CN213467785U - Pipeline reaction device - Google Patents
Pipeline reaction device Download PDFInfo
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- CN213467785U CN213467785U CN202021865470.1U CN202021865470U CN213467785U CN 213467785 U CN213467785 U CN 213467785U CN 202021865470 U CN202021865470 U CN 202021865470U CN 213467785 U CN213467785 U CN 213467785U
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Abstract
The utility model discloses a pipeline reaction unit, it includes: a tubular reactor, and a magnetic rotor; the magnetic rotor is arranged in the pipeline of the tubular reactor; a magnetic stirring driving device; the magnetic stirring driving device is arranged outside the pipeline of the tubular reactor; the magnetic stirring driving device comprises a rotating shaft and a driving ring, wherein the center of the driving ring is connected with the rotating shaft through a connecting piece and is used for rotating by taking the rotating shaft as a center; at least two groups of permanent magnet assemblies are arranged on the driving ring; each group of permanent magnet assemblies comprises two magnets which are symmetrically arranged around the center of the driving ring, and the central magnetic field direction of the magnets in each permanent magnet assembly is vertical to the rotating shaft; the magnetic poles of the magnets in two adjacent permanent magnet assemblies are opposite; the permanent magnet assembly corresponds to the magnetic rotor in position, and the direction of a central magnetic field of the magnetic rotor is perpendicular to the rotating shaft. The utility model provides a pipeline reaction unit has increased reactant mixing efficiency.
Description
Technical Field
The utility model relates to a pipeline reaction unit.
Background
In the chemical industry, the batch reactor is flexible to operate, is easy to adapt to product varieties with different operating conditions, and is suitable for the production of products with small batch, multiple varieties and longer reaction time; the method has the defects that the auxiliary operations of loading, unloading and the like are required, and the product quality is not easy to stabilize.
For example, in the production of aryl formaldehyde synthesis, the mechanism of the reaction is:
the reaction substrate and N-butyl lithium generate lithium salt under low temperature, the lithium salt reacts with N, N-dimethylformamide to generate hydroxyl lithium salt, and the hydroxyl lithium salt is hydrolyzed with water to obtain the target aryl formaldehyde. The aryl formaldehyde synthesis reaction traditionally employs a batch reactor; however, the batch reactor needs a lot of energy and time to produce the product because of the large exothermic amount and the fast exothermic speed of the reaction. Most of the lithiation reagents cannot exist stably for a long time, and excessive impurities are easily generated in the process of the method.
Although the continuous kettle type reactor can avoid the defects of an intermittent reaction kettle, the back mixing of fluid in the kettle can be caused by the stirring action, and the back mixing phenomenon in the kettle type reactor is a negative factor in the occasion with higher conversion rate. Compared with a kettle reactor, the tubular reactor has the advantages of small volume, large specific surface, large heat transfer area per unit volume and small back mixing, and is suitable for large-scale and continuous chemical production.
The reactor is often provided with a stirring (mechanical stirring, airflow stirring and the like) device which can use a plurality of layers of stirring blades; but the rapid stirring and mixing of the reaction materials can not be realized. The length-diameter ratio of the tubular reactor is very large, and stirring blades cannot be adopted; and the turbulence effect of the existing rotor which can be used for the tubular reactor is poor, and the magnetons can only swing in a small range along the axial direction to enhance the mixing rate, so that the requirement of quick heat exchange reaction cannot be met.
Therefore, there is a need for a device that can achieve rapid mixing of the reaction mass, especially in the field of tubular reactors.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is that the mixing efficiency of overcoming tubular reactor among the prior art is relatively poor, can not satisfy the heat transfer requirement of reactor and the requirement of high efficiency reaction, and provide a pipeline reaction unit, solved reagent mixing efficiency and have the potential safety hazard scheduling problem.
The utility model discloses a solve above-mentioned technical problem through following technical scheme:
a pipe reaction apparatus, comprising:
a tubular reactor, and a magnetic rotor;
the magnetic rotor is arranged in the pipeline of the tubular reactor;
a magnetic stirring driving device;
the magnetic stirring driving device is arranged outside the pipeline of the tubular reactor;
the magnetic stirring driving device comprises a rotating shaft and a driving ring, wherein the center of the driving ring is connected with the rotating shaft through a connecting piece and is used for rotating by taking the rotating shaft as a center;
at least two groups of permanent magnet assemblies are arranged on the driving ring; each group of permanent magnet assemblies comprises two magnets symmetrically arranged around the center of the driving ring, and the central magnetic field direction of the magnets in each permanent magnet assembly is vertical to the rotating shaft; two adjacent permanent magnet assemblies: the central magnetic field direction of the magnets in one permanent magnet assembly points to the center of the driving ring, and the central magnetic field direction of the magnets in the other permanent magnet assembly points from the center of the driving ring;
the permanent magnet assembly corresponds to the magnetic rotor in position, and the direction of the central magnetic field of the magnetic rotor is perpendicular to the rotating shaft.
In the present invention, the tubular reactor may be a tubular reactor conventionally understood by those skilled in the art.
In the present invention, the magnetic rotor may be a conventional magnetic rotor in the field.
In the present invention, the shape of the magnetic rotor may be a shape conventional in the art, such as a cylinder, a diamond, a cross, or a spiral.
In the present invention, the size of the magnetic rotor may be a size that is conventional in the art, for example, when the shape of the magnetic rotor is a cylinder, a diamond, or a spiral, the ratio of the diameter to the length of the magnetic rotor is 1: 0.5-3.
Wherein, preferably, the central magnetic field direction of the magnetic rotor coincides with the radial direction of the magnetic rotor.
In the present invention, the outer coating material of the magnetic rotor may be a conventional material in the art, for example, the outer coating material of the magnetic rotor is teflon.
The utility model discloses in, still including being used for the drive among the magnetic stirring drive arrangement the rotatory driving motor of rotation axis, driving motor with tubular reactor's outside rigid coupling. The drive motor may be a motor conventional in the art, such as a stepper motor.
Preferably, the magnetic stirring driving device is packaged in a box body, and the box body is fixedly connected with the outside of the tubular reactor.
The fastening may be conventional in the art, such as by a tie.
In the present invention, the connection manner of the connection member and the rotation shaft may be conventional in the art, such as welding.
In the present invention, the magnet in the permanent magnet assembly may be a permanent magnet that is conventional in the art, for example, a permanent magnet that is rectangular parallelepiped in shape.
As is generally known to those skilled in the art, the number of the permanent magnet assemblies can be adjusted according to production requirements, and preferably, two sets of permanent magnet assemblies are arranged on the driving ring.
The utility model discloses in, pipeline reaction unit still can include a speed control device, speed control device with magnetism stirring drive arrangement electricity is connected, and it is right through the frequency modulation realization the speed control of magnetism rotor.
In the present invention, generally, a plurality of magnetic rotors, each of which is disposed in the pipeline of the pipeline reaction device according to the requirement of the technical personnel in the field are disposed on the magnetic stirring driving device, and the permanent magnet assembly corresponds to each magnetic rotor.
The utility model provides a pipeline reaction unit is applicable in the preparation of aryl formaldehyde.
In the preparation process of the aryl formaldehyde, the adopted tubular reaction device is the pipeline reaction device.
Wherein, generally, the tubular reaction device comprises a first pipeline reaction device, a second pipeline reaction device and a third pipeline reaction device which are connected in sequence.
Generally, the first pipeline reaction device, the second pipeline reaction device and the third pipeline reaction device are used for lithiation reaction, addition reaction and quenching respectively.
Generally, the process for the preparation of aryl formals comprises the following steps: and adding the raw materials into the first pipeline reaction device, and reacting sequentially.
Typically, the third pipeline reaction unit is used to produce the aryl formaldehyde.
In the aryl formaldehyde preparation process, through adopting the utility model discloses an above-mentioned pipeline reaction unit makes the reaction go on in succession, quenches on line simultaneously to reduce the formation of accessory substance, improve the stability of product.
On the basis of the common knowledge in the field, the above preferred conditions can be combined at will to obtain the preferred embodiments of the present invention.
The reagent and the raw material used in the utility model are available on the market.
The utility model discloses an actively advance the effect and lie in:
(1) the utility model provides a pipeline reaction unit has increased the mixing efficiency of reactant.
(2) Adopt the utility model discloses a pipeline reaction unit can prepare aryl formaldehyde in succession by the high yield.
(3) The utility model discloses a pipeline reaction unit can enlarge the production with the aryl formaldehyde reaction, eliminates safe risk and enlargies the effect.
Drawings
Fig. 1 is a front view of a magnetic stirring drive device.
Fig. 2 is a sectional view of the magnetic stirring driving device.
FIG. 3 shows a pipe reactor with a magnetic stirring device.
FIG. 4 is a schematic flow chart of the process for preparing aryl formaldehyde by using the pipeline reaction device of the present invention.
1 magnetic stirring drive arrangement, 2 rotation axes, 3 permanent magnetism subassemblies, 4 connecting pieces, 5 magnetic rotor, 6 tubular reactor, 7 pipeline reaction unit, 8 box bodys.
Detailed Description
The present invention is further illustrated by way of the following examples, which are not intended to limit the scope of the invention. The experimental methods without specifying specific conditions in the following examples were selected according to the conventional methods and conditions, or according to the commercial instructions.
Example 1
As shown in fig. 1, 2 and 3, the pipe reaction apparatus 7 includes a pipe reactor 6, and a magnetic rotor 5, the magnetic rotor 5 being disposed in a pipe of the pipe reactor 6; the pipeline reaction device 7 also comprises a magnetic stirring driving device 1, the magnetic stirring driving device 1 is arranged in a box body 8, the box body 8 is arranged outside the pipeline of the tubular reactor 6, and the box body 8 is fixedly connected with the tubular reactor 6 through a binding belt; the magnetic stirring driving device 1 comprises a stepping motor, a rotating shaft 2 on the stepping motor and a driving ring (not shown in the figure), wherein the center of the driving ring is connected with the rotating shaft 2 through a connecting piece 4 and used for rotating by taking the rotating shaft as a center, and the connecting piece 4 is welded with the rotating shaft 2.
Two groups of permanent magnet assemblies 3 are arranged on the driving ring; each group of permanent magnet assemblies 3 comprises two magnets symmetrically arranged around the center of the driving ring, and the central magnetic field direction of the magnets in each permanent magnet assembly 3 is vertical to the rotating shaft 2; the arrangement mode of two adjacent permanent magnet assemblies is as follows: as shown in fig. 2, the central magnetic field direction of the magnets of one group of permanent magnet assemblies points to the center of the driving ring, and the central magnetic field direction of the adjacent magnets points to the center of the driving ring; the adopted magnet is a cuboid magnet.
The permanent magnet component 3 corresponds to the magnetic rotor 5 in position and is used for driving the magnetic rotor to rotate; and the central magnetic field direction of the magnetic rotor 5 is perpendicular to the rotation axis 2: as shown in fig. 3, the magnetic rotor 5 used is a rhombic rotor, and the magnetic pole end thereof is located in the radial direction of the rhombic rotor. Wherein, the diameter-length ratio of the rhombic rotor is 1:2, and the adopted coating material is Teflon.
As shown in fig. 4, in the process of producing an aryl formaldehyde, the reaction pipe of the pipe reactor 6 is a PFA (tetrafluoroethylene-perfluoroalkoxy vinyl ether copolymer, also referred to as perfluoroalkoxy, soluble polytetrafluoroethylene) pipe, and the pipe reactor 7 is a pipe reactor in the present embodiment.
In this embodiment, the pipeline reaction devices 7 in fig. 4 are respectively used for lithiation reaction, addition reaction and quenching, wherein a plurality of magnetic rotors are placed in each pipeline reaction device 7, and a permanent magnet assembly on each magnetic stirring driving device corresponds to each magnetic rotor (only one set of magnetic stirring driving device and one set of magnetic rotor are shown in fig. 3).
Continuously adding reaction raw materials and an n-butyl lithium reagent into a precooling pipeline reactor through a peristaltic pump respectively; preheating a reaction raw material and an n-butyllithium reagent in a precooling pipeline reactor, and then feeding the preheated reaction raw material and the n-butyllithium reagent into a lithiation pipeline reactor to carry out lithiation reaction; continuously adding DMF (N, N-diethylformamide) into a precooling pipeline reactor through a peristaltic pump, and after precooling, feeding the DMF and a reaction material flow generated by a lithiation pipeline reactor into an addition pipeline reactor together to perform the reaction of an addition product; then the product flows into a quenching pipeline reactor, and the product flows generated by the quenching pipeline reactor enter a product storage tank. The pre-cooling pipeline and the pipeline reaction device 7 are both arranged in a water bath at the temperature of-78 to-70 ℃.
Through experiments, the following results are found: by adopting the pipeline reaction device of the embodiment, the aryl formaldehyde can be continuously prepared with high yield; and the aryl formaldehyde reaction can be amplified for production, thereby eliminating safety risk and amplification effect.
Claims (8)
1. A pipe reaction apparatus, comprising:
a tubular reactor, and a magnetic rotor;
the magnetic rotor is arranged in the pipeline of the tubular reactor;
a magnetic stirring driving device;
the magnetic stirring driving device is arranged outside the pipeline of the tubular reactor;
the magnetic stirring driving device comprises a rotating shaft and a driving ring, wherein the center of the driving ring is connected with the rotating shaft through a connecting piece and is used for rotating by taking the rotating shaft as a center;
at least two groups of permanent magnet assemblies are arranged on the driving ring; each group of permanent magnet assemblies comprises two magnets symmetrically arranged around the center of the driving ring, and the central magnetic field direction of the magnets in each permanent magnet assembly is vertical to the rotating shaft; two adjacent permanent magnet assemblies: the central magnetic field direction of the magnets in one permanent magnet assembly points to the center of the driving ring, and the central magnetic field direction of the magnets in the other permanent magnet assembly points from the center of the driving ring;
the permanent magnet assembly corresponds to the magnetic rotor in position, and the direction of the central magnetic field of the magnetic rotor is perpendicular to the rotating shaft.
2. The pipe reaction apparatus according to claim 1, wherein the magnetic rotor has a cylindrical shape, a diamond shape, a cross shape, or a spiral shape.
3. The pipe reaction apparatus according to claim 2, wherein when the magnetic rotor has a cylindrical, rhombic or spiral shape, the magnetic rotor has a diameter-to-length ratio of 1:0.5 to 3.
4. The pipe reaction apparatus according to claim 3, wherein a direction of a central magnetic field of the magnetic rotor coincides with a radial direction of the magnetic rotor.
5. The pipeline reactor according to claim 1, wherein the magnetic stirring driving device further comprises a driving motor for driving the rotating shaft to rotate, and the driving motor is fixedly connected to the outside of the tubular reactor.
6. The pipeline reactor according to claim 5, wherein the magnetic stirring driving device is enclosed in a box body, and the box body is fixedly connected with the outside of the tubular reactor.
7. The pipe reaction apparatus according to claim 1, further comprising a speed control device electrically connected to the magnetic stirring driving device, wherein the speed control device controls the speed of the magnetic rotor by frequency adjustment.
8. The pipe reaction apparatus of claim 1, wherein two sets of permanent magnet assemblies are provided on the drive ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865470.1U CN213467785U (en) | 2020-08-31 | 2020-08-31 | Pipeline reaction device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021865470.1U CN213467785U (en) | 2020-08-31 | 2020-08-31 | Pipeline reaction device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213467785U true CN213467785U (en) | 2021-06-18 |
Family
ID=76416195
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021865470.1U Active CN213467785U (en) | 2020-08-31 | 2020-08-31 | Pipeline reaction device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213467785U (en) |
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2020
- 2020-08-31 CN CN202021865470.1U patent/CN213467785U/en active Active
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