Straw fuel additive mixing device

Abstract

The utility model discloses a straw fuel additive mixing device which comprises a reaction kettle, a top cover is detachably connected to the top of the reaction kettle, a plurality of feeding hoppers are arranged on the top cover, a stirring assembly is arranged in the reaction kettle, the stirring assembly comprises a rotating shaft, a stirring paddle is horizontally arranged on the side face of the rotating shaft, and the stirring paddle is arranged on the rotating shaft. Stirring blades are vertically arranged on the stirring paddles, the top of the rotating shaft is detachably connected with a driving assembly, the driving assembly comprises a connecting shaft, and the lower portion of the rotating shaft is movably connected to a driving box. The additive dispersing and mixing device is scientific and reasonable in structural design, the stirring paddle is arranged on the side face of the rotating shaft, the stirring blades are distributed on the stirring paddle, a three-dimensional stirring mechanism is formed, the additive dispersing and mixing effect is better, the top cover, the stirring shaft and the spiral feeding blades can be independently detached, the cleaning time is greatly shortened, and the cost is reduced. When part of the mechanism is damaged, replacement treatment can be facilitated, and the use cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of fuel conditioner mixing equipment, specifically a straw fuel additive mixing device. Background Technology

[0002] Biomass fuel is a high-quality renewable energy source, made by crushing agricultural straw, sawdust, and other materials into powder and then pelletizing them using a pellet mill. Biomass pellet fuel has energy equivalent to medium-quality coal, provides sustained combustion, produces less black smoke, maintains high furnace temperatures, and is very convenient to store, transport, and use, effectively replacing fossil fuels in production and daily life. However, the high alkali metal content in ordinary biomass pellet fuel makes it prone to slagging, ash accumulation, and incomplete combustion during combustion, leading to low combustion efficiency and unstable operation in boilers, significantly limiting the use of biomass pellet fuel. Currently, the process of adding additives and mixing the fuel involves time-consuming and labor-intensive cleaning of residual materials, which can easily breed bacteria. The discharge port relies on gravity feeding, and straw fragments often get stuck, requiring manual unblocking, thus affecting the production efficiency of biomass fuel pelleting. Therefore, we propose a straw fuel additive mixing device. Utility Model Content

[0003] The purpose of this invention is to provide a straw fuel additive mixing device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a straw fuel additive mixing device, comprising a reaction vessel, a top cover detachably connected to the top of the reaction vessel, a plurality of feeding hoppers provided on the top cover, a stirring assembly provided inside the reaction vessel, the stirring assembly comprising a rotating shaft, a stirring paddle horizontally arranged on the side of the rotating shaft, a stirring blade vertically arranged on the stirring paddle, a drive assembly detachably connected to the top of the rotating shaft, the drive assembly comprising a connecting shaft, the lower part of the rotating shaft movably connected to a drive box, a driving bevel gear provided at the bottom of the rotating shaft, a driven bevel gear meshing on the side of the driving bevel gear, a rotating shaft connected to the side of the driven bevel gear, a spiral feeding blade connected end to end on the rotating shaft, the end of the rotating shaft penetrating through the side wall of the reaction vessel and extending into the discharge pipe, and the drive box being fixedly installed on a baffle.

[0005] In the above scheme, a support column is provided at the bottom of the reactor.

[0006] In the above scheme, the feeding hopper is spirally connected with a screw cap.

[0007] In the above scheme, the stirring plate has several through holes.

[0008] In the above scheme, a connecting block is connected to the bottom of the connecting shaft, the connecting block is snapped into the connecting groove at the top of the rotating shaft and fixedly connected by a bolt assembly, a reducer is connected to the top of the connecting shaft, and a motor is connected to the side of the reducer.

[0009] In the above scheme, a discharge valve is provided at the bottom of the discharge pipe.

[0010] In the above scheme, the motor is connected to the power supply and the switch via wires.

[0011] Compared with the prior art, the beneficial effects of this utility model are: the straw fuel additive mixing device has a simple and reasonable structural design and strong practicality. By setting a stirring paddle on the side of the rotating shaft and distributing stirring blades on the stirring paddle, a three-dimensional stirring mechanism is formed, which makes the additive dispersion and mixing effect better. In addition, the top cover, stirring shaft and spiral feeding blade can be disassembled independently, which greatly shortens the cleaning time. When some parts of the mechanism are damaged, they can be easily replaced, effectively reducing the cost of use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0013] Figure 2 This utility model Figure 1 Schematic diagram of the structure at point A in the middle.

[0014] Figure 3 This is a schematic diagram of the spiral feeding mechanism of this utility model.

[0015] In the diagram: 1. Reactor; 11. Top cover; 12. Support column; 13. Feed hopper; 14. Screw cap; 15. Rotating shaft; 16. Stirring paddle; 17. Stirring blade; 18. Through hole; 19. Connecting groove; 2. Connecting block; 21. Bolt assembly; 22. Connecting shaft; 23. Reducer; 24. Motor; 25. Drive box; 26. Driving bevel gear; 27. Driven bevel gear; 28. Rotating shaft; 29. ​​Spiral feeder; 3. Discharge pipe; 31. Discharge valve; 32. Baffle. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: a straw fuel additive mixing device, including a reaction vessel 1, the top of which is detachably connected to a top cover 11. The top cover 11 is bolted to the top of the reaction vessel 1 through an annular flange. A heat-resistant silicone sealing ring is embedded between the flanges to achieve an IP65 level seal. The detachable design allows the top cover to be hoisted as a whole using lifting lugs and disassembled within 10 minutes. The top cover 11 is equipped with multiple feeding hoppers 13. The reactor 1 is equipped with a stirring assembly, which includes a rotating shaft 15. A stirring paddle 16 is horizontally arranged on the side of the rotating shaft 15, and stirring blades 17 are vertically arranged on the stirring paddle 16. A drive assembly is detachably connected to the top of the rotating shaft 15. The drive assembly includes a connecting shaft 22. The lower part of the rotating shaft 15 is movably connected to a drive box 25. A driving bevel gear 26 is arranged at the bottom of the rotating shaft 15. A driven bevel gear 27 meshes with the side of the driving bevel gear 26. A rotating shaft 28 is connected to the side of the driven bevel gear 27. A spiral feeding blade 29 is arranged on the rotating shaft 28. The end of the rotating shaft 28 extends through the side wall of the reactor 1 and into the discharge pipe 3. The drive box 25 is fixedly installed on the baffle 32. The drive box 25 is a cast iron shell, which is fixed to the baffle 32 by four expansion bolts. The baffle is welded to the inner wall of the reactor.

[0018] The spiral feed blade 29 consists of continuous, equidistant blades, fully welded to the rotating shaft 28, and extends to the discharge pipe 3 at its end. The bevel gear reversal enables "high-speed rotation of the mixing shaft + low-speed pushing of the spiral shaft," and the spiral blades force discharge, solving the problem of straw debris blockage. The blade end-to-end connection design eliminates dead zones where materials may stagnate.

[0019] In the above scheme, a support column 12 is provided at the bottom of the reactor 1.

[0020] In the above scheme, the feeding hopper 13 is spirally connected with a cap 14. Specifically, the three feeding hoppers 13 are evenly distributed at 120° (the central hopper is used for straw crushing, and the two side hoppers are used for liquid additives). The inner wall of the cap 14 is provided with a trapezoidal thread, which cooperates with the external thread of the feeding hopper. When tightened, it compresses the built-in silicone gasket to achieve a seal.

[0021] The multi-hopper feeding system prevents different materials from clogging the feeding port (straw and liquid are fed separately), and the screw cap seals to prevent dust from overflowing.

[0022] In the above scheme, the stirring blade 17 has several through holes 18. The through holes 18 are distributed in a honeycomb pattern, the horizontal blade forms a circulation, the vertical blade shears the fiber clusters, and the through holes accelerate liquid penetration (increasing the throughput of liquid additives by 25%). The honeycomb design reduces stirring resistance by 30%.

[0023] In the above scheme, the bottom of the connecting shaft 22 is connected to a connecting block 2, the connecting block 2 is snapped into the connecting groove 19 at the top of the rotating shaft 15 and fixedly connected by a bolt assembly 21, the top of the connecting shaft 22 is connected to a reducer 23, and the side of the reducer 23 is connected to a motor 24.

[0024] In the above scheme, a discharge valve 31 is provided at the bottom of the discharge pipe 3. The discharge pipe 3 is a stainless steel pipe (500mm long) with a polished inner wall, and the discharge valve 31 is a pneumatic knife gate valve (diameter φ200mm) which is controlled to open and close by a PLC.

[0025] The above design, combined with a spiral pusher, prevents material accumulation; the knife gate valve can be connected to an external conveying pipeline, making it suitable for automated production lines (such as a 10-ton-per-hour straw fuel production line).

[0026] In the above scheme, the motor 24 is connected to the power supply and the switch via wires. The motor 24 wires are made of waterproof cable, and the switch is a waterproof button box with an emergency stop, installed on the side of the top cover 11 (1.5m above the ground at human-machine height).

[0027] Functions and effects: The emergency stop switch cuts off the power in 0.2 seconds to ensure operational safety; the waterproof design is suitable for the humid environment of straw processing; the cable is temperature resistant from -40℃ to 105℃ and has a lifespan of more than 5 years.

[0028] Working principle:

[0029] This straw fuel additive mixing device includes the following usage stages: Feeding stage: Open the screw cap 14, and straw fragments and liquid additives are fed into the corresponding feeding hoppers. Close the screw cap to prevent dust. Mixing stage: The motor 24 drives the rotating shaft 15 to rotate at high speed. The stirring paddle 16 promotes the horizontal circulation of materials. The through holes of the stirring plate 17 accelerate the liquid penetration. The vertical angle cuts the fiber clumps to form a "shearing + penetration" dual mixing. Discharge stage: The active bevel gear 26 drives the driven bevel gear 27. The rotating shaft 28 rotates at low speed. The spiral feeding plate 29 pushes the bottom material to the discharge pipe 3. The discharge valve 31 controls the flow rate. Maintenance stage: Disconnect the bolt assembly 21, lift the top cover 11, pull out the rotating shaft 15 and rotating shaft 28, and rinse with a water gun for 5 minutes to complete the cleaning.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A straw fuel additive mixing device, comprising a reaction vessel (1), characterized in that: The top of the reactor (1) is detachably connected to a top cover (11), and the top cover (11) is provided with multiple feeding hoppers (13). The reactor (1) is provided with a stirring assembly, which includes a rotating shaft (15). A stirring paddle (16) is horizontally arranged on the side of the rotating shaft (15), and stirring blades (17) are vertically arranged on the stirring paddle (16). The top of the rotating shaft (15) is detachably connected to a driving assembly, which includes a connecting shaft (22). The lower part of the rotating shaft (15) is... The drive box (25) is connected to the drive box (25). The bottom of the rotating shaft (15) is provided with a driving bevel gear (26). The side of the driving bevel gear (26) is meshed with a driven bevel gear (27). The side of the driven bevel gear (27) is connected to a rotating shaft (28). The rotating shaft (28) is provided with a spiral feeding plate (29) connected end to end. The end of the rotating shaft (28) extends through the side wall of the reactor (1) and into the discharge pipe (3). The drive box (25) is fixedly installed on the baffle (32).

2. The straw fuel additive mixing device according to claim 1, characterized in that: The bottom of the reactor (1) is provided with a support column (12).

3. The straw fuel additive mixing device according to claim 1, characterized in that: The feeding hopper (13) is spirally connected to a cap (14).

4. The straw fuel additive mixing device according to claim 1, characterized in that: The stirring plate (17) has several through holes (18).

5. The straw fuel additive mixing device according to claim 1, characterized in that: The bottom of the connecting shaft (22) is connected to a connecting block (2), which is snapped into the connecting groove (19) at the top of the rotating shaft (15) and fixedly connected by a bolt assembly (21). The top of the connecting shaft (22) is connected to a reducer (23), and the side of the reducer (23) is connected to a motor (24).

6. The straw fuel additive mixing device according to claim 1, characterized in that: The bottom of the discharge pipe (3) is provided with a discharge valve (31).

7. The straw fuel additive mixing device according to claim 5, characterized in that: The motor (24) is connected to the power source and the switch via wires.

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