Malonic acid hydrolysis and distillation integrated equipment

Abstract

The utility model discloses malonic acid hydrolysis and distillation integrated equipment which comprises a kettle body, the bottom end of the kettle body is fixedly connected with a plurality of supporting legs, the top end of the kettle body is fixedly connected with a supporting frame, the middle of the supporting frame is in sliding clamping connection with a movable shaft, the bottom end of the movable shaft is coaxially and rotatably connected with a transmission rotating shaft, and the transmission rotating shaft is in sliding clamping connection with a transmission cylinder. The transmission cylinder is rotationally connected with the top of the kettle body, the top end of the transmission cylinder is fixedly sleeved with an outer gear ring, one side of the outer gear ring is meshed with a gear, the gear is fixedly connected with one side of a double-output-shaft motor, the end part of the other side of the double-output-shaft motor is fixedly connected with a cylindrical cam, and the cylindrical cam is in transmission connection with a movable shaft; and the two sides of the bottom end of the transmission rotating shaft are fixedly connected with scraping plates respectively, and the scraping plates are movably arranged in the kettle body. The double-output-shaft motor drives the cylindrical cam to rotate circumferentially, the cylindrical cam drives the movable shaft to do linear reciprocating motion, and the movable shaft drives the transmission rotating shaft which is rotationally connected to do synchronous linear reciprocating lifting motion.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrolysis distillation of malonic acid, in particular to an integrated device for hydrolysis distillation of malonic acid. Background Technique

[0002] Malonic acid CH2(COOH)2, also known as carrot acid, beet acid, and malic acid, has a wide range of uses and is mainly used in pharmaceutical intermediates, essence and fragrance, resin adhesives, electroplating polishing agents, explosion control agents, thermal welding fluxes, etc.

[0003] The traditional production process is the hydrolysis of diethyl malonate method. For example, in the patent with the application number CN201811635068.1, the preparation method of diethyl methylmalonate provided by the present invention uses acid for cyano hydrolysis, and the process flow is simple; using an ethanol-thionyl chloride system for esterification can effectively avoid the use of toxic solvents and can improve the yield of the final product. According to the records of the examples, using the preparation method provided by the present invention, the yield of DEMM ≥ 62.5%, and the purity ≥ 98%.

[0004] Although the above patent can use acid for cyano hydrolysis and the process flow is simple, when the raw materials are put into the reaction kettle for mixing reaction, during the operation of the existing reaction kettle, the stirring rod inside it is fixed and unchanged, which is not convenient for stirring the raw materials at the bottom of the kettle, resulting in incomplete stirring and a lower reaction effect. Therefore, we propose an integrated device for hydrolysis distillation of malonic acid to solve the above problems. Content of the Utility Model

[0005] The purpose of the utility model is to provide an integrated device for hydrolysis distillation of malonic acid to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: An integrated device for hydrolysis distillation of malonic acid, including a kettle body, the bottom end of the kettle body is fixedly connected with a plurality of support legs, the top end of the kettle body is fixedly connected with a support frame, the middle part of the support frame is slidably clamped with a movable shaft, the bottom end of the movable shaft is coaxially rotatably connected with a transmission rotating shaft, the transmission rotating shaft is slidably clamped with a transmission cylinder, the transmission cylinder is rotatably connected to the top of the kettle body, the top end of the transmission cylinder is fixedly sleeved with an external gear ring, one side of the external gear ring is meshed with a gear, the gear is fixedly connected to one side of a double-output shaft motor, and the other end of the double-output shaft motor is fixedly connected with a cylindrical cam, and the cylindrical cam is connected to the movable shaft in a transmission manner;

[0007] Both sides of the bottom end of the transmission rotating shaft are fixedly connected with scraping plates, and the scraping plates are movably arranged inside the kettle body.

[0008] Preferably, the support frame is of an F-shaped structure.

[0009] Preferably, one side of the top end of the kettle body is fixedly connected with a feed pipe and a gas pipe respectively.

[0010] Preferably, a chute is concavely arranged on the arc-shaped outer wall of the cylindrical cam, the chute is arranged in communication from beginning to end, one side of the top end of the movable shaft is fixedly connected with a transmission slider, and the transmission slider is slidably arranged in the chute.

[0011] Preferably, limiting slide bars are respectively fixedly connected to both sides of the transmission rotating shaft, and the limiting slide bars are slidably clamped with the transmission cylinder.

[0012] Preferably, a plurality of stirring cross bars are fixedly connected to the bottom of the transmission rotating shaft, the stirring cross bars are movably arranged in the kettle body, and the stirring cross bars are arranged in a circumferentially uniform manner.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows: The cylindrical cam is driven by a double-output shaft motor to rotate circumferentially, the cylindrical cam drives the movable shaft to make a linear reciprocating movement, the movable shaft drives the rotationally connected transmission rotating shaft to synchronously make a linear reciprocating lifting movement, thereby driving the fixedly connected scraper to move synchronously. Under the driving of the external tooth ring of the gear, the transmission rotating shaft rotates, and the transmission rotating shaft drives the scraper to rotate circumferentially in cooperation with the stirring cross bars, so as to stir and mix the raw materials inside the kettle body, and the scraper scrapes and turns over the bottom of the kettle body, improving the reaction effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic structural diagram of the present utility model;

[0015] Figure 2 is a schematic sectional structural diagram of the present utility model.

[0016] In the figure: kettle body 1, support leg 2, support frame 3, double-output shaft motor 4, cylindrical cam 5, chute 51, gear 6, external tooth ring 7, transmission cylinder 8, transmission rotating shaft 9, limiting slide bar 91, stirring cross bar 92, scraper 93, movable shaft 10, transmission slider 101, feed pipe 11, gas pipe 12. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0018] Embodiment 1

[0019] Refer to Figure 1 、 2, which is the first embodiment of the present utility model. This embodiment provides an integrated equipment for the hydrolysis and distillation of malonic acid, including a kettle body 1. A plurality of support legs 2 are fixedly connected to the bottom end of the kettle body 1. A support frame 3 is fixedly connected to the top end of the kettle body 1. The middle part of the support frame 3 is slidably clamped with a movable shaft 10. The bottom end of the movable shaft 10 is coaxially rotatably connected to a transmission rotating shaft 9. The transmission rotating shaft 9 is slidably clamped with a transmission cylinder 8. The transmission cylinder 8 is rotatably connected to the top of the kettle body 1. An external tooth ring 7 is fixedly sleeved on the top end of the transmission cylinder 8. One side of the external tooth ring 7 is meshed and connected with a gear 6. The gear 6 is fixedly connected to one side of a double-output shaft motor 4. The other end of the double-output shaft motor 4 is fixedly connected with a cylindrical cam 5. The cylindrical cam 5 is in transmission connection with the movable shaft 10;

[0020] On both sides of the bottom end of the transmission rotating shaft 9, scraping plates 93 are respectively fixedly connected. The scraping plates 93 are movably arranged inside the kettle body 1. Raw materials are conveyed into the kettle body 1 through a feed pipe 11. Then, the conveying pipeline of the feed pipe 11 is closed through a valve. The double-output shaft motor 4 works. The double-output shaft motor 4 drives the fixedly connected gear 6 to rotate. The gear 6 drives the meshed and connected external tooth ring 7 to rotate. The external tooth ring 7 drives the fixedly sleeved transmission cylinder 8 to rotate circumferentially. The transmission cylinder 8 drives the slidably clamped transmission rotating shaft 9 to rotate circumferentially. The transmission rotating shaft 9 drives the fixedly connected stirring cross bar 92 to rotate synchronously in a circle. The stirring cross bar 92 stirs the raw materials inside the kettle body 1. At the same time, the transmission rotating shaft 9 drives the scraping plates 93 fixedly connected to the bottom end to rotate circumferentially. The scraping plates 93 stir the raw materials at the bottom inside the kettle body 1. At the same time, the double-output shaft motor 4 drives the cylindrical cam 5 to rotate circumferentially. The cylindrical cam 5 cooperates with a transmission slider 101 through a chute 51. The movable shaft 10 is slidably matched with the support frame 3 through a vertical slide bar fixedly connected to one side, so that the movable shaft 10 realizes reciprocating lifting and lowering work. The movable shaft 10 drives the transmission rotating shaft 9 rotatably connected to the bottom end to realize reciprocating lifting and lowering work. The transmission rotating shaft 9 drives the stirring cross bar 92 to work synchronously. While the stirring cross bar 92 stirs the inside of the kettle body 1, it agitates the raw materials. At the same time, the scraping plates 93 are of an arc-shaped structure and cooperate with the bottom wall of the kettle body 1. Therefore, when the transmission rotating shaft 9 reciprocates in lifting and lowering, the scraping plates 93 intermittently contact the bottom wall of the kettle body 1, thereby stirring and turning over the raw materials at the bottom of the kettle body 1, improving the mixing effect of the raw materials. After the hydrolysis of the raw materials is completed, the gas inside the kettle body 1 is extracted through an air pipe 12 to perform vacuum hydrolysis on the raw materials inside the kettle body 1 and distill out the crude solution, which is convenient for subsequent processes.

[0021] Embodiment 2

[0022] Refer to Figure 1-2 , which is the second embodiment of the present utility model. This embodiment is based on the previous embodiment. Specifically, the support frame 3 is of an F-shaped structure, and the F-shaped structure facilitates the installation and fixation of each component.

[0023] Specifically, one side of the top end of the kettle body 1 is fixedly connected to a feed pipe 11 and a gas pipe 12 respectively. The raw materials are conveyed into the interior of the kettle body 1 through the feed pipe 11. A valve is fixedly installed on the feed pipe 11 to control the on-off of the conveyed raw materials. A valve is also installed on the gas pipe 12 to control the on-off of the gas pipeline.

[0024] Specifically, a chute 51 is concavely provided on the arc-shaped outer wall of the cylindrical cam 5. The chute 51 is arranged with its head and tail connected. One side of the top end of the movable shaft 10 is fixedly connected to a transmission slider 101, and the transmission slider 101 is slidably arranged in the chute 51.

[0025] Specifically, limiting slide bars 91 are fixedly connected to both sides of the transmission rotating shaft 9. The limiting slide bars 91 are slidably clamped to the transmission cylinder 8. The double-output shaft motor 4 drives the cylindrical cam 5 to rotate circumferentially. The cylindrical cam 5 cooperates with the transmission slider 101 through the chute 51, and the movable shaft 10 is slidably matched with the support frame 3 through the vertical slide bar fixedly connected to one side, so that the movable shaft 10 realizes reciprocating lifting and lowering work.

[0026] Specifically, a number of stirring cross bars 92 are fixedly connected to the bottom of the transmission rotating shaft 9. The stirring cross bars 92 are movably arranged in the kettle body 1 and are circumferentially and uniformly arranged. When the double-output shaft motor 4 works, the double-output shaft motor 4 drives the fixedly connected gear 6 to rotate. The gear 6 drives the engaged outer tooth ring 7 to rotate. The outer tooth ring 7 drives the fixedly sleeved transmission cylinder 8 to rotate circumferentially. The transmission cylinder 8 drives the slidably clamped transmission rotating shaft 9 to rotate circumferentially. The transmission rotating shaft 9 drives the fixedly connected stirring cross bars 92 to rotate synchronously in a circle. The stirring cross bars 92 stir the raw materials inside the kettle body 1. At the same time, the transmission rotating shaft 9 drives the scraping plate 93 fixedly connected to the bottom end to rotate circumferentially, and the scraping plate 93 stirs the raw materials at the bottom inside the kettle body 1.

[0027] Embodiment 3

[0028] Refer to Figure 1-2, which is the third embodiment of the present utility model. This embodiment is based on the above two embodiments. When in use, raw materials are transported into the kettle body 1 through the feed pipe 11, and then the transport pipeline of the feed pipe 11 is closed by a valve. The double-output shaft motor 4 operates, and the double-output shaft motor 4 drives the fixedly connected gear 6 to rotate. The gear 6 drives the meshing-connected external gear ring 7 to rotate. The external gear ring 7 drives the fixedly sleeved transmission cylinder 8 to rotate circumferentially. The transmission cylinder 8 drives the slidably clamped transmission rotating shaft 9 to rotate circumferentially. The transmission rotating shaft 9 drives the fixedly connected stirring cross bar 92 to rotate synchronously in a circle. The stirring cross bar 92 stirs the raw materials inside the kettle body 1. At the same time, the transmission rotating shaft 9 drives the scraping plate 93 fixedly connected to the bottom end to rotate circumferentially. The scraping plate 93 stirs the raw materials at the bottom inside the kettle body 1. At the same time, the double-output shaft motor 4 drives the cylindrical cam 5 to rotate circumferentially. The cylindrical cam 5 cooperates with the transmission slider 101 through the chute 51. The movable shaft 10 is slidably fitted with the support frame 3 through the vertical slide bar fixedly connected to one side, so that the movable shaft 10 realizes reciprocating lifting and lowering work. The movable shaft 10 drives the transmission rotating shaft 9 rotatably connected to the bottom end to realize reciprocating lifting and lowering work. The transmission rotating shaft 9 drives the stirring cross bar 92 to work synchronously. While the stirring cross bar 92 stirs the inside of the kettle body 1, it stirs the raw materials. At the same time, the scraping plate 93 is of an arc-shaped structure and cooperates with the bottom wall of the kettle body 1. Therefore, when the transmission rotating shaft 9 reciprocates in lifting and lowering, the scraping plate 93 intermittently contacts the bottom wall of the kettle body 1, thereby stirring and turning over the raw materials at the bottom of the kettle body 1, improving the mixing effect of the raw materials. After the hydrolysis of the raw materials is completed, the gas inside the kettle body 1 is extracted through the air pipe 12 to perform vacuum hydrolysis on the raw materials inside the kettle body 1 and distill out the crude solution, which is convenient for subsequent processes.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. An integrated device for hydrolysis and distillation of malonic acid, comprising a kettle (1), the bottom end of the kettle (1) being fixedly connected to a plurality of supporting legs (2), characterized in that: The top of the kettle body (1) is fixedly connected to the support frame (3), the middle of the support frame (3) is slidably connected to the movable shaft (10), the bottom end of the movable shaft (10) is coaxially connected to the transmission shaft (9), the transmission shaft (9) is slidably connected to the transmission cylinder (8), the transmission cylinder (8) is rotatably connected to the top of the kettle body (1), the top of the transmission cylinder (8) is fixedly sleeved with an external gear ring (7), one side of the external gear ring (7) is meshed with a gear (6), the gear (6) is fixedly connected to one side of a dual-output shaft motor (4), the other end of the dual-output shaft motor (4) is fixedly connected to a cylindrical cam (5), and the cylindrical cam (5) is transmission-connected to the movable shaft (10); Scrapers (93) are fixedly connected to both sides of the bottom end of the transmission shaft (9), and the scrapers (93) are movably arranged in the kettle body (1).

2. The integrated equipment for hydrolysis and distillation of malonic acid according to claim 1, characterized in that: The support frame (3) is an F-shaped structure.

3. The integrated equipment for hydrolysis and distillation of malonic acid according to claim 1, characterized in that: One side of the top end of the kettle body (1) is fixedly connected to a feed pipe (11) and an air pipe (12).

4. The integrated equipment for hydrolysis and distillation of malonic acid according to claim 1, characterized in that: A slide groove (51) is concavely provided in the arc-shaped outer wall of the cylindrical cam (5), and the slide groove (51) is connected end to end. The top end of the movable shaft (10) is fixedly connected to a transmission slider (101), and the transmission slider (101) is slidably arranged in the slide groove (51).

5. The integrated equipment for hydrolysis and distillation of malonic acid according to claim 1, characterized in that: The two sides of the transmission shaft (9) are respectively fixedly connected to limit slide bars (91), and the limit slide bars (91) are slidably engaged with the transmission cylinder (8).

6. The integrated equipment for hydrolysis and distillation of malonic acid according to claim 1, characterized in that: The bottom of the transmission shaft (9) is fixedly connected to a plurality of stirring cross bars (92), the stirring cross bars (92) are movably arranged in the kettle body (1), and the stirring cross bars (92) are evenly distributed around the circumference.

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