Nitrilation stirring device for production of sebaconitrile

Abstract

The utility model relates to the technical field of nitrile stirring devices, in particular to a nitrile stirring device for producing sebaconitrile, which can enable the temperatures of the upper part and the lower part of a nitrile chamber to be different, reduce the application of tandem reaction kettles and have good practicability. Comprising a cyanation kettle, a feeding pipe and a residue discharging pipe, the device further comprises a catalyst bed, a shaft tube, a sleeve, a plurality of stirring rods, an upper partition plate, a heater I and a distillation tube, the catalyst bed is cylindrical, the catalyst bed is vertically mounted in the nitrile chamber of the nitrile kettle and close to the edge, the shaft tube is vertically and rotatably mounted at the top of the nitrile kettle, the lower part of the shaft tube extends into the upper part of the nitrile chamber of the nitrile kettle, and the lower part of the shaft tube extends into the upper part of the nitrile chamber of the nitrile kettle; the casing pipe is sleeved on the outer wall of the lower part of the shaft pipe in a liftable manner, the casing pipe is in transmission connection with the shaft pipe through a key slot and a key, a plurality of stirring rods are arranged on the outer wall of the casing pipe, the upper partition plate is arranged on the outer wall of the upper end of the casing pipe, the heater I is arranged on the upper partition plate, the distillation pipe is arranged on the nitrile kettle, and the input end of the distillation pipe is communicated with the top of a nitrile cavity of the nitrile kettle.

Description

Technical Field

[0001] This utility model relates to the technical field of nitrification stirring devices, and in particular to a nitrification stirring device for the production of sebacate. Background Technology

[0002] Sebaconitrile is an intermediate in the synthesis of pharmaceuticals, dyes, and other organic materials. It is a chemical intermediate in the synthesis of sebacic acid and an important intermediate product in the production of new fibers, films, and plastic monomers. Chinese invention patent application CN116023299A discloses a method and apparatus for the continuous synthesis of sebaconitrile from sebacic acid. This apparatus includes n reactors connected in series, each with a different temperature. Each reactor has an overflow device at the top and a temperature control device at the bottom. Adjacent reactors are connected via the overflow devices, and the reactors are connected to the distillation column via a crude nitrile tank.

[0003] However, the existing apparatus for the continuous synthesis of sebacite from sebacite does not describe the specific structure of the reaction vessel and the crude nitrile tank. Therefore, it is proposed that a nitrification stirring device with different temperatures at the top and bottom is proposed to allow the reactants to react at different temperatures, thereby reducing the need for series reaction vessels and making it practical. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a nitrification stirring device for the production of sebacate that can make the upper and lower parts of the nitrification chamber have different temperatures, reducing the need for series reactors and offering good practicality.

[0005] This utility model discloses a nitrification stirring device for the production of sebacate, comprising a nitrification reactor, a feeding pipe, and a discharge pipe. The nitrification reactor has an internal nitrification chamber. The feeding pipe and discharge pipe are installed on the nitrification reactor and are both connected to the nitrification chamber. The device also includes a catalyst bed, a shaft tube, a sleeve, multiple stirring rods, an upper partition, a heater, and a distillation tube. The catalyst bed is cylindrical and vertically installed in the nitrification chamber of the nitrification reactor near the edge. The shaft tube is vertically rotatably installed on the top of the nitrification reactor, with its lower part extending outwards. A sleeve, which can be raised and lowered, is fitted onto the lower outer wall of the shaft tube in the upper part of the nitrification chamber of the nitrification reactor. The sleeve and the shaft tube are connected by a keyway and a key drive. Multiple stirring rods are installed on the outer wall of the sleeve. An upper baffle is installed on the upper outer wall of the sleeve, and a heater is installed on the upper baffle. A distillation tube is installed on the nitrification reactor, and the inlet end of the distillation tube is connected to the top of the nitrification chamber of the nitrification reactor. The catalyst bed is loaded with catalyst. The upper baffle divides the nitrification chamber of the nitrification reactor into upper and lower parts. During operation, the reactant mixture is added through the feed pipe. In the nitrification chamber of the nitrification reactor, the rotation of the shaft tube drives the rotation of the sleeve through the transmission action of the keyway and key. The sleeve drives multiple stirring rods to rotate, causing the stirring rods to stir the reactant mixture, ensuring that the reactant mixture and the catalyst on the catalyst bed are in full contact for the nitrification reaction. The heater heats the reactant mixture. Due to the separation by the upper partition, the temperature of the reactant mixture above the upper partition is higher than that below the upper partition, achieving different nitrification reactor temperatures. After the nitrification reaction is completed, the sleeve slides up and down along the shaft tube to adjust the height of the upper partition, so that the upper partition is slightly lower than the liquid surface of the reactant mixture. The heater heats and evaporates the liquid surface on the upper partition, causing the sebacate obtained from the reaction to evaporate and be discharged through the distillation tube. During the distillation process, the sleeve gradually descends to achieve distillation separation. The residual liquid after distillation is discharged through the residue discharge tube. Compared with the existing technology, it can make the upper and lower parts of the nitrification chamber have different temperatures, achieving different nitrification effects, thereby reducing the use of series reactors and improving practicality.

[0006] Preferably, the upper partition is inverted conical; the inverted conical upper partition can gather a certain amount of reactant mixture and allow these reactant mixtures to be efficiently heated by the heater, thereby improving the distillation efficiency.

[0007] Preferably, it also includes a flange plate and a rotary joint. The shaft tube is tubular, with its upper end extending above the nitrification reactor. The flange plate is installed on the upper port of the shaft tube, and a rotary joint is installed on the flange plate, communicating with the interior of the shaft tube. The shaft tube and the sleeve are elastically connected by a tension spring. The rotary joint is connected to an external gas supply system, which inputs gas into the shaft tube, causing the internal gas pressure of the shaft tube to increase, thereby pushing the sleeve to descend. When the gas is extracted from the shaft tube through the rotary joint, the tension spring pulls the sleeve upward, thereby adjusting the height of multiple stirring rods and the upper baffle. By setting the rotary joint, the gas supply pipeline is prevented from becoming entangled, resulting in a simple structure and good practicality.

[0008] Preferably, the assembly also includes an electromagnetic push rod, a cable, and an electric slip ring. The electromagnetic push rod is installed inside the lower end of the shaft tube. The piston rod of the electromagnetic push rod contacts the inner wall of the sleeve through the clearance hole of the shaft tube. The lower end of the cable is electrically connected to the electromagnetic push rod, and the upper end of the cable passes through the flange plate and is electrically connected to the rotating end of the electric slip ring. The electric slip ring is mounted on the nitrification reactor by a bracket. The controller of the electromagnetic push rod is electrically connected to the electromagnetic push rod through the electric slip ring and the cable. When the piston rod of the electromagnetic push rod extends, it presses against the inner wall of the sleeve, thereby locking the relative position of the shaft tube and the sleeve. When the piston rod of the electromagnetic push rod retracts, it disengages from the inner wall of the sleeve, thereby locking the shaft tube and the sleeve in contact. At this time, the sleeve can move up and down along the shaft tube. By setting the electric slip ring, the cable will not get tangled when the shaft tube and the flange plate rotate.

[0009] Preferably, it also includes a pressure relief valve. A pressure relief valve is installed at the bottom of the sleeve, and the input end of the pressure relief valve is connected to the interior of the shaft tube and the sleeve. The input end of the rotary joint is connected to the pipeline for conveying raw material gas, such as ammonia. When raw material gas needs to be input, the piston rod of the electromagnetic push rod extends to lock the sleeve and the shaft tube. When the pressure of the raw material gas in the shaft tube and the sleeve is greater than the opening pressure of the pressure relief valve, the pressure relief valve opens, and ammonia is input into the reactant mixture in the acrylonitrile chamber of the acrylonitrile reactor. After the piston rod of the electromagnetic push rod retracts to unlock the sleeve and the shaft tube, the input raw material gas drives the sleeve to slide up and down along the shaft tube, integrating the raw material gas conveying and distribution mechanism, further simplifying the structure.

[0010] Preferably, it also includes a lower plate and a second heater. The lower plate is installed at the lower end of the sleeve, and the second heater is installed on the lower plate. The second heater heats the lower part of the nitrification chamber of the nitrification reactor, thereby allowing the temperature of the upper and lower parts of the nitrification chamber of the nitrification reactor to be independently controlled, thus improving the nitrification effect.

[0011] Preferably, it also includes a driven wheel, a motor, a driving wheel, and a transmission belt. The driven wheel is concentrically mounted on the upper end of the shaft tube. The motor is mounted on the nitrification reactor via a bracket. The output shaft of the motor is concentrically mounted on the driving wheel. The transmission belt is fitted onto the driven wheel and the driving wheel. The motor drives the driving wheel to rotate, and the driving wheel drives the driven wheel to rotate via the transmission belt. The driven wheel drives the shaft tube to rotate, thereby driving the shaft tube.

[0012] Compared with the prior art, the beneficial effects of this utility model are: it can make the upper and lower parts of the nitrification chamber have different temperatures, thereby achieving different nitrification effects, thus reducing the application of series reactors and making it more practical. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front sectional view of the present invention;

[0015] Figure 3 This is a schematic diagram of the isometric structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the nitrification reactor during the decomposition process;

[0017] Figure 5 This is a structural diagram of the shaft tube, sleeve, stirring rod, upper partition, heater, rotary joint, electromagnetic push rod, electric slip ring, pressure relief valve and lower plate, etc.

[0018] Figure 6 This is a structural diagram showing the disassembled state of the shaft tube, sleeve, stirring rod, upper partition, heater, rotary joint, electromagnetic push rod, electric slip ring, pressure relief valve, and lower plate.

[0019] The following are labels in the attached diagram: 1. Nitriding vessel; 2. Feed pipe; 3. Residue discharge pipe; 4. Catalyst bed; 5. Shaft tube; 6. Sleeve; 7. Stirring rod; 8. Upper partition plate; 9. Heater one; 10. Distillation tube; 11. Flange plate; 12. Rotary joint; 13. Electromagnetic push rod; 14. Cable; 15. Electric slip ring; 16. Pressure relief valve; 17. Lower plate; 18. Heater two; 19. Driven wheel; 20. Motor; 21. Drive wheel; 22. Drive belt. Detailed Implementation

[0020] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. This utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to make the disclosure of this utility model more thorough and complete.

[0021] Example 1

[0022] like Figures 1 to 4As shown, a nitrification stirring device for the production of sebacate includes a nitrification reactor 1, a feed pipe 2, and a discharge pipe 3. The nitrification reactor 1 has a nitrification chamber inside. The feed pipe 2 and the discharge pipe 3 are installed on the nitrification reactor 1 and are both connected to the nitrification chamber. The device also includes a catalyst bed 4, a shaft tube 5, a sleeve 6, multiple stirring rods 7, an upper partition 8, a heater 9, and a distillation tube 10. The catalyst bed 4 is cylindrical and is vertically installed in the nitrification chamber of the nitrification reactor 1 near the edge. The shaft tube 5 is vertically rotatably installed on the top of the nitrification reactor 1, with its lower part extending into the upper part of the nitrification chamber. The sleeve 6 is vertically and retractably fitted onto the lower outer wall of the shaft tube 5. The sleeve 6 and the shaft tube 5 are connected by a keyway and a key drive. Multiple stirring rods 7 are installed on the outer wall of the sleeve 6. An upper partition 8 is installed on the upper outer wall of the sleeve 6. A heater 9 is installed on the upper partition 8. A distillation tube 10 is installed on the nitrification kettle 1. The input end of the distillation tube 10 is connected to the top of the nitrification chamber of the nitrification kettle 1. The upper partition 8 is inverted conical. It also includes a lower plate 17 and a heater 18. The lower plate 17 is installed at the lower end of the sleeve 6, and the heater 18 is installed on the lower plate 17. It also includes a driven wheel 19, a motor 20, a driving wheel 21, and a transmission belt 22. The driven wheel 19 is concentrically installed on the upper end of the shaft tube 5. The motor 20 is installed on the nitrification kettle 1 through a bracket. The output shaft of the motor 20 is concentrically installed on the driving wheel 21. The transmission belt 22 is fitted on the driven wheel 19 and the driving wheel 21.

[0023] The catalyst bed 4 is loaded with catalyst. The upper partition 8 divides the nitrification chamber of the nitrification reactor 1 into upper and lower parts. During operation, the reactant mixture is added to the nitrification chamber of the nitrification reactor 1 through the feed pipe 2. The motor 20 drives the drive wheel 21 to rotate, and the drive wheel 21 drives the driven wheel 19 to rotate through the transmission belt 22. The driven wheel 19 drives the shaft tube 5 to rotate. When the shaft tube 5 rotates, it drives the sleeve 6 to rotate through the transmission action of the keyway and key. The sleeve 6 drives multiple stirring rods 7 to rotate, so that the multiple stirring rods 7 stir the reactant mixture, so that the reactant mixture and the catalyst on the catalyst bed 4 can fully contact each other to carry out the nitrification reaction. The heater 1 9 works to heat the reactant mixture. Due to the division of the upper partition 8, the temperature of the reactant mixture above the upper partition 8 is higher than that of the reactant mixture below the upper partition 8. The heater 2 18 heats the nitrification chamber of the nitrification reactor 1. Heating is performed at the bottom of the chamber, allowing independent temperature control of the upper and lower parts of the nitrification chamber in the nitrification reactor 1, achieving different nitrification reactor temperatures. After the nitrification reaction is completed, the sleeve 6 slides up and down along the shaft tube 5 to adjust the height of the upper partition 8, making the upper partition 8 slightly lower than the liquid surface of the reactant mixture. The heater 9 heats and evaporates the liquid surface on the upper partition 8. The inverted conical upper partition 8 can collect a certain amount of reactant mixture, and these reactant mixtures are efficiently heated by the heater 9, improving the distillation efficiency. The sebacate obtained from the reaction evaporates and is discharged through the distillation tube 10. During the distillation process, the sleeve 6 gradually descends to achieve distillation separation. The residual liquid after distillation is discharged through the residual discharge tube 3. Compared with the existing technology, it can make the upper and lower parts of the nitrification chamber have different temperatures, achieving different nitrification effects, thereby reducing the use of series reactors and improving the nitrification effect.

[0024] Example 2

[0025] like Figures 5 to 6 As shown, based on Embodiment 1, it also includes a flange plate 11 and a rotary joint 12. The shaft tube 5 is tubular, with its upper end extending above the nitrification reactor 1. The flange plate 11 is installed on the upper port of the shaft tube 5, and the rotary joint 12 is installed on the flange plate 11, communicating with the interior of the shaft tube 5. It also includes an electromagnetic push rod 13, a cable 14, and an electric slip ring 15. The electromagnetic push rod 13 is installed at the lower end of the shaft tube 5, and the piston rod of the electromagnetic push rod 13 contacts the inner wall of the sleeve 6 through the clearance hole of the shaft tube 5. The lower end of the cable 14 is electrically connected to the electromagnetic push rod 13, and the upper end of the cable 14 passes through the flange plate 11 and is electrically connected to the rotating end of the electric slip ring 15. The electric slip ring 15 is installed on the nitrification reactor 1 by a bracket. It also includes a pressure limiting valve 16, which is installed at the bottom of the sleeve 6, and the input end of the pressure limiting valve 16 communicates with the interior of the shaft tube 5 and the sleeve 6.

[0026] The shaft tube 5 and the sleeve 6 are elastically connected by a tension spring. The rotary joint 12 is connected to an external gas supply system, which introduces gas into the shaft tube 5, increasing the internal pressure and pushing the sleeve 6 downward. When the gas is extracted from the shaft tube 5 through the rotary joint 12, the tension spring pulls the sleeve 6 upward, thereby adjusting the height of the multiple stirring rods 7 and the upper partition 8. The rotary joint 12 is used to prevent the gas supply pipeline from becoming entangled. The controller of the electromagnetic push rod 13 is electrically connected to the electromagnetic push rod 13 through an electric slip ring 15 and a cable 14. When the piston rod of the electromagnetic push rod 13 extends, it presses against the inner wall of the sleeve 6, thereby locking the relative position of the shaft tube 5 and the sleeve 6. When the piston rod of the electromagnetic push rod 13 retracts, it disengages from the inner wall of the sleeve 6, thereby allowing the shaft tube 5 to move downward. When sleeve 6 and shaft tube 5 are locked in contact, sleeve 6 can move up and down along shaft tube 5. By setting an electric slip ring 15, cable 14 will not get tangled when shaft tube 5 and flange plate 11 rotate. The input end of rotary joint 12 is connected to the pipeline for conveying raw material gas, such as ammonia. When raw material gas needs to be input, the piston rod of electromagnetic push rod 13 extends to lock sleeve 6 and shaft tube 5. When the pressure of raw material gas in shaft tube 5 and sleeve 6 is greater than the opening pressure of pressure limiting valve 16, pressure limiting valve 16 opens, and ammonia is input into the reactant mixture in the nitrification chamber of nitrification reactor 1. After the piston rod of electromagnetic push rod 13 retracts to unlock sleeve 6 and shaft tube 5, the input raw material gas drives sleeve 6 to slide up and down along shaft tube 5. The mechanism for conveying and distributing raw material gas is integrated, further simplifying the structure.

[0027] like Figures 1 to 6As shown, this utility model discloses a nitrification stirring device for the production of sebacate. During operation, the reactant mixture is first added to the nitrification chamber of the nitrification reactor 1 through the feed pipe 2. The piston rod of the electromagnetic push rod 13 extends to lock the sleeve 6 and the shaft tube 5. When the pressure of the raw material gas in the shaft tube 5 and the sleeve 6 exceeds the opening pressure of the pressure limiting valve 16, the pressure limiting valve 16 opens, and ammonia gas is input into the reactant mixture in the nitrification chamber of the nitrification reactor 1. Then, the motor 20 drives the drive wheel 21 to rotate, which in turn drives the driven wheel 19 to rotate via the transmission belt 22. The driven wheel 19 drives the shaft tube 5 to rotate, and the rotation of the shaft tube 5, through the transmission action of the keyway and key, drives the sleeve 6 to rotate. The sleeve 6 drives multiple stirring rods 7 to rotate, thus stirring the reactant mixture. The reactant mixture is brought into full contact with the catalyst on the catalyst bed 4 to carry out the nitrification reaction. Then, heater 9 and heater 18 work to independently heat the upper and lower parts of the reactant mixture. Due to the separation of the upper partition 8, the temperature of the reactant mixture above the upper partition 8 is higher than that below the upper partition 8, thus achieving different nitrification reactor temperatures. Finally, after the nitrification reaction is completed, the sleeve 6 slides up and down along the shaft tube 5 to adjust the height of the upper partition 8 so that the upper partition 8 is slightly lower than the liquid surface of the reactant mixture. Heater 9 heats and evaporates the liquid surface on the upper partition 8, causing the sebacate obtained from the reaction to evaporate and be discharged through the distillation tube 10. During the distillation process, the sleeve 6 gradually descends to achieve the distillation separation effect. The residual liquid after distillation is discharged through the residual discharge tube 3.

[0028] The main functions achieved by this utility model are:

[0029] 1. It can make the upper and lower parts of the nitrification chamber have different temperatures, thus achieving different nitrification effects and reducing the need for series reactors;

[0030] 2. Capable of efficiently distilling sebacate;

[0031] 3. The stirring mechanism can be raised and lowered to improve the stirring effect.

[0032] The nitrification stirring device for the production of sebacate nitrile of this utility model has common mechanical installation, connection and setting methods, and can be implemented as long as it can achieve its beneficial effect. The nitrification kettle 1, catalyst bed 4, shaft tube 5, sleeve 6, heater 1 9, flange plate 11, rotary joint 12, electromagnetic push rod 13, cable 14, electric slip ring 15, pressure relief valve 16, heater 2 18, driven wheel 19, motor 20, driving wheel 21 and transmission belt 22 of the nitrification stirring device for the production of sebacate nitrile of this utility model are purchased from the market. Technical personnel in this industry only need to install and operate it according to the accompanying instruction manual, without requiring any creative work from those skilled in the art.

[0033] All technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0034] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A nitrification stirring apparatus for the production of sebacate, comprising a nitrification reactor (1), a feeding pipe (2), and a discharge pipe (3), wherein the nitrification reactor (1) is provided with a nitrification chamber, the feeding pipe (2) and the discharge pipe (3) are installed on the nitrification reactor (1), and both the feeding pipe (2) and the discharge pipe (3) are connected to the nitrification chamber; characterized in that, It also includes a catalyst bed (4), a shaft tube (5), a sleeve (6), multiple stirring rods (7), an upper partition (8), a heater (9), and a distillation tube (10). The catalyst bed (4) is cylindrical and is vertically installed in the nitrification chamber of the nitrification reactor (1) near the edge. The shaft tube (5) is vertically rotatably installed on the top of the nitrification reactor (1). The lower part of the shaft tube (5) extends into the upper part of the nitrification chamber of the nitrification reactor (1). The sleeve (6) is vertically and rotatably fitted on the lower outer wall of the shaft tube (5). The sleeve (6) and the shaft tube (5) are connected by a keyway and a key drive. Multiple stirring rods (7) are installed on the outer wall of the sleeve (6). The upper partition (8) is installed on the upper outer wall of the sleeve (6). The heater (9) is installed on the upper partition (8). The distillation tube (10) is installed on the nitrification reactor (1). The input end of the distillation tube (10) is connected to the top of the nitrification chamber of the nitrification reactor (1).

2. The nitrification stirring apparatus for the production of sebacate as described in claim 1, characterized in that, The upper partition (8) is an inverted cone shape.

3. The nitrification stirring apparatus for the production of sebacate as described in claim 1, characterized in that, It also includes a flange plate (11) and a rotary joint (12). The shaft tube (5) is tubular, and the upper end of the shaft tube (5) extends above the acrylonitrile reactor (1). The flange plate (11) is installed on the upper port of the shaft tube (5), and the rotary joint (12) is installed on the flange plate (11). The rotary joint (12) is connected to the inside of the shaft tube (5).

4. The nitrification stirring apparatus for the production of sebacate as described in claim 3, characterized in that, It also includes an electromagnetic push rod (13), a cable (14) and an electric slip ring (15). The electromagnetic push rod (13) is installed at the lower end of the shaft tube (5). The piston rod of the electromagnetic push rod (13) contacts the inner wall of the sleeve (6) through the clearance hole of the shaft tube (5). The lower end of the cable (14) is electrically connected to the electromagnetic push rod (13). The upper end of the cable (14) passes through the flange plate (11) and is electrically connected to the rotating end of the electric slip ring (15). The electric slip ring (15) is installed on the acrylonitrile reactor (1) by a bracket.

5. The nitrification stirring apparatus for the production of sebacate as described in claim 3, characterized in that, It also includes a pressure relief valve (16), which is installed at the bottom of the sleeve (6). The input end of the pressure relief valve (16) is connected to the inside of the shaft tube (5) and the sleeve (6).

6. The nitrification stirring apparatus for the production of sebacate as described in claim 1, characterized in that, It also includes a lower plate (17) and a second heater (18), with the lower plate (17) installed at the lower end of the sleeve (6) and the second heater (18) installed on the lower plate (17).

7. The nitrification stirring apparatus for the production of sebacate as described in claim 1, characterized in that, It also includes a driven wheel (19), a motor (20), a driving wheel (21) and a transmission belt (22). The driven wheel (19) is concentrically mounted on the upper end of the shaft tube (5). The motor (20) is mounted on the acrylonitrile reactor (1) through a bracket. The output shaft of the motor (20) is concentrically mounted on the driving wheel (21). The transmission belt (22) is fitted on the driven wheel (19) and the driving wheel (21).

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