Straw drying device for biomass fuel

Abstract

The straw drying device for the biomass fuel comprises a drying box and an air heating chamber, an exhaust fan is fixedly arranged in the air heating chamber, an electric heating wire is arranged at the air blowing end of the exhaust fan, the upper end of the air heating chamber is communicated with an air outlet cover through a pipeline, an air inlet is formed in the side of the air heating chamber, and an air outlet is formed in the side of the air heating chamber. A filter plate is clamped outside the air inlet, sliding grooves are formed in the upper side and the lower side of the air heating chamber, sliding rods are fixedly arranged in the sliding grooves, springs are arranged outside the sliding rods in a sleeving mode, sliding blocks are movably arranged on the sliding rods, fixing frames are fixedly arranged on the sides of the sliding blocks, and a conveying box is fixedly arranged in the drying box. According to the technical scheme, the straw drying device for the biomass fuel can make full contact with hot air flow, and drying work on straw particles is completed in a circulating mode.

Description

Technical Field

[0001] This utility model relates to the field of biomass fuel drying technology, and in particular to a straw drying device for biomass fuel. Background Technology

[0002] Crop straw is a byproduct of agricultural production, including the stems, leaves, and ears of various crops such as corn stalks, wheat stalks, and rice stalks. In the past, this straw was often discarded or burned indiscriminately, resulting in resource waste and serious environmental pollution. Processing it into biomass fuel straw pellets is an effective way to recycle resources. However, if the moisture content of biomass straw fuel pellets is too high, the evaporation of moisture during combustion will absorb a large amount of heat. Common straw pellet drying devices use exhaust fans to draw in external airflow, which is then heated by a motor's heating element to dry the placed straw pellets. This method results in the straw pellets sticking together too tightly, lacking proper looseness, and the hot airflow is not easily circulated between the pellets, requiring a significant amount of time for drying. Furthermore, the dusty environment in which straw pellets are produced can easily clog the filter plates, affecting the airflow of the exhaust fan. Therefore, we propose a straw drying device for biomass fuel. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a straw drying device for biomass fuel, thereby resolving the issues raised in the background section.

[0004] This utility model discloses a straw drying device for biomass fuel, comprising a drying chamber and an air heating chamber. An exhaust fan is fixedly installed inside the air heating chamber, and an electric heating wire is installed at the blower end of the exhaust fan. The upper end of the air heating chamber is connected to an air outlet hood via a pipe. An air inlet is provided on the side of the air heating chamber, and a filter plate is engaged with the outside of the air inlet. Sliding grooves are provided on the upper and lower sides of the air heating chamber, and sliding rods are fixedly installed within the sliding grooves. Springs are sleeved on the outside of the sliding rods, and sliders are movably mounted on the sliding rods. A fixing frame is fixedly installed on the side of the sliders. A conveyor box is fixedly installed inside the drying chamber. A motor is installed on the top of the conveyor box, and a spiral conveying blade is provided at the output end of the motor. A feeding hopper is provided at the lower end of the conveyor box, and a conveying pipe is provided at the upper end of the conveyor box.

[0005] In the above scheme, the top of the drying box is provided with a feeding pipe, and the upper end of the feeding pipe is provided with a cover plate.

[0006] In the above scheme, a placement frame is placed on the upper part of the drying box, and a desiccant is placed inside the placement frame.

[0007] In the above scheme, one end of the spring is connected to the inner wall of the groove, and the other end is connected to the side of the slider.

[0008] In the above scheme, the air outlet end of the air hood is equipped with a filter screen.

[0009] In the above scheme, a partition is fixedly installed inside the drying box, and the upper side of the partition is connected to a material conveying pipe.

[0010] In the above scheme, the partition and the side wall of the drying box are fixedly provided with a guide plate, and a guide port is opened on the guide plate.

[0011] The advantages and beneficial effects of this utility model are as follows: This utility model provides a straw drying device for biomass fuel. Through the feeding hopper, partition, guide plate, guide port, placement frame, desiccant, conveying box, motor, spiral conveying blades and conveying pipe, the straw particles can fully contact the hot airflow during the falling process, effectively carrying out the drying work. It can cyclically complete the drying work of straw particles, avoiding water vapor condensing at the top of the drying box, forming streams, and dripping back to the straw particles. The slide groove, slide rod, spring, slider and fixing frame facilitate frequent cleaning of the filter plate by workers, avoiding long-term dust blockage on the filter plate surface, which would cause poor airflow. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Fig. 1 This is a schematic diagram of the structure of this utility model.

[0014] Fig. 2 This is a schematic diagram of the internal structure of this utility model.

[0015] Fig. 3 This is a schematic diagram of the slide bar structure of this utility model.

[0016] In the diagram: 1. Drying oven; 11. Injection pipe; 12. Cover plate; 13. Feeding hopper; 14. Partition plate; 15. Guide plate; 16. Feeding port; 17. Placement frame; 18. Desiccant; 2. Air heating chamber; 21. Air inlet; 23. Slide groove; 24. Slide rod; 25. Spring; 26. Sliding block; 27. Fixing frame; 3. Filter plate; 32. Exhaust fan; 33. Electric heating wire; 34. Pipe; 35. Exhaust hood; 36. Filter screen; 4. Conveying box; 41. Motor; 42. Spiral conveyor blades; 43. Feeding pipe. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] like Figs. 1-3 As shown, this utility model is a straw drying device for biomass fuel, including a drying chamber 1 and an air heating chamber 2. A blower 32 is fixedly installed inside the air heating chamber 2. An electric heating wire 33 is provided at the blowing end of the blower 32. The upper end of the air heating chamber 2 is connected to an air outlet hood 35 through a pipe 34. An air inlet 21 is provided on the side of the air heating chamber 2. A filter plate 3 is engaged with the outside of the air inlet 21. By turning on the switch of the blower 32, the blower 32 can draw in external air. The external air enters the air heating chamber 2 after being filtered by the filter plate 3. The filter plate 3 can prevent external dust from entering the drying chamber 1 and affecting the blower 32 and the electric heating wire 33 inside. When the external power switch of the electric heating wire 33 is turned on, the airflow enters the pipe 34 after being heated by the electric heating wire 33. The hot airflow reaches the air outlet hood 35 through the pipe 34 and begins to dry the straw particles that fall from the feed pipe 43.

[0019] The air heating chamber 2 has sliding grooves 23 on both the upper and lower sides. A sliding rod 24 is fixedly installed in the sliding groove 23. A spring 25 is sleeved on the outside of the sliding rod 24. A slider 26 is movably installed on the sliding rod 24. A fixing frame 27 is fixedly installed on the side of the slider 26. When the filter plate 3 needs to be disassembled and replaced, the fixing frame 27 is slid outward, which can drive the slider 26 in the sliding groove 23 to slide outward. One end of the spring 25 is connected to the inner wall of the sliding groove 23, and the other end is connected to the side of the slider 26. The slider 26 can squeeze the spring 25 on the side. After the fixing frame 27 slides outward, it can release the restriction on the filter plate 3, and the worker can disassemble and clean the filter plate 3. During the drying process of straw pellets, since the surrounding environment is prone to dust, this position can facilitate the worker to clean the filter plate frequently, avoiding the long-term blockage of dust on the surface of the filter plate 3, which will cause poor air flow and affect the circulation of the generated hot airflow, thus resulting in poor drying effect of straw pellets.

[0020] The drying chamber 1 is equipped with a conveyor box 4. A motor 41 is mounted on the top of the conveyor box 4, and a spiral conveying blade 42 is mounted on the output end of the motor 41. A feeding hopper 13 is located at the lower end of the conveyor box 4, and a conveying pipe 43 is located at the upper end of the conveyor box 4. When the straw particles to be dried are fed into the drying chamber 1, they fall from a height into the feeding hopper 13. The feeding hopper 13 gathers the straw particles at the opening at the bottom of the conveyor box 4. By turning on the external power switch of the motor 41, the spiral conveying blade 42 at the output end of the motor 41 begins to rotate inside the conveyor box 4. The ends of the spiral conveying blade 42 are located at the opening of the conveyor box 4, enabling the conveying of the straw particles gathered in the feeding hopper 13 to the top of the conveyor box 4. A partition 14 is fixedly installed inside the drying chamber 1. The upper side of the partition 14 is connected to the conveying pipe 43. The straw particles are introduced into the conveying pipe 43 from the top of the conveying box 4 and fall from the conveying pipe 43 to the hot air conveying position. During the falling process, the straw particles can fully contact the hot air and effectively carry out the drying work. A guide plate 15 is fixedly installed on the partition 14 and the side wall of the drying chamber 1. A guide port 16 is opened on the guide plate 15. The dried straw particles fall onto the guide plate 15 and enter the guide port 16 from the inclined guide plate 15. Then they can fall into the feeding hopper 13 again and be conveyed by the conveying box 4 again. This cycle can complete the drying work of the straw particles and effectively achieve the drying effect of the straw particles.

[0021] In the above scheme, the top of the drying box 1 is provided with a feeding pipe 11, and the upper end of the feeding pipe 11 is provided with a cover plate 12. The straw particles to be dried are injected into the feeding pipe 11, and the cover plate 12 is closed to ensure the airtightness of the drying box 1 and prevent heat loss.

[0022] In the above scheme, a placement frame 17 is placed on the upper end of the drying box 1. The placement frame 17 contains a desiccant 18. An opening is provided at the upper end of the drying box 1. The limiting plate of the placement frame 17 is placed on the upper end of the opening. The lower end of the placement frame 17 is inside the drying box 1. The desiccant 18 is placed inside the placement frame 17. The surface of the placement frame 17 has through holes. Therefore, when the hot airflow from the exhaust hood 35 begins to dry the straw particles that have fallen from a height, the water vapor generated during drying can enter the desiccant 18 through the through holes of the placement frame 17. The desiccant 18 can absorb the water vapor and prevent the water vapor from condensing at the top of the drying box 1, forming streams, and dripping back into the straw particles, resulting in poor drying effect on the straw particles. When it is necessary to replace the desiccant 18, the handle at the top of the placement frame 17 can be pulled to remove the placement frame 17 from the drying box 1.

[0023] In the above scheme, the exhaust end of the exhaust hood 35 is equipped with a filter screen 36. The filter screen 36 can prevent straw particles from falling into the exhaust hood 35 when they are discharged from the high conveying pipe 43 onto the guide plate 15, thus affecting the performance. When the dust mixed with the straw particles adheres to the surface of the filter screen 36 of the exhaust hood 35, the hot airflow can blow away the dust on the surface of the filter screen 36, so it will not affect the delivery of the hot airflow.

[0024] Working principle:

[0025] In this biomass fuel straw drying device, the required straw pellets are injected into the injection pipe 11, the cover plate 12 is closed, and the external power switch of the motor 41 is turned on. The spiral conveying blades 42 at the output end of the motor 41 start to rotate in the conveying box 4. The straw pellets are introduced from the top of the conveying box 4 into the conveying pipe 43. By turning on the exhaust fan 32, the exhaust fan 32 can draw out the outside air. By turning on the external power switch of the electric heating wire 33, the airflow is heated by the electric heating wire 33. The airflow reaches the air outlet 35 through the pipe 34 and begins to dry the straw pellets falling from the conveying pipe 43. The dried straw pellets fall onto the guide plate 15 and enter the guide port 16 from the inclined guide plate 15. They can then fall into the feeding hopper 13 again and be conveyed by the conveying box 4 again. This cycle can complete the drying work of the straw pellets and effectively achieve the drying effect.

[0026] The above description is only a preferred embodiment of the present utility model and is 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 should be included within the protection scope of the present utility model.

Claims

1. A straw drying device for biomass fuel, comprising a drying chamber (1) and an air heating chamber (2), characterized in that, An exhaust fan (32) is fixedly installed inside the air heating chamber (2). The blower end of the exhaust fan (32) is equipped with an electric heating wire (33). The upper end of the air heating chamber (2) is connected to the air outlet hood (35) through a pipe (34). An air inlet (21) is provided on the side of the air heating chamber (2). A filter plate (3) is engaged with the outside of the air inlet (21). Slide grooves (23) are provided on the upper and lower sides of the air heating chamber (2). A slide rod (24) is fixedly installed in the slide groove (23). A spring (25) is sleeved on the outside of the slide rod (24). A slider (26) is movably mounted on the slide rod (24). A fixing frame (27) is fixed on the side of the slider (26). A conveyor box (4) is fixed inside the drying box (1). A motor (41) is mounted on the top of the conveyor box (4). A spiral conveying blade (42) is mounted on the output end of the motor (41). A feeding hopper (13) is mounted at the lower end of the conveyor box (4). A conveying pipe (43) is mounted on the upper end of the conveyor box (4).

2. The straw drying device for biomass fuel according to claim 1, characterized in that, The top of the drying box (1) is provided with a feeding pipe (11), and the upper end of the feeding pipe (11) is provided with a cover plate (12).

3. The straw drying device for biomass fuel according to claim 1, characterized in that, A placement frame (17) is placed on the upper end of the drying box (1), and a desiccant (18) is placed inside the placement frame (17).

4. The straw drying device for biomass fuel according to claim 1, characterized in that, One end of the spring (25) is connected to the inner wall of the groove (23), and the other end is connected to the side of the slider (26).

5. A straw drying device for biomass fuel according to claim 1, characterized in that, The air outlet end of the air hood (35) is equipped with a filter screen (36).

6. The straw drying device for biomass fuel according to claim 1, characterized in that, The drying box (1) is fixedly provided with a partition (14), and the upper side of the partition (14) is connected to the conveying pipe (43).

7. A straw drying device for biomass fuel according to claim 6, characterized in that, The partition (14) and the side wall of the drying box (1) are fixedly provided with a guide plate (15), and a guide port (16) is opened on the guide plate (15).

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