Fluidized bed combustion boiler with stable combustion

Abstract

The utility model relates to the technical field of fluidized bed boilers, and discloses a stable-combustion fluidized bed combustion boiler which comprises a boiler body, an air inlet mechanism is arranged at the lower end of the boiler body, a feeding pipe is installed on the left side surface of the boiler body in a penetrating mode, and a stock bin is installed on the upper surface of the feeding pipe in a penetrating mode. An adjusting plate is installed at the lower end of the left side surface of the stock bin in a penetrating mode, and an anti-blocking mechanism is arranged at the position, located above the adjusting plate, of the left side surface of the stock bin. Due to the fact that the air inlet mechanism is arranged, the air inlet mechanism provides air for the interior of the furnace body through the first air pipe and the second air pipe, and stable combustion of materials is guaranteed; the adjusting plate can adjust the size of the feeding opening, so that the feeding speed is adjusted; a motor in the anti-blocking mechanism drives a cam to rotate, the cam continuously pushes a sliding rod to drive an anti-blocking rod to continuously and rapidly ascend and descend, the materials in the lower end of the stock bin are stirred, and the situation that when a feeding opening is very small, the materials extrude one another, and blocking is caused is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fluidized bed boilers, in particular to a fluidized bed combustion boiler with stable combustion. Background Art

[0002] A fluidized bed boiler is a boiler that uses a fluidized bed combustion method. As an important thermal energy conversion equipment, it is widely used in multiple industries such as electricity, chemical industry, and metallurgy due to its advantages such as high combustion efficiency, wide fuel adaptability, and low pollutant emissions. However, during the loading process of existing fluidized bed boilers, it is easy for particles in the fluidized bed boiler to overflow, which not only causes heat loss, but also easily pollutes the surrounding environment, and has certain defects.

[0003] A Chinese patent discloses a fluidized bed boiler (authorization announcement number CN213656721U). The patented technology uses the principle of a lead screw and drives a feeding hopper to reciprocate through a driving motor, and can reciprocate the fuel placed in the storage hopper to the fluidized bed boiler. It can not only transport the fuel to the fluidized bed boiler, but also seal the feeding channel, effectively reducing the heat and particulate matter overflow in the fluidized bed boiler, and ensuring the normal and stable operation of the fluidized bed; the speed of the driving motor and the opening degree of the unloading valve plate can be adjusted according to the actual needs of the fluidized bed boiler to adjust the feeding speed, which greatly improves the flexibility of the fluidized bed boiler;

[0004] However, it has certain drawbacks: it adjusts the feeding speed by the speed of the driving motor and the opening degree of the discharge valve plate. When the opening of the discharge valve plate is small, the materials will be squeezed by each other and difficult to fall, resulting in blockage of the discharge, and then the normal combustion cannot be guaranteed. Utility Model Content

[0005] The purpose of the utility model is to provide a fluidized bed combustion boiler with stable combustion to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A fluidized bed combustion boiler with stable combustion comprises a furnace body, wherein an air inlet mechanism is provided at the lower end of the furnace body, and a material return mechanism is provided at the right side of the furnace body, an air distribution mechanism is installed at the lower end position of the interior of the furnace body, and a feed pipe is installed through the left surface of the furnace body, a feed mechanism is provided inside the feed pipe, and a silo is installed through the upper surface of the feed pipe, an adjusting plate is installed through the lower end position of the left surface of the silo, and an anti-blocking mechanism is provided on the left surface of the silo above the adjusting plate, the anti-blocking mechanism comprises a fixed plate, a driving mechanism is installed on the surface of the fixed plate, a connecting rod is installed on the upper end of the driving mechanism, a connecting plate is installed on the right end of the connecting rod, and a plurality of anti-blocking rods are installed on the right surface of the connecting plate.

[0008] As a further solution of the utility model: the air intake mechanism includes a fan, a first air duct is installed at the front end of the fan, one end of the first air duct is connected to the lower end of the furnace body, and a second air duct is installed through the upper surface of the first air duct, and the upper end of the second air duct is connected to the right side surface of the furnace body.

[0009] As a further solution of the utility model: the material return mechanism includes a cyclone separator, a first pipe is installed at the upper end of the cyclone separator, and a second pipe is installed at the lower end of the cyclone separator, and one end of the first pipe and the second pipe are both connected to the right side surface of the furnace body.

[0010] As a further solution of the utility model: the feeding mechanism includes a fixed frame, the fixed frame is installed on the left end of the feeding pipe, a telescopic cylinder is installed on one side surface of the fixed frame, a pushing block is installed on the telescopic end of the telescopic cylinder, and the pushing block is slidably connected to the inside of the feeding pipe.

[0011] As a further solution of the utility model: the driving mechanism includes a motor and a slider, a cam is installed at the output end of the motor, a sliding rod is slidably connected inside the slider, a fixed block is installed outside the sliding rod below the slider, and a spring is installed at the upper end of the fixed block.

[0012] As a further solution of the utility model: the fixed plate is installed on the left side surface of the silo, the connecting plate movably fits the left side surface of the silo, the anti-blocking rod passes through and is slidably connected to the left side surface of the silo, the motor is installed on the rear surface of the fixed plate, the slider is installed on the front surface of the fixed plate, the upper end of the sliding rod is connected to the left end of the connecting rod, and the lower end of the sliding rod fits the cam, the spring is located outside the sliding rod, and the upper end of the spring is installed on the lower surface of the slider.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model is provided with an air inlet mechanism, which provides air to the inside of the furnace body through the first air duct and the second air duct, thereby ensuring stable combustion of the material; the material return mechanism separates the material mixed in the smoke and returns it to the furnace body, thereby avoiding waste of the material; the feeding mechanism ensures that the heat in the furnace body will not be dissipated during the feeding process, and also avoids the airflow in the furnace body impacting the material and causing the material to overflow; the adjustment plate can adjust the size of the feeding opening, thereby adjusting the feeding speed; the motor in the anti-blocking mechanism drives the cam to rotate, and the cam continuously pushes the sliding rod, driving the anti-blocking rod to continuously and rapidly rise and fall, stirring the material inside the lower end of the silo, thereby avoiding the situation where the feeding opening is very small and the materials are squeezed against each other to cause blockage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a fluidized bed combustion boiler with stable combustion;

[0016] Figure 2 A cross-sectional view of a fluidized bed combustion boiler with stable combustion;

[0017] Figure 3 for Figure 2 A partial schematic diagram of

[0018] Figure 4 The diagram is a structural diagram of an anti-blocking mechanism in a fluidized bed combustion boiler with stable combustion.

[0019] In the figure: 1. furnace body; 2. air inlet mechanism; 3. fan; 4. first air duct; 5. second air duct; 6. material return mechanism; 7. cyclone separator; 8. first pipeline; 9. second pipeline; 10. air distribution mechanism; 11. feed pipe; 12. feed mechanism; 13. fixed frame; 14. telescopic cylinder; 15. push block; 16. silo; 17. adjustment plate; 18. anti-blocking mechanism; 19. fixed plate; 20. driving mechanism; 21. connecting rod; 22. connecting plate; 23. anti-blocking rod; 24. motor; 25. slider; 26. cam; 27. slide bar; 28. fixed block; 29. ​​spring. DETAILED DESCRIPTION

[0020] See also Figures 1 to 3In the embodiment of the utility model, a fluidized bed combustion boiler with stable combustion includes a furnace body 1, an air inlet mechanism 2 is arranged at the lower end of the furnace body 1, the air inlet mechanism 2 includes a fan 3, a first air duct 4 is installed at the front end of the fan 3, one end of the first air duct 4 is connected to the lower end of the furnace body 1, and a second air duct 5 is installed through the upper surface of the first air duct 4, and the upper end of the second air duct 5 is connected to the right side surface of the furnace body 1, and a return mechanism 6 is arranged on the right side of the furnace body 1, and the return mechanism 6 includes a cyclone separator 7, a first pipe 8 is installed at the upper end of the cyclone separator 7, and a second pipe 9 is installed at the lower end of the cyclone separator 7, the first pipe 8 and the second pipe 9 are connected to the right side surface of the furnace body 1, an air distribution mechanism 10 is installed at the lower end of the furnace body 1, and a feed pipe 11 is installed on the left side surface of the furnace body 1, and a feed mechanism 12 is arranged inside the feed pipe 11, and the feed mechanism 12 includes a fixed frame 13, the fixed frame 13 is installed on the left end of the feed pipe 11, a telescopic cylinder 14 is installed on one side surface of the fixed frame 13, and a push block 15 is installed at the telescopic end of the telescopic cylinder 14, and the push block 15 is slidably connected to the inside of the feed pipe 11, and a silo 16 is installed on the upper surface of the feed pipe 11, and an adjustment plate 17 is installed at the lower end of the left side surface of the silo 16;

[0021] The fan 3 is used to supply air to the interior of the furnace body 1 to ensure stable combustion of the material. The air in the first air duct 4 is discharged through the air distribution mechanism 10. The air distribution mechanism 10 includes an air distribution plate and a plurality of air caps installed on the air distribution plate.

[0022] An ignition mechanism is installed at the lower end of the furnace body 1 for igniting the material;

[0023] The cyclone separator 7 is used to separate the materials mixed in the smoke and discharge them into the furnace body 1 for re-combustion. A smoke exhaust port is provided on the upper surface of the cyclone separator 7. A return valve is installed between the cyclone separator 7 and the second pipe 9. The return valve returns the collected materials to the furnace body 1 in a controllable and stable manner and prevents the gas, solid and fluid at the bottom of the furnace from entering the cyclone separator 7 in reverse.

[0024] Materials are placed in the silo 16, and the weight of the adjustment plate 17 is relatively heavy. The adjustment plate 17 can be moved left and right to adjust the opening size, thereby adjusting the feeding speed;

[0025] The telescopic cylinder 14 is preferably electric, and the initial position of the pushing block 15 blocks the lower end of the silo 16. When it starts, it first moves to the left to the head, so that the material enters the feed pipe 11, and then moves to the right to the head to push the material into the furnace body 1. When the pushing block 15 is located at the rightmost end, it still blocks the lower end of the silo 16 to prevent the material from falling to the left area of ​​the pushing block 15; the feeding mechanism 12 can prevent the heat in the furnace body 1 from being dissipated through the feed pipe 11, and also prevent the airflow in the furnace body 1 from pushing the material in the silo 16 out; at the same time, adjusting the telescopic speed of the telescopic cylinder 14 can adjust the feeding speed.

[0026] exist Figure 1 , Figure 3 and Figure 4 In the figure: the left side surface of the silo 16 is located above the adjusting plate 17 and is provided with an anti-blocking mechanism 18, the anti-blocking mechanism 18 includes a fixing plate 19, the fixing plate 19 is installed on the left side surface of the silo 16, the surface of the fixing plate 19 is installed with a driving mechanism 20, the upper end of the driving mechanism 20 is installed with a connecting rod 21, the right end of the connecting rod 21 is installed with a connecting plate 22, the connecting plate 22 is movably fitted to the left side surface of the silo 16, and the right side surface of the connecting plate 22 is installed with a plurality of anti-blocking rods 23, the anti-blocking rods 23 penetrate and are slidably connected to the left side surface of the silo 16, and the driving mechanism 20 includes an electric The motor 24 and the slider 25 are installed on the rear surface of the fixed plate 19, and the slider 25 is installed on the front surface of the fixed plate 19. The output end of the motor 24 is installed with a cam 26. The slider 25 is slidably connected with a slide bar 27 inside. The upper end of the slide bar 27 is connected to the left end of the connecting rod 21, and the lower end of the slide bar 27 is attached to the cam 26. The outside of the slide bar 27 is located below the slider 25 and a fixed block 28 is installed. The upper end of the fixed block 28 is installed with a spring 29. The spring 29 is located outside the slide bar 27, and the upper end of the spring 29 is installed on the lower surface of the slider 25.

[0027] When the cam 26 rotates, it will continuously push the slide bar 27 upwards, and the slide bar 27 will drive the connecting plate 22 to rise and fall quickly, thereby driving the anti-blocking rod 23 to rise and fall quickly, stirring the material inside the lower end of the silo 16 to avoid blockage caused by squeezing between materials when the adjustment plate 17 is opened very small.

[0028] The working principle of the utility model is: when in use, the staff moves the adjustment plate 17 left and right to adjust the opening size, then the telescopic cylinder 14 moves leftward to the end first, and then rightward to the end, and the material dropped from the hopper 16 to the feed pipe 11 is pushed into the furnace body 1, and the motor 24 drives the cam 26 to rotate, and the cam 26 continuously pushes the slide bar 27 upward, and the slide bar 27 drives the anti-blocking rod 23 to rise and fall quickly through the connecting rod 21 and the connecting plate 22 to stir the material; the ignition mechanism ignites the material, and the air intake mechanism 2 supplies air to the inside of the furnace body 1 to increase oxygen; the smoke generated after combustion is separated and processed by the cyclone separator 7, and the material in the smoke is separated out, and discharged into the inside of the furnace body 1 through the second pipe 9 for re-combustion.

[0029] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A fluidized bed combustion boiler with stable combustion, comprising a furnace body (1), an air inlet mechanism (2) is arranged at the lower end of the furnace body (1), and a material return mechanism (6) is arranged on the right side of the furnace body (1), an air distribution mechanism (10) is installed at the lower end of the furnace body (1), and a feed pipe (11) is installed through the left side surface of the furnace body (1), a feed mechanism (12) is arranged inside the feed pipe (11), and a material bin (16) is installed through the upper surface of the feed pipe (11), characterized in that: An adjusting plate (17) is installed through the lower end of the left side surface of the silo (16), and an anti-blocking mechanism (18) is provided on the left side surface of the silo (16) above the adjusting plate (17). The anti-blocking mechanism (18) includes a fixing plate (19), a driving mechanism (20) is installed on the surface of the fixing plate (19), a connecting rod (21) is installed at the upper end of the driving mechanism (20), a connecting plate (22) is installed at the right end of the connecting rod (21), and a plurality of anti-blocking rods (23) are installed on the right side surface of the connecting plate (22).

2. A fluidized bed combustion boiler with stable combustion according to claim 1, characterized in that: The air inlet mechanism (2) comprises a fan (3), a first air duct (4) is installed at the front end of the fan (3), one end of the first air duct (4) is connected to the lower end of the furnace body (1), and a second air duct (5) is installed through the upper surface of the first air duct (4), and the upper end of the second air duct (5) is connected to the right side surface of the furnace body (1).

3. A fluidized bed combustion boiler with stable combustion according to claim 1, characterized in that: The material return mechanism (6) comprises a cyclone separator (7), a first pipe (8) is installed at the upper end of the cyclone separator (7), and a second pipe (9) is installed at the lower end of the cyclone separator (7), and one end of the first pipe (8) and the second pipe (9) are both connected to the right side surface of the furnace body (1).

4. A fluidized bed combustion boiler with stable combustion according to claim 1, characterized in that: The feeding mechanism (12) comprises a fixed frame (13), the fixed frame (13) is mounted on the left end of the feeding pipe (11), a telescopic cylinder (14) is mounted on one side surface of the fixed frame (13), a pushing block (15) is mounted on the telescopic end of the telescopic cylinder (14), and the pushing block (15) is slidably connected to the inside of the feeding pipe (11).

5. The fluidized bed combustion boiler with stable combustion according to claim 1, characterized in that: The driving mechanism (20) comprises a motor (24) and a slider (25), the output end of the motor (24) is provided with a cam (26), the interior of the slider (25) is slidably connected with a slide rod (27), the exterior of the slide rod (27) is provided with a fixed block (28) below the slider (25), and the upper end of the fixed block (28) is provided with a spring (29).

6. A fluidized bed combustion boiler with stable combustion according to claim 5, characterized in that: The fixed plate (19) is mounted on the left side surface of the silo (16); the connecting plate (22) is movably fitted to the left side surface of the silo (16); the anti-blocking rod (23) passes through and is slidably connected to the left side surface of the silo (16); the motor (24) is mounted on the rear surface of the fixed plate (19); the slider (25) is mounted on the front surface of the fixed plate (19); the upper end of the slider (27) is connected to the left end of the connecting rod (21), and the lower end of the slider (27) is fitted to the cam (26); the spring (29) is located outside the slider (27), and the upper end of the spring (29) is mounted on the lower surface of the slider (25).

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