Reaction kettle with distributed feeding ports

Abstract

The utility model relates to the technical field of chemical equipment, and particularly discloses a reaction kettle with a distributed feeding port, which comprises a reaction kettle, a discharge port is fixed at the bottom end of the reaction kettle, a feeding pipe is fixed at the top end of the reaction kettle in a penetrating manner, the top end of the feeding pipe is fixedly connected with a head tank, and the bottom end of the feeding pipe is fixedly connected with the distributed feeding port. The distributed feeding port comprises an upper straight pipe, a middle accelerating pipe and a bottom distributing head, the pipe diameter of the accelerating pipe is smaller than that of the straight pipe and that of the distributing head, a plurality of first open holes are formed in the outer wall of the distributing head at intervals, the bottom end of the distributed feeding port protrudes upwards to form a conical bottom, and a plurality of second open holes are formed in the outer wall of the conical bottom at intervals. According to the reaction kettle, the reaction speed of materials in the reaction kettle is more balanced, local overheating caused by high-concentration violent reaction is reduced, the selectivity of the reaction is improved, side reactions are reduced, and the temperature in the reaction kettle in the feeding process is more consistent, so that the temperature fluctuation in the feeding process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical equipment, and specifically discloses a reaction kettle provided with distributed feeding ports. Background Art

[0002] In the process of feeding in the production of organic peroxides, the required amount of reaction materials is usually introduced into the high-level tank, and then fed in sequence. The feeding process needs to control the temperature in the kettle to avoid the temperature rising too quickly and causing temperature rise. Generally, the flow of materials is controlled by controlling the opening of the valve to control the temperature in the reactor. At present, a straight open pipe is generally used for feeding in the production process. The material dispersion effect is relatively poor. After the fresh material contacts the material in the kettle, a large concentration gradient difference is easily generated. The concentration gradient will gradually decrease with the increase of stirring time and finally reach consistency; and due to the existence of a high concentration range, it will cause a local violent reaction. Since the reaction is a violent exothermic reaction, a local hot spot will be generated. The hot spot needs a certain time to cool down. Therefore, a large concentration gradient will cause a high temperature gradient difference in the material in the kettle, and a high reaction temperature will reduce the selectivity of the reaction and increase side reactions, resulting in a lower yield of the final product.

[0003] At present, the valve opening of the device's feeding operation is mainly adjusted by on-site operators according to the temperature changes in the reactor. The degree of automation is relatively low, and there are gases volatilized from the materials on site, which are toxic and harmful to the health of employees. Utility Model Content

[0004] In view of the above deficiencies in the prior art, the utility model provides a reactor with a distributed feeding port to improve the dispersion effect of the material, avoid the situation where a high temperature gradient difference exists in the material in the reactor, which reduces the selectivity of the reaction, increases the side reactions, and leads to a lower yield of the final product. There is no need for on-site operators to adjust the valve opening according to the temperature changes in the reactor, thereby ensuring the health of the employees.

[0005] The technical solution adopted by the utility model to solve its technical problems is:

[0006] The reactor with a distributed feeding port comprises a reactor, a feeding port is fixedly arranged at the bottom end of the reactor, a feeding pipe is fixedly arranged through the top end of the reactor, a high-level trough is fixedly connected to the top end of the feeding pipe, and a distributed feeding port is fixedly connected to the bottom end of the feeding pipe. The distributed feeding port comprises a straight tube at the top, an accelerating tube in the middle and a distribution head at the bottom, the diameter of the accelerating tube is smaller than the diameters of the straight tube and the distribution head, a plurality of openings 1 are spaced apart on the outer wall of the distribution head, and a conical bottom is protruded upward at the bottom end of the distributed feeding port, and a plurality of openings 2 are spaced apart on the outer wall of the conical bottom.

[0007] Furthermore, the diameters of the straight tube and the distribution head are equal, and the diameter of the accelerating tube is one half to two thirds of the diameters of the straight tube and the distribution head.

[0008] Furthermore, the lowermost opening 2 is located at the connection between the conical bottom and the distribution head, and the number of the opening 2 is less than the number of the opening 1.

[0009] Furthermore, the material of the distributed feeding port is 316L stainless steel, the height of the conical bottom is 1-2 times the diameter of the straight pipe and the distribution head, the diameter of the straight pipe and the distribution head is 32-50mm, the wall thickness of the straight pipe and the distribution head is 2.5-5mm, and the diameter of opening one and opening two is 2-3mm.

[0010] Furthermore, a flow control valve group is arranged in the middle of the feeding pipe, and the flow control valve group is located outside the reactor.

[0011] Furthermore, a temperature sensor and a pressure sensor are sequentially arranged at the top of the reactor, and the temperature sensor and the flow control valve group are linked.

[0012] Furthermore, a jacket is arranged on the outer wall of the reactor, a cooling water inlet is arranged at the bottom of one side of the jacket, and a cooling water outlet is arranged at the top of the other side of the jacket.

[0013] Furthermore, a coil is fixedly arranged on the inner wall of the reactor, and the coil is spiral-shaped as a whole.

[0014] Furthermore, two cooling water inlets and two cooling water outlets are respectively provided on both sides of the top of the reactor. The second cooling water inlet is connected to one end of the coil, and the second cooling water outlet is connected to the other end of the coil.

[0015] Furthermore, a motor is fixedly arranged at the middle of the top of the reactor, a rotating shaft is fixedly connected to the output end of the motor, and the rotating shaft extends to the bottom of the inner cavity of the reactor, and a plurality of stirring paddles are fixedly arranged on the rotating shaft.

[0016] The beneficial effects of the utility model are:

[0017] The utility model arranges distributed feeding ports, and the materials are cut into small droplets by the openings one and two, and the diameter of the accelerating tube is smaller than that of the straight tube and the distribution head. The reduction of the diameter can accelerate the materials and improve the distribution effect of the materials in the distribution head. The bottom end of the distributed feeding port is upwardly protruded and provided with a conical bottom, which can reduce the internal space of the distribution head and further improve the distribution speed of the materials. The utility model can increase the contact area between the fresh material reaction and the materials in the reactor, shorten the mixing time, make the reaction speed of the materials in the reactor more balanced, reduce the local overheating caused by the violent reaction of high concentration, improve the selectivity of the reaction, reduce the occurrence of side reactions, make the temperature in the reactor more consistent during the feeding process, thereby reducing the temperature fluctuation of the feeding process, providing convenience for automatic control, and facilitating the remote operation of personnel. There is no need for on-site operators to adjust the valve opening according to the temperature changes in the reactor, so as to ensure the health of employees. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the distributed feeding port of the utility model;

[0020] Figure 3 This is a structural cross-sectional view of the distributed feeding port of the utility model;

[0021] Figure 4 It is a structural schematic diagram of the conical bottom and the second opening of the utility model.

[0022] In the figure: 1. Reactor; 2. Feeding pipe; 3. Distributed feeding port; 31. Straight pipe; 32. Accelerating tube; 33. Distribution head; 34. Opening 1; 35. Conical bottom; 36. Opening 2; 4. High-level tank; 5. Discharge port; 6. Jacket; 7. Cooling water inlet 1; 8. Cooling water outlet 1; 9. Coil; 10. Cooling water inlet 2; 11. Cooling water outlet 2; 12. Flow control valve group; 13. Motor; 14. Rotating shaft; 15. Agitator; 16. Temperature sensor; 17. Pressure sensor. DETAILED DESCRIPTION

[0023] The utility model is described and illustrated in detail below in conjunction with the accompanying drawings.

[0024] Example 1

[0025] like Figure 1-4As shown, the reactor with distributed feeding ports comprises a reactor 1, a discharge port 5 is fixedly arranged at the bottom end of the reactor 1, a feeding pipe 2 is fixedly arranged through the top end of the reactor 1, a high-level tank 4 is fixedly connected to the top end of the feeding pipe 2, a distributed feeding port 3 is fixedly connected to the bottom end of the feeding pipe 2, the distributed feeding port 3 comprises a straight tube 31 at the top, an accelerating tube 32 at the middle and a distribution head 33 at the bottom, the diameter of the accelerating tube 32 is smaller than the diameters of the straight tube 31 and the distribution head 33, a plurality of openings 34 are spaced apart on the outer wall of the distribution head 33, a conical bottom 35 is protruded upward at the bottom end of the distributed feeding port 3, a plurality of openings 36 are spaced apart on the outer wall of the conical bottom 35.

[0026] By setting up a distributed feeding port 3, the material is refined and cut into small droplets by the opening 1 34 and the opening 2 36, and the diameter of the accelerating tube 32 is smaller than the diameters of the straight tube 31 and the distribution head 33. The reduction in the diameter can accelerate the material and improve the distribution effect of the material in the distribution head 33; the bottom end of the distributed feeding port 3 is upwardly protruding and provided with a conical bottom 35, which can reduce the internal space of the distribution head 33 and further improve the distribution speed of the material; the utility model can increase the contact area between the fresh material and the material in the reactor 1, shorten the mixing time, make the reaction speed of the material in the reactor 1 more balanced, reduce local overheating caused by high-concentration violent reaction, improve the selectivity of the reaction, reduce the occurrence of side reactions, and make the temperature in the reactor 1 more consistent during the feeding process, thereby reducing the temperature fluctuation of the feeding process, providing convenience for automatic control, and facilitating remote operation of personnel; there is no need for on-site operators to adjust the valve opening according to the temperature changes in the reactor 1, thereby ensuring the health of employees.

[0027] The diameters of the straight tube 31 and the distribution head 33 are equal, and the diameter of the accelerating tube 32 is one half to two thirds of the diameters of the straight tube 31 and the distribution head 33 .

[0028] The second opening 36 at the bottom is located at the connection between the conical bottom 35 and the distribution head 33, and the number of the second openings 36 is less than the number of the first openings 34. The number of the second openings 36 is less than the number of the first openings 34, which can ensure that more materials are thrown out from the outer wall of the distribution head 33 than from its bottom, thereby increasing the distribution area of ​​fresh materials; the second opening 36 at the bottom is located at the connection between the conical bottom 35 and the distribution head 33, ensuring that no materials remain in the distribution head 33 after the feeding is completed.

[0029] The material of the distributed feeding port 3 is 316L stainless steel, the height of the conical bottom 35 is 1-2 times the diameter of the straight pipe 31 and the distribution head 33, the diameter of the straight pipe 31 and the distribution head 33 is 32-50mm, the wall thickness of the straight pipe 31 and the distribution head 33 is 2.5-5mm, and the diameter of the opening 1 34 and the opening 2 36 is 2-3mm.

[0030] A flow control valve group 12 is provided in the middle of the feeding pipe 2 , and the flow control valve group 12 is located outside the reactor 1 .

[0031] The top of the reactor 1 is provided with a temperature sensor 16 and a pressure sensor 17 in sequence, and the temperature sensor 16 is linked to the flow control valve group 12. The flow control valve group 12 can automatically adjust the valve opening according to the temperature change in the reactor 1 through the linkage between the temperature sensor 16 and the flow control valve group 12.

[0032] A jacket 6 is provided on the outer wall of the reactor 1 , a cooling water inlet 7 is provided at the bottom of one side of the jacket 6 , and a cooling water outlet 8 is provided at the top of the other side of the jacket 6 .

[0033] A coil 9 is fixedly arranged on the inner wall of the reactor 1, and the coil 9 is spiral in shape as a whole.

[0034] A cooling water inlet 10 and a cooling water outlet 11 are respectively provided on both sides of the top of the reactor 1 . The cooling water inlet 10 is connected to one end of the coil 9 , and the cooling water outlet 11 is connected to the other end of the coil 9 .

[0035] A motor 13 is fixedly arranged at the middle of the top of the reactor 1 , and a rotating shaft 14 is fixedly connected to the output end of the motor 13 . The rotating shaft 14 extends to the bottom of the inner cavity of the reactor 1 , and a plurality of stirring paddles 15 are fixedly arranged on the rotating shaft 14 .

Claims

1. A reactor with distributed feeding ports, comprising a reactor (1), characterized in that: A discharge port (5) is fixedly provided at the bottom end of the reactor (1), a feeding pipe (2) is fixedly provided through the top end of the reactor (1), a high-level tank (4) is fixedly connected to the top end of the feeding pipe (2), a distributed feeding port (3) is fixedly connected to the bottom end of the feeding pipe (2), the distributed feeding port (3) comprises a straight tube (31) at the top, an accelerating tube (32) at the middle, and a distribution head (33) at the bottom, the diameter of the accelerating tube (32) is smaller than the diameters of the straight tube (31) and the distribution head (33), a plurality of openings (34) are provided at intervals on the outer wall of the distribution head (33), a conical bottom (35) is provided at the bottom end of the distributed feeding port (3) in an upwardly protruding manner, and a plurality of openings (36) are provided at intervals on the outer wall of the conical bottom (35).

2. The reactor with distributed feeding ports according to claim 1, characterized in that: The diameters of the straight tube (31) and the distribution head (33) are equal, and the diameter of the accelerating tube (32) is one half to two thirds of the diameters of the straight tube (31) and the distribution head (33).

3. The reactor with distributed feeding ports according to claim 2, characterized in that: The lowermost opening 2 (36) is located at the connection between the conical bottom (35) and the distribution head (33), and the number of the opening 2 (36) is less than the number of the opening 1 (34).

4. The reactor with distributed feeding ports according to claim 3, characterized in that: The material of the distributed feeding port (3) is 316L stainless steel. The height of the conical bottom (35) is 1-2 times the diameter of the straight pipe (31) and the distribution head (33). The diameter of the straight pipe (31) and the distribution head (33) is 32-50 mm. The wall thickness of the straight pipe (31) and the distribution head (33) is 2.5-5 mm. The diameter of the opening 1 (34) and the opening 2 (36) is 2-3 mm.

5. The reactor with distributed feeding ports according to claim 1, characterized in that: A flow control valve group (12) is provided in the middle of the feeding pipe (2), and the flow control valve group (12) is located outside the reaction kettle (1).

6. The reactor with distributed feeding ports according to claim 5, characterized in that: A temperature sensor (16) and a pressure sensor (17) are arranged in sequence at the top of the reaction kettle (1), and the temperature sensor (16) and the flow control valve group (12) are linked.

7. The reactor with distributed feeding ports according to claim 1, characterized in that: A jacket (6) is provided on the outer wall of the reaction kettle (1), a cooling water inlet (7) is provided at the bottom of one side of the jacket (6), and a cooling water outlet (8) is provided at the top of the other side of the jacket (6).

8. The reactor with distributed feeding ports according to claim 1, characterized in that: A coil (9) is fixedly arranged on the inner wall of the reaction kettle (1), and the coil (9) is spiral-shaped as a whole.

9. The reactor with distributed feeding ports according to claim 8, characterized in that: A second cooling water inlet (10) and a second cooling water outlet (11) are respectively provided on both sides of the top of the reactor (1); the second cooling water inlet (10) is connected to one end of the coil (9), and the second cooling water outlet (11) is connected to the other end of the coil (9).

10. The reactor with distributed feeding ports according to claim 1, characterized in that: A motor (13) is fixedly arranged at the middle of the top of the reaction kettle (1), and a rotating shaft (14) is fixedly connected to the output end of the motor (13). The rotating shaft (14) extends to the bottom of the inner cavity of the reaction kettle (1), and a plurality of groups of stirring paddles (15) are fixedly arranged on the rotating shaft (14).

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