Drying apparatus for lime powder

Abstract

The utility model relates to dry device technical field, concretely is dry device for lime powder processing, the utility model discloses a drying bin, drying bin is vertical cylinder structure, and the top open place detachable cover has sealed cover plate, and the bottom is provided with the discharge gate, and the feeding assembly includes the feeding hopper fixed in the top surface of sealed cover plate, the lower extreme of feeding hopper penetrates sealed cover plate and is linked with drying bin inside, is used for putting into lime powder material in drying bin, and the discharge control assembly includes the discharge baffle of sliding insertion in the discharge gate department of drying bin bottom, the discharge baffle can slide along the radial horizontal of drying bin, and the device passes through the collaborative design of hot -blast dispersion conveying plus material dynamic turning, solves the problem of lime powder drying uneven in traditional device as far as possible, and the structure that the drying device adopts main rotating axle cooperates multiple hot -blast cylinder, and hot -blast is through main rotating axle internal hot -blast cavity, hot -blast cylinder and hot -blast export, and is transported to the bin body in the dispersed mode to avoid hot -blast concentration in the local part.

Description

Technical Field

[0001] This utility model relates to the field of drying equipment technology, and in particular to a drying equipment for lime powder processing. Background Technology

[0002] In the lime powder processing and production process, drying is a key step to ensure the quality and subsequent performance of lime powder. Currently, the industry mostly uses vacuum drying equipment to complete the dehydration of lime powder. Existing vacuum drying equipment mainly consists of core components such as a silo, cover plate, hot air pump, and pull plate. Its basic working process is as follows: the lime powder to be dried is put into the silo through the feeding structure, and the silo is evacuated by an external vacuum pump to create a low-pressure drying environment. Then, the hot air pump is started to deliver hot air into the silo. The moisture is evaporated by the heat exchange between the hot air and the lime powder. After the drying operation is completed, the pull plate is removed, and the dried lime powder is discharged from the discharge port at the bottom of the silo.

[0003] However, existing devices have obvious technical defects in practical applications: because the hot air is mostly introduced from the top or side of the silo in a single direction, and the lime powder is in a static accumulation state in the silo, the upper layer of lime powder near the hot air source can directly contact a large amount of hot air, resulting in high moisture evaporation efficiency and thorough drying; while the lime powder in the middle and bottom of the silo is blocked by the upper material, the contact area with the hot air is greatly reduced, and the heat exchange efficiency is significantly reduced, resulting in obvious differences in the degree of drying of different layers of lime powder in the silo, and the moisture content of some middle and lower layer lime powder exceeds the standard. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the background art by proposing a drying device for lime powder processing.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a drying device for lime powder processing, comprising a drying chamber, the drying chamber having a vertical cylindrical structure, a detachable sealing cover at the top opening, and a discharge port at the bottom. The feeding assembly includes a feeding funnel fixed to the top surface of the sealing cover, the lower end of which penetrates the sealing cover and communicates with the interior of the drying chamber, for feeding lime powder into the drying chamber. The discharge control assembly includes a discharge baffle slidably inserted at the discharge port at the bottom of the drying chamber, the discharge baffle being able to slide horizontally along the radial direction of the drying chamber to control the discharge port. The drying device, which can be opened or sealed, is located inside the drying chamber and includes a main rotating shaft arranged along the central axis of the drying chamber. A through hot air chamber is opened axially inside the main rotating shaft. Multiple hot air ducts are rotatably connected to its outer circumferential arc surface at intervals along the circumference and axial direction. Each hot air duct is connected to the inside of the hot air chamber, and the arc surface of the hot air duct has multiple hot air outlets for discharging hot air. An air intake auxiliary component is arranged between the sealing cover plate and the main rotating shaft to deliver hot air into the hot air chamber and drive the main rotating shaft to rotate. A stirring device is arranged in conjunction with the hot air duct to drive the hot air duct to rotate and agitate the lime powder material.

[0006] Preferably, the air intake auxiliary component includes a drive motor, which is fixedly installed in the middle of the top surface of the sealing cover. Its output shaft extends vertically downward through the sealing cover and is coaxially fixedly connected to the top end of the main rotating shaft. It is used to drive the main rotating shaft to rotate around its own axis. A hot air blower is fixedly installed on the top surface of the sealing cover to generate dry hot air. One end of the air guide pipe is sealed and connected to the air outlet of the hot air blower, and the other end extends through the sealing cover and into the drying chamber. The air collecting ring has a ring-shaped structure, is fixed to the bottom surface of the sealing cover and is sealed and connected to the end of the air guide pipe. The inner ring of the air collecting ring is rotatably and sealed to the outer circumferential arc surface of the top end of the main rotating shaft, which is used to guide the hot air delivered by the hot air blower to the main rotating shaft.

[0007] Preferably, the outer circumferential arc surface at the top of the main rotating shaft has multiple air inlets evenly distributed in the circumferential direction at the position corresponding to the air collecting ring. One end of each air inlet is connected to the interior of the air collecting ring, and the other end is connected to the interior of the hot air chamber, so that the hot air in the air collecting ring can enter the hot air chamber through the air inlet.

[0008] Preferably, the stirring device includes multiple stirring blades, and at least two stirring blades are fixedly connected to the outer circumferential arc surface of each hot air duct. The stirring blades are spaced apart along the length of the hot air duct and are used to agitate the lime powder in the drying chamber as the hot air duct rotates. Preferably, the driven shaft is coaxially fixed to the inner wall of the hot air duct near the main rotating shaft, and the end of the driven shaft away from the hot air duct extends into the hot air cavity.

[0009] Preferably, the transmission bevel gear is coaxially fixed to one end of the driven shaft extending into the hot air chamber. The transmission shaft is arranged radially along the main rotation shaft, with its two ends rotatably connected to the inner wall of the hot air chamber. The axis of the transmission shaft is perpendicular to the axis of the driven shaft. The second transmission bevel gear is coaxially fixed to the middle of the transmission shaft and meshes with the first transmission bevel gear to transmit power. The wind turbine is coaxially fixed to one end of the transmission shaft and is located inside the hot air chamber, used to drive the transmission shaft to rotate under the push of the hot air in the hot air chamber.

[0010] Preferably, a maintenance ladder is fixedly connected to the outer arc surface of the drying chamber. The maintenance ladder extends along the height direction of the drying chamber, allowing workers to climb to the sealing cover for maintenance. An operation panel is also fixedly installed on the outer arc surface of the drying chamber. The operation panel is electrically connected to the drive motor and hot air blower for controlling the operation of the device. A support frame is also fixedly connected to the outer periphery of the drying chamber. The support frame is evenly distributed along the circumference of the drying chamber to support the drying chamber and maintain its vertical stability.

[0011] In summary, the beneficial effects of this utility model are as follows: This device, through a synergistic design of hot air dispersion conveying and dynamic material tumbling, largely solves the problem of uneven drying of lime powder in traditional devices. On the one hand, the drying device adopts a structure with a main rotating shaft and multiple sets of hot air ducts. Hot air is conveyed to various areas of the silo in a multi-directional and dispersed manner through the hot air chamber inside the main rotating shaft, the hot air ducts, and the hot air outlet, avoiding the concentration of hot air in local areas. On the other hand, the stirring device, with the help of a pneumatic turbine and bevel gear transmission structure, drives the hot air duct to rotate on its own axis while revolving with the main rotating shaft. This drives the stirring blades to continuously tumble the lime powder, breaking the static accumulation state of the material and allowing the middle and lower layers of lime powder to fully contact the hot air. Ultimately, this ensures that all lime powder in the silo is dried to a uniform degree, with the moisture content deviation controlled within an extremely low range, thus guaranteeing product quality stability. Attached Figure Description

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional exploded structure diagram of the present invention; Figure 3 This is a three-dimensional structural diagram of the intake auxiliary component of this utility model; Figure 4 This is a three-dimensional structural diagram of the cylinder of this utility model.

[0013] Legend: 1. Drying chamber; 2. Main rotating shaft; 3. Hot air chamber; 4. Hot air duct; 5. Hot air outlet; 6. Drive motor; 7. Hot air blower; 8. Air guide pipe; 9. Air collecting ring; 10. Air inlet; 11. Stirring blades; 12. Driven rotating shaft; 13. Transmission bevel gear one; 14. Transmission rotating shaft; 15. Transmission bevel gear two; 16. Pneumatic turbine; 17. Sealing cover plate; 18. Feed hopper; 19. Maintenance ladder; 20. Control panel; 21. Support frame; 22. Discharge baffle. Detailed Implementation

[0014] Reference Figures 1-4 As shown, this utility model provides a technical solution: a drying device for lime powder processing. Its core function is to solve the problem of insufficient drying of the upper layer and insufficient drying of the middle and lower layers of lime powder in traditional drying devices. Through a coordinated design of hot air dispersion conveying and dynamic material turning, uniform drying of lime powder is achieved. The device includes a drying chamber 1, a feeding component, a discharge control component, a drying device, an air intake auxiliary component, and a stirring device. The drying chamber 1 is a vertical cylindrical structure made of stainless steel. The inner wall is polished to reduce lime powder adhesion. Its top is a circular opening, and the bottom narrows into a funnel shape to form a discharge port, facilitating concentrated material discharge. The supporting frame 21 is composed of multiple galvanized square steel bars, evenly distributed along the circumference of the drying chamber 1. The top of each square steel bar is fixed to the ear plate in the lower middle part of the outer wall of the drying chamber 1 by bolts. A horizontal support plate is welded to the bottom and pre-drilled holes for anchor bolts, allowing it to be fixed to the ground with anchor bolts to ensure the stability of the drying chamber 1 when placed vertically. The maintenance ladder 19 is made of carbon steel and is fixed to the outer wall of the drying chamber 1 by welding on one side (extending from the ground to near the bottom of the sealing cover 17). A guardrail is installed on the outside of the ladder to allow workers to climb to the top to inspect the air intake auxiliary components. The control panel 20 has a waterproof plastic shell and is fixed to the upper middle part of the outer wall of the drying chamber 1 (for easy operation). The panel integrates a power switch, motor speed adjustment knob, hot air blower temperature adjustment button, and operation indicator light. The internal circuit board is electrically connected to the drive motor 6 and hot air blower 7 via wires, allowing real-time control of the device's operating parameters. The feed hopper 18 is made of stainless steel and is inverted conical in shape. Its lower port is sealed to the pre-drilled hole on the top surface of the sealing cover 17 via a flange (a high-temperature resistant sealing gasket is installed between the flanges), and the lower port extends into the interior of the drying chamber 1 to prevent material from spilling onto the top surface of the sealing cover 17 during feeding. A dust cover can be added to the upper port of the feed hopper 18 to prevent external impurities from entering during the drying process. The discharge control component includes a discharge baffle 22 and a slide rail. The slide rail consists of two parallel stainless steel grooved tracks, which are welded to the upper and lower edges of the discharge port at the bottom of the drying chamber 1 and extend radially along the drying chamber 1. The discharge baffle 22 is made of stainless steel plate (the size matches the discharge port), and its two sides are embedded in the slide rail, allowing it to slide horizontally along the slide rail. A hand handle is welded to the outer end of the baffle, and the operator can control the opening (baffle pull-out) or blocking (baffle insertion) of the discharge port by pushing the handle, making the operation convenient.

[0015] The core of the drying device includes a main rotating shaft 2, a hot air duct 4, and a hot air conveying structure. The main rotating shaft 2 is a solid stainless steel shaft, set along the central axis of the drying chamber 1. Its top end is connected to the output shaft of the drive motor 6 via a coupling, and its bottom end is rotatably connected to the funnel-shaped inner wall of the bottom of the drying chamber 1 via a bearing seat. A hot air chamber 3 is axially formed inside the main rotating shaft 2. The top end of the hot air chamber 3 is closed, and the bottom end extends to the lower part of the main rotating shaft 2, ensuring that the hot air can cover the entire height range of the drying chamber 1. There are multiple sets of hot air ducts 4, each set including multiple stainless steel pipes, evenly distributed circumferentially along the outer periphery of the main rotating shaft 2 and spaced apart axially along the main rotating shaft 2. One end of each hot air duct 4 is rotatably connected to the outer wall of the main rotating shaft 2 via a bearing and communicates with the hot air chamber 3 (a communication hole is opened at the corresponding position of the main rotating shaft 2), and the other end is closed. Hot air outlets 5 are evenly formed along the length of the arc surface of the hot air duct 4, and hot air can be evenly blown from the hot air outlets 5 to the surrounding lime powder.

[0016] The air intake auxiliary assembly is used to deliver hot air to the hot air chamber 3 and drive the main rotating shaft 2 to rotate. It includes a drive motor 6, a hot air blower 7, an air guide pipe 8, and an air collecting ring 9. The drive motor 6 is a stepper motor, which is fixed to the middle of the top surface of the sealing cover plate 17 by a motor bracket. Its output shaft vertically downwards through the sealing cover plate 17 (a sealed bearing is installed at the penetration point), and is coaxially fixed to the top of the main rotating shaft 2 by a coupling. After starting, it can drive the main rotating shaft 2 to rotate uniformly around its own axis. The hot air blower 7 is an electrically heated hot air blower, which is fixed to one side of the top surface of the sealing cover plate 17. Its air outlet is sealed to one end of the air guide pipe 8 by a metal clamp. The air guide pipe 8 is a high-temperature resistant silicone tube. One end is connected to the air outlet of the hot air blower 7, and the other end vertically downwards through the sealing cover plate 17 (a sealing ring is installed at the penetration point), extending into the interior of the drying chamber 1 and communicating with the air collecting ring 9. The gas collecting ring 9 is a ring structure made of stainless steel and is fixed to the bottom surface of the sealing cover plate 17 by a bracket. One side of the ring has a reserved interface for sealing and welding to the end of the air guide pipe 8. The inner ring of the gas collecting ring 9 is rotatably connected to the outer circumferential arc surface of the top of the main rotating shaft 2 through a sealed bearing to ensure that the gas collecting ring 9 remains fixed and does not leak hot air when the main rotating shaft 2 rotates. The main rotating shaft 2 has an air inlet hole 10 (multiple holes are evenly opened along the circumference) at the position corresponding to the gas collecting ring 9. The hot air in the gas collecting ring 9 can enter the hot air chamber 3 through the air inlet hole 10.

[0017] The stirring device works in conjunction with the hot air duct 4 to drive the hot air duct 4 to rotate and agitate the lime powder, preventing material from clumping. It includes stirring blades 11, driven shaft 12, drive bevel gear 13, drive shaft 14, drive bevel gear 15, and a pneumatic turbine 16. Each hot air duct 4 has two stainless steel stirring blades welded to its outer circumferential arc surface. The two blades are symmetrically distributed, and their edges are polished (to avoid scratching the inner wall of the drying chamber). As the hot air duct 4 rotates, they agitate the surrounding lime powder, breaking up the material's stratification. The driven shaft 12 is made of stainless steel and is coaxially welded to the inner wall of the hot air duct 4 near the main rotating shaft 2. Its end away from the hot air duct 4 extends into the hot air chamber 3 and is coaxially fixed with the drive bevel gear 13. Both the first transmission bevel gear 13 and the second transmission bevel gear 15 are made of metal. The first transmission bevel gear 13 is coaxially fixed to the end of the driven shaft 12, and the second transmission bevel gear 15 is coaxially fixed to the middle of the transmission shaft 14. The two mesh with each other, which can transmit the rotational power of the transmission shaft 14 to the driven shaft 12. The transmission shaft 14 is made of stainless steel and is arranged radially along the main rotation shaft 2. Its two ends are rotatably connected to the inner wall of the hot air chamber 3 through bearings to ensure flexible rotation. The wind turbine 16 is made of plastic and is coaxially fixed to one end of the transmission shaft 14 (on the side closer to the axis of the hot air chamber 3). When hot air is introduced into the hot air chamber 3, the hot air drives the wind turbine 16 to rotate, which in turn drives the transmission shaft 14 to rotate synchronously.

[0018] Working principle: Turn on the power of the device via the operation panel 20, check whether the drive motor 6 and hot air blower 7 are running normally, fully insert the discharge baffle 22 into the slide rail to block the bottom discharge port of the drying chamber 1, open the dust cover on the feed funnel 18, and put the lime powder to be dried into the drying chamber 1 through the feed funnel 18 (the amount put in should not exceed 2 / 3 of the volume of the drying chamber to avoid material overflow). After the material is put in, close the dust cover. Start the hot air blower 7 via the operation panel 20, set the air outlet temperature (adjust according to the moisture content of the lime powder), and the hot air generated by the hot air blower 7 is delivered to the air collecting ring 9 through the air guide pipe 8, and then enters the hot air chamber 3 through the air inlet 10 on the main rotating shaft 2. The hot air diffuses axially in the hot air chamber 3 and is finally blown evenly into the lime powder in the drying chamber 1 through the hot air outlet 5 on each hot air duct 4 to heat and dry the material. The drive motor 6 is started synchronously, and the speed is set. The output shaft of the drive motor 6 drives the main rotating shaft 2 to rotate around its own axis. The main rotating shaft 2 further drives all the outer hot air ducts 4 to revolve around the central axis of the drying chamber 1, so that the hot air outlets 5 on the hot air ducts 4 can cover all areas inside the drying chamber 1, avoiding incomplete drying of local materials. When the hot air flows in the hot air chamber 3, it drives the wind turbine 16 to rotate. The wind turbine 16 drives the transmission shaft 14 to rotate synchronously. The transmission bevel gear 15 on the transmission shaft 14 meshes with the transmission bevel gear 13 on the driven shaft 12, transmitting the rotational power to the driven shaft 12, which in turn drives the hot air duct 4 to rotate around its own axis. When the hot air duct 4 rotates, its outer stirring blades 11 rotate synchronously, turning over the surrounding lime powder, so that the middle and lower layers of material can fully contact the hot air, solving the problem of sufficient drying of the upper layer and insufficient drying of the middle and lower layers. The drying time is set according to the drying requirements of lime powder. After drying, the hot air blower 7 and drive motor 6 are turned off through the operation panel 20. After the temperature inside the drying chamber 1 drops to room temperature, the operator holds the handle on the discharge baffle 22 and pulls the baffle out along the slide rail. The dried lime powder is discharged from the bottom discharge port under gravity and can be collected for subsequent processing or storage. After each drying operation, the sealing cover 17 is opened (by removing the bolts between the cover and the drying chamber). The operator can climb to the top of the drying chamber 1 through the maintenance ladder 19 to clean the lime powder adhering to the hot air duct 4 and the stirring blades 11 on the inner wall of the drying chamber (compressed air can be used to blow it or a soft brush can be used to wipe it). The meshing of the transmission bevel gear 13 and the transmission bevel gear 2 15 is checked regularly. Lubricating oil is added if necessary to ensure smooth transmission. The sealing performance of each sealing part (such as the connection between the air collecting ring and the main rotating shaft, and the connection between the air guide pipe and the hot air blower) is checked. If the sealing gasket is aged, it should be replaced in time to avoid hot air leakage.

Claims

1. A drying apparatus for processing lime powder, characterized in that, The equipment includes a drying chamber (1), which is a vertical cylindrical structure with a detachable sealing cover (17) at the top opening and a discharge port at the bottom. The feeding assembly includes a feeding funnel (18) fixed to the top surface of the sealing cover (17). The lower end of the feeding funnel (18) penetrates the sealing cover (17) and communicates with the interior of the drying chamber (1) for feeding lime powder into the drying chamber (1). The discharge control assembly includes a discharge baffle (22) slidably inserted at the discharge port at the bottom of the drying chamber (1). The discharge baffle (22) can slide horizontally along the radial direction of the drying chamber (1) to open or block the discharge port. The drying device is installed inside the drying chamber (1). The unit includes a main rotating shaft (2) arranged along the central axis of the drying chamber (1). The main rotating shaft (2) has a through hot air chamber (3) axially opened inside. Multiple hot air ducts (4) are rotatably connected to its outer circumferential arc surface along the circumferential and axial directions. Each hot air duct (4) is connected to the inside of the hot air chamber (3). The arc surface of the hot air duct (4) has multiple hot air outlets (5) for discharging hot air. An air intake auxiliary component is arranged between the sealing cover plate (17) and the main rotating shaft (2) for conveying hot air into the hot air chamber (3) and driving the main rotating shaft (2) to rotate. A stirring device is arranged in cooperation with the hot air duct (4) for driving the hot air duct (4) to rotate to agitate the lime powder material.

2. The drying apparatus for lime powder processing according to claim 1, characterized in that, The air intake auxiliary component includes a drive motor (6), which is fixedly installed in the middle of the top surface of the sealing cover (17). Its output shaft passes vertically downward through the sealing cover (17) and is coaxially fixedly connected to the top of the main rotating shaft (2) to drive the main rotating shaft (2) to rotate around its own axis. The hot air blower (7) is fixedly installed on the top surface of the sealing cover (17) to generate dry hot air. One end of the air guide pipe (8) is sealed and connected to the air outlet of the hot air blower (7), and the other end passes through the sealing cover (17) and extends into the drying chamber (1). The air collecting ring (9) has a ring structure, is fixed to the bottom surface of the sealing cover (17) and is sealed and connected to the end of the air guide pipe (8). The inner ring of the air collecting ring (9) is rotatably sealed and connected to the outer arc surface of the top of the main rotating shaft (2) to guide the hot air delivered by the hot air blower (7) to the main rotating shaft (2).

3. The drying apparatus for lime powder processing according to claim 2, characterized in that, The outer circumferential arc surface at the top of the main rotating shaft (2) is provided with multiple air inlets (10) evenly distributed along the circumference, corresponding to the position of the air collecting ring (9). One end of the air inlet (10) is connected to the interior of the air collecting ring (9), and the other end is connected to the interior of the hot air chamber (3), so that the hot air in the air collecting ring (9) can enter the hot air chamber (3) through the air inlet (10).

4. The drying apparatus for lime powder processing according to claim 3, characterized in that, The stirring device includes multiple stirring blades (11). At least two stirring blades (11) are fixedly connected to the outer circumferential arc surface of each hot air duct (4). The stirring blades (11) are distributed at intervals along the length of the hot air duct (4) and are used to turn over the lime powder in the drying chamber (1) when the hot air duct (4) rotates.

5. The drying apparatus for lime powder processing according to claim 4, characterized in that, The driven shaft (12) is coaxially fixed to the inner wall of the hot air duct (4) near the main rotating shaft (2), and the driven shaft (12) extends away from the hot air duct (4) into the hot air chamber (3).

6. The drying apparatus for lime powder processing according to claim 5, characterized in that, The first transmission bevel gear (13) is coaxially fixed to one end of the driven shaft (12) extending into the hot air chamber (3). The transmission shaft (14) is arranged radially along the main rotating shaft (2), and its two ends are rotatably connected to the inner wall of the hot air chamber (3). The axis of the transmission shaft (14) is perpendicular to the axis of the driven shaft (12). The second transmission bevel gear (15) is coaxially fixed to the middle of the transmission shaft (14), and the second transmission bevel gear (15) meshes with the first transmission bevel gear (13) to transmit power. The wind turbine (16) is coaxially fixed to one end of the transmission shaft (14), and the wind turbine (16) is located inside the hot air chamber (3) to drive the transmission shaft (14) to rotate under the push of the hot air in the hot air chamber (3).

7. The drying apparatus for lime powder processing according to claim 6, characterized in that, The outer circumferential arc surface of the drying chamber (1) is fixedly connected to a maintenance ladder (19), which extends along the height direction of the drying chamber (1) and is used for workers to climb to the sealing cover (17) for maintenance. The outer circumferential arc surface of the drying chamber (1) is also fixedly installed with an operation panel (20), which is electrically connected to the drive motor (6) and the hot air blower (7) respectively, and is used to control the operation of the device. The outer circumference of the drying chamber (1) is also fixedly connected to a support frame (21), which is evenly distributed along the circumference of the drying chamber (1) and is used to support the drying chamber (1) to maintain a vertical and stable state.

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