Salicylic acid raw material rectification preheating device

Abstract

The utility model belongs to the technical field of salicylic acid production, and particularly relates to a salicylic acid raw material rectification preheating device which comprises a distillation tower body, and the inner side of the distillation tower body is communicated with a feeding pipe; according to the step, a feeding pipe, an exhaust pipe, a heat preservation pipe, a heat preservation layer and a heat conduction strip are arranged, so that when the device is used for distilling and gas is exhausted through the exhaust pipe, the gas moves to be in contact with the heat conduction strip, heat is transferred to the other end, inserted into the inner side of the feeding pipe, of the device through the heat conduction strip, and therefore the feeding pipe is heated; the salicylic acid is preheated through the contact of the heat conducting strip and the heat conducting strip, and when the heat conducting strip transfers heat, the heat conducting strip is wrapped and covered through the heat preservation pipe and the heat preservation layer, so that the loss of the transferred heat can be further reduced, part of heat can be recycled and reused, and the loss of heat during gas discharge is reduced; and the practicability of the device is improved.

Description

Technical Field

[0001] This utility model relates to the field of salicylic acid production technology, specifically a salicylic acid raw material distillation and preheating device. Background Technology

[0002] Salicylic acid is a fat-soluble organic acid that is widely used in pharmaceutical manufacturing, as a preservative, bactericide, additive, or complexing agent. During the production of salicylic acid, it is necessary to use a distillation apparatus to distill it to ensure its purity, thereby facilitating its subsequent processing.

[0003] However, existing salicylic acid distillation methods mostly use distillation columns. When the distillate enters the inner side of the distillation column for distillation, the gas produced by distillation is mostly discharged directly. The gas carries a lot of heat when it is discharged, resulting in a large amount of heat loss that cannot be utilized, thus reducing the practicality of the device. Therefore, a salicylic acid raw material distillation preheating device is proposed to address the above problems. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A salicylic acid raw material distillation preheating device of this utility model includes a distillation column body. A feed pipe is connected to the inner side of the distillation column body, and an exhaust pipe is also connected to the inner side of the distillation column body. A heat insulation pipe is fixedly connected to the outer side of the exhaust pipe, and a heat insulation layer is fixedly connected to the inner side of the heat insulation pipe. The heat insulation pipe and the feed pipe are fixedly connected to the inner side of the heat insulation pipe, and both the feed pipe and the exhaust pipe are fixedly connected to the heat insulation layer. A drain pipe is connected to the inner side of the distillation column body. This step involves setting up a feed pipe, an exhaust pipe, a heat insulation pipe, and a heat insulation layer. The insulation layer and heat-conducting strips ensure that during distillation, when the gas is discharged through the exhaust pipe, it moves to contact the heat-conducting strips, which then transfer heat to the other end inserted inside the feed pipe, thus heating the feed pipe. When salicylic acid enters the feed pipe, it comes into contact with the heat-conducting strips, preheating the salicylic acid. Furthermore, the heat-conducting strips are wrapped and covered by insulation pipes and layers, further reducing heat loss and facilitating the recovery and reuse of some heat. This reduces heat loss during gas discharge and improves the practicality of the device.

[0006] Preferably, a support plate is fixedly connected to the outer side of the distillation column body, and a threaded rod is rotatably connected to the inner side of the support plate. A lifting plate is threadedly connected to the outer side of the threaded rod, and a first sealing plate is fixedly connected to the outer side of the lifting plate. Through grooves are opened on the surfaces of the feed pipe and the exhaust pipe. The first sealing plate and the through grooves are used in conjunction. This step involves setting up a support plate, threaded rods, a lifting plate, a first sealing plate, and through grooves. The inner arc-shaped surface of the first sealing plate is covered with a layer of rubber material. When the device is in use, by rotating the threaded rods, the lifting plate moves the first sealing plate to the through grooves of the feed pipe and the exhaust pipe, and seals them, so as to facilitate the stable discharge of gas and the entry of liquid. After long-term use, the ends of the heat-conducting strip are prone to contamination with impurities due to contact with hydraulic fluid and solids, which affects its thermal conductivity. By rotating the first sealing plate away from the feed pipe and the exhaust pipe, the heat-conducting strip is exposed to the external environment, making it easier to clean and restore its thermal conductivity, thereby improving the stability of the device.

[0007] Preferably, a second sealing plate is rotatably connected to the inner side of the through groove, and the second sealing plate and the first sealing plate are used in conjunction. In this step, by setting the second sealing plate, a layer of rubber is also provided on the inner arc surface of the second sealing plate. When covering the through groove, the second sealing plate is rotated to cover and tighten the through groove first, and then the first sealing plate is moved to tighten the through groove, thereby achieving a double seal on the through groove and further improving the pipeline sealing performance when the device is in use.

[0008] Preferably, a gear is fixedly connected to the outer side of the threaded screw, and a toothed plate meshes with the outer side of the gear. The support plate and the toothed plate are slidably connected. This step, by setting the gear and toothed plate, allows the rotation of one threaded screw to drive the rotation of its outer gear, which in turn drives the toothed plate to move, and the toothed plate to drive the movement of another gear, thus achieving synchronous rotation of the two gears. This enables the rotation of one threaded screw to drive the synchronous rotation of the other threaded screw, eliminating the need to tighten the threaded screws on both sides separately, and improving the ease of use of the device.

[0009] Preferably, a limiting strip is fixedly connected to the outer side of the toothed plate, and the limiting strip and the support plate are slidably connected. This step, by setting the limiting strip, ensures that when the toothed plate moves, it will drive the limiting strip to move. The limiting strip is further restricted by the support plate, making the movement of the toothed plate and its meshing with the gear more stable, thus improving the stability of the device.

[0010] Preferably, a slot is provided on the inner side of the feed pipe, and a retaining strip is fixedly connected to the outer side of the first sealing plate. The retaining strip and the slot work together. By setting the retaining strip and the slot, when the lower first sealing plate moves to further seal the through groove of the feed pipe, the retaining strip will be inserted into the inner side of the slot, thereby further sealing the first sealing plate and the feed pipe, making it more difficult for liquid to overflow from the feed pipe and improving the sealing performance of the device.

[0011] The advantages of this utility model are:

[0012] 1. This utility model, by setting up a feed pipe, an exhaust pipe, a heat insulation pipe, a heat insulation layer, and a heat-conducting strip, allows the gas to move to contact the heat-conducting strip when it is discharged through the exhaust pipe during distillation. The heat-conducting strip then transfers heat to the other end of the feed pipe inserted inside, thereby heating the feed pipe. When salicylic acid enters the feed pipe, it comes into contact with the heat-conducting strip, thus preheating the salicylic acid. Furthermore, the heat-conducting strip is wrapped and covered by the heat insulation pipe and the heat insulation layer during heat transfer, further reducing heat loss and facilitating the recovery and reuse of some heat. This reduces heat loss during gas discharge and improves the practicality of the device.

[0013] 2. This utility model incorporates a support plate, a threaded rod, a lifting plate, a first sealing plate, and a through groove. The inner arc-shaped surface of the first sealing plate is covered with a layer of rubber material. During use, rotating the threaded rod causes the lifting plate to move the first sealing plate to the through groove that is close to the feed pipe and exhaust pipe, thus sealing the device. This facilitates stable gas discharge and liquid entry. After prolonged use, the ends of the heat-conducting strip are prone to contamination due to contact with hydraulic fluid and solids, affecting its thermal conductivity. Rotating the first sealing plate away from the feed pipe and exhaust pipe exposes the heat-conducting strip to the external environment, making it easier to clean and restore its thermal conductivity, thereby improving the stability of the device. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a front view of the structure in this utility model;

[0016] Figure 2 This is a bottom view of the structure in this utility model;

[0017] Figure 3 This is a schematic diagram of the feed pipe structure in this utility model;

[0018] Figure 4 This is a schematic diagram of the exhaust pipe structure in this utility model;

[0019] Figure 5 This is a schematic diagram of the first sealing plate structure in this utility model.

[0020] In the diagram: 1. Distillation column body; 2. Feed pipe; 3. Exhaust pipe; 4. Insulation pipe; 5. Insulation layer; 6. Heat-conducting strip; 7. Drain pipe; 8. Support plate; 9. Threaded screw; 10. Lifting plate; 11. First sealing plate; 12. Through groove; 13. Second sealing plate; 14. Gear; 15. Toothed plate; 16. Limiting strip; 17. Locking strip; 18. Locking groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] Specific implementation examples are given below.

[0023] Please see Figures 1 to 5 As shown, a salicylic acid feedstock distillation preheating device includes a distillation column body 1. A feed pipe 2 and an exhaust pipe 3 are connected to the inner side of the distillation column body 1. An insulation pipe 4 is fixedly connected to the outer side of the exhaust pipe 3, and an insulation layer 5 is fixedly connected to the inner side of the insulation pipe 4. The insulation pipe 4 and the feed pipe 2 are fixedly connected, and a heat-conducting strip 6 is fixedly connected to the inner side of the insulation pipe 4. Both the feed pipe 2 and the exhaust pipe 3 are fixedly connected to the heat-conducting strip 6. A drain pipe 7 is connected to the inner side of the distillation column body 1. This step, by setting up the feed pipe 2, exhaust pipe 3, insulation pipe 4, insulation layer 5, and heat-conducting strip 6, enables… When the device is distilling, the gas exits through the exhaust pipe 3 and moves to contact the heat-conducting strip 6. The heat-conducting strip 6 transfers heat to the other end of the gas that is inserted into the feed pipe 2, thereby heating the feed pipe 2. When salicylic acid enters the feed pipe 2, it comes into contact with the heat-conducting strip 6, thereby preheating the salicylic acid. While the heat-conducting strip 6 is transferring heat, the heat-conducting strip 6 is wrapped and covered by the insulation pipe 4 and the insulation layer 5, which further reduces the loss of the transferred heat, so as to recover and reuse some of the heat. This reduces the heat loss during gas discharge and improves the practicality of the device.

[0024] Furthermore, such as Figure 1 and Figure 2 As shown, a support plate 8 is fixedly connected to the outer side of the distillation column body 1. A threaded screw 9 is rotatably connected to the inner side of the support plate 8. A lifting plate 10 is threadedly connected to the outer side of the threaded screw 9. A first sealing plate 11 is fixedly connected to the outer side of the lifting plate 10. A through groove 12 is formed on the surface of the feed pipe 2 and the exhaust pipe 3. The first sealing plate 11 and the through groove 12 are used in conjunction. This step involves setting up the support plate 8, the threaded screw 9, the lifting plate 10, the first sealing plate 11, and the through groove 12. The inner arc-shaped surface of the first sealing plate 11 is covered with a layer of rubber material. When the device is in use, by rotating the positive and negative threaded screws 9, the lifting plate 10 drives the first sealing plate 11 to move to the through groove 12 that is close to the feed pipe 2 and the exhaust pipe 3, and seals it to facilitate the stable discharge of gas and the entry of liquid. After long-term use, the ends of the heat-conducting strip 6 are prone to contamination with impurities due to contact with hydraulic fluid and solids, which affects its thermal conductivity. By rotating the first sealing plate 11 away from the feed pipe 2 and the exhaust pipe 3, the heat-conducting strip 6 is exposed to the external environment, which makes it easier to clean it, restore its thermal conductivity, and improve the stability of the device.

[0025] Furthermore, such as Figure 3 and Figure 4 As shown, a second sealing plate 13 is rotatably connected to the inner side of the through groove 12. The second sealing plate 13 and the first sealing plate 11 are used in conjunction. In this step, by setting the second sealing plate 13, a layer of rubber is also provided on the inner arc surface of the second sealing plate 13. When covering the through groove 12, the second sealing plate 13 is rotated to cover and tighten the through groove 12 first, and then the first sealing plate 11 is moved to tighten the through groove 12, thereby achieving a double seal on the through groove 12 and further improving the pipeline sealing performance when the device is in use.

[0026] Furthermore, such as Figure 2 As shown, a gear 14 is fixedly connected to the outer side of the screw 9, and a toothed plate 15 meshes with the outer side of the gear 14. The support plate 8 and the toothed plate 15 are slidably connected. This step, by setting the gear 14 and the toothed plate 15, allows the outer gear 14 to rotate when one screw 9 rotates. The outer gear 14 then drives the toothed plate 15 to move, and the toothed plate 15 drives the other gear 14 to move, achieving synchronous rotation of the two gears 14. This enables the rotation of one screw 9 to drive the other screw 9 to rotate synchronously, eliminating the need to tighten the screws 9 on both sides separately, thus improving the ease of use of the device.

[0027] Furthermore, such as Figure 1 and Figure 5As shown, a limiting strip 16 is fixedly connected to the outer side of the toothed plate 15, and the limiting strip 16 is slidably connected to the support plate 8. This step, by setting the limiting strip 16, ensures that when the toothed plate 15 moves, it will drive the limiting strip 16 to move. The support plate 8 limits the limiting strip 16, thereby further restricting the toothed plate 15, making the movement of the toothed plate 15 and its meshing with the gear 14 more stable, and improving the stability of the device.

[0028] Furthermore, such as Figure 3 and Figure 5 As shown, a slot 17 is provided on the inner side of the feed pipe 2, and a retaining strip 18 is fixedly connected to the outer side of the first sealing plate 11. The retaining strip 18 and the slot 17 work together. By setting the retaining strip 18 and the slot 17, when the lower first sealing plate 11 moves up to further seal the through groove 12 of the feed pipe 2, the retaining strip 18 will be inserted into the inner side of the slot 17, thereby further sealing the first sealing plate 11 and the feed pipe 2, making it more difficult for liquid to overflow from the feed pipe 2 and improving the sealing performance of the device.

[0029] The working principle is as follows: During distillation, rotating the second sealing plate 13 tightly seals the through groove 12. Rotating one threaded screw 9 drives the outer gear 14 to rotate, which in turn drives the toothed plate 15 to move. The toothed plate 15 then drives the other gear 14, achieving synchronous rotation of the two gears 14. This, in turn, causes the other threaded screw 9 to rotate synchronously. The rotation of the threaded screw 9 further seals the first sealing plate 11, ensuring a tight seal against the through groove 12. When the lower first sealing plate 11 is pressed against the through groove 12, it is inserted into the inside of the slot 17 by the clip 18, thereby further sealing the first sealing plate 11 and the feed pipe 2. When the gas is discharged through the exhaust pipe 3, it will move to contact the heat-conducting strip 6. The heat-conducting strip 6 will transfer heat to the other end inserted into the inside of the feed pipe 2, thereby heating the feed pipe 2. When the salicylic acid enters the inside of the feed pipe 2, it will contact the heat-conducting strip 6, thereby preheating the salicylic acid. After the salicylic acid is distilled, the distilled liquid can be discharged through the drain pipe 7.

[0030] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A salicylic acid feedstock distillation preheating device, comprising a distillation column body (1), characterized in that: The inner side of the distillation column body (1) is connected to a feed pipe (2), the inner side of the distillation column body (1) is connected to an exhaust pipe (3), the outer side of the exhaust pipe (3) is fixedly connected to a heat insulation pipe (4), the inner side of the heat insulation pipe (4) is fixedly connected to a heat insulation layer (5), the heat insulation pipe (4) and the feed pipe (2) are fixedly connected, the inner side of the heat insulation pipe (4) is fixedly connected to a heat-conducting strip (6), the feed pipe (2) and the exhaust pipe (3) are both fixedly connected to the heat-conducting strip (6), and the inner side of the distillation column body (1) is connected to a drain pipe (7).

2. The salicylic acid feedstock distillation preheating device according to claim 1, characterized in that: A support plate (8) is fixedly connected to the outside of the distillation column body (1). A screw rod (9) with positive and negative threads is rotatably connected to the inside of the support plate (8). A lifting plate (10) is threadedly connected to the outside of the screw rod (9). A first sealing plate (11) is fixedly connected to the outside of the lifting plate (10). A through groove (12) is opened on the surface of the feed pipe (2) and the exhaust pipe (3). The first sealing plate (11) and the through groove (12) are used in conjunction.

3. The salicylic acid feedstock distillation preheating device according to claim 2, characterized in that: The inner side of the through groove (12) is rotatably connected to a second sealing plate (13), which works in conjunction with the first sealing plate (11).

4. The salicylic acid feedstock distillation preheating device according to claim 3, characterized in that: A gear (14) is fixedly connected to the outside of the positive and negative threaded screw (9), and a toothed plate (15) meshes with the outside of the gear (14). The support plate (8) and the toothed plate (15) are slidably connected.

5. The salicylic acid feedstock distillation preheating device according to claim 4, characterized in that: A limiting strip (16) is fixedly connected to the outside of the toothed plate (15), and the limiting strip (16) and the support plate (8) are slidably connected.

6. The salicylic acid feedstock distillation preheating device according to claim 5, characterized in that: The feed pipe (2) has a slot (17) on its inner side, and a strip (18) is fixedly connected to the outer side of the first sealing plate (11). The strip (18) and the slot (17) are used together.

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