Stokehole feeding mechanism of biomass boiler

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The biomass boiler's in-furnace feeding mechanism, which combines a conical roller and an auger blade, solves the problem of unstable heat release caused by uneven fuel entry into the furnace, thereby improving combustion efficiency and enhancing operational convenience.

CN223976061UActive Publication Date: 2026-03-06LIANGSHAN FUTURE NRG BIOLOGY ELECTRIC POWER CO LTD

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Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2025-04-14
Publication Date: 2026-03-06

AI Technical Summary

Technical Problem

Traditional biomass boiler feeder equipment cannot guarantee that biomass material enters the furnace in a stable and uniform volume, resulting in unstable heat release during combustion and problems of energy waste and increased pollutant emissions.

Method used

The furnace adopts a combination structure of conical roller and auger blade. The conical roller is driven by a motor to rotate, which in turn drives the auger blade to rotate inside the barrel, thereby extruding and uniformly conveying the biomass material and ensuring that the fuel enters the furnace body in the same volume. At the same time, an electric push rod and transmission frame structure are designed to enable the rapid opening and closing of the furnace cover.

Benefits of technology

It improves the uniform delivery and combustion efficiency of fuel, reduces energy waste and pollutant emissions, and enhances the flexibility and ease of operation of the boiler.

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Abstract

The utility model relates to the technical field of biomass boilers, and discloses a biomass boiler stokehole feeding mechanism which comprises a boiler body, an exhaust pipe is fixedly connected in the boiler body, a connecting frame is fixedly connected to one side of the boiler body, a charging barrel is fixedly connected to one side of the connecting frame, a lantern ring is fixedly connected to the outer wall of the boiler body, and the lantern ring is fixedly connected to the outer wall of the boiler body. A lantern ring is arranged in the charging barrel, a rotating assembly is arranged on the outer wall of the lantern ring, a feeding assembly is arranged in the charging barrel, the feeding assembly comprises a conical stick, the conical stick is rotationally connected to the interior of the charging barrel, an auger blade is fixedly connected to the outer wall of the conical stick, and a feeding hopper is fixedly connected to the interior of the charging barrel. According to the utility model, the conical roller is driven by the motor to rotate, the conical roller further drives the auger blade connected with the outer wall to rotate in the charging barrel, and as the auger blade is in a shape from large to small, in the rotating process, not only can biomass materials poured into the charging barrel be conveyed, but also the materials can be extruded; the effect that fuel with the same volume stably enters the furnace body is achieved.

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Description

Technical Field

[0001] This utility model relates to the field of biomass boiler technology, and in particular to a biomass boiler pre-furnace feeding mechanism. Background Technology

[0002] With increasing environmental awareness and rising demand for clean energy, biomass boilers, which use renewable biomass as fuel, have been widely used in industrial production and district heating. During the operation of a biomass boiler, the pre-furnace feeding mechanism plays a crucial role, directly affecting the boiler's combustion efficiency, stability, and energy utilization. Precise and efficient feeding ensures that biomass fuel enters the furnace evenly and stably, guaranteeing complete combustion, thereby reducing energy consumption and pollutant emissions. Therefore, the pre-furnace feeding mechanism of biomass boilers is of great significance for promoting the efficient utilization and sustainable development of biomass energy.

[0003] Traditional biomass boiler pre-furnace feeding equipment has its own mechanical structure and technical principle. The most common method is gravity feeding, which relies on the weight of the fuel itself to introduce the fuel into the furnace body through a simple hopper and pipe.

[0004] However, traditional biomass boiler pre-furnace feeding equipment cannot guarantee that biomass materials enter the furnace body in a stable and uniform volume. During the traditional feeding process, due to the lack of an effective extrusion and shaping mechanism, the bulk density of biomass materials and the volume entering the furnace body vary greatly. When the fuel particles are of different sizes and shapes, the amount of fuel entering the furnace body varies, resulting in unstable heat release during combustion. This not only reduces the combustion efficiency of the boiler but also causes energy waste and increased pollutant emissions. Therefore, a biomass boiler pre-furnace feeding mechanism is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a feeding mechanism for biomass boilers, which aims to improve the problem in the prior art where the amount of fuel entering the furnace varies when the fuel particles are of different sizes and shapes, resulting in unstable heat release during combustion.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A biomass boiler front feeding mechanism includes a boiler body, an exhaust pipe fixedly connected inside the boiler body, a connecting frame fixedly connected to one side of the boiler body, a material cylinder fixedly connected to one side of the connecting frame, a collar fixedly connected to the outer wall of the boiler body, a rotating component provided on the outer wall of the collar, and a feeding component provided inside the material cylinder.

[0008] The feeding assembly includes a conical roller, which is rotatably connected inside the material cylinder. An auger blade is fixedly connected to the outer wall of the conical roller. A feed hopper is fixedly connected inside the material cylinder. A motor is fixedly connected to one side of the connecting frame. The output end of the motor is connected to the conical roller. A discharge hopper is fixedly connected to one end of the material cylinder.

[0009] As a further description of the above technical solution:

[0010] The rotating assembly includes a support block and a rotating block. One side of the support block is fixedly connected to the outer wall of the collar, and the rotating block is rotatably connected to the outer wall of the support block.

[0011] As a further description of the above technical solution:

[0012] An electric push rod is fixedly connected to one side of the rotating block, and a connecting ring is fixedly connected to the output end of the electric push rod;

[0013] As a further description of the above technical solution:

[0014] A furnace cover is provided at one end of the furnace body, and a transmission frame is fixedly connected to one end of the furnace cover.

[0015] As a further description of the above technical solution:

[0016] A connecting block is fixedly connected to one side of the transmission frame, and the connecting ring is rotatably connected inside the connecting block.

[0017] As a further description of the above technical solution:

[0018] A fixed frame is fixedly connected to the outer wall of the furnace body, and the transmission frame is rotatably connected to the outer wall of the fixed frame.

[0019] As a further description of the above technical solution:

[0020] A support frame is fixedly connected to the outer wall of the furnace body, and a rotating column is rotatably connected inside the support frame.

[0021] As a further description of the above technical solution:

[0022] A screw is fixedly connected to the outer wall of the rotating column, the screw is slidably connected inside the furnace cover, and a nut is threaded onto the outer wall of the screw.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, the conical roller is driven by a motor to rotate, and the conical roller further drives the auger blade connected to the outer wall to rotate inside the feed cylinder. Since the auger blade itself is shaped from large to small, during the rotation process, it can not only transport the biomass material poured into the feed cylinder, but also compress the material, thus achieving the effect of making the fuel enter the furnace body stably with the same volume. This solves the problem that when the fuel particles are of different sizes and shapes, the amount of fuel entering the furnace body varies, resulting in unstable heat release during combustion, thereby improving the practicality of the feeding mechanism.

[0025] 2. In this utility model, the output end of the electric push rod drives the connecting ring to move, the connecting ring drives the connecting block, and the connecting block drives the transmission frame to rotate on the outer wall of the fixed frame. Finally, the transmission frame drives the furnace cover to flip open from one side of the furnace body, realizing the effect of opening and closing the furnace cover quickly and conveniently. This solves the problem that the traditional boiler furnace cover opening and closing method is cumbersome, time-consuming and labor-intensive, and difficult to flexibly cope with different working conditions, thereby improving the flexibility of the boiler. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of the biomass boiler pre-furnace feeding mechanism proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the feed cylinder of the biomass boiler pre-furnace feeding mechanism proposed in this utility model;

[0028] Figure 3 This is a schematic diagram of the furnace cover structure of the biomass boiler pre-furnace feeding mechanism proposed in this utility model.

[0029] Legend:

[0030] 1. Furnace body; 2. Connecting frame; 3. Material cylinder; 4. Motor; 5. Conical roller; 6. Screwdriver blade; 7. Feed hopper; 8. Discharge hopper; 9. Exhaust pipe; 10. Collar; 11. Support block; 12. Rotating block; 13. Electric push rod; 14. Connecting ring; 15. Furnace cover; 16. Transmission frame; 17. Connecting block; 18. Fixing frame; 19. Support frame; 20. Rotating column; 21. Screw; 22. Nut. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figures 1-3An embodiment of this utility model provides a biomass boiler pre-furnace feeding mechanism, including a furnace body 1, an exhaust pipe 9 fixedly connected inside the furnace body 1 for discharging exhaust gas during the combustion process, a connecting frame 2 fixedly connected to one side of the furnace body 1, the connecting frame 2 providing a reliable structural support for the fixing and support of the material cylinder 3, the material cylinder 3 fixedly connected to one side of the connecting frame 2, a collar 10 fixedly connected to the outer wall of the furnace body 1, a rotating component provided on the outer wall of the collar 10, and a feeding component provided inside the material cylinder 3;

[0033] The feeding assembly includes a conical roller 5, which is rotatably connected inside the material cylinder 3. An auger blade 6 is fixedly connected to the outer wall of the conical roller 5. The special design of the auger blade 6 gradually narrows from large to small. This shape design not only helps to efficiently propel materials, but also applies a certain amount of extrusion force to the materials to ensure uniform material delivery. A feed hopper 7 is fixedly connected inside the material cylinder 3. A motor 4 is fixedly connected to one side of the connecting frame 2. The output end of the motor 4 is connected to the conical roller 5. A discharge hopper 8 is fixedly connected to one end of the material cylinder 3.

[0034] Specifically, when using this biomass boiler, to ensure that the material can smoothly enter the furnace body 1, it is first necessary to feed the furnace body 1. At this time, the operator pours the pre-treated biomass material into the feed hopper 7. The design of the feed hopper 7 allows the material to slide into the material cylinder 3 in an orderly manner. The working mechanism inside the material cylinder 3 is crucial. After the material falls into the material cylinder 3, the motor 4 drives the conical roller 5 to rotate through its output end. The rotation of the conical roller 5 drives the auger blade 6 connected to the outer wall to rotate inside the material cylinder 3. The auger blade 6 is designed with a gradually decreasing shape from large to small. This design not only enables efficient material conveying, but also applies a certain amount of compressive force to the material during rotation. As the auger blade 6 rotates, the material is pushed along the inner wall of the material cylinder 3. At the same time, through its compressive action, the material can be compressed to maintain a relatively constant volume and ensure the stability of each feeding. The feeding process is continuous and uniform, ensuring that the biomass material enters the furnace body 1 accurately and stably. Finally, conveyed by the auger blades 6, the material flows into the furnace body 1 from the discharge hopper 8 at one end of the feed cylinder 3. The discharge hopper 8 is designed in a funnel shape, which can effectively guide the material smoothly into the combustion zone of the furnace body 1. In this process, there will be no accumulation or blockage of material, ensuring the continuous operation of the boiler. Furthermore, through reasonable feeding, the combustion efficiency of the biomass boiler can be improved.

[0035] Reference Figure 1 and Figure 3The rotating assembly includes a support block 11 and a rotating block 12. One side of the support block 11 is fixedly connected to the outer wall of the collar 10, and the rotating block 12 is rotatably connected to the outer wall of the support block 11. One side of the rotating block 12 is fixedly connected to an electric push rod 13, and the output end of the electric push rod 13 is fixedly connected to a connecting ring 14. One end of the furnace body 1 is provided with a furnace cover 15, and one end of the furnace cover 15 is fixedly connected to a transmission frame 16. The transmission frame 16 provides the necessary structural support for the sealing and operation of the boiler. A connecting block 17 is fixedly connected to one side of the transmission frame 16, and a connecting ring 14 is rotatably connected inside the connecting block 17. A fixed frame 18 is fixedly connected to the outer wall of the furnace body 1, and the transmission frame 16 is rotatably connected to the outer wall of the fixed frame 18. A support frame 19 is fixedly connected to the outer wall of the furnace body 1, and a rotating column 20 is rotatably connected inside the support frame 19. A screw 21 is fixedly connected to the outer wall of the rotating column 20, and the screw 21 is slidably connected inside the furnace cover 15. A nut 22 is threadedly connected to the outer wall of the screw 21, and the nut 22 is tightly connected to the screw 21 through the thread, ensuring the tightness and stability of the furnace cover 15.

[0036] Specifically, when the furnace cover 15 needs to be opened for maintenance or inspection, the operator first unscrews the nut 22 from the screw 21. The design of the nut 22 allows it to securely connect the furnace cover 15 to the furnace body 1. After removing the nut 22, the column 20 needs to be rotated to separate it from the screw 21, allowing the screw 21 to smoothly rotate out of the fixing device of the furnace cover 15. The cooperation between the rotating column 20 and the screw 21 ensures the stability and safety of the furnace cover 15. Next, the output end of the electric push rod 13 drives the connecting ring 14 to move smoothly. The design of the connecting ring 14 enables it to effectively transmit thrust, driving the connecting block 17 on the outer wall to move linearly. After being subjected to force, the connecting block 17 drives the transmission frame 16 on one side to rotate on the outer wall of the fixed frame 18. The rotation of the transmission frame 16 enables one side of the furnace cover 15 to be flipped open, thus allowing the furnace cover 15 to be smoothly flipped and removed from the top of the furnace body 1. This process can quickly and conveniently complete the opening and closing operation of the furnace cover 15, ensuring that boiler maintenance personnel can easily access the inside of the boiler for cleaning, inspection or other maintenance work, ensuring the safety and efficiency of the boiler, and greatly improving the ease of operation and maintenance of the boiler.

[0037] Working Principle: When feeding materials into the furnace body 1 using this biomass boiler, the material is first poured into the feed hopper 7, allowing it to fall into the material cylinder 3. At this time, the output of the motor 4 drives the conical roller 5 to rotate, causing the conical roller 5 to drive the auger blades 6 connected to the outer wall to rotate inside the material cylinder 3. During rotation, the auger blades 6 convey the material, and their tapering shape compresses the material during transport, ensuring that the material maintains a uniform volume as it enters the furnace body 1. Finally, the material enters the furnace body 1 through the discharge hopper 8 at one end of the material cylinder 3. This achieves the effect of effectively conveying and feeding materials. When it is necessary to open the furnace cover 15 from the furnace body 1, first unscrew the nut 22 from the screw 21, and then rotate the screw 21 out of the furnace cover 15 through the rotating column 20. At this time, the output end of the electric push rod 13 drives the connecting ring 14 to move. The connecting ring 14 is forced to drive the connecting block 17 on the outer wall to move. The connecting block 17 is forced to drive the transmission frame 16 connected on one side to rotate on the outer wall of the fixed frame 18, so that the transmission frame 16 drives the furnace cover 15 on one side to flip open from one side of the furnace body 1, thereby achieving the effect of easy opening and closing of the boiler.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A biomass boiler front feeding mechanism, comprising a furnace body (1), characterized in that: The inside fixedly connected with exhaust pipe (9), the furnace body (1) one side fixedly connected with connecting frame (2), the connecting frame (2) one side fixedly connected with material cylinder (3), the furnace body (1) outer wall fixedly connected with the thimble (10), the thimble (10) outer wall is provided with rotating assembly, the material cylinder (3) inside is provided with feeding assembly; The feeding assembly includes taper stick (5), the taper stick (5) is rotatably connected in the material cylinder (3), the taper stick (5) outer wall fixedly connected with auger blade (6), the material cylinder (3) inside fixedly connected with feed hopper (7), the connecting frame (2) one side fixedly connected with motor (4), the motor (4) output and the taper stick (5) are connected, the material cylinder (3) one end fixedly connected with discharge hopper (8).

2. A biomass boiler front feeding mechanism according to claim 1, characterized in that: The rotating assembly includes support block (11) and rotating block (12), the support block (11) one side fixedly connected in the thimble (10) outer wall, the rotating block (12) rotatably connected in the support block (11) outer wall.

3. A biomass boiler front feeding mechanism according to claim 2, characterized in that: The rotating block (12) one side fixedly connected with electric push rod (13), the electric push rod (13) output fixedly connected with connecting ring (14).

4. A biomass boiler front feeding mechanism according to claim 3, characterized in that: The furnace body (1) one end is provided with furnace cover (15), the furnace cover (15) one end fixedly connected with transmission frame (16).

5. A biomass boiler front feeding mechanism according to claim 4, characterized in that: The transmission frame (16) one side fixedly connected with connecting block (17), the connecting ring (14) rotatably connected in the connecting block (17).

6. A biomass boiler front feeding mechanism according to claim 5, characterized in that: The furnace body (1) outer wall fixedly connected with fixed frame (18), the transmission frame (16) rotatably connected in the fixed frame (18) outer wall.

7. A biomass boiler front feeding mechanism according to claim 6, characterized in that: The furnace body (1) outer wall fixedly connected with support frame (19), the support frame (19) inside rotatably connected with rotating column (20).

8. A biomass boiler front feeding mechanism according to claim 7, characterized in that: The rotating column (20) outer wall fixedly connected with screw rod (21), the screw rod (21) slidingly connected in the furnace cover (15), the screw rod (21) outer wall is screwed with nut (22).