Multi-column tube energy-saving and environment-friendly biomass particle hot blast stove

Abstract

This utility model relates to the technical field of hot air furnaces, and in particular to a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace, which improves heat exchange efficiency and energy-saving and environmental protection effects by setting two sets of horizontally arranged multi-tubes; it includes a furnace body; it also includes an air inlet box, multiple lower heating pipes, a rear air box, multiple upper heating pipes, and a combustion mechanism. The input end of the air inlet box is connected to the output end of the blower, and the output end of the air inlet box extends into the bottom of one side of the combustion chamber of the furnace body. The input ends of the multiple lower heating pipes are connected to the output ends of the air inlet box, and the output ends of the multiple lower heating pipes are connected to the input ends of the rear air box. The rear air box is installed on the other side of the combustion chamber of the furnace body. The multiple lower heating pipes pass through the combustion mechanism. The input ends of the multiple upper heating pipes are connected to the output ends of the rear air box, and the output ends of the multiple upper heating pipes are connected to the input ends of the air outlet box. The multiple upper heating pipes are located above the multiple lower heating pipes, and the output end of the air outlet box extends outward from the top of the furnace body.

Description

Technical Field

[0001] This utility model relates to the technical field of hot air furnaces, and in particular to a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace. Background Technology

[0002] A biomass hot air furnace is a boiler that uses biomass pellets as fuel. Multiple rows of tubes are installed inside the furnace body to increase the heat exchange area and improve the efficiency of the hot air furnace. Chinese utility model patent CN222895311U discloses an improved biomass hot air furnace. This furnace includes a hot air furnace, a door, a partition, a hopper, a feed pipe, a fixing plate, and an airflow duct. A door is rotatably mounted on one side of the furnace, and a partition is rotatably mounted on the top. A hopper is fixedly connected to the top of the furnace, and a feed pipe is fixedly connected to the bottom of the hopper. The feed pipe connects to and communicates with the hot air furnace. A fixing plate is fixedly mounted inside the furnace, and an airflow duct runs through the furnace. By pulling out the stacking frame, fuel residue falling into the frame will fall into a collection box. Pulling out the stacking frame makes it easier to clean areas that are otherwise difficult to clean, achieving a completely clean result.

[0003] However, its air duct for heat exchange is vertically positioned and located above the combustion mechanism, which causes the air inside to rise rapidly after being heated and have a short contact time with the heat generated by the combustion of biomass pellets, resulting in low thermal efficiency and insufficient energy saving and environmental protection. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace that improves heat exchange efficiency and energy-saving and environmental protection effects by setting two sets of horizontally arranged multi-tubes.

[0005] This utility model discloses a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace, comprising a furnace body and a blower. The furnace body has an internal combustion chamber, and the blower is installed outside the furnace body. It also includes an air inlet box, multiple lower heating pipes, a rear air box, multiple upper heating pipes, and a combustion mechanism. The input end of the air inlet box is connected to the output end of the blower, and the output end of the air inlet box extends into the bottom of one side of the combustion chamber of the furnace body. The input ends of the multiple lower heating pipes are connected to the output ends of the air inlet box, and the output ends of the multiple lower heating pipes are connected to the input ends of the rear air box. The rear air box is installed on the other side of the combustion chamber of the furnace body. The multiple lower heating pipes pass through the combustion mechanism. The input ends of the multiple upper heating pipes are connected to the output ends of the rear air box, and the output ends of the multiple upper heating pipes are connected to the input ends of the air outlet box. The multiple upper heating pipes are located above the multiple lower heating pipes, and the output end of the air outlet box extends outside the top of the furnace body. During operation, the combustion mechanism burns biomass pellets... The particulate fuel is ignited and continuously combusted under the control of the matching braking control system to generate heat. The blower accelerates the air, which then passes sequentially through the air inlet box, multiple lower heating pipes, the rear air box, multiple upper heating pipes, and the air outlet box, and is then transported to the subsequent heat-using units through the air outlet box. When the air passes through the multiple lower heating pipes, the pipes directly contact the combustion mechanism, allowing the heat generated by the combustion flame to directly heat the internal air through the pipes, achieving the first heating. When the air passes through the multiple upper heating pipes, the pipes come into contact with the hot air and thermal radiation generated by the combustion, resulting in a second heating of the air inside the pipes. Furthermore, the multiple lower and upper heating pipes form a multi-tube structure, increasing the contact area between the air and heat. The horizontal placement of the multiple lower and upper heating pipes also prolongs the contact time between the air and heat, improving thermal efficiency and energy-saving and environmental protection effects.

[0006] Preferably, the combustion mechanism includes a combustion hopper and a refractory baffle. The combustion hopper is installed below the middle of multiple lower heating pipes, and the refractory baffle surrounds the bottom and outer sides of the multiple lower heating pipes. Biomass pellet fuel is loaded into the combustion hopper, and the combustion hopper is equipped with an ignition device and other supporting systems for igniting the biomass pellet fuel. The refractory baffle surrounds the bottom and sides of the multiple lower heating pipes, so that the multiple lower heating pipes pass through the groove-shaped combustion space formed by the refractory baffle, and the flame is confined in this combustion space, thereby improving the thermal efficiency of the multiple lower heating pipes.

[0007] Preferably, the furnace also includes a storage hopper, a feeding pipe, and multiple air guide blocks. The storage hopper is installed outside the furnace body, and its output end is connected to the input end of the feeding pipe. The output end of the feeding pipe extends into the combustion chamber of the furnace body and connects to the combustion hopper. An air inlet is provided at the upper end of the feeding pipe, and the air inlet is connected to the bottom air outlet of the air inlet box. Multiple air guide blocks are provided at the bottom of the combustion hopper. Biomass pellet fuel is added to the storage hopper and flows into the feeding pipe. Part of the air delivered by the blower to the air inlet box is delivered to the feeding pipe through the air outlet. This part of the air carries the biomass pellet fuel in the feeding pipe into the combustion hopper. Multiple air guide blocks guide the air and biomass pellet fuel, making the distribution of biomass pellet fuel and air in the combustion hopper more uniform. This achieves simultaneous feeding and air blowing in the combustion hopper, improving combustion efficiency.

[0008] Preferably, it also includes a gate plate, which is rotatably installed inside the feed pipe and located above the air outlet of the feed pipe. The gate plate is driven by a driver, and adjusting the angle of the gate plate adjusts the size of the air outlet of the feed pipe opened by the gate plate, thereby adjusting the air volume supplied to the combustion chamber.

[0009] Preferably, it also includes a second gate, which is rotatably installed in the feeding pipe and located inside the input end of the feeding pipe; the second gate is driven by a driver, and adjusting the angle of the second gate adjusts the opening size of the input end of the feeding pipe, thereby adjusting the speed at which the storage hopper feeds biomass pellet fuel into the feeding pipe.

[0010] Preferably, it also includes a fire-resistant grating plate, which is installed above multiple lower heat pipes; the fire-resistant grating plate is used to block the biomass pellet fuel, preventing unburned biomass pellet fuel from being blown out of the multiple lower heat pipes by the wind, thereby improving thermal efficiency.

[0011] Preferably, it also includes two ash collection troughs, which are located on both sides of multiple lower heat pipes respectively. After the ash is carried by the wind and hot air through the grid holes of the refractory grating, it separates from the rising airflow and falls to the two ash collection troughs on both sides for collection, which facilitates subsequent ash cleaning.

[0012] Preferably, it also includes two gate valves, a driver, and a smoke outlet. Each of the two ash collection troughs has an ash outlet at one end, extending beyond the furnace body. The two gate valves are hinged to the ash outlets of the two ash collection troughs. The driver is mounted on the furnace body, and its output shaft is connected to the two gate valves. The smoke outlet is mounted on the furnace body and communicates with the combustion chamber of the furnace body. The output shaft of the driver drives the two gate valves to rotate, so that when the hot blast stove is working, the two gate valves close the ash outlets of the two ash collection troughs, and when the hot blast stove is cleaning, the two gate valves open the ash outlets of the two ash collection troughs. The smoke outlet is closed using a gate or valve, and the blower operates by introducing air through the feeding pipe. This allows the airflow to pass through the combustion hopper, the combustion chamber of the furnace body, the two ash collection troughs, and the two ash outlets, carrying away the ash and achieving efficient ash removal.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: When air passes through multiple lower heating pipes, the multiple lower heating pipes directly contact the combustion mechanism, so that the heat generated by the combustion flame directly heats the internal air through the multiple lower heating pipes, achieving the first heating. When air passes through multiple upper heating pipes, the multiple upper heating pipes contact the hot air and heat radiation generated by combustion, so that the air inside the multiple upper heating pipes is heated a second time. Moreover, the multiple lower heating pipes and multiple upper heating pipes form a multi-row tube structure, which increases the contact area between air and heat. The horizontal placement of the multiple lower heating pipes and multiple upper heating pipes also prolongs the contact time between air and heat, improving thermal efficiency and energy-saving and environmental protection effects. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the isometric structure of this utility model; Figure 3 This is a side sectional view of the present invention; Figure 4 This is a front sectional view of the present invention; Figure 5 It is a structural diagram of the blower, air inlet box, rear air box, upper heat pipe, air outlet box, storage hopper, feeding pipe, refractory grating and ash collection trough, etc. Figure 6 It is a structural diagram of the blower, air inlet box, lower heat pipe, rear air box, upper heat pipe, air outlet box, combustion hopper, refractory enclosure, storage hopper and feeding pipe, etc. Figure 7 It is a structural diagram of the lower heat pipe, combustion hopper, refractory baffle, storage hopper, feeding pipe and air guide block.

[0015] The following are labeled in the attached diagram: 1. Furnace body; 2. Blower; 3. Air inlet box; 4. Lower heat pipe; 5. Rear air box; 6. Upper heat pipe; 7. Air outlet box; 8. Combustion hopper; 9. Refractory enclosure; 10. Storage hopper; 11. Feeding pipe; 12. Air guide block; 13. Gate 1; 14. Gate 2; 15. Refractory grating; 16. Ash collection trough; 17. Gate 3; 18. Driver 3; 19. Smoke outlet. Detailed Implementation

[0016] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete. Example 1

[0017] like Figures 1 to 5 As shown, a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace includes a furnace body 1 and a blower 2. A combustion chamber is located inside the furnace body 1, and the blower 2 is installed outside the furnace body 1. It also includes an air inlet box 3, multiple lower heating pipes 4, a rear air box 5, multiple upper heating pipes 6, and a combustion mechanism. The input end of the air inlet box 3 is connected to the output end of the blower 2, and the output end of the air inlet box 3 extends into the bottom of one side of the combustion chamber of the furnace body 1. The input ends of the multiple lower heating pipes 4 are connected to the output ends of the air inlet box 3, and the output ends of the multiple lower heating pipes 4 are connected to the input ends of the rear air box 5. The rear air box 5 is installed on the other side of the combustion chamber of the furnace body 1. The multiple lower heating pipes 4 pass through the combustion mechanism, and the input ends of the multiple upper heating pipes 6 are connected to the output ends of the rear air box 5. The output ends of the multiple upper heating pipes 6 are connected to the input ends of the air outlet box 7. Multiple upper heating pipes 6 are located above multiple lower heating pipes 4, and the output end of the air outlet box 7 extends outward from the upper part of the furnace body 1. It also includes a refractory grating plate 15, which is installed above the multiple lower heating pipes 4. It also includes two ash collection troughs 16, which are located on both sides of the multiple lower heating pipes 4. It also includes two gate valves 17, a driver 18, and a smoke outlet 19. Each of the two ash collection troughs 16 has an ash outlet at one end, and the ash outlets of the two ash collection troughs 16 extend outward from the furnace body 1. The two gate valves 17 are respectively hinged to the ash outlets of the two ash collection troughs 16. The driver 18 is installed on the furnace body 1, and the output shaft of the driver 18 is connected to the two gate valves 17. The smoke outlet 19 is installed on the furnace body 1 and communicates with the combustion chamber of the furnace body 1.

[0018] During operation, the combustion mechanism ignites the biomass pellet fuel, and under the control of the matching braking control system, it continuously generates heat through controlled combustion. The blower 2 accelerates the air, which then passes sequentially through the air inlet box 3, multiple lower heating pipes 4, the rear air box 5, multiple upper heating pipes 6, and the air outlet box 7, and is then transported to the subsequent heat-using units through the air outlet box 7. When the air passes through the multiple lower heating pipes 4, the multiple lower heating pipes 4 come into direct contact with the combustion mechanism, allowing the heat generated by the combustion flame to directly heat the internal air through the multiple lower heating pipes 4, achieving the first heating. When the air passes through the multiple upper heating pipes 6, the multiple upper heating pipes 6 come into contact with the hot air and thermal radiation generated by combustion, allowing the air inside the multiple upper heating pipes 6 to be heated a second time. Moreover, the multiple lower heating pipes 4 and multiple upper heating pipes 6 form a multi-tube structure, which increases the contact area between the air and the heat. The horizontal placement of the multiple lower heating pipes 4 and multiple upper heating pipes 6 also prolongs the contact time between the air and the heat, improving thermal efficiency and energy-saving and environmental protection effects.

[0019] The output shaft of the driver 318 drives the two gates 317 to flip, so that when the hot blast stove is working, the two gates 317 close the ash outlets of the two ash collection troughs 16. The refractory grating 15 is used to block the biomass pellet fuel, preventing the unburned biomass pellet fuel from being blown out of the outside of the multiple lower heating pipes 4 by the wind. The ash is carried by the wind and hot air, and after passing through the grid holes of the refractory grating 15, it separates from the rising airflow and falls to the sides into the two ash collection troughs 16 for collection. When the hot blast stove is cleaning, the two gates 317 open the ash outlets of the two ash collection troughs 16, and the smoke outlet 19 is closed by using gates or valves. The blower 2 runs and air is introduced through the feeding pipe 11, so that the air force passes through the combustion hopper 8, the combustion chamber of the furnace body 1, the two ash collection troughs 16 and the two ash outlets and is discharged, and the ash is carried out, achieving efficient ash discharge. Example 2

[0020] like Figures 1 to 4 , Figure 6 and Figure 7 As shown, based on Embodiment 1, the combustion mechanism includes a combustion hopper 8 and a refractory enclosure 9. The combustion hopper 8 is installed below the middle of multiple lower heating pipes 4, and the refractory enclosure 9 surrounds the bottom and outer sides of the multiple lower heating pipes 4. It also includes a storage hopper 10, a feeding pipe 11, and multiple air guide blocks 12. The storage hopper 10 is installed outside the furnace body 1, and the output end of the storage hopper 10 is connected to the input end of the feeding pipe 11. The output end of the feeding pipe 11 extends into the combustion chamber of the furnace body 1 and is connected to the combustion hopper 8. An air inlet is provided at the upper end of the feeding pipe 11, and the air inlet is connected to the bottom air outlet of the air inlet box 3. Multiple air guide blocks 12 are provided at the bottom of the combustion hopper 8. It also includes a gate plate 13, which is rotatably installed inside the feeding pipe 11 and is located above the air outlet of the feeding pipe 11. It also includes a gate plate 14, which is rotatably installed in the feeding pipe 11 and is located inside the input end of the feeding pipe 11.

[0021] The combustion hopper 8 is equipped with an ignition device and other supporting systems for igniting biomass pellet fuel. Biomass pellet fuel is added to the storage hopper 10 and flows into the feeding pipe 11. The gate 13 is driven by a driver, and adjusting the angle of the gate 13 adjusts the size of the air outlet of the feeding pipe 11, thus adjusting the air volume supplied to the combustion hopper 8. A portion of the air supplied by the blower 2 to the air inlet box 3 is then supplied to the feeding pipe 11 through the air outlet. This portion of the air carries the biomass pellet fuel in the feeding pipe 11 into the combustion hopper 8. The gate 2 14 is driven by a driver, and adjusting... The angle of the gate 14 is adjusted to regulate the opening size of the input end of the feed pipe 11, thereby adjusting the speed at which the storage hopper 10 feeds biomass pellet fuel into the feed pipe 11. Multiple air guide blocks 12 guide the air force and biomass pellet fuel, making the biomass pellet fuel and air force more evenly distributed in the combustion hopper 8, achieving feeding while blowing air into the combustion in the combustion hopper 8. The refractory enclosure 9 surrounds the bottom and sides of multiple lower heating pipes 4, so that multiple lower heating pipes 4 pass through the groove-shaped combustion space enclosed by the refractory enclosure 9, and the flame is confined in this combustion space, improving the thermal efficiency of multiple lower heating pipes 4.

[0022] like Figures 1 to 7 As shown, this utility model discloses a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace. During operation, biomass pellet fuel is first added to the storage hopper 10. The biomass pellet fuel flows into the feeding pipe 11. The blower 2 operates to accelerate air and deliver it to the air inlet box 3. Part of the air delivered by the blower 2 to the air inlet box 3 is delivered to the feeding pipe 11 through the air outlet. This part of the air carries the biomass pellet fuel in the feeding pipe 11 into the combustion hopper 8. Then, another part of the air passes through the air inlet box 3, multiple lower heating pipes 4, and the rear air box 5. Multiple upper heating pipes 6 and an air outlet box 7 are connected, and the heat is supplied to subsequent heat-using units through the air outlet box 7. Then, the ignition device ignites the biomass pellet fuel, and under the control of the matching braking control system, it can controllably and continuously burn to generate heat. When the air passes through multiple lower heating pipes 4, the heat generated by the combustion flame directly heats the internal air through multiple lower heating pipes 4, achieving the first heating. Finally, when the air passes through multiple upper heating pipes 6, the multiple upper heating pipes 6 come into contact with the hot air and heat radiation generated by combustion, so that the air inside the multiple upper heating pipes 6 is heated a second time.

[0023] The main functions achieved by this utility model are: 1. The use of two sets of multi-tube structures increases the contact area between air and heat. The horizontal placement of multiple lower heating pipes 4 and multiple upper heating pipes 6 also extends the contact time between air and heat, improving thermal efficiency and energy-saving and environmental protection effects. 2. By performing two heating cycles, heat exchange efficiency is improved; 3. The biomass pellet fuel is automatically fed by blowing airflow from blower 2; 4. Use airflow to blow away the ash for ash removal.

[0024] This utility model discloses a multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace. Its installation, connection, or setting methods are all common mechanical methods, and any method that can achieve its beneficial effects can be implemented. The furnace body 1, blower 2, air inlet box 3, lower heat pipe 4, rear air box 5, upper heat pipe 6, air outlet box 7, combustion hopper 8, storage hopper 10, gate 13, gate 2 14, refractory grating plate 15, gate 3 17, and driver 3 18 of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0025] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace, comprising a furnace body (1) and a blower (2), wherein a combustion chamber is provided inside the furnace body (1), and the blower (2) is installed outside the furnace body (1); characterized in that, It also includes an air inlet box (3), multiple lower heating pipes (4), a rear air box (5), multiple upper heating pipes (6), and a combustion mechanism. The input end of the air inlet box (3) is connected to the output end of the blower (2). The output end of the air inlet box (3) extends into the bottom of one side of the combustion chamber of the furnace body (1). The input ends of multiple lower heating pipes (4) are connected to the output end of the air inlet box (3). The output ends of multiple lower heating pipes (4) are connected to the input end of the rear air box (5). The rear air box (5) is installed on the other side of the combustion chamber of the furnace body (1). Multiple lower heating pipes (4) pass through the combustion mechanism. The input ends of multiple upper heating pipes (6) are connected to the output end of the rear air box (5). The output ends of multiple upper heating pipes (6) are connected to the input end of the air outlet box (7). Multiple upper heating pipes (6) are located above multiple lower heating pipes (4). The output end of the air outlet box (7) extends out of the outside of the furnace body (1).

2. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 1, characterized in that, The combustion mechanism includes a combustion chamber (8) and a refractory enclosure (9). The combustion chamber (8) is installed in the middle of multiple lower heat pipes (4), and the refractory enclosure (9) surrounds the bottom and outer side of the multiple lower heat pipes (4).

3. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 2, characterized in that, It also includes a storage hopper (10), a feeding pipe (11) and multiple air guide blocks (12). The storage hopper (10) is installed outside the furnace body (1). The output end of the storage hopper (10) is connected to the input end of the feeding pipe (11). The output end of the feeding pipe (11) extends into the combustion chamber of the furnace body (1) and is connected to the combustion bucket (8). An air inlet is provided at the upper end of the feeding pipe (11). The air inlet is connected to the bottom air outlet of the air inlet box (3). Multiple air guide blocks (12) are provided at the bottom of the combustion bucket (8).

4. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 3, characterized in that, It also includes a gate (13), which is rotatably installed inside the feed pipe (11) and is located above the air outlet of the feed pipe (11).

5. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 3, characterized in that, It also includes a second gate (14), which is rotatably installed in the feed pipe (11) and is located inside the input end of the feed pipe (11).

6. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 1, characterized in that, It also includes a fire-resistant grating (15), which is installed above multiple lower heat pipes (4).

7. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 1, characterized in that, It also includes ash collection troughs (16), two ash collection troughs (16) are provided, and the two ash collection troughs (16) are located on both sides of multiple lower heat pipes (4).

8. The multi-tube energy-saving and environmentally friendly biomass pellet hot air furnace as described in claim 7, characterized in that, It also includes two gate valves (17), driver valves (18), and a flue gas outlet (19). One end of each of the two ash collection troughs (16) is provided with an ash outlet. The ash outlets of the two ash collection troughs (16) extend out of the furnace body (1). The two gate valves (17) are respectively hinged to the ash outlets of the two ash collection troughs (16). The driver valves (18) are installed on the furnace body (1). The output shaft of the driver valves (18) is connected to the two gate valves (17) in a transmission connection. The flue gas outlet (19) is installed on the furnace body (1) and is connected to the combustion chamber of the furnace body (1).

Images