Double-material-pipe anti-backfire automatic feeding device for biomass boiler

Abstract

The utility model discloses a double-material-pipe anti-backfire automatic feeding device for a biomass boiler, which belongs to the technical field of boiler feeding and comprises a hopper, the bottom end of the hopper is connected with a first discharging pipe, and the bottom end of the first discharging pipe is connected with a first conveying pipe; in the feeding process, fuel in the hopper can be sequentially conveyed twice in the first conveying pipe and the second conveying pipe, and the route of the two-time conveying is a roundabout route, so that the possibility of tempering is blocked, and the fuel entering the second conveying pipe is directly blown into the hearth under the action of the working fan, so that the combustion efficiency is improved. Flames in the hearth can be far away from the discharging opening, the possibility of backfire is avoided, meanwhile, the draught fan can supply air to the hearth, the combustion supporting effect on biomass fuel of the boiler is achieved, combustion of the boiler is more sufficient, the heat efficiency of the boiler is improved, the biomass feeding speed can be adjusted according to the load condition through speed adjustment of the variable-frequency speed reducer, and energy is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of boiler feeding, and particularly relates to a double-pipe anti-backfire automatic feeding device for biomass boilers. Background Technique

[0002] The fuel of a biomass boiler is biomass particles, which are renewable resources and belong to the energy-saving and environmental protection fuels supported and promoted by the state.

[0003] In the practical operation of biomass boilers, some screw feeders may have the condition of backfire due to unreasonable structural design, forming a potential safety hazard. Therefore, a double-pipe anti-backfire automatic feeding device for biomass boilers is needed to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a double-pipe anti-backfire automatic feeding device for biomass boilers to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A double-pipe anti-backfire automatic feeding device for biomass boilers, including a hopper, the bottom end of the hopper is connected with a first discharge pipe, the bottom end of the first discharge pipe is connected with a first conveying pipe, the bottom end of the first conveying pipe is connected with a second discharge pipe, the bottom end of the second discharge pipe is connected with a second conveying pipe, a spiral conveyor rod is rotatably connected in the first conveying pipe, one end of the spiral conveyor rod is connected with a first sprocket, the first sprocket is meshed with a second sprocket through a chain, the second sprocket is connected with the output shaft of a speed reducer, and one end of the second conveying pipe is connected with a blower.

[0006] By setting the above structure, the device can adjust the biomass feeding speed, feed evenly, operate continuously and stably, save energy, and is simple to manufacture, safe and reliable, and low in cost.

[0007] As a preferred scheme, the outer surface of the first conveying pipe is connected with a fixing plate, and the fixing plate is connected with the speed reducer.

[0008] As a preferred scheme, the hopper is communicated with the first discharge pipe, and the first discharge pipe is communicated with the first conveying pipe.

[0009] As a preferred scheme, the first conveying pipe is communicated with the second discharge pipe, and the second discharge pipe is communicated with the second conveying pipe.

[0010] As a preferred scheme, the size of the first sprocket is larger than that of the second sprocket, and the fixing plate is arranged between the second sprocket and the speed reducer.

[0011] As a preferred scheme, the speed reducer is set as a variable-frequency speed reducer.

[0012] As a preferred solution, the first conveying pipe is arranged between the second conveying pipe and the hopper.

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

[0014] In the present utility model, during the feeding process, since the fuel in the hopper can be conveyed in two times in the first conveying pipe and the second conveying pipe respectively, and the two conveying routes are in a circuitous route, the possibility of backfire is blocked. Moreover, the fuel entering the second conveying pipe is directly blown into the furnace under the action of the working fan, and the flame in the furnace will also be far away from the discharge port, avoiding the possibility of backfire. At the same time, the fan will also supply air to the furnace, playing a role in assisting combustion of the biomass fuel in the boiler, making the boiler burn more fully, improving the boiler thermal efficiency. By adjusting the speed through the variable frequency reduction gear, the biomass feeding speed can be adjusted according to the load condition, saving energy;

[0015] In the present utility model, by providing a reduction gear, since the reduction gear is a variable frequency reduction gear which can adjust the speed, the device can adjust the biomass feeding speed according to the load condition, saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a front three-dimensional structural schematic diagram of the present utility model;

[0017] Figure 2 is a rear three-dimensional structural schematic diagram of the present utility model;

[0018] Figure 3 is a partial three-dimensional sectional structural schematic diagram of the present utility model.

[0019] In the figure: 1, hopper; 2, first discharge pipe; 3, first conveying pipe; 4, second discharge pipe; 5, second conveying pipe; 6, screw conveyor; 7, first sprocket; 8, chain; 9, second sprocket; 10, fixing plate; 11, reduction gear; 12, fan. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following describes the present utility model in further detail with reference to the embodiments.

[0021] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement of the method of the present utility model under the premise of the concept of the present utility model belongs to the protection scope required by the present utility model.

[0022] Please refer to Figures 1 - 3, the present utility model provides a dual - pipe anti - backfire automatic feeding device for a biomass boiler, which includes a hopper 1. The bottom end of the hopper 1 is connected to a first discharge pipe 2. The bottom end of the first discharge pipe 2 is connected to a first conveying pipe 3. The bottom end of the first conveying pipe 3 is connected to a second discharge pipe 4. The bottom end of the second discharge pipe 4 is connected to a second conveying pipe 5. A spiral conveyor rod 6 is rotatably connected inside the first conveying pipe 3. One end of the spiral conveyor rod 6 is connected to a first sprocket 7. The first sprocket 7 is meshed with a second sprocket 9 through a chain 8. The second sprocket 9 is connected to the output shaft of a speed reducer 11. One end of the second conveying pipe 5 is connected to a blower 12. The outer surface of the first conveying pipe 3 is connected to a fixing plate 10. The fixing plate 10 is connected to the speed reducer 11. By setting the fixing plate 10, the fixing plate 10 can fix the speed reducer 11 behind the first conveying pipe 3;

[0023] The hopper 1 is communicated with the first discharge pipe 2. The first discharge pipe 2 is communicated with the first conveying pipe 3. The first conveying pipe 3 is communicated with the second discharge pipe 4. The second discharge pipe 4 is communicated with the second conveying pipe 5. The size of the first sprocket 7 is larger than that of the second sprocket 9. By setting the first sprocket 7 and the second sprocket 9, the rotating second sprocket 9 can drive the first sprocket 7 to rotate through the chain 8. Because the size of the first sprocket 7 is larger than that of the second sprocket 9, the rotation speed of the second sprocket 9 is faster than that of the first sprocket 7;

[0024] The fixing plate 10 is arranged between the second sprocket 9 and the speed reducer 11. The speed reducer 11 is set as a variable - frequency speed reducer 11. By setting the speed reducer 11, since the speed reducer 11 is set as a variable - frequency speed reducer 11, the variable - frequency speed reducer 11 can adjust the speed, so that the device can adjust the biomass feeding speed according to the load condition and save energy;

[0025] The first conveying pipe 3 is arranged between the second conveying pipe 5 and the hopper 1. By setting the first conveying pipe 3 and the second conveying pipe 5, since there are the first conveying pipe 3 and the second conveying pipe 5, the fuel in the hopper 1 can be conveyed in two times in the first conveying pipe 3 and the second conveying pipe 5 respectively, and the routes of the two - time conveying are in a circuitous route, thus blocking the possibility of backfire.

[0026] Working principle and usage process of the utility model: Connect the second conveying pipe 5 to the furnace opening of the external filter. After the biomass fuel is stored in the hopper 1, the fuel in the hopper 1 moves into the first conveying pipe 3 through the first discharge pipe 2. Control the reducer 11 to work. The working reducer 11 drives the second sprocket 9 to rotate. The rotating second sprocket 9 drives the first sprocket 7 to rotate at a low speed through the chain 8. The rotating first sprocket 7 drives the spiral conveying rod 6 to rotate. The rotating spiral conveying rod 6 can move the fuel entering the first conveying pipe 3 towards the direction of the second discharge pipe 4. When the biomass fuel moves above the second discharge pipe 4, the biomass fuel in the first conveying pipe 3 can enter the second conveying pipe 5 through the second discharge pipe 4. Then, the airflow generated by the working fan 12 can convey the biomass fuel in the second conveying pipe 5 into the furnace of the boiler.

[0027] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A dual - pipe anti - backfire automatic feeding device for a biomass boiler, including a hopper (1), characterized in that: The bottom end of the hopper (1) is connected to a first discharge pipe (2). The bottom end of the first discharge pipe (2) is connected to a first conveying pipe (3). The bottom end of the first conveying pipe (3) is connected to a second discharge pipe (4). The bottom end of the second discharge pipe (4) is connected to a second conveying pipe (5). A spiral conveyor rod (6) is rotatably connected inside the first conveying pipe (3). One end of the spiral conveyor rod (6) is connected to a first sprocket (7). The first sprocket (7) is engaged with a second sprocket (9) through a chain (8). The second sprocket (9) is connected to the output shaft of a speed reducer (11). One end of the second conveying pipe (5) is connected to a blower (12).

2. The dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 1, wherein: The outer surface of the first conveying pipe (3) is connected to a fixing plate (10). The fixing plate (10) is connected to the speed reducer (11).

3. The dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 1, characterized in that: The hopper (1) is in communication with the first discharge pipe (2). The first discharge pipe (2) is in communication with the first conveying pipe (3).

4. A dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 1, characterized in that: The first conveying pipe (3) is in communication with the second discharge pipe (4). The second discharge pipe (4) is in communication with the second conveying pipe (5).

5. The dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 2, wherein: The size of the first sprocket (7) is larger than the size of the second sprocket (9). The fixing plate (10) is arranged between the second sprocket (9) and the speed reducer (11).

6. The dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 1, wherein: The speed reducer (11) is a variable-frequency speed reducer (11).

7. The dual-material pipe anti-backfire automatic feeding device for a biomass boiler according to claim 1, characterized in that: The first conveying pipe (3) is arranged between the second conveying pipe (5) and the hopper (1).

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