Horizontal biomass tube furnace

Abstract

This utility model relates to the technical field of biomass stoves, and proposes a horizontal biomass tube furnace, including a body, and further comprising: a furnace body, wherein the furnace body is disposed within the body, and the furnace body has a combustion chamber for the oxidation and combustion of biomass fuel, and a heat output chamber for collecting and outputting the heat energy generated by combustion, the gas outlet of the combustion chamber being connected to the heat output chamber; a feeding mechanism, the feeding mechanism having a discharge port connected to the combustion chamber to transport biomass fuel to the combustion chamber; the feeding mechanism includes a feeding pipe with a central structure, the feeding pipe having an inlet end and a discharge end, the feeding pipe being inclined, the biomass fuel entering the combustion chamber along the inclined feeding pipe, and the inlet end being set at a height higher than the discharge end, so as to block the flame from propagating backward towards the inlet end through the height difference, thereby achieving physical backfire prevention. By setting the feeding pipe at an inclined arrangement, so that the inlet end is higher than the discharge end, the height difference forms a physical backfire prevention structure, improving safety.

Description

Technical Field

[0001] This utility model relates to the technical field of biomass stoves, specifically to a horizontal biomass tube furnace. Background Technology

[0002] Biomass energy, as a renewable and clean energy source, has broad application prospects in both industrial and civilian sectors. The core of biomass combustion equipment lies in achieving efficient and stable combustion of fuel and effectively outputting heat energy. Traditional biomass combustion stoves typically use horizontal or vertical conveying methods to transport biomass fuel to the combustion chamber. However, in actual operation, backfire can easily cause premature combustion of fuel in the conveying pipeline due to reverse flame propagation, potentially leading to safety hazards.

[0003] In the prior art, for example, Chinese Patent Publication No. CN111189074A discloses a biomass stove, which uses a screw conveyor to horizontally push biomass pellets onto the furnace bridge plate for combustion, and utilizes inclined furnace walls and a cooling water tank to prevent fuel sticking. However, this solution has the following shortcomings: Insufficient backfire prevention: The screw conveyor is horizontally arranged, and the combustion chamber is directly connected to the conveying mechanism. The flame may spread backward along the conveying channel to the hopper, posing a safety hazard. Utility Model Content

[0004] This invention proposes a horizontal biomass tube furnace. By setting up an inclined feeding pipe, the feed end is higher than the discharge end, utilizing the height difference to form a physical anti-backfire structure. Compared with existing horizontal feeding methods, this solution can effectively prevent the flame from propagating backward along the feeding pipe to the feeding hopper, improving safety. Furthermore, the inclined feeding structure allows the biomass fuel to slide naturally into the combustion chamber under gravity, reducing the risk of blockage and lowering feeding energy consumption. The heat output chamber is directly connected to the combustion chamber, allowing the high-temperature gases after combustion to quickly enter the heat output chamber, reducing heat loss and improving thermal efficiency. The overall structure is compact and suitable for various biomass fuels, such as pellets and debris, making it more adaptable.

[0005] A horizontal biomass tube furnace designed for this purpose includes a body and further includes: The furnace body is located inside the machine body. The furnace body is provided with a combustion chamber for the oxidation and combustion of biomass fuel, and a heat energy output chamber for collecting and outputting the heat energy generated by combustion. The gas outlet of the combustion chamber is connected to the heat energy output chamber. A feeding mechanism, wherein the discharge port of the feeding mechanism is connected to the combustion chamber to transport biomass fuel to the combustion chamber; The feeding mechanism includes a feeding pipe with a central structure, which has an inlet end and an outlet end. The feeding pipe is arranged at an inclination, and the biomass fuel enters the combustion chamber along the inclination feeding pipe. The inlet end is set at a higher height than the outlet end, so as to block the flame from propagating in the opposite direction to the inlet end through the height difference, thereby achieving physical backfire prevention.

[0006] A first air supply mechanism is provided between the inner side of the machine body and the outer side of the furnace body, connecting the outside of the machine body, the heat output chamber and the combustion chamber, so as to guide the outside cold air through the outer side of the furnace body to exchange heat with the heat output chamber and enter the combustion chamber. The first gas replenishment mechanism includes a first preheating channel and a second flow guiding channel that are spaced apart and connected. Gas enters the combustion chamber through the first preheating channel, the second flow guiding channel and the heat output chamber to extend the gas heat exchange flow path.

[0007] The top of the inner side of the machine body and the top of the outer side of the furnace body are provided with a first partition, and a second partition is provided between the inner side of the machine body and the outer side of the furnace body. The first partition and the second partition form a first preheating channel and a second flow guiding channel that are spaced apart and connected between the inner side of the machine body and the outer side of the furnace body. The top of the machine body is provided with an external air inlet that connects to the outside of the machine body, and the external air inlet is provided with an air filter for filtering the gas. The furnace body's heat output chamber and combustion chamber are arranged vertically, and the top of the furnace body has a heat exchange air inlet that connects the heat output chamber and combustion chamber sequentially from top to bottom.

[0008] The heat output chamber and the combustion chamber are arranged vertically along the height of the furnace body. The combustion chamber is provided with a first gas inlet at the top of the first end, which connects the second flow channel and the heat output chamber. The gas entering the second flow channel passes through the heat output chamber and enters the combustion chamber through the first gas inlet. The first air replenishment inlet is located close to the discharge port of the conveying mechanism and above the discharge port of the conveying mechanism.

[0009] The inner side of the furnace body and the outer side of the combustion chamber are provided with several annular partitions at intervals at the first gas inlet, so that the first gas inlet is provided with several gas delivery channels at intervals, and the gas flows into the combustion chamber in a dispersed manner along the several gas delivery channels of the first gas inlet. The inner side of the annular separator is provided with several gas conveying fixing components, which are arranged in a ring-shaped interval along the inner side of the annular separator, and the fixing components extend radially along the length of the furnace body. The fixing components are provided with several gas outlet holes. The combustion chamber has a heat energy outlet at the top of the second end that is connected to the heat energy input end of the heat energy output chamber and is far away from the first air injection port.

[0010] The heat output chamber is provided with a heat output channel that meanders up and down, including a vent pipe assembly, a first chamber and a second chamber; The ventilation pipe group is provided in several ways. The ventilation pipe groups are distributed vertically at intervals along the height of the furnace body. Each ventilation pipe group consists of multiple ventilation pipes arranged along the width of the furnace body. The first cavity is provided in several parts, and the several first cavities are located on one side of the furnace body and arranged vertically at intervals. Each first cavity is independently connected to the first end of the corresponding vent pipe group. The second cavity is provided in several parts, and the several second cavities are located on the other side of the furnace body and arranged vertically at intervals. Each second cavity is independently connected to the second end of the corresponding vent pipe group. The first cavity and the second cavity are distributed at intervals along the length of the furnace body, and together with several layers of ventilation pipe groups, they form a heat energy output channel that meanders up and down. The lowest first cavity is used to connect to the heat energy input end of the combustion chamber; The uppermost first cavity is used to form the heat output end of the heat output chamber to export heat energy; External gas passes through several layers of ventilation pipes along the first gas supply mechanism and enters the combustion chamber.

[0011] The machine body is equipped with a blower intake mechanism, and the outlet of the blower intake mechanism is connected to the combustion chamber. The blower intake mechanism includes a blower, and one end of the blower is provided with a connecting pipe forming a second air supply channel, and one end of the connecting pipe is fixedly connected to the outer side of the combustion chamber. An ignition needle extending into the combustion chamber is provided on the outer side of the combustion chamber. The inner peripheral wall of the combustion chamber has a circular structure. Under the action of the blower, the flame in the combustion chamber flows along the circular inner peripheral wall of the combustion chamber to form a spiral flame.

[0012] The feed pipe has an extension section on one side corresponding to the feed end. The opening of the extension section is equipped with a reciprocating movable cover. One end of the movable cover is rotatably connected to the extension section. The movable cover can be rotated to adjust the opening degree of the extension section. When the extension section is in the open state, a third air supply channel is formed to the combustion chamber.

[0013] The material conveying mechanism also includes a material conveying seat fixedly connected to the inlet end of the material conveying pipe, and a material conveying hopper fixedly connected to the material conveying seat and used to hold biomass fuel; The material conveying seat is equipped with a rotating discharge component located below the outlet end of the material conveying hopper. The discharge component has several spaced-apart pusher blocks. During the rotation of the discharge component, the material is pushed into the material conveying pipe through the pusher blocks. A motor connected to the discharge component is installed on the outside of the material conveying base; The hopper is equipped with a rotating, opening and closing cover.

[0014] The outer side of the machine body is equipped with a fan conveying mechanism, and the air intake end of the fan conveying mechanism is connected to the heat energy output chamber. The fan conveying mechanism includes a housing, a first connecting pipe and a second connecting pipe, with the first ends of the first connecting pipe and the second connecting pipe fixedly installed in the housing; the second end of the first connecting pipe is provided with a volute, and the volute is provided with a third connecting pipe that is connected to the heat output end of the heat output chamber. The volute is also equipped with a blower, and the blower’s air inlet is correspondingly set with the third connecting pipe. The heat energy of the heat energy output chamber is output through the blower, the first connecting pipe and the third connecting pipe. The outer side of the machine body is provided with a furnace door for opening and closing the combustion chamber, and the furnace door is rotatably mounted on the outer side of the machine body.

[0015] The beneficial technical effects of this utility model are as follows: By using an inclined conveying pipe, the feed end is positioned higher than the discharge end, creating a physical backfire prevention structure based on the height difference. Compared to existing horizontal conveying methods, this solution effectively prevents flames from propagating backward along the conveying pipe to the hopper, improving safety. Furthermore, the inclined conveying structure allows biomass fuel to slide naturally into the combustion chamber under gravity, reducing the risk of blockage and lowering conveying energy consumption. The heat output chamber is directly connected to the combustion chamber, allowing high-temperature gases from combustion to quickly enter the heat output chamber, reducing heat loss and improving thermal efficiency. The overall structure is compact and suitable for various biomass fuels, such as pellets and debris, offering greater adaptability.

[0016] The heat output chamber is equipped with a meandering heat output channel. The ventilation pipe group, the first chamber and the second chamber in the heat output chamber constitute a meandering heat output channel, which allows the high-temperature flue gas to flow back and forth in the chamber multiple times, extending the output path of the high-temperature flue gas, avoiding direct emission of high-temperature gas, increasing the heat exchange area and improving the heat exchange efficiency.

[0017] The multi-layer ventilation pipe group is arranged at intervals, and the cold air passes through the multi-layer ventilation pipe group in sequence, which further increases the heat exchange area and allows the cold air to fully absorb heat when it flows through.

[0018] The combustion chamber is equipped with an air supply structure to ensure complete combustion. One of the air supply structures is a blower intake mechanism, which includes a blower. The blower's inlet and outlet are connected to the combustion chamber. The inner peripheral wall of the combustion chamber has a circular structure. Under the action of the blower, the flame in the combustion chamber flows along the circular inner peripheral wall of the combustion chamber to form a spiral flame. The blower drives the airflow to move the flame in the combustion chamber, resulting in more complete combustion. Attached Figure Description

[0019] Figure 1This is a three-dimensional structural diagram of a horizontal biomass tube furnace according to an embodiment of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of a horizontal biomass tube furnace according to an embodiment of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of a compartment cover that rotates and opens according to an embodiment of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of an embodiment of the present invention with the movable cover in a closed state.

[0023] Figure 5 This is a three-dimensional structural diagram of an embodiment of the present invention with the movable cover in the open state.

[0024] Figure 6 This is a schematic diagram of the internal structure of the furnace body according to an embodiment of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the connection between the material discharge component and the motor drive in one embodiment of the present invention.

[0026] Figure 8 This is a schematic diagram of the air intake path of the first air replenishment mechanism in an embodiment of the present invention.

[0027] Figure 9 This is a schematic diagram of the conveying path of a fan conveying mechanism according to an embodiment of the present invention.

[0028] Figure 10 This is a schematic diagram of the gas delivery path inside the furnace body according to an embodiment of the present invention. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. In order to make the above-mentioned objects, features and advantages of the present application more apparent and understandable, many specific details are set forth in the following description in order to provide a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0030] See Figures 1-10 A horizontal biomass tube furnace, comprising a body 1, and further comprising: Furnace body 2 is located inside the machine body 1. Furnace body 2 is provided with a combustion chamber 201 for the oxidation and combustion of biomass fuel and a heat energy output chamber 202 for collecting and outputting the heat energy generated by combustion. The gas outlet of combustion chamber 201 is connected to heat energy output chamber 202. The material conveying mechanism 3 has its outlet connected to the combustion chamber 201 to convey biomass fuel to the combustion chamber 201; The feeding mechanism 3 includes a feeding pipe 301 with a central structure. The feeding pipe 301 has an inlet end 302 and an outlet end 303. The feeding pipe 301 is arranged at an inclination. Biomass fuel enters the combustion chamber 201 along the inclination feeding pipe 301. The inlet end 302 is set at a higher height than the outlet end 303 so as to block the flame from propagating in the opposite direction to the inlet end 302 through the height difference, thereby achieving physical backfire prevention.

[0031] By setting an inclined conveying pipe 301, the feed end 302 is higher than the discharge end 303, forming a physical backfire prevention structure using the height difference. Compared to existing horizontal conveying methods, this solution effectively prevents flames from propagating backward along the conveying pipe 301 to the conveying hopper 307, improving safety. Furthermore, the inclined conveying structure allows biomass fuel to slide naturally into the combustion chamber 201 under gravity, reducing the risk of blockage and lowering conveying energy consumption. The heat output chamber 202 is directly connected to the combustion chamber 201, allowing the high-temperature gases after combustion to quickly enter the heat output chamber 202, reducing heat loss and improving thermal efficiency. The overall structure is compact and suitable for various biomass fuels, such as pellets and debris, offering greater adaptability.

[0032] A first air supply mechanism 4 is provided between the inner side of the machine body 1 and the outer side of the furnace body 2, connecting the outside of the machine body 1, the heat output chamber 202 and the combustion chamber 201, so as to guide the outside cold air through the outer side of the furnace body 2 to exchange heat with the heat output chamber 202 and enter the combustion chamber 201. The first gas replenishment mechanism 4 includes a first preheating channel 401 and a second flow guiding channel 402 that are spaced apart and connected. Gas enters the combustion chamber 201 through the first preheating channel 401, the second flow guiding channel 402 and the heat output chamber 202 to extend the gas heat exchange flow path.

[0033] The first air replenishment mechanism 4, through the establishment of a first preheating channel 401 and a second guide channel 402, allows outside cold air to first flow through the outside of the furnace body 2 for preliminary preheating, then enter the heat output chamber 202 for further heating, and finally enter the combustion chamber 201 to participate in combustion. This multi-stage preheating method significantly increases the intake air temperature, reduces heat loss during combustion, and makes combustion more complete. At the same time, extending the gas flow path enhances the heat exchange effect and improves the thermal energy utilization rate. This scheme optimizes the air replenishment preheating path, making combustion more stable and reducing the risk of incomplete fuel combustion.

[0034] The top inner side of the machine body 1 and the top outer side of the furnace body 2 are provided with a first partition 5, and a second partition 6 is provided between the inner side of the machine body 1 and the outer side of the furnace body 2. The first partition 5 and the second partition 6 form a first preheating channel 401 and a second guide channel 402 that are spaced apart and connected between the inner side of the machine body 1 and the outer side of the furnace body 2. The top of the body 1 is provided with an external air inlet that connects to the outside of the body 1, and the external air inlet is provided with an air inlet filter 7 for filtering gas. The heat output chamber 202 and the combustion chamber 201 of the furnace body 2 are arranged vertically, and the top of the furnace body 2 is provided with a heat exchange air inlet 203 that connects the heat output chamber 202 and the combustion chamber 201 from top to bottom.

[0035] The first partition 5 and the second partition 6 form an independent but interconnected first preheating channel 401 and a second guide channel 402 between the inner side of the machine body 1 and the outer side of the furnace body 2, ensuring that the airflow follows a predetermined path. An air inlet filter 7 is installed at the external air inlet to filter impurities in the air and prevent dust from entering the combustion chamber 201 and affecting combustion efficiency. The heat output chamber 202 and the combustion chamber 201 are arranged vertically and horizontally, with high-temperature flue gas flowing from bottom to top, conforming to the natural upward flow of hot air and improving heat recovery efficiency. The heat exchange inlet 203 allows gas to pass through the heat output chamber 202 into the combustion chamber 201.

[0036] The heat output chamber 202 and the combustion chamber 201 are arranged vertically along the height of the furnace body 2. The combustion chamber 201 is provided with a first gas inlet 204 at the top of the first end, which connects the second flow channel 402 and the heat output chamber 202. The gas entering the second flow channel 402 passes through the heat output chamber 202 and enters the combustion chamber 201 along the first gas inlet 204. The first air inlet 204 is located close to the outlet of the conveying mechanism 3 and above the outlet of the conveying mechanism 3.

[0037] The combustion chamber 201 and the heat output chamber 202 are arranged vertically. The first supplementary air inlet 204 is located above the discharge port of the material conveying mechanism 3, allowing the preheated air to directly act on the combustion zone, enhancing combustion efficiency. The annular separator 205 and the air conveying fixing component 206 disperse the airflow into the combustion chamber 201, avoiding local oxygen deficiency or uneven combustion. Multiple air outlets 2061 ensure more uniform air distribution, guaranteeing complete combustion of biomass fuel. The heat output port 207 is located away from the first supplementary air inlet 204, ensuring that the first supplementary air inlet 204 and the heat output port 207 do not interfere with or affect each other.

[0038] The inner side of the furnace body 2 and the outer side of the combustion chamber 201 are provided with a number of annular separators 205 at intervals at the first gas inlet 204, so that the first gas inlet 204 is provided with a number of gas delivery channels at intervals, and the gas flows into the combustion chamber 201 in a dispersed manner along the number of gas delivery channels of the first gas inlet 204. The inner side of the annular separator 205 is provided with a plurality of gas conveying fixing members 206, which are arranged in annular intervals along the inner side of the annular separator 205, and the fixing members 206 extend radially along the length of the furnace body 2. The fixing members 206 are provided with a plurality of gas outlet holes 2061. The combustion chamber 201 has a heat energy outlet 207 at the top of the second end, which is connected to the heat energy input end of the heat energy output chamber 202 and is far away from the first supplementary air input port 204.

[0039] The ventilation pipe assembly 208, the first chamber 209, and the second chamber 210 within the heat output chamber 202 form a circuitous and reversible heat output channel. This allows the high-temperature flue gas to flow back and forth multiple times within the chamber, extending the output path and preventing direct emission of the high-temperature gas. This also increases the heat exchange area and improves heat exchange efficiency. The multi-layer ventilation pipe assembly 208 is arranged vertically at intervals, allowing cold air to pass through it sequentially, further increasing the heat exchange area and ensuring that the cold air fully absorbs heat as it flows through.

[0040] The heat output chamber 202 is provided with a heat output channel that meanders up and down, including a vent pipe group 208, a first chamber 209 and a second chamber 210. The ventilation pipe group 208 is provided in several ways. The ventilation pipe group 208 is distributed vertically at intervals along the height of the furnace body 2. Each ventilation pipe group 208 is composed of multiple ventilation pipes arranged along the width of the furnace body 2. The first cavity 209 is provided in a plurality of them. The plurality of first cavities 209 are located on one side of the furnace body 2 and are arranged vertically at intervals. Each first cavity 209 is independently connected to the first end of the corresponding vent pipe group 208. The second cavity 210 is provided in several parts, and the several second cavities 210 are located on the other side of the furnace body 2 and arranged vertically at intervals. Each second cavity 210 is independently connected to the second end of the corresponding vent pipe group 208. The first cavity 209 and the second cavity 210 are distributed at intervals along the length of the furnace body, and together with several layers of ventilation pipe groups 208, they form a heat energy output channel that meanders up and down. The lowest layer first cavity 209 is used to connect to the heat energy input end of the combustion chamber 201; The uppermost first cavity 209 is used to form the heat output end of the heat output chamber 202 to export heat energy; External gas passes through several layers of ventilation pipe groups 208 along the first gas supply mechanism 4 and enters the combustion chamber 201.

[0041] The body 1 is equipped with a blower intake mechanism, and the outlet of the blower intake mechanism is connected to the combustion chamber 201. The blower intake mechanism includes a blower 8, and a connecting pipe 801 forming a second air supply channel is provided at one end of the blower 8. One end of the connecting pipe 801 is fixedly connected to the outside of the combustion chamber 201. An ignition needle 211 is provided on the outside of the combustion chamber 201 and extends into the combustion chamber 201; The inner peripheral wall of the combustion chamber 201 has a circular structure. Under the action of the blower 8, the flame in the combustion chamber 201 flows along the circular inner peripheral wall of the combustion chamber 201 to form a spiral flame.

[0042] The air intake mechanism uses a blower 8 to force airflow, increasing the oxygen concentration in the combustion chamber 201 and ensuring more complete combustion of biomass fuel. A connecting pipe 801 is fixedly connected to the combustion chamber 201 to ensure stable airflow and prevent air leakage from affecting combustion efficiency. An ignition needle 211 extends into the combustion chamber 201 to directly ignite the fuel, improving the ignition success rate. Compared to fuel injection ignition, this solution uses electric ignition, which is simpler to operate and requires no additional fuel, reducing operating costs.

[0043] The feed pipe 301 is provided with an extension section 305 on one side corresponding to the feed end 302. The opening of the extension section is provided with a reciprocating movable cover 304. One end of the movable cover 304 is rotatably connected to the extension section 305. The movable cover 304 can be rotated to adjust the opening of the extension section 305. When the opening of the extension section 305 is in the open state, a third air supply channel is formed for the combustion chamber 201.

[0044] The extension section 305 of the feed pipe 301 is equipped with a movable cover 304, which allows for adjustment of the opening degree of the extension section 305. When the movable cover 304 swings, it forms a third air supply channel to supplement the air required for combustion and prevent fuel accumulation that could lead to incomplete combustion.

[0045] The material conveying mechanism 3 also includes a material conveying seat 306 fixedly connected to the inlet end 302 of the material conveying pipe 301, and a material conveying hopper 307 fixedly connected to the material conveying seat 306 and used to hold biomass fuel; The material conveying base 306 is equipped with a rotating discharge component 308. The discharge component 308 is located below the outlet end of the material conveying hopper 307. The discharge component 308 is equipped with several spaced-apart pusher blocks 309. During the rotation of the discharge component 308, the material is pushed into the material conveying pipe 301 through the pusher blocks 309. A motor 310, which is connected to the discharge component 308, is provided on the outside of the material conveying base 306. The hopper 307 is equipped with a rotating and opening cover 311.

[0046] The feeding seat 306 cooperates with the feeding hopper 307 to ensure that biomass fuel enters the feeding pipe 301 evenly. The discharge component 308 intermittently pushes fuel through the pusher block 309 to avoid excessive feeding and incomplete combustion. The motor 310 drives the discharge component 308 to rotate, and the conveying speed is adjustable. The silo cover 311 prevents external impurities from entering the feeding hopper 307, ensuring fuel purity. When the silo cover 311 is open, biomass fuel can be added to the feeding hopper 307.

[0047] The outer side of the body 1 is provided with a fan conveying mechanism 9, and the air intake end of the fan conveying mechanism 9 is connected to the heat energy output chamber 202. The fan conveying mechanism 9 includes a housing 901, a first connecting pipe 902 and a second connecting pipe 903. The first ends of the first connecting pipe 902 and the second connecting pipe 903 are fixedly installed inside the housing 901. The second end of the first connecting pipe 902 is provided with a volute 904. The volute 904 is provided with a third connecting pipe 905 that is connected to the heat output end of the heat output chamber 202. The volute 904 is also provided with a blower 906, and the air inlet of the blower 906 is correspondingly arranged with the third connecting pipe 905. The heat energy of the heat energy output chamber 202 is output through the blower 906, the first connecting pipe 902 and the third connecting pipe 905. The outer side of the machine body 1 is provided with a furnace door 101 for opening and closing the combustion chamber 201, and the furnace door 101 is rotatably mounted on the outer side of the machine body 1.

[0048] The discharge component 308 is rotatably mounted in the conveying base 306 via a rotating shaft and bearings. One end of the rotating shaft is provided with a driven gear. The drive shaft of the motor 310 is provided with a drive gear that meshes with the driven gear to drive the discharge component 308 to rotate within the conveying base 306.

[0049] The fan conveying mechanism 9, through the volute 904 and the blower 906, efficiently delivers the heat energy from the heat output chamber 202 to external equipment, improving heat energy utilization. The first connecting pipe 902 and the second connecting pipe 903 form a stable airflow channel, reducing heat loss. The furnace door 101 facilitates cleaning of ash and slag from the combustion chamber 201, making maintenance more convenient. Compared to passive flue gas extraction, this solution actively delivers heat energy, making it more widely applicable.

[0050] The above-mentioned fixing method uses connecting flanges, fixing screws, etc. to fix the connection, which is the prior art, so the specific embodiments described above will not be described in detail.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A horizontal biomass tube furnace, comprising a body (1), characterized in that, Also includes: Furnace body (2), the furnace body (2) is located inside the machine body (1), the furnace body (2) is provided with a combustion chamber (201) for the oxidation combustion of biomass fuel and a heat energy output chamber (202) for collecting and outputting the heat energy generated by combustion, the gas outlet of the combustion chamber (201) is connected to the heat energy output chamber (202); The material conveying mechanism (3) has a discharge port connected to the combustion chamber (201) to convey biomass fuel to the combustion chamber (201). The feeding mechanism (3) includes a feeding pipe (301) with a central structure. The feeding pipe (301) has an inlet end (302) and an outlet end (303). The feeding pipe (301) is arranged at an inclination. Biomass fuel enters the combustion chamber (201) along the inclination feeding pipe (301). The inlet end (302) is set at a higher height than the outlet end (303) so as to block the flame from propagating in the opposite direction to the inlet end (302) through the height difference, thereby achieving physical backfire prevention.

2. The horizontal biomass tube furnace according to claim 1, characterized in that: The inner side of the machine body (1) and the outer side of the furnace body (2) are provided with a first air supply mechanism (4) that connects the outside of the machine body (1), the heat output chamber (202) and the combustion chamber (201) to guide the outside cold air through the outer side of the furnace body (2) to exchange heat with the heat output chamber (202) and enter the combustion chamber (201). The first gas replenishment mechanism (4) includes a first preheating channel (401) and a second flow guiding channel (402) that are spaced apart and connected. Gas enters the combustion chamber (201) through the first preheating channel (401), the second flow guiding channel (402) and the heat output chamber (202) to extend the gas heat exchange flow path.

3. The horizontal biomass tube furnace according to claim 2, characterized in that: The top inner side of the machine body (1) and the top outer side of the furnace body (2) are provided with a first partition (5), and a second partition (6) is provided between the inner side of the machine body (1) and the outer side of the furnace body (2). The first partition (5) and the second partition (6) form a first preheating channel (401) and a second guide channel (402) that are spaced apart and connected between the inner side of the machine body (1) and the outer side of the furnace body (2). The top of the body (1) is provided with an external air inlet that connects to the outside of the body (1), and the external air inlet is provided with an air filter (7) for filtering gas. The furnace body (2) has a heat output chamber (202) and a combustion chamber (201) arranged vertically. The top of the furnace body (2) has a heat exchange inlet (203) that connects the heat output chamber (202) and the combustion chamber (201) from top to bottom.

4. The horizontal biomass tube furnace according to claim 2, characterized in that: The heat output chamber (202) and the combustion chamber (201) are arranged vertically along the height of the furnace body (2); The combustion chamber (201) has a first gas inlet (204) at the top of the first end, which connects the second flow channel (402) and the heat output chamber (202). The gas entering the second flow channel (402) passes through the heat output chamber (202) and enters the combustion chamber (201) along the first gas inlet (204). The first air inlet (204) is located close to the outlet of the conveying mechanism (3) in the direction of the outlet, and the first air inlet (204) is located above the outlet of the conveying mechanism (3).

5. The horizontal biomass tube furnace according to claim 4, characterized in that: The furnace body (2) is provided with a number of annular separators (205) at intervals between the inner side and the outer side of the combustion chamber (201) corresponding to the first gas inlet (204), so that the first gas inlet (204) is provided with a number of gas transmission channels at intervals, and the gas flows into the combustion chamber (201) in a dispersed manner along the number of gas transmission channels of the first gas inlet (204). The annular separator (205) has a plurality of gas supply fixing parts (206) on its inner side. The plurality of gas supply fixing parts (206) are arranged in annular intervals along the inner side of the annular separator (205), and the fixing parts (206) extend radially along the length of the furnace body (2). The fixing parts (206) have a plurality of gas outlet holes (2061). The combustion chamber (201) has a heat energy outlet (207) at the top of the second end that is connected to the heat energy input end of the heat energy output chamber (202) and is far away from the first supplementary air input port (204).

6. The horizontal biomass tube furnace according to claim 2, characterized in that: The heat output chamber (202) is provided with a heat output channel that meanders up and down, including a ventilation pipe group (208), a first chamber (209) and a second chamber (210). The ventilation pipe group (208) is provided in several ways. The ventilation pipe group (208) is distributed vertically at intervals along the height of the furnace body (2). Each ventilation pipe group (208) is composed of multiple ventilation pipes arranged along the width of the furnace body (2). The first cavity (209) is provided in several parts. The several first cavities (209) are located on one side of the furnace body (2) and are arranged vertically at intervals. Each first cavity (209) is independently connected to the first end of the corresponding ventilation pipe group (208). The second cavity (210) is provided in several parts. The several second cavities (210) are located on the other side of the furnace body (2) and are arranged vertically at intervals. Each second cavity (210) is independently connected to the second end of the corresponding vent pipe group (208). The first cavity (209) and the second cavity (210) are distributed at intervals along the length of the furnace body, and together with several layers of ventilation pipe groups (208), they form a heat energy output channel that meanders up and down; The lowest first cavity (209) is used to connect to the heat input end of the combustion chamber (201); The uppermost first cavity (209) is used to form the heat output end of the heat output chamber (202) to export heat energy; External gas passes through several layers of ventilation pipe groups (208) along the first gas supply mechanism (4) and enters the combustion chamber (201).

7. The horizontal biomass tube furnace according to claim 1, characterized in that: The body (1) is provided with a blower intake mechanism, and the outlet end of the blower intake mechanism is connected to the combustion chamber (201). The blower intake mechanism includes a blower (8), and a connecting pipe (801) forming a second air supply channel is provided at one end of the blower (8). One end of the connecting pipe (801) is fixedly connected to the outside of the combustion chamber (201). An ignition needle (211) extending into the combustion chamber (201) is provided on the outside of the combustion chamber (201). The inner wall of the combustion chamber (201) has a circular structure. The flame in the combustion chamber (201) flows along the circular inner wall of the combustion chamber (201) under the action of the blower (8) to form a spiral flame.

8. The horizontal biomass tube furnace according to claim 1, characterized in that: The feed pipe (301) is provided with an extension section (305) on one side corresponding to the feed end (302). The opening of the extension section is provided with a reciprocating movable cover (304). One end of the movable cover (304) is rotatably connected to the extension section (305). The movable cover (304) is rotated to adjust the opening degree of the extension section (305). The opening of the extension section (305) is in the open state to form a third air supply channel for the combustion chamber (201).

9. The horizontal biomass tube furnace according to claim 1, characterized in that: The material conveying mechanism (3) also includes a material conveying seat (306) fixedly connected to the feed end (302) of the material conveying pipe (301), and a material conveying hopper (307) fixedly connected to the material conveying seat (306) and used to hold biomass fuel. The material conveying base (306) is equipped with a rotating discharge component (308). The discharge component (308) is located below the outlet end of the material conveying hopper (307). The discharge component (308) is equipped with several spaced pusher blocks (309). During the rotation of the discharge component (308), the material is pushed into the material conveying pipe (301) through the pusher blocks (309). A motor (310) is provided on the outside of the material conveying seat (306) and is connected to the discharge part (308) for transmission. The hopper (307) is equipped with a rotating and opening cover (311).

10. The horizontal biomass tube furnace according to claim 1, characterized in that: The outer side of the body (1) is provided with a fan conveying mechanism (9), and the air intake end of the fan conveying mechanism (9) is connected to the heat energy output chamber (202). The fan conveying mechanism (9) includes a housing (901), a first connecting pipe (902) and a second connecting pipe (903). The first ends of the first connecting pipe (902) and the second connecting pipe (903) are fixedly installed inside the housing (901). The second end of the first connecting pipe (902) is provided with a volute (904), and the volute (904) is provided with a third connecting pipe (905) that is connected to the heat output end of the heat output chamber (202). The volute (904) is also provided with a blower (906), the air inlet of the blower (906) is correspondingly set with the third connecting pipe (905), and the heat energy of the heat energy output chamber (202) is output through the blower (906), the first connecting pipe (902) and the third connecting pipe (905); The outer side of the machine body (1) is provided with a furnace door (101) for opening and closing the combustion chamber (201), and the furnace door (101) is rotatably mounted on the outer side of the machine body (1).

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