Recrystallization extraction equipment for producing 5, 5-dimethylhydantoin

Abstract

The utility model discloses recrystallization extraction equipment for producing 5, 5-dimethyl hydantoin, and particularly relates to the technical field of purification and crystallization of heterocyclic compounds, the recrystallization extraction equipment comprises a working platform, the middle part of the upper end of the working platform is fixedly provided with an up-down through reaction kettle, the top wall of the reaction kettle is in a rightward inclined shape, and the top wall of the reaction kettle is provided with a water inlet and a water outlet; a vertically-through mixing barrel is fixedly installed on the right portion of the upper end of the working platform, a first connecting pipe inclining rightwards is jointly arranged between the upper portion of the outer surface of the reaction kettle and the upper portion of the outer surface of the mixing barrel, and a second connecting pipe is jointly arranged between the lower end of the reaction kettle and the lower portion of the outer surface of the mixing barrel. According to the recrystallization extraction equipment for producing the 5, 5-dimethyl hydantoin, waste liquid in the reaction kettle can enter the mixing barrel again to be recycled, waste heat can be utilized to preheat a solvent, the load of electric heating is reduced, and therefore the electric energy consumption is reduced, the raw material cost is saved, and the waste liquid discharge is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of purification and crystallization of heterocyclic compounds, in particular to a recrystallization extraction device for producing 5,5-dimethylhydantoin. Background Art

[0002] 5,5-Dimethylhydantoin is an organic compound, a white crystalline solid, commonly used in organic synthesis and anticorrosion fields. In the production of 5,5-dimethylhydantoin, recrystallization extraction equipment plays a key role. The recrystallization equipment purifies the target substance in the solvent through the crystallization process, removes impurities, and improves the purity of the product.

[0003] Chinese patent document CN217246877U discloses a dimethylhydantoin purification crystallization kettle, including a mounting base plate, a control panel is arranged on one side of the top of the mounting base plate, a reactor is arranged in the middle of the top of the mounting base plate, a feed port, a motor box, a temperature display and a heating pipe are arranged at the top of the reactor in sequence, a heater is arranged at the bottom of the end of the heating pipe away from the reactor, and the heater is fixed to the top of the mounting base plate, the bottom end of the output shaft of the motor box passes through the reactor and is movably connected to the stirring assembly, and a discharge pipe is arranged at the bottom of the reactor; columns are arranged around the top of the mounting base plate, and a protective device matching the reactor is arranged between several columns. The utility model can fix the reactor through the protective device, reduce the vibration generated by the reactor, and increase the service life of the reactor. At the same time, the protective device can also prevent others from directly touching the reactor, thereby reducing the occurrence of dangerous accidents.

[0004] However, in actual use, the waste liquid generated by the device will be discharged directly, wasting a lot of heat energy. Utility Model Content

[0005] The main purpose of the utility model is to provide a recrystallization extraction device for producing 5,5-dimethylhydantoin, which can effectively solve the problems raised in the background technology.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A recrystallization extraction device for producing 5,5-dimethylhydantoin comprises a working platform, wherein the four corners of the lower end of the working platform are fixedly mounted with first supporting legs for support, a reactor penetrating up and down is fixedly mounted in the middle of the upper end of the working platform, the top wall of the reactor is inclined to the right, a mixing barrel penetrating up and down is fixedly mounted in the upper right end of the working platform, a plurality of second supporting legs for support are arranged at the lower part of the outer surface of the mixing barrel, a first connecting pipe inclined to the right is arranged between the upper part of the outer surface of the reactor and the upper part of the outer surface of the mixing barrel, a second connecting pipe is arranged between the lower end of the reactor and the lower part of the outer surface of the mixing barrel, the overall contour of the second connecting pipe is inclined to the right, and a solenoid valve is arranged inside the second connecting pipe.

[0008] Preferably, a high-frequency electric furnace is fixedly installed on the left upper end of the working platform, a heating jacket is fixedly installed on the outer surface of the reactor, and a heating coil connected to the high-frequency electric furnace is arranged inside the heating jacket.

[0009] Preferably, a water pump is provided on the right side of the rear upper end of the working platform, the output end of the water pump is connected to the upper part of the inner cavity of the reactor, and the input end of the water pump is connected to the lower part of the inner cavity of the mixing barrel.

[0010] Preferably, a condenser is sleeved on the outer surface of the first connecting pipe, and a condenser is also provided at the rear upper end of the working platform. The condenser is connected to the condenser, and the condenser is located on the left side of the water pump.

[0011] Preferably, a mounting frame is fixedly installed on the inner surface of the reactor, a rotating shaft 1 penetrating from top to bottom is rotatably installed on the upper end of the mounting frame, a motor is installed on the upper end through a bracket, the output end of the motor is fixedly connected to the rotating shaft 1, a rectangular frame is fixedly installed on the middle part of the outer surface of the rotating shaft 1, a plurality of stirring paddles are jointly installed between the inner surface of the rectangular frame and the outer surface of the rotating shaft 1, scrapers are provided at both left and right ends of the rectangular frame, and a filter plate is provided at the lower end of the second connecting pipe.

[0012] Preferably, the lower portion of the outer surface of the reactor is conical, and the lower portion of the outer surface of the reactor is connected to the middle portion of the outer surface of the reactor by threads.

[0013] Preferably, a rotating shaft 2 is rotatably installed on the upper end of the mixing barrel and passes through the upper and lower parts. A belt assembly is provided between the rotating shaft 2 and the rotating shaft 1. A stirring blade is fixedly installed on the outer surface of the rotating shaft 2 located in the mixing barrel. A feeding port which can be opened and closed manually is provided at the upper end of the mixing barrel.

[0014] Preferably, a drain valve is provided at the lower end of the mixing barrel.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] When the extraction equipment is working, the waste liquid in the reactor will flow into the mixing barrel for recycling in two ways: on the one hand, the gas volatilized in the reactor will liquefy into the liquid and flow to the right along the top wall of the reactor and the first connecting pipe into the mixing barrel, or drip back into the reactor for retention; on the other hand, when the solenoid valve in the second connecting pipe is opened, the waste liquid retained at the bottom of the reactor will be discharged into the mixing barrel, mixed with the newly added raw materials, and re-dissolved and crystallized. Since a certain amount of heat is retained in the waste liquid, the waste heat can be used to preheat the solvent, reducing the load of electric heating, thereby reducing power consumption, which also helps to save raw material costs and reduce waste liquid emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the structure of the overall front side of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall rear side structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the overall internal structure of the utility model;

[0020] Figure 4 For the utility model Figure 3 A is an enlarged view of the figure.

[0021] In the figure: 1. working platform; 2. first supporting leg; 3. reaction kettle; 4. high-frequency electric furnace; 5. heating jacket; 6. mixing barrel; 7. motor; 8. belt assembly; 9. condenser; 10. condenser tube; 11. second supporting leg; 12. drain valve; 13. second connecting pipe; 14. water pump; 31. rotating shaft 1; 32. rectangular frame; 33. stirring paddle; 34. mounting frame; 35. filter plate; 36. scraper; 61. rotating shaft 2; 62. feeding port; 63. stirring blade. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] like Figure 1-Figure 4As shown, the utility model provides a technical solution: comprising a working platform 1, the four corners of the lower end of the working platform 1 are fixedly installed with first supporting legs 2 for support, the middle part of the upper end of the working platform 1 is fixedly installed with a reactor 3 penetrating from top to bottom, when working, 5,5-dimethylhydantoin is recrystallized in the reactor 3, the top wall of the reactor 3 is inclined to the right, and the upper right part of the working platform 1 is fixedly installed with a mixing barrel 6 penetrating from top to bottom, the raw materials for generating 5,5-dimethylhydantoin will be stirred in the mixing barrel 6, and the waste liquid produced in the reactor 3 will be discharged back into the mixing barrel 6 A plurality of second supporting legs 11 for support are provided at the lower part of the outer surface of the mixing barrel 6, a first connecting pipe inclined to the right is provided between the upper part of the outer surface of the reactor 3 and the upper part of the outer surface of the mixing barrel 6, a second connecting pipe 13 is provided between the lower end of the reactor 3 and the lower part of the outer surface of the mixing barrel 6, the overall contour of the second connecting pipe 13 is inclined to the right, and an electromagnetic valve is provided inside the second connecting pipe 13, when the electromagnetic valve inside the second connecting pipe 13 is opened, the waste liquid at the bottom of the inner cavity of the reactor 3 will flow rightward along the second connecting pipe 13 into the mixing barrel 6.

[0024] Since the top wall of the reactor 3 is tilted to the right, and the first connecting pipe is also tilted to the right, and the temperature in the mixing barrel 6 is lower, the gas volatilized in the reactor 3 will liquefy into the liquid and flow to the right along the top wall of the reactor 3 and the first connecting pipe into the mixing barrel 6, or drip back into the reactor 3 and be retained.

[0025] Furthermore, a water pump 14 is provided on the right side of the upper rear end of the working platform 1, the output end of the water pump 14 is connected to the upper part of the inner cavity of the reactor 3, and the input end of the water pump 14 is connected to the lower part of the inner cavity of the mixing barrel 6. When the water pump 14 is working, it will draw the mixed solvent in the mixing barrel 6 into the reactor 3.

[0026] In addition, a high-frequency electric furnace 4 is fixedly installed on the left upper end of the working platform 1, and a heating sleeve 5 is fixedly installed on the outer surface of the reactor 3. The interior of the heating sleeve 5 is provided with a heating coil connected to the high-frequency electric furnace 4. The high-frequency electric furnace 4 is a prior art. When the high-frequency electric furnace 4 is working, a high-frequency large current flows to the heating coil wound into a ring or other shape, which will generate a strong magnetic flux with instantaneous polarity change in the coil. When a heated object such as metal is placed in the coil, these magnetic fluxes will penetrate the entire heated object. Therefore, the material of the reactor 3 needs to be metal. Therefore, when the high-frequency electric furnace 4 is working, the heating coil in the heating sleeve 5 will continuously heat the reactor 3, so that the solvent in the reactor 3 will continue to react and form 5,5-dimethylhydantoin crystals.

[0027] Furthermore, a condenser 10 is sleeved on the outer surface of the first connecting pipe, and a condenser 9 is also provided at the upper rear part of the working platform 1. The condenser 10 is connected to the condenser 9, and the condenser 9 is located on the left side of the water pump 14. The condenser 9 is a prior art. Through the principle of a heat exchanger, the condensed water circulates in the condenser 10 and contacts with the first connecting pipe, thereby further reducing the temperature in the first connecting pipe, accelerating the liquefaction of the high-temperature gas flowing through it, and causing it to form a liquid state after flowing into the mixing barrel 6.

[0028] Specifically, a mounting frame 34 is fixedly installed on the inner surface of the reactor 3, and a rotating shaft 31 penetrating from top to bottom is rotatably installed on the upper end of the mounting frame 34. A motor 7 is installed on the upper end of the reactor 3 through a bracket, and the output end of the motor 7 is fixedly connected to the rotating shaft 31. A rectangular frame 32 is fixedly installed in the middle of the outer surface of the rotating shaft 31. A plurality of stirring paddles 33 are commonly installed between the inner surface of the rectangular frame 32 and the outer surface of the rotating shaft 31. Scrapers 36 are provided at both ends of the rectangular frame 32. Therefore, when the motor 7 is working, it will drive the rotating shaft 31 to rotate continuously, so that the rectangular frame 32, the stirring paddle 33 and the scraper 36 rotate continuously. The liquid in the reactor 3 is continuously volatilized. When the stirring paddle 33 rotates, the liquid in the reactor 3 is kept sufficiently uniform, and the scraper 36 scrapes off the crystals on the inner surface of the reactor 3. A filter plate 35 is provided at the lower end of the second connecting pipe 13. Since the solvent is continuously volatilized, and the solvent in the reactor 3 is saturated, the scraped crystals will be filtered by 35 and accumulated on the filter plate 35.

[0029] like Figure 4 As shown, the lower portion of the outer surface of the reactor 3 is conical, and the lower portion of the outer surface of the reactor 3 is connected to the middle portion of the outer surface of the reactor 3 by threads. Therefore, when the device stops running, the user can open the reactor 3 to take out the produced 5,5-dimethylhydantoin.

[0030] Further, such as Figure 3 As shown, the upper end of the mixing barrel 6 is rotatably mounted with a rotating shaft 2 61 that passes through from top to bottom, and a belt assembly 8 is provided between the rotating shaft 2 61 and the rotating shaft 1 31. The outer surface of the rotating shaft 2 61 located in the mixing barrel 6 is fixedly mounted with a stirring blade 63, so when the motor 7 is working, it will also drive the rotating shaft 2 61 to rotate continuously, so that the stirring blade 63 can rotate continuously to initially stir and mix the solvent in the mixing barrel 6. The upper end of the mixing barrel 6 is provided with a manually opened and closed feeding port 62, which is convenient for users to put in raw materials.

[0031] In addition, a drain valve 12 is provided at the lower end of the mixing barrel 6 to facilitate the discharge of waste liquid at the end of the final work.

[0032] The working principle of the utility model is as follows: when the extraction device is working, the user first puts the raw materials in through the feeding port 62, starts the motor 7, and when the motor 7 is working, it drives the rotating shaft 2 61 to rotate continuously, so that the stirring blade 63 rotates continuously to initially stir and mix the solvent in the mixing barrel 6;

[0033] At this time, the high-frequency electric furnace 4 and the water pump 14 are started. When the water pump 14 is working, the mixed solvent in the mixing barrel 6 is pumped into the reactor 3. When the high-frequency electric furnace 4 is working, the heating coil in the heating sleeve 5 continuously heats the reactor 3, so that the solvent in the reactor 3 continuously reacts. When the motor 7 is working, it drives the rotating shaft 1 31 to continuously rotate, so that the rectangular frame 32, the stirring paddle 33 and the scraper 36 continuously rotate, and the liquid in the reactor 3 continuously reacts and volatilizes. When the stirring paddle 33 rotates, the liquid in the reactor 3 is kept sufficiently uniform, and the scraper 36 scrapes off the crystals on the inner surface of the reactor 3 to form 5,5-dimethylhydantoin crystals.

[0034] The waste liquid in the reactor 3 will flow into the mixing barrel 6 for recycling in two ways: one is that the gas volatilized in the reactor 3 will liquefy into the liquid and then flow to the right along the top wall of the reactor 3 and the first connecting pipe into the mixing barrel 6, or drip back into the reactor 3 for retention; the other is that when the solenoid valve in the second connecting pipe 13 is opened, the waste liquid retained at the bottom of the reactor 3 will be discharged into the mixing barrel 6, mixed with the newly added raw materials, and re-dissolved and crystallized. Therefore, the waste heat of the waste liquid can be used to preheat the solvent, reducing the load of electric heating, thereby reducing power consumption.

[0035] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A recrystallization extraction device for producing 5,5-dimethylhydantoin, comprising a working platform (1), characterized in that: The four corners of the lower end of the working platform (1) are all fixedly mounted with first supporting legs (2) for support, the middle part of the upper end of the working platform (1) is fixedly mounted with a reaction kettle (3) penetrating from top to bottom, the top wall of the reaction kettle (3) is inclined to the right, the right part of the upper end of the working platform (1) is fixedly mounted with a mixing barrel (6) penetrating from top to bottom, the lower part of the outer surface of the mixing barrel (6) is provided with a plurality of second supporting legs (11) for support, the upper part of the outer surface of the reaction kettle (3) and the upper part of the outer surface of the mixing barrel (6) are jointly provided with a first connecting pipe inclined to the right, the lower end of the reaction kettle (3) and the lower part of the outer surface of the mixing barrel (6) are jointly provided with a second connecting pipe (13), the overall contour of the second connecting pipe (13) is inclined to the right, and a solenoid valve is provided inside the second connecting pipe (13).

2. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 1, characterized in that: A high-frequency electric furnace (4) is fixedly mounted on the left upper end of the working platform (1), a heating sleeve (5) is fixedly mounted on the outer surface of the reaction kettle (3), and a heating coil connected to the high-frequency electric furnace (4) is provided inside the heating sleeve (5).

3. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 2, characterized in that: A water pump (14) is provided on the right side of the rear upper end of the working platform (1), the output end of the water pump (14) is connected to the upper part of the inner cavity of the reaction kettle (3), and the input end of the water pump (14) is connected to the lower part of the inner cavity of the mixing barrel (6).

4. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 3, characterized in that: The outer surface of the first connecting pipe is sheathed with a condenser pipe (10), and a condenser (9) is also provided at the rear of the upper end of the working platform (1). The condenser pipe (10) is connected to the condenser (9), and the condenser (9) is located on the left side of the water pump (14).

5. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 4, characterized in that: A mounting frame (34) is fixedly mounted on the inner surface of the reaction kettle (3), a rotating shaft (31) penetrating from top to bottom is rotatably mounted on the upper end of the mounting frame (34), a motor (7) is mounted on the upper end of the reaction kettle (3) via a bracket, an output end of the motor (7) is fixedly connected to the rotating shaft (31), an upper end of the rotating shaft (31) is fixedly connected to the output end of the motor (7), a rectangular frame (32) is fixedly mounted on the middle part of the outer surface of the rotating shaft (31), a plurality of stirring paddles (33) are mounted between the inner surface of the rectangular frame (32) and the outer surface of the rotating shaft (31), scrapers (36) are provided at both left and right ends of the rectangular frame (32), and a filter plate (35) is provided at the lower end of the second connecting pipe (13).

6. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 5, characterized in that: The lower portion of the outer surface of the reaction kettle (3) is conical, and the lower portion of the outer surface of the reaction kettle (3) is connected to the middle portion of the outer surface of the reaction kettle (3) via threads.

7. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 6, characterized in that: A second rotating shaft (61) is rotatably mounted on the upper end of the mixing barrel (6) and passes through the mixing barrel from top to bottom. A belt assembly (8) is provided between the second rotating shaft (61) and the first rotating shaft (31). A stirring blade (63) is fixedly mounted on the outer surface of the second rotating shaft (61) located inside the mixing barrel (6). A manually openable and closable material feeding port (62) is provided on the upper end of the mixing barrel (6).

8. A recrystallization extraction device for producing 5,5-dimethylhydantoin according to claim 7, characterized in that: A liquid discharge valve (12) is provided at the lower end of the mixing barrel (6).

Images