Purification device

Abstract

The utility model relates to the technical field of salicylic acid purification, in particular to a purification device which comprises a sublimation kettle body and a feeding device, a kettle cover is arranged above the sublimation kettle body, a stirring motor is arranged on the surface of the kettle cover, the output end of the stirring motor is fixedly connected with a stirring piece, and the feeding device is arranged on the surface of the kettle cover. The feeding device comprises a material box located above the kettle cover, four feeding pipes are fixedly connected to the lower surface of the material box, and a plurality of bolts are arranged at one end of each feeding pipe. The problem that materials are accumulated near the feeding port due to a traditional single discharging port is solved, the raw materials enter the sublimation kettle body from multiple positions and can be more evenly distributed in the kettle, good initial conditions are provided for subsequent mixing and purification operation, the materials are evenly heated and sublimated in the sublimation process, and the sublimation efficiency is improved. The product quality and the purification efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the field of salicylic acid purification technology, and in particular to a purification device. Background Technology

[0002] It is a white crystalline powder, odorless, with a slightly bitter taste that turns pungent. Its melting point is 158-161℃, and its boiling point is about 211℃ (sublimation). It is relatively stable at room temperature, but will gradually change color under light. Salicylic acid is slightly soluble in cold water and readily soluble in hot water, ethanol, ether, acetone, and other organic solvents. Chemical properties: It is acidic, stronger than benzoic acid. Because it contains both carboxyl and hydroxyl groups in its molecule, it can undergo a variety of chemical reactions, such as esterification (reacting with alcohols to form esters), neutralization (reacting with bases to form salts and water), etc. In addition, salicylic acid can also undergo substitution and oxidation reactions.

[0003] Salicylic acid is purified using a sublimation reactor. At room temperature, salicylic acid is a white needle-like crystal or monoclinic prismatic crystal with a melting point of 158–161°C. It can sublimate, which means that a solid substance turns into a gaseous state directly without melting when heated, and the gas will recrystallize into a solid when cooled. By utilizing this property, a sublimation reactor is used to create suitable temperature and pressure conditions to separate salicylic acid from impurities in the crude product, thus achieving the purpose of purification.

[0004] Existing technologies, such as the utility model with publication number CN202876420U, disclose a salicylic acid crystallization and purification device, which includes a crystal sublimation mechanism, a vacuum crystallization device, and a vacuum pumping device. The crystal sublimation mechanism is connected to the vacuum crystallization device, and the vacuum crystallization device is connected to the vacuum pumping device. The crystal sublimation mechanism is a sublimation kettle, and the vacuum crystallization device includes three or more vacuum crystallization tanks, which are connected by connecting pipes. The salicylic acid crystallization and purification device of this utility model has a simple structure and is easy to use. After sublimation, the crude salicylic acid undergoes multiple crystallization processes in the vacuum crystallization tanks, which greatly improves the purity of the product and effectively ensures the precision requirements of the product. This solves the problem that the purified salicylic acid crystals still cannot reach a certain purity requirement due to insufficient condensation during the crystallization process.

[0005] In daily work, it has been found that when using existing sublimation reactors for salicylic acid purification, the salicylic acid raw material is usually fed into the reactor through the feed inlet. This causes the material to accumulate near the feed inlet, resulting in uneven mixing during the mixing process. The accumulated salicylic acid may not sublimate completely due to slow heat transfer, while the salicylic acid in other thinner areas has already sublimated completely, resulting in uneven sublimation in both time and space. Utility Model Content

[0006] The purpose of this invention is to address the shortcomings of existing technologies where uneven material feeding leads to uneven sublimation, and to propose a purification device.

[0007] To achieve the above objectives, this utility model adopts the following technical solution: a purification device, comprising a sublimation kettle and a feeding device. A kettle cover is provided above the sublimation kettle, and a stirring motor is installed on the surface of the kettle cover. A stirring component is fixedly connected to the output end of the stirring motor. The feeding device is located on the surface of the kettle cover and includes a material box located above the kettle cover. Four feeding pipes are fixedly connected to the lower surface of the material box. Multiple bolts are installed at one end of each feeding pipe and are mounted on the surface of a valve cover. Four through holes are opened on the surface of the kettle cover, and the through holes, feeding pipes, and material box are sequentially connected. A drive motor is fixedly connected to the lower surface of the material box, and a stirring component is fixedly connected to the output end of the drive motor. Through these components, during feeding, the raw material can be poured into the material box, and then the drive motor is turned on. The drive motor, in conjunction with the stirring component, can stir the raw material, allowing it to enter the four feeding pipes and be discharged into the sublimation kettle through the feeding pipes, achieving multiple feeding points for convenient subsequent mixing and purification.

[0008] Preferably, the hopper is composed of a cylindrical section and a flared section fixedly connected to the top of the cylindrical section.

[0009] Preferably, the stirring assembly includes a stirring rod, and a guide block is fixedly connected to the surface of the stirring rod. The guide block is conical. By setting the above components, when the stirring assembly is stirring, the drive motor can rotate and stir through the stirring rod, and the conical guide block on the stirring rod can push the raw material at the bottom of the material box into the feed pipe.

[0010] Preferably, the surface of the material bin is provided with a transparent observation window, so that the internal condition of the material bin can be observed through the transparent observation window when the material bin is in use.

[0011] Preferably, the surface of the stirring element is provided with an auxiliary device, which includes a fixing ring fixed to the surface of the stirring element. Two extension arms are fixedly connected to the surface of the fixing ring, and a rubber block is fixedly connected to one side of each extension arm. Through the above components, when the stirring element is stirring, the fixing ring can drive the two extension arms and the rubber block fixed on the extension arms to rotate. The rubber block can scrape the material at the bottom corner of the sublimation reactor, thereby allowing the raw materials to be mixed evenly.

[0012] Preferably, one side of the rubber block is arc-shaped.

[0013] Preferably, the surface of the extension arm is fixedly connected with three rubber rods. Through the above-mentioned components, the extension arm can drive the rubber rods to stir the bottom of the sublimation vessel, thereby improving the overall mixing effect.

[0014] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0015] 1. In this utility model, by setting up a feeding device, the material is fed through a material box in conjunction with a control motor, a stirring component, and four feeding pipes. This reduces the problem of material accumulation near the feed port caused by a traditional single feed port. The raw materials enter the sublimation kettle from multiple positions, which can be more evenly distributed in the kettle. This provides good initial conditions for subsequent mixing and purification operations, and is conducive to the uniform heating and sublimation of materials during the sublimation process, thereby improving product quality and purification efficiency.

[0016] 2. In this utility model, by setting an auxiliary device, the bottom and bottom corner of the sublimation kettle can be scraped during the stirring process, thereby facilitating the mixing of raw materials and improving the overall mixing effect. Attached Figure Description

[0017] Figure 1 This utility model provides a three-dimensional structural schematic diagram of a purification device;

[0018] Figure 2 This utility model provides a schematic diagram of the feeding device structure of a purification apparatus;

[0019] Figure 3 This utility model proposes a purification device. Figure 2 Another perspective structural diagram;

[0020] Figure 4 This utility model provides a partial structural diagram of the feeding device of a purification apparatus;

[0021] Figure 5 This invention provides a cross-sectional structural schematic diagram of a purification device.

[0022] Legend:

[0023] 1. Sublimation vessel body; 2. Vessel lid; 3. Stirring motor; 4. Stirring component; 5. Feeding device; 51. Material box; 52. Feeding pipe; 53. Through hole; 54. Transparent observation window; 55. Bolt; 56. Stirring assembly; 561. Stirring rod; 562. Guide block; 57. Drive motor; 6. Auxiliary device; 61. Fixing ring; 62. Extension arm; 63. Rubber block; 64. Rubber rod. Detailed Implementation

[0024] Please see Figures 1-5This utility model provides a technical solution: a purification device, including a sublimation kettle body 1 and a feeding device 5. A kettle cover 2 is provided above the sublimation kettle body 1. A stirring motor 3 is provided on the surface of the kettle cover 2. A stirring element 4 is fixedly connected to the output end of the stirring motor 3. The feeding device 5 is provided on the surface of the kettle cover 2.

[0025] Specifically, the feeding device 5 includes a material box 51 located above the vessel cover 2. Four feeding pipes 52 are fixedly connected to the lower surface of the material box 51. Multiple bolts 55 are provided at one end of the feeding pipes 52 and are installed on the surface of the valve cover by the bolts 55. Four through holes 53 are opened on the surface of the vessel cover 2. The through holes 53, the feeding pipes 52 and the material box 51 are connected in sequence. A drive motor 57 is fixedly connected to the lower surface of the material box 51. A stirring assembly 56 is fixedly connected to the output end of the drive motor 57.

[0026] In this implementation plan: When feeding materials, the raw materials can be poured into the material box 51, and then the drive motor 57 can be turned on. The drive motor 57, together with the stirring component 56, can stir the raw materials, allowing them to enter the four feed pipes 52 and be discharged into the sublimation kettle 1 through the feed pipes 52, thus achieving multiple feeding points, which facilitates subsequent mixing and purification.

[0027] Specifically, the material box 51 is composed of a cylindrical part and a flared part fixedly connected to the top of the cylindrical part.

[0028] Specifically, the stirring assembly 56 includes a stirring rod 561, and a guide block 562 is fixedly connected to the surface of the stirring rod 561. The guide block 562 is cone-shaped.

[0029] In this embodiment: when the stirring assembly 56 is stirring, the drive motor 57 can rotate and stir through the stirring rod 561. The conical guide block 562 on the stirring rod 561 can push the raw material at the bottom of the material box 51 into the feed pipe 52.

[0030] Specifically, the surface of the material bin 51 is provided with a transparent observation window 54, which allows the inside of the material bin 51 to be observed when it is in use.

[0031] Specifically, the surface of the stirring component 4 is provided with an auxiliary device 6. The auxiliary device 6 includes a fixing ring 61 fixed to the surface of the stirring component 4. Two extension arms 62 are fixedly connected to the surface of the fixing ring 61, and a rubber block 63 is fixedly connected to one side of the extension arm 62.

[0032] In this embodiment: when the agitator 4 is stirring, it can drive the two extension arms 62 and the rubber block 63 fixed on the extension arms 62 to rotate through the fixing ring 61. The rubber block 63 can scrape the material at the bottom corner of the sublimation kettle body 1, so that the raw materials are mixed evenly.

[0033] Specifically, one side of the rubber block 63 is curved.

[0034] Specifically, three rubber rods 64 are fixedly connected to the surface of the extension arm 62. The extension arm 62 can drive the rubber rods 64 to stir the bottom of the sublimation vessel 1, thereby improving the overall mixing effect.

[0035] Working principle: During use, the raw materials are poured into the material box 51. The flared part of the material box 51 can pour the raw materials into the cylindrical part. Then, the drive motor 57 is turned on, which drives the stirring rod 561 and the conical guide block 562 to rotate. The stirring rod 561 can stir the raw materials in the material box 51, allowing the raw materials to fall into the four feed pipes 52. The four feed pipes 52 discharge the raw materials into the inner wall of the sublimation vessel 1 through the through hole 53 on the lid 2. At the same time, the guide block 562 is conical and can guide the raw materials at the bottom of the material box 51 into the feed pipes 52. Then, the stirring motor 3 is turned on, which drives the stirring component 4 to rotate for mixing. When the stirring component 4 rotates, it can drive the fixing ring 61 and the extension arm 62 to rotate. The extension arm 62 drives the rubber block 63 and the rubber rod 64 to rotate, scraping the bottom and bottom corner of the sublimation vessel 1 respectively, improving the mixing uniformity and the overall purification effect.

Claims

1. A purification apparatus, comprising a sublimation vessel (1) and a feeding device (5), characterized in that: The sublimation vessel body (1) is provided with a vessel cover (2) on top. A stirring motor (3) is provided on the surface of the vessel cover (2). A stirring component (4) is fixedly connected to the output end of the stirring motor (3). A feeding device (5) is provided on the surface of the vessel cover (2). The feeding device (5) includes a material box (51) located above the vessel cover (2). Four feeding pipes (52) are fixedly connected to the lower surface of the material box (51). A plurality of bolts (55) are provided at one end of the feeding pipes (52) and are installed on the surface of the valve cover by the bolts (55). Four through holes (53) are opened on the surface of the vessel cover (2). The through holes (53), the feeding pipes (52) and the material box (51) are connected in sequence. A drive motor (57) is fixedly connected to the lower surface of the material box (51). A stirring component (56) is fixedly connected to the output end of the drive motor (57).

2. The purification apparatus according to claim 1, characterized in that: The hopper (51) is composed of a cylindrical section and a flared section fixedly connected to the top of the cylindrical section.

3. The purification apparatus according to claim 1, characterized in that: The stirring assembly (56) includes a stirring rod (561), and a guide block (562) is fixedly connected to the surface of the stirring rod (561). The guide block (562) is cone-shaped.

4. The purification apparatus according to claim 1, characterized in that: The surface of the hopper (51) is provided with a transparent observation window (54).

5. The purification apparatus according to claim 1, characterized in that: The surface of the stirring component (4) is provided with an auxiliary device (6), which includes a fixing ring (61) fixed on the surface of the stirring component (4). Two extension arms (62) are fixedly connected to the surface of the fixing ring (61), and a rubber block (63) is fixedly connected to one side of the extension arm (62).

6. The purification apparatus according to claim 5, characterized in that: One side of the rubber block (63) is arc-shaped.

7. The purification apparatus according to claim 5, characterized in that: The surface of the extension arm (62) is fixedly connected with rubber rods (64), and there are three rubber rods (64).

Images