Feeding device for refining azelaic acid

Abstract

The invention relates to the technical field of chemical purification, and discloses a feeding device for azelaic acid refining, the feeding device comprises a rectifying still body, a stirring mechanism is arranged on the inner surface of the rectifying still body, the stirring mechanism comprises a motor, the motor is fixedly connected with the upper surface of the rectifying still body, an output shaft of the motor is fixedly connected with a stirring disc, and the stirring disc is fixedly connected with the rectifying still body. The feeding device comprises a stirring disc, stirring grooves are formed in the upper surface of the stirring disc in a circumferential array shape, fixed blocks are fixedly connected to the inner surfaces of the stirring grooves, movable rods penetrate through the inner surfaces of the stirring grooves and are in sliding connection with the stirring grooves, and the movable rods penetrate through the fixed blocks and are in sliding connection with the fixed blocks. According to the stirring device for the azelaic acid raw material, by utilizing the arrangement of a vertical rod, a movable hole, a fixed rod, a trapezoidal rod and a sleeve, in the stirring process, in cooperation with a trapezoidal block, a movable rod and an abutting rod I, the fixed rod can shake while rotating through a motor, so that the azelaic acid raw material is stirred more sufficiently.

Description

Technical Field

[0001] The invention relates to the technical field of chemical purification, in particular to a feeding device for refining azelaic acid. Background Art

[0002] Azelaic acid is an important chemical raw material in the industrial field. It is widely used in many important fields such as fragrances, cosmetics, medical treatment, rubber, artificial leather, nylon, fiber, capacitors, oils, flame retardants, flocculants, anti-corrosion agents, lubricants, etc. Azelaic acid is also an important chemical raw material in the industrial field. It can be used to produce polyol esters as lubricants for fibers and jet turbines, paint desiccants, plasticizers, etc. At present, industrial production methods mostly use oleic acid as raw material, and the reaction mechanism is double bond oxidation cleavage. The oxidation methods include chromic acid oxidation method, potassium permanganate method, nitric acid method, air oxidation method, ruthenium salt oxidation method, cobalt salt method, hydrogen peroxide-nitric acid method, etc. The above methods are either high in cost or seriously polluting, and are economically undesirable.

[0003] Chinese patent publication number CN101279909B discloses "a method for refining and purifying azelaic acid, comprising the following steps: step 1, subjecting azelaic acid mixture to vacuum distillation, with the vacuum controlled at 500Pa and the distillation kettle temperature not exceeding 180°C, distilling out the components with boiling points before nonanoic acid and nonanoic acid, and then steam distilling, so that the sum of the weight ratio of monobasic acids with boiling points before nonanoic acid in the undistilled materials is not greater than 3%; step 2, subjecting the undistilled materials to vacuum distillation, with the vacuum controlled at about 300Pa and the distillation kettle temperature not exceeding 240℃, steam distillation, distill out the crude azelaic acid; step 3, the distilled crude azelaic acid is mixed with the solvent in a mass ratio of 1:2-8, heated to 70-90℃, stirred for 30 minutes, cooled to 25℃, stirred for another 30 minutes, crystallized, and centrifuged to obtain a crystalline product; step 4, the crystalline product is dried under reduced pressure to obtain the final azelaic acid product. The advantages of the present invention: the product purity reaches more than 99% and the sum of the monobasic acid content is less than 0.05%, which simplifies the process and reduces production costs. "

[0004] During the conception process, the applicant searched a large number of patent documents on the patent network. For example, Chinese patent publication number CN101279909B discloses "a method for refining and purifying azelaic acid". However, since most methods for refining azelaic acid are to first stir the azelaic acid raw materials, heat the stirred raw materials through a distillation kettle to form crystals, and then load them, most distillation kettles lack stirring and loading mechanisms, which leads to low efficiency in the production of azelaic acid. Therefore, a loading device for refining azelaic acid is proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides a feeding device for refining azelaic acid, which solves the problem of low efficiency of azelaic acid in the existing production process.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a feeding device for refining azelaic acid, comprising a distillation kettle body, the inner surface of the distillation kettle body is provided with a stirring mechanism, the stirring mechanism comprises a motor, the motor is fixedly connected to the upper surface of the distillation kettle body, the output shaft of the motor is fixedly connected to a stirring disk, the upper surface of the stirring disk is provided with stirring grooves in a circumferential array, the inner surface of the stirring groove is fixedly connected to a fixed block, a movable rod is penetrated by the inner surface of the stirring groove and is slidably connected to the movable rod, the movable rod penetrates the fixed block and is slidably connected to the fixed block, and a stirring rod mechanism is provided on the outer arc surface of the movable rod.

[0009] Preferably, a lower hopper is fixedly connected to the inner surface of the distillation kettle body, and a support rod is fixedly connected to the upper surface of the lower hopper in a circular array. The cross-sectional shape of the movable rod is conical, and the curved surface of the movable rod is slidably connected to the support rod.

[0010] Preferably, the outer arc surface of the distillation kettle body is fixedly connected to the heating machine body, the upper surface of the distillation kettle body is provided with a feed inlet, and the lower surface of the distillation kettle body is penetrated by a discharge pipe and fixedly connected to the discharge pipe.

[0011] Preferably, the stirring rod mechanism includes a vertical rod, which is fixedly connected to the outer arc surface of the movable rod, the front surface of the vertical rod is provided with movable holes in a linear array, the inner surface of the movable hole is slidably connected to the fixed rod, and the front surface of the fixed rod is fixedly connected to a trapezoidal rod.

[0012] Preferably, sleeves are fixedly connected to the rear surfaces of the vertical rods in a linear array, and the sleeves are in the same horizontal plane as the movable holes and are the same in number.

[0013] Preferably, the inner surface of the distillation kettle body is fixedly connected with trapezoidal blocks in a circumferential array, and the trapezoidal blocks are slidably connected to the trapezoidal rods.

[0014] Preferably, an anti-blocking mechanism is provided on the lower surface of the stirring plate, and the anti-blocking mechanism includes a sliding rod, which passes through the fixed block and is slidably connected to the fixed block, the lower surface of the sliding rod is fixedly connected to a connecting plate, the lower surface of the connecting plate is fixedly connected to a clearing rod, and the lower surface of the connecting plate is fixedly connected to force-bearing rods in a circular array.

[0015] Preferably, the upper surface of the discharge pipe is fixedly connected with two support rods in a circular array, and the two support rods are slidably connected to the lower surface of the force-bearing rod.

[0016] Preferably, a movable groove is formed on the lower surface of the fixed block, a slider is slidably connected to the inner surface of the movable groove, the slider is hinged to one end of the bracket, and the connecting plate is hinged to the other end of the bracket.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the present invention provides a feeding device for refining azelaic acid, which has the following

[0019] Beneficial effects:

[0020] 1. The feeding device for refining azelaic acid utilizes the settings of a distillation kettle, a stirring mechanism, a heating machine body, a discharge pipe and a feed port. The motor drives the stirring disk to rotate. After cooperating with the stirring rod mechanism, the azelaic acid can be fully stirred. After cooperating with the heating machine body to heat the raw materials inside the distillation kettle to form crystals, the azelaic acid crystals enter the discharge pipe through the cooperation of the stirring disk and the lower hopper. Through this setting, the distillation kettle has the functions of feeding and stirring, thereby improving the production efficiency of azelaic acid.

[0021] 2. This feeding device for refining azelaic acid utilizes the arrangement of a vertical rod, a movable hole, a fixed rod, a trapezoidal rod and a sleeve. During the stirring process, in conjunction with the trapezoidal block, the movable rod and the abutment rod, the fixed rod can be rotated by a motor and can shake at the same time, thereby making the stirring of the azelaic acid raw material more sufficient.

[0022] 3. This feeding device for refining azelaic acid utilizes the settings of a second support rod, a clearing rod, a connecting plate and a sliding rod. After the motor drives the connecting plate to rotate, the cooperation of the second support rod and the force-bearing rod can drive the connecting plate to move up and down, thereby preventing azelaic acid crystals from being blocked during feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the overall structure of a feeding device for refining azelaic acid proposed by the present invention;

[0024] Figure 2 This is a schematic cross-sectional view of the overall structure of a feeding device for refining azelaic acid proposed by the present invention;

[0025] Figure 3 This is a schematic diagram of the overall structure of a stirring mechanism of a feeding device for refining azelaic acid proposed by the present invention;

[0026] Figure 4 A feeding device for refining azelaic acid proposed by the present invention Figure 3 A schematic diagram of the structure enlargement of part A;

[0027] Figure 5 A feeding device for refining azelaic acid proposed by the present invention Figure 2 A schematic diagram of the structure of part B in the middle is enlarged;

[0028] Figure 6 This is a schematic cross-sectional view of the stirring mechanism of a feeding device for refining azelaic acid proposed by the present invention;

[0029] Figure 7 A feeding device for refining azelaic acid proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of part C in the middle.

[0030] In the figure: 1. distillation kettle body; 2. stirring mechanism; 21. motor; 22. stirring plate; 23. stirring tank; 24. fixed block; 25. movable rod; 26. stirring rod mechanism; 261. vertical rod; 262. movable hole; 263. fixed rod; 264. trapezoidal rod; 265. sleeve; 266. trapezoidal block; 3. lower hopper; 4. push rod 1; 5. heating machine body; 6. feed inlet; 7. discharge pipe; 8. anti-blocking mechanism; 81. slide rod; 82. connecting plate; 83. dredging rod; 84. force rod; 85. push rod 2; 86. movable tank; 87. slide block; 88. bracket. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 - Figure 7A feeding device for refining azelaic acid comprises a distillation kettle body 1, the inner surface of the distillation kettle body 1 is provided with a stirring mechanism 2, the stirring mechanism 2 comprises a motor 21, the motor 21 is fixedly connected to the upper surface of the distillation kettle body 1, the output shaft of the motor 21 is fixedly connected to a stirring disk 22, the upper surface of the stirring disk 22 is provided with stirring grooves 23 in a circumferential array, through the opening of the stirring grooves 23, not only the azelaic acid raw material can be stirred, but also after the azelaic acid raw material passes through the heating machine body 5 to form crystals, the azelaic acid crystals can fall into the discharge pipe 7 through the stirring groove 23 and the lower hopper 3 for feeding, the inner surface of the stirring groove 23 is fixedly connected to a fixed block 24, the inner surface of the fixed block 24 is provided with a spring, one end of the spring is connected to the fixed block 24 The inner surface of the stirring tank 23 is fixed, and the other end is fixed to the movable rod 25. Through this arrangement, the movable rod 25 can be shaken to improve the stirring efficiency. The inner surface of the stirring tank 23 is penetrated by the movable rod 25 and is slidably connected to the movable rod 25. The movable rod 25 penetrates the fixed block 24 and is slidably connected to the fixed block 24. The outer arc surface of the movable rod 25 is provided with a stirring rod mechanism 26. The inner surface of the distillation kettle body 1 is fixedly connected to the lower hopper 3. The upper surface of the lower hopper 3 is fixedly connected to the push rod 4 in a circular array. The cross-sectional shape of the movable rod 25 is conical. The curved surface of the movable rod 25 is slidably connected to the push rod 4. The movable rod 25 cooperates with the push rod 4. After the stirring disk 22 is rotated by the motor 21, the movable rod 25 can be driven to rotate. After the rod 4 squeezes the movable rod 25, it can drive the stirring rod mechanism 26 to shake, thereby improving the stirring efficiency. The outer arc surface of the distillation kettle body 1 is fixedly connected with the heating machine body 5. Through the setting of the heating machine body 5, the azelaic acid in the distillation kettle body 1 can be heated to achieve azelaic acid crystallization. The upper surface of the distillation kettle body 1 is provided with a feed port 6, and the feed port 6 is provided with a pipeline. The raw material of azelaic acid can be transported to the distillation kettle body 1 through the pipeline. The lower surface of the distillation kettle body 1 is penetrated by a discharge pipe 7 and is fixedly connected to the discharge pipe 7. The material that forms azelaic acid crystals can be taken out from the distillation kettle body 1 through the discharge pipe 7, so that the production efficiency of azelaic acid is improved. The stirring rod mechanism 26 includes a vertical rod 261, and the vertical rod 261 is connected to the vertical rod 261. The outer arc surface of the movable rod 25 is fixedly connected, and the front surface of the vertical rod 261 is provided with movable holes 262 in a linear array. The fixed rod 263 is limited by the opened movable holes 262, so that the fixed rod 263 is effectively more stable. The inner surface of the movable hole 262 is slidably connected with the fixed rod 263, and the front surface of the fixed rod 263 is fixedly connected with the trapezoidal rod 264. The rear surface of the vertical rod 261 is fixedly connected with the sleeve 265 in a linear array. The sleeve 265 and the movable hole 262 are in the same horizontal plane and the number is the same. At the same time, a spring is provided on the inner surface of the sleeve 265, one end of the spring is fixed to the inner surface of the sleeve 265, and the other end is fixed to the fixed rod 263. Through this arrangement, after the trapezoidal rod 264 contacts the trapezoidal block 266,The trapezoidal rod 264 drives the fixed rod 263 to move, and compresses the spring at the same time. After the trapezoidal block 266 is no longer in contact with the trapezoidal rod 264, it is restored by the spring force to form a reciprocating shake, thereby improving the stirring efficiency. The inner surface of the distillation kettle body 1 is fixedly connected with the trapezoidal block 266 in a circular array. The trapezoidal block 266 is slidably connected to the trapezoidal rod 264. The lower surface of the stirring plate 22 is provided with an anti-blocking mechanism 8. The anti-blocking mechanism 8 includes a sliding rod 81. The sliding rod 81 passes through the fixed block 24 and is slidably connected to the fixed block 24. The outer arc surface of the sliding rod 81 is sleeved with a spring. Through this arrangement, the lower surface of the sliding rod 81 is fixedly connected with a connecting plate 82 The lower surface of the connecting plate 82 is fixedly connected with a dredging rod 83, and the dredging rod 83 is at the same horizontal plane as the discharge pipe 7. Through this arrangement, after the dredging rod 83 moves up and down, it can prevent azelaic acid crystallization from being blocked. The lower surface of the connecting plate 82 is fixedly connected with a force-bearing rod 84 in a circumferential array, and the upper surface of the discharge pipe 7 is fixedly connected with a second support rod 85 in a circumferential array. The second support rod 85 is slidably connected to the lower surface of the force-bearing rod 84. By utilizing the arrangement of the second support rod 85, the dredging rod 83, the connecting plate 82 and the sliding rod 81, after the motor 21 drives the connecting plate 82 to rotate, through the cooperation of the second support rod 85 and the force-bearing rod 84, it can The connecting plate 82 can be driven to move up and down, so as to prevent the azelaic acid crystals from being blocked when feeding. A movable groove 86 is provided on the lower surface of the fixed block 24. The movable groove 86 is provided to cooperate with the slider 87 to make the slider 87 more stable. The inner surface of the movable groove 86 is slidably connected with the slider 87. The slider 87 is hinged to one end of the bracket 88, and the connecting plate 82 is hinged to the other end of the bracket 88. By utilizing the arrangement of the rectification kettle body 1, the stirring mechanism 2, the heating machine body 5, the discharge pipe 7 and the feed port 6, the motor 21 drives the stirring disk 22 to rotate. After cooperating with the stirring rod mechanism 26, the azelaic acid can be charged. After the stirring, the raw materials inside the distillation kettle are heated in cooperation with the heating machine body 5, so that after the crystals are formed, the azelaic acid crystals are made to enter the discharge pipe 7 through the cooperation of the stirring disk 22 and the lower hopper 3. Through this setting, the distillation kettle has the functions of feeding and stirring, which improves the production efficiency of azelaic acid. By using the setting of the vertical rod 261, the movable hole 262, the fixed rod 263, the trapezoidal rod 264 and the sleeve 265, during the stirring process, the fixed rod 263 can be rotated by the motor 21 and shaken at the same time, so that the stirring of the azelaic acid raw material is more sufficient.

[0033] Working principle: when it is necessary to feed the refined azelaic acid, the azelaic acid raw material is input into the distillation kettle body 1 through the pipeline arranged in the feed port 6, and then the motor 21 is started. The motor 21 drives the output shaft to rotate, and the stirring plate 22 is driven by the stirring tank 23 to rotate, and at the same time, the azelaic acid raw material in the distillation kettle body 1 is stirred. During the stirring process, the stirring plate 22 drives the movable rod 25 to rotate. During the rotation process, the curved surface of the movable rod 25 is squeezed by the push rod 4 and will shrink into the stirring tank 23, and at the same time, the spring in the fixed block 24 is compressed, and the movable rod 25 drives the vertical rod 261 to move toward the output shaft direction of the motor 21, and the vertical rod 261 drives the fixed rod 263 and the trapezoidal rod 264 to move toward the output shaft direction of the motor 21. After the movable rod 25 is no longer in contact with the push rod 4, the movable rod 25 and the stirring rod mechanism 26 are restored by the spring, so that the stirring mechanism 2 and the stirring rod mechanism 26 vibrate to make the stirring more sufficient. When the motor 21 rotates 261, the vertical rod 261 will drive the fixed rod 263, the trapezoidal rod 264 and the sleeve 265 to rotate at the same time. During the rotation, the inclined surface of the trapezoidal rod 264 is squeezed by the trapezoidal block 266, which will drive the fixed rod 263 to move toward the output shaft direction of the motor 21, and compress the spring in the sleeve 265. After the trapezoidal rod 264 is no longer in contact with the trapezoidal block 266, the fixed rod 263 is restored by the elastic force of the spring, forming a secondary shaking of the stirring rod mechanism 26, thereby achieving full stirring of the azelaic acid raw material. In the process of processing the azelaic acid raw material, the azelaic acid raw material at the lower hopper 3 and the azelaic acid raw material in the distillation kettle body 1 can be stirred at the same time through the stirring disk 22 and the force-bearing rod 84 set in the anti-blocking mechanism 8. At the same time, with the multiple groups of fixed rods 263, most of the azelaic acid raw materials in the distillation kettle body 1 can be effectively stirred, so that the quality of azelaic acid in the production process is significantly improved;

[0034] After the azelaic acid raw material is fully stirred, the azelaic acid raw material is heated by the heating machine body 5. After the azelaic acid raw material is formed into crystals, the motor 21 is started to drive the stirring disk 22 and the connecting plate 82 to rotate at the same time. After the azelaic acid formed into crystals enters the inner surface of the distillation kettle body 1 through the stirring tank 23, it enters the discharge pipe 7 through the lower hopper 3. At the same time, after the connecting plate 82 is rotated by the motor 21, the connecting plate 82 drives the force-bearing rod 84 to rotate after rotation. After the force-bearing rod 84 contacts the abutment rod 85, the connecting plate 82 moves upward, and at the same time drives the slide bar 81 to move upward, and at the same time compresses the spring on the slide bar 81, and drives the slider 87 to move forward in the movable groove 86. Through the mutual cooperation of the spring and the abutment rod 85, the dredging rod 83 is reciprocated up and down in the lower hopper 3 to dredge the azelaic acid crystals. With the cooperation of the stirring tank 23, the azelaic acid crystals will not be blocked in the distillation kettle body 1, so that the production efficiency of azelaic acid is improved.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A feeding device for refining azelaic acid, comprising a distillation kettle body (1), characterized in that: The inner surface of the distillation kettle body (1) is provided with a stirring mechanism (2), and the stirring mechanism (2) comprises a motor (21), and the motor (21) is fixedly connected to the upper surface of the distillation kettle body (1), and the output shaft of the motor (21) is fixedly connected to a stirring disk (22), and the upper surface of the stirring disk (22) is provided with stirring grooves (23) in a circumferential array, and the inner surface of the stirring groove (23) is fixedly connected to a fixed block (24), and the inner surface of the stirring groove (23) is penetrated by a movable rod (25) and is slidably connected to the movable rod (25), and the movable rod (25) penetrates the fixed block (24) and is slidably connected to the fixed block (24), and the outer arc surface of the movable rod (25) is provided with a stirring rod mechanism (26).

2. The feeding device for refining azelaic acid according to claim 1, characterized in that: The inner surface of the distillation kettle body (1) is fixedly connected to a lower hopper (3), and the upper surface of the lower hopper (3) is fixedly connected to a support rod (4) in a circular array. The cross-sectional shape of the movable rod (25) is conical, and the curved surface of the movable rod (25) is slidably connected to the support rod (4).

3. The feeding device for refining azelaic acid according to claim 2, characterized in that: The outer arc surface of the distillation kettle body (1) is fixedly connected to a heating machine body (5), the upper surface of the distillation kettle body (1) is provided with a feed inlet (6), and the lower surface of the distillation kettle body (1) is penetrated by a discharge pipe (7) and fixedly connected to the discharge pipe (7).

4. The feeding device for refining azelaic acid according to claim 3, characterized in that: The stirring rod mechanism (26) comprises a vertical rod (261), wherein the vertical rod (261) is fixedly connected to the outer arc surface of the movable rod (25), the front surface of the vertical rod (261) is provided with movable holes (262) in a linear array, the inner surface of the movable hole (262) is slidably connected to a fixed rod (263), and the front surface of the fixed rod (263) is fixedly connected to a trapezoidal rod (264).

5. The feeding device for refining azelaic acid according to claim 4, characterized in that: The rear surface of the vertical rod (261) is fixedly connected with sleeves (265) in a linear array shape, and the sleeves (265) and the movable holes (262) are located in the same horizontal plane and have the same number.

6. The feeding device for refining azelaic acid according to claim 5, characterized in that: The inner surface of the rectification kettle body (1) is fixedly connected with trapezoidal blocks (266) in a circumferential array, and the trapezoidal blocks (266) are slidably connected to the trapezoidal rods (264).

7. The feeding device for refining azelaic acid according to claim 6, characterized in that: The lower surface of the stirring disc (22) is provided with an anti-blocking mechanism (8), and the anti-blocking mechanism (8) comprises a sliding rod (81), the sliding rod (81) passes through the fixed block (24) and is slidably connected to the fixed block (24), the lower surface of the sliding rod (81) is fixedly connected to a connecting plate (82), the lower surface of the connecting plate (82) is fixedly connected to a dredging rod (83), and the lower surface of the connecting plate (82) is fixedly connected to a force-bearing rod (84) in a circular array.

8. The feeding device for refining azelaic acid according to claim 7, characterized in that: The upper surface of the discharge pipe (7) is fixedly connected with a second support rod (85) in a circular array, and the second support rod (85) is slidably connected to the lower surface of the force-bearing rod (84).

9. The feeding device for refining azelaic acid according to claim 8, characterized in that: A movable groove (86) is provided on the lower surface of the fixed block (24), and a slider (87) is slidably connected to the inner surface of the movable groove (86). The slider (87) is hinged to one end of the bracket (88), and the connecting plate (82) is hinged to the other end of the bracket (88).

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