Spin flash dryer for sodium bicarbonate

Abstract

According to the technical scheme, the sodium bicarbonate rotating flash drying machine comprises a drying chamber, a feeding port is formed in the side wall of the drying chamber, a rotating shaft is movably arranged at the bottom of the drying chamber, a rotating motor used for driving the rotating shaft is arranged on the outer wall of the bottom of the drying chamber, and the end, close to the bottom, of the rotating shaft is connected with a rotating disc in a sleeved mode. Flying assisting blocks are arrayed along the circle center of the rotating disc, the rotating shaft is sleeved with a crushing assembly, the other end of the rotating shaft is connected with a rotary material suction mechanism, a discharging opening is formed in the top of the drying chamber, an air opening is formed in the side wall of the drying chamber, and the rotary material suction mechanism comprises a connecting block connected with the top end of the rotating shaft. And rotating blades are arrayed along the center of the connecting block, and the tops of the rotating blades are connected with a discharging cavity, so that the problems that the through holes are blocked by materials and a large amount of materials are adhered to the bottom are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying, in particular to a sodium bicarbonate rotary flash drying machine. Background Art

[0002] Sodium bicarbonate is also called baking soda in daily life. Sodium bicarbonate is an alkaline substance. The molecular formula of sodium bicarbonate is NaHCO3. It is an inorganic salt, white crystalline powder, odorless, alkaline, and easily soluble in water. The application fields of sodium bicarbonate include laboratories, industrial fields, food processing fields, agriculture and animal husbandry fields, and medical fields. Because sodium bicarbonate is easily soluble in water, a dryer is needed to dry sodium bicarbonate. At present, rotary flash drying is mostly used for drying sodium bicarbonate.

[0003] For example, Chinese patent CN216770051U discloses a rotary flash dryer, in which the filter element is installed on the shell and the body by design, the crushing teeth 2 of the crushing assembly cooperate with the crushing teeth 1 on the body to crush the raw materials, the raw materials are dried under the guidance of the induced draft fan and the heating of the heater, and the induced draft fan blows the qualified raw materials through the filter element to enter the collection chamber, and the cleaning brush of the crushing assembly cleans the filter element by rotation. The disadvantage is that a large amount of materials cannot enter the collection chamber after the crushing and drying process because the through hole is located on the upper side wall of the collection chamber. When the material moves toward the through hole, a large amount of material will inevitably rush toward the through hole. When a large amount of material gathers together at the through hole, the through hole will be blocked due to overcrowding. The cleaning brush designed by the patent can only break it up instantly. When the cleaning brush leaves, a large amount of material is still blocked at the through hole, making it impossible for the material to pass through the through hole to reach the gathering chamber. In addition, when more and more material is put in, a large amount of material will accumulate at the bottom, causing a large amount of material to stick together, thereby seriously affecting the drying process of the material by the device. Utility Model Content

[0004] In view of the deficiencies of the comparative literature, the utility model provides a sodium bicarbonate rotary flash drying machine, which has the advantages of fully drying the material, allowing all the materials to pass smoothly through the discharge port, and being able to screen the sodium bicarbonate with qualified volume moisture, thereby solving the problems of material clogging in the through hole and a large amount of material sticking to the bottom.

[0005] The utility model provides the following technical scheme: a sodium bicarbonate rotary flash drying machine comprises a drying chamber, a feeding port is provided on a side wall of the drying chamber, a rotating shaft is movably provided on the bottom of the drying chamber, a rotating motor for driving the rotating shaft is provided on the outer wall of the bottom of the drying chamber, a rotating disk is sleeved on one end of the rotating shaft close to the bottom, a flying block is arranged along the center array of the rotating disk, a crushing assembly is sleeved on the rotating shaft, a rotating suction mechanism is connected to the other end of the rotating shaft, a discharging port is provided on the top of the drying chamber, an air outlet is provided on the side wall of the drying chamber, the rotating suction mechanism comprises a connecting block connected to the top end of the rotating shaft, rotating blades are arranged along the center array of the connecting block, and a discharging cavity is connected to the top of the rotating blades.

[0006] Preferably, the flight-assisting block is close to the edge of the rotating disk, and the side wall it contacts during clockwise rotation is in a smooth arc shape.

[0007] Preferably, the crushing assembly comprises crushing bars arranged along the central axis of the rotating shaft, the crushing bars are inclined on both sides, the top ends of the crushing bars are connected to brushes, and saw teeth are provided on the upper and lower wall end surfaces of the crushing bars.

[0008] Preferably, a cylindrical gap is formed on the side wall of the rotating blade near the central axis of the drying chamber, the overall shape formed by the rotating blades is a truncated cone, and the rotating blade is a curved plate bent clockwise, and the surface of the rotating blade is provided with a raised block as appropriate.

[0009] Preferably, the level of the feed port is higher than the level of the top of the crushing assembly, and the air port is close to the bottom of the drying chamber.

[0010] Preferably, the discharge chamber is located in a cylindrical gap, a gap is left between the rotating blade and the top of the drying chamber, the rotating blade and the discharge chamber are fixedly connected, and the discharge chamber and the drying chamber are movably connected.

[0011] Compared with the comparative literature, the utility model has the following beneficial effects:

[0012] 1. By setting up the rotary suction mechanism, it can be ensured that the sodium bicarbonate will not be blocked at the discharge port when passing through the discharge port. At the same time, the rotary suction mechanism can further screen the volume and moisture content of the sodium bicarbonate, thereby ensuring that the sodium bicarbonate passing through the discharge port is fully crushed and dried particles.

[0013] 2. Through the setting of the rotating disk and the flying blocks, when the larger particle clusters accumulated at the bottom of the drying chamber come into contact with the flying blocks, they can be moved upward in coordination with the upward centrifugal force and the rotating wind field, thereby achieving full crushing and drying of the particle clusters in the drying chamber.

[0014] 3. The brush at the top of the crushing rod can clean the particles of sodium bicarbonate just added into the drying chamber and adhere to the inner wall of the drying chamber in time after being struck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is the right view of the utility model;

[0016] Figure 2 This is a cross-sectional view of the overall structure of the utility model;

[0017] Figure 3 It is the left view of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal structure of the utility model;

[0019] Figure 5 This is a front view of the internal structure of the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the rotary material suction mechanism of the utility model;

[0021] Figure 7 This is a schematic diagram of the structure of the crushing component of the utility model.

[0022] In the figure: 1. Drying chamber; 2. Feeding port; 3. Rotating shaft; 4. Rotating motor; 5. Rotating disk; 6. Flight-assisting block; 7. Crushing assembly; 711. Crushing rod; 712. Brush; 713. Sawtooth; 8. Rotating suction mechanism; 811. Connecting block; 812. Rotating blade; 813. Discharging chamber; 9. Discharging port; 10. Air outlet. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 1-Figure 6A sodium bicarbonate rotary flash drying machine comprises a drying chamber 1, a feeding port 2 is provided on the side wall of the drying chamber 1, a rotating shaft 3 is movably provided at the bottom of the drying chamber 1, a rotating motor 4 for driving the rotating shaft 3 is provided on the outer wall of the bottom of the drying chamber 1, a rotating disk 5 is sleeved on one end of the rotating shaft 3 near the bottom, and a flying block 6 is arranged along the center of the rotating disk 5, a crushing component 7 is sleeved on the rotating shaft 3, and a rotating material suction mechanism 8 is connected to the other end of the rotating shaft 3, a discharging port 9 is provided on the top of the drying chamber 1, and an air outlet 10 is provided on the side wall of the drying chamber 1. The material mechanism 8 includes a connecting block 811 connected to the top of the rotating shaft 3, and a rotating blade 812 is arranged along the center array of the connecting block 811. The top of the rotating blade 812 is connected to a discharge cavity 813. The horizontal height of the feed port 2 is higher than the horizontal height of the top of the crushing component 7. This arrangement ensures that the material put into the drying chamber 1 can be immediately crushed during the falling process. The air outlet 10 is close to the bottom of the drying chamber 1. This arrangement ensures that when the hot air enters the drying chamber 1, it can rise from the bottom in a spiral shape.

[0025] A cylindrical gap is formed on the side wall of the rotating blade 812 at one end near the central axis of the drying chamber 1. The cylindrical gap cooperates with the discharge cavity 813 to deliver a large amount of sodium bicarbonate out of the drying chamber 1 at one time. The overall shape formed by the rotating blades 812 is a truncated cone, and the rotating blades 812 are curved plates that are curved clockwise. This arrangement ensures that the rotational wind direction of the small rotating wind field generated when the rotating blades 812 rotate is consistent, so that the sodium bicarbonate moving toward the rotating suction mechanism 8 can more easily enter the cylindrical gap and break out of the discharge port 9 through the discharge cavity 813. The surface of the rotating blade 812 is provided with a raised block as appropriate. The setting of the raised block ensures that the sodium bicarbonate can be further crushed when entering between the rotating blades 812, thereby ensuring that the sodium bicarbonate that can pass through the discharge port 9 meets the required requirements.

[0026] The flying block 6 is close to the edge of the rotating disk 5, and the side wall of the flying block 6 is in a smooth arc shape. This arrangement is because when the drying chamber 1 is working, the rotating disk 5 is in a rotating state, and the materials falling onto the rotating disk 5 are gathered to the edge of the rotating disk 5 by the action of centrifugal force. The materials located at the edge of the rotating disk 5 move with the rotating wind field and the rotating disk 5. When the materials roll to the smooth side wall of the flying block 6, the centrifugal force of the materials obliquely moves upward with the rotating wind field, so that the sodium bicarbonate at the bottom can be fully dried and crushed.

[0027] The discharge chamber 813 is located in the cylindrical gap, and a gap is left between the rotating blade 812 and the top of the drying chamber 1. The rotating blade 812 and the discharge chamber 813 are fixedly connected, and the discharge chamber 813 and the drying chamber 1 are movably connected.

[0028] See also Figure 7The crushing assembly 7 includes crushing rods 711 arranged along the central axis of the rotating shaft 3. The crushing rods 711 are inclined on both sides. This arrangement can ensure that the sodium bicarbonate particle group can be easily broken up. A brush 712 is connected to the top of the crushing rod 711. The arrangement of the brush 712 ensures that the sodium bicarbonate adhering to the inner wall of the drying chamber 1 can be cleaned up in time. Saw teeth 713 are provided on the upper and lower walls of the crushing rod 711. This arrangement can fully crush the particle group that is dry on the outside and wet on the inside when the crushing rod 711 rotates at a high speed.

[0029] Working principle: In the actual working process, the heated air is first blown into the air port 10, and the sodium bicarbonate to be dried is added into the drying chamber 1 through the feed port 2. At the same time, the rotating motor 4 drives the rotating shaft 3 to rotate, and the rotating shaft 3 drives the rotating disk 5, the crushing component 7 and the rotating suction mechanism 8 to rotate clockwise. The high-speed rotation of the crushing component 7 forms a strong rotating wind field in the drying chamber 1. Because the crushing rod 711 on the crushing component 7 is rotating at a high speed, the large particles are continuously crushed, so that the particles that are dry outside and wet inside are continuously peeled off and crushed, and the surface is continuously renewed, which increases the heat exchange area, thereby strengthening the mass and heat exchange and improving the drying rate;

[0030] In the middle of the drying chamber 1, sodium bicarbonate is continuously added through the feed port 2. At the same time, the sodium bicarbonate particles are crushed by the crushing assembly 7 below and then blown up by the high-speed rotating hot air, forming a relatively stable fluidized layer in the drying chamber 1. The material and the hot air exchange heat and moisture rapidly and fully. The sodium bicarbonate particles with high moisture content sink in the drying chamber 1 because their gravity is greater than their buoyancy and are continuously dried during the sinking process. When they move to the bottom, they are further crushed and dried by the crushing rod 711 and the impact of the high-speed airflow. At this time, their gravity is less than their buoyancy, and the particles begin to move upward;

[0031] At the upper part of the drying chamber 1, the rotating suction mechanism 8 rotates along with the rotating shaft 3 to form a small rotating wind field at the upper part of the drying chamber 1. The sodium bicarbonate is moved toward the small rotating wind field by the airflow gravity of the small rotating wind field. Due to the centrifugal force, the rotation radius of the bulky sodium bicarbonate and the sodium bicarbonate that does not meet the moisture requirement increases due to the centrifugal force. When its rotation radius is larger than the rotating suction mechanism 8, it is blocked in the drying chamber 1 for further drying and crushing. Among them, the sodium bicarbonate with a smaller particle size and that meets the moisture requirement is subject to a smaller centrifugal force, and its rotation radius is smaller than the radius of the rotating suction mechanism 8, so it passes through the gap between the rotating blades 812 and follows the small rotating wind field generated by the rotating suction mechanism 8 through the discharge cavity 813 and the discharge port 9 for the next step of processing.

Claims

1. A sodium bicarbonate rotary flash dryer, comprising a drying chamber (1), characterized in that: The drying chamber (1) has a feed inlet (2) on its side wall, a rotating shaft (3) is movably provided at the bottom of the drying chamber (1), a rotating motor (4) for driving the rotating shaft (3) is provided on the outer wall of the bottom of the drying chamber (1), a rotating disk (5) is sleeved on one end of the rotating shaft (3) close to the bottom, a flying block (6) is arranged along the center of the rotating disk (5), a crushing assembly (7) is sleeved on the rotating shaft (3), a rotating material suction mechanism (8) is connected to the other end of the rotating shaft (3), a discharge port (9) is provided at the top of the drying chamber (1), an air outlet (10) is provided on the side wall of the drying chamber (1), the rotating material suction mechanism (8) comprises a connecting block (811) connected to the top of the rotating shaft (3), rotating blades (812) are arranged along the center of the connecting block (811), and the top of the rotating blades (812) is connected to a discharge cavity (813).

2. A sodium bicarbonate rotary flash drying machine according to claim 1, characterized in that: The flight-assisting block (6) is close to the edge of the rotating disk (5), and the side wall of the flight-assisting block (6) is in a smooth arc shape.

3. A sodium bicarbonate rotary flash drying machine according to claim 1, characterized in that: The crushing assembly (7) comprises crushing rods (711) arranged along the central axis of the rotating shaft (3), the crushing rods (711) are inclined on both sides, the ends of the crushing rods (711) are connected to brushes (712), and saw teeth (713) are provided on the upper and lower wall end surfaces of the crushing rods (711).

4. A sodium bicarbonate rotary flash drying machine according to claim 1, characterized in that: A cylindrical gap is formed on the side wall of one end of the rotating blade (812) close to the central axis of the drying chamber (1); the overall shape formed by the rotating blades (812) is a truncated cone; the rotating blades (812) are curved plates that are curved in a clockwise direction; and the surface of the rotating blades (812) is provided with protrusions as appropriate.

5. A sodium bicarbonate rotary flash drying machine according to claim 1, characterized in that: The level of the feed port (2) is higher than the level of the top of the crushing assembly (7), and the air port (10) is close to the bottom of the drying chamber (1).

6. A sodium bicarbonate rotary flash drying machine according to claim 4, characterized in that: The discharge chamber (813) is located in the cylindrical gap, and the rotating blade (812) is connected to the drying chamber (1). There is a gap between the tops, and the rotating blades (812) and the discharge chamber (813) are fixedly connected. The discharge chamber (813) and the drying chamber (1) are movably connected.

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