Biomass gasification combustion boiler

Abstract

The utility model discloses a kind of biomass gasification combustion boiler, including boiler shell, further include: pneumatic feeding mechanism, the pneumatic feeding mechanism is arranged in the top position of boiler shell, the pneumatic feeding mechanism includes a transverse distribution's conveying main pipeline, the top end of the spiral feeder is connected with discharge pipe, the discharge pipe is through the top center of boiler shell, the conveying main pipeline is installed with the spiral feeder for conveying material in the end away from discharge pipe, and in the top of the conveying main pipeline and the end close to spiral feeder is connected with feed hopper, the top of the discharge pipe is provided with top air inlet, the middle part of the discharge pipe is funnel-shaped.The utility model is filled into gas by top air inlet top, and the suction force generated when gas passes through throat portion further absorbs gas source, airflow forms turbulent flow in pipeline, fully disperses the small agglomerate of rice hull powder, and lay foundation for subsequent dispersion.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass gasification devices, and in particular to a biomass gasification combustion boiler. Background Technology

[0002] In the global shift towards cleaner energy, gasifiers, as core equipment for efficiently converting solid fuels into combustible gases, play an irreplaceable role in energy production, rural heating, and distributed power generation. Among them, small gasifiers, with their compact structure and flexible operation, have become key equipment for the on-site conversion and utilization of biomass resources such as grains and straw in rural and agricultural areas. They not only convert agricultural waste into energy for cooking and heating, reducing dependence on fossil fuels, but also reduce environmental pollution from waste incineration, contributing to the optimization of rural energy structures and the achievement of carbon neutrality goals.

[0003] However, existing small-scale gasifiers generally face technical bottlenecks in raw material handling and transportation when processing grain processing by-products such as rice husks. Due to cost constraints, small-scale equipment cannot be equipped with high-precision crushing and screening systems, and rice husks often cannot achieve the ideal particle size, resulting in a large amount of insufficiently crushed rice husk particles and fibrous impurities mixed in. These coarse particles are prone to blockage due to poor flowability and entanglement when passing through components such as screw feeders and conveying pipes, leading to interruptions in raw material transportation. Even if some particles manage to enter the furnace, uneven particle size and imbalanced distribution can cause local overfeeding or underfeeding in the gasification reaction zone, resulting in drastic temperature fluctuations inside the furnace. This not only reduces the carbon conversion rate but also leads to a surge in tar production, exacerbating the burden on subsequent purification systems.

[0004] Based on the above viewpoints, those skilled in the art have proposed a biomass gasification combustion boiler. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a biomass gasification combustion boiler. This biomass gasification combustion boiler draws in gas through the suction generated when the gas injected at the top of the air inlet passes through the throat. The airflow forms turbulence in the pipe, which fully disperses the small agglomerates of rice husk powder, laying the foundation for subsequent dispersion.

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

[0007] A biomass gasification combustion boiler includes a boiler shell and further includes:

[0008] A pneumatic feeding mechanism is installed at the top of the boiler shell. The pneumatic feeding mechanism includes a horizontally distributed main conveying pipe. A discharge pipe is connected through the top of the main conveying pipe and passes through the center of the top of the boiler shell. A screw feeder for conveying materials is installed at the end of the main conveying pipe away from the discharge pipe. A feed hopper is connected at the top of the main conveying pipe and near the screw feeder. A top air inlet is provided at the top of the discharge pipe. The middle part of the discharge pipe is funnel-shaped, and an interface for connecting to a pipe is provided at its throat.

[0009] The bulk material mechanism is located directly below the discharge pipe. The bulk material mechanism includes a bearing disc fixed to the inner wall of the boiler shell, and a bulk material tray is rotatably connected to the inner wall of the bearing disc.

[0010] Preferably, an air duct is fixedly connected to the bottom of the discharge pipe.

[0011] Preferably, the bulk material mechanism includes a drive motor for driving the bulk material tray to rotate, a motor gear is provided on the movable end of the drive motor, and a top bevel gear is provided on the top of the bulk material tray, the top bevel gear meshing with the motor gear.

[0012] Preferably, the outer wall of the top air inlet is provided with a branch pipe and connected to a distribution pipe, the other end of the distribution pipe is connected to a bottom air outlet pipe, and the bottom air outlet pipe is installed at the bottom of the main conveying pipeline.

[0013] Preferably, the top of the bottom air outlet pipe is provided with several strip-shaped slots for exhaust.

[0014] Preferably, the screw feeder includes a threaded rod and a motor that drives the threaded rod to rotate.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, some gas is discharged through the exhaust groove opened on the bottom exhaust pipe, which generates a drag force on the rice husk powder particles, overcomes the particle weight and pipe friction, and makes the powder suspend in the airflow and flow with the pipe. Meanwhile, the top air inlet uses a high-temperature gas source to inject at high speed to avoid the powdered rice husk particles from clogging the top air inlet.

[0017] 2. In this utility model, when the gas injected into the top of the top air inlet passes through the throat, it will generate suction and then draw the air source in through the interface. The airflow forms turbulence in the pipe, which fully disperses the small agglomerates of rice husk powder, laying the foundation for subsequent dispersion. Attached Figure Description

[0018] Figure 1This is a perspective view of a biomass gasification combustion boiler proposed in this utility model;

[0019] Figure 2 This is a schematic diagram of the pneumatic feeding mechanism and the dispersing mechanism in a biomass gasification combustion boiler proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the pneumatic feeding mechanism in a biomass gasification combustion boiler proposed in this utility model.

[0021] Figure 4 This is a schematic diagram of the internal structure of a pneumatic feeding mechanism in a biomass gasification combustion boiler proposed in this utility model.

[0022] Legend:

[0023] 1. Boiler shell; 2. Pneumatic feeding mechanism; 3. Material dispersing mechanism;

[0024] 22. Main conveying pipeline; 23. Screw feeder; 24. Top air inlet; 25. Discharge pipe; 26. Air guide port; 27. Bottom air outlet; 28. Air distribution pipe;

[0025] 31. Drive motor; 32. Motor gear; 33. Bearing disc; 34. Top bevel gear; 35. Material tray. Detailed Implementation

[0026] 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.

[0027] Reference Figures 1-3This utility model provides an embodiment of a biomass gasification combustion boiler, including a boiler shell 1 and a pneumatic feeding mechanism 2. The pneumatic feeding mechanism 2 is located at the top of the boiler shell 1 and includes a horizontally distributed main conveying pipe 21. A discharge pipe 24 is connected through the top of the main conveying pipe 21 and passes through the center of the top of the boiler shell 1. A screw feeder 22 for conveying materials is installed at the end of the main conveying pipe 21 away from the discharge pipe 24. A feed hopper is connected at the top of the main conveying pipe 21 and near the screw feeder 22. A top air inlet 23 is provided at the top of the discharge pipe 24. The middle part of the discharge pipe 24 is funnel-shaped, and its throat is provided with an interface for connecting to a pipe. A material dispersing mechanism 3 is located directly below the discharge pipe 24. Mechanism 3 includes a bearing disc 33 fixed to the inner wall of the boiler shell 1, and a material distribution disc 35 is rotatably connected to the inner wall of the bearing disc 33. The powdered rice husk particles added from the feed hopper are conveyed by a screw feeder 22. The powdered rice husk particles move towards the top air inlet 23, which is used to connect to an external air source. The air source gas can be selected as high-temperature air, high-temperature steam, or other gases that are beneficial to the gasification of powdered rice husk particles. Using a high-temperature air source to fill the top air inlet 23 can prevent the powdered rice husk particles from clogging the top air inlet 23. At the same time, the interface set at the throat of the top air inlet 23 is used to connect to another air source. When the gas filled at the top of the top air inlet 23 passes through the throat, it will generate suction and then draw the air source in through the interface. The airflow forms turbulence in the pipe, which fully disperses the small agglomerates of rice husk powder and lays the foundation for subsequent dispersion.

[0028] Reference Figure 4 The bottom of the discharge pipe 24 is fixedly connected to an air guide port 25. The outer wall of the top air inlet 23 is provided with a branch pipe and connected to a distribution pipe 27. The other end of the distribution pipe 27 is connected to a bottom air outlet pipe 26. The bottom air outlet pipe 26 is installed at the bottom of the main conveying pipe 21. The top of the bottom air outlet pipe 26 is provided with several strip-shaped slots for exhaust. Part of the air source is injected into the bottom air outlet pipe 26 through the distribution pipe 27. This part of the gas is discharged through the exhaust slots opened on the bottom air outlet pipe 26, which generates a drag force on the rice husk powder particles, overcomes the particle weight and pipe friction, and makes the powder suspend in the airflow and flow with the pipe. The air source feed is regulated by a carrier air flow regulating valve to avoid material interruption or excessive feeding.

[0029] Reference Figure 3The bulk material mechanism 3 includes a drive motor 31 for driving the bulk material tray 35 to rotate. A motor gear 32 is provided on the movable end of the drive motor 31. A top bevel tooth 34 is provided on the top of the bulk material tray 35. The top bevel tooth 34 meshes with the motor gear 32. After the powdered rice husk particles are discharged from the top air inlet 23 and the air guide 25, they fall onto the bulk material tray 35. Driven by the drive motor 31 and the motor gear 32, the powder falling into the bulk material tray 35 can rotate and be evenly dispersed inside the boiler shell 1.

[0030] Reference Figure 4 The screw feeder 22 includes a threaded rod and a motor that drives the threaded rod to rotate. The motor drives the threaded rod to rotate, thereby conveying the powdered rice husk particles. It can achieve uniform speed transmission of the powdered rice husk particles.

[0031] Working Principle: This device utilizes a screw feeder 22 to convey powdered rice husk particles added from the feed hopper. The powdered rice husk particles move towards the top air inlet 23, which is used to connect to an external air source. The air source can be high-temperature air, high-temperature steam, or other gases beneficial to the vaporization of the powdered rice husk particles. Using a high-temperature air source to fill the top air inlet 23 prevents the powdered rice husk particles from clogging it. Simultaneously, part of the air source is injected into the bottom air outlet 26 through the air distribution pipe 27. This portion of the air is discharged through the exhaust groove on the bottom air outlet 26, generating a drag force on the rice husk powder particles, overcoming the particle's weight and pipe friction, thus suspending the powder. The airflow flows through the pipeline. The air supply is regulated by a carrier gas flow regulating valve to prevent material interruption or overfeeding. The interface at the throat of the top air inlet 23 is used to connect to another air source. When the gas injected into the top of the top air inlet 23 passes through the throat, it generates suction and draws the air source in through the interface. The airflow forms turbulence in the pipeline, which fully disperses the small agglomerates of rice husk powder, laying the foundation for subsequent dispersion. After the powdered rice husk particles are discharged from the top air inlet 23 and the air guide port 25, they fall onto the material distribution plate 35. The material distribution plate 35 is driven by the drive motor 31 and the motor gear 32, which allows the powder falling into the material distribution plate 35 to rotate and be evenly dispersed inside the boiler shell 1.

[0032] 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 gasification combustion boiler, comprising a boiler shell (1), characterized in that: Also includes: A pneumatic feeding mechanism (2) is located at the top of the boiler shell (1). The pneumatic feeding mechanism (2) includes a transversely distributed main conveying pipe (21). The top end of the main conveying pipe (21) is connected to a discharge pipe (24). The discharge pipe (24) passes through the center of the top of the boiler shell (1). A screw feeder (22) for conveying materials is installed at one end of the main conveying pipe (21) away from the discharge pipe (24). A feed hopper is connected at the top of the main conveying pipe (21) and at the end near the screw feeder (22). A top air inlet (23) is provided at the top of the discharge pipe (24). The middle part of the discharge pipe (24) is funnel-shaped, and an interface for connecting pipes is provided at its throat. The bulk material mechanism (3) is located directly below the discharge pipe (24). The bulk material mechanism (3) includes a bearing disc (33) fixed to the inner wall of the boiler shell (1), and a bulk material disc (35) is rotatably connected to the inner wall of the bearing disc (33).

2. The biomass gasification combustion boiler according to claim 1, characterized in that: The bottom of the discharge pipe (24) is fixedly connected to an air duct (25).

3. A biomass gasification combustion boiler according to claim 1, characterized in that: The bulk material mechanism (3) includes a drive motor (31) for driving the bulk material tray (35) to rotate. A motor gear (32) is provided on the movable end of the drive motor (31). A top bevel tooth (34) is provided on the top of the bulk material tray (35). The top bevel tooth (34) meshes with the motor gear (32).

4. A biomass gasification combustion boiler according to claim 2, characterized in that: The outer wall of the top air inlet (23) is provided with a branch pipe and connected to a distribution pipe (27). The other end of the distribution pipe (27) is connected to a bottom air outlet pipe (26). The bottom air outlet pipe (26) is installed at the bottom of the main conveying pipe (21).

5. A biomass gasification combustion boiler according to claim 4, characterized in that: The top of the bottom air outlet pipe (26) is provided with several strip-shaped slots for exhaust.

6. A biomass gasification combustion boiler according to claim 1, characterized in that: The spiral feeder (22) includes a threaded rod and a motor that drives the threaded rod to rotate.

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