Circulating bed boiler

Abstract

The invention provides a circulating bed boiler, which relates to the technical field of thermal power generation, and comprises an outer frame, a hearth is hung in the outer frame, a primary air assembly is arranged at the bottom of the hearth, a water cooling assembly is arranged in the hearth, two sides of the hearth are respectively connected with a feeding assembly and a cyclone separator, and the output end of one side of the cyclone separator is connected with a flue gas channel. The side, close to the cyclone separator, of the hearth is connected with a secondary air assembly. The bottom of the hearth is connected with a deslagging assembly. The system further comprises a hearth monitoring assembly used for monitoring materials and pressure in the hearth. The technical problem that ash blockage of the circulating bed boiler needs to be cleaned manually is solved.

Description

Technical Field

[0001] The invention belongs to the field of thermal power generation, and in particular relates to a circulating bed boiler. Background Art

[0002] After the coal particles and desulfurizer in the circulating bed boiler are sent into the furnace, they are quickly surrounded by a large amount of high-temperature materials, ignite and burn, and desulfurization reaction occurs at the same time. The gas-solid mixture produced by the combustion moves to the upper part of the furnace under the action of the rising flue gas flow, releasing heat to the water-cooled wall and the screen-type superheater arranged in the furnace and other heating surfaces. Under the action of gravity and external forces, the coarse particles deviate from the main airflow and flow down along the wall. After leaving the furnace, the gas-solid mixture enters the high-temperature separator. A large number of solid particles are separated and returned to the furnace for circulating combustion. The fine particles that are not separated enter the tail flue with the flue gas to heat the superheater, economizer and air preheater, and are finally discharged to the atmosphere through the dust collector;

[0003] When the existing circulating bed boiler is clogged, the slag is usually cleared manually. This operation is extremely dangerous and the operator is very likely to be injured, which can easily cause safety accidents. Summary of the invention

[0004] The present invention provides a circulating bed boiler to solve at least one technical problem raised in the above background technology.

[0005] In order to solve the above technical problems, the present invention discloses a circulating bed boiler, comprising: an outer frame, a furnace is hoisted inside the outer frame, a primary air component is arranged at the bottom of the furnace, a water cooling component is arranged in the furnace, a feeding component and a cyclone separator are respectively connected to both sides of the furnace, a flue gas channel is connected to the output end of one side of the cyclone separator, a secondary air component is connected to the side of the furnace close to the cyclone separator, and a slag discharge component is connected to the bottom of the furnace;

[0006] It also includes a furnace monitoring component for monitoring the material and pressure in the furnace.

[0007] Preferably, the primary air assembly includes a primary air chamber, which is arranged at the bottom of the furnace and separated from the furnace by a partition. The primary air chamber is connected to a plurality of ignition air ducts, and a plurality of ignition air ducts are connected to primary air inlet pipes, the other end of the primary air inlet pipe is connected to a primary centrifugal fan, the input end of the primary centrifugal fan is connected to a vertical suction pipe, an air preheater is provided on the vertical suction pipe, and the air preheater is installed on the flue gas channel. The primary air inlet pipe, the primary centrifugal fan and the vertical suction pipe are all installed on the outer frame, and a plurality of wind hoods are installed on the partition.

[0008] Preferably, the water-cooling component includes a steam drum, which is mounted on an outer frame, a plurality of downcomers are connected to the bottom of the steam drum, the other ends of the plurality of downcomers are connected to a water-cooled wall, the water-cooled wall is mounted on the inner wall of the furnace, an anti-wear structure is provided on the water-cooled wall, an output end of the water-cooled wall is connected to the steam drum through a riser, a saturated steam pipe is connected to the top of the steam drum, a superheater is connected to the output end of the saturated steam pipe, the output end of the superheater is connected to a superheated steam output pipe, the superheater is mounted at the air outlet at the top of the furnace, the output end of the superheated steam output pipe is connected to a steam turbine, a water inlet pipe is connected to the side of the steam drum, an economizer is provided on the water inlet pipe, an input end of the water inlet pipe is connected to a water source, and the economizer is mounted on the flue gas channel.

[0009] Preferably, the anti-wear structure includes transverse anti-wear grilles and longitudinal anti-wear grilles, and a plurality of transverse anti-wear grilles and a plurality of longitudinal anti-wear grilles are installed on the water-cooled wall, and a plurality of transverse anti-wear grilles and a plurality of longitudinal anti-wear grilles are arranged in a staggered manner.

[0010] Preferably, the feeding assembly includes a raw coal bin, which is installed on an outer frame. A conveyor belt is provided on the top of the raw coal bin. A coal feeder is connected to the discharge port at the bottom of the raw coal bin. The output pipe of the coal feeder is connected to an inclined coal drop pipe, and the inclined coal drop pipe is installed through the furnace.

[0011] Preferably, the secondary air assembly includes a secondary air duct, a plurality of secondary air ducts penetrate through and are installed on the furnace, the plurality of secondary air ducts are connected to the surrounding air ducts, the surrounding air ducts are arranged around the furnace, the surrounding air ducts are connected to the air inlet duct, the other end of the air inlet duct is connected to the secondary centrifugal fan, the secondary centrifugal fan is installed on the outer frame, and the air inlet duct is connected to the vertical air suction duct.

[0012] Preferably, the slag discharge assembly includes a slag discharge pipe, which passes through and is installed on the partition and the furnace. A slag cooler is connected to the slag discharge pipe through a three-way connector below, and the slag cooler is installed on the ground. A slag discharge interface is connected to the bottom outlet end of the three-way connector, and a slag discharge port is provided on the slag discharge interface. A slide is installed at the slag discharge port of the slag discharge interface, and a slag clearing rod is slidably connected in the slag discharge interface. The bottom slide of the slag clearing rod is connected to the base sleeve, and a sliding clamping groove is provided on the middle section of the slag clearing rod, and a pressure rod hammer is slidably connected in the sliding clamping groove, a pressure rod is connected to the pressure rod hammer, the middle part of the pressure rod is hinged to the pillar, and the other end of the pressure rod is hinged to the hydraulic telescopic rod.

[0013] Preferably, the furnace monitoring component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0014] Pressure sensor 1: used to detect the pressure in the primary air chamber, which is installed in the primary air chamber;

[0015] Pressure sensor 2: used to detect the upper pressure of the material at the bottom of the furnace, which is installed on the furnace;

[0016] Pressure sensor three: used to detect the static pressure of the material, which is set on the partition;

[0017] Pressure sensor 4: used to detect the pressure on the top of the furnace, which is set on the furnace;

[0018] Temperature sensor: used to detect the temperature in the furnace, which is set in the furnace;

[0019] Wind speed sensor 1: used to detect the wind speed of the primary wind, which is set in the primary wind inlet pipe;

[0020] Wind speed sensor 2: used to detect the wind speed of the secondary air, which is set in the secondary air duct;

[0021] The first acquisition module is used to acquire the material density in the furnace, and is arranged on the furnace;

[0022] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution unit to work based on the data results of the data processing module.

[0023] Preferably, the control module controls the execution module based on the data result of the data processing module, including the following steps:

[0024] Step 1: Pressure sensor 1, pressure sensor 2, pressure sensor 3, temperature sensor, wind speed sensor 1, wind speed sensor 1 and the first acquisition module calculate the fluidization coefficient M of the material in the furnace e :

[0025] Among them, M e is the fluidization coefficient of the material in the furnace, ∈ is the fluidization compensation coefficient of the furnace bottom, T is the detection value of the temperature sensor, P1 is the detection value of the pressure sensor 1, P2 is the detection value of the pressure sensor 2, P3 is the detection value of the pressure sensor 3, ρ is the detection value of the first acquisition module, V1 is the detection value of the wind speed sensor 1, P4 is the detection value of the pressure sensor 4, V2 is the detection value of the wind speed sensor 2, and E is the fluidization compensation coefficient of the furnace bottom;

[0026] Step 2: Data processing module comparison e and M e0 :

[0027] When M e <M e0 When the control module controls the execution module to adjust the primary air, secondary air and material parameters according to the standard data table. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0029] Figure 1 The structure of the present invention is schematically shown Figure 1 ;

[0030] Figure 2 The structure of the present invention is schematically shown Figure 2 ;

[0031] Figure 3 It is a schematic diagram of the furnace structure of the present invention;

[0032] Figure 4 It is a schematic structural diagram of the slag discharge assembly of the present invention.

[0033] In the figure: 1. outer frame; 11. furnace; 12. cyclone separator; 13. flue gas channel; 2. primary air assembly; 21. primary air chamber; 22. partition; 23. ignition air duct; 24. primary air inlet pipe; 25. primary centrifugal fan; 26. air preheater; 27. hood; 3. water cooling assembly; 31. steam drum; 32. downcomer; 33. water-cooled wall; 34. riser; 35. saturated steam pipe; 36. superheater; 37. superheated steam output pipe; 38. water inlet pipe; 39. economizer; 4. anti-wear structure; 41. transverse anti-wear grille; 42. Longitudinal anti-wear grille; 5. Feeding assembly; 51. Raw coal bin; 52. Conveyor belt; 53. Coal feeder; 54. Oblique coal drop pipe; 6. Secondary air assembly; 61. Secondary air duct; 62. Surrounding air duct; 63. Air inlet duct; 64. Secondary centrifugal fan; 7. Slag discharge assembly; 71. Slag discharge pipe; 72. Slag cooler; 73. Slag discharge interface; 74. Slag discharge port; 75. Slide; 76. Slag rod; 77. Base sleeve; 78. Sliding clamp groove; 79. Pressure rod hammer; 710. Pressure rod; 711. Pillar; 712. Hydraulic telescopic rod; 713. Three-way connector. DETAILED DESCRIPTION

[0034] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0035] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0036] The present invention provides the following embodiments

[0037] Example 1

[0038] The embodiment of the present invention provides a circulating bed boiler, such as Figure 1-4 As shown, it comprises: an outer frame 1, a furnace 11 is hoisted in the outer frame 1, a primary air component 2 is provided at the bottom of the furnace 11, a water cooling component 3 is provided in the furnace 11, a feeding component 5 and a cyclone separator 12 are respectively connected to both sides of the furnace 11, an output end of one side of the cyclone separator 12 is connected to a flue gas channel 13, a side of the furnace 11 close to the cyclone separator 12 is connected to a secondary air component 6, and a slag discharge component 7 is connected to the bottom of the furnace 11;

[0039] It also includes a furnace monitoring component for monitoring the material and pressure in the furnace.

[0040] The working principle and beneficial effects of the above technical solution are as follows: when starting the boiler, materials are added into the boiler through the feeding component 5, and then the primary air component 2 is started to ignite the boiler. After the boiler is ignited, the secondary air component 6 inputs oxygen into the furnace 11, and the heat heats the water cooling component 3 in the furnace 11, and the flue gas is discharged through the cyclone separator 12 and the flue gas channel 13. When the materials are burned out, the slag discharge component 7 discharges the ash in the furnace;

[0041] The present invention utilizes the slag discharge component 7 to perform automatic slag discharge and unblocking, thereby avoiding the need for manual slag discharge after slag blockage in the slag discharge component 7, reducing the risk of operators in the production process and ensuring the stable operation of the circulating bed boiler.

[0042] Example 2

[0043] On the basis of Example 1, the primary air assembly 2 includes a primary air chamber 21, which is arranged at the bottom of the furnace 11, and is separated from the furnace 11 by a partition 22. The primary air chamber 21 is connected to a plurality of ignition air ducts 23, and the plurality of ignition air ducts 23 are connected to primary air inlet pipes 24, and the other end of the primary air inlet pipe 24 is connected to a primary centrifugal fan 25. The primary air inlet pipe 24 is provided with an air preheater 26, and the air preheater 26 is installed on the flue gas channel 13. The primary air inlet pipe 24 and the primary centrifugal fan 25 are both installed on the outer frame 1, and a plurality of wind hoods 27 are installed on the partition 22.

[0044] The working principle and beneficial effects of the above technical solution are as follows: when the boiler is started, after adding materials into the boiler, the primary centrifugal fan 25 is started, the primary centrifugal fan 25 delivers air into the primary air inlet pipe 24, and then the air is heated by the air preheater 26, and then enters the primary air chamber 21 through the ignition air duct 23, and finally enters the furnace 11 through the air cap 27 on the partition 22. The primary air fluidizes the materials in the furnace 11, and at the same time, when passing through the ignition air duct 23, the primary air is heated to the ignition temperature of the materials, so that the primary air enters the furnace 11 and ignites the materials;

[0045] The present invention utilizes primary air to fluidize the material. This design can help to evenly distribute and mix the material particles, avoiding the occurrence of local fluidization anomalies such as bed deviation, throttling, channeling, etc., and the temperature in the furnace 11 can be adjusted by adjusting the primary air. At the same time, good mixing and uniform distribution of the primary air and the material help to improve the combustion efficiency. Through the adjustment of the primary air, the combustion process in the furnace can be optimized, the fuel can be more fully burned, and the overall operating efficiency of the boiler can be improved.

[0046] Example 3

[0047] On the basis of Example 1, the water-cooling assembly 3 includes a steam drum 31, which is installed on the outer frame 1. A plurality of downcomers 32 are connected to the bottom of the steam drum 31, and the other ends of the plurality of downcomers 32 are connected to a water-cooled wall 33. The water-cooled wall 33 is installed on the inner wall of the furnace 11, and an anti-wear structure 4 is provided on the water-cooled wall 33. The output end of the water-cooled wall 33 is connected to the steam drum 31 through a riser 34. A saturated steam pipe 35 is connected to the top of the steam drum 31, and a superheater 36 is connected to the output end of the saturated steam pipe 35. The output end of the superheater 36 is connected to a superheated steam output pipe 37. The superheater 36 is installed at the air outlet at the top of the furnace 11, and the output end of the superheated steam output pipe 37 is connected to the steam turbine. A water inlet pipe 38 is connected to the side of the steam drum 31, and an economizer 39 is provided on the water inlet pipe 38. The input end of the water inlet pipe 38 is connected to a water source, and the economizer 39 is installed on the flue gas channel 13.

[0048] The anti-wear structure 4 includes transverse anti-wear grilles 41 and longitudinal anti-wear grilles 42 . Several transverse anti-wear grilles 41 and longitudinal anti-wear grilles 42 are installed on the water-cooled wall 33 . Several transverse anti-wear grilles 41 and longitudinal anti-wear grilles 42 are arranged in a staggered manner.

[0049] The beneficial effects of the above technical solution are as follows: when the boiler starts combustion, the water source inputs the water flow into the water inlet pipe 38, and the water flow is preliminarily heated when passing through the economizer 39 on the water inlet pipe 38. After the water flow enters the steam drum 31, the water flow in the steam drum 31 flows into the water-cooled wall 33 from the downcomer 32, and the temperature in the furnace 11 heats the water-cooled wall 33, so that the water temperature rises and enters the steam drum 31 again from the riser 34, and the cycle is repeated until the water flow generates saturated steam, and the saturated steam enters the superheater 36 from the saturated steam pipe 35 of the steam drum 31 to further heat and produce superheated steam, and then the superheated steam is transported to the steam turbine from the superheated steam output pipe 37;

[0050] When the boiler heats the water-cooled wall 33, the material particles and ash particles wash the water-cooled wall 33, and the transverse anti-wear grid 41 and the longitudinal anti-wear grid 42 are staggered to form a plurality of rectangular grids, and the flow velocity of the material particles and ash particles in the rectangular frame is reduced, so that the wear of the water-cooled wall 33 is reduced;

[0051] The present invention utilizes the water-cooled wall 33 to absorb the heat in the boiler. This design can directly absorb the heat radiated by the high-temperature flame in the furnace 11, so that the water in the water-cooled wall 33 tubes gradually evaporates into a steam-water mixture, completing the evaporation process of the working medium. In addition, the water-cooled wall 33 can significantly reduce the temperature of the heating surface in the furnace 11, thereby reducing the damage of thermal stress to the boiler structure and protecting the boiler body from damage. At the same time, by laying the water-cooled wall 33, slagging of the furnace wall and the heating surface can be prevented, thereby improving the safety and reliability of the boiler operation.

[0052] The design of the anti-wear structure 4 reduces material particles and ash particles by dividing different areas into rectangular grids, thereby ensuring the service life of the water-cooled wall 33.

[0053] Example 4

[0054] On the basis of Example 1, the feeding assembly 5 includes a raw coal bin 51, which is installed on the outer frame 1. A conveyor belt 52 is provided on the top of the raw coal bin 51. The bottom discharge port of the raw coal bin 51 is connected to a coal feeder 53. The output pipe of the coal feeder 53 is connected to an inclined coal drop pipe 54, and the inclined coal drop pipe 54 is installed through the furnace 11.

[0055] The beneficial effects of the above technical solution are as follows: after the conveyor belt 52 transports the coal into the raw coal bin 51, the coal feeder 53 evenly transports the coal in the raw coal bin 51 to the inclined coal drop pipe 54, and then into the furnace 11. This design can achieve a stable supply of coal in the furnace 11 and ensure the stability of temperature control in the furnace 11.

[0056] Example 5

[0057] On the basis of Example 1, the secondary air assembly 6 includes a secondary air duct 61, and a plurality of secondary air ducts 61 penetrate and are installed on the furnace 11. The plurality of secondary air ducts 61 are connected to the surrounding air duct 62. The surrounding air duct 62 is arranged around the furnace 11. The surrounding air duct 62 is connected to the air inlet duct 63. The other end of the air inlet duct 63 is connected to a secondary centrifugal fan 64. The secondary centrifugal fan 64 is installed on the outer frame 1, and an air preheater 26 is provided on the air inlet duct 63.

[0058] The beneficial effects of the above technical solution are as follows: after the boiler is started, the secondary centrifugal fan 64 starts to transport secondary air into the air inlet duct 63, and then the air preheater 26 heats the secondary air, and the secondary air enters the furnace 11 through the surround air duct 62 and the secondary air duct 61. The present invention transports oxygen into the furnace 11 through the secondary air. This design can further supplement the oxygen required for combustion and enhance the backmixing and blending of materials.

[0059] Example 6

[0060] On the basis of Example 1, the slag discharge assembly 7 includes a slag discharge pipe 71, which passes through and is installed on the partition 22 and the furnace 11. The slag discharge pipe 71 is connected to a slag cooler 72 through a three-way connector 713 below. The slag cooler 72 is installed on the ground. The bottom outlet end of the three-way connector 713 is connected to a slag discharge interface 73. The slag discharge interface 73 is provided with a slag discharge port 74. The slag discharge interface 73 is provided with a slide 75 at the slag discharge port 74. A slag passing rod 76 is slidably connected in the slag discharge interface 73. The bottom slide of the slag passing rod 76 is connected to the base sleeve 77. A sliding clamping groove 78 is provided in the middle section of the slag passing rod 76. A pressure rod hammer 79 is slidably connected in the sliding clamping groove 78. A pressure rod 710 is connected to the pressure rod hammer 79. The middle part of the pressure rod 710 is hinged to the support 711, and the other end of the pressure rod 710 is hinged to a hydraulic telescopic rod 712.

[0061] The beneficial effects of the above technical solution are as follows: when the boiler is discharging slag, the slag enters the slag cooler 72 through the slag discharge pipe 71 for processing. If the slag discharge pipe 71 is blocked during the slag discharge process, the slag cooler channel is closed by adjusting the three-way connector 713, the slag clearing rod channel is opened, and the hydraulic telescopic rod 712 is extended to make the pressure rod 710 rotate around the support 711, thereby making the pressure rod hammer 79 slide in the sliding clamping groove 78, and the top pressure clearing rod 76 slides in the base sleeve 77, and the clearing rod 76 slides in the slag discharge pipe 71 to push away the slag blockage;

[0062] The present invention clears the slag discharge pipe 71 through the slag clearing rod 76. This design can avoid the danger of manual slag clearing, ensure the safety of the operators, and avoid accidents.

[0063] Example 7

[0064] On the basis of Example 1, the furnace monitoring component includes a control module, a data processing module, a detection module and an execution module, and the detection module includes:

[0065] Pressure sensor 1: used to detect the pressure in the primary air chamber 21, and disposed in the primary air chamber 21;

[0066] Pressure sensor 2: used to detect the upper layer pressure of the material at the bottom of the furnace 11, and is arranged on the furnace 11;

[0067] Pressure sensor three: used to detect the static pressure of the material, which is arranged on the partition 22;

[0068] Pressure sensor 4: used to detect the pressure on the top of the furnace 11, which is arranged on the furnace 11;

[0069] Temperature sensor: used to detect the temperature in the furnace 11, and disposed in the furnace 11;

[0070] Wind speed sensor 1: used to detect the wind speed of the primary wind, which is arranged in the primary wind inlet pipe 24;

[0071] Wind speed sensor 2: used to detect the wind speed of the secondary air, which is arranged in the secondary air duct 61;

[0072] A first acquisition module: used to acquire the material density in the furnace 11, which is arranged on the furnace 11;

[0073] The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution unit to work based on the data results of the data processing module.

[0074] The control module controls the execution module based on the data result of the data processing module, including the following steps:

[0075] Step 1: Pressure sensor 1, pressure sensor 2, pressure sensor 3, temperature sensor, wind speed sensor 1, wind speed sensor 1 and first acquisition module calculate the material fluidization coefficient M in the furnace 11 e :

[0076] Among them, M e is the material fluidization coefficient in the furnace 11, ∈ is the fluidization compensation coefficient at the bottom of the furnace 11, T is the detection value of the temperature sensor, P1 is the detection value of the pressure sensor 1, P2 is the detection value of the pressure sensor 2, P3 is the detection value of the pressure sensor 3, ρ is the detection value of the first acquisition module, V1 is the detection value of the wind speed sensor 1, P4 is the detection value of the pressure sensor 4, V2 is the detection value of the wind speed sensor 2, and E is the fluidization compensation coefficient at the bottom of the furnace 11;

[0077] Step 2: Data processing module comparison e and M e0 :

[0078] When M e <M e0 When the control module controls the execution module to adjust the primary air, secondary air and material parameters according to the standard data table.

[0079] The beneficial effect of the above technical solution is: since the changes in temperature and pressure in the furnace 11 have a certain impact on the furnace 11, the operation of the furnace 11 is observed by monitoring the pressure changes and temperature changes in the furnace 11, thereby avoiding the sudden drop in material and blockage caused by the sudden change in temperature and pressure inside the furnace 11. The present invention ensures the stable operation of the circulating bed boiler and avoids safety accidents of the circulating bed boiler.

[0080] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A circulating bed boiler, characterized in that: include: An outer frame (1), a furnace (11) is hoisted inside the outer frame (1), a primary air assembly (2) is provided at the bottom of the furnace (11), a water cooling assembly (3) is provided in the furnace (11), a feeding assembly (5) and a cyclone separator (12) are respectively connected to both sides of the furnace (11), an output end of one side of the cyclone separator (12) is connected to a flue gas channel (13), a side of the furnace (11) close to the cyclone separator (12) is connected to a secondary air assembly (6), and a slag discharge assembly (7) is connected to the bottom of the furnace (11); It also includes a furnace monitoring component for monitoring the material and pressure in the furnace.

2. A circulating bed boiler according to claim 1, characterized in that: The primary air assembly (2) comprises a primary air chamber (21), the primary air chamber (21) being arranged at the bottom of the furnace (11), the primary air chamber (21) being separated from the furnace (11) by a partition (22), the primary air chamber (21) being connected to a plurality of ignition air ducts (23), the plurality of ignition air ducts (23) being connected to a primary air inlet pipe (24), the other end of the primary air inlet pipe (24) being connected to a primary centrifugal fan (25), the primary air inlet pipe (24) being provided with an air preheater (26), the air preheater (26) being installed on the flue gas channel (13), the primary air inlet pipe (24) and the primary centrifugal fan (25) being installed on the outer frame (1), and a plurality of air hoods (27) being installed on the partition (22).

3. A circulating bed boiler according to claim 1, characterized in that: The water cooling assembly (3) comprises a steam drum (31), the steam drum (31) is mounted on the outer frame (1), a plurality of downcomers (32) are connected to the bottom of the steam drum (31), the other ends of the plurality of downcomers (32) are connected to a water cooling wall (33), the water cooling wall (33) is mounted on the inner wall of the furnace (11), an anti-wear structure (4) is provided on the water cooling wall (33), the output end of the water cooling wall (33) is connected to the steam drum (31) through a riser (34), the top of the steam drum (31) is connected to a saturated steam pipe (35), and the saturated steam The output end of the steam pipe (35) is connected to a superheater (36), and the output end of the superheater (36) is connected to a superheated steam output pipe (37). The superheater (36) is installed at the air outlet on the top of the furnace (11), and the output end of the superheated steam output pipe (37) is connected to the steam turbine. A water inlet pipe (38) is connected to the side of the steam drum (31), and an economizer (39) is provided on the water inlet pipe (38). The input end of the water inlet pipe (38) is connected to a water source, and the economizer (39) is installed on the flue gas channel (13).

4. A circulating bed boiler according to claim 3, characterized in that: The anti-wear structure (4) comprises a transverse anti-wear grille (41) and a longitudinal anti-wear grille (42). The plurality of transverse anti-wear grilles (41) and the plurality of longitudinal anti-wear grilles (42) are installed on the water-cooled wall (33). The plurality of transverse anti-wear grilles (41) and the plurality of longitudinal anti-wear grilles (42) are arranged in a staggered manner.

5. The circulating bed boiler according to claim 1, characterized in that: The feeding assembly (5) comprises a raw coal bin (51), which is mounted on the outer frame (1). A conveyor belt (52) is provided on the top of the raw coal bin (51). A coal feeder (53) is connected to the discharge port at the bottom of the raw coal bin (51). The output pipe of the coal feeder (53) is connected to an oblique coal drop pipe (54), and the oblique coal drop pipe (54) is installed through the furnace (11).

6. A circulating bed boiler according to claim 1, characterized in that: The secondary air assembly (6) comprises a secondary air duct (61). A plurality of secondary air ducts (61) penetrate through and are installed on the furnace (11). The plurality of secondary air ducts (61) are connected to a surrounding air duct (62). The surrounding air duct (62) is arranged around the furnace (11). The surrounding air duct (62) is connected to an air inlet duct (63). The other end of the air inlet duct (63) is connected to a secondary centrifugal fan (64). The secondary centrifugal fan (64) is installed on the outer frame (1). An air preheater (26) is provided on the air inlet duct (63).

7. The circulating bed boiler according to claim 1, characterized in that: The slag discharge assembly (7) comprises a slag discharge pipe (71), the slag discharge pipe (71) penetrates and is installed on the partition (22) and the furnace (11), the lower part of the slag discharge pipe (71) is connected to a slag cooler (72) through a three-way connector (8), the slag cooler (72) is installed on the ground, the bottom outlet end of the three-way connector (713) is connected to a slag discharge interface (73), a slag discharge port (74) is provided on the slag discharge interface (73), and a slideway (76) is installed at the slag discharge port (74) of the slag discharge interface (73). 5), a slag-clearing rod (76) is slidably connected in the slag discharge interface (73), a bottom slideway of the slag-clearing rod (76) is connected in the base sleeve (77), a sliding clamping groove (78) is provided in the middle section of the slag-clearing rod (76), a pressure rod hammer (79) is slidably connected in the sliding clamping groove (78), a pressure rod (710) is connected to the pressure rod hammer (79), a middle part of the pressure rod (710) is hingedly connected to the support (711), and the other end of the pressure rod (710) is hingedly connected to a hydraulic telescopic rod (712).

8. The circulating bed boiler according to claim 1, characterized in that: The furnace monitoring components include control module, data processing module, detection module and execution module. The detection module includes: Pressure sensor 1: used for detecting the pressure in the primary air chamber (21), and arranged in the primary air chamber (21); Pressure sensor 2: used to detect the upper layer pressure of the material at the bottom of the furnace (11), and arranged on the furnace (11); Pressure sensor 3: used to detect the static pressure of the material, which is arranged on the partition (22); Pressure sensor 4: used for detecting the pressure at the top of the furnace (11), and arranged on the furnace (11); A temperature sensor: used for detecting the temperature in the furnace (11), and arranged in the furnace (11); Wind speed sensor 1: used to detect the wind speed of the primary wind, and arranged in the primary wind inlet pipe (24); Wind speed sensor 2: used to detect the wind speed of the secondary air, and disposed in the secondary air duct (61); A first acquisition module: used for acquiring the density of the material in the furnace (11), and arranged on the furnace (11); The detection module is electrically connected to the data processing module, the control module is electrically connected to the data processing module and the execution module, and the control module controls the execution unit to work based on the data results of the data processing module.

9. A circulating bed boiler according to claim 8, characterized in that: The control module controls the execution module based on the data result of the data processing module, including the following steps: Step 1: Pressure sensor 1, pressure sensor 2, pressure sensor 3, temperature sensor, wind speed sensor 1, wind speed sensor 2 and a first acquisition module calculate the fluidization coefficient M of the material in the furnace (11) e : Among them, M e is the material fluidization coefficient in the furnace (11), ∈ is the fluidization compensation coefficient of the bottom of the furnace (11), T is the detection value of the temperature sensor, P1 is the detection value of the pressure sensor 1, P2 is the detection value of the pressure sensor 2, P3 is the detection value of the pressure sensor 3, ρ is the detection value of the first acquisition module, V1 is the detection value of the wind speed sensor 1, P4 is the detection value of the pressure sensor 4, V2 is the detection value of the wind speed sensor 2, and E is the fluidization compensation coefficient of the bottom of the furnace (11); Step 2: Data processing module comparison e and M e0 : When M e <M e0 When the control module controls the execution module to adjust the primary air, secondary air and material parameters according to the standard data table.

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