Mixing reaction kettle for preparing diethyl allylmalonate

Abstract

A mixing reaction kettle for preparing diethyl allymalonate relates to the technical field of chemical equipment, and comprises a horizontally arranged support table, the top of the support table is vertically and fixedly provided with a mixing reaction kettle body arranged in a penetrating manner, and the bottom of the mixing reaction kettle body is provided with an opening; a fixed circular plate which is coaxially arranged is fixedly arranged on the lower inner wall of the mixing reaction kettle body, a rotating circular plate which is rotationally and hermetically connected with the inner wall of the mixing reaction kettle body is coaxially arranged at the top of the fixed circular plate, the rotating circular plate and the fixed circular plate are in friction abutting, and a plurality of through circular grooves are uniformly distributed in the top of the rotating circular plate and the top of the fixed circular plate in the circumferential direction; a mixing mechanism is arranged in the mixing reaction kettle body and is positioned above the rotating circular plate. According to the reaction kettle, the problem that the distribution uniformity of allyl bromide in the existing reaction kettle for producing diethyl allymalonate is poor is solved; the problem of poor continuous handling of the reaction mixture is solved; the cleaning process of the filtering equipment is complicated.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a mixing reaction kettle for preparing diethyl allyl malonate. Background Art

[0002] Diethyl allylmalonate is an organic compound, a colorless liquid with a weak ethereal odor. Diethyl allylmalonate can be used as a solvent for paints, inks and varnishes.

[0003] When preparing diethyl allyl malonate, diethyl malonate, potassium carbonate and CH3CN are added to a mixed reaction kettle. The reaction mixture is stirred at room temperature, and then allyl bromide is slowly added to the reaction mixture. After the reaction is completed, the reaction mixture is filtered to obtain diethyl allyl malonate, which is a colorless liquid.

[0004] The existing reactor for the production of diethyl allyl malonate gradually exposed its shortcomings during use, mainly in the following aspects: First, the distribution uniformity of allyl bromide in the mixing reactor is poor. Specifically, when allyl bromide is added to the reaction mixture, a liquid adding valve is usually used to directly add it to the mixing reactor. Therefore, allyl bromide is unevenly distributed in the reaction mixture, and the contact effect between allyl bromide and the reaction mixture is poor, which leads to low preparation efficiency of diethyl allyl malonate.

[0005] Second, the continuous handling of the reaction mixture is poor. Specifically, the existing mixing reactor only has the function of mixing the reactants. After the reaction is completed, the reaction mixture needs to be transferred to a filtering device for filtration. The collection and transfer process of the reaction mixture increases the complexity of the preparation process. Therefore, the existing mixing reactor has poor continuous handling of the reaction mixture, resulting in a cumbersome preparation process.

[0006] Third, the cleaning process of the filter equipment is complicated. Specifically, when cleaning the solid matter trapped on the surface of the filter device, all the cleaned solid matter is inside the filter device. The staff needs to take the solid matter out of the device, so the cleaning process of the filter equipment is complicated.

[0007] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Summary of the invention

[0008] In view of the defects in the prior art, the technical problem to be solved by the present invention is to provide a mixed reactor for preparing diethyl allyl malonate, wherein the mixed reactor can uniformly add allyl bromide to the reaction mixture so that the allyl bromide is uniformly distributed in the reaction mixture, thereby improving the contact effect between the allyl bromide and the reaction mixture and improving the preparation efficiency of diethyl allyl malonate; The mixed reaction kettle has good continuous processing performance for the reaction mixture, and the reaction mixture can be directly filtered after the mixed reaction is completed, thereby simplifying the preparation process of diethyl allyl malonate; The mixing reactor can also automatically clean the trapped solid matter, and the cleaning process is simple.

[0009] To solve the above problems, the present invention provides the following technical solutions: A mixing reactor for preparing diethyl allyl malonate, comprising a horizontally arranged support platform, a mixing reactor body arranged through is vertically fixed on the top of the support platform, the bottom of the mixing reactor body is open, a coaxially arranged fixed circular plate is fixed on the lower inner wall of the mixing reactor body, a rotating circular plate is coaxially arranged on the top of the fixed circular plate and is rotatably sealed and connected to the inner wall of the mixing reactor body, the rotating circular plate and the fixed circular plate are frictionally abutted against each other, a plurality of circular grooves arranged through are uniformly distributed on the top of the rotating circular plate and the fixed circular plate along the circumferential direction, a mixing mechanism is arranged inside the mixing reactor body at a position above the rotating circular plate, a filtering assembly is arranged at a position below the mixing reactor body on the bottom of the support platform, and a packing valve connected to its inner cavity is arranged on the top of the mixing reactor body; The mixing mechanism comprises a lifting cylinder which is slidably and sealedly connected to the inner wall of the mixing reactor body, the upper inner wall of the lifting cylinder is fixedly provided with a coaxially arranged built-in circular plate, the bottom of the lifting cylinder is evenly distributed along the circumferential direction with a plurality of vertically arranged rotating tubes in the bottom of the lifting cylinder. The upper end of the rotating tube passes through the built-in circular plate and the lifting cylinder upwardly and is flush with the top of the lifting cylinder, and the lower end of the rotating tube passes through the lifting cylinder downwardly and is flush with the bottom of the lifting cylinder. The built-in circular plate and the lifting cylinder are both rotatably and sealedly connected with the rotating tube. The inner wall of the rotating tube is evenly distributed with a plurality of vertically arranged mixing blades in the circumferential direction, and the outer wall of the rotating tube is located below the built-in circular plate. A plurality of penetrating leakage holes are evenly distributed along the circumferential direction. A rotating circular plate which is rotatably arranged is coaxially provided at the bottom of the lifting cylinder. The rotating circular plate is frictionally abutted against the lifting cylinder, and a plurality of penetrating liquid passing grooves are evenly distributed on the top of the rotating circular plate. The diameter of the liquid passing groove is the same as the inner diameter of the rotating tube. A driving component for synchronously driving the plurality of rotating tubes is provided at a position above the built-in circular plate inside the lifting cylinder. A fixed cylinder is coaxially fixed to the top of the lifting cylinder, and a plurality of connecting tubes connected to the inner cavity of the fixed cylinder are evenly distributed along the circumferential direction on the outer wall of the fixed cylinder, and one of the ports of the connecting tubes passes downward through the lifting cylinder and the built-in circular plate, and a lower rotating tube is coaxially fixed to the top of the fixed cylinder, and the lower port of the lower rotating tube extends into the fixed cylinder and is connected to the fixed cylinder in a rotational sealing manner, and a connecting tube is coaxially fixed to the top of the mixing reactor body, and an upper rotating tube connected to the rotational sealing manner is coaxially arranged in the lower port of the connecting tube, and a transition tube is coaxially arranged between the upper rotating tube and the lower rotating tube, and the upper ports of the transition tube and the lower rotating tube extend upward into the upper rotating tube and the transition tube respectively and are correspondingly connected to the upper rotating tube and the transition tube with vertical sliding sealing, and a plurality of stirring blades are evenly distributed along the circumferential direction on the outer walls of the upper rotating tube, the transition tube and the lower rotating tube.

[0010] As an optimized solution, the filter assembly includes a driving column rotatably arranged along a plumb line, a horizontally arranged connecting plate is fixedly arranged at the bottom of the driving column, a horizontally arranged U-shaped plate is fixedly arranged at the end of the connecting plate, a driven tube is arranged inside the U-shaped plate, and the driven tube is rotatably connected to the U-shaped plate through two transmission rods, a lifting tube is slidably sleeved on the upper outer wall of the driven tube, an upper port of the lifting tube extends upward to the outside of the driven tube, the inner diameter of the lifting tube is the same as the inner diameter of the mixing reactor body, a conical filter plate is coaxially fixedly connected to the upper inner wall of the driven tube, a plurality of filter holes are uniformly distributed along the circumferential direction on the top of the conical filter plate, a rotatably arranged transmission shaft is coaxially arranged on the top of the conical filter plate, and a plurality of scrapers in frictional contact with the top of the conical filter plate are uniformly distributed along the circumferential direction on the outer wall of the transmission shaft, A vertically arranged arc-shaped support plate is fixedly disposed at the bottom of the support platform, and two horizontally fixed shielding plates are vertically arranged on the inner wall of the arc-shaped support plate.

[0011] As an optimized solution, the driving assembly includes a driven gear fixedly mounted on the outer wall of the rotating tube, a driving gear rotatably arranged coaxially on the top of the built-in circular plate, and a plurality of the driven gears are meshed with the driving gear.

[0012] As an optimized solution, an inner bottom of the lifting cylinder is coaxially fixed with an inner tube, the upper port of the inner tube is fixedly connected to the inner circular plate, the inner wall of the inner tube is coaxially fixed with a supporting circular plate, the top and bottom of the supporting circular plate are respectively provided with an upper control motor and a lower control motor that are fixedly arranged, the output end of the upper control motor passes upward through the inner circular plate and is fixedly connected to the driving gear, and the output end of the lower control motor passes downward through the lifting cylinder and is fixedly connected to the rotating circular plate.

[0013] As an optimized solution, two vertically sliding sliding blocks are evenly distributed along the circumference of the inner wall of the mixing reactor body, and the sliding blocks are fixedly connected to the lifting cylinder. Two single-thread screws arranged to rotate along the plumb line are arranged inside the mixing reactor body, and the single-thread screws vertically penetrate the sliding blocks and are threadedly connected to the sliding blocks. Two driving motors are fixedly provided on the top of the mixing reactor body, and the output ends of the driving motors pass through the mixing reactor body and are fixedly connected to the single-thread screws.

[0014] As an optimized solution, a transmission gear is fixedly mounted on the upper outer wall of the upper rotating tube, a driving gear that meshes with the transmission gear is rotatably provided on the inner top of the mixing reactor body, a speed regulating motor is fixedly mounted on the top of the mixing reactor body, and the output end of the speed regulating motor passes through the mixing reactor body and is fixedly connected to the driving gear.

[0015] As an optimized solution, the top of the driving column is rotatably connected to the bottom of the supporting platform, a stepper motor is fixedly provided on the top of the supporting platform, and the output end of the stepper motor passes through the supporting platform and is fixedly connected to the driving column.

[0016] As an optimized solution, a servo motor is fixedly provided at the end of the U-shaped plate, the output end of the servo motor passes through the U-shaped plate and is fixedly connected to one of the transmission rods, and two vertically arranged electric telescopic cylinders are evenly distributed along the circumference of the outer wall of the driven tube, and the telescopic end of the electric telescopic cylinder is fixedly connected to the lifting tube.

[0017] As an optimized solution, an upper protective cylinder with an opening at the top is coaxially fixed to the bottom of the fixed circular plate, an upper built-in motor is fixed in the upper protective cylinder, and the output end of the upper built-in motor passes through the fixed circular plate and is fixedly connected to the rotating circular plate.

[0018] As an optimized solution, a lower protective cylinder with an opening at the top is coaxially fixed to the bottom of the conical filter plate, a lower built-in motor is fixed in the lower protective cylinder, and the output end of the lower built-in motor passes through the conical filter plate and is fixedly connected to the transmission shaft.

[0019] Compared with the prior art, the present invention has the following beneficial effects: 1. When preparing diethyl allyl malonate, diethyl malonate, potassium carbonate and CH3CN are added to the mixing reactor body through the packing valve, the speed regulating motor drives the driving gear, the transmission gear and the upper rotating tube to rotate, and then drives the transition tube and the lower rotating tube to rotate, the stirring blade stirs the substances in the mixing reactor body, the driving motor drives the single-thread screw to rotate, and then drives the sliding block and the lifting cylinder to slide vertically, the reaction mixture in the mixing reactor body continuously passes through the rotating tube, at the same time, allyl bromide is pressurized by the booster pump and passed into the connecting tube, and allyl bromide passes through the upper rotating tube, the transition tube and the lower rotating tube in turn. Enter into the fixed cylinder and enter into the lifting cylinder through a plurality of connecting pipes. The allyl bromide in the lifting cylinder is discharged into the reaction mixture in the rotating cylinder through the leakage hole on the rotating tube. The upper control motor drives the driving gear, the driven gear, the rotating tube and the mixing blades to rotate. The rotating mixing blades can preliminarily mix the reaction mixture in the rotating tube with the discharged allyl bromide. During the vertical sliding process of the lifting cylinder, the allyl bromide can be uniformly added to the reaction mixture, so that the allyl bromide is uniformly distributed in the reaction mixture, thereby improving the contact effect between the allyl bromide and the reaction mixture and improving the preparation efficiency of diethyl allyl malonate; 2. After the reaction is completed, the stepper motor drives the driving column and the connecting plate to rotate, and then drives the U-shaped plate, the driven tube and the lifting tube to rotate until the lifting tube rotates to the bottom of the mixing reactor body, and the electric control telescopic cylinder drives the lifting tube to slide upward until it abuts against the lower port of the mixing reactor body, and the collecting container is placed under the driven tube. The upper built-in motor drives the rotating circular plate to rotate until the circular groove on the rotating circular plate overlaps with the circular groove on the fixed circular plate, and the reaction mixture passes through the rotating circular plate and the fixed circular plate in turn into the driven tube. The reaction mixture in the driven tube is filtered by the conical filter plate and then enters the collecting container for collection. During the filtration of the reaction mixture, the lower built-in motor drives the transmission shaft and the scraper to rotate. The rotating scraper can clean the solid matter accumulated on the surface of the conical filter plate, effectively preventing the filter hole from being blocked. It can be seen that the equipment has good continuous processing performance for the reaction mixture, and the reaction mixture after the mixed reaction is completed can be directly filtered, which simplifies the preparation process of diethyl allyl malonate; 3. During the filtration of the reaction mixture, the lower control motor drives the rotating circular plate to rotate until the liquid groove on the rotating circular plate and the lower port of the rotating tube are completely non-overlapping, and the driving motor drives the lifting cylinder to slide downward. Under the squeezing of the lifting cylinder, the reaction mixture is accelerated to pass through the conical filter plate, thereby accelerating the filtration speed of the reaction mixture; 4. When cleaning the solid matter accumulated on the surface of the conical filter plate, the stepper motor drives the U-shaped plate to rotate to the outside of the support platform, the servo motor drives the transmission rod, the driven tube and the lifting tube to rotate 180 degrees, and the lower built-in motor drives the scraper to rotate. The rotating scraper cleans the solid matter on the surface of the conical filter plate, and the cleaned solid matter falls down into the collection container, realizing the function of automatically cleaning the solid matter on the surface of the conical filter plate, and the cleaning process is simple; 5. After the reaction mixture is filtered, the stepper motor drives the U-shaped plate to rotate until the driven tube and the lifting tube are completely located between the two shielding plates. The two shielding plates respectively shield the upper port of the lifting tube and the lower port of the driven tube to prevent impurities from entering the driven tube and the lifting tube, thereby improving the practicability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0021] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of a fixed circular plate and a rotating circular plate of the present invention; Figure 3 It is a schematic diagram of the structure inside the lifting cylinder of the present invention; Figure 4 It is a schematic diagram of the structure of the filter assembly of the present invention; Figure 5 It is a schematic diagram of the structure inside the driven tube of the present invention; Figure 6 It is a schematic structural diagram of the present invention when cleaning the conical filter plate.

[0022] In the figure: 1-filter assembly; 2-support table; 3-sliding block; 4-mixing mechanism; 5-mixing reactor body; 6-single threaded rod; 7-driving motor; 8-filling valve; 9-transmission gear; 10-connecting pipe; 11-speed regulating motor; 12-driving gear; 13-upper rotating pipe; 14-transition pipe; 15-stirring blade; 16-lower rotating pipe; 17-fixed cylinder; 18-lifting cylinder; 19-stepping motor; 20-shielding plate; 21-arc support plate; 22-fixed circular plate; 23-rotating circular plate; 24-circular groove; 25-upper built-in motor; 26-upper protective cylinder; 27-rotating circular plate ; 28-mixing blade; 29-built-in circular plate; 30-rotating tube; 31-connecting tube; 32-driving gear; 33-driven gear; 34-built-in tube; 35-supporting circular plate; 36-leakage hole; 37-upper control motor; 38-lower control motor; 39-driving assembly; 40-liquid trough; 41-driven tube; 42-U-shaped plate; 43-transmission rod; 44-lifting tube; 45-electric telescopic cylinder; 46-servo motor; 47-conical filter plate; 48-scraper; 49-filter hole; 50-transmission shaft; 51-driving column; 52-connecting plate; 53-lower built-in motor; 54-lower protective tube. DETAILED DESCRIPTION

[0023] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0024] like Figures 1 to 6 As shown, a mixing reactor for preparing diethyl allyl malonate comprises a horizontally arranged support platform 2, a mixing reactor body 5 which is vertically fixed on the top of the support platform 2 and is arranged through, the bottom of the mixing reactor body 5 is arranged with an opening, a coaxially arranged fixed circular plate 22 is fixed on the lower inner wall of the mixing reactor body 5, a rotating circular plate 23 which is rotatably sealed and connected to the inner wall of the mixing reactor body 5 is coaxially arranged on the top of the fixed circular plate 22, the rotating circular plate 23 and the fixed circular plate 22 are frictionally abutted against each other, a plurality of circular grooves 24 which are arranged through are uniformly distributed on the top of the rotating circular plate 23 and the fixed circular plate 22 along the circumferential direction, a mixing mechanism 4 is arranged inside the mixing reactor body 5 at a position above the rotating circular plate 23, a filtering assembly 1 is arranged at the bottom of the support platform 2 at a position below the mixing reactor body 5, and a packing valve 8 which is connected to the inner cavity of the mixing reactor body 5 is arranged on the top of the mixing reactor body 5; The mixing mechanism 4 includes a lifting cylinder 18 which is slidably and sealably connected to the inner wall of the mixing reactor body 5. A coaxially arranged built-in circular plate 29 is fixedly arranged on the inner wall of the lifting cylinder 18. A plurality of vertically arranged rotating tubes 30 are evenly distributed along the circumferential direction on the inner bottom of the lifting cylinder 18. The upper end of the rotating tube 30 passes through the built-in circular plate 29 and the lifting cylinder 18 upward and is flush with the top of the lifting cylinder 18. The lower end of the rotating tube 30 passes through the lifting cylinder 18 downward and is flush with the bottom of the lifting cylinder 18. The built-in circular plate 29 and the lifting cylinder 18 are both rotatably and sealably connected to the rotating tube 30. The inner wall of the rotating tube 30 is circumferentially arranged. A plurality of vertically arranged mixing blades 28 are evenly distributed, a plurality of leakage holes 36 are evenly distributed along the circumferential direction on the outer wall of the rotating tube 30 below the built-in circular plate 29, a rotating circular plate 27 is coaxially arranged at the bottom of the lifting cylinder 18, the rotating circular plate 27 and the lifting cylinder 18 are frictionally abutted, a plurality of liquid-passing grooves 40 are evenly distributed along the circumferential direction on the top of the rotating circular plate 27, the diameter of the liquid-passing groove 40 is the same as the inner diameter of the rotating tube 30, a driving component 39 for synchronously driving the plurality of rotating tubes 30 is provided at a position above the built-in circular plate 29 inside the lifting cylinder 18, A fixed cylinder 17 is coaxially fixed on the top of the lifting cylinder 18, and a plurality of connecting pipes 31 connected to the inner cavity of the fixed cylinder 17 are evenly distributed on the outer wall of the fixed cylinder 17 along the circumferential direction. One of the ports of the connecting pipe 31 passes downward through the lifting cylinder 18 and the built-in circular plate 29. A lower rotating tube 16 is coaxially fixed on the top of the fixed cylinder 17. The lower port of the lower rotating tube 16 extends into the fixed cylinder 17 and is rotatably sealed and connected to the fixed cylinder 17. A connecting pipe 10 is coaxially fixed on the top of the mixing reactor body 5. An upper rotating tube 13 rotatably sealed and connected to the upper rotating tube 13 is coaxially provided in the lower port of the connecting tube 10. A transition tube 14 is coaxially provided between the upper rotating tube 13 and the lower rotating tube 16. The upper ports of the transition tube 14 and the lower rotating tube 16 extend upward into the upper rotating tube 13 and the transition tube 14 respectively and are correspondingly vertically slidably sealed and connected to the upper rotating tube 13 and the transition tube 14. The outer walls of the upper rotating tube 13, the transition tube 14 and the lower rotating tube 16 are evenly distributed with a plurality of stirring blades 15 along the circumferential direction.

[0025] The filter assembly 1 includes a driving column 51 rotatably arranged along a plumb line, a horizontally arranged connecting plate 52 is fixedly arranged at the bottom of the driving column 51, a horizontally arranged U-shaped plate 42 is fixedly arranged at the end of the connecting plate 52, a driven tube 41 is arranged inside the U-shaped plate 42, and the driven tube 41 is rotatably connected to the U-shaped plate 42 through two transmission rods 43, a lifting tube 44 is slidably sleeved on the upper outer wall of the driven tube 41, and the upper port of the lifting tube 44 extends upward to the outside of the driven tube 41, and the inner diameter of the lifting tube 44 is the same as the inner diameter of the mixing reactor body 5, and a conical filter plate 47 is coaxially fixedly connected to the upper inner wall of the driven tube 41, and a plurality of filter holes 49 are uniformly distributed along the circumferential direction on the top of the conical filter plate 47, and a rotatably arranged transmission shaft 50 is coaxially arranged on the top of the conical filter plate 47, and a plurality of scrapers 48 in friction contact with the top of the conical filter plate 47 are uniformly distributed along the circumferential direction on the outer wall of the transmission shaft 50, A vertically arranged arc-shaped support plate 21 is fixedly disposed at the bottom of the support platform 2 , and two horizontally fixed shielding plates 20 are vertically arranged on the inner wall of the arc-shaped support plate 21 .

[0026] The driving assembly 39 includes a driven gear 33 fixedly mounted on the outer wall of the rotating tube 30 . A driving gear 32 is coaxially arranged to rotate on the top of the built-in circular plate 29 . A plurality of driven gears 33 are meshed with the driving gear 32 .

[0027] An internal tube 34 is coaxially fixed to the inner bottom of the lifting cylinder 18, the upper port of the internal tube 34 is fixedly connected to the internal circular plate 29, and a supporting circular plate 35 is coaxially fixed to the inner wall of the internal tube 34. An upper control motor 37 and a lower control motor 38 are fixedly arranged at the top and bottom of the supporting circular plate 35, respectively. The output end of the upper control motor 37 passes upward through the internal circular plate 29 and is fixedly connected to the driving gear 32, and the output end of the lower control motor 38 passes downward through the lifting cylinder 18 and is fixedly connected to the rotating circular plate 27.

[0028] Two vertically sliding sliding blocks 3 are evenly distributed along the circumferential direction on the inner wall of the mixing reactor body 5, and the sliding blocks 3 are fixedly connected to the lifting cylinder 18. Two single-thread screws 6 are arranged to rotate along the plumb line inside the mixing reactor body 5, and the single-thread screws 6 vertically penetrate the sliding blocks 3 and are threadedly connected to the sliding blocks 3. Two driving motors 7 are fixedly provided on the top of the mixing reactor body 5, and the output ends of the driving motors 7 pass through the mixing reactor body 5 and are fixedly connected to the single-thread screws 6.

[0029] The upper outer wall of the upper rotating tube 13 is fixedly sleeved with a transmission gear 9, the inner top of the mixing reactor body 5 is rotatably provided with a driving gear 12 meshing with the transmission gear 9, and the top of the mixing reactor body 5 is fixedly provided with a speed regulating motor 11, and the output end of the speed regulating motor 11 passes through the mixing reactor body 5 and is fixedly connected to the driving gear 12.

[0030] The top of the driving column 51 is rotatably connected to the bottom of the supporting platform 2 . A stepper motor 19 is fixedly provided on the top of the supporting platform 2 . The output end of the stepper motor 19 passes through the supporting platform 2 and is fixedly connected to the driving column 51 .

[0031] A servo motor 46 is fixedly disposed at the end of the U-shaped plate 42 , and an output end of the servo motor 46 passes through the U-shaped plate 42 and is fixedly connected to one of the transmission rods 43 .

[0032] Two vertically arranged electric-controlled telescopic cylinders 45 are evenly distributed along the circumferential direction on the outer wall of the driven tube 41 , and the telescopic ends of the electric-controlled telescopic cylinders 45 are fixedly connected to the lifting tube 44 .

[0033] An upper protective tube 26 with an opening at the top is coaxially fixed to the bottom of the fixed circular plate 22 . An upper built-in motor 25 is fixed in the upper protective tube 26 . The output end of the upper built-in motor 25 passes through the fixed circular plate 22 and is fixedly connected to the rotating circular plate 23 .

[0034] A lower protective tube 54 with an opening at the top is coaxially fixed to the bottom of the conical filter plate 47 . A lower built-in motor 53 is fixed in the lower protective tube 54 . The output end of the lower built-in motor 53 passes through the conical filter plate 47 and is fixedly connected to the transmission shaft 50 .

[0035] The working principle of this device is: When preparing diethyl allyl malonate, diethyl malonate, potassium carbonate and CH3CN are added to the mixing reactor body 5 through the filling valve 8, the speed regulating motor 11 drives the driving gear 12, the transmission gear 9 and the upper rotating tube 13 to rotate, and then drives the transition tube 14 and the lower rotating tube 16 to rotate, the stirring blade 15 stirs the substances in the mixing reactor body 5, the driving motor 7 drives the single-thread screw 6 to rotate, and then drives the sliding block 3 and the lifting cylinder 18 to slide vertically, and the reaction mixture in the mixing reactor body 5 continuously passes through the rotating tube 30. At the same time, allyl bromide is pressurized by the booster pump and passed into the connecting tube 10, and the allyl bromide passes through the upper rotating tube 13, the transition tube 14 and the lower rotating tube 16 in sequence. The allyl bromide in the lifting cylinder 18 is discharged into the reaction mixture in the rotating tube 30 through the leakage hole 36 on the rotating tube 30. The upper control motor 37 drives the driving gear 32, the driven gear 33, the rotating tube 30 and the mixing blade 28 to rotate. The rotating mixing blade 28 can preliminarily mix the reaction mixture in the rotating tube 30 with the discharged allyl bromide. During the vertical sliding process of the lifting cylinder 18, the allyl bromide can be uniformly added to the reaction mixture, so that the allyl bromide is uniformly distributed in the reaction mixture, thereby improving the contact effect between the allyl bromide and the reaction mixture and improving the preparation efficiency of diethyl allyl malonate. After the reaction is finished, the stepper motor 19 drives the driving column 51 and the connecting plate 52 to rotate, and then drives the U-shaped plate 42, the driven tube 41 and the lifting tube 44 to rotate, until the lifting tube 44 rotates to the bottom of the mixing reactor body 5, and the electric control telescopic cylinder 45 drives the lifting tube 44 to slide upward until it abuts against the lower end of the mixing reactor body 5, and the collecting container is placed under the driven tube 41. The upper built-in motor 25 drives the rotating circular plate 23 to rotate until the circular groove 24 on the rotating circular plate 23 overlaps with the circular groove 24 on the fixed circular plate 22, and the reaction mixture passes through the rotating circular plate 23 and the fixed circular plate 22 in sequence. The fixed circular plate 22 enters into the driven tube 41, and the reaction mixture in the driven tube 41 enters into the collecting container for collection after being filtered by the conical filter plate 47. During the filtering process of the reaction mixture, the lower built-in motor 53 drives the transmission shaft 50 and the scraper 48 to rotate. The rotating scraper 48 can clean the solid matter accumulated on the surface of the conical filter plate 47, effectively preventing the filter hole 49 from being blocked. It can be seen that the equipment has good continuous processing performance for the reaction mixture, and the reaction mixture after the mixed reaction is completed can be directly filtered, which simplifies the preparation process of diethyl allyl malonate; During the filtration of the reaction mixture, the lower control motor 38 drives the rotating circular plate 27 to rotate until the liquid-passing groove 40 on the rotating circular plate 27 and the lower end of the rotating tube 30 are completely non-overlapping, and the driving motor 7 drives the lifting cylinder 18 to slide downward. Under the squeezing of the lifting cylinder 18, the reaction mixture is accelerated to pass through the conical filter plate 47, thereby accelerating the filtration speed of the reaction mixture; When cleaning the solid matter accumulated on the surface of the conical filter plate 47, the stepper motor 19 drives the U-shaped plate 42 to rotate to the outside of the support platform 2, the servo motor 46 drives the transmission rod 43, the driven tube 41 and the lifting tube 44 to rotate 180 degrees, and the lower built-in motor 53 drives the scraper 48 to rotate. The rotating scraper 48 cleans the solid matter on the surface of the conical filter plate 47, and the cleaned solid matter falls downward into the collection container, thereby realizing the function of automatically cleaning the solid matter on the surface of the conical filter plate 47, and the cleaning process is simple; After the reaction mixture is filtered, the stepper motor 19 drives the U-shaped plate 42 to rotate until the driven tube 41 and the lifting tube 44 are completely located between the two shielding plates 20. The two shielding plates 20 respectively block the upper port of the lifting tube 44 and the lower port of the driven tube 41 to prevent impurities from entering the driven tube 41 and the lifting tube 44, thereby improving the practicability of the equipment.

[0036] Finally, it should be noted that 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A mixed reactor for the preparation of diethyl allyl malonate, characterized in that: The invention comprises a support platform (2) arranged horizontally, a mixing reactor body (5) is vertically fixedly provided on the top of the support platform (2) and is penetrated by the mixing reactor body (5), the bottom of the mixing reactor body (5) is open, a coaxially arranged fixed circular plate (22) is fixedly provided on the lower inner wall of the mixing reactor body (5), a rotating circular plate (23) is coaxially provided on the top of the fixed circular plate (22) and is rotatably sealed and connected to the inner wall of the mixing reactor body (5), the rotating circular plate (23) and the fixed circular plate (22) are frictionally abutted against each other, a plurality of penetrating circular grooves (24) are uniformly distributed on the tops of the rotating circular plate (23) and the fixed circular plate (22) along the circumferential direction, a mixing mechanism (4) is provided inside the mixing reactor body (5) at a position above the rotating circular plate (23), a filtering assembly (1) is provided on the bottom of the support platform (2) at a position below the mixing reactor body (5), and a packing valve (8) is provided on the top of the mixing reactor body (5) and is communicated with its inner cavity; The mixing mechanism (4) comprises a lifting cylinder (18) which is slidably and sealably connected to the inner wall of the mixing reactor body (5); a coaxially arranged built-in circular plate (29) is fixedly provided on the upper inner wall of the lifting cylinder (18); a plurality of vertically arranged rotating tubes (30) are evenly distributed along the circumferential direction on the inner bottom of the lifting cylinder (18); the upper end of the rotating tube (30) passes through the built-in circular plate (29) and the lifting cylinder (18) upwards and is flush with the top of the lifting cylinder (18); the lower end of the rotating tube (30) passes through the lifting cylinder (18) downwards and is flush with the bottom of the lifting cylinder (18); the built-in circular plate (29) and the lifting cylinder (18) are both rotatably and sealably connected to the rotating tube (30); the inner wall of the rotating tube (30) A plurality of vertically arranged mixing blades (28) are evenly distributed along the circumferential direction; a plurality of liquid leakage holes (36) are evenly distributed along the circumferential direction on the outer wall of the rotating tube (30) at a position below the built-in circular plate (29); a rotating circular plate (27) is coaxially arranged at the bottom of the lifting cylinder (18); the rotating circular plate (27) and the lifting cylinder (18) are frictionally abutted against each other; a plurality of liquid-passing grooves (40) are evenly distributed along the circumferential direction on the top of the rotating circular plate (27); the diameter of the liquid-passing grooves (40) is the same as the inner diameter of the rotating tube (30); a driving component (39) for synchronously driving the plurality of rotating tubes (30) is provided at a position above the built-in circular plate (29) inside the lifting cylinder (18); A fixed cylinder (17) is coaxially fixed on the top of the lifting cylinder (18); a plurality of connecting tubes (31) are evenly distributed along the circumferential direction on the outer wall of the fixed cylinder (17) and are in communication with the inner cavity thereof; one of the ports of the connecting tubes (31) passes downward through the lifting cylinder (18) and the built-in circular plate (29); a lower rotating tube (16) is coaxially fixed on the top of the fixed cylinder (17); the lower port of the lower rotating tube (16) extends into the fixed cylinder (17) and is rotatably sealed and connected to the fixed cylinder (17); a connecting tube (31) is coaxially fixed on the top of the mixing reactor body (5) and is arranged to penetrate the fixed cylinder (17); 10), an upper rotating tube (13) is coaxially arranged in the lower end of the connecting tube (10) and is rotatably sealed therewith, a transition tube (14) is coaxially arranged between the upper rotating tube (13) and the lower rotating tube (16), the upper ends of the transition tube (14) and the lower rotating tube (16) respectively extend upward into the upper rotating tube (13) and the transition tube (14) and are correspondingly connected to the upper rotating tube (13) and the transition tube (14) in a vertical sliding sealing manner, and the outer walls of the upper rotating tube (13), the transition tube (14) and the lower rotating tube (16) are uniformly provided with a plurality of stirring blades (15) along the circumferential direction.

2. The mixed reactor for preparing diethyl allyl malonate according to claim 1, characterized in that: The filter assembly (1) comprises a driving column (51) rotatably arranged along a plumb line, a horizontally arranged connecting plate (52) being fixedly arranged at the bottom of the driving column (51), a horizontally arranged U-shaped plate (42) being fixedly arranged at the end of the connecting plate (52), a driven tube (41) being arranged inside the U-shaped plate (42), the driven tube (41) being rotatably connected to the U-shaped plate (42) via two transmission rods (43), a lifting tube (44) being slidably sleeved on the upper outer wall of the driven tube (41), and the upper end of the lifting tube (44) being fixedly arranged at the bottom of the driving column (51). The port extends upward to the outside of the driven tube (41); the inner diameter of the lifting tube (44) is the same as the inner diameter of the mixing reactor body (5); a conical filter plate (47) is coaxially fixedly connected to the upper inner wall of the driven tube (41); a plurality of filter holes (49) are uniformly distributed along the circumferential direction on the top of the conical filter plate (47); a transmission shaft (50) is coaxially provided on the top of the conical filter plate (47) for rotation; a plurality of scrapers (48) are uniformly distributed along the circumferential direction on the outer wall of the transmission shaft (50) for frictional contact with the top of the conical filter plate (47); A vertically arranged arc-shaped support plate (21) is fixedly provided at the bottom of the support platform (2), and two horizontally fixed shielding plates (20) are vertically arranged on the inner wall of the arc-shaped support plate (21).

3. The mixed reactor for preparing diethyl allyl malonate according to claim 1, characterized in that: The driving assembly (39) comprises a driven gear (33) fixedly sleeved on the outer wall of the rotating tube (30), a driving gear (32) rotatably arranged coaxially on the top of the built-in circular plate (29), and a plurality of the driven gears (33) are meshed with the driving gear (32).

4. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 3, characterized in that: An internal tube (34) is coaxially fixedly connected to the inner bottom of the lifting cylinder (18), an upper port of the internal tube (34) is fixedly connected to the internal circular plate (29), an inner wall of the internal tube (34) is coaxially fixedly connected to a supporting circular plate (35), and an upper control motor (37) and a lower control motor (38) are fixedly arranged at the top and bottom of the supporting circular plate (35), respectively, an output end of the upper control motor (37) passes upward through the internal circular plate (29) and is fixedly connected to the driving gear (32), and an output end of the lower control motor (38) passes downward through the lifting cylinder (18) and is fixedly connected to the rotating circular plate (27).

5. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 1, characterized in that: The inner wall of the mixing reactor body (5) is evenly distributed along the circumference with two sliding blocks (3) arranged to slide vertically. The sliding blocks (3) are fixedly connected to the lifting cylinder (18). Two single-thread screws (6) arranged to rotate along a plumb line are arranged inside the mixing reactor body (5). The single-thread screws (6) vertically penetrate the sliding blocks (3) and are threadedly connected to the sliding blocks (3). Two driving motors (7) are fixedly arranged on the top of the mixing reactor body (5). The output ends of the driving motors (7) pass through the mixing reactor body (5) and are fixedly connected to the single-thread screws (6).

6. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 1, characterized in that: A transmission gear (9) is fixedly sleeved on the upper outer wall of the upper rotating tube (13); a driving gear (12) meshing with the transmission gear (9) is rotatably provided on the inner top of the mixing reactor body (5); a speed regulating motor (11) is fixedly provided on the top of the mixing reactor body (5); an output end of the speed regulating motor (11) passes through the mixing reactor body (5) and is fixedly connected to the driving gear (12).

7. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 2, characterized in that: The top of the driving column (51) is rotatably connected to the bottom of the support platform (2), a stepping motor (19) is fixedly provided on the top of the support platform (2), and an output end of the stepping motor (19) passes through the support platform (2) and is fixedly connected to the driving column (51).

8. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 2, characterized in that: A servo motor (46) is fixedly provided at the end of the U-shaped plate (42); an output end of the servo motor (46) passes through the U-shaped plate (42) and is fixedly connected to one of the transmission rods (43); two vertically arranged electric-controlled telescopic cylinders (45) are evenly distributed along the circumferential direction on the outer wall of the driven tube (41); and the telescopic ends of the electric-controlled telescopic cylinders (45) are fixedly connected to the lifting tube (44).

9. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 1, characterized in that: An upper protective tube (26) having an opening at the top is coaxially fixedly connected to the bottom of the fixed circular plate (22), an upper built-in motor (25) is fixedly arranged in the upper protective tube (26), and an output end of the upper built-in motor (25) passes through the fixed circular plate (22) and is fixedly connected to the rotating circular plate (23).

10. The mixed reaction kettle for preparing diethyl allyl malonate according to claim 2, characterized in that: A lower protective cylinder (54) having an opening at the top is coaxially fixedly connected to the bottom of the conical filter plate (47), a lower built-in motor (53) is fixedly arranged in the lower protective cylinder (54), and an output end of the lower built-in motor (53) passes through the conical filter plate (47) and is fixedly connected to the transmission shaft (50).

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