Circulating fluidized bed premixed combustion device

Abstract

The utility model relates to the technical field of circulating fluidized beds, in particular to a premixed combustion device of a circulating fluidized bed, which comprises a workbench, two supporting seats, a screening mechanism, a combustion mechanism and a cyclone separator, the two supporting seats are fixedly mounted on the workbench, the screening mechanism is fixedly mounted on one supporting seat, and the combustion mechanism is fixedly mounted on the other supporting seat. The screening mechanism is used for screening materials, the combustion mechanism is fixedly installed on the workbench and used for combusting the materials, the cyclone separator is fixedly installed on the other supporting base, the combustion mechanism comprises a combustion cylinder, a shell, a spreading mechanism and a vibration mechanism, and the combustion cylinder is fixedly installed on the workbench. According to the premixing combustion device of the circulating fluidized bed, the combustion mechanism and the vibration mechanism are arranged, the shell can be driven to vertically move in a reciprocating mode to generate the vibration effect, the situation that the air distribution effect is affected by material accumulation is avoided, meanwhile, materials can be distributed on the shell more evenly, and therefore the combustion efficiency and stability of the premixing combustion device are improved.

Description

Technical Field

[0001] This utility model relates to the field of circulating fluidized bed technology, and specifically to a circulating fluidized bed premixed combustion device. Background Technology

[0002] Circulating fluidized bed combustion (CFB) is primarily based on the principle of fluidization, which involves thoroughly mixing solid particles with gas within a specific device, causing the solid particles to exhibit a fluid-like state. During combustion, fuel particles move upwards within the furnace under the influence of the rising airflow, while some particles are carried out of the furnace by the airflow and enter the separator. In the separator, the particles are separated and returned to the furnace via a return device, forming a circulating combustion process.

[0003] The premixed combustion device of the circulating fluidized bed fully mixes the fuel and air in a dedicated premixing zone before they enter the combustion chamber. Then, after the premixed fuel and air enter the combustion chamber, the air is evenly distributed into the combustion chamber by the air distributor and air cap, so that the fuel can be fluidized evenly, thereby ensuring that the fuel can be fully combusted in the combustion chamber.

[0004] Considering that after prolonged use, existing circulating fluidized bed premixed combustion devices tend to accumulate combusted material on the air distribution plate, resulting in uneven distribution of subsequent material on the air distribution plate and easy clogging of the air caps on the air distribution plate, thus causing uneven air distribution in the combustion chamber, poor fuel fluidization, and local overburning or underburning, thereby reducing the combustion efficiency and stability of the premixed combustion device. Utility Model Content

[0005] The purpose of this invention is to provide a circulating fluidized bed premixed combustion device.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A circulating fluidized bed premixed combustion device is provided, comprising a workbench, two support bases, a screening mechanism, a combustion mechanism, and a cyclone separator. Both support bases are fixedly installed on the workbench. The screening mechanism is fixedly installed on one support base and is used to screen materials. The combustion mechanism is fixedly installed on the workbench and is used to burn materials. The cyclone separator is fixedly installed on the other support base. The combustion mechanism includes a combustion cylinder, a shell, a material spreading mechanism, and a vibration mechanism. The combustion cylinder is fixedly installed on the workbench, and the shell is slidably installed on the combustion cylinder. The material spreading mechanism is fixedly installed on the combustion cylinder and is used to evenly spread materials on the shell. The vibration mechanism is fixedly installed on the combustion cylinder and is used to drive the shell to vibrate.

[0008] Furthermore, the combustion mechanism also includes a blower, a circular plate, and an air cap. The blower is fixedly installed on the combustion cylinder, and the output end of the blower is connected to the housing through a delivery pipe. The circular plate is slidably installed on the housing, and the air cap is fixedly installed on the circular plate and penetrates through the housing. The circular plate and the combustion cylinder are connected by a cylindrical block. A sliding groove is provided on the housing, and the cylindrical block is slidably connected to the sliding groove. The vibration mechanism is fixedly installed on the housing and is used to drive the housing to move vertically.

[0009] Furthermore, the vibration mechanism includes a fixed plate, a fixed column, a protrusion, and an extrusion block. The fixed plate is fixedly installed on the combustion cylinder, the fixed column passes through the fixed plate, the fixed column and the fixed plate are connected by a spring, and the fixed column is fixedly connected to the housing. The protrusion is fixedly installed on the housing, and the extrusion block is fixedly installed on the material spreading mechanism, which is used to drive the extrusion block to rotate.

[0010] Furthermore, the material spreading mechanism includes a pusher rod, a filter plate, a rotating shaft, and a second motor. The second motor is fixedly installed on the combustion cylinder, the rotating shaft is fixedly connected to the extrusion block, and the rotating shaft is fixedly installed on the output shaft of the second motor. The rotating shaft passes through the filter plate and the housing, and the filter plate is fixedly installed on the combustion cylinder. The pusher rod is fixedly installed on the rotating shaft.

[0011] Furthermore, the screening mechanism includes a cylinder, a screening plate, a cylindrical rod, a motor, and a pressing roller. The cylinder is fixedly mounted on a support base, the screening plate is fixedly mounted on the cylinder, the motor is fixedly mounted on a support base, the cylindrical rod passes through the screening plate, and the cylindrical rod is fixedly connected to the output shaft of the motor. The pressing roller is fixedly mounted on the cylindrical rod.

[0012] Furthermore, the cylinder body and the combustion cylinder are connected by a connecting pipe, and the combustion cylinder and the cyclone separator are connected by a circular pipe.

[0013] The beneficial effects of this utility model are as follows: This circulating fluidized bed premixed combustion device, through its combustion mechanism and vibration mechanism, can drive the shell to move back and forth vertically to generate a vibration effect, thereby causing the material attached to the air cap and the surface of the shell to fall off in time, avoiding material accumulation and affecting the air distribution effect. At the same time, it can also make the material distribution on the shell more uniform, thereby improving the combustion efficiency and stability of the premixed combustion device. Furthermore, through the material spreading mechanism, the material added into the combustion cylinder can be evenly spread on the shell, thereby further improving the combustion effect. In addition, through the screening mechanism, the material added into the combustion cylinder can be screened, and the material with excessively large particles can be crushed and pulverized, further improving the uniformity of the particle size of the material added into the combustion cylinder. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the embodiments of this utility model will be briefly introduced below.

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional view of the combustion chamber structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the main structure of the shell of this utility model;

[0018] Figure 4 This is a schematic diagram of the main structure of the circular plate of this utility model;

[0019] Figure 5 This is a bottom view of the shell structure of this utility model;

[0020] Figure 6 For the present utility model Figure 2 Enlarged structural diagram of section A;

[0021] Figure 7 This is a schematic diagram of the main structure of the second motor and the rotating shaft of this utility model;

[0022] Figure 8 This is a schematic diagram of the main structure of the filter plate of this utility model;

[0023] Figure 9 This is a cross-sectional view of the cylindrical structure of this utility model.

[0024] In the diagram: 1. Workbench; 2. Support base; 3. Screening mechanism; 31. Cylinder; 32. Screening plate; 33. Cylindrical rod; 34. Motor 1; 35. Roller; 4. Combustion mechanism; 41. Combustion cylinder; 42. Fan; 43. Conveying pipe; 44. Shell; 45. Circular plate; 46. Air cap; 47. Cylindrical block; 48. Material spreading mechanism; 481. Push rod; 482. Filter plate; 483. Rotating shaft; 484. Motor 2; 49. Vibration mechanism; 491. Fixing plate; 492. Spring; 493. Fixing column; 494. Protrusion; 495. Extrusion block; 410. Slide groove; 5. Cyclone separator. Detailed Implementation

[0025] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0026] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] Reference Figure 1 The circulating fluidized bed premixed combustion device shown includes a workbench 1, two support bases 2, a screening mechanism 3, a combustion mechanism 4, and a cyclone separator 5. Both support bases 2 are fixedly installed on the workbench 1. The screening mechanism 3 is fixedly installed on one support base 2 and is used to screen materials. The screening mechanism 3 can screen materials and crush materials with excessively large particles after screening, thereby improving the uniformity of particle size of the combustion material. The combustion mechanism 4 is fixedly installed on the workbench 1 and is used to burn the materials. The combustion mechanism 4 improves the combustion efficiency and effect of the materials. The cyclone separator 5 is fixedly installed on the other support base 2. The cyclone separator 5 is existing technology and is used to separate solid particles from the combustion gas.

[0028] Reference Figure 2 The combustion mechanism 4 includes a combustion cylinder 41, a housing 44, a material spreading mechanism 48, and a vibration mechanism 49. The combustion cylinder 41 is fixedly installed on the workbench 1 and provides space for material combustion. The housing 44 is slidably installed on the combustion cylinder 41. The material spreading mechanism 48 is fixedly installed on the combustion cylinder 41 and is used to evenly spread the material on the housing 44. By setting the material spreading mechanism 48, the material can be evenly spread on the housing 44, thereby improving the combustion effect of the material. The vibration mechanism 49 is fixedly installed on the combustion cylinder 41 and is used to drive the housing 44 to vibrate. By setting the vibration mechanism 49, the material adhering to the air cap 46 and the surface of the housing 44 is promptly dislodged, avoiding material accumulation that affects the air distribution effect, and also making the material distribution on the housing 44 more uniform.

[0029] Reference Figures 2 to 4The combustion mechanism 4 also includes a blower 42, a circular plate 45, and an air cap 46. The blower 42 is fixedly installed on the combustion cylinder 41. The output end of the blower 42 is connected to the housing 44 through a conveying pipe 43. Air is delivered into the housing 44 through the blower 42 and the conveying pipe 43. The circular plate 45 is slidably installed on the housing 44. Through the sliding effect of the housing 44, the material attached to the air cap 46 can be scraped off to prevent the material from clogging the air cap 46. The air cap 46 is fixedly installed on the circular plate 45 and penetrates the housing 44. When air enters the housing... After entering the housing 44, the air will enter the wind cap 46 through the circular plate 45, thereby achieving a uniform air distribution effect. The circular plate 45 is connected to the combustion cylinder 41 through the cylindrical block 47. The cylindrical block 47 keeps the circular plate 45 fixedly installed inside the combustion cylinder 41. The housing 44 is provided with a sliding groove 410. The cylindrical block 47 is slidably connected to the sliding groove 410. The sliding groove 410 is used to avoid the cylindrical block 47, so as not to affect the sliding effect of the housing 44. The vibration mechanism 49 is fixedly installed on the housing 44. The vibration mechanism 49 is used to drive the housing 44 to move vertically.

[0030] Reference Figures 5 to 7 The vibration mechanism 49 includes a fixed plate 491, a fixed column 493, a protrusion 494, and a pressing block 495. The fixed plate 491 is fixedly installed on the combustion cylinder 41 to prevent it from falling off. The fixed column 493 passes through the fixed plate 491 and is connected to the fixed plate 491 by a spring 492. The fixed column 493 is also fixedly connected to the housing 44. The elastic force of the spring 492 ensures that the fixed column 493 is not subjected to external forces. The housing 44 is always moved downwards. The protrusion 494 is fixedly installed on the housing 44, and the extrusion block 495 is fixedly installed on the material spreading mechanism 48. The material spreading mechanism 48 is used to drive the extrusion block 495 to rotate. Through the rotation effect of the extrusion block 495, the extrusion block 495 can contact the protrusion 494, thereby extruding the protrusion 494, causing the protrusion 494 to drive the housing 44 to move upwards. When the extrusion block 495 passes the protrusion 494, the housing 44 is reset under the action of the spring 492.

[0031] Reference Figure 2 and Figure 8The material spreading mechanism 48 includes a pusher rod 481, a filter plate 482, a rotating shaft 483, and a second motor 484. The second motor 484 is fixedly installed on the combustion chamber 41. The rotating shaft 483 is fixedly connected to the extrusion block 495 and is fixedly installed on the output shaft of the second motor 484. By starting the second motor 484, the rotating shaft 483 can rotate, thereby driving the extrusion block 495 to rotate. The rotating shaft 483 passes through the filter plate 482 and the shell 44. The filter plate 482 is fixedly installed on the combustion chamber 41. Through the filter plate 482, the material entering the combustion chamber 41 falls onto the filter plate 482 and then onto the shell 44. The pusher rod 481 is fixedly installed on the rotating shaft 483. The rotation of the rotating shaft 483 drives the pusher rod 481 to rotate, thereby spreading the material on the filter plate 482 evenly to the surrounding area, so that the material can fall evenly onto the shell 44.

[0032] Reference Figure 9 The screening mechanism 3 includes a cylinder 31, a screening plate 32, a cylindrical rod 33, a motor 34, and a crushing roller 35. The cylinder 31 is fixedly installed on a support base 2 and has a feed inlet. Material is added into the cylinder 31 through the feed inlet. The screening plate 32 is fixedly installed on the cylinder 31 and screens the material added into the cylinder 31, thereby improving the uniformity of the material particles added into the combustion chamber 41. The motor 34 is fixedly installed on a support base 2. The cylindrical rod 33 passes through the screening plate 32 and is fixedly connected to the output shaft of the motor 34. By starting the motor 34, the cylindrical rod 33 can be driven to rotate. The crushing roller 35 is fixedly installed on the cylindrical rod 33. The rotation of the cylindrical rod 33 can drive the crushing roller 35 to rotate, thereby crushing and pulverizing the material with excessively large particles on the screening plate 32 to achieve the required particle size.

[0033] Reference Figure 1 The cylinder 31 and the combustion cylinder 41 are connected by a connecting pipe. The screened material in the cylinder 31 can be transported to the combustion cylinder 41 through the connecting pipe. The combustion cylinder 41 and the cyclone separator 5 are connected by a circular pipe. The gas from the combustion in the combustion cylinder 41 is transported to the cyclone separator 5 through the circular pipe for separation.

[0034] This circulating fluidized bed premixed combustion device, through its combustion and vibration mechanisms, drives the shell to move vertically back and forth, generating a vibration effect. This allows materials adhering to the air cap and shell surface to fall off in a timely manner, preventing material accumulation from affecting the air distribution effect. It also makes the material distribution on the shell more uniform, thereby improving the combustion efficiency and stability of the premixed combustion device. Furthermore, the material spreading mechanism can evenly spread the material added into the combustion chamber onto the shell, further improving the combustion effect. In addition, the screening mechanism can screen the material added into the combustion chamber and crush excessively large particles, further improving the uniformity of particle size of the material added into the combustion chamber.

[0035] It should be stated that the above-described specific embodiments are merely preferred embodiments of this utility model and the technical principles employed. Those skilled in the art should understand that various modifications, equivalent substitutions, and variations can be made to this utility model. However, such variations, as long as they do not depart from the spirit of this utility model, should be within the protection scope of this utility model. Furthermore, some terminology used in this application specification and claims is not limiting, but merely for ease of description.

Claims

1. A circulating fluidized bed premixed combustion device, characterized in that, The system includes a workbench (1), two support bases (2), a screening mechanism (3), a combustion mechanism (4), and a cyclone separator (5). Both support bases (2) are fixedly mounted on the workbench (1). The screening mechanism (3) is fixedly mounted on one support base (2) and is used to screen materials. The combustion mechanism (4) is fixedly mounted on the workbench (1) and is used to burn materials. The cyclone separator (5) is fixedly mounted on the other support base (2). 4) Includes a combustion cylinder (41), a shell (44), a material spreading mechanism (48), and a vibration mechanism (49). The combustion cylinder (41) is fixedly installed on the workbench (1). The shell (44) is slidably installed on the combustion cylinder (41). The material spreading mechanism (48) is fixedly installed on the combustion cylinder (41) and is used to spread the material evenly on the shell (44). The vibration mechanism (49) is fixedly installed on the combustion cylinder (41) and is used to drive the shell (44) to vibrate.

2. The circulating fluidized bed premixed combustion device according to claim 1, characterized in that, The combustion mechanism (4) also includes a blower (42), a circular plate (45), and a wind cap (46). The blower (42) is fixedly installed on the combustion cylinder (41). The output end of the blower (42) is connected to the housing (44) through a conveying pipe (43). The circular plate (45) is slidably installed on the housing (44). The wind cap (46) is fixedly installed on the circular plate (45) and penetrates the housing (44). The circular plate (45) is connected to the combustion cylinder (41) through a cylindrical block (47). A sliding groove (410) is provided on the housing (44). The cylindrical block (47) is slidably connected to the sliding groove (410). The vibration mechanism (49) is fixedly installed on the housing (44). The vibration mechanism (49) is used to drive the housing (44) to move vertically.

3. The circulating fluidized bed premixed combustion device according to claim 2, characterized in that, The vibration mechanism (49) includes a fixed plate (491), a fixed column (493), a protrusion (494), and an extrusion block (495). The fixed plate (491) is fixedly installed on the combustion cylinder (41). The fixed column (493) passes through the fixed plate (491). The fixed column (493) and the fixed plate (491) are connected by a spring (492). The fixed column (493) is fixedly connected to the housing (44). The protrusion (494) is fixedly installed on the housing (44). The extrusion block (495) is fixedly installed on the material spreading mechanism (48). The material spreading mechanism (48) is used to drive the extrusion block (495) to rotate.

4. The circulating fluidized bed premixed combustion device according to claim 3, characterized in that, The material spreading mechanism (48) includes a push rod (481), a filter plate (482), a rotating shaft (483), and a second motor (484). The second motor (484) is fixedly installed on the combustion cylinder (41). The rotating shaft (483) is fixedly connected to the extrusion block (495) and is fixedly installed on the output shaft of the second motor (484). The rotating shaft (483) passes through the filter plate (482) and the housing (44). The filter plate (482) is fixedly installed on the combustion cylinder (41), and the push rod (481) is fixedly installed on the rotating shaft (483).

5. A circulating fluidized bed premixed combustion device according to claim 1, characterized in that, The screening mechanism (3) includes a cylinder (31), a screening plate (32), a cylindrical rod (33), a motor (34), and a rolling roller (35). The cylinder (31) is fixedly installed on a support base (2). The screening plate (32) is fixedly installed on the cylinder (31). The motor (34) is fixedly installed on a support base (2). The cylindrical rod (33) passes through the screening plate (32) and is fixedly connected to the output shaft of the motor (34). The rolling roller (35) is fixedly installed on the cylindrical rod (33).

6. The circulating fluidized bed premixed combustion device according to claim 5, characterized in that, The cylinder (31) is connected to the combustion cylinder (41) through a connecting pipe, and the combustion cylinder (41) is connected to the cyclone separator (5) through a circular pipe.

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