Spray dryer with scraping mechanism

Abstract

The utility model discloses a spray dryer with a scraping mechanism, which comprises a dryer, the top of the dryer is provided with a top cover, one side of the dryer is provided with a fan, the top of the fan is communicated with a heating box, an electric heating pipe is arranged in the heating box, the top of the heating box is connected with an air pipe through a connector, and the other end of the air pipe is communicated with the dryer. A rotating shaft is rotationally connected to the center of the bottom of the top cover, scraping plates are fixed to the two ends of the rotating shaft through fixing assemblies, and when the abraded scraping plates are replaced, the two pressing blocks are pressed inwards, so that the pressing blocks move and compress springs through moving plates, and when the two pressing blocks get close to each other, the two moving plates and clamping blocks are driven to move and get close to each other; the clamping blocks are separated from the clamping grooves in the surfaces of the scrapers, and the insertion rods on the surfaces of the scrapers are pulled out of the insertion grooves in the surfaces of the stirring rods, so that the scrapers are separated from the stirring rods and are detached and replaced, the scrapers are convenient to detach, and the detaching and installing efficiency of the scrapers is greatly improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of spray dryers, and particularly relates to a spray dryer with a scraping mechanism. Background Technique

[0002] A spray dryer is a drying equipment that processes liquid materials into powdery materials through atomization and heating. It mainly uses different atomizers to spray solutions, emulsions, suspensions or paste-like materials containing moisture into fine droplets in hot air. During the falling process of the droplets, the moisture is evaporated into powdery or granular products, thus completing the two processes of spraying and drying in a single process. When drying liquid materials with a spray dryer, in order to prevent the materials from adhering to the inner wall of the machine body after drying, a scraper is generally set to scrape the inner wall of the machine body to remove the materials adhering to the inner wall of the machine body;

[0003] Currently, the liquid material is sprayed into the dryer, and the sprayed material is heated and dried into powder by hot air. While the stirring rod stirs the material, the scrapers fixed on both sides scrape off the powder adhering to the inner wall of the machine body, so as to clean and mix the powder to avoid waste. However, since the scraper contacts the inner wall of the dryer when rotating, after the scraper frequently contacts the inner wall of the dryer, the scraper is severely worn. The long-term wear makes the distance between the scraper and the inner wall of the dryer farther and farther, so the scraping effect of the magnetic powder on the inner wall of the dryer is poor. Therefore, the scraper needs to be replaced regularly to ensure that the scraper can normally scrape the magnetic powder. However, since the scraper is usually directly fixedly connected to the stirring rod inside the dryer or fixedly connected by bolts, when replacing the scraper, the entire stirring rod needs to be disassembled or multiple groups of bolts need to be disassembled to replace the scraper, which makes it more troublesome to replace the scraper and greatly reduces the replacement efficiency of the scraper. Content of the Utility Model

[0004] The purpose of the utility model is to provide a spray dryer with a scraping mechanism to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A spray dryer with a scraping mechanism, comprising:

[0006] A dryer, a top cover is provided at the top of the dryer, and a blower is provided on one side of the dryer. An electric heating tube is provided in a heating box connected to the top of the blower. The top of the heating box is connected to an air pipe through a connector, and the other end of the air pipe is connected to the dryer. A rotating shaft is rotatably connected to the center of the bottom of the top cover. Two ends of the rotating shaft are fixed with scrapers for scraping the inner wall of the dryer through a fixing component. The two clamping blocks of the fixing component are clamped with the clamping grooves on the surface of the scraper, so that the scraper is clamped and fixed on the surface of the rotating shaft.

[0007] Preferably, the fixing assembly includes pressing blocks and straight rods. There are two groups of straight rods, which are both connected to both ends of the rotating shaft. There are two groups of pressing blocks, which are both slidably connected to one end of the straight rods. One end of the pressing block located inside the straight rod is connected with a moving plate, and a spring is connected between the two moving plates.

[0008] Preferably, one end of the clamping block is connected to the moving plate, and the other end of the clamping block movably penetrates through the straight rod. A guiding rod is provided at the end of the clamping block located outside the straight rod, and the clamping block is slidably sleeved on the surface of the guiding rod.

[0009] Preferably, stirring rods are connected to both sides of the top and bottom of the rotating shaft, and slots are provided inside one end of the stirring rods. Plug rods are fixedly connected to both the top and bottom of the scraping plate, and the plug rods are inserted into the slots in a matching manner.

[0010] Preferably, a sealing box is rotatably sleeved on the surface of the top of the rotating shaft, and a sealing bearing is provided at the rotating part of the rotating shaft and the sealing box. One end of the air pipe is connected to the sealing box, and a plurality of air holes are opened at one end of the rotating shaft located inside the sealing box.

[0011] Preferably, the rotating shaft and the stirring rods are both hollow, and a plurality of spray heads are provided on the surface of the stirring rods.

[0012] Preferably, a motor is provided on the surface of the top cover, and the output shaft of the motor rotatably penetrates through the top cover and is connected to the rotating shaft.

[0013] Preferably, a feed hopper is further provided on the surface of the top cover. An atomizer is connected to the bottom of the feed hopper on the surface of the top cover, and a discharge pipe is connected to the bottom of the dryer.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] (1) By adding liquid materials into the feed hopper, the liquid materials entering the feed hopper are turned into a mist by the atomizer and sprayed into the dryer. At the same time, the fan is started. The fan draws air into the heating box, and the electric heating tubes in the heating box are electrified to generate heat. The air drawn by the fan is heated by the electric heating tubes and then becomes hot air, which enters the sealing box through the connecting pipe and enters the rotating shaft and the stirring rods through the air holes. When the hot air enters the stirring rods, it is sprayed out through the spray heads. Thus, the sprayed hot air is used to heat and dry the misty materials sprayed in the dryer, so that the moisture in the misty materials evaporates to form powder. During the drying process, the stirring rods rotate to drive the scraping plate to rotate. While the scraping plate rotates, it can scrape the powder materials adhering to the inner wall of the dryer, mix them with the materials in the dryer and dry them, thereby greatly reducing the waste of materials.

[0016] (2) When it is necessary to replace the worn scraper, press the two groups of pressing blocks inward, so that the pressing blocks move and compress the spring through the moving plate. When the two groups of pressing blocks approach each other, drive the two groups of moving plates and the clamping blocks to move and approach each other, so that the clamping blocks are disengaged from the clamping slots on the surface of the scraper, and the insertion rods on the surface of the scraper are pulled out from the slots on the surface of the stirring rod, so that the scraper is disengaged from the fixation with the stirring rod, and the scraper is disassembled and replaced, making it more convenient to disassemble the scraper, thus greatly improving the efficiency of scraper disassembly and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a sectional view of the present utility model;

[0019] Figure 3 is a schematic structural diagram of the present utility model after the clamping block is clamped with the clamping slot;

[0020] Figure 4 is a sectional view of the sealing box of the present utility model.

[0021] In the figure: 1, dryer; 2, fan; 3, heating box; 4, electric heating tube; 5, air pipe; 6, scraper; 7, top cover; 8, rotating shaft; 9, clamping block; 10, clamping slot; 11, pressing block; 12, straight rod; 13, moving plate; 14, spring; 15, guiding rod; 16, stirring rod; 17, slot; 18, sealing box; 19, sealing bearing; 20, air hole; 21, spray head; 22, motor; 23, feed hopper; 24, atomizer; 25, discharge pipe; 26, insertion rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0023] The present utility model provides a Figures 1-4 spray drying machine with a scraping mechanism as shown in

[0024] Drying machine 1, a top cover 7 is provided at the top of the drying machine 1, and a blower 2 is provided on one side of the drying machine 1. A heating box 3 is connected to the top of the blower 2, and an electric heating tube 4 is provided in the heating box 3. The top of the heating box 3 is connected to an air pipe 5 through a connector, and the other end of the air pipe 5 is connected to the drying machine 1. A rotating shaft 8 is rotatably connected to the center of the bottom of the top cover 7. Two ends of the rotating shaft 8 are fixed with a scraper 6 for scraping the inner wall of the drying machine 1 through a fixing component. Two clamping blocks 9 of the fixing component are clamped with a clamping groove 10 on the surface of the scraper 6, so that the scraper 6 is clamped and fixed on the surface of the rotating shaft 8.

[0025] The fixing component includes a pressing block 11 and a straight rod 12. There are two groups of the straight rods 12, and both are connected to two ends of the rotating shaft 8. There are two groups of the pressing blocks 11, and both are slidably connected to one end of the straight rod 12. One end of the pressing block 11 located inside the straight rod 12 is connected with a moving plate 13, and a spring 14 is connected between the two moving plates 13.

[0026] One end of the clamping block 9 is connected with the moving plate 13, and the other end of the clamping block 9 movably penetrates through the straight rod 12. A guiding rod 15 is provided at the end of the clamping block 9 located outside the straight rod 12, and the clamping block 9 is slidably sleeved on the surface of the guiding rod 15. By guiding one end of the clamping block 9 through the guiding rod 15, the stability of one end of the clamping block 9 sliding on the surface of the guiding rod 15 can be enhanced.

[0027] Both sides of the top and bottom of the rotating shaft 8 are connected with stirring rods 16, and a slot 17 is provided inside one end of the stirring rod 16. Both the top and bottom of the scraper 6 are fixedly connected with inserting rods 26, and the inserting rods 26 are cooperatively inserted into the slots 17. By inserting the inserting rods 26 into the slots 17, the scraper 6 is initially positioned and installed, facilitating subsequent clamping and fixing.

[0028] A sealing box 18 is rotatably sleeved on the surface of the top of the rotating shaft 8, and a sealing bearing 19 is provided at the rotating part of the rotating shaft 8 and the sealing box 18. One end of the air pipe 5 is connected to the sealing box 18. A plurality of air holes 20 are opened at one end of the rotating shaft 8 located inside the sealing box 18. The hot air entering the sealing box 18 through the air pipe 5 can enter the hollow rotating shaft 8 and stirring rods 16 through the air holes 20.

[0029] Both the rotating shaft 8 and the stirring rods 16 are hollow, and a plurality of nozzles 21 are provided on the surface of the stirring rods 16. The hot air can flow in the hollow rotating shaft 8 and stirring rods 16, and the hot air is sprayed out through the nozzles 21 to dry the material.

[0030] A motor 22 is provided on the surface of the top cover 7, and the output shaft of the motor 22 rotatably penetrates through the top cover 7 and is connected to the rotating shaft 8. After starting the motor 22, the rotating shaft 8 can be driven to rotate by the output shaft of the motor 22.

[0031] The surface of the top cover 7 is also provided with a feed hopper 23. A nebulizer 24 is connected to the bottom of the feed hopper 23 on the surface of the top cover 7. A discharge pipe 25 is connected to the bottom of the dryer 1. After the material is dried, the material can be discharged through the discharge pipe 25.

[0032] For this spray dryer with a scraping mechanism, the liquid material is added into the feed hopper 23. The liquid material entering the feed hopper 23 is turned into a mist by the nebulizer 24 and sprayed into the dryer 1. At the same time, the fan 2 is started. The fan 2 draws air into the heating box 3. The electric heating tubes 4 in the heating box 3 are energized to generate heat. The air drawn by the fan 2 is heated by the electric heating tubes 4 and becomes hot air, which enters the sealing box 18 through the connecting pipe and enters the rotating shaft 8 and the stirring rod 16 through the air holes 20. When the hot air enters the stirring rod 16, it is sprayed out through the nozzles 21. Thus, the sprayed hot air is used to heat and dry the mist-like material sprayed in the dryer 1, causing the water in the mist-like material to evaporate and form powder. While drying, the motor 22 drives the rotating shaft 8, the stirring rod 16, and the scraper 6 to rotate. When the scraper 6 rotates, it can scrape the powder material adhering to the inner wall of the dryer 1, making it mix with the material in the dryer 1 and be dried. Thus, the waste of materials is greatly reduced. Moreover, the connection between the rotating shaft 8 and the sealing box 18 is connected through a sealing bearing 19, which can reduce friction and wear through the sealing bearing 19 when the rotating shaft 8 rotates.

[0033] When it is necessary to replace the worn scraper 6, the air pipe 5 connected to the top of the heating box 3 through the connector is disassembled, and the top cover 7 is removed from the top of the dryer 1. Thus, the rotating shaft 8, the stirring rod 16, and the scraper 6 are taken out of the dryer 1 as a whole. Then, the two pressing blocks 11 are pressed inward, causing the pressing blocks 11 to move and compress the spring 14 through the moving plate 13. When the two pressing blocks 11 approach each other, they drive the two moving plates 13 and the clamping blocks 9 to move and approach each other, so that the clamping blocks 9 are disengaged from the clamping slots 10 on the surface of the scraper 6, and the insertion rods 26 on the surface of the scraper 6 are pulled out of the insertion slots 17 on the surface of the stirring rod 16. Thus, the scraper 6 is disengaged from the fixation with the stirring rod 16, and the scraper 6 is disassembled and replaced, making the disassembly of the scraper 6 relatively convenient. When installing the scraper 6, the insertion rods 26 on the surface of the scraper 6 are inserted into the insertion slots 17, and the above operation of pressing the two pressing blocks 11 is repeated. When the clamping blocks 9 are inserted into the clamping slots 10, the two pressing blocks 11 are released to make the spring 14 rebound, driving the clamping blocks 9 to be clamped with the clamping slots 10, so that the scraper 6 is fixed to the stirring rod 16, and the installation is relatively convenient, greatly improving the replacement efficiency of the scraper 6.

[0034] Finally, it should be noted that the above are only preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A spray dryer with a scraping mechanism, characterized in that, Including: A dryer (1), a top cover (7) is provided at the top of the dryer (1), and a blower (2) is provided on one side of the dryer (1). A heating box (3) is connected to the top of the blower (2), and electric heating tubes (4) are provided in the heating box (3). The top of the heating box (3) is connected to an air pipe (5) through a connector, and the other end of the air pipe (5) is connected to the dryer (1). A rotating shaft (8) is rotatably connected to the center of the bottom of the top cover (7). Scraper plates (6) for scraping the inner wall of the dryer (1) are fixed at both ends of the rotating shaft (8) through fixing components. The two clamping blocks (9) of the fixing components are clamped with the clamping grooves (10) on the surface of the scraper plate (6) so that the scraper plate (6) is clamped and fixed on the surface of the rotating shaft (8).

2. The spray dryer with a scraping mechanism according to claim 1, characterized in that: The fixing component includes pressing blocks (11) and straight rods (12). There are two groups of straight rods (12), and both are connected to both ends of the rotating shaft (8). There are two groups of pressing blocks (11), and both are slidably connected to one end of the straight rod (12). A moving plate (13) is connected to one end of the pressing block (11) located inside the straight rod (12), and a spring (14) is connected between the two moving plates (13).

3. The spray dryer with a scraping mechanism according to claim 2, characterized in that: One end of the clamping block (9) is connected to the moving plate (13), and the other end of the clamping block (9) movably penetrates through the straight rod (12). A guide rod (15) is provided at the end of the clamping block (9) located outside the straight rod (12), and the clamping block (9) is slidably sleeved on the surface of the guide rod (15).

4. A spray dryer with a scraping mechanism according to claim 1, characterized in that: Stirring rods (16) are connected to both sides of the top and bottom of the rotating shaft (8), and a slot (17) is provided inside one end of the stirring rod (16). Plug rods (26) are fixedly connected to both the top and bottom of the scraper plate (6), and the plug rods (26) are inserted in cooperation with the slots (17).

5. The spray dryer with a scraping mechanism according to claim 1, characterized in that: A sealing box (18) is rotatably sleeved on the surface of the top of the rotating shaft (8), and a sealing bearing (19) is provided at the rotating part of the rotating shaft (8) and the sealing box (18). One end of the air pipe (5) is connected to the sealing box (18), and a plurality of air holes (20) are opened at one end of the rotating shaft (8) located inside the sealing box (18).

6. The spray dryer with a scraping mechanism according to claim 4, characterized in that: Both the rotating shaft (8) and the stirring rod (16) are hollow, and a plurality of spray heads (21) are provided on the surface of the stirring rod (16).

7. A spray dryer with a scraping mechanism according to claim 1, characterized in that: A motor (22) is provided on the surface of the top cover (7), and the output shaft of the motor (22) rotatably penetrates through the top cover (7) and is connected to the rotating shaft (8).

8. A spray dryer with a scraping mechanism according to claim 1, characterized in that: A feed hopper (23) is further provided on the surface of the top cover (7). An atomizer (24) is connected to the bottom of the feed hopper (23) on the surface of the top cover (7). A discharge pipe (25) is connected to the bottom of the dryer (1).

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