Preheating spray drying device

Abstract

The utility model discloses a preheating spray drying device, which belongs to the technical field of spray drying and comprises a tank body, a first annular pipe is arranged at the upper end of an inner cavity of the tank body, a liquid inlet pipe is fixedly communicated with the top of the first annular pipe, a plurality of atomizers are arranged around the bottom of the first annular pipe, and a hollow first baffle is arranged in the tank body. The upper edge of the first baffle is fixedly connected with the inner wall of the tank body, a heat conduction plate and a heating layer are arranged in the first baffle, a discharging port is formed in the bottom of the tank body, a motor is arranged on the top of the tank body, an output shaft of the motor is connected with a rotating shaft, and the lower end of the rotating shaft is rotationally connected with an air inlet pipeline. A stirring rod is arranged on the rotating shaft, cavities are formed in the rotating shaft and the stirring rod, and a through hole is formed in the stirring rod. The first baffle is arranged to pre-dry mist liquid beads, the funnel shape can prolong the pre-drying time, the moisture of the mist liquid beads is reduced, the mist liquid beads are prevented from adhering to the tank body, and the material utilization rate is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of spray drying, in particular to a preheating spray drying device. Background Art

[0002] The spray drying device is an industrial equipment that can complete drying and granulation at the same time. It is suitable for generating powdered and granular solid products from solutions, emulsions, suspensions and paste-like liquid materials. The spray drying device can spray the material into extremely fine mist liquid droplets. When in contact with hot air, the water vaporizes rapidly and can be dried into a finished product. Since part of the material will adhere to the tank wall when it is sprayed out, as the number of drying times increases, the material on the tank wall continues to accumulate, damaging the equipment and wasting the material. The existing technology reduces material waste by adding a scraper to clean the material on the tank wall, but the scraper will damage the tank body and reduce the service life. In addition, the existing device has the problem of insufficient contact between the mist liquid droplets and the hot air, resulting in a decrease in drying effect and quality.

[0003] In view of the above problems existing in the prior art, the present invention designs and manufactures a preheating spray drying device in combination with many years of design and use experience in the relevant field to overcome the above defects. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a preheating spray drying device, which pre-dries the mist liquid beads to prevent the material from adhering to the tank wall, without damaging the tank body, avoiding material waste, improving the drying degree, and thus improving the drying effect.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a preheating spray drying device, comprising a tank body, a first annular tube is provided at the upper end of the inner cavity of the tank body, a liquid inlet pipe is vertically fixedly connected to the top of the first annular tube, a plurality of atomizers are arranged around the bottom of the first annular tube, the liquid inlet pipe is away from the end of the first annular tube, passes through the top of the tank body and extends to the outside of the tank body, and a discharge port is provided at the bottom of the tank body;

[0006] A hollow first baffle is provided in the tank body, the first baffle is funnel-shaped, the first baffle is located below the liquid inlet pipe, the lower end of the atomizer is lower than the top of the first baffle, the upper edge of the first baffle is fixedly connected to the inner wall of the tank body, and a heat conducting plate and a heating layer are sequentially provided in the hollow structure of the first baffle from top to bottom;

[0007] A motor is provided on the top of the tank body, the output shaft of the motor extends into the tank body and is vertically fixedly connected to a rotating shaft, the lower end of the rotating shaft is rotatably connected to an air inlet duct, the air inlet duct extends out of the tank body away from the rotating shaft end and is connected to a hot air blower;

[0008] A plurality of stirring rods are symmetrically arranged on the rotating shaft, and the rotating shaft and the stirring rods are in a vertical state. The rotating shaft and the stirring rods are both provided with cavities, and the cavities of the rotating shaft are respectively connected with the cavities of the stirring rods and the air inlet duct, and the stirring rods are provided with a plurality of through holes connected with the cavities of the stirring rods.

[0009] Preferably, the liquid inlet pipe is connected to a liquid inlet pump away from the first annular pipe end, and the liquid inlet pump is connected to a liquid storage chamber away from the liquid inlet pipe end.

[0010] Preferably, a plurality of cross bars are horizontally provided on the first annular tube, both ends of the cross bars are respectively fixedly connected to the inner circular edge of the first annular tube, the top of the cross bar is fixedly connected to a first fixing rod, and one end of the first fixing rod away from the cross bar is connected to the upper end of the inner wall of the tank body.

[0011] Preferably, the hot air blower is fixedly connected with an air filter away from the end of the air inlet duct.

[0012] Preferably, an inclined plate is provided at the bottom of the tank body, the outer edge of the inclined plate abuts against the inner wall of the tank body, a circular hole is provided on the inclined plate, and the lower end of the rotating shaft passes through the circular hole and is rotatably connected to the inclined plate.

[0013] Preferably, an air vent is provided at the top of the tank body, a filter is provided on the air vent, a recovery pipe is connected above the filter, a recovery box is connected to one end of the recovery pipe away from the filter, and the recovery box is fixed on the outside of the tank body.

[0014] Preferably, the recycling box is provided with a box door, a dehumidification device is vertically connected to the recycling box on one side away from the tank body, a blower is provided on the other side of the recycling box, a dehumidification device is filled with a dehumidifier, a support frame is provided in the recycling box, and the blower is fixed to the recycling box through the support frame;

[0015] The recovery box is provided with an air outlet pipe away from the dehumidification device, and the air outlet pipe connects the tank body and the recovery box.

[0016] Preferably, a second annular baffle is provided in the tank body, the second baffle is arranged horizontally, the outer circular edge of the second baffle is fixedly connected to the inner wall of the tank body, and the inner circular edge of the second baffle is fixedly connected to the lower end of the first baffle;

[0017] A plurality of connecting rods are vertically arranged on the second baffle plate, the lower ends of the connecting rods are connected to a second annular tube, the second annular tube is communicated with the air outlet pipe, and a plurality of high-pressure nozzles are arranged around the lower end of the second annular tube.

[0018] Preferably, the recovery pipe and the recovery box are both provided with a heat-insulating layer.

[0019] Preferably, a plurality of heating wires are embedded in the heating layer, and a temperature insulation layer is provided below the heating layer, and the temperature insulation layer is located in the hollow structure of the first baffle.

[0020] Preferably, a plurality of supporting legs are provided around the bottom of the tank body.

[0021] The utility model is beneficial in that:

[0022] 1. The utility model is provided with a funnel-shaped first baffle to pre-dry the mist liquid beads, reduce the moisture of the mist liquid beads, thereby reducing the situation where the mist liquid beads adhere to the tank body and avoid the scraper strip from damaging the tank body. The funnel shape can extend the pre-drying time of the mist liquid beads, and the mist liquid beads are in a heated state while sliding down along the first baffle.

[0023] 2. The utility model generates hot air through a hot air blower, and the hot air is discharged through a through hole connected to the cavity of the stirring rod to dry the mist liquid beads. The rotation of the stirring rod drives the hot air to flow, so that the hot air can fully contact the mist liquid beads, thereby improving the drying effect.

[0024] 3. The utility model passes the hot air escaping from the filter into the recovery box, removes moisture from the hot air and then passes it into the tank again, thereby improving the heat utilization rate, blowing off the mist droplets on the rotating shaft and the stirring rod, and improving the material utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a cross-sectional view of a preheating spray drying device.

[0026] Figure 2 The figure is a top view of a first annular tube in a preheating spray drying device.

[0027] Figure 3 The present invention is a cross-sectional view of a first baffle in a preheating spray drying device.

[0028] In the figure: 1-tank body, 2-liquid inlet pipe, 3-liquid inlet pump, 4-liquid storage chamber, 5-first annular tube, 6-atomizer, 7-first baffle, 8-second baffle, 9-motor, 10-connecting rod, 11-second annular tube, 12-rotating shaft, 13-stirring rod, 14-through hole, 15-filter screen, 16-recovery pipeline, 17-recovery box, 18-dehumidification device, 19-blower, 20-support frame, 21-air outlet pipe, 22-high pressure nozzle, 23-inclined plate, 24-discharge port, 25-support foot, 26-hot air blower, 27-air filter, 28-first fixed rod, 29-cross bar, 30-heat conduction plate, 31-heating layer, 32-insulating layer, 33-air inlet duct. DETAILED DESCRIPTION

[0029] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings.

[0030] like Figure 1-3As shown, a preheating spray drying device includes a tank body 1, a first annular tube 5 is provided at the upper end of the inner cavity of the tank body 1, a liquid inlet pipe 2 is vertically fixedly connected to the top of the first annular tube 5, a plurality of atomizers 6 are arranged around the bottom of the first annular tube 5, the end of the liquid inlet pipe 2 away from the first annular tube 5 passes through the top of the tank body 1 and extends to the outside of the tank body 1, a discharge port 24 is arranged at the bottom of the tank body 1, a hollow first baffle 7 is arranged in the tank body 1, the first baffle 7 is funnel-shaped, the first baffle 7 is located below the liquid inlet pipe 2, the lower end of the atomizer 6 is lower than the top of the first baffle 7, the upper edge of the first baffle 7 is fixedly connected to the inner wall of the tank body 1, and the first baffle 7 is arranged in the hollow structure from top to bottom in sequence A heat conducting plate 30 and a heating layer 31 are provided, a motor 9 is provided on the top of the tank body 1, an output shaft of the motor 9 extends into the tank body 1 and is vertically fixedly connected to a rotating shaft 12, an air inlet duct 33 is rotatably connected to the lower end of the rotating shaft 12, the air inlet duct 33 extends out of the tank body 1 away from the end of the rotating shaft 12 and is connected to a hot air blower 26, a plurality of stirring rods 13 are symmetrically provided on the rotating shaft 12, the rotating shaft 12 and the stirring rod 13 are in a vertical state, the rotating shaft 12 and the stirring rod 13 are both provided with cavities, the cavity of the rotating shaft 12 is respectively connected with the cavity of the stirring rod 13 and the air inlet duct 33, and the stirring rod 13 is provided with a plurality of through holes 14 connected with the cavity of the stirring rod 13.

[0031] Specifically, the first baffle 7 is heated by arranging the heating layer 31 and the heat conducting plate 30, and the mist liquid beads sprayed from the atomizer 6 fall on the first baffle 7. The first baffle 7 can pre-dry the mist liquid beads to reduce the viscosity of the mist liquid beads. The height of the atomizer 6 is lower than the first baffle 7, so that the mist liquid beads sprayed from the atomizer 6 fall on the first baffle 7, thereby preventing the mist liquid beads from adhering to the inner wall of the tank body 1 and improving the material utilization rate. The first baffle 7 is set to be funnel-shaped to extend the time for the mist liquid beads to stay on the first baffle 7. The retention time can improve the pre-drying effect. The hot air blower 26 heats the air to obtain hot air. The hot air enters the cavity of the rotating shaft 12 and the cavity of the stirring rod 13 from the air inlet duct 33, and then escapes from the through hole 14 into the interior of the tank body 1. The motor 9 drives the rotating shaft 12 to rotate, drives the stirring rod 13 to rotate, and stirs the escaping hot air and the mist liquid droplets. The hot air can be evenly diffused into the tank body 1, and the mist liquid droplets falling from the first baffle 7 are fully in contact with the hot air, are evenly heated, and have a good drying effect.

[0032] The end of the liquid inlet pipe 2 away from the first annular pipe 5 is connected to a liquid inlet pump 3, and the end of the liquid inlet pump 3 away from the liquid inlet pipe 2 is connected to a liquid storage chamber 4. A plurality of cross bars 29 are horizontally arranged on the first annular pipe 5, and the two ends of the cross bar 29 are respectively fixedly connected to the inner circle edge of the first annular pipe 5, and the top of the cross bar 29 is fixedly connected to a first fixed rod 28, and one end of the first fixed rod 28 away from the cross bar 29 is connected to the upper end of the inner wall of the tank body 1, and the end of the hot air blower 26 away from the air inlet duct 33 is fixedly connected to an air filter 27, and an inclined plate 23 is arranged at the bottom of the tank body 1, and the outer edge of the inclined plate 23 abuts against the inner wall of the tank body 1, and a circular hole is arranged on the inclined plate 23, and the lower end of the rotating shaft 12 passes through the circular hole and is rotatably connected to the inclined plate 23, and the air inlet duct 33 is located below the inclined plate 23, and an air vent is arranged at the top of the tank body 1, and a filter screen 15 is arranged on the air vent, and a recovery pipe 16 is connected above the filter screen 15, and the recovery pipe 16 is connected to a recovery box 17 at one end away from the filter screen 15. The recovery box 17 is fixed to the outside of the tank body 1, and a box door is provided on the recovery box 17. A dehumidification device 18 is vertically connected to the recovery box 17 away from the tank body 1. The dehumidification device 18 is filled with a dehumidifier. A blower 19 is provided on the other side of the recovery box 17. A support frame 20 is provided in the fixed box 17, and the blower 19 is fixed to the recovery box 17 through the support frame 20. An air outlet pipe 21 is provided at the recovery box 17 away from the dehumidification device 18, and the air outlet pipe 21 connects the tank body 1 and the recovery box 17. A circular second baffle 8 is provided in the tank body 1. The second baffle 8 is horizontally arranged, and the outer circular edge of the second baffle 8 is fixedly connected to the inner wall of the tank body 1, and the inner circular edge of the second baffle 8 is fixedly connected to the lower end of the first baffle 7. A plurality of connecting rods 10 are vertically provided on the second baffle 8. The lower end of the connecting rod 10 is connected to a second annular tube 11, and the second annular tube 11 is connected to the air outlet pipe 21, and a plurality of high-pressure nozzles 22 are arranged around the lower end of the second annular tube 11. The recovery pipe 16 and the recovery box 17 are both provided with an insulation layer. A plurality of heating wires are embedded in the heating layer 31 . A thermal insulation layer 32 is provided below the heating layer 31 . The thermal insulation layer 32 is located in the hollow structure of the first baffle 7 . Support legs 25 are provided around the bottom of the tank body 1 .

[0033] The utility model air filter filters air, and the hot air in the tank body 1 is fully in contact with the mist liquid droplets during the rising process, and the mist liquid droplets are dried and taken away with moisture. The hot air with moisture enters the recovery box 17 from the filter screen 15. Since the hot air still has a certain temperature, but contains moisture, the moisture carried in the hot air is removed by the dehumidification device 18, and the dried hot air is brought into the air outlet pipe 21 by the blower 19. The hot air enters the second annular pipe 11 from the air outlet pipe 21, and then is ejected from the high-pressure nozzle 22. The ejected hot air continues to dry the mist liquid droplets, thereby improving the heat utilization rate, and the airflow when the hot air is ejected is used to blow off the mist liquid droplets on the rotating shaft 12 and the stirring rod 13, thereby improving the material utilization rate. The dehumidification device 18 can be replaced regularly.

[0034] Specific operation process

[0035] Start the motor 9, the hot air blower 26 and the air filter 27. The motor 9 drives the rotating shaft 12 to rotate, drives the stirring rod 13 to rotate, and the air filter 27 filters the air. The filtered air enters the hot air blower 26 for heating. The hot air enters the cavity of the rotating shaft 12 and the cavity of the stirring rod 13 from the air inlet duct 33. The hot air escapes from the through hole 14 of the stirring rod 13 and enters the tank body 1, and is evenly distributed in the tank body 1. The liquid inlet pump 3 and the blower 19 are turned on. The material is pumped from the liquid storage chamber 4 into the first annular tube 5 by the liquid inlet pump 3. The material is sprayed from the atomizer 6 on the first annular tube 5 to form mist liquid beads. The mist liquid beads slide down along the first baffle 7. At the same time, the heating wire is heated, and the heat conducting plate 30 is The heat of the heating wire is transferred to the first baffle 7, and the mist liquid beads evaporate part of their moisture under the heating wire. After the mist liquid beads fall from the first baffle 7, they are fully in contact with the hot air. The hot air thoroughly dries the mist liquid beads and takes away the moisture. The hot air carries the moisture up from the filter screen 15 through the recovery pipe 16 and enters the recovery box 17. The dehumidifier 18 absorbs the moisture. Under the action of the blower 19, the dried hot air enters the second annular tube 11 from the air outlet pipe 21 and is sprayed out from the high-pressure nozzle 22 on the second annular tube 11. The residual heat of the hot air is used to dry the mist liquid beads, and at the same time, the mist liquid beads on the rotating shaft 12 and the stirring rod 13 are blown off. The dried material is discharged from the discharge port 24, and the material drying is completed.

[0036] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A preheating spray drying device, characterized in that: The invention comprises a tank body (1), wherein a first annular tube (5) is provided at the upper end of the inner cavity of the tank body (1), a liquid inlet tube (2) is vertically connected to the top of the first annular tube (5), a plurality of atomizers (6) are provided around the bottom of the first annular tube (5), the liquid inlet tube (2) extends through the top of the tank body (1) away from the end of the first annular tube (5) to the outside of the tank body (1), and a discharge port (24) is provided at the bottom of the tank body (1); A hollow first baffle (7) is provided in the tank body (1), the first baffle (7) is funnel-shaped, the first baffle (7) is located below the liquid inlet pipe (2), the lower end of the atomizer (6) is lower than the top of the first baffle (7), the upper edge of the first baffle (7) is fixedly connected to the inner wall of the tank body (1), and a heat conducting plate (30) and a heating layer (31) are sequentially provided in the hollow structure of the first baffle (7) from top to bottom; A motor (9) is provided on the top of the tank body (1), an output shaft of the motor (9) extends into the tank body (1) and is vertically fixedly connected to a rotating shaft (12), a lower end of the rotating shaft (12) is rotatably connected to an air inlet duct (33), an end of the air inlet duct (33) away from the rotating shaft (12) extends out of the tank body (1) and is connected to a hot air blower (26); A plurality of stirring rods (13) are arranged on the rotating shaft (12), the rotating shaft (12) and the stirring rods (13) are in a vertical state, the rotating shaft (12) and the stirring rods (13) are both provided with cavities, the cavities of the rotating shaft (12) are respectively connected with the cavities of the stirring rods (13) and the air inlet duct (33), and the stirring rods (13) are provided with a plurality of through holes (14) connected with the cavities of the stirring rods (13).

2. A preheating spray drying device according to claim 1, characterized in that: The end of the liquid inlet pipe (2) away from the first annular pipe (5) is connected to a liquid inlet pump (3), and the end of the liquid inlet pump (3) away from the liquid inlet pipe (2) is connected to a liquid storage chamber (4).

3. A preheating spray drying device according to claim 1, characterized in that: A plurality of cross bars (29) are horizontally arranged on the first annular tube (5), the two ends of the cross bars (29) are respectively fixedly connected to the inner circular edge of the first annular tube (5), the top of the cross bars (29) is fixedly connected to a first fixing rod (28), and one end of the first fixing rod (28) away from the cross bars (29) is connected to the upper end of the inner wall of the tank body (1).

4. A preheating spray drying device according to claim 1, characterized in that: The end of the hot air blower (26) away from the air inlet duct (33) is fixedly connected to an air filter (27).

5. A preheating spray drying device according to claim 1, characterized in that: The bottom of the tank body (1) is provided with an inclined plate (23), the outer edge of the inclined plate (23) abuts against the inner wall of the tank body (1), the inclined plate (23) is provided with a circular hole, and the lower end of the rotating shaft (12) passes through the circular hole and is rotatably connected to the inclined plate (23).

6. A preheating spray drying device according to claim 1, characterized in that: The top of the tank body (1) is provided with an air vent, a filter screen (15) is provided on the air vent, a recovery pipe (16) is connected above the filter screen (15), an end of the recovery pipe (16) away from the filter screen (15) is connected to a recovery box (17), and the recovery box (17) is fixed on the outside of the tank body (1).

7. A preheating spray drying device according to claim 6, characterized in that: The recovery box (17) is provided with a box door, a dehumidification device (18) is vertically connected to the recovery box (17) on the side away from the tank body (1), a blower (19) is provided on the other side of the recovery box (17), a dehumidification agent is contained in the dehumidification device (18), a support frame (20) is provided in the recovery box (17), and the blower (19) is fixed to the recovery box (17) through the support frame (20); The recovery box (17) is provided with an air outlet pipe (21) at a position far away from the dehumidification device (18), and the air outlet pipe (21) connects the tank body (1) and the recovery box (17).

8. A preheating spray drying device according to claim 7, characterized in that: A second annular baffle (8) is provided inside the tank body (1), the second baffle (8) is arranged horizontally, the outer circular edge of the second baffle (8) is fixedly connected to the inner wall of the tank body (1), and the inner circular edge of the second baffle (8) is fixedly connected to the lower end of the first baffle (7); A plurality of connecting rods (10) are vertically arranged on the second baffle (8); the lower ends of the connecting rods (10) are connected to a second annular tube (11); the second annular tube (11) is in communication with an air outlet pipe (21); and a plurality of high-pressure nozzles (22) are arranged around the lower end of the second annular tube (11).

9. A preheating spray drying device according to claim 6, characterized in that: The recovery pipe (16) and the recovery box (17) are both provided with a heat-insulating layer.

10. A preheating spray drying device according to claim 1, characterized in that: A plurality of heating wires are embedded in the heating layer (31), a temperature insulation layer (32) is provided below the heating layer (31), and the temperature insulation layer (32) is located in the hollow structure of the first baffle (7).

Images