High-energy-efficiency biomass boiler

Abstract

The utility model provides a high energy efficiency biomass boiler, which relates to the biomass combustion field, and comprises a combustion furnace, the top of the combustion furnace is fixedly communicated with a heat conduction chamber, the outer surface of the heat conduction chamber is fixedly connected with a support frame, a motor is started, and the motor drives a first transmission shaft to rotate so as to drive an auger conveying frame to convey biomass fuel; a first transmission shaft drives a first gear and a second gear to drive a crushing roller to crush the fuel through transmission of a belt pulley; a second belt pulley drives a second transmission shaft and a transmission crank arm to rotate; the transmission crank arm drives a first rotating block to drive a fire poking device to swing and poke fire in the combustion furnace; an air pump pumps air into an air guide chamber; the transmission crank arm disturbs and guides air to flow, and the heat conduction chamber preheats fuel, so that the humidity can be reduced, extra energy needed for starting is reduced, the boiler starting speed is increased, the problem of slow starting is solved, and the starting performance and the system working efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of biomass combustion technology, and in particular to a high-efficiency biomass boiler. Background Technology

[0002] With the increasing global demand for clean energy, biomass energy is playing an increasingly prominent role in the energy sector due to its renewable nature and relatively low carbon emissions. Biomass boilers, as key equipment for biomass energy conversion and utilization, have been widely used in many fields such as industrial production, heating, and power generation.

[0003] Biomass fuels have a certain degree of moisture content, and the level of moisture content has a significant impact on the combustion process. When the moisture content of biomass fuel is high, a large amount of heat will be used to evaporate the moisture in the initial stage of combustion, making it difficult for the fuel to quickly reach the ignition point and burn stably. This not only leads to slow combustion start-up, but also reduces the flame temperature and heat output during combustion, seriously affecting the thermal efficiency of biomass boilers.

[0004] The existing technology has the following shortcomings:

[0005] The drying process for biomass fuels is insufficient and lacks targeted optimization during combustion. Usually, only a preliminary pre-drying of the fuel is performed, without further adjusting the fuel's moisture state according to the real-time needs during combustion. This fails to effectively solve the problem of combustion instability caused by changes in fuel moisture content.

[0006] The coordination between fuel agitation and air supply during combustion is poor. The ignition action and air supply cannot be flexibly adjusted according to the combustion state of the fuel, resulting in incomplete fuel combustion, uneven combustion in the furnace, and the easy occurrence of local flameout or excessive combustion concentrated in a certain area. This reduces the overall energy efficiency and operational stability of the boiler, and makes it difficult to ensure that biomass fuel can achieve efficient combustion under different humidity conditions. Utility Model Content

[0007] This invention uses a motor to drive a first drive shaft and an auger conveyor to rotate, transporting biomass fuel to a conveying cylinder where it is preheated by a heat conduction chamber. The first drive shaft, via a pulley, drives a first and second gear to crush the fuel with a crushing roller. The second pulley drives a second drive shaft and a transmission crank arm to rotate. The transmission crank arm causes a first rotating block to slide in a chute, driving a ignition device to swing and move the fuel within the combustion furnace. An air pump pumps air into a guide chamber, which is connected to the chute, allowing air to enter the combustion furnace. The transmission crank arm provides a disturbance and guidance effect on airflow, thus solving the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: a high-efficiency biomass boiler, comprising a combustion furnace, a heat conduction chamber fixedly connected to the top of the combustion furnace, a support frame fixedly connected to the outer surface of the heat conduction chamber, a motor fixedly connected to the top of the support frame, a first drive shaft fixedly connected to the output end of the motor, an auger conveyor frame fixedly connected to the outer surface of the first drive shaft, a conveying cylinder sleeved on the outer surface of the auger conveyor frame, the first drive shaft movably inserted into the interior of the conveying cylinder, a crusher shell fixedly connected to the outer surface of the conveying cylinder, and multiple heat transfer holes opened on the outer wall of the conveying cylinder.

[0009] Preferably, a first pulley is fixedly connected to one end of the heat conduction chamber, a transmission belt is driven on the outer wall of the first pulley, a second pulley is driven on the inner wall of the transmission belt, a shaft is fixedly connected to the outer surface of the second pulley, and a first gear is fixedly connected to the outer surface of the shaft. A second gear meshes with the outer wall of the first gear, and a crushing roller is fixedly connected to the outer surfaces of both the first gear and the second gear through the shaft.

[0010] Preferably, a second drive shaft is fixedly connected to the outer surface of the second pulley, a drive crank arm is rotatably connected to the outer surface of the second drive shaft, a shaft is rotatably connected to the outer surface of the drive crank arm, and a first rotating block is fixedly connected to one end of the shaft. The first rotating block is rotatably connected to a fire-starting device via the shaft.

[0011] Preferably, one end of the ignition device is rotatably connected to a second rotating block via a shaft, and the bottom of the second rotating block is fixedly connected to the inner bottom of the combustion furnace.

[0012] Preferably, an air pump is fixedly connected to the outer surface of the combustion furnace, and a sliding groove is formed on the outer wall of the combustion furnace.

[0013] Preferably, the outer surface of the first rotating block and the slide groove are slidably fitted together, and the top of the air pump is fixedly connected to the air guide chamber.

[0014] Preferably, the air guide chamber and the slide groove are interconnected, and the top of the air guide chamber slides against the transmission crank arm through the slot.

[0015] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0016] 1. In this utility model, the starting motor drives the first transmission shaft to rotate, which in turn drives the auger conveyor to transport biomass fuel. The heat conduction chamber preheats the fuel through heat transfer holes. The first transmission shaft drives the first and second gears to crush the fuel via a belt pulley. The second belt pulley drives the second transmission shaft and the transmission crank arm to rotate. The transmission crank arm drives the first rotating block to drive the ignition device to swing and ignite in the combustion furnace. The air pump pumps air into the air guide chamber, which enters the combustion furnace through a chute. The transmission crank arm disturbs and guides the air flow. The preheating of the fuel in the heat conduction chamber can reduce the moisture content, reduce the extra energy required for startup, speed up the boiler startup, solve the problem of slow startup, and improve startup performance and system efficiency.

[0017] 2. In this utility model, an electric motor is used as the power source, and power is transmitted to different components through a reasonable transmission system, reducing the need for additional power devices and reducing energy loss. At the same time, through the coordinated optimization of fuel transportation, crushing, ignition and air supply, the entire combustion process is made more efficient and stable, improving the comprehensive energy utilization efficiency, reducing operating costs, and solving the problems of unreasonable energy utilization and serious energy waste in the prior art. This makes biomass boilers more advantageous in terms of energy utilization and more in line with the requirements of energy conservation and emission reduction. Attached Figure Description

[0018] Figure 1 A three-dimensional view of the main structure of a high-efficiency biomass boiler is provided for this utility model;

[0019] Figure 2 This utility model provides a frontal perspective view of the main structure of a high-efficiency biomass boiler.

[0020] Figure 3 A three-dimensional cross-sectional view of a high-efficiency biomass boiler is provided for this utility model;

[0021] Figure 4 This utility model provides a partial three-dimensional structural view of a high-efficiency biomass boiler;

[0022] Figure 5 A three-dimensional mechanical structure diagram of a high-efficiency biomass boiler is provided for this utility model;

[0023] Figure 6 This utility model presents a bottom-view perspective view of the mechanical structure of a high-efficiency biomass boiler.

[0024] Figure 7 This utility model presents a three-dimensional structural view of some components of a high-efficiency biomass boiler.

[0025] Legend: 1. Combustion furnace; 11. Heat conduction chamber; 12. Support frame; 13. Conveying cylinder; 14. Crusher shell; 15. Heat transfer hole; 2. Motor; 21. First drive shaft; 22. Screw conveyor frame; 23. First pulley; 24. Drive belt; 25. Second pulley; 26. First gear; 27. Second gear; 28. Crushing roller; 29. ​​Second drive shaft; 30. Drive crank arm; 3. Air pump; 31. Air guide chamber; 32. Slide groove; 33. First rotating block; 34. Flame-starting device; 35. Second rotating block. Detailed Implementation

[0026] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0027] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0028] As attached Figure 1 -Appendix Figure 7 As shown, this utility model provides a technical solution: a high-efficiency biomass boiler, including a combustion furnace 1, a heat conduction chamber 11 fixedly connected to the top of the combustion furnace 1, a support frame 12 fixedly connected to the outer surface of the heat conduction chamber 11, a motor 2 fixedly connected to the top of the support frame 12, a first drive shaft 21 fixedly connected to the output end of the motor 2, an auger conveyor frame 22 fixedly connected to the outer surface of the first drive shaft 21, a conveying cylinder 13 sleeved on the outer surface of the auger conveyor frame 22, the first drive shaft 21 movably inserted into the interior of the conveying cylinder 13, a crusher shell 14 fixedly connected to the outer surface of the conveying cylinder 13, and multiple heat transfer holes 15 opened on the outer wall of the conveying cylinder 13. The auger conveyor frame can realize the stable and continuous conveying of biomass fuel, ensuring combustion. The uninterrupted process enhances operational stability, ensuring the long-term stable operation of the entire biomass boiler system and preventing combustion instability or flameout due to fuel supply interruptions. This makes the boiler suitable for industrial production, heating, and other scenarios with high requirements for continuous energy supply. Furthermore, the auger conveyor effectively prevents fuel blockage during transport, as its unique spiral structure propels the fuel forward. Even when handling biomass fuels with a certain viscosity or moisture content, the conveying task can be completed smoothly. Moreover, this conveying method allows for relatively controllable fuel residence time within the conveying cylinder, facilitating full utilization of the heat transfer pores in the cylinder wall for preheating, thereby improving overall energy efficiency.

[0029] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a first pulley 23 is fixedly connected to one end of the heat conduction chamber 11. A transmission belt 24 is sleeved on the outer wall of the first pulley 23. A second pulley 25 is driven by the inner wall of the transmission belt 24. A shaft is fixedly connected to the outer surface of the second pulley 25, and a first gear 26 is fixedly connected to the outer surface of the shaft. A second gear 27 meshes with the outer wall of the first gear 26. Crushing rollers 28 are fixedly connected to the outer surfaces of both the first gear 26 and the second gear 27 via shafts. The gear transmission structure makes the crushing rollers run smoothly and powerfully, which can efficiently crush different fuels, improve combustion efficiency and reduce residue. Through the meshing transmission of the gears, the power of the motor can be stably transmitted. The force is transmitted to the crushing roller, ensuring that the crushing roller does not jam or overload when crushing biomass fuel, thus extending the service life of the crushing equipment. In addition, due to the use of a double gear transmission structure, the force on the crushing roller is more even, and it can withstand a larger load. For some biomass fuels with high hardness, such as hardwood, it can also achieve effective crushing. This uniform crushing can break the fuel into uniformly sized particles, which helps to form a uniform combustion layer during combustion, avoiding uneven combustion caused by uneven fuel particle size, making the combustion process more stable and efficient, reducing harmful substances produced by incomplete combustion, and reducing environmental pollution.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, a second drive shaft 29 is fixedly connected to the outer surface of the second pulley 25. A drive crank arm 30 is rotatably connected to the outer surface of the second drive shaft 29. A shaft is rotatably connected to the outer surface of the drive crank arm 30, and a first rotating block 33 is fixedly connected to one end of the shaft. A ignition device 34 is rotatably connected to the first rotating block 33 via the shaft. The ignition device is driven by the same power source, which reduces equipment cost and failure points and enhances overall reliability. This design not only reduces the complexity and manufacturing cost of the equipment, but also reduces the workload of maintenance, because using fewer power sources means that the probability of failure is relatively low. Moreover, through the coordinated drive of the same power source, the actions of each component are more coordinated and consistent, ensuring the continuity and stability of the entire combustion process. At the same time, this integrated drive method makes the system response faster. When the combustion state changes, the ignition device can quickly make adjustments, improving the boiler's adaptability to different combustion states. This is conducive to maintaining good combustion effect under different operating conditions and improving the overall performance of the biomass boiler.

[0031] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, one end of the ignition device 34 is rotatably connected to a second rotating block 35 via a shaft. The bottom of the second rotating block 35 is fixedly connected to the inner bottom of the combustion furnace 1. The second rotating block provides a stable fulcrum for the ignition device, ensuring that it accurately and effectively turns the fuel and maintains a good combustion environment. It provides a stable support for the ignition device, enabling it to turn the fuel with a fixed trajectory and force when performing the ignition operation. This avoids uneven or incomplete ignition due to unstable support, which helps to form a loose and uniform fuel bed in the combustion furnace, ensuring sufficient contact between fuel and air, preventing incomplete combustion and coking caused by local fuel accumulation, thereby extending the service life of the combustion furnace, reducing the frequency of cleaning the combustion furnace due to coking, and reducing equipment maintenance costs and downtime.

[0032] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, an air pump 3 is fixedly connected to the outer surface of the combustion furnace 1. A groove 32 is opened on the outer wall of the combustion furnace 1. The air pump actively supplies air to ensure sufficient oxygen for combustion, improves the fuel energy conversion rate, and meets the needs of heating and power generation. The air pump can precisely adjust the air supply according to the operating status of the combustion furnace. During the start-up stage, it provides sufficient oxygen to accelerate the ignition and initial combustion of fuel. During the stable combustion stage, it can adjust the air supply according to the combustion intensity to ensure complete combustion of fuel and improve energy conversion efficiency. At the same time, the air pump can also adjust the air supply pressure to allow oxygen to better penetrate to different depths of the fuel bed, so that the fuel can get sufficient oxygen at different levels, avoiding the situation of only burning on the surface and lacking oxygen inside. This further improves the completeness of combustion, increases the heat output of the biomass boiler, and enables the boiler to meet the heating or power generation needs of different scales while reducing the unit energy cost.

[0033] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7As shown, the outer surface of the first rotating block 33 and the slide groove 32 are slidably fitted together. The top of the air pump 3 is fixedly connected to the air guide chamber 31. The cooperation between the first rotating block and the slide groove promotes uniform air distribution, improves the mixing effect of air and fuel, and optimizes combustion. By sliding the first rotating block in the slide groove, the air can be more evenly distributed in different areas when entering the combustion furnace, avoiding local oxygen excess or deficiency, thereby improving the uniformity of combustion. Moreover, this sliding fit structure allows the air to form a relatively stable airflow during the process of entering the combustion furnace, avoiding flame instability caused by airflow turbulence, ensuring the stability and safety of combustion. At the same time, the sliding fit design can also reduce the pressure loss of air during the process of entering the combustion furnace, improve the air supply efficiency of the air pump, make the energy of the air pump more effectively utilized, and reduce the overall energy consumption of the system.

[0034] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the air guide chamber 31 and the chute 32 are interconnected. The top of the air guide chamber 31 slides against the drive crank arm 30 through the chute opening. The drive crank arm disturbs the air in the air guide chamber, refines the airflow, promotes mixing with fuel, and improves the boiler's energy efficiency ratio and performance. During rotation, the drive crank arm disturbs the air in the air guide chamber, making the airflow finer. This finer airflow can better mix with fuel particles, increase the contact area between oxygen and fuel, accelerate the combustion reaction speed, and improve combustion efficiency. Moreover, due to the disturbance effect of the drive crank arm, the airflow in the air guide chamber is more complex and complete, which helps to improve oxygen utilization efficiency and reduces the risk of incomplete combustion of some fuel due to air short circuits. This improves the energy efficiency ratio of the biomass boiler, while also reducing exhaust emissions, making it more environmentally friendly, meeting the requirements of energy conservation and emission reduction, and enhancing the competitiveness of biomass boilers in the market.

[0035] When motor 2 is started, its output drives the first drive shaft 21 to rotate. The auger conveyor frame 22 on the first drive shaft 21 rotates accordingly. Biomass fuel is placed inside the conveying drum 13. The rotation of the auger conveyor frame 22 conveys the biomass fuel towards the crusher casing 14. During this conveying process, heat from the heat conduction chamber 11 is transferred to the biomass fuel through heat transfer holes 15 on the outer wall of the conveying drum 13, providing initial preheating. This helps reduce the fuel's moisture content and makes it easier to crush and burn. The rotation of the first drive shaft 21 is transmitted through the first pulley 23... The transmission belt 24 and the second pulley 25 drive the shaft and the first gear 26 on the shaft to rotate. The second gear 27, which meshes with the first gear 26, also rotates. This causes the crushing roller 28, which is fixedly connected to the outer surfaces of the first gear 26 and the second gear 27, to begin crushing the biomass fuel conveyed into the crusher housing 14, breaking larger pieces of biomass fuel into smaller particles to increase the contact area between the fuel and air and improve combustion efficiency. Simultaneously, the second pulley 25 drives the second transmission shaft 29 to rotate, and the transmission roller 28 on the second transmission shaft 29... The movable crank arm 30 begins to rotate. The rotation of the crank arm 30 drives the first rotating block 33 to slide within the groove 32 on the outer wall of the combustion furnace 1 via a shaft. Since the first rotating block 33 is shaft-connected to the ignition device 34, and the other end of the ignition device 34 is fixedly connected to the bottom of the combustion furnace 1 via a second rotating block 35, the ignition device 34 will swing within the combustion furnace 1, agitating the biomass fuel within the combustion furnace 1. This makes the fuel distribution more even during combustion, improves the mixing effect of fuel and air, and promotes complete combustion. The air pump 3 outside the combustion furnace 1 then operates. Air is pumped into the air guide chamber 31, which is connected to the slide 32. The air can enter the combustion furnace 1 through the slide 32 to provide sufficient oxygen for combustion. Furthermore, the top of the air guide chamber 31 slides against the drive crank arm 30 through the slot. When the drive crank arm 30 rotates, its movement at the slot of the air guide chamber 31 can cause a certain disturbance and guide effect on the air flow, further optimizing the distribution of air in the combustion furnace 1 and ensuring that the fuel can receive a suitable proportion of oxygen supply in each combustion stage, thereby improving the combustion efficiency and thermal energy utilization rate of the entire biomass boiler.

[0036] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. A high-efficiency biomass boiler structure, characterized by: The utility model provides a kind of combustion furnace (1), the top of the combustion furnace (1) is fixedly connected with heat conduction chamber (11), the outer surface of the heat conduction chamber (11) is fixedly connected with support frame (12), the top of the support frame (12) is fixedly connected with motor (2), the output of the motor (2) is fixedly connected with first transmission shaft (21), the outer surface of the first transmission shaft (21) is fixedly connected with auger conveying frame (22), the outer surface of the auger conveying frame (22) is sleeved with conveying cylinder (13), the first transmission shaft (21) is movably inserted conveying cylinder (13) inside, the outer surface of the conveying cylinder (13) is fixedly connected with breaker housing (14), and a plurality of heat transfer holes (15) are formed in the outer wall of the conveying cylinder (13).

2. The high energy efficient biomass boiler structure as claimed in claim 1, wherein: One end of the heat conduction chamber (11) is fixedly connected with first pulley (23), the outer wall of the first pulley (23) is drivingly sleeved with transmission belt (24), the inner wall of the transmission belt (24) is drivingly provided with second pulley (25), the outer surface of the second pulley (25) is fixedly connected with shaft, and the outer surface of the shaft is fixedly connected with first gear (26), the outer wall of the first gear (26) is engaged with second gear (27), and the outer surfaces of the first gear (26) and the second gear (27) are both fixedly connected with breaking stick (28) through shaft.

3. The high-efficiency biomass boiler structure according to claim 2, characterized in that: The outer surface of the second pulley (25) is fixedly connected with second transmission shaft (29), the outer surface of the second transmission shaft (29) is rotatably connected with transmission crank (30), the outer surface of the transmission crank (30) is rotatably connected with shaft, one end of the shaft is fixedly connected with first rotating block (33), and the first rotating block (33) is rotatably connected with fire poking device (34) through shaft.

4. The high-efficiency biomass boiler structure according to claim 3, characterized in that: One end of the fire poking device (34) is rotatably connected with second rotating block (35) through shaft, and the bottom of the second rotating block (35) is fixedly connected with the inner bottom of the combustion furnace (1).

5. The high-efficiency biomass boiler structure according to claim 4, characterized in that: The outer surface of the first rotating block (33) is slidably attached to the chute (32), and the top of the air pump (3) is fixedly connected with air guide chamber (31).

6. The high-efficiency biomass boiler structure according to claim 5, characterized in that: The air guide chamber (31) and the chute (32) are in communication with each other, and the top of the air guide chamber (31) is slidably attached to the transmission crank (30) through the notch.

7. The high-efficiency biomass boiler structure according to claim 6, characterized in that: ​

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