A spiral conveyor pipe (38) is fixedly connected at the bottom of the material gathering trough (37). The spiral conveyor pipe (38) is fixedly connected to one side of the raw material storage tank (34). A material gathering trough (39) is fixedly provided at the bottom of the circulating packing conveyor shell (1) on the other side. A spiral conveyor pipe (40) is fixedly connected at the bottom of the material gathering trough (39). The spiral conveyor pipe (40) is fixedly connected to one side of the upper part of the crusher shell (28).

6. The circulating fluidized bed boiler bottom material filling equipment according to claim 5, characterized in that: The fluidized bed boiler (2) is fixedly connected to a cyclone separator (41) on one side of its upper part. The cyclone separator (41) is fixedly connected to a feeder (42) at its lower part. The feeder (42) is fixedly connected to a separation material transmission pipe (43) at its bottom and connected to the feed pipe (36) on one side. The circulating packing transmission shell (1) is fixedly connected and connected to the upper part of the shell.

7. The circulating fluidized bed boiler bottom material filling equipment according to claim 6, characterized in that: A slag outlet (44) is provided at the bottom of the circulating packing transmission shell (1) connected to the feed pipe (36). A slag outlet (44) is provided on one side of the slag outlet (44) and is rotatably connected to it. A rotating telescopic cylinder (46) is provided on one side of the circulating packing transmission shell (1). The telescopic end of the rotating telescopic cylinder (46) is rotatably connected to one side of the rotatable plate (45).

Images