CN215538532U

CN215538532U - Rectification condensing equipment is used in production of 2-chlorine-5-trifluoromethyl pyridine

Info

Publication number: CN215538532U
Application number: CN202122278571.XU
Authority: CN
Inventors: 查志雄
Original assignee: Shanxian Xinrun Chemical Co ltd
Current assignee: Shanxian Xinrun Chemical Co ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-01-18
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine, which comprises a reaction kettle, wherein a rectification tower is arranged on one side of the reaction kettle, a condensing mechanism is arranged on one side of the rectification tower, the condensing mechanism comprises a condensing box, the top of the condensing box is fixedly connected with a top cover through screws, one side of the inner wall of the condensing box is fixedly connected with a water inlet pipeline, the other side of the inner wall of the condensing box is fixedly connected with a water outlet pipeline, the condensing box is internally provided with a condensing pipeline, and two ends of the bottom of the condensing pipeline are fixedly connected with upper flange plates. According to the condenser, the top cover is detached, and the screws on the upper flange plate and the lower flange plate are screwed off, so that the connection between the condensation pipeline and the water inlet pipeline and the connection between the condensation pipeline and the water outlet pipeline can be rapidly cancelled, the condensation pipeline can be conveniently replaced by workers.

Description

Rectification condensing equipment is used in production of 2-chlorine-5-trifluoromethyl pyridine

Technical Field

The utility model relates to the technical field of chemical production equipment, in particular to a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine.

Background

2-chlorine-5-chloromethyl pyridine is an important pesticide and a medical intermediate, is an important raw material for synthesizing high-efficiency low-toxicity pesticide imidacloprid, at present, the industrial production in China mostly adopts dicyclic cracking, and the dicyclic cracking is carried out by hydrolysis, alkali washing and water washing, and then enters a desolventizing section, and the content of a 2-chlorine-5-chloromethyl pyridine crude product from the desolventizing section is only about 90 percent, and further rectification and purification are needed.

The present rectification condensing equipment on the market mostly all uses traditional integral type condenser, uses the back for a long time, and condenser pipeline inner wall forms scaling easily, influences the normal flow of cooling water, causes the jam of condenser even, and its integral type structure is not convenient for the staff and dismantles the maintenance, can lead to its condensing efficiency to descend in the long term.

Therefore, it is necessary to invent a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine, which aims to solve the problems that most of the existing rectification condensing devices on the market in the technology use the traditional integrated condenser, after long-time use, the inner wall of the pipeline of the condenser is easy to form scale deposit, the normal flow of cooling water is influenced, even the condenser is blocked, the integrated structure is inconvenient for workers to disassemble and maintain, and the condensing efficiency is reduced over time.

In order to achieve the above purpose, the utility model provides the following technical scheme: a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine comprises a reaction kettle, wherein a rectifying tower is arranged on one side of the reaction kettle, a condensing mechanism is arranged on one side of the rectifying tower and comprises a condensing box, the top of the condensing box is fixedly connected with a top cover through screws, a water inlet pipeline is fixedly connected on one side of the inner wall of the condensing box, a water outlet pipeline is fixedly connected on the other side of the inner wall of the condensing box, a condensing pipeline is arranged in the condensing box, upper flanges are fixedly connected at two ends of the bottom of the condensing pipeline, connecting pipes are fixedly connected on one sides of the water inlet pipeline and the water outlet pipeline, lower flanges are fixedly connected at the top of the connecting pipes, the two upper flanges are respectively matched with the two lower flanges, the upper flanges are fixedly connected with the lower flanges through screws, one end of the water inlet pipeline penetrates through the condensing box and is fixedly connected with a water inlet joint, one end of the water outlet pipeline penetrates through the condensation tank and is fixedly connected with a water outlet joint.

Preferably, one side of the top of the reaction kettle is fixedly connected with an inlet pipe, the bottom of the reaction kettle is fixedly connected with a first discharging pipe, and the bottom of the rectifying tower is fixedly connected with a second discharging pipe.

Preferably, one side of the top of the reaction kettle is fixedly connected with a first air duct, one end of the first air duct is communicated with the inside of the rectifying tower, one side of the top of the rectifying tower is fixedly connected with a second air duct, and one end of the second air duct is communicated with the inside of the condensing box.

Preferably, the bottom of the condensing box is fixedly connected with a delivery pipe, the bottom of the delivery pipe is fixedly connected with a gas-liquid separator, and the bottom of the gas-liquid separator is fixedly connected with a third discharge pipe.

Preferably, a third air duct is fixedly connected to one side of the delivery pipe, one end of the third air duct is communicated with the inside of the rectifying tower, a cavity is formed in the inner wall of the reaction kettle, and a heating coil is arranged in the cavity in a coiled mode.

Preferably, reation kettle top fixedly connected with driving motor, the inside (mixing) shaft that is equipped with of reation kettle, the (mixing) shaft top runs through reation kettle and is connected with driving motor output shaft transmission, (mixing) shaft fixed surface is connected with the stirring leaf.

In the technical scheme, the utility model provides the following technical effects and advantages:

1. the top cover at the top of the condensation box is detached, and the screws on the upper flange plate and the lower flange plate are screwed off, so that the connection between the condensation pipeline and the water inlet pipeline and the water outlet pipeline can be rapidly cancelled, the condensation pipeline can be conveniently replaced by workers;

2. drive (mixing) shaft and stirring leaf through driving motor output shaft and rotate, and then drive the crude in the reation kettle and flow for crude in the reation kettle can thermally equivalent, is favorable to improving the gasification efficiency of crude.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a sectional view showing the construction of a condensation tank according to the present invention;

FIG. 3 is a schematic view of the structure of the water inlet pipe and the water outlet pipe of the present invention;

FIG. 4 is a schematic diagram of a condensing circuit according to the present invention;

FIG. 5 is a sectional view of the reactor of the present invention.

Description of reference numerals:

1. a reaction kettle; 2. a rectifying tower; 3. a condenser tank; 4. a top cover; 5. a water inlet pipeline; 6. a water outlet pipeline; 7. a condensing pipeline; 8. an upper flange plate; 9. a connecting pipe; 10. a lower flange plate; 11. a water inlet joint; 12. a water outlet joint; 13. a feed pipe; 14. a first discharging pipe; 15. a second discharge pipe; 16. a first air duct; 17. a second air duct; 18. a delivery pipe; 19. a gas-liquid separator; 20. a third discharge pipe; 21. a third air duct; 22. a cavity; 23. a heating coil; 24. a drive motor; 25. a stirring shaft; 26. stirring the leaves.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The utility model provides a rectification condensing device for producing 2-chloro-5-trifluoromethylpyridine, which comprises a reaction kettle 1, wherein a rectifying tower 2 is arranged on one side of the reaction kettle 1, a condensing mechanism is arranged on one side of the rectifying tower 2, the condensing mechanism comprises a condensing box 3, the top of the condensing box 3 is fixedly connected with a top cover 4 through screws, one side of the inner wall of the condensing box 3 is fixedly connected with a water inlet pipeline 5, the other side of the inner wall of the condensing box 3 is fixedly connected with a water outlet pipeline 6, a condensing pipeline 7 is arranged in the condensing box 3, two ends of the bottom of the condensing pipeline 7 are fixedly connected with upper flange plates 8, one sides of the water inlet pipeline 5 and the water outlet pipeline 6 are fixedly connected with a connecting pipe 9, the top of the connecting pipe 9 is fixedly connected with lower flange plates 10, and the two upper flange plates 8 are respectively matched with the two lower flange plates 10, the upper flange plate 8 is fixedly connected with the lower flange plate 10 through screws, one end of the water inlet pipeline 5 penetrates through the condensation box 3 and is fixedly connected with a water inlet joint 11, and one end of the water outlet pipeline 6 penetrates through the condensation box 3 and is fixedly connected with a water outlet joint 12.

Further, in above-mentioned technical scheme, 1 top one side fixedly connected with inlet pipe 13 of reation kettle, 1 bottom fixedly connected with of reation kettle 14 expects the pipe, 2 bottom fixedly connected with second of rectifying column are arranged and are managed 15, and first row of material pipe 14 is convenient for discharge the discarded object in reation kettle 1, and the second is arranged and is managed 15 and is convenient for discharge the discarded object in rectifying column 2.

Further, in above-mentioned technical scheme, 1 top one side fixedly connected with first air duct 16 of reation kettle, first air duct 16 one end is linked together with 2 inside rectifying column, 2 top one side fixedly connected with second air duct 17 of rectifying column, second air duct 17 one end is linked together with the condenser box 3 is inside, and first air duct 16 is convenient for carry out the rectification with the leading-in rectifying column 2 of the crude product of gasification in, and second air duct 17 is convenient for carry out the condensation in leading-in condenser box 3 with the gas after the rectification.

Further, in the above technical scheme, a discharge pipe 18 is fixedly connected to the bottom of the condensation tank 3, a gas-liquid separator 19 is fixedly connected to the bottom of the discharge pipe 18, a third discharge pipe 20 is fixedly connected to the bottom of the gas-liquid separator 19, the gas-liquid separator 19 is convenient for separating condensed liquid from part of gas which is not liquefied, and the third discharge pipe 20 is convenient for discharging condensed 2-chloro-5-trifluoromethylpyridine finished product.

Further, in above-mentioned technical scheme, delivery tube 18 one side fixedly connected with third air duct 21, third air duct 21 one end is linked together with rectifying column 2 is inside, cavity 22 has been seted up to reation kettle 1 inner wall, the inside coiling of cavity 22 is provided with heating coil 23, and third air duct 21 is convenient for carry out the rectification with partial not yet liquefied gas reintroduction rectifying column 2 in, is favorable to improving finished product purity.

Further, in above-mentioned technical scheme, 1 top fixedly connected with driving motor 24 of reation kettle, 1 inside (mixing) shaft 25 that is equipped with of reation kettle, (mixing) shaft 25 top run through reation kettle 1 and with driving motor 24 output shaft transmission connection, (mixing) shaft 25 fixed surface is connected with stirring leaf 26, stirs the crude product in reation kettle 1 through stirring leaf 26, can make the crude product in reation kettle 1 can the thermally equivalent.

This practical theory of operation:

referring to the attached drawings 1-5 of the specification, when the device is used, a condensing mechanism is pre-cooled, a water inlet joint 11 and a water outlet joint 12 are respectively connected with an output end and an input end of an external cooling water circulation device, cooling water is input into a condensing pipeline 7 through the external cooling water circulation device, then a 2-chloro-5-trifluoromethyl pyridine crude product is injected into a reaction kettle 1 through a feeding pipe 13, a heating coil 23 is started to heat the crude product in the reaction kettle 1, after the crude product is heated and gasified, mixed gas enters a rectifying tower 2 from a first gas guide pipe 16 and enters the top of the tower from bottom to top, then enters a condensing box 3 through a second gas guide pipe 17, the 2-chloro-5-trifluoromethyl pyridine rate in the mixed gas is firstly condensed into liquid, and the rest mixed gas enters the rectifying tower 2 again through a third gas guide pipe 21, liquefied 2-chloro-5-trifluoromethylpyridine enters a third discharge pipe 20 through a discharge pipe 18 and a gas-liquid separator 19, so that collection by workers is facilitated, after the condensation mechanism is used for a long time, a top cover 4 at the top of a condensation box 3 is detached, screws on an upper flange 8 and a lower flange 10 are unscrewed, the connection between a condensation pipeline 7 and a water inlet pipeline 5 and a water outlet pipeline 6 can be rapidly cancelled, the condensation pipeline 7 can be conveniently replaced by the workers, and the condensation mechanism is different from an integrated structure of a traditional condenser, can be detached and maintained, reduces maintenance cost and is beneficial to improving the condensation efficiency of the device;

referring to the attached drawings 1-5 of the specification, when the device is used, the crude product is heated, the driving motor 24 is started, the output shaft of the driving motor 24 drives the stirring shaft 25 and the stirring blades 26 to rotate, and then the crude product in the reaction kettle 1 is driven to flow, so that the crude product in the reaction kettle 1 can be uniformly heated, and the gasification efficiency of the crude product is improved.

The standard parts used in the utility model can be purchased from the market, the special-shaped parts can be customized according to the description of the specification and the accompanying drawings, the specific connection mode of each part adopts conventional means such as bolts, rivets, welding and the like mature in the prior art, the machines, the parts and equipment adopt conventional models in the prior art, and the circuit connection adopts the conventional connection mode in the prior art, so that the detailed description is omitted.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the utility model can be made, and equivalents and modifications of some features of the utility model can be made without departing from the spirit and scope of the utility model.

Claims

1. A rectification condensing equipment is used in 2-chlorine-5-trifluoromethyl pyridine production, includes reation kettle (1), its characterized in that: the reaction kettle comprises a reaction kettle body (1), a rectifying tower (2) is arranged on one side of the reaction kettle body (1), a condensing mechanism is arranged on one side of the rectifying tower body (2), the condensing mechanism comprises a condensing box (3), the top of the condensing box (3) is fixedly connected with a top cover (4) through screws, a water inlet pipeline (5) is fixedly connected on one side of the inner wall of the condensing box (3), a water outlet pipeline (6) is fixedly connected on the other side of the inner wall of the condensing box (3), a condensing pipeline (7) is arranged in the condensing box (3), upper flange plates (8) are fixedly connected at two ends of the bottom of the condensing pipeline (7), a connecting pipe (9) is fixedly connected on one side of the water inlet pipeline (5) and one side of the water outlet pipeline (6), a lower flange plate (10) is fixedly connected on the top of the connecting pipe (9), and the two upper flange plates (8) are respectively matched with the two lower flange plates (10), go up ring flange (8) and lower ring flange (10) and pass through screw fixed connection, condenser box (3) and fixedly connected with water inlet connector (11) are run through to inlet channel (5) one end, outlet channel (6) one end runs through condenser box (3) and fixedly connected with water outlet connector (12).

2. The rectification and condensation device for producing 2-chloro-5-trifluoromethylpyridine according to claim 1, wherein: one side of the top of the reaction kettle (1) is fixedly connected with an inlet pipe (13), the bottom of the reaction kettle (1) is fixedly connected with a first discharge pipe (14), and the bottom of the rectifying tower (2) is fixedly connected with a second discharge pipe (15).

3. The rectification and condensation device for producing 2-chloro-5-trifluoromethylpyridine according to claim 1, wherein: one side of the top of the reaction kettle (1) is fixedly connected with a first air duct (16), one end of the first air duct (16) is communicated with the inside of the rectifying tower (2), one side of the top of the rectifying tower (2) is fixedly connected with a second air duct (17), and one end of the second air duct (17) is communicated with the inside of the condensing box (3).

4. The rectification and condensation device for producing 2-chloro-5-trifluoromethylpyridine according to claim 3, wherein: condenser box (3) bottom fixedly connected with eduction tube (18), eduction tube (18) bottom fixedly connected with vapour and liquid separator (19), row's of fixedly connected with third material pipe (20) in vapour and liquid separator (19) bottom.

5. The rectification and condensation device for producing 2-chloro-5-trifluoromethylpyridine according to claim 4, wherein: one side of the delivery pipe (18) is fixedly connected with a third air duct (21), one end of the third air duct (21) is communicated with the inside of the rectifying tower (2), a cavity (22) is formed in the inner wall of the reaction kettle (1), and a heating coil (23) is arranged in the cavity (22) in a winding mode.

6. The rectification and condensation device for producing 2-chloro-5-trifluoromethylpyridine according to claim 1, wherein: reation kettle (1) top fixedly connected with driving motor (24), reation kettle (1) is inside to be equipped with (mixing) shaft (25), (mixing) shaft (25) top run through reation kettle (1) and with driving motor (24) output shaft transmission connection, (mixing) shaft (25) fixed surface is connected with stirring leaf (26).