A reactor for the nitration of chlorobenzene

Abstract

The utility model discloses a p - nitrochlorobenzene nitration reactor, specifically relates to the technical field of nitration reactor, including the reaction kettle shell, the bottom fixedly connected with support leg of reaction kettle shell, the bottom fixedly connected with the bottom plate of support leg, the top fixedly connected with the cover of reaction kettle shell, the top of cover is provided with the feeding opening, the inside of reaction kettle shell is provided with the inner bag, the inside of inner bag is provided with the stirring rod, and the top of cover is installed the motor of drive stirring rod rotation. The utility model discloses through setting up the multilayer type shock pad of assemblable clamping structure, can effectively when the reactor use to the vibration that produces plays good shock attenuation effect, reduces the vibration influence to the placement surface, and convenient in use to the heat release of p - nitrochlorobenzene nitration reaction process carries out the circulating heat exchange cooling treatment, avoids the problem that the air pressure change caused by the big temperature difference inside and outside causes the inner bag or the reaction kettle shell to take place the bulge of the air pressure change.

Description

Technical Field

[0001] This utility model relates to the field of nitration reactor technology, and more specifically, to a p-nitrochlorobenzene nitration reactor. Background Technology

[0002] p-Nitrochlorobenzene is an important organic chemical intermediate widely used in dyes, pesticides, pharmaceuticals, and polymer materials. Its molecular structure contains one chlorine atom and one nitro group. The presence of the chlorine atom provides an active site for subsequent chemical reactions, while the introduction of the nitro group endows the molecule with specific electronic properties and reactivity. Through nitration, additional nitro groups can be introduced into the p-nitrochlorobenzene molecule to form compounds with dinitro or higher nitro content, thereby expanding its application range and performance.

[0003] The nitration reaction of p-nitrochlorobenzene is mostly carried out using a batch reactor. This type of reactor has a simple structure, flexible operation, and is suitable for small-scale production or laboratory research. However, when the p-nitrochlorobenzene nitration reaction is carried out in a traditional batch reactor, a large amount of heat is released during the reaction. The simple heat dissipation structure is insufficient to meet the requirements. The large temperature difference between the inside and outside of the reactor causes pressure changes, which can easily cause bulging of the inner liner or outer shell of the reactor. At the same time, the reactor body will vibrate during use due to the stirring design. The vibration between the reactor body and the placement surface is large, which can easily cause the placement position to shift. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a p-nitrochlorobenzene nitration reactor.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a p-nitrochlorobenzene nitration reactor, comprising a reactor shell, a support leg fixedly connected to the bottom of the reactor shell, a base plate fixedly connected to the bottom end of the support leg, a cover fixedly connected to the top of the reactor shell, a feeding port provided on the top of the cover, an inner liner provided inside the reactor shell, a stirring rod provided inside the inner liner, a motor for driving the stirring rod to rotate installed on the top of the cover, a control switch provided on the bottom outer wall of the reactor shell, a discharge pipe extending to the bottom of the reactor shell provided at the bottom of the inner liner, a shock-absorbing pad provided at the bottom of the base plate, a cavity provided between the outer wall of the inner liner and the inner wall of the reactor shell, several connecting blocks fixedly connected between the inner liner and the inner wall of the reactor shell, and a circulating water heat exchange mechanism provided between the top of the base plate and the reactor shell.

[0006] As a further improvement to the technical solution of this utility model, the shock-absorbing pad includes a first rubber pad adhered to the bottom of the base plate, a second rubber pad connected to the bottom of the first rubber pad, and a third rubber pad connected to the bottom of the second rubber pad.

[0007] As a further improvement to the technical solution of this utility model, the bottom of the first rubber pad is provided with a plurality of rectangular grooves at equal intervals along the horizontal direction, and the top inner wall of each rectangular groove is provided with a ball head insert. The top of the second rubber pad is provided with a plurality of rectangular blocks embedded in the rectangular grooves at equal intervals along the horizontal direction, and the top of each rectangular block is provided with a ball head insert groove for the ball head insert. The bottom of the second rubber pad is provided with a plurality of locking blocks at equal intervals along the horizontal direction.

[0008] As a further improvement to the technical solution of this utility model, the top of the third rubber pad is provided with a number of matching card slots for embedding the card block structure at equal intervals along the horizontal direction, and the bottom of the third rubber pad is provided with anti-slip texture.

[0009] As a further improvement to the technical solution of this utility model, the circulating water heat exchange mechanism includes an inlet pipe and an outlet pipe disposed on the outer wall of the reactor shell. The inlet pipe is connected to the top outer wall of the reactor shell and communicates with the interior of the cavity. The outlet pipe is connected to the bottom of the reactor shell and communicates with the interior of the cavity. The circulating water heat exchange mechanism also includes a water tank disposed on the top of the base plate. The top of the water tank is provided with a port, and a water pump is fixedly installed on the top of the water tank. The output end of the water pump is connected to the port of the inlet pipe.

[0010] As a further improvement to the technical solution of this utility model, the input end of the water pump is connected to a water pumping pipe, one end of which passes through the port and is inserted into the interior of the water tank, and the end of the outlet pipe is connected to a return pipe, one end of which passes through the port and is inserted into the interior of the water tank.

[0011] As a further improvement to the technical solution of this utility model, it also includes a water outlet pipe, the end of which is connected to the end of the water inlet pipe by a flange, and a sealing ring is provided at the connection. The end of the return pipe is connected to the end of the water outlet pipe by a flange, and a sealing ring is provided at the connection.

[0012] The beneficial effects of this utility model are:

[0013] 1. By setting a shock-absorbing pad at the bottom of the reactor body, the shock-absorbing pad consists of a three-layer structure of a first rubber pad, a second rubber pad, and a third rubber pad. The top of the first rubber pad is bonded to the bottom of the base plate. Then, the adjacent layers are connected by an assembly-type snap-fit ​​structure for easy replacement. The setting of the shock-absorbing pad can effectively reduce the vibration generated during the use of the reactor and reduce the impact of vibration on the placement surface.

[0014] 2. Since a large amount of heat is released during the nitration reaction of p-nitrochlorobenzene, a circulating water heat exchange mechanism is set up. A water pump is used to pump water from inside the water tank to the inside of the cavity and make it contact the outer surface of the inner liner. The water inside the cavity absorbs the heat from the surface of the inner liner and flows back to the inside of the water tank through the outlet pipe and return pipe. This facilitates the circulating heat exchange and cooling treatment of the heat released during the nitration reaction of p-nitrochlorobenzene during use, and avoids the problem of bulging of the inner liner or the outer shell of the reaction vessel caused by the pressure change due to the large temperature difference between the inside and outside. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is the front view of the present invention.

[0017] Figure 3 This is a schematic diagram of the shock-absorbing pad in this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the first rubber pad in this utility model.

[0019] Figure 5 This is a schematic diagram of the structure of the second rubber pad in this utility model.

[0020] The attached diagram is labeled as follows: 1. Base plate; 2. Shock-absorbing pad; 3. Support leg; 4. Reactor outer shell; 5. Cover; 6. Feed port; 7. Inner liner; 8. Cavity; 9. Connecting block; 10. Stirring rod; 11. Motor; 12. Water inlet pipe; 13. Water outlet pipe; 14. Discharge pipe; 15. Water tank; 16. Port; 17. Return pipe; 18. Water pump; 19. Pumping pipe; 20. Water outlet pipe; 21. Control switch; 201. First rubber pad; 202. Second rubber pad; 203. Third rubber pad; 2011. Rectangular groove; 2012. Ball head insert; 2021. Rectangular block; 2022. Ball head groove; 2023. Locking block; 2031. Locking groove; 2032. Anti-slip texture. Detailed Implementation

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

[0022] As attached Figure 1-5The p-nitrochlorobenzene nitration reactor shown includes a reactor shell 4, a support leg 3 fixedly connected to the bottom of the reactor shell 4, a base plate 1 fixedly connected to the bottom end of the support leg 3, a cover 5 fixedly connected to the top of the reactor shell 4, a feeding port 6 provided on the top of the cover 5, an inner liner 7 provided inside the reactor shell 4, a stirring rod 10 provided inside the inner liner 7, a motor 11 for driving the stirring rod 10 to rotate installed on the top of the cover 5, a control switch 21 provided on the bottom outer wall of the reactor shell 4, a discharge pipe 14 extending to the bottom of the reactor shell 4 provided at the bottom of the inner liner 7, a shock-absorbing pad 2 provided at the bottom of the base plate 1, a cavity 8 provided between the outer wall of the inner liner 7 and the inner wall of the reactor shell 4, several connecting blocks 9 fixedly connected between the inner liner 7 and the inner wall of the reactor shell 4, and a circulating water heat exchange mechanism provided between the top of the base plate 1 and the reactor shell 4.

[0023] As attached Figure 1-5 As shown, the shock-absorbing pad 2 includes a first rubber pad 201 bonded to the bottom of the base plate 1, a second rubber pad 202 connected to the bottom of the first rubber pad 201, and a third rubber pad 203 connected to the bottom of the second rubber pad 202. The bottom of the first rubber pad 201 has several rectangular grooves 2011 equidistantly arranged along the horizontal direction. Each rectangular groove 2011 has a ball-head insert 2012 on its top inner wall. The top of the second rubber pad 202 has several rectangular blocks 2021 equidistantly arranged along the horizontal direction, embedded inside the rectangular grooves 2011. The top of each block 2021 is provided with a ball head groove 2022 for the ball head insert 2012 to be inserted, and the bottom of the second rubber pad 202 is provided with several locking blocks 2023 at equal intervals along the horizontal direction. The top of the third rubber pad 203 is provided with several matching locking block 2023 structure insertion grooves 2031 at equal intervals along the horizontal direction, and the bottom of the third rubber pad 203 is provided with anti-slip texture 2032. The shock-absorbing pad 2 can effectively reduce the vibration generated during the use of the reactor and reduce the vibration impact on the placement surface.

[0024] As attached Figure 1-2As shown, the circulating water heat exchange mechanism includes an inlet pipe 12 and an outlet pipe 13 disposed on the outer wall of the reactor shell 4. The inlet pipe 12 is connected to the top outer wall of the reactor shell 4 and communicates with the interior of the cavity 8. The outlet pipe 13 is connected to the bottom of the reactor shell 4 and communicates with the interior of the cavity 8. The circulating water heat exchange mechanism also includes a water tank 15 disposed on the top of the base plate 1. The top of the water tank 15 is provided with a port 16, and a water pump 18 is fixedly installed on the top of the water tank 15. The output end of the water pump 18 is connected to the port of the inlet pipe 12, and the input end of the water pump 18 is connected to the port of the inlet pipe 12. A water pumping pipe 19 is connected, with one end of the pumping pipe 19 passing through port 16 and inserted into the water tank 15. The end of the outlet pipe 13 is connected to a return pipe 17, with one end of the return pipe 17 passing through port 16 and inserted into the water tank 15. The ends of the outlet pipe 20 and the inlet pipe 12 are connected by a flange, and a sealing ring is provided at the connection. The ends of the return pipe 17 and the outlet pipe 13 are connected by a flange, and a sealing ring is provided at the connection. The circulating water heat exchange mechanism facilitates heat exchange and cooling of the heat released during the nitration reaction of nitrochlorobenzene.

[0025] Working principle: This invention designs a p-nitrochlorobenzene nitration reactor, the specific structure of which is shown in the attached instruction manual. Figure 1-5 As shown, in this technical solution, the nitration reactor is a reaction vessel structure. During use, the raw materials to be reacted are added into the inner liner 7 of the reaction vessel through the feed port 6. Then, the stirring rod 10 is driven by the motor 11 to accelerate the reaction. A shock-absorbing pad 2 is installed at the bottom of the reaction vessel. The shock-absorbing pad 2 consists of a three-layer structure: a first rubber pad 201, a second rubber pad 202, and a third rubber pad 203. The top of the first rubber pad 201 is bonded to the bottom of the base plate 1. Adjacent layers are connected by an assembly-type snap-fit ​​structure for easy replacement. The shock-absorbing pad 2 effectively reduces vibrations generated during reactor use. This reduces the impact of vibration on the placement surface. Since a large amount of heat is released during the nitration reaction of p-nitrochlorobenzene, this application also includes a circulating water heat exchange mechanism. The water pump 18 pumps water from the inside of the water tank 16 to the inside of the cavity 8 to contact the outer surface of the inner liner 7. The water inside the cavity 8 absorbs the heat from the surface of the inner liner 7 and flows back to the inside of the water tank 15 through the outlet pipe 13 and the return pipe 17. This facilitates the circulating heat exchange and cooling of the heat released during the nitration reaction of p-nitrochlorobenzene during use, avoiding the problem of bulging of the inner liner 7 or the outer shell 4 of the reactor caused by the large temperature difference between the inside and outside.

[0026] In the accompanying drawings of the embodiments disclosed in this utility model, only the structures involved in the embodiments of this utility model are shown. Other structures can be referred to with ordinary design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0027] Finally: 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, improvements, etc., 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 p-nitrochlorobenzene nitration reactor, comprising a reactor shell (4), a support leg (3) fixedly connected to the bottom of the reactor shell (4), a bottom plate (1) fixedly connected to the bottom end of the support leg (3), a cover (5) fixedly connected to the top of the reactor shell (4), a feeding port (6) provided on the top of the cover (5), an inner liner (7) provided inside the reactor shell (4), a stirring rod (10) provided inside the inner liner (7), a motor (11) for driving the stirring rod (10) to rotate installed on the top of the cover (5), a control switch (21) provided on the bottom outer wall of the reactor shell (4), and a discharge pipe (14) extending to the bottom of the reactor shell (4) provided at the bottom of the inner liner (7), characterized in that: The bottom of the base plate (1) is provided with a shock-absorbing pad (2), and a cavity (8) is provided between the outer wall of the inner liner (7) and the inner wall of the reactor shell (4). Several connecting blocks (9) are fixedly connected between the inner liner (7) and the inner wall of the reactor shell (4). A circulating water heat exchange mechanism is provided between the top of the base plate (1) and the reactor shell (4).

2. The p-nitrochlorobenzene nitration reactor according to claim 1, characterized in that: The shock-absorbing pad (2) includes a first rubber pad (201) bonded to the bottom of the base plate (1), a second rubber pad (202) connected to the bottom of the first rubber pad (201), and a third rubber pad (203) connected to the bottom of the second rubber pad (202).

3. The p-nitrochlorobenzene nitration reactor according to claim 2, characterized in that: The bottom of the first rubber pad (201) is provided with a plurality of rectangular grooves (2011) at equal intervals along the horizontal direction. Each rectangular groove (2011) has a ball head insert (2012) on its top inner wall. The top of the second rubber pad (202) is provided with a plurality of rectangular blocks (2021) that are embedded in the rectangular grooves (2011) at equal intervals along the horizontal direction. Each rectangular block (2021) has a ball head insert groove (2022) on its top for embedding the ball head insert (2012). The bottom of the second rubber pad (202) is provided with a plurality of locking blocks (2023) at equal intervals along the horizontal direction.

4. The p-nitrochlorobenzene nitration reactor according to claim 3, characterized in that: The top of the third rubber pad (203) is provided with a plurality of matching card block (2023) structure embedded in the slot (2031) at equal intervals along the horizontal direction, and the bottom of the third rubber pad (203) is provided with anti-slip texture (2032).

5. The p-nitrochlorobenzene nitration reactor according to claim 1, characterized in that: The circulating water heat exchange mechanism includes an inlet pipe (12) and an outlet pipe (13) disposed on the outer wall of the reactor shell (4). The inlet pipe (12) is connected to the top outer wall of the reactor shell (4) and communicates with the inside of the cavity (8). The outlet pipe (13) is connected to the bottom of the reactor shell (4) and communicates with the inside of the cavity (8). The circulating water heat exchange mechanism also includes a water tank (15) disposed on the top of the base plate (1). The top of the water tank (15) is provided with a port (16), and a water pump (18) is fixedly installed on the top of the water tank (15). The output end of the water pump (18) is connected to the port of the inlet pipe (12).

6. The p-nitrochlorobenzene nitration reactor according to claim 5, characterized in that: The input end of the water pump (18) is connected to a water pump pipe (19), one end of which passes through the port (16) and is inserted into the interior of the water tank (15). The end of the outlet pipe (13) is connected to a return pipe (17), one end of which passes through the port (16) and is inserted into the interior of the water tank (15).

7. The p-nitrochlorobenzene nitration reactor according to claim 6, characterized in that: It also includes a water outlet pipe (20), which is connected to the end of the water inlet pipe (12) by a flange and a sealing ring is provided at the connection. The return pipe (17) is connected to the end of the water outlet pipe (13) by a flange and a sealing ring is provided at the connection.

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