Integrated apparatus for drying and classifying of table salt based on fluidized bed

Abstract

The application discloses a kind of based on fluidized bed's table salt drying and screening classification integrated device. Including box, the lower part of one side of box is equipped with the air inlet that is communicated with hot air fan, the top of box is open, the middle part in box is equipped with horizontal material plate, the both ends of the box above material plate are equipped with feeding port and discharge port respectively;The upper cover of box is equipped with lifting cover, the vertical partition that lifting cover is divided into two chambers is fixedly connected in lifting cover, the top of lifting cover in each chamber is equipped with the vertical lifting pipeline that is communicated with the chamber respectively, lifting pipeline is equipped with fixed pipeline, fixed pipeline is communicated with the inlet of cyclone separator, the outlet of cyclone separator is installed fan, the inner wall of the lower port of lifting cover and fixed pipeline is equipped with air seal ring;The outside of lifting cover is equipped with guide mechanism and lifting drive mechanism. The application separates different levels of powder salt and small particle salt by adjusting the height of lifting cover, and screening classification is carried out while drying.

Description

Technical Field

[0001] This invention relates to salt sorting equipment, and in particular to an integrated device for salt drying and sieving and grading based on a fluidized bed. Background Technology

[0002] In the production process of table salt, raw salt goes through processes such as crushing, washing, drying, and screening. Screening equipment classifies the salt according to the particle size required by the user. The content of powdered salt and small particle salt determines the grade of table salt. After washing, the raw salt is first dried and then enters the grading and screening process. The entire production process requires two sets of equipment for drying and screening, which are costly and require a large investment.

[0003] Chinese prior art patent with authorization announcement number CN210242170U discloses an adjustable height fluidized bed. This utility model discloses a guide rail, a lifting mechanism, a winch frame, and a roller. The motor is fixed on the fluidized bed by a support frame, and the height of the drying base plate is adjustable. This utility model can only be used for drying various materials and cannot be used for grading materials, especially salt. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems and provides an integrated device for drying and sieving and grading salt based on a fluidized bed, which completes sieving and drying in one set of equipment, thereby reducing costs.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows:

[0006] An integrated device for drying and grading salt based on a fluidized bed includes a hot air blower and a rectangular box body mounted on a base. An air inlet connected to the hot air blower is located on the lower part of one side of the box body. The top of the box body is open, and a horizontal material plate is located in the middle of the box body. Inlet and outlet ports are located at both ends of the box body above the material plate, respectively. A lifting hood is installed above the box body. A vertical partition is fixed inside the lifting hood, dividing it into two chambers. Each chamber's lifting hood has a vertical lifting pipe connected to that chamber at its top. A fixed pipe is fitted outside the lifting pipe and connected to the inlet of a cyclone separator. An induced draft fan is installed at the outlet of the cyclone separator. Airtight rings are provided on the inner walls of the lower ends of both the lifting hood and the fixed pipe. A guide mechanism and a lifting drive mechanism are provided on the outer side of the lifting hood.

[0007] Compared with the prior art, the present invention, which adopts the above technical solution, has the following beneficial effects:

[0008] Hot air heats the raw salt containing a large amount of water on the material plate. The water turns into steam when heated. Under the pressure of the hot air and the negative pressure of the induced draft fan, the powdered salt and small granular salt in the raw salt float up. The powdered salt and small granular salt float at different heights in the chamber. By adjusting the height of the lifting hood, the steam, powdered salt, and small granular salt at different heights are drawn into the cyclone separator. The steam is discharged, and the powdered salt and small granular salt are separated in the cyclone separator. According to the salt grade required by the user, the powdered salt and small granular salt of different particle sizes are selected and the salt is screened and graded. Using a set of equipment to perform screening and grading at the same time as drying saves equipment investment and reduces equipment procurement costs.

[0009] Furthermore, the optimized solution of the present invention is:

[0010] The guiding mechanism includes guide posts and guide sleeves. The two guide sleeves are respectively fixed to the outer side of the lifting cover. The two vertical guide posts are slidably engaged with the guide sleeves. The lower end of the guide posts is fixed to the base.

[0011] The guiding mechanism includes two guide rail pairs, with the slider of each guide rail pair fixed to the outer side of the lifting cover, and the guide rails vertically mounted on the guide rail base.

[0012] The lifting drive mechanism includes a rack, a gear, and a servo motor. The rack is fixed to the outer side of the lifting cover, and the servo motor is equipped with a gear that meshes with the rack.

[0013] The lifting cover includes a cap and a rectangular cylindrical part, which is fitted onto the outside of the housing.

[0014] The lower port of the lifting hood has four interconnected grooves on its inner walls, and the gas sealing ring is embedded in the grooves; the lower port of the lifting pipe has an annular groove for embedding the gas sealing ring; the gas sealing ring is connected to a sealing pipe equipped with a solenoid valve.

[0015] The outer wall of the upper port of the housing is provided with a sealing ring with a rectangular cross section, and the outer wall of the upper port of the lifting pipe is provided with a sealing ring with a circular cross section.

[0016] The lifting drive mechanism includes a servo cylinder and an electro-hydraulic servo valve. A first lug is fixedly connected to the outside of the lifting cover. The first lug is hinged to the piston rod of the servo cylinder. A connecting trunnion is provided in the middle of the cylinder body of the servo cylinder. The connecting trunnion is connected to a second lug. The second lug is fixedly connected to the housing. The servo cylinder is controlled by the electro-hydraulic servo valve. The displacement sensors of the electro-hydraulic servo valve and the servo cylinder are electrically connected to the control system.

[0017] Silicone plates are installed on the inner wall of the lifting cover and on the two sides of the partition.

[0018] The gas seal and the sealing ring are made of silicone. Attached Figure Description

[0019] Figure 1 This is a top view of Embodiment 1 of the present invention;

[0020] Figure 2 yes Figure 1 AA section view;

[0021] Figure 3 Yes Figure 2 The left view;

[0022] Figure 4 yes Figure 3 BB section view;

[0023] Figure 5 This is a schematic diagram of the connection between the housing and the hot air blower in Embodiment 1 of the present invention;

[0024] Figure 6 yes Figure 2 Enlarged view of point C;

[0025] Figure 7 yes Figure 3 Enlarged view of point D;

[0026] Figure 8 This is a front view of Embodiment 2 of the present invention;

[0027] In the diagram: 1. Housing; 1-1. Air inlet; 1-2. Feed hopper; 1-3. Discharge hopper; 1-4. Base; 1-5. Silicone sealing ring; 2. Material plate; 3. Lifting cover; 3-1. Cylinder; 3-2. Cap; 4. Partition; 5. First air seal ring; 6. Air seal pipeline; 7. Solenoid valve; 8. Lifting pipeline; 9. Fixed pipeline; 10. Second air seal ring; 11. Cyclone separator; 11. Frame; 11-1. Collection device; 11-2. Exhaust fan; 12. Guide sleeve; 13. Guide column; 14. Rack; 15. Gear; 16. Servo motor; 17. Hot air fan; 18. Slider; 19. Guide rail; 20. Servo cylinder; 21. Connecting trunnion; 21-1. First ear seat; 22. Pin; 22-1. Second ear seat; 23. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] See Figures 1-5This embodiment is an integrated device for drying and grading salt based on a fluidized bed, mainly composed of a box 1, a material plate 2, a lifting hood 3, a partition 4, a lifting pipe 5, a fixed pipe 6, a cyclone separator 7, a lifting mechanism, and a guiding mechanism. The box 1 is rectangular with an open top and is mounted on a base 1-4. The lower part of the front side plate of the box 1 has four air inlets, and each pair of air inlets is connected to a hot air blower 18 through an air duct. The material plate 2 is welded to the middle of the box 1. The material plate 2 is horizontally positioned above the air inlets. The front and rear side plates of the box 1 above the material plate 2 are respectively provided with air outlet pipes connected to the air inlets, and hot air is blown out from the air outlet pipes. The right and left end plates of the box 1 have a feed inlet and a discharge outlet, respectively, both located above the material plate 2. The feed inlet is equipped with a feed hopper 1-2, and the discharge outlet is equipped with a discharge hopper 1-3. The upper part of the outer walls of the two end plates and two side plates of the housing 1 are machined with continuous grooves. Rectangular sealing rings 1-5 are installed within these grooves, and the sealing rings 1-5 are made of silicone. A feeding shaft is installed inside the feed hopper 1-2. Both ends of the feeding shaft are connected to the side plates of the feed hopper 1-2 via bearing seats. A feeding plate is installed on the feeding shaft of the feed hopper 1-2, and the feeding shaft is driven by a feeding motor. The structures of the material plate 2, feed hopper 1-2, discharge hopper 1-3, feeding shaft, and hot air fan 18 are all the same as those of a fluidized bed.

[0031] A lifting cover 3 covers the top of the housing 1. The lifting cover 3 is composed of a cylindrical part 3-1 and a cap part 3-2. The cross-section of the cylindrical part 3-1 is rectangular, and the cap part 3-2 is welded to the upper end of the cylindrical part 3-1. The cylindrical part 3-1 is fitted onto the housing 1. A vertical partition 4 is provided inside the lifting cover 3. The upper end of the partition 4 is welded to the top plate of the lifting cover 3. The partition 4 is arranged along the width direction of the housing 1, and the partition 4 divides the lifting cover 3 into two chambers. The four inner walls at the lower end of the cylindrical part 3-1 are machined with continuous grooves. The grooves of the four inner walls are closed, and a first airtight ring 5 is embedded in the groove. Figure 6 As shown), the air inlet pipe of the first air seal ring 5 passes through the inner wall of the cylinder 3-1 and connects with the air seal pipeline 6, and the air seal pipeline 6 is equipped with a solenoid valve 7.

[0032] Each chamber of the lifting hood 3 has a round hole in its top plate, and a vertical lifting pipe 8 is welded to the top plate outside each round hole. A vertical fixed pipe 9 is fitted onto the lifting pipe 8. The lower inner wall of the fixed pipe 9 has an annular groove, and a second airtight ring 10 is embedded in the groove. Figure 7 As shown), the air inlet pipe of the second airtight ring 10 passes through the side wall of the fixed pipe 9 and connects to the airtight pipe 6. The upper ends of the two fixed pipes 9 are respectively connected to the tangential inlets of the two cyclone separators 11 through elbows. Each cyclone separator 11 is mounted on the frame 11-1. The air outlet at the top of the cyclone separator 11 is connected to the inlet of the induced draft fan 12 through a pipe, and the outlet at the bottom of the cyclone separator 11 is connected to the collection device 11-2.

[0033] A guide mechanism is provided on the outer side of the lifting cover 3. The guide mechanism consists of two guide sleeves 13 and two guide posts 14. The two guide sleeves 13 are welded to both ends of the lifting cover 3 through connecting plates. The two guide sleeves 13 slide in engagement with the two vertical guide posts 14. The lower ends of the guide posts 14 are mounted on the base 1-4. The lifting stroke of the lifting cover 3 is 2 meters. A lifting drive mechanism is provided between the two guide posts 14. The lifting drive mechanism consists of a rack 15, a gear 16, and a servo motor 17. The upper part of the rack 15 is connected to the cap 3-2 of the lifting cover 3 by bolts, and the lower part of the rack 15 is connected to the cylindrical part 3-1 of the lifting cover 3 through a connecting block. The gear 16 meshes with the rack 15 and is mounted on the output shaft of the servo motor 17. The servo motor 17 is mounted on a motor base, which is welded to the rear side plate of the housing 1. The servo motor 17 is controlled by a control system or PLC and controls the lifting height of the lifting cover 3. In this embodiment, the drive mechanism can also use a ball screw pair and a stepper motor.

[0034] The working process of this embodiment is as follows: the crushed and washed salt is conveyed by the feeding shaft of the feeding hopper 1-2 to the material plate 2 inside the box 1. The hot air blower 18 sends hot air into the box 1, and the hot air heats and dries the raw salt. The moisture evaporates into steam. The powdered salt and small granular salt in the raw salt are blown up under the action of the hot air pressure and the negative pressure of the blower. The control system controls the servo motor 17 to drive the lifting cover 3 to rise or fall to a certain position height through the gear 16 and rack 15. This position height corresponds to the grade of salt. When the lifting cover 3 is lifting, the solenoid valve 7 of the first air seal ring 5 and the second air seal ring 10 exhausts. After the lifting cover 3 is positioned, the solenoid valve 7 fills the solenoid valve 7 of the first air seal ring 5 and the second air seal ring 10 with air to seal. The powdered salt and small granular salt of this grade enter the cyclone separator 11 through the lifting pipe 8 and the fixed pipe 9 in sequence. The powdered salt and small granular salt are separated in the cyclone separator 11 and enter the collection device. The dried large granular salt that meets the grade is discharged from the discharge hopper 1-3.

[0035] Example 2

[0036] The structure of the housing 1, lifting cover 3, lifting pipe 8, fixed pipe 9, and cyclone separator 11 in Embodiment 2 is the same as in Embodiment 1. The guiding mechanism in Embodiment 2 consists of two guide rail pairs. The slider 19 of each guide rail pair is mounted on the rear side plate of the lifting cover 3. The guide rail 20 is vertically mounted on the guide rail bracket (not shown in the figure), and the lower end of the guide rail bracket is mounted on the base 1-4. The lifting drive mechanism consists of a servo cylinder 21, an electro-hydraulic servo valve, etc. A first lug 22 is welded to the rear side plate of the lifting cover 3. The first lug 22 is hinged to the piston rod of the servo cylinder 21 via a pin 22-1. The servo cylinder 21 is vertically positioned, and a connecting trunnion 21-1 is welded to the middle of its cylinder body. The connecting trunnion 21-1 is hinged to a second lug 23, which is welded to the housing 1. A displacement sensor is installed on the servo cylinder 21, which is controlled by the electro-hydraulic servo valve. Both the displacement sensor and the electro-hydraulic servo valve are electrically connected to the control system or PLC. In Example 2, the height of the lifting cover 3 is precisely controlled by a servo cylinder 21 and an electro-hydraulic servo valve, thereby precisely controlling the salt grade.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent structural changes made based on the description and drawings of the present invention are included within the scope of the present invention.

Claims

1. An integrated device for drying and sieving salt based on a fluidized bed, comprising a hot air blower and a rectangular housing mounted on a base, characterized in that: The lower part of one side of the box is provided with an air inlet connected to a hot air blower. The top of the box is open. A horizontal material plate is provided in the middle of the box. The two ends of the box above the material plate are respectively provided with a material inlet and a material outlet. The top of the housing is covered by a lifting cover. A vertical partition is fixed inside the lifting cover to divide the lifting cover into two chambers. The top of the lifting cover of each chamber is provided with a vertical lifting pipe that communicates with the chamber. A fixed pipe is fitted outside the lifting pipe. The fixed pipe is connected to the inlet of the cyclone separator. An induced draft fan is installed at the outlet of the cyclone separator. The inner walls of the lower ports of the lifting cover and the fixed pipe are provided with airtight rings. The outer side of the lifting cover is provided with a guide mechanism and a lifting drive mechanism; The guiding mechanism includes two guide rail pairs, with the slider of each guide rail pair fixed to the outer side of the lifting cover, and the guide rails vertically mounted on the guide rail base; The lower port of the lifting hood has four interconnected grooves on its inner walls, and the air seal ring is embedded in the grooves; the lower port of the lifting pipe has an annular groove for embedding the air seal ring; the air seal ring is connected to a sealing pipe equipped with a solenoid valve. The lifting drive mechanism includes a servo cylinder and an electro-hydraulic servo valve. A first lug is fixedly connected to the outside of the lifting cover. The first lug is hinged to the piston rod of the servo cylinder. A connecting trunnion is provided in the middle of the cylinder body of the servo cylinder. The connecting trunnion is connected to a second lug. The second lug is fixedly connected to the housing. The servo cylinder is controlled by the electro-hydraulic servo valve. The displacement sensors of the electro-hydraulic servo valve and the servo cylinder are electrically connected to the control system.

2. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: The guiding mechanism includes guide posts and guide sleeves. The two guide sleeves are respectively fixed to the outer side of the lifting cover. The two vertical guide posts are slidably engaged with the guide sleeves. The lower end of the guide posts is fixed to the base.

3. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: The lifting drive mechanism includes a rack, a gear, and a servo motor. The rack is fixed to the outer side of the lifting cover, and the servo motor is mounted on the gear that meshes with the rack.

4. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: The lifting cover includes a cap and a rectangular cylindrical part, which is fitted onto the outside of the housing.

5. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: The outer wall of the upper port of the housing is provided with a sealing ring with a rectangular cross-section.

6. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: Silicone plates are installed on the inner wall of the lifting cover and on the two sides of the partition.

7. The integrated device for salt drying and sieving and grading based on a fluidized bed according to claim 1, characterized in that: The gas seal and the sealing ring are made of silicone.

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