Reaction kettle for hydrogenation reaction of benzofuranone

Abstract

The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for benzofuranone hydrogenation reaction, which comprises a kettle body and a hopper mounted at the top of the kettle body and communicated with an inner cavity of the kettle body, a scraper rotatably scrapes the inner wall of the reaction kettle, reaction solution residues are reduced, normal reaction can be ensured, and air discharged through an exhaust hole can be recycled. A fan is arranged to supply air to a plurality of stirring paddles on one hand and supply air to a spray head mounted at a feeding opening of a hopper on the other hand, so that air in the reaction kettle is prevented from escaping from the hopper, and the accuracy of detecting the condition of discharged air is improved; meanwhile, the materials are accelerated to enter the reaction kettle from the hopper, so that the solid raw materials are prevented from remaining at the material inlet of the hopper, the accurate and reliable formula proportion of each substance participating in the reaction is ensured, the gas generated by the reaction is prevented from being gathered and remaining in the reaction kettle, and the accuracy of the detection result of the gas discharged by the gas outlet pipe is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reactors, in particular to a reactor for benzofuranone hydrogenation reaction. Background Art

[0002] The benzofuranone hydrogenation reaction is usually completed in a reactor, and a stirring component is added to the reactor to stir the flow of the reaction solution and increase the mixing frequency to improve the reaction efficiency.

[0003] The Chinese utility model patent with the authorization announcement number of "CN213314994U" is specifically a "reactor for the synthesis of disperse red of asymmetric benzodifuranone compound 356". It stirs the reaction materials to ensure the reaction effect, and can be exhausted intermittently while stirring. The degree of reaction can be roughly judged by observing the exhaust of the exhaust gas. It is very convenient to use and can ensure the reaction effect and efficiency;

[0004] The above device has the following two problems. First, the stirring paddle fails to contact the inner wall of the reactor during rotation, and some viscous reaction solution is easy to remain on the inner wall of the reactor, resulting in a dead corner of stirring, which is easy to form residual substances and affect the normal progress of the reaction. Second, the stirring and mixing method of the stirring paddle is too single. The raw materials participating in the reaction rotate synchronously, the relative motion amplitude is small, and the mixing and stirring effect is poor. In addition, all the raw materials participating in the reaction enter the reactor from the feed port, and the solid raw materials are easy to remain at the feed port, causing the proportion of the raw materials participating in the reaction to change, affecting the normal progress of the reaction. In addition, the gas generated in the reaction will also escape from the feed port and cannot be concentrated and discharged from the outlet pipe, which reduces the accuracy of detecting the gas discharge situation through the outlet pipe. At the same time, the gas generated in the reaction will not be much, and it is very likely to gather in the reactor instead of being discharged from the outlet pipe, making it difficult to detect the accurate gas situation through the outlet pipe. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the prior art, the utility model provides a reaction kettle for benzofuranone hydrogenation reaction, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0007] The utility model provides a reaction kettle for the hydrogenation reaction of benzofuranone, which comprises a kettle body and a hopper installed at the top of the kettle body and communicated with the inner cavity of the kettle body. The stirring assembly comprises a stirring tube rotatably installed in the kettle body. A plurality of stirring paddles communicated with the inner cavity of the stirring tube are installed on the outer wall of the stirring tube. Exhaust holes are formed through the end parts of the stirring paddles far away from the stirring tube and penetrate through the inner cavity of the stirring paddles. Meanwhile, scraping blades in contact with the inner wall of the kettle body are also installed. The air inlet assembly comprises a fan installed on the outer wall of the kettle body. One output end of the fan is communicated with a connecting ring sleeved on the outer wall of the stirring tube and communicated with the stirring tube. The other output end of the fan is communicated with a spray head arranged at the feed inlet of the hopper.

[0008] Furthermore, an exhaust pipe communicated with the inner cavity of the kettle body is installed at the top of the kettle body, and a plurality of supporting legs with the same height are installed at the bottom of the kettle body.

[0009] Furthermore, a discharge pipe communicated with the inner cavity of the kettle body is installed at the bottom of the kettle body, and a valve is installed in the discharge pipe.

[0010] Furthermore, the stirring assembly further comprises a stirring motor fixedly installed at the top of the kettle body and with an output end extending into the kettle body and fixedly connected with the top of the stirring tube. Two limiting retaining rings are fixedly sleeved on the outer wall of the stirring tube. A plurality of first air inlet holes are formed through the outer wall of the stirring tube between the two limiting retaining rings and penetrate through the inner cavity of the stirring tube.

[0011] Furthermore, one output end of the fan is communicated with a first air inlet pipe extending into the inner cavity of the kettle body and communicated with the connecting ring. The connecting ring is arranged between the two limiting retaining rings, and second air inlet holes communicated with the plurality of first air inlet holes are formed through the inner wall of the inner ring of the connecting ring and penetrate through the inner cavity.

[0012] Furthermore, the air inlet assembly further comprises a mounting plate fixedly installed at the upper cavity opening of the hopper. A second air inlet pipe is communicated between the other output end of the fan penetrating through the mounting plate and the spray head. The spray head is installed at the bottom of the mounting plate.

[0013] The technical solution provided by the utility model has the following beneficial effects compared with the known prior art:

[0014] 1. Scraping blades in contact with the inner wall of the reaction kettle are installed at the ends of the stirring paddles participating in the stirring of the reaction solution in the reaction kettle. During the process of the stirring paddles rotating to stir the reaction solution, the scraping blades rotate and scrape the inner wall of the reaction kettle, reducing the residue of the reaction solution, not easily having stirring dead angles, ensuring the normal progress of the reaction. Meanwhile, exhaust holes are formed at the ends of each stirring paddle close to the inner wall of the reaction kettle. The air discharged through the exhaust holes will form liquid bubbles gradually floating upward in the reaction solution, thereby increasing the relative flow of the reaction solution and improving the mixing and stirring effect;

[0015] 2. The blower is arranged to supply air to a number of stirring paddles on one hand and to a spray head installed at the feeding opening of the hopper on the other hand, so as to prevent the air in the reaction kettle from escaping from the hopper, improve the accuracy of detecting the discharged gas, and at the same time accelerate the feeding of materials from the hopper into the reaction kettle, avoid the solid raw materials remaining at the feeding opening of the hopper, and thus ensure the accurate and reliable formula ratio of each substance participating in the reaction and ensure the normal progress of the reaction.

[0016] 3. The pressure inside the reaction kettle will gradually increase with the continuous air intake of the blower, so as to uniformly discharge the gas inside the reaction kettle from the exhaust pipe at a high speed, prevent the gas generated by the reaction from accumulating and remaining inside the reaction kettle, and further improve the accuracy of the detection result of the gas discharged from the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the internal structure of the kettle body of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the stirring assembly of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the air intake assembly of the present invention.

[0022] The reference numerals in the drawings respectively represent: 1. Kettle body; 11. Hopper; 12. Exhaust pipe; 13. Discharge pipe; 14. Valve; 15. Support leg; 21. Stirring motor; 22. Stirring pipe; 23. Stirring paddle; 24. Scraping blade; 25. Exhaust hole; 26. Limit retaining ring; 3. Blower; 31. First air inlet pipe; 32. Connecting ring; 33. Second air inlet pipe; 34. Spray head; 35. Mounting plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] The present utility model will be further described below with reference to the embodiments.

[0025] Embodiment 1

[0026] Refer to Figures 1-4 , which is the first embodiment of the present utility model, discloses a reaction kettle for benzofuranone hydrogenation reaction, including a kettle body 1 and a hopper 11 installed on the top of the kettle body 1 and communicating with the inner cavity of the kettle body 1. The stirring assembly includes a stirring tube 22 rotatably installed in the kettle body 1. A plurality of stirring paddles 23 communicating with the inner cavity of the stirring tube 22 are installed on the outer wall of the stirring tube 22. Exhaust holes 25 are formed at one ends of the stirring paddles 23 away from the stirring tube 22 and penetrate through the inner cavity of the stirring paddles 23. A certain gap is reserved between the exhaust holes 25 and the inner wall of the kettle body 1 to ensure that air can be discharged smoothly. At the same time, a scraping blade 24 in contact with the inner cavity wall of the kettle body 1 is also installed. Both sides of the scraping blade 24 can be used, so it can adapt to the forward and reverse start of the stirring motor 21. The air inlet assembly includes a fan 3 installed on the outer wall of the kettle body 1. One output end of the fan 3 is communicated with a connecting ring 32 sleeved on the outer wall of the stirring tube 22 and communicating with the stirring tube 22. Part of the air generated by the fan 3 enters the connecting ring 32, enters the stirring tube 22 through the connecting ring 32, then enters the stirring paddles 23, and finally is discharged from the exhaust holes 25 at the ends of the stirring paddles 23. The other output end of the fan 3 is communicated with a spray head 34 arranged at the feed inlet of the hopper 11.

[0027] Embodiment 2

[0028] Refer to Figures 1-4, which is the second embodiment of the present utility model. The difference between this embodiment and the first embodiment is that: an exhaust pipe 12 communicating with the inner cavity of the kettle body 1 is further installed at the top of the kettle body 1, several support legs 15 with the same height are installed at the bottom of the kettle body 1, a discharge pipe 13 communicating with the inner cavity of the kettle body 1 is installed at the bottom of the kettle body 1, and a valve 14 is installed in the discharge pipe 13 to facilitate the discharge of the reaction solution. The stirring assembly further includes a stirring motor 21 fixedly installed at the top of the kettle body 1 and with its output end extending into the kettle body 1 and fixedly connected to the top of the stirring pipe 22. Two limiting retaining rings 26 are fixedly sleeved on the outer pipe wall of the stirring pipe 22, and the distance between the two limiting retaining rings 26 is the same as the thickness of the connecting ring 32. A plurality of annularly distributed first air inlets are formed through the inner cavity of the stirring pipe 22 on the outer pipe wall of the stirring pipe 22 between the two limiting retaining rings 26. One output end of the air blower 3 is communicated with a first air inlet pipe 31 extending into the inner cavity of the kettle body 1 and communicating with the connecting ring 32. The first air inlet pipe 31 is made of a rigid material and can support and fix the connecting ring 32. The connecting ring 32 is arranged between the two limiting retaining rings 26, and a plurality of second air inlets annularly distributed and communicating with the first air inlets are formed through the inner cavity of the inner ring wall of the connecting ring 32. Therefore, no matter how the stirring pipe 22 rotates, it can always maintain a communication state with the stationary connecting ring 32 through some of the first air inlets and the second air inlets. The air inlet assembly further includes a mounting plate 35 fixedly installed at the upper cavity opening of the hopper 11. Each raw material participating in the reaction is added from the annular gap between the mounting plate 35 and the feeding port of the hopper 11. The other output end of the air blower 3 is communicated with a second air inlet pipe 33 between the mounting plate 35 and the spray head 34, and the spray head 34 is installed at the bottom of the mounting plate 35.

[0029] The rest of the structure is the same as that of Embodiment 1.

[0030] The working process of the present utility model is as follows:

[0031] First, close the valve 14 and start the air blower 3. A part of the air flow is discharged to the spray head 34 through the second air inlet pipe 33. At this time, add the reaction raw materials into the kettle body 1 from the hopper 11, which can improve the feeding efficiency of the reaction raw materials, reduce the reaction raw materials remaining at the feeding port of the hopper 11, and at the same time, since the spray head 34 continuously feeds air into the hopper 11, it can prevent the gas generated during the reaction in the kettle body 1 from being discharged from the hopper 11.

[0032] Secondly, start the stirring motor 21 to drive the stirring pipe 22 to rotate, and then drive a plurality of stirring paddles 23 to stir and mix the reaction raw materials in the kettle body 1. The scraping blades 24 installed at the ends of the stirring paddles 23 will also rotate synchronously to scrape off the sticky raw materials adhering to the inner wall of the kettle body 1.

[0033] Finally, another part of the air flow of the fan 3 is discharged into the connecting ring 32 through the first intake pipe 31. Through a number of second intake holes and the first intake hole, air can always be blown into the stirring pipe 22 during the rotation of the stirring pipe 22, so that the exhaust holes 25 at the end of the stirring paddle 23 can discharge air for a long time, and liquid bubbles that gradually float upward will be formed in the reaction solution, thereby increasing the relative flow of the reaction solution, increasing the relative movement between the various raw materials participating in the reaction, and improving the mixing and stirring effect.

[0034] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A reactor for benzofuranone hydrogenation reaction, comprising a reactor body (1) and a hopper (11) installed on the top of the reactor body (1) and connected to the inner cavity of the reactor body (1), characterized in that: Also includes: A stirring assembly comprises a stirring tube (22) rotatably mounted in a kettle body (1); a plurality of stirring paddles (23) connected to the inner cavity of the stirring tube (22) are mounted on the outer tube wall of the stirring tube (22); exhaust holes (25) are provided at the ends of the stirring paddles (23) away from the stirring tube (22) and penetrate the inner cavity of the stirring paddles (23); and a scraper (24) in contact with the inner cavity wall of the kettle body (1) is also mounted; An air intake assembly comprises a fan (3) mounted on the outer wall of a kettle body (1), one output end of the fan (3) being connected to a connecting ring (32) which is sleeved on the outer wall of a stirring tube (22) and connected to the stirring tube (22), and the other output end of the fan (3) being connected to a nozzle (34) arranged at a feeding port of a hopper (11).

2. A reaction kettle for benzofuranone hydrogenation according to claim 1, characterized in that: An exhaust pipe (12) connected to the inner cavity of the kettle (1) is also installed on the top of the kettle body (1), and a plurality of highly flush supporting legs (15) are installed on the bottom of the kettle body (1).

3. A reaction kettle for benzofuranone hydrogenation according to claim 1, characterized in that: A discharge pipe (13) communicating with the inner cavity of the kettle (1) is installed at the bottom of the kettle body (1), and a valve (14) is installed in the discharge pipe (13).

4. A reaction kettle for benzofuranone hydrogenation according to claim 1, characterized in that: The stirring assembly further comprises a stirring motor (21) fixedly mounted on the top of the kettle body (1) and having an output end extending into the kettle body (1) and fixedly connected to the top of a stirring tube (22); two limit retaining rings (26) are fixedly sleeved on the outer tube wall of the stirring tube (22); and a plurality of first air inlet holes are formed on the outer tube wall of the stirring tube (22) between the two limit retaining rings (26) and penetrating through the inner cavity of the stirring tube (22).

5. A reaction kettle for benzofuranone hydrogenation according to claim 4, characterized in that: One of the output ends of the fan (3) is connected to a first air inlet pipe (31) extending into the inner cavity of the kettle body (1) and connected to a connecting ring (32); the connecting ring (32) is arranged between two limit stop rings (26); and the inner ring wall of the connecting ring (32) penetrates the inner cavity to form a second air inlet hole connected to a plurality of first air inlet holes.

6. A reaction kettle for benzofuranone hydrogenation according to claim 1, characterized in that: The air intake assembly also includes a mounting plate (35) fixedly mounted at the upper cavity opening of the hopper (11); the other output end of the fan (3) passes through the mounting plate (35) and is connected to a second air intake pipe (33) between the nozzle (34); and the nozzle (34) is mounted at the bottom of the mounting plate (35).

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