CN212819918U

CN212819918U - Reaction unit for vinyl ether catalytic production

Info

Publication number: CN212819918U
Application number: CN202021259194.4U
Authority: CN
Inventors: 王立冬; 王志敏; 宁光忠; 闫振邦; 田华; 赵肖松
Original assignee: Jiaozuo Xinjing Technology Co ltd
Current assignee: Jiaozuo Xinjing Technology Co ltd
Priority date: 2020-06-30
Filing date: 2020-06-30
Publication date: 2021-03-30
Anticipated expiration: 2030-06-30

Abstract

The utility model discloses a reaction device for vinyl ether catalytic production, which comprises a reaction tank, a rotating shaft, a stirring paddle component, a driving motor, an air inlet component and an exhaust component; the stirring paddle component comprises a plurality of linear stirring blades and a plurality of spiral conveying blades; the air inlet assembly comprises a buffer tank, a U-shaped pipe, an air inlet pipe, a mixing pipe and an air distribution ring pipe; the exhaust assembly comprises an exhaust pipe and an exhaust filter screen. The utility model has simple structure and convenient operation; the gas inlet assembly enables gas to be uniformly distributed in the liquid in the lower tank body, so that the gas and the liquid can be in full contact for reaction; the spiral blades are fixedly arranged in the premixing pipe, and the catalyst and the alcohols are preliminarily mixed under the action of gravity and the spiral blades and flow into the lower tank body; the stirring paddle component prevents gas from rising rapidly, prolongs the time of the gas in liquid and enables the gas to react fully.

Description

Reaction unit for vinyl ether catalytic production

Technical Field

The utility model relates to a chemical production equipment technical field especially relates to vinyl ether is reaction unit for catalytic production.

Background

Vinyl ethers are compounds in which one hydrogen atom of the ethylene molecule is replaced by an alkoxy group, and have the general formula CH₂CHOR. Vinyl ethers have active chemical reactivity and are readily polymerizable in the liquid or gas phase. Vinyl ether is an important monomer and organic synthesis intermediate of high polymer, the polymerization reaction of vinyl ether is systematically studied in the 20 th century, and the industrial production of vinyl ether and polyvinyl ether is started in 1930 in Germany. The vinyl ether polymer has excellent flexibility, solubility and cohesiveness, and is non-toxic and harmless, so that it is mainly used for making adhesive, paint oil viscosity modifier, plasticizer and hair spray. The vinyl ether compounds can be prepared by acetylene method, dehydrohalogenation method and thermal acetal decomposition method; the acetylene method is to carry out nucleophilic addition reaction on acetylene and alcohols, wherein the reaction is to prepare a vinyl ether compound by taking metal compounds such as alkali metal (such as KOH and NaOH) as catalysts under the conditions of heating and pressurizing.

Vinyl ethyl ether is one of vinyl ethers and has active chemical reaction performance. It can be used as anesthetic, analgesic, intermediate of fine chemicals, intermediate of sulfadiazine, monomer of copolymer and raw material for organic synthesis, and can be used to prepare perfume and lubricant additive. The preparation method adopts a general method of vinyl ether, acetylene and nitrogen are mixed and then are introduced into a reaction device of mixed liquid containing alcohols and alkali metal compounds for catalytic reaction. The reaction device in the prior art is usually a reaction kettle, but in the reaction process, the gas and the liquid are not uniformly mixed, so that sufficient contact cannot be realized, the gas cannot fully react with the liquid, and the reaction efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the prior technical problem and providing a reaction device for vinyl ether catalytic production.

In order to achieve the purpose, the utility model is implemented according to the following technical scheme:

the reaction device for vinyl ether catalytic production comprises a reaction tank, a rotating shaft, a stirring paddle component and a driving motor; the stirring paddle component is fixedly arranged on the rotating shaft, and the driving motor drives the rotating shaft to rotate; a heating jacket is arranged outside the reaction tank; the reaction device also comprises an air inlet component and an air outlet component;

the reaction tank comprises an upper cover body and a lower tank body; the upper cover body is connected with the lower tank body through a flange; a discharge pipe is fixedly arranged at the center of the bottom of the lower tank body; the upper cover body is provided with a flange window; a liquid inlet pipe is arranged on the side wall of the lower tank body;

the stirring paddle component comprises a plurality of linear stirring blades and a plurality of spiral conveying blades; the linear stirring blades are fixedly arranged on the rotating shaft, and spiral conveying blades are fixedly arranged between adjacent linear stirring blades;

the air inlet assembly comprises a buffer tank, a U-shaped pipe, an air inlet pipe, a mixing pipe and an air distribution ring pipe; the buffer tank is provided with a nitrogen inlet pipe and an acetylene inlet pipe; the buffer tank is communicated with the U-shaped pipe through a pipeline; the U-shaped pipe, the air inlet pipe, the mixing pipe and the air distribution ring pipe are communicated in sequence; the right end opening of the air inlet pipe extends downwards into the lower tank body; a left baffle and a right baffle are fixedly arranged on the inner wall of the mixing pipe; the left baffle and the right baffle are semicircular, and are alternately arranged on the left side and the right side of the inner wall of the mixing pipe; the gas distribution ring pipe is arranged at the bottom of the lower tank body through a bracket; a plurality of air distribution holes are distributed around the inner side and the outer side of the air distribution ring pipe;

the length of the linear stirring blade is smaller than the diameter of the inner ring of the gas distribution ring pipe, and the outer diameter of the spiral conveying blade is smaller than the diameter of the inner ring of the gas distribution ring pipe;

the exhaust component comprises an exhaust pipe and an exhaust filter screen; the tail part of the exhaust pipe extends into the upper cover body; the tail part of the exhaust pipe is provided with an exhaust filter screen.

Preferably, the liquid inlet pipe is L-shaped, and the opening at the left end of the liquid inlet pipe extends downwards into the lower tank body; the right end of the liquid inlet pipe is communicated with a catalyst inlet pipe and an alcohol inlet pipe.

Preferably, the lower square flange of the left end opening of the liquid inlet pipe is connected with a premixing pipe; helical blades are fixedly arranged in the premixing pipe.

Preferably, the exhaust filter screen is connected with the exhaust pipe through a connecting piece; the connecting piece is of an integrated structure and comprises a straight pipe part and a conical part; the straight pipe part is in threaded connection with the tail part of the exhaust pipe; the conical part is internally provided with a mounting ring, and the exhaust filter screen is fixedly mounted on the mounting ring through bolts.

Utility model's principle of action:

the utility model discloses when using, alcohol, catalyst (sodium hydroxide solution, potassium hydroxide solution) advance the pipe through alcohol respectively, the catalyst advances the pipe and enters into the liquid and advance intraductally, advances the pipe along liquid and enters into the pipe in advance. The spiral blades are fixedly arranged in the premixing pipe, and the catalyst and the alcohols are preliminarily mixed under the action of gravity and the spiral blades and flow into the lower tank body; further mixing is then carried out by the action of the paddle assembly. The premixing process saves the mixing time of the stirring paddle component and improves the mixing efficiency.

Acetylene and nitrogen enter the lower tank body through the air inlet assembly. Acetylene and nitrogen enter the buffer tank through an acetylene inlet pipe and a nitrogen inlet pipe respectively, and then enter the lower tank body through a U-shaped pipe, an air inlet pipe, a mixing pipe and an air distribution ring pipe in sequence. The U-shaped pipe prevents the liquid in the lower tank body from being sucked back to enter the buffer tank; install left baffle, right baffle in the hybrid tube, acetylene and nitrogen gas are when the hybrid tube, and the disturbance of left baffle, right baffle blocks the effect and mixes down, then enters into down the jar body through the gas distribution ring pipe. The gas distribution ring pipe uniformly leads gas into the liquid in the lower tank body from the bottom of the lower tank body, mixes the gas with the liquid and reacts with the liquid. The vinyl ethers obtained by the reaction are discharged from the exhaust pipe. The U-shaped pipe, the air inlet pipe, the mixing pipe and the gas distribution ring pipe are fixedly connected through pipe joints, the selection and the use of the pipe joints are the prior art, and the selection can be carried out by a person skilled in the art according to the actual use condition, and the detailed description is omitted.

The exhaust pipe is provided with an exhaust filter screen which can remove liquid carried in a part of gas, and the exhausted gas is condensed in the next step to obtain the vinyl ether finished product. The exhaust filter screen is detachably mounted on the exhaust pipe through the connecting piece, and is convenient to detach and clean. The exhaust filter screen is arranged on the conical part of the connecting piece, the area is larger, and liquid drops are conveniently filtered.

The stirring paddle component also comprises a spiral conveying blade, and the spiral conveying blade can be conveyed upwards or downwards by controlling the rotating direction of the rotating shaft. When the mixing of gas and liquid needs to be prolonged, the spiral conveying blades can be conveyed downwards, the gas is prevented from rising rapidly, and the time of the gas in the liquid is prolonged, so that the gas can react fully. The specific rotation direction of the rotating shaft and the rotation mode can be controlled by those skilled in the art according to actual use requirements, and are not described in detail herein.

The utility model has the advantages that:

the utility model has simple structure and convenient operation; the gas inlet assembly enables gas to be uniformly distributed in the liquid in the lower tank body, so that the gas and the liquid can be in full contact for reaction; the spiral blades are fixedly arranged in the premixing pipe, and the catalyst and the alcohols are preliminarily mixed under the action of gravity and the spiral blades and flow into the lower tank body; the stirring paddle component prevents gas from rising rapidly, prolongs the time of the gas in liquid and enables the gas to react fully.

Drawings

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

FIG. 2 is a top view of the gas distribution loop of FIG. 1;

FIG. 3 is a cross-sectional view of the mixing tube of FIG. 1 taken along E-E;

fig. 4 is an enlarged view at F in fig. 1.

In the figure: 1. a rotating shaft; 2. a drive motor; 3. a heating jacket; 4. an upper cover body; 5. a tank body is arranged; 6. a discharge pipe; 7. a flange window; 8. a liquid inlet pipe; 9. catalyst inlet pipe; 10. an alcohol inlet pipe; 11. a premix tube; 12. a helical blade; 13. a linear stirring blade; 14. a screw conveying blade; 15. a buffer tank; 16. a U-shaped pipe; 17. an air inlet pipe; 18. a mixing tube; 19. a gas distribution ring pipe; 20. a nitrogen inlet pipe; 21. an acetylene inlet pipe; 22. a left baffle; 23. a right baffle; 24. distributing air holes; 25. an exhaust pipe; 26. an exhaust filter screen; 27. a connecting member; 28. a straight tube portion; 29. a tapered portion; 30. and (7) installing a ring.

Detailed Description

The invention will be further described with reference to the drawings and specific embodiments, illustrative embodiments and description of which are provided herein to explain the invention, but not as a limitation thereof.

As shown in fig. 1 to 4, the reaction apparatus for catalytic production of vinyl ethers comprises a reaction tank, a rotating shaft 1, a stirring paddle assembly, a driving motor 2, an air inlet assembly, and an air outlet assembly. The stirring paddle component is fixedly arranged on the rotating shaft 1, and the driving motor 2 drives the rotating shaft 1 to rotate; the heating jacket 3 is arranged outside the reaction tank.

The reaction tank comprises an upper cover body 4 and a lower tank body 5; the upper cover body 4 is connected with the lower tank body 5 through a flange; a discharge pipe 6 is fixedly arranged at the center of the bottom of the lower tank body 5; the upper cover body 4 is provided with a flange window 7; the side wall of the lower tank body 5 is provided with a liquid inlet pipe 8.

The liquid inlet pipe 8 is L-shaped, and the left end opening of the liquid inlet pipe extends downwards into the lower tank body 5; the right end of the liquid inlet pipe 8 is communicated with a catalyst inlet pipe 9 and an alcohol inlet pipe 10. The lower square flange of the left end opening of the liquid inlet pipe 8 is connected with a premixing pipe 11; the premix tube 11 is fixedly provided therein with a helical blade 12.

The stirring paddle component comprises four straight stirring blades 13 and three spiral conveying blades 14; the linear stirring blades 13 are fixedly arranged on the rotating shaft 1, and the spiral conveying blades 14 are fixedly arranged between the adjacent linear stirring blades 13.

The air inlet assembly comprises a buffer tank 15, a U-shaped pipe 16, an air inlet pipe 17, a mixing pipe 18 and an air distribution ring pipe 19. A nitrogen inlet pipe 20 and an acetylene inlet pipe 21 are arranged on the buffer tank 15; the buffer tank 15 is communicated with a U-shaped pipe 16 through a pipeline; the U-shaped pipe 16, the air inlet pipe 17, the mixing pipe 18 and the air distribution ring pipe 19 are communicated in sequence; the right end opening of the air inlet pipe 17 extends downwards into the lower tank body 5; a left baffle 22 and a right baffle 23 are fixedly arranged on the inner wall of the mixing pipe 18; the left baffle 22 and the right baffle 23 are both semicircular, and the left baffle 22 and the right baffle 23 are alternately arranged on the left side and the right side of the inner wall of the mixing pipe 18; the gas distribution ring pipe 19 is arranged at the bottom of the lower tank body 5 through a bracket; eighteen air distribution holes 24 are circumferentially distributed on the inner side and the outer side of the air distribution ring pipe 19.

The length of the linear stirring blade 13 is smaller than the diameter of the inner ring of the gas distribution ring pipe 19, and the outer diameter of the spiral conveying blade 14 is smaller than the diameter of the inner ring of the gas distribution ring pipe 19;

the exhaust component comprises an exhaust pipe 25 and an exhaust filter screen 26; the tail part of the exhaust pipe 25 extends into the upper cover body 4; the exhaust filter 26 is connected with the exhaust pipe 25 through a connecting piece 27; the connecting piece 27 is of an integrated structure and comprises a straight pipe part 28 and a conical part 29; the straight pipe part 28 is in threaded connection with the tail part of the exhaust pipe 25; the conical portion 29 has a mounting ring 30 therein, and the exhaust filter 26 is fixedly mounted on the mounting ring 30 by bolts.

The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.

Claims

1. The reaction device for vinyl ether catalytic production comprises a reaction tank, a rotating shaft, a stirring paddle component and a driving motor; the stirring paddle component is fixedly arranged on the rotating shaft, and the driving motor drives the rotating shaft to rotate; a heating jacket is arranged outside the reaction tank; the method is characterized in that: the reaction device also comprises an air inlet component and an air outlet component;

2. The reaction apparatus for the catalytic production of vinyl ethers according to claim 1, wherein: the liquid inlet pipe is L-shaped, and the left end opening of the liquid inlet pipe extends downwards into the lower tank body; the right end of the liquid inlet pipe is communicated with a catalyst inlet pipe and an alcohol inlet pipe.

3. The reaction apparatus for the catalytic production of vinyl ethers according to claim 2, wherein: the lower square flange of the left end opening of the liquid inlet pipe is connected with a premixing pipe; helical blades are fixedly arranged in the premixing pipe.

4. The reaction apparatus for the catalytic production of vinyl ethers according to claim 3, wherein: the exhaust filter screen is connected with the exhaust pipe through a connecting piece; the connecting piece is of an integrated structure and comprises a straight pipe part and a conical part; the straight pipe part is in threaded connection with the tail part of the exhaust pipe; the conical part is internally provided with a mounting ring, and the exhaust filter screen is fixedly mounted on the mounting ring through bolts.