CN212142586U - 2-chlorine-5-chloromethyl pyridine production agitating unit - Google Patents
2-chlorine-5-chloromethyl pyridine production agitating unit Download PDFInfo
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- CN212142586U CN212142586U CN202020332571.6U CN202020332571U CN212142586U CN 212142586 U CN212142586 U CN 212142586U CN 202020332571 U CN202020332571 U CN 202020332571U CN 212142586 U CN212142586 U CN 212142586U
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Abstract
The utility model relates to a 2-chlorine-5-chloromethyl pyridine production agitating unit, including pivot, vortex dish and agitator, go through go-between fixed connection in vortex dish, agitator and pivot, set up n vortex sticks on the vortex dish, vortex dish is located the top of pivot, connects two impulse type agitators and a oar formula agitator down in proper order in the pivot. The utility model provides the high mixed effect of triphosgene and reaction liquid, the feed liquid reciprocates from top to bottom during the stirring and turns, can effectively improve reaction efficiency to can reduce triphosgene's loss rate, reduce exhaust emission, can effectively reduce the introduction of impurity (like organic amine) simultaneously.
Description
Technical Field
The utility model belongs to the chemical production device field, concretely relates to 2-chlorine-5-chloromethyl pyridine production agitating unit.
Background
2-chloro-5-chloromethylpyridine (CCMP) is colorless crystal, has a melting point of 34-35 ℃, and is an important intermediate for synthesizing pyridine pesticides. From the research work of CCMP synthesis in 1999, more than ten synthesis routes are developed in China, which can be basically divided into 3-methylpyridine route, morpholine route and benzylamine route, and the current domestic CCMP main synthesis route is a direct cyclization process using cyclopentadiene and acrolein as raw materials:
because the phosphorus oxychloride process has low reaction yield and is easy to generate a large amount of phosphorus-containing wastewater and a large amount of solid waste, a process for replacing phosphorus oxychloride with triphosgene is developed. Triphosgene, the chemical name of which is bis (trichloromethyl) carbonate, BTC for short, is white crystal at room temperature, has high melting point, low volatility and relatively low toxicity, has the advantages of mild conditions required for synthesis and chemical reaction, strong selectivity, relative safety in use and easiness in transportation and storage, and is widely used as a substitute reactant of phosphorus oxychloride in CCMP preparation at present.
However, there are also problems with the use of triphosgene in the production of 2-chloro-5-chloromethylpyridine: triphosgene will decompose slightly at temperatures above 130 ℃ to produce phosgene, will start to decompose after moisture absorption at 90 ℃ to produce phosgene, and will decompose at lower temperatures in the presence of certain organic amines. Experiments show that triphosgene is decomposed when reaching about one third of the reaction kettle, under ordinary stirring, the triphosgene cannot completely participate in the reaction, so that phosgene escapes, gas and liquid cannot be completely mixed, the normal operation of chemical reaction is influenced, the product yield is reduced, the content of unreacted gas in tail gas is higher, the load of a subsequent absorption process is higher, and gas pollution and emission are easily caused.
Above-mentioned problem makes 2-chlorine-5-chloromethyl pyridine use triphosgene in the production process to have certain restriction, consequently, need provide a 2-chlorine-5-chloromethyl pyridine production agitating unit, when guaranteeing that chemical reaction normally goes on, reduces the stirring dynamics, accelerates stirring efficiency, improves production quality.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the triphosgene in the use that exists among the prior art, gas, the unable intensive mixing of liquid, shortcomings such as direct effusion after the triphosgene decomposes, the utility model provides a 2-chlorine-5-chloromethyl pyridine production agitating unit, introduction through agitating unit has realized reaction liquid and triphosgene intensive mixing reaction in the cauldron, thereby guaranteed chemical reaction's normal clear, and the interior liquid of reation kettle from top to bottom circulation, reduced phosgene effusion, improved the reaction yield, lightened the load of follow-up absorption process, the triphosgene who has solved unable solution among the traditional 2-chlorine-5-chloromethyl pyridine production agitating unit uses too much, the problem of easy decomposition effusion, have use and overhaul simple and convenient, the advantage of safety ring guarantor.
The utility model discloses a realize above-mentioned technical purpose, provide following technical scheme: the stirring device for 2-chloro-5-chloromethylpyridine production is characterized by comprising a rotating shaft, a flow disturbing disc and a stirrer, wherein the flow disturbing disc and the stirrer are fixedly connected with the rotating shaft through a connecting ring;
furthermore, n turbulence bars are arranged on the turbulence disc and vertically and uniformly distributed on the turbulence disc, and the turbulence disc is positioned at the uppermost end of the rotating shaft;
further, the stirrer comprises a connecting ring, a blade and a paddle shaft and is divided into a push stirrer and a paddle stirrer, the push stirrer is arranged on the middle two layers of the rotating shaft, and the paddle stirrer is arranged on the lowest layer;
furthermore, the propulsion type stirrer consists of three propeller blades which are mutually generated by taking the connecting ring as an axis;
furthermore, the surface of the blade of the propeller stirrer is provided with a groove-shaped diversion strip;
further, the propeller blades of the push type stirrer form an included angle of 30 degrees with the connecting ring;
further, the paddle stirrer consists of two symmetrical paddle stirrer blades based on a connecting ring;
further, a flow guide hole is formed in the paddle blade of the paddle type stirrer;
further, the paddle type stirrer blade is L-shaped and is vertically arranged with the connecting ring;
furthermore, the connecting rings can be tightly sleeved on the rotating shaft, and each connecting ring is fixed on the rotating shaft by 6 fixing buckles;
furthermore, magnetic suckers are arranged on the upper surface and the lower surface of the adjacent connecting ring;
further, the rotating shaft, the turbulence plate and the stirrer are made of enamel.
Owing to adopted above technique, the utility model discloses compare with prior art, it is showing the advantage and is:
(1) the mixing effect of the triphosgene and the reaction liquid can be improved, the stirring device is divided into four layers, the feed liquid is stirred from top to bottom in a reciprocating manner during stirring, the turbulence bars and the flow guide strips and the flow guide holes on the pulp sheet enable the liquid to flow in a disordered manner, and finally the complete mixing of the materials is achieved;
(2) the waste gas emission is reduced, and the reaction efficiency can be effectively improved, so that the loss rate of triphosgene can be reduced, and the load of the subsequent absorption process is reduced;
(3) the stirring device is simple in structure and easy to realize, and can effectively reduce the stirring force and improve the stirring effect.
Drawings
FIG. 1 is a schematic structural view of a stirring apparatus for producing 2-chloro-5-chloromethylpyridine in accordance with the present invention;
FIG. 2 is a schematic diagram of a propeller-type stirrer of the stirring apparatus for producing 2-chloro-5-chloromethylpyridine according to the present invention;
FIG. 3 is a schematic view of a paddle stirrer of the stirring apparatus for producing 2-chloro-5-chloromethylpyridine according to the present invention;
FIG. 4 is a schematic view of the connecting ring structure of the stirring apparatus for producing 2-chloro-5-chloromethylpyridine in accordance with the present invention;
in the figure: 1-rotating shaft, 11-driving shaft, 2-turbulence plate, 21-turbulence rod, 3-first propulsion stirrer, 4-second propulsion stirrer, 5-paddle stirrer, 31-propulsion stirrer blade, 32-propulsion stirrer blade shaft, 33-flow guide strip, 51-paddle stirrer blade, 52-paddle stirrer blade shaft, 53-flow guide hole, 6 connecting ring, 61-fixing buckle and 62-magnetic suction cup.
Detailed Description
In order to make the technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail with reference to the following embodiments.
Example 1
The stirring device for producing 2-chloro-5-chloromethylpyridine shown in fig. 1 comprises a rotating shaft 1, a turbulence plate 2, a first push type stirrer 3, a second push type stirrer 4 and a paddle type stirrer 5, wherein the rotating shaft 1 is divided into four layers, and the turbulence plate 2, the first push type stirrer 3, the second push type stirrer 4 and the paddle type stirrer 5 are sequentially arranged from top to bottom and are connected through a connecting ring 6;
as shown in fig. 2, the propeller agitator blades of the uppermost and middle layers are intergrown based on the connection ring 6;
as shown in fig. 3, the lowermost paddle agitator blades are axisymmetrical based on the attachment ring 6;
as shown in FIG. 4, the connecting ring 6 is fixed on the rotating shaft by 6 fixing buckles, and the magnetic suction cups 62 are arranged on the upper surface and the lower surface of the connecting ring.
The utility model provides a 2-chlorine-5-chloromethyl pyridine production agitating unit, starter motor drives driving shaft 11 and rotates, and vortex disc 2 and agitator rotate under driving shaft 11's drive, and vortex disc 2 and agitator rotate, can improve the mixed effect of triphosgene and reaction liquid, reduce exhaust emission, can effectively improve reaction efficiency to can reduce the loss rate of triphosgene, alleviate the load of follow-up absorption process.
Set up n vortex rods 21 on vortex dish 2, perpendicular even distribution is on vortex dish 2, and vortex dish 2 is located the top of pivot 1, sets up vortex dish 2 on agitating unit, not only can block rising gas, avoids vortex rod and stirring rake to collide to its during operation (mixing) shaft drives vortex dish 2, and vortex rod 21 on the vortex dish 2 hinders the liquid flow in reation kettle, reaches the purpose that the misce bene just is difficult for producing the bubble.
The stirrer comprises a connecting ring 6, a blade and a paddle shaft and is divided into a push stirrer and a paddle stirrer, the middle two layers of the rotating shaft are the push stirrers (a first push stirrer 3 and a second push stirrer 4), and the lowest layer is the paddle stirrer 5.
The propeller stirrer consists of three propeller stirrer blades 31 which are mutually generated by taking the connecting ring 6 as an axis, the surface of each propeller stirrer blade 31 is provided with a groove-shaped diversion strip 33, the propeller stirrer blades are connected with the connecting ring through propeller stirrer shafts 32 and form an included angle of 30 degrees, and the propeller stirrer shafts 32 and the rotating shaft 1 are inclined at different angles, so that the liquid flow direction can be disordered, and the liquid can flow in a new direction.
The paddle type stirrer consists of two paddle type stirrer blades 51 which are symmetrical based on a connecting ring, the paddle type stirrer blades 51 are provided with flow guide holes 53, and the paddle type stirrer blades are L-shaped and are vertically arranged with the connecting ring; the connecting ring 6 can be closely sleeved on the rotating shaft, the diversion holes 53 are formed in the bottommost paddle type stirrer paddle 51, part of liquid can directly penetrate through the diversion holes, the liquid flow direction in the reaction kettle is enabled to be more disordered, the reaction is more uniform, the resistance of the liquid flow in the reaction kettle can be reduced through the diversion holes 53, the impact force received by the bottom paddle type stirrer paddle 51 is reduced, and the bottom paddle type stirrer paddle 51 is prevented from being bent and damaged.
Each connecting ring is fixed in the pivot by 6 retaining buckles 61, prevents that the adjacent connecting ring upper and lower two sides is provided with magnetic chuck 62, makes adjacent connecting ring 6 pivot 1, spoiler 2 and agitator are that enamel is made. The utility model discloses an agitating unit installs in reation kettle, and the driving shaft links to each other with the motor, and in reation kettle was arranged in to the other end, such structure linked to each other more conveniently to the motor, this agitating unit was suitable for enamel reation kettle.
The novel industrial stirring device has the characteristics of simple structure, easy operation and strong stirring efficiency; has positive promoting effect on improving the production efficiency of the 2-chloro-5-chloromethylpyridine. The utility model discloses agitating unit has improved the mixed effect of triphosgene and reaction liquid, and the feed liquid reciprocates from top to bottom during the stirring and turns, finally reaches the complete mixing of material, reduces exhaust emission, can effectively improve reaction efficiency to can reduce the loss rate of triphosgene, alleviateed the load of follow-up absorption process.
The novel stirring device not only can be used for the production of 2-chloro-5-chloromethyl pyridine, but also is suitable for the production and synthesis of other chemical products.
The above-mentioned embodiments are merely preferred technical solutions of the present invention, and should not be regarded as limitations of the present invention, and the protection scope of the present invention should be protected by the technical solutions described in the claims, and equivalent alternatives including technical features in the technical solutions described in the claims are also within the protection scope of the present invention.
Claims (10)
1. The stirring device for 2-chloro-5-chloromethylpyridine production is characterized by comprising a rotating shaft, a flow disturbing disc and a stirrer, wherein the flow disturbing disc and the stirrer are fixedly connected with the rotating shaft through a connecting ring;
the turbulence disc is provided with n turbulence rods, the n turbulence rods are vertically and uniformly distributed on the turbulence disc, and the turbulence disc is positioned at the uppermost end of the rotating shaft;
the stirrer comprises a connecting ring, a paddle blade and a paddle shaft and is divided into a push type stirrer and a paddle type stirrer, the push type stirrer is arranged in the middle of the rotating shaft, and the paddle type stirrer is arranged at the lowest layer of the rotating shaft.
2. The stirring apparatus for the production of 2-chloro-5-chloromethylpyridine according to claim 1, wherein the propeller agitator comprises three propeller agitator blades which are mutually coaxial and are connected by a connecting ring.
3. The stirring device for the production of 2-chloro-5-chloromethylpyridine as claimed in claim 2, wherein the surface of the blade of said propeller stirrer has a groove-shaped flow guide strip.
4. The stirring device for the production of 2-chloro-5-chloromethylpyridine according to claim 2, wherein the propeller-type stirrer blade forms an angle of 30 ° with the connecting ring.
5. The stirring device for the production of 2-chloro-5-chloromethylpyridine according to claim 1, wherein the paddle stirrer comprises two symmetric paddle stirrer blades based on the connecting ring.
6. The stirring device for the production of 2-chloro-5-chloromethylpyridine according to claim 5, wherein the paddle stirrer is provided with flow guide holes.
7. The stirring device for the production of 2-chloro-5-chloromethylpyridine according to claim 5, wherein the paddle stirrer has an L-shaped blade which is arranged vertically to the connecting ring.
8. The stirring device for the production of 2-chloro-5-chloromethylpyridine as recited in claim 1, wherein the connecting rings can be tightly fitted around the rotating shaft, and each connecting ring is fixed on the rotating shaft by 6 fasteners.
9. The stirring device for the production of 2-chloro-5-chloromethylpyridine according to claim 1, wherein magnetic suction cups are disposed on the upper and lower surfaces of the adjacent connecting rings.
10. A stirring apparatus for the production of 2-chloro-5-chloromethylpyridine as in any one of claims 1 to 8, wherein said rotating shaft, said turbulence plate and said stirrer are made of enamel.
Priority Applications (1)
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CN202020332571.6U CN212142586U (en) | 2020-03-17 | 2020-03-17 | 2-chlorine-5-chloromethyl pyridine production agitating unit |
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CN202020332571.6U CN212142586U (en) | 2020-03-17 | 2020-03-17 | 2-chlorine-5-chloromethyl pyridine production agitating unit |
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