An amination reaction device for the synthesis of benzonitrile products

Abstract

The present invention discloses an amination reaction device for the synthesis of benzonitrile products, which relates to the field of benzonitrile product production. The device includes a reaction kettle, a bracket and a motor. A bracket is fixed at the upper end of the reaction kettle, and a motor is fixed on the bracket. A driving gear and a stirring mechanism are fixed on the output shaft of the motor. The stirring mechanism includes a cylinder, which is fixed on the output shaft of the motor. The output end of the cylinder is fixed with a driving rubber wheel, and a movable block is connected to the lower end of the driving rubber wheel through a bearing. The amination reaction device for the synthesis of benzonitrile products adopts a stirring mechanism with automatic speed regulation, which can not only adjust the stirring speed of the materials according to the actual mixing requirements of different products, improve the adaptability of the device, but also reduce the stirring speed when the temperature in the reaction kettle is too high or the pressure is too large during the amination reaction of the same product, so as to reduce the reaction rate of the raw materials and ensure the normal operation of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of benzonitrile product production, and specifically to an amination reaction device for synthesizing benzonitrile products. Background Technique

[0002] Benzonitrile products are widely used in medicine, agriculture, and industry. During the production process of benzonitrile products, amination reactions are required, which are characterized by introducing amino groups into molecules. In amination reactions, amination reaction kettles are often used for the reaction. To ensure the mixing reaction of raw materials, a stirring device is needed for stirring and mixing.

[0003] In the actual use of existing amination reaction devices, the rotation speed of the stirring device is fixed, resulting in a relatively fixed mixing reaction rate of raw materials. Since the amination reaction is an exothermic reaction, in actual use, when the stirring rate is too fast, the collision frequency between molecules increases, the reaction speed accelerates, leading to an increase in temperature and pressure inside the reaction kettle, which may cause an explosion and pose certain safety hazards. When the stirring rate is too slow, it will affect the uniformity of the distribution of raw materials, thus affecting product quality and may also produce by-products or impurities. Summary of the Invention

[0004] The purpose of the present invention is to provide an amination reaction device for synthesizing benzonitrile products to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: An amination reaction device for synthesizing benzonitrile products, including a reaction kettle, a bracket, and a motor. The upper end of the reaction kettle is fixed with a bracket, and the bracket is fixed with a motor. The output shaft of the motor is fixed with a driving gear and a stirring mechanism. The stirring mechanism includes a cylinder, the cylinder is fixed on the output shaft of the motor, the output end of the cylinder is fixed with a driving rubber wheel, the lower end of the driving rubber wheel is connected to a movable block through a bearing, one end of the connecting rod is rotatably connected to the movable block, the other end of the connecting rod is rotatably connected to a connecting block, the connecting block is connected to a rotating shaft through a bearing, the rotating shaft is connected to a movable plate through a bearing, the movable plate is slidably connected in a partition, the upper end of the movable plate is fixed with a driven rubber wheel, and the driven rubber wheel is of a conical structure and is in contact with the driving rubber wheel to achieve transmission. A stirring rod is rotatably connected to the rotating shaft, and a torsion spring is connected between the stirring rod and the rotating shaft. Gravity balls are fixed on the stirring rod.

[0006] Preferably, a feed pipe is installed on the reactor, and the lower end of the feed pipe penetrates through the partition plate which is fixed inside the reactor. Meanwhile, a discharge valve port is installed at the lower end of the reactor. A thermometer and a pressure gauge are also installed on the reactor to monitor the temperature and pressure inside the reactor. Through the functions of the feed pipe and the discharge valve port, the inlet and outlet of materials can be facilitated, thus providing a basic guarantee for the normal operation of the device.

[0007] Preferably, a protective sleeve is installed outside the reactor, and a water outlet is installed at the lower end of the protective sleeve. A spraying mechanism is installed on the protective sleeve, and a water cooling mechanism is also installed on the protective sleeve. Through the protective sleeve, the water sprayed by the spraying pipe of the spraying mechanism can be protected to avoid water splashing outside. Coupled with the function of the water outlet, it can provide a basic guarantee for the recovery of cooling water.

[0008] Preferably, the spraying mechanism includes a rotating rod, a driven gear, a driving gear, a toothed ring, a water guide pipe, a water distribution ring and a spray head. The rotating rod is connected to the bracket by bearings, and one end of the rotating rod is fixed to the driven gear, and the driven gear meshes with the driving gear for transmission. Through the transmission between the driving gear and the driven gear, a basic driving force can be provided for the rotation of the rotating rod.

[0009] Preferably, the other end of the rotating rod is fixed to the driving gear, and the driving gear is engaged with the toothed ring for transmission. When the rotating rod rotates, with the transmission between the driving gear and the toothed ring, a basic driving force can be provided for the up-and-down reciprocating movement of the toothed ring.

[0010] Preferably, the lower end of the toothed ring is fixed with a water guide pipe, and the water guide pipe is slidably connected to the protective sleeve, and a water pipe joint is provided on the water guide pipe. When the toothed ring moves, with the sliding guiding function between the water guide pipe and the protective sleeve, the stability of the movement of the toothed ring can be ensured.

[0011] Preferably, the lower end of the water guide pipe is fixed to the water distribution ring, and the spray heads are fixed at equal angles on the water distribution ring, and the spray heads are arranged on the side of the reactor. Through the functions of the water distribution ring and the spray heads, the spraying of cooling water can be realized, thus providing a basic guarantee for cooling the reactor.

[0012] Preferably, the water cooling mechanism includes a water storage ring, an installation ring, a vertical rod, a sealing plug, a cross rod, a guiding rod and a spring. The water storage rings are fixed on the outside of the reactor at equal intervals, and the cross section of the water storage ring is an arc-shaped structure. Through the function of the water storage ring, the storage of cooling water can be realized, so as to ensure the contact time between the cooling water and the reactor, and further ensure the water cooling effect of the reactor.

[0013] Preferably, the mounting ring is arranged inside the protective sleeve. Vertical rods are fixedly arranged at equal angles on the lower end surface of the mounting ring, and sealing plugs are fixedly arranged at equal intervals on the vertical rods. At the same time, the sealing plugs are matched with the openings on the water storage ring to achieve sealing. Through the cooperation and separation of the sealing plugs and the openings on the water storage ring, the release of the cooling water in the water storage ring can be realized, thus providing a basic guarantee for the replacement of the cooling water in the water storage ring.

[0014] Preferably, cross rods are fixedly arranged at equal angles on the side of the mounting ring. The cross rods are located above the water distribution ring, and guide rods are fixedly arranged on the cross rods. At the same time, the guide rods are slidably connected with the protective sleeve. A spring is fixedly arranged between the cross rods and the protective sleeve. By the action force generated when the water distribution ring contacts the cross rods, a basic acting force can be provided for the movement of the mounting ring, the vertical rods and the sealing plugs, thus providing a basic guarantee for the release of the cooling water in the water storage ring. With the elastic action of the spring, a basic guarantee can be provided for the automatic reset of the mounting ring, the vertical rods and the sealing plugs.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. For the amination reaction device for synthesizing benzonitrile products, a stirrer mechanism with automatic speed regulation is adopted. It can not only adjust the stirring speed of the materials according to the actual production and mixing requirements of different products, improve the adaptability of the device, but also, during the amination reaction process of the same product, when the temperature in the reaction kettle is too high or the pressure is too large, by reducing the stirring speed, the reaction rate of the raw materials can be reduced to ensure the normal operation of the device. When adjusting the stirring speed of the stirring rod, with the cooperation of the connecting rod and the movable plate, the position of the stirring rod can be adjusted synchronously. Thus, no matter what the rotation speed and the unfolding angle of the stirring rod are, the stirring rod can always ensure sufficient stirring of the materials on the inner and outer circumferences of the reaction kettle.

[0017] 2. For the amination reaction device for synthesizing benzonitrile products, a spray type water cooling mechanism is adopted to replace the traditional spiral pipeline water cooling mechanism, which can better realize the water cooling and heat exchange function of the reaction kettle. And by the up and down movement of the spray head, the water cooling area can be increased to ensure the water cooling effect. With the cooperation of the water storage ring, the cooling water can be stored, increasing the contact time between the cooling water and the reaction kettle, further ensuring the water cooling and heat exchange effect. With the cooperation of the linked sealing mechanism, the release of the cooling water in the water storage ring can be realized, facilitating the replacement of the cooling water in the water storage ring and ensuring the water cooling effect of the device. Description of the Drawings

[0018] Figure 1 It is a front view three-dimensional structure diagram of the whole device of the present invention;

[0019] Figure 2 It is a front view sectional three-dimensional structure diagram of the whole device of the present invention;

[0020] Figure 3This is the front three-dimensional structure schematic diagram of the stirring mechanism of the present invention;

[0021] Figure 4 This is the bottom three-dimensional structure schematic diagram of the stirring mechanism of the present invention;

[0022] Figure 5 This is the three-dimensional structure schematic diagram of the spraying mechanism of the present invention;

[0023] Figure 6 This is the three-dimensional structure schematic diagram of the water-cooling mechanism of the present invention;

[0024] Figure 7 This is the present invention Figure 6 The enlarged structure schematic diagram at position A in the present invention.

[0025] In the figure: 1, reaction kettle; 101, feed pipe; 102, partition board; 103, discharge valve port; 2, protective sleeve; 201, water outlet; 3, support; 4, motor; 5, driving gear; 6, stirring mechanism; 601, cylinder; 602, driving rubber wheel; 603, movable block; 604, connecting rod; 605, connecting block; 606, rotating shaft; 607, movable plate; 608, driven rubber wheel; 609, stirring rod; 610, gravity ball; 7, spraying mechanism; 701, rotating rod; 702, driven gear; 703, driving gear; 704, toothed ring; 705, water guide pipe; 706, water distribution ring; 707, spray head; 8, water-cooling mechanism; 801, water storage ring; 802, mounting ring; 803, vertical rod; 804, sealing plug; 805, cross bar; 806, guide rod; 807, spring. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-7, the present invention provides a technical solution: an amination reaction device for synthesizing benzonitrile products, including a reaction kettle 1, a bracket 3 and a motor 4. A bracket 3 is fixed at the upper end of the reaction kettle 1, and a motor 4 is fixed on the bracket 3. A driving gear 5 and a stirring mechanism 6 are fixed on the output shaft of the motor 4. The stirring mechanism 6 includes a cylinder 601, which is fixed on the output shaft of the motor 4. The output end of the cylinder 601 is fixed with a driving rubber wheel 602. The lower end of the driving rubber wheel 602 is connected to a movable block 603 by a bearing. One end of the movable block 603 is rotatably connected to one end of a connecting rod 604, and the other end of the connecting rod 604 is rotatably connected to a connecting block 605. The connecting block 605 is connected to a rotating shaft 606 by a bearing. The rotating shaft 606 is connected to a movable plate 607 by a bearing. The movable plate 607 is slidably connected in a partition plate 102. A driven rubber wheel 608 is fixed at the upper end of the movable plate 607, and the driven rubber wheel 608 is of a conical structure, and the driven rubber wheel 608 is in contact with the driving rubber wheel 602 to achieve transmission. A stirring rod 609 is rotatably connected to the rotating shaft 606, and a torsion spring is connected between the stirring rod 609 and the rotating shaft 606. A gravity ball 610 is fixed on the stirring rod 609.

[0028] A feed pipe 101 is installed on the reaction kettle 1, and the lower end of the feed pipe 101 penetrates through the partition plate 102, and the partition plate 102 is fixed inside the reaction kettle 1. At the same time, a discharge valve port 103 is installed at the lower end of the reaction kettle 1. A thermometer and a pressure gauge are also installed on the reaction kettle 1 to monitor the temperature and pressure inside the reaction kettle 1;

[0029] When using the amination reaction device for synthesizing benzonitrile products, such as Figures 1-4As shown in the figure, the raw materials to be reacted are injected into the reaction kettle 1 through the feed pipe 101. At this time, the discharge valve port 103 is in a closed state. Then, the motor 4 is started synchronously. The motor 4 can drive the cylinder 601 and the driving rubber wheel 602 to rotate. With the frictional transmission between the driving rubber wheel 602 and the driven rubber wheel 608, the rotating shaft 606 can be rotated, thereby driving the stirring rod 609 to rotate. With the rotational centrifugal action of the gravity ball 610, the stirring rod 609 is unfolded at a certain angle. The stirring of the raw materials can be realized through the stirring rod 609, which is convenient for the amination reaction of the raw materials. During the actual use of the device, when it is necessary to adjust the rotation speed of the stirring rod 609, only the cylinder 601 needs to be controlled to expand and contract, thereby driving the driving rubber wheel 602 to move. Taking the expansion of the cylinder 601 as an example, when the cylinder 601 expands and drives the driving rubber wheel 602 to move downward, the movable block 603 is synchronously driven to move downward. With the transmission of the connecting rod 604, the connecting block 605 and the rotating shaft 606 move, so that the driven rubber wheel 608 moves synchronously, and the driven rubber wheel 608 and the driving rubber wheel 602 always remain in contact. At this time, the diameter of the contact position between the driving rubber wheel 602 and the driven rubber wheel 608 increases, so that the rotation speed of the driven rubber wheel 608 and the rotating shaft 606 decreases, thereby reducing the stirring speed of the stirring rod 609 for the raw materials. And because the rotation speed of the rotating shaft 606 decreases, the centrifugal force received by the gravity ball 610 at this time decreases. With the action of the torsion spring, the inclination angle of the stirring rod 609 decreases, further reducing the stirring range of the stirring rod 609, thereby effectively reducing the mixing rate of the raw materials. On the contrary, when the cylinder 601 contracts, the rotation speed of the rotating shaft 606 increases and the centrifugal force received by the gravity ball 610 increases, so that the inclination angle of the stirring rod 609 increases under the centrifugal action of the gravity ball 610, thereby increasing the stirring area of the stirring rod 609 for the raw materials, and then increasing the mixing rate of the raw materials;

[0030] A protective sleeve 2 is installed outside the reactor 1, and a water outlet 201 is installed at the lower end of the protective sleeve 2. A spraying mechanism 7 is installed on the protective sleeve 2, and a water cooling mechanism 8 is also installed on the protective sleeve 2. The spraying mechanism 7 includes a rotating rod 701, a driven gear 702, a driving gear 703, a toothed ring 704, a water guide pipe 705, a water distribution ring 706 and a spray head 707. The rotating rod 701 is connected to the bracket 3 by a bearing, and one end of the rotating rod 701 is fixed to the driven gear 702, and the driven gear 702 is meshed and driven with the driving gear 5. The other end of the rotating rod 701 is fixed to the driving gear 703, and the driving gear 703 is engaged with the toothed ring 704 to realize transmission. The lower end of the toothed ring 704 is fixed with a water guide pipe 705, and the water guide pipe 705 is slidably connected to the protective sleeve 2, and a water pipe joint is provided on the water guide pipe 705. The lower end of the water guide pipe 705 is fixed to the water distribution ring 706, and the spray heads 707 are fixed at equal angles on the water distribution ring 706, and the spray heads 707 are arranged on the side of the reactor 1. The water cooling mechanism 8 includes a water storage ring 801, a mounting ring 802, a vertical rod 803, a sealing plug 804, a cross rod 805, a guide rod 806 and a spring 807. The water storage rings 801 are fixed at equal intervals outside the reactor 1, and the cross section of the water storage ring 801 is an arc structure. The mounting ring 802 is arranged inside the protective sleeve 2, and vertical rods 803 are fixed at equal angles on the lower end surface of the mounting ring 802, and sealing plugs 804 are fixed at equal intervals on the vertical rods 803, and the sealing plugs 804 are matched with the openings on the water storage ring 801 to realize sealing. Cross rods 805 are fixed at equal angles on the side of the mounting ring 802, and the cross rods 805 are located above the water distribution ring 706, and guide rods 806 are fixed on the cross rods 805, and the guide rods 806 are slidably connected to the protective sleeve 2, and springs 807 are fixed between the cross rods 805 and the protective sleeve 2;

[0031] During the operation of the device, such as Figures 1-7As shown in the figure, since the amination reaction of the raw materials in the reaction kettle 1 is an exothermic reaction, cooling is required. At this time, the cooling water delivery pipe is connected to the water inlet joint of the water guide pipe 705, and water is sent into the water guide pipe 705 through a water pump. The water outlet 201 is connected to the cooling water tank through a conduit to realize the recycling of cooling water. Through the guiding action of the water guide pipe 705 and the water distribution ring 706, the cooling water enters the spray head 707 and sprays outwards. The sprayed cooling water contacts the outer wall of the reaction kettle 1, thereby realizing the primary water cooling and heat dissipation effect of the reaction kettle 1. With the cooperation of the protective sleeve 2, it can effectively prevent the water mist from splashing outwards. When the motor 4 starts, it synchronously drives the driving gear 5 to rotate. With the transmission between the driving gear 5 and the driven gear 702 and the transmission between the transmission gear 703 and the toothed ring 704, the water guide pipe 705, the water distribution ring 706 and the spray head 707 can move up and down orderly, thereby increasing the contact area between the cooling water and the outer wall of the reaction kettle 1 and further ensuring the water cooling effect of the outer wall of the reaction kettle 1. After the water sprayed by the spray head 707 contacts the outer wall of the reaction kettle 1, part of the cooling water is received and stored by the water storage ring 801. By contacting the outer wall of the reaction kettle 1 with the cooling water stored in the water storage ring 801, the contact time between the cooling water and the outer wall of the reaction kettle 1 can be increased, and the heat exchange effect of the cooling water can be improved. During the up and down movement of the water distribution ring 706, when the water distribution ring 706 moves up to contact the cross bar 805, at this time, the cross bar 805 is stressed and moves up with the water distribution ring 706, thereby driving the mounting ring 802, the vertical rod 803 and the sealing plug 804 to move up. With the sliding guiding action between the guiding rod 806 and the protective sleeve 2, the stability of the upward movement of the mounting ring 802, the vertical rod 803 and the sealing plug 804 can be ensured. At this time, the spring 807 is stressed and contracts. When the sealing plug 804 moves up to separate from the opening on the water storage ring 801, the cooling water stored in the water storage ring 801 is discharged into the protective sleeve 2 through the opening on the water storage ring 801 and flows back into the cooling water tank through the water outlet 201 and the conduit. When the water distribution ring 706 moves down and separates from the cross bar 805, at this time, under the action of the spring 807, the sealing plug 804 is matched with the opening on the water storage ring 801 to realize sealing. At this time, the cooling water sprayed by the spray head 707 enters the water storage ring 801 again for storage to realize heat exchange, thereby realizing the automatic replacement of the cooling water in the water storage ring 801 and effectively ensuring the heat dissipation effect of the device. This is the working principle of the amination reaction device for the synthesis of benzonitrile products.

[0032] It should be noted that in this article, the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0033] In this text, specific examples are used to elaborate on the principles and implementation modes of the present invention. The description of the above examples is only for helping to understand the method and its core idea of the present invention. The above is only the preferred implementation mode of the present invention. It should be noted that due to the limited nature of literal expression and objectively infinite specific structures, for those of ordinary skill in the art, without departing from the principles of the present invention, several improvements, embellishments or changes can be made, or the above technical features can be combined in an appropriate manner; these improvements, embellishments, changes or combinations, or directly applying the concept and technical solution of the invention to other occasions without improvement, shall all be regarded as the protection scope of the present invention.

Claims

1. An amination reaction device for synthesizing benzonitrile products, comprising a reaction kettle (1), a bracket (3), a motor (4), a spraying mechanism (7) and a water cooling mechanism (8). A protective sleeve (2) is installed outside the reaction kettle (1), and a spraying mechanism (7) is installed on the protective sleeve (2). At the same time, a water cooling mechanism (8) is also installed on the protective sleeve (2). A bracket (3) is fixed at the upper end of the reaction kettle (1), and a motor (4) is fixed on the bracket (3). It is characterized in that: A driving gear (5) and a stirring mechanism (6) are fixed on the output shaft of the motor (4). The stirring mechanism (6) includes a cylinder (601). The cylinder (601) is fixed on the output shaft of the motor (4). A driving rubber wheel (602) is fixed at the output end of the cylinder (601). A movable block (603) is connected to the lower end of the driving rubber wheel (602) by a bearing. One end of a connecting rod (604) is rotatably connected to the movable block (603), and the other end of the connecting rod (604) is rotatably connected to a connecting block (605). The connecting block (605) is connected to a rotating shaft (606) by a bearing. The rotating shaft (606) is connected to a movable plate (607) by a bearing. The movable plate (607) is slidably connected in a partition plate (102). The partition plate (102) is fixed in a reaction kettle (1). A driven rubber wheel (608) is fixed at the upper end of the movable plate (607). The driven rubber wheel (608) is of a conical structure and is in contact with the driving rubber wheel (602) to achieve transmission. A stirring rod (609) is rotatably connected to the rotating shaft (606), and a torsion spring is connected between the stirring rod (609) and the rotating shaft (606). A gravity ball (610) is fixed on the stirring rod (609). The water cooling mechanism (8) includes a water storage ring (801). The water storage rings (801) are fixed on the outer side of the reaction kettle (1) at equal intervals. The cross section of the water storage ring (801) is of an arc structure. An installation ring (802) is arranged in a protective sleeve (2). Vertical rods (803) are fixed on the lower end surface of the installation ring (802) at equal angles. Sealing plugs (804) are fixed on the vertical rods (803) at equal intervals. The sealing plugs (804) are matched with the openings on the water storage ring (801) to achieve sealing. The spraying mechanism (7) includes a rotating rod (701), a driven gear (702), a driving gear (703), a toothed ring (704), a water guide pipe (705), a water distribution ring (706) and a spray head (707). The rotating rod (701) is connected to a bracket (3) by a bearing. One end of the rotating rod (701) is fixed to the driven gear (702), and the driven gear (702) is meshed with the driving gear (5) for transmission. The other end of the rotating rod (701) is fixed to the driving gear (703), and the driving gear (703) is engaged with the toothed ring (704) to achieve transmission. The toothed ring (704) is fixed to the lower end of the water guide pipe (705). The water guide pipe (705) is slidably connected to the protective sleeve (2), and a water pipe joint is arranged on the water guide pipe (705). The lower end of the water guide pipe (705) is fixed to the water distribution ring (706). The spray heads (707) are fixed on the water distribution ring (706) at equal angles, and the spray heads (707) are arranged on the side of the reaction kettle (1).

2. The amination reaction device for synthesizing benzonitrile products according to claim 1, wherein: A feed pipe (101) is installed on the reactor (1), and the lower end of the feed pipe (101) penetrates through the partition plate (102). At the same time, a discharge valve port (103) is installed at the lower end of the reactor (1). A thermometer and a pressure gauge are also installed on the reactor (1) to monitor the temperature and pressure inside the reactor (1).

3. The amination reaction device for synthesizing benzonitrile products according to claim 1, wherein: A water outlet (201) is installed at the lower end of the protective sleeve (2).

4. The amination reaction device for synthesizing benzonitrile products according to claim 3, characterized in that: Cross bars (805) are fixedly arranged at equal angles on the side of the mounting ring (802). The cross bars (805) are located above the water distribution ring (706). Guide rods (806) are fixed on the cross bars (805). At the same time, the guide rods (806) are slidably connected to the protective sleeve (2). A spring (807) is fixed between the cross bars (805) and the protective sleeve (2).

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