A modified esterification reactor

Abstract

The present invention relates to the technical field of reactors, and a modified esterification reactor, comprising a reactor body, wherein the top and bottom of the reactor body are respectively provided with a feed port and a discharge port, and the bottom of the reactor body is provided with a leg, a heating wire is provided inside the side wall of the reactor body, and a transmission mechanism is provided on the top of the reactor body, wherein the transmission mechanism comprises a rotating shaft and a rotating column, wherein the rotating column and the rotating shaft are rotatably connected, one end of the rotating shaft is rotatably connected with the inner bottom wall of the reactor body, one end of the rotating column passes through the top of the reactor body, and the rotating column is rotatably connected with the top of the reactor body, and a long connecting rod is fixedly installed on the circumference of the rotating column located inside the reactor body. The modified esterification reactor can make the rotating shaft and the rotating column reciprocate through the cooperation of a turntable, a rack rod and a driven gear, thereby disrupting the orderly state of the solution in the reactor body, and the positions of the nozzles opened on the second slide plate and the first slide plate correspond to each other, so that the solution collides again during the spraying process, and contacts with solutions of different densities more evenly.

Description

Technical Field

[0001] The invention relates to the technical field of reactors, in particular to a modified esterification reactor. Background Art

[0002] Citric acid esters refer to a series of products such as tributyl citrate, trioctyl citrate, and diethyl acetyl citrate produced using citric acid as the basic raw material. They are a new type of safe and environmentally friendly plasticizer.

[0003] The traditional method of producing citric acid esters is to put citric acid, alcohol and catalyst into a kettle reactor, stir and heat to carry out esterification reaction, and then neutralize and wash with water after the esterification reaction is completed to achieve the purpose of separating the catalyst. Subsequently, citric acid esters with a purity of more than 99.5% are obtained through distillation, decolorization and filtration.

[0004] For example, the patent with announcement number CN213254377U discloses a reactor for synthesizing trioctyl citrate, which is applied to the synthesis of trioctyl citrate compounds, including a cylinder, a feed port, a speed regulating rotating device, a connecting gear, a rotating shaft, a connecting rod, a wave plate, a turbine stirring paddle, a discharge port, and a magnetic stirring device. The cylinder is provided with a feed port at the top, a discharge port at the bottom, a magnetic stirring device at the center of the bottom surface of the outer wall of the cylinder, and a magnetic stirring rotor is placed at the center of the inner bottom surface of the cylinder; the rotating shaft is inserted into the cylinder from the center of the top surface of the outer wall of the cylinder, a connecting gear is installed at the top of the rotating shaft, a speed regulating rotating device is installed at the top of the connecting gear, the bottom end of the rotating shaft penetrates into the upper part of the inner bottom surface of the cylinder, a turbine stirring paddle is installed at the bottom of the rotating shaft, a symmetrical connecting rod is connected to the side of the rotating shaft inside the cylinder, and the connecting rod is connected to a wave plate with a wavy outer edge. The device has the characteristics of simple structure, good mixing effect, and high conversion efficiency.

[0005] However, the reactor for synthesizing trioctyl citrate cannot exchange the solution at the bottom with the solution at the top, and stratification will occur due to the different concentrations of the raw materials. In addition, the single rotation of the stirring blade during the stirring process will make the solution approach dynamic equilibrium, reducing the stirring effect and resulting in an incomplete esterification reaction. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a modified esterification reactor, which has the advantages of sufficient reaction and high efficiency, and solves the problem of insufficient esterification reaction due to stratification.

[0007] In order to solve the problems raised by the above-mentioned background technology, the present invention provides the following technical solutions: a modified esterification reaction kettle, comprising a kettle body, wherein the top and bottom of the kettle body are respectively provided with a feed port and a discharge port, and the bottom of the kettle body is provided with a support leg, a heating wire is provided inside the side wall of the kettle body, and a transmission mechanism is provided on the top of the kettle body, wherein the transmission mechanism comprises a rotating shaft and a rotating column, wherein the rotating column and the rotating shaft are rotatably connected, one end of the rotating shaft is rotatably connected to the inner bottom wall of the kettle body, one end of the rotating column passes through the top of the kettle body, and the rotating column is rotatably connected to the top of the kettle body, and the rotating column is fixedly arranged on the circumferential surface inside the kettle body. A long connecting rod is installed, and the circumferential surface of the rotating shaft located inside the kettle body is fixedly installed with a short connecting rod and a fixed plate from top to bottom, an outer rotating rod is rotatably installed on the lower surface of the long connecting rod, the bottom end of the outer rotating rod passes through the fixed plate, the outer rotating rod is rotatably connected to the fixed plate, a fixing rod is fixedly installed on the upper surface of the fixed plate, a second outer ring plate is fixedly installed on the upper surface of the fixed rod, a first stirring drum is fixedly installed on the upper surface of the second outer ring plate, and the first stirring drum is coaxial with the outer rotating rod, the first outer ring plate is fixedly installed on the top of the first stirring drum, and an inner rotating rod is rotatably installed on the lower surface of the short connecting rod.

[0008] Preferably, the transmission mechanism also includes a motor, a rack rod, a driven gear, a U-shaped plate, a second bevel gear and a first bevel gear. A bracket is fixedly mounted on the upper surface of the kettle body, the motor is arranged on the upper surface of the kettle body, and the shape of the bracket is an inverted U-shape, a turntable is fixedly mounted on the output end of the motor, the rack rod is rotatably connected to the upper surface of the turntable, the top end of the rotating shaft is rotatably connected to the surface of the bracket, the U-shaped plate is rotatably connected to the circumferential surface of the rotating shaft, the driven gear is fixedly mounted on the rotating shaft, and the driven gear is located in the middle of the U-shaped plate, the first bevel gear is rotatably connected to the surface of the bracket, and the second bevel gear is fixedly mounted on the circumferential surface of the rotating shaft and is located below the U-shaped plate.

[0009] Preferably, a surface of the rotating column close to the second bevel gear is a conical tooth surface, the first bevel gear is located between the second bevel gear and the rotating column, and the first bevel gear is meshed with the second bevel gear and the rotating column respectively.

[0010] Preferably, the rack rod is slidably connected to the U-shaped plate, and the rack rod is meshed with the driven gear.

[0011] Preferably, a first channel and a second channel are provided inside the outer rotating rod, both ends of the first channel and the second channel pass through the outer rotating rod, the inner sides of the first outer ring plate and the second outer ring plate are slidably mounted with a first slide plate, both ends of the first channel pass through the circumference of the outer rotating rod, and the top end of the first channel is located above the first outer ring plate, and the bottom end is located inside the second outer ring plate, the top end of the second channel passes through the circumference of the outer rotating rod and is located inside the first outer ring plate, and the bottom end of the second channel passes through the bottom of the outer rotating rod.

[0012] Preferably, a second compression spring is fixedly installed on the surface of one end of the second channel located inside the first outer ring plate, and a second compression spring is also fixedly installed on the surface of one end of the first channel located inside the second outer ring plate. A second baffle is fixedly installed on one end of the second compression spring, and a limiting plate is fixedly installed on the lower surface of the second baffle. Limiting grooves are provided on the surfaces of the first channel and the second channel, and the limiting plate is slidably installed in the limiting grooves.

[0013] Preferably, an outer toothed ring plate is fixedly installed on the inner side wall of the kettle body, a first gear is fixedly installed on the circumference of the outer rotating rod close to the long connecting rod, the first gear is meshed with the outer toothed ring plate, an inner toothed ring plate is fixedly installed on the lower surface of the long connecting rod, a second gear is fixedly installed on the circumference of the inner rotating rod close to the short connecting rod, the second gear is meshed with the inner toothed ring plate, the circumference of the inner rotating rod is sequentially sleeved with the first inner ring plate and the second inner ring plate from top to bottom, a second stirring drum is fixedly installed between the first inner ring plate and the second inner ring plate, and the second stirring drum is coaxial with the inner rotating rod.

[0014] Preferably, the outer sides of the first inner ring plate and the second inner ring plate are both slidably mounted with a second slide, the surface of the second slide is fixedly mounted with a synchronization rod, the end of the synchronization rod away from the second slide is fixedly connected to the first slide, the second slide and the first slide are both provided with grooves on the sides away from each other, the surface of the groove is fixedly mounted with a first compression spring, one end of the first compression spring is fixedly mounted with a first baffle, the first baffle is slidably mounted in the groove, the side of the groove is provided with a nozzle for spraying liquid, and the positions of the nozzles on the first slide and the second slide correspond to each other.

[0015] Preferably, threads are provided on the circumference of the inner rotating rod and the outer rotating rod, and pistons are threadedly connected to each other. The pistons are slidably installed in the first mixing drum and the second mixing drum. Slide grooves are provided on the circumference of the pistons. Slide rods are fixedly installed on the inner surfaces of the first mixing drum and the second mixing drum, and the slide rods are slidably connected in the slide grooves.

[0016] Preferably, the interior of the inner rotating rod is also provided with a first channel and a second channel which are the same as those of the outer rotating rod, the top end of the first channel on the inner rotating rod passes through the circumference of the inner rotating rod and is located above the first inner ring plate, and the bottom end passes through the circumference of the inner rotating rod and is located inside the second inner ring plate, the top end of the second channel on the inner rotating rod passes through the circumference of the inner rotating rod and is located inside the first inner ring plate, and the bottom end passes through the bottom of the outer inner rotating rod.

[0017] Compared with the prior art, the present invention provides a modified esterification reactor, which has the following beneficial effects:

[0018] 1. The modified esterification reaction kettle is arranged by the cooperation of the second bevel gear, the first bevel gear and the rotating column. The second bevel gear rotates in the opposite direction to the rotating column, so that the solution in the kettle can be fully stirred. Through the cooperation of the turntable, the rack rod and the driven gear, the driven gear can drive the rotating shaft to rotate back and forth periodically, and at the same time, the rotating column also rotates back and forth, thereby disturbing the orderly state of the solution in the kettle.

[0019] 2. The modified esterification reaction kettle is provided with an outer gear ring plate and a first gear, an inner gear ring plate and a second gear. The outer rotating rod and the inner rotating rod rotate while the rotating shaft rotates. Threads are provided on the surfaces of the outer rotating rod and the inner rotating rod. The piston can move up and down during the rotation. Through the cooperation of the first channel and the second channel, the piston can extract the liquid at the top and the bottom of the kettle body into the first mixing drum and the second mixing drum through the first channel and the second channel respectively when moving up and down. Then, the movement of the piston squeezes the solutions in the first mixing drum and the second mixing drum respectively, and sprays them from the nozzles to exchange the solutions and mix them. The solutions are fully reacted under the stirring of the first mixing drum and the second mixing drum. A synchronization rod is provided, and the positions of the nozzles opened on the second slide plate and the first slide plate correspond to each other, so that the solutions collide again during the spraying process, and contact with the solutions with different densities more evenly, thereby improving the reaction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 A sectional view of the main view of the present invention;

[0022] Figure 3 for Figure 2 The enlarged view of point D in the middle;

[0023] Figure 4 for Figure 2 The enlarged view of point A in the middle;

[0024] Figure 5 for Figure 4 The enlarged view of point B in the middle;

[0025] Figure 6 A sectional view of a bottom view of the present invention;

[0026] Figure 7 is a cross-sectional view of a top view of the present invention;

[0027] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0028] Fig. 9 It is a schematic diagram of the structure inside the kettle body of the present invention;

[0029] Fig.10It is an exploded view of the transmission mechanism of the present invention.

[0030] In the figure: 1, kettle body; 2, fixed rod; 3, inner gear ring plate; 4, short connecting rod; 5, heating wire; 6, first stirring drum; 7, first slide plate; 8, first outer ring plate; 9, transmission mechanism; 10, long connecting rod; 11, outer gear ring plate; 12, inner rotating rod; 13, outer rotating rod; 14, second slide plate; 15, fixed plate; 16, first inner ring plate; 17, synchronous rod; 18, first channel; 19, second channel; 20, nozzle; 21, groove; 22, first compression spring; 23, first baffle; 2 4. second compression spring; 25. second baffle plate; 26. limiting plate; 27. limiting groove; 28. first gear; 29. ​​second gear; 30. slide groove; 31. piston; 32. slide rod; 33. second outer ring plate; 34. second inner ring plate; 35. second mixing drum; 901. first bevel gear; 902. motor; 903. bracket; 904. U-shaped plate; 905. second bevel gear; 906. rotating column; 907. rotating shaft; 908. turntable; 909. rack rod; 910. driven gear. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-Figure 10 A modified esterification reaction kettle comprises a kettle body 1, wherein the top and bottom of the kettle body 1 are respectively provided with a feed port and a discharge port, and the bottom of the kettle body 1 is provided with a support leg, a heating wire 5 is provided inside the side wall of the kettle body 1, and a transmission mechanism 9 is provided on the top of the kettle body 1, wherein the transmission mechanism 9 comprises a rotating shaft 907 and a rotating column 906, wherein the rotating column 906 is rotatably connected to the rotating shaft 907, wherein one end of the rotating shaft 907 is rotatably connected to the inner bottom wall of the kettle body 1, wherein one end of the rotating column 906 passes through the top of the kettle body 1, and the rotating column 906 is rotatably connected to the top of the kettle body 1, wherein a long connecting rod 10 is fixedly installed on the circumference of the rotating column 906 located inside the kettle body 1, and the rotating shaft 907 is rotatably connected to the inner bottom wall of the kettle body 1, wherein the rotating column 906 is rotatably connected to the top of the kettle body 1, wherein the rotating column 906 is located inside the kettle body 1, and wherein the rotating shaft 907 is rotatably connected to the inner bottom wall of the kettle body 1, wherein the rotating column 906 ... A short connecting rod 4 and a fixing plate 15 are fixedly installed on the circumferential surface inside the kettle body 1 from top to bottom, an outer rotating rod 13 is rotatably installed on the lower surface of the long connecting rod 10, the bottom end of the outer rotating rod 13 passes through the fixing plate 15, the outer rotating rod 13 is rotatably connected to the fixing plate 15, a fixing rod 2 is fixedly installed on the upper surface of the fixing plate 15, a second outer ring plate 33 is fixedly installed on the upper surface of the fixing rod 2, a first mixing drum 6 is fixedly installed on the upper surface of the second outer ring plate 33, and the first mixing drum 6 is coaxial with the outer rotating rod 13, a first outer ring plate 8 is fixedly installed on the top end of the first mixing drum 6, and an inner rotating rod 12 is rotatably installed on the lower surface of the short connecting rod 4.

[0033] The transmission mechanism 9 also includes a motor 902, a rack rod 909, a driven gear 910, a U-shaped plate 904, a second bevel gear 905 and a first bevel gear 901. A bracket 903 is fixedly installed on the upper surface of the kettle body 1. The motor 902 is arranged on the upper surface of the kettle body 1, and the shape of the bracket 903 is an inverted U shape. A turntable 908 is fixedly installed on the output end of the motor 902. The rack rod 909 is rotatably connected to the upper surface of the turntable 908. The top of the rotating shaft 907 is rotatably connected to the surface of the bracket 903. The U-shaped plate 904 is rotatably connected to the circumference of the rotating shaft 907. The driven gear 910 is fixedly installed with the rotating shaft 907, and the driven gear 910 is located in the middle of the U-shaped plate 904. The first bevel gear 901 is rotatably connected to the surface of the bracket 903. The second bevel gear 905 is fixedly installed on the circumference of the rotating shaft 907 and is located below the U-shaped plate 904.

[0034] A surface of the rotating post 906 close to the second bevel gear 905 is a conical tooth surface. The first bevel gear 901 is located between the second bevel gear 905 and the rotating post 906 , and the first bevel gear 901 is meshed with the second bevel gear 905 and the rotating post 906 , respectively.

[0035] The rack rod 909 is slidably connected to the U-shaped plate 904 , and the rack rod 909 is meshed with the driven gear 910 . The matching arrangement of the rack rod 909 and the U-shaped plate 904 can ensure the stable meshing of the rack rod 909 and the driven gear 910 .

[0036] A first channel 18 and a second channel 19 are provided inside the outer rotating rod 13, and both ends of the first channel 18 and the second channel 19 pass through the outer rotating rod 13. The inner sides of the first outer ring plate 8 and the second outer ring plate 33 are slidably mounted with a first slide plate 7. Both ends of the first channel 18 pass through the circumference of the outer rotating rod 13, and the top end of the first channel 18 is located above the first outer ring plate 8, and the bottom end is located inside the second outer ring plate 33. The top end of the second channel 19 passes through the circumference of the outer rotating rod 13 and is located inside the first outer ring plate 8, and the bottom end of the second channel 19 passes through the bottom of the outer rotating rod 13.

[0037] A second compression spring 24 is fixedly installed on the surface of one end of the second channel 19 located inside the first outer ring plate 8, and a second compression spring 24 is also fixedly installed on the surface of one end of the first channel 18 located inside the second outer ring plate 33. A second baffle plate 25 is fixedly installed on one end of the second compression spring 24, and a limiting plate 26 is fixedly installed on the lower surface of the second baffle plate 25. Limiting grooves 27 are provided on the surfaces of the first channel 18 and the second channel 19, and the limiting plate 26 is slidably installed in the limiting grooves 27.

[0038] An outer toothed ring plate 11 is fixedly installed on the inner side wall of the kettle body 1, a first gear 28 is fixedly installed on the circumference of the outer rotating rod 13 near the long connecting rod 10, the first gear 28 is meshed with the outer toothed ring plate 11, an inner toothed ring plate 3 is fixedly installed on the lower surface of the long connecting rod 10, a second gear 29 is fixedly installed on the circumference of the inner rotating rod 12 near the short connecting rod 4, the second gear 29 is meshed with the inner toothed ring plate 3, the circumference of the inner rotating rod 12 is sequentially sleeved with the first inner ring plate 16 and the second inner ring plate 34 from top to bottom, a second stirring drum 35 is fixedly installed between the first inner ring plate 16 and the second inner ring plate 34, and the second stirring drum 35 is coaxial with the inner rotating rod 12.

[0039] The second slide plate 14 is slidably mounted on the outer side surfaces of the first inner ring plate 16 and the second inner ring plate 34, and a synchronization rod 17 is fixedly mounted on the surface of the second slide plate 14. The end of the synchronization rod 17 away from the second slide plate 14 is fixedly connected to the first slide plate 7. A groove 21 is provided on the side of the second slide plate 14 and the first slide plate 7 away from each other, and a first compression spring 22 is fixedly mounted on the surface of the groove 21. A first baffle 23 is fixedly mounted on one end of the first compression spring 22. The first baffle 23 is slidably mounted in the groove 21. A nozzle 20 for liquid spraying is provided on the side of the groove 21, and the positions of the nozzles 20 on the first slide plate 7 and the second slide plate 14 correspond to each other.

[0040] The circumferential surfaces of the inner rotating rod 12 and the outer rotating rod 13 are both provided with threads, and are both threadedly connected with a piston 31. The piston 31 is slidably installed in the first mixing drum 6 and the second mixing drum 35. The circumferential surface of the piston 31 is provided with a slide groove 30. The inner surfaces of the first mixing drum 6 and the second mixing drum 35 are both fixedly installed with a slide rod 32, and the slide rod 32 is slidably connected in the slide groove 30.

[0041] The interior of the inner rotating rod 12 is also provided with a first channel 18 and a second channel 19 which are the same as those of the outer rotating rod 13. The top end of the first channel 18 on the inner rotating rod 12 passes through the circumference of the inner rotating rod 12 and is located above the first inner ring plate 16, and the bottom end passes through the circumference of the inner rotating rod 12 and is located inside the second inner ring plate 34. The top end of the second channel 19 on the inner rotating rod 12 passes through the circumference of the inner rotating rod 12 and is located inside the first inner ring plate 16, and the bottom end passes through the bottom of the outer inner rotating rod 12.

[0042] When using the modified esterification reactor, citric acid, ethanol and catalyst are first added into the reactor body 1 from the feed port, and then the motor 902 and the heating wire 5 are started. The motor 902 drives the turntable 908 to rotate, and the turntable 908 rotates to pull the rack rod 909 to move. When the rack rod 909 moves, it drives the rotating shaft 907 to rotate through the meshing with the driven gear 910. The rotating shaft 907 drives the rotating column 906 to rotate in the opposite direction through the first bevel gear 901. At the same time, the rotating column 906 drives the outer The rotating rod 13 rotates, and the rotating shaft 907 drives the inner rotating rod 12 to rotate through the short connecting rod 4. At the same time, the first outer ring plate 8 and the first inner ring plate 16 rotate in opposite directions relative to each other, driving the first stirring drum 6 and the second stirring drum 35 to stir the solution. When the turntable 908 rotates half a circle, the relative movement direction of the rack rod 909 and the rotating shaft 907 changes, and then the rotation direction of the rotating shaft 907 and the rotating column 906 changes, and the rotation direction of the inner rotating rod 12 and the outer rotating rod 13 changes, breaking the motion state of the solution in the kettle body 1.

[0043] When the outer rotating rod 13 rotates, the first gear 28 meshes with the outer gear ring plate 11 to make the outer rotating rod 13 rotate. The outer rotating rod 13 drives the piston 31 to move up and down in the first mixing drum 6 through the thread, so as to extract and compress the liquid in the first mixing drum 6 and discharge it.

[0044] When the piston 31 in the first stirring drum 6 moves upward, the solution at the bottom of the kettle body 1 no longer enters the first stirring drum 6 from the second channel 19. At this time, the second baffle 25 located in the second channel 19 pushes the limit plate 26 downward under the action of the second compression spring 24 until the limit plate 26 slides to one end of the limit groove 27 and stops moving. At this time, the second baffle 25 just completely blocks the second channel 19. When the piston 31 pushes the solution upward, the solution cannot be discharged from the second channel 19. At this time, the solution pressure above the piston 31 increases, that is, the pressure in the first outer ring plate 8 is increased. The solution pushes the first baffle 23 to slide in the groove 21. When the first baffle 23 is separated from the nozzle 20, the liquid is sprayed from the nozzle 20 into the kettle body 1, completing the extraction of the solution at the bottom of the kettle body 1 into the solid top solution. While the piston 31 moves upward, the solution at the top of the kettle body 1 is sucked into the first stirring drum 6 from the first channel 18. At this time, the second baffle 25 located in the first channel 18 compresses the second compression spring 24 under the impact of the solution, so that the first channel 18 is connected with the first stirring drum 6, which facilitates the solution at the top of the kettle body 1 to enter the first stirring drum 6.

[0045] When the piston 31 in the first mixing drum 6 turns to move downward, the solution in the kettle body 1 no longer enters the first mixing drum 6 from the first channel 18, and the second baffle 25 in the first channel 18 blocks the first channel 18 under the action of the second compression spring 24. Then, the solution at the bottom of the piston 31 in the first mixing drum 6 is squeezed and sprayed out from the nozzle 20 on the first slide plate 7 installed on the inner side of the second outer ring plate 33, so as to draw the solution at the top of the kettle body 1 into the solution at the bottom of the kettle body 1.

[0046] Similarly, when the outer rotating rod 13 rotates, the second gear 29 meshes with the inner gear ring plate 3 to cause the inner rotating rod 12 to rotate. When the inner rotating rod 12 rotates, it also drives the piston 31 on its circumference to move up and down, and the movement direction is the same as that of the piston 31 on the circumference of the outer rotating rod 13. Finally, the solution is sprayed out through the nozzle 20 opened on the surface of the second slide plate 14.

[0047] Since the nozzles 20 provided on the first slide plate 7 and the second slide plate 14 are located opposite to each other, the sprayed solutions form convection, thereby making the solutions mixed more fully.

[0048] After the esterification reaction in the kettle body 1 is completed, it is discharged from the discharge port.

[0049] In summary, the modified esterification reaction kettle, through the cooperation of the second bevel gear 905, the first bevel gear 901 and the rotating column 906, the second bevel gear 905 and the rotating column 906 rotate in opposite directions, and the solution in the kettle body 1 can be fully stirred. Through the cooperation of the turntable 908, the rack rod 909 and the driven gear 910, the driven gear 910 can drive the rotating shaft 907 to rotate back and forth periodically, and at the same time, the rotating column 906 also rotates back and forth, disrupting the orderly state of the solution in the kettle body 1. Through the cooperation of the outer gear ring plate 11 and the first gear 28, the inner gear ring plate 3 and the second gear 29, the outer rotating rod 13 and the inner rotating rod 12 rotate while the rotating shaft 907 rotates. Threads are provided on the surfaces of the outer rotating rod 13 and the inner rotating rod 12, and the active rotating rod 13 and the inner rotating rod 12 rotate when rotating. The plug 31 can move up and down. Through the coordination of the first channel 18 and the second channel 19, the piston 31 can extract the liquid at the top and bottom of the kettle body 1 through the first channel 18 and the second channel 19 into the first mixing drum 6 and the second mixing drum 35 respectively while moving up and down. Then, the movement of the piston 31 squeezes the solutions in the first mixing drum 6 and the second mixing drum 35 respectively, and sprays them from the nozzle 20 to exchange the solutions and mix them. Then, the solutions are fully reacted under the stirring of the first mixing drum 6 and the second mixing drum 35. The synchronization rod 17 is set, and the positions of the nozzles 20 opened on the second slide plate 14 and the first slide plate 7 correspond to each other, so that the solutions collide again during the spraying process, and contact with the solutions with different densities more evenly, thereby improving the reaction efficiency.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A modified esterification reaction kettle, comprising a kettle body (1), wherein the top and bottom of the kettle body (1) are respectively provided with a feed inlet and a discharge outlet, and the bottom of the kettle body (1) is provided with supporting legs, and a heating wire (5) is provided inside the side wall of the kettle body (1), characterized in that: A transmission mechanism (9) is provided at the top of the kettle body (1), the transmission mechanism (9) comprising a rotating shaft (907) and a rotating column (906), the rotating column (906) and the rotating shaft (907) being rotatably connected, one end of the rotating shaft (907) being rotatably connected to the inner bottom wall of the kettle body (1), one end of the rotating column (906) passing through the top of the kettle body (1), and the rotating column (906) being rotatably connected to the top of the kettle body (1), a long connecting rod (10) being fixedly mounted on the circumference of the rotating column (906) located inside the kettle body (1), and a short connecting rod (4) and a fixing plate (15) being fixedly mounted on the circumference of the rotating shaft (907) located inside the kettle body (1) from top to bottom. The outer rotating rod (13) is rotatably mounted on the lower surface of the long connecting rod (10), the bottom end of the outer rotating rod (13) passes through the fixed plate (15), the outer rotating rod (13) is rotatably connected to the fixed plate (15), the fixed rod (2) is fixedly mounted on the upper surface of the fixed plate (15), the second outer ring plate (33) is fixedly mounted on the upper surface of the fixed rod (2), the first stirring drum (6) is fixedly mounted on the upper surface of the second outer ring plate (33), and the first stirring drum (6) is coaxial with the outer rotating rod (13), the first outer ring plate (8) is fixedly mounted on the top end of the first stirring drum (6), and the inner rotating rod (12) is rotatably mounted on the lower surface of the short connecting rod (4); A first channel (18) and a second channel (19) are provided inside the outer rotating rod (13), both ends of the first channel (18) and the second channel (19) pass through the outer rotating rod (13), the inner side surfaces of the first outer ring plate (8) and the second outer ring plate (33) are both slidably mounted with a first slide plate (7), both ends of the first channel (18) pass through the circumference of the outer rotating rod (13), the top end of the first channel (18) is located above the first outer ring plate (8), and the bottom end is located inside the second outer ring plate (33), the top end of the second channel (19) passes through the circumference of the outer rotating rod (13) and is located inside the first outer ring plate (8), and the bottom end of the second channel (19) passes through the bottom of the outer rotating rod (13); An outer toothed ring plate (11) is fixedly mounted on the inner side wall of the kettle body (1); a first gear (28) is fixedly mounted on the circumference of the outer rotating rod (13) near the long connecting rod (10), and the first gear (28) meshes with the outer toothed ring plate (11); an inner toothed ring plate (3) is fixedly mounted on the lower surface of the long connecting rod (10); a second gear (29) is fixedly mounted on the circumference of the inner rotating rod (12) near the short connecting rod (4), and the second gear (29) meshes with the inner toothed ring plate (3); a first inner ring plate (16) and a second inner ring plate (34) are sleeved on the circumference of the inner rotating rod (12) in sequence from top to bottom; a second stirring drum (35) is fixedly mounted between the first inner ring plate (16) and the second inner ring plate (34), and the second stirring drum (35) is coaxial with the inner rotating rod (12); The outer side surfaces of the first inner ring plate (16) and the second inner ring plate (34) are both slidably mounted with a second slide plate (14), a synchronization rod (17) is fixedly mounted on the surface of the second slide plate (14), and the end of the synchronization rod (17) away from the second slide plate (14) is fixedly connected to the first slide plate (7), and the second slide plate (14) and the first slide plate (7) are both provided with a groove (21) on the side away from each other, and a first compression spring (22) is fixedly mounted on the surface of the groove (21), and a first baffle (23) is fixedly mounted on one end of the first compression spring (22), and the first baffle (23) is slidably mounted in the groove (21), and a nozzle (20) for spraying liquid is provided on the side surface of the groove (21), and the positions of the nozzles (20) on the first slide plate (7) and the second slide plate (14) correspond to each other; The circumferential surfaces of the inner rotating rod (12) and the outer rotating rod (13) are both provided with threads, and are both threadedly connected to pistons (31). The pistons (31) are slidably mounted in the first mixing drum (6) and the second mixing drum (35). The circumferential surfaces of the pistons (31) are provided with sliding grooves (30). The inner surfaces of the first mixing drum (6) and the second mixing drum (35) are both fixedly mounted with sliding rods (32), and the sliding rods (32) are slidably connected in the sliding grooves (30).

2. A modified esterification reactor according to claim 1, characterized in that: The transmission mechanism (9) further comprises a motor (902), a rack rod (909), a driven gear (910), a U-shaped plate (904), a second bevel gear (905) and a first bevel gear (901); a bracket (903) is fixedly mounted on the upper surface of the kettle body (1); the motor (902) is arranged on the upper surface of the kettle body (1), and the bracket (903) is in the shape of an inverted U; a rotating disk (908) is fixedly mounted on the output end of the motor (902); the rack rod (909) is rotatably connected to the rotating disk ( The top end of the rotating shaft (907) is rotatably connected to the surface of the bracket (903), the U-shaped plate (904) is rotatably connected to the circumference of the rotating shaft (907), the driven gear (910) is fixedly mounted on the rotating shaft (907), and the driven gear (910) is located in the middle of the U-shaped plate (904), the first bevel gear (901) is rotatably connected to the surface of the bracket (903), and the second bevel gear (905) is fixedly mounted on the circumference of the rotating shaft (907) and is located below the U-shaped plate (904).

3. A modified esterification reaction kettle according to claim 2, characterized in that: A surface of the rotating column (906) close to the second bevel gear (905) is a conical tooth surface, the first bevel gear (901) is located between the second bevel gear (905) and the rotating column (906), and the first bevel gear (901) is meshed with the second bevel gear (905) and the rotating column (906) respectively.

4. A modified esterification reaction kettle according to claim 2, characterized in that: The rack rod (909) is slidably connected to the U-shaped plate (904), and the rack rod (909) is meshed with the driven gear (910).

5. A modified esterification reactor according to claim 1, characterized in that: A second compression spring (24) is fixedly mounted on the surface of one end of the second channel (19) located inside the first outer ring plate (8); a second compression spring (24) is also fixedly mounted on the surface of one end of the first channel (18) located inside the second outer ring plate (33); a second baffle (25) is fixedly mounted on one end of the second compression spring (24); a limiting plate (26) is fixedly mounted on the lower surface of the second baffle (25); limiting grooves (27) are provided on the surfaces of both the first channel (18) and the second channel (19); and the limiting plate (26) is slidably mounted in the limiting grooves (27).

6. A modified esterification reactor according to claim 1, characterized in that: The inner rotating rod (12) is also provided with a first channel (18) and a second channel (19) which are the same as those of the outer rotating rod (13); the top end of the first channel (18) on the inner rotating rod (12) passes through the circumference of the inner rotating rod (12) and is located above the first inner ring plate (16), and the bottom end passes through the circumference of the inner rotating rod (12) and is located inside the second inner ring plate (34); the top end of the second channel (19) on the inner rotating rod (12) passes through the circumference of the inner rotating rod (12) and is located inside the first inner ring plate (16), and the bottom end passes through the bottom of the outer inner rotating rod (12).

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