A mineral powder drying device

Abstract

This utility model relates to the field of drying equipment technology, specifically a mineral powder drying device, including a drying chamber and a feed hopper connected to the upper side of the drying chamber. It also includes a dual-shaft staggered stirring mechanism located inside the drying chamber, bottom-angled hot air nozzle assemblies located on both sides of the bottom of the drying chamber with their air outlets extending obliquely into the drying chamber, and a hot air conveying mechanism located on the outer wall of the drying chamber. The air outlets of the two bottom-angled hot air nozzle assemblies are both angled downwards towards the lower interior of the drying chamber, and both bottom-angled hot air nozzle assemblies are staggered with the dual-shaft staggered stirring mechanism. The hot air conveying mechanism is connected to the two bottom-angled hot air nozzle assemblies. This device can omnidirectionally agitate the mineral powder, breaking up any deposits or clumps at the bottom; it penetrates the mineral powder layer from multiple angles on both sides of the bottom of the chamber, ensuring full contact, eliminating dead zones in hot air distribution, improving uneven heating, enhancing uniformity, avoiding uneven drying, and ensuring consistent quality.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, specifically a mineral powder drying device. Background Technology

[0002] Mineral powder is a powder material obtained through processes such as ore crushing and grinding. It is an important material in infrastructure construction. Mineral powder needs to come into contact with water during the preparation process. Therefore, due to its high moisture content during processing, mineral powder is prone to clumping. Direct use may cause problems such as air bubbles on the road surface. Therefore, a drying device for mineral powder processing is required.

[0003] Existing mineral powder drying equipment typically uses single-shaft agitation mechanisms, which can only unidirectionally or partially agitate the mineral powder, making it difficult to agitate it omnidirectionally. This results in the mineral powder at the bottom easily settling and clumping, failing to fully contact the hot air. At the same time, the bottom-angled hot air nozzle assembly is often located above the drying chamber, causing the hot air to mainly act on the upper layer of the mineral powder, while the middle and lower layers of mineral powder fail to receive sufficient hot air, creating obvious heating blind spots. This leads to uneven drying of the mineral powder, with the upper layer potentially over-dried due to excessive heating, while the middle and lower layers are under-dried. This seriously affects the stability of the dried mineral powder quality and fails to meet the actual needs of efficient and uniform drying in production. Utility Model Content

[0004] The purpose of this invention is to provide a mineral powder drying device to solve the problems of existing mineral powder drying devices, such as difficulty in omnidirectional stirring with single-shaft agitation, easy deposition and clumping of mineral powder at the bottom, and difficulty in sufficient contact with hot air; the hot air component is located at the top of the chamber, only the upper layer of mineral powder is sufficiently heated, while the middle and lower layers are insufficient, forming blind spots, resulting in uneven drying, unstable quality, and difficulty in meeting the requirements of high efficiency and uniformity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a mineral powder drying device, comprising a drying chamber and a feed hopper connected to the upper side of the drying chamber, further comprising a dual-shaft staggered stirring mechanism disposed inside the drying chamber, bottom-angled hot air nozzle assemblies disposed on both sides of the bottom of the drying chamber with their air outlets extending obliquely into the drying chamber, and a hot air conveying mechanism disposed on the outer wall of the drying chamber; the two bottom-angled hot air nozzle assemblies are symmetrically arranged, and the air outlets of the two bottom-angled hot air nozzle assemblies are both obliquely facing the lower inner side of the drying chamber, and the two bottom-angled hot air nozzle assemblies are staggered with the dual-shaft staggered stirring mechanism; the hot air conveying mechanism is connected to the two bottom-angled hot air nozzle assemblies.

[0006] Furthermore, the dual-shaft staggered stirring mechanism includes a first rotating shaft and a second rotating shaft rotatably connected inside the drying chamber and arranged longitudinally at intervals, gears respectively disposed on the outer walls of the first rotating shaft and the second rotating shaft, a plurality of first stirring blades and second stirring blades respectively disposed on the outer walls of the first rotating shaft and the second rotating shaft, and a first motor disposed on the other side of the drying chamber; the output end of the first motor is drivenly connected to one end of the first rotating shaft; the two gears mesh with each other; and the plurality of first stirring blades and the plurality of second stirring blades are arranged at staggered intervals.

[0007] Furthermore, the bottom inclined hot air nozzle assembly includes branch pipes located at the bottom of both sides of the drying chamber, and multiple inclined air outlet nozzles that communicate with the outer wall of the branch pipes, penetrate the outer wall of the drying chamber, and extend into the interior of the drying chamber; the axis of the inclined air outlet nozzles forms an angle of 30°-45° with the horizontal direction and faces the lower side of the interior of the drying chamber; the multiple inclined air outlet nozzles and multiple second stirring blades are arranged alternately.

[0008] Furthermore, the hot air conveying mechanism includes a hot air blower located on the upper side of the drying chamber and spaced apart from the feed hopper, an air supply pipe connected to the air outlet port of the hot air blower, and a horizontal pipe connected to the air outlet port of the air supply pipe and located below the gear; the air inlet ports of the two branch pipes are respectively connected to the two air outlet ports of the horizontal pipe.

[0009] Furthermore, the upper side of the drying chamber is connected to an exhaust port that is spaced apart from the feed hopper, and the exhaust port is provided with an activated carbon filter layer.

[0010] Furthermore, the lower side of the drying chamber is provided with four evenly arranged support legs; the lower middle part of the drying chamber is connected to a discharge port located between the four support legs, and a discharge valve is provided on the discharge port pipe section.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0012] 1. The mineral powder drying device of this utility model forms a highly efficient drying system through the coordinated operation of a dual-shaft staggered stirring mechanism, a bottom-angled hot air nozzle assembly, and a hot air conveying mechanism. The first and second shafts of the dual-shaft staggered stirring mechanism rotate synchronously in opposite directions under gear meshing, driving the first and second stirring blades to agitate the mineral powder in an alternating manner, thus fully dispersing any deposited or clump-like mineral powder. Combined with the bottom-angled hot air nozzle assembly symmetrically arranged on both sides and staggered with the stirring mechanism, the hot air can bypass the obstruction of the second stirring blades and penetrate the mineral powder layer from different angles on both sides of the bottom of the drying chamber, achieving full contact with the mineral powder. This overcomes the limitation of insufficient heating of some mineral powder areas in traditional drying methods, significantly improving the uniformity of heating and fundamentally avoiding the problems of insufficient or excessive drying in certain areas, ensuring the consistency of the dried mineral powder quality.

[0013] 2. The inclined air nozzle assembly at the bottom of this utility model has an inclined air outlet nozzle at an angle of 30°-45°. This angle design can use the impact force of the airflow to slightly lift the mineral powder, enhance the collision and contact force between the hot air and the mineral powder particles, and expand the effective range of the hot air in the drying chamber. At the same time, multiple inclined air outlet nozzles are evenly distributed along the branch pipe, so that the hot air output point covers most of the bottom area of ​​the drying chamber. Combined with the tumbling action of the stirring mechanism, the mineral powder is continuously in contact with the hot air during the movement, which accelerates the moisture evaporation rate, shortens the drying cycle, and further improves the drying efficiency. Attached Figure Description

[0014] Figure 1 This is a cross-sectional schematic diagram of the mineral powder drying device of this utility model;

[0015] Figure 2 This is a partial side cross-sectional view of the drying oven of this utility model;

[0016] Figure 3 This is a bottom view of the bottom angled hot air nozzle assembly of this utility model;

[0017] Figure 4 This is a system control block diagram of the mineral powder drying device of this utility model.

[0018] In the diagram: 1. Drying oven; 2. Discharge port; 3. Discharge valve; 4. Feed hopper; 5. Motor; 6. First rotating shaft; 7. Second rotating shaft; 8. First stirring blade; 9. Second stirring blade; 10. Gear; 11. Hot air blower; 12. Air supply pipe; 13. Horizontal pipe; 14. Branch pipe; 15. Angled air outlet nozzle; 16. Support leg; 17. Exhaust port. Detailed Implementation

[0019] Please see Figure 1-4 A mineral powder drying device includes a drying chamber 1 and a feed hopper 4 connected to the upper side of the drying chamber 1. A sealing cover plate is rotatably connected to the upper edge of the feed hopper 4 via a hinge for sealing. The device also includes a dual-shaft staggered stirring mechanism disposed inside the drying chamber 1, bottom-angled hot air nozzle assemblies disposed on both sides of the bottom of the drying chamber 1 with their air outlets extending obliquely into the drying chamber 1, and a hot air conveying mechanism disposed on the outer wall of the drying chamber 1. The two bottom-angled hot air nozzle assemblies are symmetrically arranged, and the air outlets of the two bottom-angled hot air nozzle assemblies are both obliquely facing the lower inner side of the drying chamber 1. The two bottom-angled hot air nozzle assemblies are staggered with the dual-shaft staggered stirring mechanism. The hot air conveying mechanism is connected to the two bottom-angled hot air nozzle assemblies.

[0020] The dual-shaft staggered stirring mechanism includes a first rotating shaft 6 and a second rotating shaft 7, which are supported by bearing seats and rotatably connected inside the drying chamber 1 and arranged longitudinally at intervals; gears 10 respectively sleeved and fixed to the outer walls of the first rotating shaft 6 and the second rotating shaft 7; multiple first stirring blades 8 and multiple second stirring blades 9 respectively connected to the outer walls of the first rotating shaft 6 and the second rotating shaft 7; and a first motor 5 installed on the other side of the drying chamber 1. The output end of the first motor 5 is connected to one end of the first rotating shaft 6 for transmission; the two gears 10 mesh; and the multiple first stirring blades 8 and multiple second stirring blades 9 are arranged at staggered intervals. The surfaces of the first stirring blades 8 and the second stirring blades 9 are both coated with wear-resistant coatings to extend their service life; both ends of the first rotating shaft 6 and the second rotating shaft 7 are equipped with shaft sealing devices to prevent mineral powder dust from leaking from the gap between the shaft and the drying chamber 1. The meshing transmission of the gears 10 ensures the synchronicity and stability of the rotation of the first rotating shaft 6 and the second rotating shaft 7.

[0021] The bottom-mounted angled hot air nozzle assembly includes branch pipes 14 installed at the bottom of both sides of the drying chamber 1, and multiple angled air outlet nozzles 15 that communicate with the outer wall of the branch pipes 14, penetrate the outer wall of the drying chamber 1, and extend into the interior of the drying chamber 1. The axis of the angled air outlet nozzles 15 forms a 30°-45° angle with the horizontal direction and faces the lower interior of the drying chamber 1. The multiple angled air outlet nozzles 15 are staggered with multiple second stirring blades 9. The hot air delivered by the branch pipes 14 can be blown into the mineral powder in the drying chamber 1 through the angled air outlet nozzles 15. The 30°-45° air outlet angle allows the hot air to act obliquely on the mineral powder, enhancing the contact force with the mineral powder. The staggered arrangement of the angled air outlet nozzles 15 and the second stirring blades 9 avoids the second stirring blades 9 from blocking the air path when rotating, ensuring that the hot air evenly covers the mineral powder. The setting of multiple angled air outlet nozzles 15 increases the hot air output points, further expands the hot air action range, and improves drying efficiency.

[0022] The hot air conveying mechanism includes a hot air blower 11 installed on the upper side of the drying chamber 1 and spaced apart from the feed hopper 4, an air supply pipe 12 connected to the air outlet of the hot air blower 11, and a horizontal pipe 13 connected to the air outlet of the air supply pipe 12 and located below the gear 10; the air inlets of the two branch pipes 14 are respectively connected to the two air outlets of the horizontal pipe 13. The hot air generated by the hot air blower 11 is sequentially distributed to the two branch pipes 14 through the air supply pipe 12 and the horizontal pipe 13, realizing the orderly conveying of hot air.

[0023] The upper side of the drying chamber 1 is connected to exhaust ports 17, which are spaced apart from the feed hopper 4. An activated carbon filter layer is installed inside the exhaust ports 17. The exhaust ports 17 provide a discharge channel for the waste gas generated during the drying process inside the drying chamber 1, preventing excessively high air pressure inside the chamber from affecting drying efficiency, and also preventing moisture accumulation that could cause the mineral powder to become damp again. The activated carbon filter layer is installed inside the exhaust ports 17, which can adsorb dust and odors in the waste gas, reducing pollution to the surrounding environment.

[0024] The lower side of the drying chamber 1 is connected to four evenly distributed support legs 16, which provide stable support for the drying chamber 1. A discharge port 2, located between the four support legs 16, is connected to the lower center of the drying chamber 1. A discharge valve 3 is installed on the pipe section of the discharge port 2. The discharge valve 3 is directly installed on the pipe section of the discharge port 2 and can control the start, stop, and speed of discharge.

[0025] A programmable logic controller (PLC) is fixedly installed on one side of the drying chamber 1 by bolts. The PLC is electrically connected to the motor 5, the hot air blower 11 and the discharge valve 3. The start-stop timing and speed of the motor 5, the hot air blower 11 and the discharge valve 3 are adjusted by preset program to ensure that each part of the equipment operates according to the coordinated logic.

[0026] It should be noted that the motor 5, hot air blower 11, and discharge valve 3 are all commercially available and mature products that can be purchased directly. Their specific models and specifications can be selected according to the actual application scenario. The staff does not need to understand the specific structure and working principle of these components. As long as the purchased products can operate normally, it will not affect the specific implementation of this utility model. Therefore, they will not be described in detail here.

[0027] Working process and principle: After the mineral powder to be dried enters the drying chamber 1 from the feed hopper 4, the sealing cover is closed to prevent hot air and dust that may overflow from the feed hopper 4 during the drying process, thus reducing heat loss and dust pollution in the working environment; the programmable logic controller (PLC) starts the first motor 5 according to the preset program, and its output drives the first rotating shaft 6 to rotate, which drives the second rotating shaft 7 to rotate synchronously through two meshing gears 10, so that the first stirring blade 8 and the second stirring blade 9 alternately stir the mineral powder; at the same time, the hot air blower 11 starts, and the generated hot air is distributed to the side branch pipes 14 through the air supply pipe 12 and the horizontal pipe 13. The hot air is then blown into the lower part of the drying chamber 1 through multiple oblique air nozzles 15 at an angle of 30°-45° to the horizontal. The oblique air nozzles 15 and the second stirring blades 9 are arranged alternately to ensure that the hot air and the stirred mineral powder are in full contact to achieve uniform drying. The exhaust gas generated during the drying process is discharged through the exhaust port 17, where the activated carbon filter layer purifies the exhaust gas. After drying is completed, the PLC controls the discharge valve 3 to open, and the mineral powder is discharged through the discharge port 2. The four support legs 16 provide stable support for the device. The entire process is coordinated by the PLC to ensure the operation of each component, thus ensuring drying efficiency and stability.

[0028] 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, and improvements 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 mineral powder drying device, comprising a drying chamber (1) and a feed hopper (4) communicating with the upper side of the drying chamber (1), characterized in that, It also includes a biaxial interleaved stirring mechanism located inside the drying chamber (1), bottom inclined hot air nozzle assemblies located at the bottom of both sides of the drying chamber (1) with their air outlets extending obliquely into the drying chamber (1), and a hot air conveying mechanism located on the outer wall of the drying chamber (1); the two bottom inclined hot air nozzle assemblies are symmetrically arranged, and the air outlets of the two bottom inclined hot air nozzle assemblies are obliquely facing the lower inner side of the drying chamber (1), and the two bottom inclined hot air nozzle assemblies are interleaved with the biaxial interleaved stirring mechanism; the hot air conveying mechanism is connected to the two bottom inclined hot air nozzle assemblies.

2. The drying apparatus according to claim 1, characterized in that, The dual-shaft staggered stirring mechanism includes a first rotating shaft (6) and a second rotating shaft (7) rotatably connected inside the drying chamber (1) and arranged longitudinally at intervals; gears (10) respectively disposed on the outer walls of the first rotating shaft (6) and the second rotating shaft (7); a plurality of first stirring blades (8) and second stirring blades (9) respectively disposed on the outer walls of the first rotating shaft (6) and the second rotating shaft (7); and a first motor (5) disposed on the other side of the drying chamber (1); the output end of the first motor (5) is connected to one end of the first rotating shaft (6); the two gears (10) mesh with each other; and the plurality of first stirring blades (8) and the plurality of second stirring blades (9) are arranged in a staggered manner.

3. The drying apparatus according to claim 2, characterized in that, The bottom inclined hot air nozzle assembly includes branch pipes (14) located at the bottom of both sides of the drying chamber (1), and multiple inclined air outlet nozzles (15) that communicate with the outer wall of the branch pipes (14), penetrate the outer wall of the drying chamber (1), and extend into the interior of the drying chamber (1). The axis of the inclined air outlet nozzles (15) forms an angle of 30°-45° with the horizontal direction and faces the lower side of the interior of the drying chamber (1). The multiple inclined air outlet nozzles (15) are arranged alternately with multiple second stirring blades (9).

4. The drying apparatus according to claim 3, characterized in that, The hot air conveying mechanism includes a hot air blower (11) located on the upper side of the drying box (1) and spaced apart from the feed hopper (4), an air supply pipe (12) connected to the air outlet of the hot air blower (11), and a horizontal pipe (13) connected to the air outlet of the air supply pipe (12) and located below the gear (10); the air inlet ports of the two branch pipes (14) are respectively connected to the two air outlet ports of the horizontal pipe (13).

5. The drying apparatus according to claim 1, characterized in that, The upper side of the drying box (1) is connected to an exhaust port (17) that is spaced apart from the feed hopper (4), and the exhaust port (17) is provided with an activated carbon filter layer.

6. The drying apparatus according to claim 1, characterized in that, The drying box (1) has four evenly arranged support legs (16) on its lower side; the lower middle part of the drying box (1) is connected to a discharge port (2) located between the four support legs (16), and a discharge valve (3) is provided on the discharge port (2) pipe section.

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