A device for drying mandelic acid

Abstract

The utility model relates to the technical field of mandelic acid production, concretely to a mandelic acid production drying device, including drying jar and injection material pipe, the hot -blast pipe is installed to the lower part of drying jar and passes through, and drying jar top end intercommunication installation has the exhaust pipe, the other end intercommunication installation has the cyclone separator of exhaust pipe, drying jar inner wall interval fixed has two groups of support plate, rotatably installed between two groups of support plate and has support shaft, and the lower part of support shaft is fixed with a plurality of groups of spoiler along its circumference, and a plurality of gas holes that allow hot air current to pass through are arranged on the spoiler, the top of support shaft is provided with the distributor, the utility model drives the distributor and spoiler to rotate, when the distributor rotates, can scatter the mandelic acid crystalline body powder that falls on it to the four around, when a plurality of spoilers rotate simultaneously, the hot air current that will be sprayed upwards from the hot -blast pipe is scattered to the surrounding dispersion, in this way, can make the powder and hot air current contact fully, realize to mandelic acid crystalline body powder efficient and sufficient drying.

Description

Technical Field

[0001] This utility model relates to the field of mandelic acid production technology, specifically to a drying device for mandelic acid production. Background Technology

[0002] Mandelic acid, also known as bitter mandelic acid, appears as white orthorhombic flaky crystals on the surface. Commonly used methods include the benzaldehyde phase transfer method, the benzaldehyde phase transfer method, and the benzene-glyoxylic acid method. The benzene-glyoxylic acid method requires precipitation, concentration of the filtrate, filtration of particulate matter, washing of the crystals with water, and finally drying to obtain the product.

[0003] Patent application number 202320363062.3 discloses a drying device for the production of mandelic acid. By providing a second rotating rod, a second fixed column, a first fixed column, and a first rotating rod, the device increases the swinging effect of the second limiting plate in the middle of the drying process, thereby increasing the effect of raising particles on the surface of the ventilation plate, increasing the full contact between the particles and the air, and thus increasing the drying effect of the particles. By providing a limiting groove and a fan, the drying effect of the particles is further enhanced.

[0004] However, the drying devices described in the aforementioned literature still require the powder to be concentrated on the surface of the ventilation plate, resulting in limited drying effect; moreover, it is still necessary to fill and empty the powder on the ventilation plate before and after each drying cycle, making continuous drying of the powder impossible. Based on this, a drying device for mandelic acid production is proposed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a mandelic acid production drying device. When the material distributor rotates, it can disperse the mandelic acid crystalline powder falling on it to the surroundings. When multiple baffles rotate simultaneously, they can disperse the hot airflow sprayed upward from the hot air pipe to the surroundings. In this way, the powder and the hot airflow can be fully contacted, achieving efficient and thorough drying of the mandelic acid crystalline powder.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a drying device for mandelic acid production, comprising a drying tank, an injection pipe installed through the upper part of the drying tank, a hot air pipe installed through the lower part of the drying tank to provide upward hot airflow, and an exhaust pipe connected to the top of the drying tank, the other end of the exhaust pipe connected to a cyclone separator. The inner wall of the drying tank is fixed with two sets of support plates at intervals. A support shaft is rotatably installed between the two sets of support plates. A servo motor that drives the support shaft to rotate is installed at the bottom of the lower support plate. Several sets of baffles are fixed along the circumference of the lower part of the support shaft. Multiple air holes that allow hot air to pass through are opened on the baffles. The top of the support shaft is equipped with a cloth feeder, which can scatter the mandelic acid crystals that fall on its top to the surroundings as the cloth feeder rotates.

[0007] Preferably, the fabric feeder includes a fabric feed disc fixed to the top of the support shaft, with a number of component baffles fixed at intervals along its circumference at the top of the fabric feed disc, and multiple fabric feed holes that allow mandelic acid crystals to pass through are opened at positions between adjacent baffles.

[0008] Preferably, the fabric feeder includes a conical hopper fixed to the top of the support shaft, and the conical hopper has multiple drainage holes arranged from the inside to the outside.

[0009] Preferably, an annular enclosure is fixed to the top of the upper support plate.

[0010] Preferably, the material distributor is located directly below the outlet of the injection pipe.

[0011] Preferably, the spoiler is tilted upwards at an angle of 20-40°.

[0012] Preferably, the hot air duct is equipped with a heater that rapidly increases the gas temperature.

[0013] This utility model provides a drying device for mandelic acid production, which has the following advantages compared with the prior art: 1. This utility model uses a servo motor to drive the support shaft to rotate, thereby driving the material distributor and the baffle to rotate. When the material distributor rotates, the mandelic acid crystal powder falling on it can be scattered in all directions by the centrifugal force. When multiple baffles rotate at the same time, they will disperse the hot air jet from the hot air pipe to the surrounding area. In this way, the powder and the hot air jet can be fully contacted, achieving efficient and thorough drying of the mandelic acid crystal powder.

[0014] 2. This utility model is equipped with a barrier. When the powder is thrown outward under the action of centrifugal force, it will be obstructed by the inner wall of the barrier, which can effectively prevent the powder from being thrown onto the inner wall of the drying tank, so that all the powder can be close to the hot airflow when it falls. Attached Figure Description

[0015] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 This is a cross-sectional view of the drying device structure in Embodiment 1 of this utility model; Figure 2 This is a schematic diagram of the fabric feeder structure in Embodiment 1 of this utility model; Figure 3This is a schematic diagram of the overall structure in Embodiment 1 of this utility model; Figure 4 This is a cross-sectional view of the drying device structure in Embodiment 2 of this utility model; Figure 5 This is a schematic diagram of the fabric feeder structure in Embodiment 2 of this utility model.

[0016] In the diagram: 1-Drying tank, 2-Hot air pipe, 3-Heater, 4-Injection pipe, 5-Support plate, 6-Servo motor, 7-Baffle plate, 8-Air hole, 9-Support shaft, 10-Enclosure, 11-Exhaust pipe, 12-Cyclone separator, 131-Distribution tray, 132-Divider strip, 133-Distribution hole, 141-Conical hopper, 142-Leakage hole. Detailed Implementation

[0017] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0018] Example 1 Traditional drying equipment still relies on a stacking drying method, resulting in relatively poor drying efficiency. To improve the drying effect of mandelic acid crystals and achieve continuous drying, this embodiment provides a mandelic acid production drying apparatus, such as... Figures 1-3 As shown, the device includes a drying tank 1. A feeding pipe 4 is installed through the upper part of the drying tank 1, through which undried mandelic acid crystal powder can be injected into the drying tank 1. A hot air pipe 2 is installed through the lower part of the drying tank 1. A heater 3 is installed on the hot air pipe 2 to rapidly raise the gas temperature and provide an upward hot airflow. An exhaust pipe 11 is connected to the top of the drying tank 1, and a cyclone separator 12 is connected to the other end of the exhaust pipe 11.

[0019] During use, material is injected through the injection pipe 4, and the mandelic acid crystal powder falls downwards under the action of gravity. At the same time, hot air is introduced into the drying tank 1 through the hot air pipe 2. The hot air moves upward and comes into countercurrent contact with the powder falling downwards, thus realizing the continuous drying of the powder.

[0020] Because the upward hot airflow and the downward powder cannot diffuse in all directions—that is, the concentrated accumulation of powder and the limited coverage of the hot airflow—they cannot make sufficient contact. The following solution is provided: Two sets of support plates 5 are fixedly spaced on the inner wall of the drying tank 1. The two sets of support plates 5 are distributed on the upper and lower sides of the inner wall of the drying tank 1. A support shaft 9 is rotatably installed between the two sets of support plates 5. A servo motor 6 that drives the support shaft 9 to rotate is installed at the bottom of the lower support plate 5. Several sets of baffles 7 are fixed along the circumference of the lower part of the support shaft 9. The baffles 7 are inclined upward at an angle of 20-40°. Multiple air holes 8 are opened on the baffles 7 to allow hot air to pass through. The air holes 8 are strip-shaped holes. The arrangement of the air holes 8 allows the hot air to diffuse upward and outward along the baffles 7, and also allows the hot air to pass through multiple air holes 8 in sequence, so that the hot air diffuses upward evenly. A distributor is set at the top of the support shaft 9. As the distributor rotates, the mandelic acid crystals falling on its top can be scattered in all directions.

[0021] In use, the servo motor 6 is started, which drives the support shaft 9 to rotate, thereby driving the material distributor and the baffle 7 to rotate. When the material distributor rotates, the mandelic acid crystal powder falling on it can be scattered in all directions by the centrifugal force. When multiple baffles 7 rotate at the same time, the hot air jet from the hot air pipe 2 is dispersed and dispersed in all directions. In this way, the powder and the hot air jet can be fully contacted, achieving efficient and thorough drying of the mandelic acid crystal powder.

[0022] Specifically, the feeder includes a feed disc 131 fixed to the top of the support shaft 9. The feed disc 131 is located directly below the outlet of the injection pipe 4. Several component baffles 132 are fixed at intervals along the circumference of the top of the feed disc 131. The feed disc 131 has multiple feed holes 133 that allow mandelic acid crystals to pass through at positions between adjacent baffles 132.

[0023] When in use, when the cloth disc 131 rotates, the mandelic acid crystal powder falling on it disperses and falls around. As the powder moves along the outer side of the cloth disc 131, some of the powder will fall through the cloth hole 133, so that the powder falling on the top of the cloth disc 131 is evenly dispersed and falls.

[0024] Furthermore, an annular baffle 10 is fixed to the top of the upper support plate 5. When the powder is thrown outward under the action of centrifugal force, it can only reach the inner wall of the baffle 10 at most. Because it will be obstructed by the inner wall of the baffle 10, it can effectively prevent the powder from being thrown onto the inner wall of the drying tank 1, so that all the powder can be close to the vicinity of the hot airflow when it falls.

[0025] Example 2 Basically the same as in Example 1, such as Figures 4-5 As shown, the difference is that the feeder includes a conical hopper 141 fixed to the top of the support shaft 9. The conical hopper 141 is located directly below the discharge port of the injection pipe 4. Multiple leakage holes 142 are provided on the conical hopper 141, and the multiple leakage holes 142 are arranged from the inside to the outside.

[0026] When in use, as the support shaft 9 rotates, it drives the conical bucket 141 on it to rotate, and the mandelic acid crystal powder falling on it is scattered to the surroundings through the leakage hole 142.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A drying apparatus for producing mandelic acid, comprising a drying tank (1), wherein a feeding pipe (4) is installed through the upper part of the drying tank (1), characterized in that: A hot air pipe (2) is installed through the lower part of the drying tank (1) to provide upward hot air flow, and an exhaust pipe (11) is connected to the top of the drying tank (1), and a cyclone separator (12) is connected to the other end of the exhaust pipe (11). The inner wall of the drying tank (1) is fixed with two sets of support plates (5) at intervals. A support shaft (9) is rotatably installed between the two sets of support plates (5). A servo motor (6) that drives the support shaft (9) to rotate is installed at the bottom of the lower support plate (5). Several sets of baffles (7) are fixed along the circumference of the lower part of the support shaft (9). Multiple air holes (8) that allow hot air to pass through are opened on the baffles (7). The top of the support shaft (9) is provided with a cloth feeder, which can scatter the mandelic acid crystals that fall on its top to the surroundings as the cloth feeder rotates.

2. The mandelic acid production drying apparatus according to claim 1, characterized in that: The fabric feeder includes a fabric feed disc (131) fixed to the top of the support shaft (9). The top of the fabric feed disc (131) is fixed with a number of component baffles (132) at intervals along its circumference. The fabric feed disc (131) is provided with a number of fabric feed holes (133) that allow mandelic acid crystals to pass through at the position between adjacent baffles (132).

3. The mandelic acid production drying apparatus according to claim 1, characterized in that: The fabric feeder includes a conical hopper (141) fixed to the top of the support shaft (9), and multiple holes (142) are provided on the conical hopper (141), which are arranged to extend from the inside to the outside.

4. The mandelic acid production drying apparatus according to claim 1, characterized in that: The top of the upper support plate (5) is fixed with an annular enclosure (10).

5. The mandelic acid production drying apparatus according to claim 1, characterized in that: The material distributor is located directly below the outlet of the material injection pipe (4).

6. The mandelic acid production drying apparatus according to claim 1, characterized in that: The spoiler (7) is tilted upward at an angle of 20-40°.

7. The mandelic acid production drying apparatus according to claim 1, characterized in that: A heater (3) for rapidly raising the gas temperature is installed on the hot air pipe (2).

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