CN210021213U

CN210021213U - Crude product distillation still for producing 2, 3-difluoro-5-chloropyridine

Info

Publication number: CN210021213U
Application number: CN201920782870.7U
Authority: CN
Inventors: 孔秋顺
Original assignee: Yicheng Hongxin Resin Co Ltd
Current assignee: Yicheng Hongxin Resin Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-07
Anticipated expiration: 2029-05-28

Abstract

The utility model discloses a 2, 3-difluoro-5-chloropyridine production usefulness crude stills, including a jar body, the top of jar body is provided with servo motor, and feed inlet and gas vent have been seted up at the top of jar body, and the relative servo motor of feed inlet and gas vent sets up symmetrically, and one side that servo motor is close to the feed inlet is provided with the backup pad, and backup pad fixed connection is at the top of jar body, and servo motor passes through fixed frame fixed connection on the siding wall of backup pad, the beneficial effects of the utility model are that: this stills simple structure, convenient to use scrapes the pole through the arc that sets up with jar internal bottom looks adaptation for when servo motor drives the pivot and rotates, the pole can be rotated along with the pivot is scraped to the arc, thereby clears up the interior bottom of jar body, reduction in production cost, and the utility model discloses stills can be so that distillation efficiency improves greatly through setting up heating coil and the stirring vane in jar internal portion.

Description

Crude product distillation still for producing 2, 3-difluoro-5-chloropyridine

Technical Field

The utility model relates to a negative pressure stills technical field specifically is a crude stills of 2, 3-difluoro-5-chloropyridine production usefulness.

Background

The distillation still is a still used for distillation in chemical production. The 2, 3-difluoro-5-chloropyridine is produced into the finished product by using 2,3, 5-trichloropyridine and through the steps of addition reaction, intermediate separation, ring-closing reaction, extraction, water washing, alkali washing, toluene recovery, finished product distillation, waste water treatment, waste gas absorption and the like. Wherein the finished product distillation is to distill the crude product to obtain a qualified product by using a distillation kettle. The existing distillation still can be attached with a large amount of finished product powder on the wall of the bottom in the tank body after distillation, and is not convenient to take out, so that the production cost is improved, and the efficiency of the existing distillation still is lower when heating is carried out, so that the distillation efficiency is slow.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a crude stills of 2, 3-difluoro-5-chloropyridine production usefulness to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a crude product distillation still for producing 2, 3-difluoro-5-chloropyridine comprises a tank body, wherein a servo motor is arranged above the tank body, a feed inlet and an exhaust outlet are formed in the top of the tank body, the feed inlet and the exhaust outlet are symmetrically arranged relative to the servo motor, a supporting plate is arranged on one side, close to the feed inlet, of the servo motor, the supporting plate is fixedly connected to the top of the tank body, the servo motor is fixedly connected to the plate wall of the supporting plate through a fixing frame, a rotating shaft is fixedly connected to the shaft wall of an output shaft of the servo motor through a shaft coupling, the other end of the rotating shaft penetrates through the tank body and extends into the tank body, two shaft sleeves are fixedly connected to the shaft wall of one end, extending to the inner side of the tank body, of the rotating shaft is fixedly connected to the side wall of the excircle side, arrange and be provided with the seal valve on the pipe wall of material pipe, the fixed intercommunication of the one end that the jar body was kept away from to the gas vent has first connecting pipe, the other end of first connecting pipe is provided with the evacuation pump, the input and the first connecting pipe of evacuation pump are connected, the evacuation pump passes through mount fixed connection on the lateral wall of the jar body, the output of evacuation pump is connected with the second connecting pipe, the one end that the evacuation pump was kept away from to the second connecting pipe is provided with storage jar, just the second connecting pipe communicates with storage jar is fixed, the inside of the jar body is provided with heating coil.

Preferably, the below of pivot is provided with the arc and scrapes the pole, the equal fixedly connected with connecting rod in both ends at pole top is scraped to the arc, two the other end of connecting rod all with the axle wall fixed connection of pivot, the pole is scraped with the interior bottom phase-match of the jar body to set up and sliding connection to the arc.

Preferably, the shaft wall of the shaft far away from one end of the coupler is rotatably connected with a sleeve, the side wall of the excircle side of the sleeve is fixedly connected with a support frame, and the other end of the support frame is fixedly connected with the inner wall of the tank body.

Preferably, the servo motor, the vacuum pumping pump and the heating coil are all electrically connected with an external power supply.

Preferably, the axial lead of the stirring blade during rotation coincides with the axial lead of the heating coil, and the diameter of the inner circle of the heating coil is larger than that of the stirring blade.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model relates to a 2, the crude stills of 5 chloropyridine production usefulness of 3-difluoro simple structure, convenient to use scrapes the pole through the arc that sets up with jar internal bottom looks adaptation for servo motor is when driving the pivot and rotate, and the pole can be rotated along with the pivot is scraped to the arc, thereby clears up the internal bottom of jar, reduction in production cost, and the utility model discloses stills can make distillation efficiency improve greatly through setting up at internal heating coil and the stirring vane of jar.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the middle heating coil of the present invention.

In the figure: 1. a tank body; 2. a servo motor; 3. a feed inlet; 4. an exhaust port; 5. a support plate; 6. fixing the frame; 7. a coupling; 8. a rotating shaft; 9. a shaft sleeve; 10. a stirring blade; 11. a sleeve; 12. a support frame; 13. a connecting rod; 14. an arc-shaped scraping rod; 15. a discharge pipe; 16. a sealing valve; 17. a first connecting pipe; 18. a vacuum pump is pumped; 19. a fixed mount; 20. a second connecting pipe; 21. storing the tank; 22. a heating coil.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a crude product distillation kettle for producing 2, 3-difluoro-5-chloropyridine comprises a tank body 1, a servo motor 2 is arranged above the tank body 1, a feed inlet 3 and an exhaust outlet 4 are arranged at the top of the tank body 1, the feed inlet 3 and the exhaust outlet 4 are symmetrically arranged relative to the servo motor 2, a support plate 5 is arranged at one side of the servo motor 2 close to the feed inlet 3, the support plate 5 is fixedly connected at the top of the tank body 1, the servo motor 2 is fixedly connected on the plate wall of the support plate 5 through a fixed frame 6, a rotating shaft 8 is fixedly connected on the shaft wall of an output shaft of the servo motor 2 through a shaft coupling 7, the other end of the rotating shaft 8 penetrates through the tank body 1 and extends into the tank body 1, two shaft sleeves 9 are fixedly connected on the shaft wall of one end of the rotating shaft 8 extending into the tank body 1, and, the bottom of the tank body 1 is fixedly communicated with a material discharging pipe 15, a sealing valve 16 is arranged on the pipe wall of the material discharging pipe 15, one end, away from the tank body 1, of the exhaust port 4 is fixedly communicated with a first connecting pipe 17, the other end of the first connecting pipe 17 is provided with a vacuum pumping pump 18, the input end of the vacuum pumping pump 18 is connected with the first connecting pipe 17, the vacuum pumping pump 18 is fixedly connected onto the outer side wall of the tank body 1 through a fixing frame 19, the output end of the vacuum pumping pump 18 is connected with a second connecting pipe 20, one end, away from the vacuum pumping pump 18, of the second connecting pipe 20 is provided with a storage tank 21, the second connecting pipe 20 is fixedly.

The below of pivot 8 is provided with the arc and scrapes pole 14, and the equal fixedly connected with connecting rod 13 in both ends at pole 14 top is scraped to the arc, the other end of two connecting rods 13 all with the axle wall fixed connection of pivot 8, the arc scrape the interior bottom phase-match of pole 14 and jar body 1 and set up and sliding connection for the arc scrapes pole 14 and can be with jar body 1 separation of adnexed finished product on the internal diapire of body 1 when rotating.

The pivot 8 is kept away from and is rotated on the axle wall of 7 one ends of shaft coupling and be connected with sleeve 11, fixedly connected with support frame 12 on the lateral wall of sleeve 11 excircle side, the other end of support frame 12 and jar inner wall fixed connection of body 1 for it is more stable when pivot 8 rotates.

The servo motor 2, the vacuum pumping pump 18 and the heating coil 22 are all electrically connected with an external power supply, so that the device can be driven normally.

The axis of rotation of the stirring vanes 10 coincides with the axis of the heating coil 22, and the diameter of the inner circle of the heating coil 22 is larger than the diameter of the stirring vanes 10.

Specifically, when the utility model is used, the sealing valve 16 is closed, the crude product to be distilled is conveyed to the inside of the tank body 1 through the feed inlet 3, the external power supply is used for starting the vacuum pump 18, the vacuum pump 18 pumps out the air in the tank body 1, so that the inside of the tank body 1 is in a negative pressure state, the external power supply is used for starting the servo motor 2 and the heating coil 22, the servo motor 2 is connected with the power supply and then drives the rotating shaft 8 to rotate, the rotating shaft 8 can drive the stirring blades 10 to rotate, the heating coil 22 heats the crude product in the tank body 1, the boiling point difference between the mixed material and the material is increased by utilizing the pressure change, thereby being beneficial to the separation of various materials, the purity of the fractionated product is high, the mixture in the tank body 1 can be stirred when the stirring blades 10 rotate, the mixture is heated more uniformly, the vacuum pumping pump 18 continuously pumps out gas generated after the mixture in the tank body 1 is heated, so that the interior of the tank body 1 is kept in a negative pressure state, due to pressure reduction, the boiling point is reduced, energy is saved, consumption is reduced, the pumped gas is stored in the storage tank 21, after distillation is completed, the heating coil 22 is closed, after a finished product in the tank body 1 is cooled, the vacuum pumping pump 18 is closed, the sealing valve 16 is opened, the finished product in the tank body 1 is discharged out of the tank body 1 through the discharging pipe 15, when the servo motor 2 drives the rotating shaft 8 to rotate, the connecting rod 13 on the shaft wall of the rotating shaft 8 rotates along with the rotation of the rotating shaft 8, the connecting rod 13 can drive the arc-shaped scraping rod 14 to clean the inner bottom wall of the tank body 1 when rotating, and the.

In the description of the present invention, it is to be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "one side", "top", "inner", "front", "center", "both ends", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second", "third", "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby the features defined as "first", "second", "third", "fourth" may explicitly or implicitly include at least one such feature.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A crude product distillation kettle for producing 2, 3-difluoro-5-chloropyridine is characterized by comprising a tank body (1), wherein a servo motor (2) is arranged above the tank body (1), a feed inlet (3) and an exhaust port (4) are formed in the top of the tank body (1), the feed inlet (3) and the exhaust port (4) are symmetrically arranged relative to the servo motor (2), a support plate (5) is arranged on one side, close to the feed inlet (3), of the servo motor (2), the support plate (5) is fixedly connected to the top of the tank body (1), the servo motor (2) is fixedly connected to the plate wall of the support plate (5) through a fixed rack (6), a rotating shaft (8) is fixedly connected to the shaft wall of an output shaft of the servo motor (2) through a coupler (7), and the other end of the rotating shaft (8) penetrates through the tank body (1) and extends to the inside of the tank body (1), the utility model discloses a vacuum pump, including pivot (8), fixed connection has two axle sleeves (9) on extending to the axle wall of the inside one end of jar body (1), fixedly connected with a plurality of stirring vane (10) on the lateral wall of axle sleeve (9) excircle side, the fixed intercommunication in bottom of the jar body (1) has row material pipe (15), be provided with seal valve (16) on arranging the pipe wall of material pipe (15), the fixed intercommunication in one end that the jar body (1) was kept away from in gas vent (4) has first connecting pipe (17), the other end of first connecting pipe (17) is provided with evacuation pump (18), the input and the first connecting pipe (17) of evacuation pump (18) are connected, evacuation pump (18) are through mount (19) fixed connection on the lateral wall of the jar body (1), the output of evacuation pump (18) is connected with second connecting pipe (20), the one end that evacuation pump (18) were kept away from in second connecting pipe (20) is provided with, and the second connecting pipe (20) is fixedly communicated with the storage tank (21), and a heating coil (22) is arranged in the tank body (1).

2. The distillation still for producing crude 2, 3-difluoro-5-chloropyridine of claim 1, wherein: the below of pivot (8) is provided with the arc and scrapes pole (14), the equal fixedly connected with connecting rod (13) in both ends at pole (14) top is scraped to the arc, two the other end of connecting rod (13) all with the axle wall fixed connection of pivot (8), the arc is scraped the interior bottom phase-match of pole (14) and jar body (1) and is set up and sliding connection.

3. The distillation still for producing crude 2, 3-difluoro-5-chloropyridine of claim 1, wherein: the shaft coupling is characterized in that a sleeve (11) is rotatably connected to the shaft wall of one end, away from the shaft coupling (7), of the rotating shaft (8), a support frame (12) is fixedly connected to the side wall of the outer circle side of the sleeve (11), and the other end of the support frame (12) is fixedly connected with the inner wall of the tank body (1).

4. The distillation still for producing crude 2, 3-difluoro-5-chloropyridine of claim 1, wherein: the servo motor (2), the vacuum pumping pump (18) and the heating coil (22) are all electrically connected with an external power supply.

5. The distillation still for producing crude 2, 3-difluoro-5-chloropyridine of claim 1, wherein: the axial lead when stirring vane (10) rotates coincides with the axial lead of heating coil (22), and the diameter of circle in heating coil (22) is greater than the diameter of stirring vane (10).