Lipoic acid intermediate addition equipment

Abstract

The utility model relates to the technical field of lipoic acid intermediate production, in particular to lipoic acid intermediate addition equipment. Comprising a jacketed kettle, a stirring rod is rotatably arranged in the jacketed kettle, and a wall scraping structure is fixed on the stirring rod in the jacketed kettle; the wall scraping structure comprises an inverted-U-shaped support fixed to the stirring rod, L-shaped scrapers are arranged on the outer sides of the vertical part and the straight part on the lower side of the support, the scrapers are connected with the support through springs, a plurality of sliding rods are fixed to the scrapers and slidably connected with the support, and a guide assembly is slidably arranged in the lower end of the support in the vertical direction. A magnet is fixed at the upper end of the guide assembly, a turntable is concentrically fixed on the stirring rod below the jacket kettle, and an electromagnet corresponding to the magnet up and down is fixed on the turntable. The addition equipment can keep the scrapers not in contact with the inner edge of the side wall of the jacket kettle and the upper end surface of the bottom plate of the jacket kettle during stirring, so that the abrasion of the jacket kettle and the scrapers can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of thioctic acid intermediate production technology, specifically to an thioctic acid intermediate addition device. Background Technology

[0002] Lipoic acid intermediates are powerful antioxidants that can effectively remove free radicals and have wide applications in the pharmaceutical and food industries.

[0003] In the preparation of thioctic acid intermediates, water, sodium sulfide, and catalyst are added to a reaction vessel and stirred to dissolve them at 20-25°C. Ethyl 6,8-dichlorooctanoate is then added, followed by sulfur. After reacting for 0.5-1 hour, the temperature is naturally raised to 75-85°C, and stirring continues for another 0.5-1 hour. Once the reaction is complete, the mixture is allowed to settle and separate into layers. The lower oil phase is transferred to a hydrolysis vessel. Water, liquid alkali, and catalyst are then added to the hydrolysis vessel, and the mixture is kept at 70-75°C with stirring for 10-12 hours until hydrolysis is complete. The mixture is then filtered while hot, and the filtrate is transferred to an acidification vessel for acidification and filtration to obtain crude thioctic acid. During the reaction in both the reaction vessel and the hydrolysis vessel, the inner walls of both vessels must be scraped to prevent material adhesion.

[0004] Patent document CN220126202U discloses a thioctic acid intermediate addition apparatus. Starting a rotating machine causes the rotating shaft to rotate, thereby agitating the thioctic acid with stirring strips. Simultaneously, a scraper can be used to scrape off the thioctic acid from the inner wall of the chamber, facilitating cleaning. However, in this technical solution, the scraper is constantly in contact with the inner wall of the chamber. After prolonged agitation, both the inner wall and the scraper experience severe wear, thus affecting the service life. Utility Model Content

[0005] The main objective of this invention is to provide a thioctic acid intermediate addition device that can intermittently scrape the inner wall of the reactor as needed, thereby improving the service life of the scraping structure.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] An octanoic acid intermediate addition apparatus includes a jacketed vessel made of stainless steel. An inlet pipe and an outlet pipe are fixedly connected to the upper and lower ends of the jacketed vessel, respectively. A stirring rod is rotatably mounted inside the jacketed vessel, with its lower end penetrating the lower side wall of the jacketed vessel. A wall-scraping structure is fixed to the stirring rod inside the jacketed vessel. The wall-scraping structure includes an inverted U-shaped support fixed to the stirring rod. An L-shaped scraper is arranged on the outer side of the vertical part and the lower straight part of the support. Multiple sliding rods are fixed to the scrapers, and these sliding rods are parallel to each other, penetrating the support and slidably connected to it, with the sliding rods pointing towards the axis of the jacketed vessel. One end of the scraper is tilted upwards. After the scraper moves along the axial direction of the slide bar towards the outside of the jacketed vessel, the vertical part of the scraper can contact the inner edge of the side wall of the jacketed vessel, and the flat part of the lower side of the scraper can contact the upper end surface of the bottom plate of the jacketed vessel. A guide assembly is slidably installed in the vertical direction inside the lower end of the support. When the guide assembly moves downwards, it can drive the lowermost slide bar to move along its axial direction. A magnet is fixed at the upper end of the guide assembly, and the magnetic poles of the magnet are arranged vertically. A turntable is concentrically fixed on the stirring rod below the jacketed vessel. An electromagnet corresponding to the magnet is fixed on the turntable, and the magnetic poles of the electromagnet are arranged vertically.

[0008] Specifically, a motor for driving the stirring rod to rotate is fixed at the upper end of the jacketed vessel.

[0009] Specifically, the guide assembly includes a wedge block that is slidably connected to the vertical part of the support. The inclined surface of the wedge block is in slidable contact with the upper end of the lowermost slide rod. The inclined surface of the wedge block is inclined upward towards the outer side of the jacketed vessel, and a magnet is fixed to the upper end of the wedge block.

[0010] Specifically, a vertical guide rod is fixed to the lower end of the wedge block, and the guide rod is slidably inserted into a vertical hole on the straight part of the lower side of the bracket.

[0011] Specifically, the jacketed vessel has a lower shell fixed at its lower end, and the turntable is located inside the lower shell.

[0012] Specifically, a conductive slip ring is fixed inside the lower shell. The conductive slip ring is concentric with the turntable. The rotating part of the conductive slip ring is fixedly connected to the turntable, and the fixed part of the conductive slip ring is fixedly connected to the lower shell. The power supply is electrically connected to the electromagnet through the conductive slip ring.

[0013] Specifically, the scraper is connected to the bracket by a spring, and when the electromagnet is energized, the magnetic poles at the upper end of the electromagnet and the lower end of the magnet are opposite.

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

[0015] 1. This additive equipment can keep the scraper from contacting the inner edge of the jacketed vessel side wall and the upper surface of the jacketed vessel bottom plate during stirring, which can reduce the wear of the jacketed vessel and the scraper. When scraping is required, the scraper moves outward along the axial direction of the slide rod to scrape the inner edge of the jacketed vessel side wall and the upper surface of the jacketed vessel bottom plate, which can improve the service life of the scraper and reduce the wear of the inner wall of the jacketed vessel.

[0016] 2. The scraper is driven by the attraction force of an electromagnet to a magnet, which drives the scraper in a non-contact manner. The structure is simple and convenient for maintenance of the scraping structure.

[0017] 3. When maintaining the stirring rod, the stirring rod and scraper can be directly removed from the jacketed vessel for easy maintenance.

[0018] 4. The scraper and the bracket are connected by a spring. When the electromagnet is energized, the magnetic poles at the upper end of the electromagnet and the lower end of the magnet are opposite. After the electromagnet is energized, it attracts the magnet and drives the scraper to move through the guide component. The electromagnet does not need to be energized continuously during operation, which can reduce energy consumption. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the internal structure of this utility model.

[0020] Figure 2 This is a cross-sectional view of a jacketed vessel.

[0021] Figure 3 This is a schematic diagram of a scraper scraping the wall of a jacketed vessel.

[0022] Figure 4 for Figure 2 A schematic diagram of region A in the middle.

[0023] Figure 5 for Figure 3 A magnified view of region B in the middle.

[0024] The components in the attached diagram are named as follows: 1. Jacketed vessel, 2. Stirring rod, 3. Inlet pipe, 4. Support, 5. Slide rod, 6. Scraper, 7. Wedge, 8. Guide rod, 9. Magnet, 10. Turntable, 11. Electromagnet, 12. Conductive slip ring, 13. Outlet pipe, 14. Motor, 15. Lower shell. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Example 1: Refer to Figures 1-5As shown, a thioctic acid intermediate addition apparatus includes a jacketed vessel 1 made of stainless steel. An inlet pipe 3 and an outlet pipe 13 are fixedly connected to the upper and lower ends of the jacketed vessel 1, respectively. A stirring rod 2 is rotatably mounted inside the jacketed vessel 1. A motor 14 for driving the stirring rod 2 is fixed to the upper end of the jacketed vessel 1.

[0027] The lower end of the stirring rod 2 penetrates the lower side wall of the jacketed vessel 1, and a wall scraping structure is fixed on the stirring rod 2 inside the jacketed vessel 1.

[0028] The scraping structure includes an inverted U-shaped support 4 fixed on the stirring rod 2. An L-shaped scraper 6 is provided on the outer side of the vertical part and the lower straight part of the support 4. Multiple sliding rods 5 are fixed on the scraper 6. The multiple sliding rods 5 are parallel to each other, pass through the support 4, and are slidably connected to the support 4. The sliding rods 5 are inclined upward towards the end of the jacketed vessel 1 axis.

[0029] After the scraper 6 moves outward along the axial direction of the slide bar 5, the vertical part of the scraper 6 can contact the inner edge of the side wall of the jacketed vessel 1, and the flat part on the lower side of the scraper 6 can contact the upper end surface of the bottom plate of the jacketed vessel 1.

[0030] A guide component is slidably installed in the vertical direction inside the lower end of the bracket 4. When the guide component moves downward, it can drive the bottom slide rod 5 to move along its axial direction.

[0031] Specifically, the guide assembly includes a wedge 7 that is slidably connected to the vertical part of the support 4. The inclined surface of the wedge 7 is in slidable contact with the upper end of the lowermost slide rod 5, and the inclined surface of the wedge 7 is inclined upward towards the outer side of the jacketed vessel 1.

[0032] The lower end of the wedge 7 is fixed with a vertical guide rod 8, which is slidably inserted into the vertical hole on the straight part of the lower side of the bracket 4.

[0033] A magnet 9 is fixed to the upper end of the guide assembly. Specifically, the magnet 9 is fixed to the upper end of the wedge block 7, and the magnetic poles of the magnet 9 are arranged vertically.

[0034] A turntable 10 is concentrically fixed on the stirring rod 2 below the jacketed vessel 1. A lower shell 15 is fixed to the lower end of the jacketed vessel 1, and the turntable 10 is located inside the lower shell 15. An electromagnet 11 corresponding vertically to the magnet 9 is fixed on the turntable 10, and the magnetic poles of the electromagnet 11 are arranged vertically.

[0035] A conductive slip ring 12 is fixed inside the lower shell 15. The conductive slip ring 12 is concentric with the turntable 10. The rotating part of the conductive slip ring 12 is fixedly connected to the turntable 10, and the fixed part of the conductive slip ring 12 is fixedly connected to the lower shell 15. The power supply is electrically connected to the electromagnet 11 through the conductive slip ring 12.

[0036] During operation, heat transfer oil is circulated into the jacket of the jacketed vessel 1, and the motor 14 is started. The motor 14 can stir the material in the jacketed vessel 1. When the motor 14 is started, the power supply of the electromagnet 11 is turned on. In this embodiment, the lower pole of the magnet 9 is the N pole. During the stirring of the material in the jacketed vessel 1, the direction of the current flowing through the electromagnet 11 is adjusted so that the upper pole of the electromagnet 11 is the N pole after it is energized. Then, after the electromagnet 11 is energized, the upper pole of the electromagnet 11 is the same as the lower pole of the magnet 9. When the stirring rod 2 and the turntable 10 rotate, the electromagnet 11 and the magnet 9 repel each other, and the scraper 6 cannot move outward along the axial direction of the slide rod 5.

[0037] When wall scraping is required, the direction of the current flowing through electromagnet 11 is adjusted so that the upper magnetic pole of electromagnet 11 is the S pole after it is energized. Therefore, the upper magnetic pole of electromagnet 11 is different from the lower magnetic pole of magnet 9, and electromagnet 11 and magnet 9 attract each other. When magnet 9 moves downward, it drives wedge 7 and guide rod 8 downward. Under the guidance of the inclined surface of wedge 7 on the upper end of the lowermost sliding rod 5, scraper 6 can move along the axial direction of sliding rod 5 towards the outside of jacketed vessel 1 until the vertical part of scraper 6 contacts the inner edge of the side wall of jacketed vessel 1 and the flat part of the lower side of scraper 6 contacts the upper end surface of the bottom plate of jacketed vessel 1. Subsequently, when stirring rod 2 and turntable 10 rotate, scraper 6 can perform wall scraping operations on the inner edge of the side wall of jacketed vessel 1 and the upper end surface of the bottom plate of jacketed vessel 1.

[0038] Example 2: Based on Example 1, referring to... Figures 1-5 As shown, the scraper 6 is connected to the bracket 4 by a spring. When the electromagnet 11 is energized, the magnetic poles of the upper end of the electromagnet 11 and the lower end of the magnet 9 are opposite.

[0039] In this embodiment, since the scraper 6 is connected to the support 4 by a spring, when the stirring rod 2 and the turntable 10 rotate, under the elastic force of the spring, the vertical part of the scraper 6 does not contact the inner edge of the side wall of the jacketed vessel 1, and the flat part on the lower side of the scraper 6 does not contact the upper end surface of the bottom plate of the jacketed vessel 1. That is, there is no need to energize the electromagnet 11 when stirring the material in the jacketed vessel 1.

[0040] In this embodiment, the lower end of magnet 9 is the N pole. When wall scraping is required, electromagnet 11 is energized. After electromagnet 11 is energized, the upper magnetic pole of electromagnet 11 is the S pole. Therefore, the upper magnetic pole of electromagnet 11 is different from the lower magnetic pole of magnet 9, and electromagnet 11 and magnet 9 attract each other. When magnet 9 moves downward, it drives wedge 7 and slide rod 5 downward. The spring is stretched. Under the guidance of the inclined surface of wedge 7 on the upper end of the lowermost slide rod 5, scraper 6 can move along the axial direction of slide rod 5 towards the outside of jacketed vessel 1 until the vertical part of scraper 6 contacts the inner edge of the side wall of jacketed vessel 1 and the flat part of the lower side of scraper 6 contacts the upper end surface of the bottom plate of jacketed vessel 1. When stirring rod 2 and turntable 10 rotate, scraper 6 can perform wall scraping on the inner edge of the side wall of jacketed vessel 1 and the upper end surface of the bottom plate of jacketed vessel 1. During operation, electromagnet 11 does not need to be continuously energized, which can reduce energy consumption.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A thioctic acid intermediate addition apparatus, comprising a jacketed vessel (1) made of stainless steel, wherein an inlet pipe (3) and an outlet pipe (13) are fixedly connected to the upper and lower ends of the jacketed vessel (1), respectively, and a stirring rod (2) is rotatably disposed inside the jacketed vessel (1), characterized in that, The lower end of the stirring rod (2) penetrates the lower side wall of the jacketed vessel (1). A scraping structure is fixed on the stirring rod (2) inside the jacketed vessel (1). The scraping structure includes a support (4) fixed on the stirring rod (2) and in an inverted U-shape. An L-shaped scraper (6) is provided on the outside of the vertical part and the horizontal part on the lower side of the support (4). Multiple sliding rods (5) are fixed on the scraper (6). The multiple sliding rods (5) are parallel to each other. The sliding rods (5) penetrate the support (4) and are slidably connected to the support (4). The end of the sliding rod (5) facing the axis of the jacketed vessel (1) is inclined upward. The scraper (6) moves outward from the jacketed vessel (1) along the axial direction of the sliding rod (5). The vertical part of the scraper (6) after movement can contact the inner edge of the side wall of the jacketed vessel (1), and the flat part of the scraper (6) on the lower side can contact the upper end surface of the bottom plate of the jacketed vessel (1). A guide component is slidably arranged in the vertical direction inside the lower end of the support (4). When the guide component moves downward, it can drive the bottom slide rod (5) to move along its axial direction. A magnet (9) is fixed at the upper end of the guide component. The magnetic poles of the magnet (9) are arranged vertically. A turntable (10) is concentrically fixed on the stirring rod (2) below the jacketed vessel (1). An electromagnet (11) corresponding to the magnet (9) is fixed on the turntable (10). The magnetic poles of the electromagnet (11) are arranged vertically.

2. The lipoic acid intermediate addition apparatus according to claim 1, characterized in that, The jacketed vessel (1) is fixed with a motor (14) that drives the stirring rod (2) to rotate.

3. The lipoic acid intermediate addition apparatus according to claim 1, characterized in that, The guide assembly includes a wedge (7) that is slidably connected to the vertical part of the support (4). The inclined surface of the wedge (7) is in slidable contact with the upper end of the lowermost slide rod (5). The inclined surface of the wedge (7) is inclined upward towards the outer side of the jacketed vessel (1). A magnet (9) is fixed to the upper end of the wedge (7).

4. The lipoic acid intermediate addition apparatus according to claim 3, characterized in that, The wedge (7) has a vertical guide rod (8) fixed at its lower end. The guide rod (8) is slidably inserted into the vertical hole on the straight part of the bracket (4) on the lower side.

5. The lipoic acid intermediate addition apparatus according to claim 1, characterized in that, The jacketed vessel (1) has a lower shell (15) fixed at its lower end, and the turntable (10) is located inside the lower shell (15).

6. The lipoic acid intermediate addition apparatus according to claim 5, characterized in that, A conductive slip ring (12) is fixed inside the lower shell (15). The conductive slip ring (12) is concentric with the turntable (10). The rotating part of the conductive slip ring (12) is fixedly connected to the turntable (10), and the fixed part of the conductive slip ring (12) is fixedly connected to the lower shell (15). The power supply is electrically connected to the electromagnet (11) through the conductive slip ring (12).

7. The lipoic acid intermediate addition apparatus according to claim 1, characterized in that, The scraper (6) is connected to the bracket (4) by a spring. When the electromagnet (11) is energized, the magnetic poles of the upper end of the electromagnet (11) and the lower end of the magnet (9) are opposite.

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