Esterification reaction structure

Abstract

The utility model relates to the technical field of chemical production, and discloses an esterification reaction structure which comprises a plurality of reaction kettles which are sequentially arranged and distributed along the feeding direction, a reaction cavity used for esterification reaction is arranged in the reaction kettle, a first feeding port, a second feeding port and a discharging port which are communicated with the reaction cavity are formed in the reaction kettle, the first feeding port and the discharging port are located in the side face of the reaction kettle, the first feeding port and the discharging port are tangent to the inner wall of the reaction cavity, and the second feeding port and the discharging port are located in the side face of the reaction kettle. A flow guide groove is formed in the side wall of the reaction cavity, one end of the flow guide groove is connected with the first feeding port, the other end of the flow guide groove is distributed in the circumferential direction of the reaction cavity in a spiral winding mode, and the flow guide groove is used for spinning flow guide of materials input through the first feeding port. The esterification reaction device has the beneficial effect of good esterification reaction effect.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical production, in particular to an esterification reaction structure. Background Art

[0002] Methyl methacrylate (MMA) is an important organic chemical raw material and a monomer for homogeneous polymerization or copolymerization. It is widely used in industries such as home appliances, automobiles, construction, sanitary ware, instruments and meters, and advertising decoration. When producing MMA, the intermediate product acetone cyanohydrin and 100% (wt) sulfuric acid are usually used as raw materials. α-formamidoisopropyl hydrogen sulfate is generated through acylation reaction, and methacrylamide sulfate (MAAS) is obtained through transposition rearrangement reaction. The MAAS is esterified with methanol to generate methyl methacrylate (MMA), and then the qualified product MMA is produced through light removal and distillation in the refining unit. In order to ensure the esterification effect when the MAAS is esterified with methanol to generate methyl methacrylate (MMA), the material is usually esterified through an esterification reactor.

[0003] For example, the patent document with publication number CN116764546A discloses an esterification reactor, including a reactor, a feed pipe is fixedly connected to the left side of the reactor near the upper end, a discharge pipe is fixedly connected to the right side of the reactor near the lower end, a motor is fixedly connected to the center of the upper end of the reactor, a rotating rod is fixedly connected to the lower end of the motor, a stirring blade is movably connected to the rod wall of the rotating rod near the lower end, a quantitative liquid adding mechanism is provided at the upper end of the reactor, so that ethanol and concentrated sulfuric acid can be added to the interior in a quantitative manner, the quantitative liquid adding mechanism includes a liquid storage tank, the liquid storage tank is fixedly connected to the positions on both sides of the upper end of the reactor, the lower end of the liquid storage tank is fixedly connected to the liquid discharge pipe, and the upper parts of the inner walls on both sides of the reactor are fixedly connected to telescopic rods, so as to improve the reaction efficiency and make the esterification reaction more efficient.

[0004] In the above technical solution, during the esterification reaction, the motor drives the rotating rod in the reactor to drive the stirring blade to rotate, so as to stir the materials in the reactor. However, during the esterification reaction, the esterification reactor needs to continuously perform esterification reaction on the materials, so that the stirring blade needs to rotate and stir continuously, which causes the motor, the rotating rod and the stirring blade to easily malfunction after long-term operation, resulting in a short stop in the production process due to the maintenance of the esterification reactor, which seriously affects the normal production. Utility Model Content

[0005] The utility model aims to provide an esterification reaction structure to solve the technical problem in the prior art that an esterification reaction kettle is prone to failure after long-term operation, resulting in a short stop in production and seriously affecting the normal production.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an esterification reaction structure, comprising a plurality of reactors, which are arranged in sequence along the feeding direction; a reaction chamber for esterification reaction is provided in the reactor, a first feed port, a second feed port and a discharge port connected to the reaction chamber are provided on the reactor, the first feed port and the discharge port are located on the side of the reactor, the central axes of the first feed port and the discharge port are located on the tangent of the reaction chamber, a guide groove is provided on the side wall of the reaction chamber, one end of the guide groove is connected to the first feed port, and the other end is distributed in a circumferential spiral winding along the reaction chamber, and the guide groove is used for spin diversion of the material input by the first feed port.

[0007] The principle and advantage of this scheme are as follows: when esterification reaction is carried out between methacrylamide sulfate (MAAS) and methanol, raw materials such as methacrylamide sulfate (MAAS) and methanol are transported into the reactor through the first feed port and the second feed port, and the raw materials are mixed and reacted in the first reactor; when the materials enter the reaction chamber, the materials from the first feed port are input along the tangent of the reaction chamber, so that the materials can spiral along the side wall of the reaction chamber under the action of the guide groove, so that the materials can spin in the reaction chamber, drive the rotation of the materials in the reaction chamber, and complete the mixing of the materials.

[0008] In this solution, the feed port and the discharge port of the reactor are distributed along the tangent of the reaction chamber, so that when the material is input into the reaction chamber, the material can generate spin in the reaction chamber, so that the material can be mixed and stirred without the need for external power, thereby ensuring that the material is stirred and mixed while reducing the energy loss in the esterification reaction process; and reducing the structure of the stirring device driven by the motor on the reactor, avoiding the short stop of production and processing due to the failure of the motor and the stirring device during the long-term operation during the esterification reaction, ensuring that the reactor can continuously carry out the esterification reaction processing, and improving the efficiency of the esterification reaction processing.

[0009] Preferably, as an improvement, the multiple reactors are staggered along the feeding direction, and the first feed port of the reactor at the rear end of the feeding direction is connected to the discharge port of the reactor adjacent to the front end of the feeding direction, so that the materials can be fully mixed and esterified in the multiple reactors, thereby ensuring the effect of the esterification reaction processing of the materials.

[0010] Preferably, as an improvement, a feeding pump is provided between the first feeding port and the feeding port of adjacent reactors, so that when the material is transported between adjacent reactors, the material can have sufficient pressure to generate spin in the next reactor.

[0011] Preferably, as an improvement, a pressure piece is provided at one end of the first feed port close to the guide groove, and the extension direction of the output port of the pressure piece is consistent with the extension direction of the guide groove. When the material is transported into the reaction chamber through the first feed port, the material can flow on the inner wall of the reaction chamber with sufficient pressure, ensuring that the material has sufficient spinning power in the reaction chamber and the spinning effect of the material.

[0012] Preferably, as an improvement, a self-spinning rod is connected to rotate in the reaction chamber, and the self-spinning rod is provided with a plurality of first blades and a plurality of second blades, and the plurality of first blades and the plurality of second blades are evenly distributed around the axis of the self-spinning rod, and the first blade is located at one end of the self-spinning rod close to the bottom of the reaction chamber, and the second blade is located at the corresponding position of the self-spinning rod and the guide groove, and the second blade extends away from one end of the self-spinning rod into the guide groove. The second blade can drive the self-spinning rod and the first blade to rotate under the push of the material in the guide groove, so that the first blade can rotate to stir and mix the material without the need for motor drive, thereby improving the uniformity of stirring and mixing between the materials.

[0013] Preferably, as an improvement, the plane where one end of the second blade is located in the guide groove is perpendicular to the extension direction of the first feed port, thereby increasing the contact area between the second blade and the material and ensuring that the second blade can receive sufficient pressure to drive the rotation of the spin rod and the first blade.

[0014] Preferably, as an improvement, a plurality of guide protrusions are provided on the side wall of the reaction chamber, and the plurality of guide protrusions are evenly distributed along the circumference of the reaction chamber, so that during the esterification reaction, the material at the bottom of the reaction chamber can be lifted and rolled upward under the action of the guide protrusions, ensuring that the materials in each area of ​​the reaction chamber can be mixed, avoiding the deposition of the materials at the bottom of the reaction chamber, and ensuring the effect of material mixing and esterification reaction.

[0015] Preferably, as an improvement, the extension direction of the guide protrusion is inclined upward along the rotation direction of the first blade, and the inclination angle of the guide protrusion is 10°-20°. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the esterification reaction structure in the embodiment of the utility model.

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the reaction kettle in the embodiment of the utility model. DETAILED DESCRIPTION

[0018] The following is further described in detail through specific implementation methods:

[0019] The figure marks in the drawings of the specification include: reactor 1, first feed port 101, discharge port 102, second feed port 103, feed pipe 104, feed pipe 2, feed pump 201, guide groove 3, pressure member 301, spin rod 4, first blade 401, second blade 402, guide protrusion 5.

[0020] As attached Figure 1 As shown, an esterification reaction structure includes a plurality of reactors 1, which are arranged in sequence along a feeding direction. A reaction chamber is provided in the reactor 1, and the reaction chamber is used for mixing materials and performing esterification reaction.

[0021] A first feed port 101 and a discharge port 102 are provided on the reactor 1, and the first feed port 101 and the discharge port 102 are located on the side of the reactor 1. Preferably, in the present embodiment, the first feed port 101 is located on the side of the reactor 1 near the top end of the reactor 1, and the discharge port 102 is located on the side of the reactor 1 near the bottom end of the reactor 1; the first feed port 101 and the discharge port 102 pass through the side wall of the reactor 1 and are connected with the reaction chamber, the first feed port 101 is used to input materials into the reaction chamber, and the discharge port 102 is used to output materials in the reaction chamber. The first feed port 101 and the discharge port 102 are tangent to the inner wall of the reaction chamber, that is, the central axis of the first feed port 101 and the discharge port 102 is located on the tangent line of the reaction chamber; it is ensured that the material can flow along the inner wall of the reaction chamber after being transported into the reaction chamber, so that the material can spin under the action of inertia in the reaction chamber, and promote the flow of the material in the reaction chamber, so that the material can be mixed and stirred without the need for external power, and the energy loss in the esterification process is reduced while ensuring the stirring and mixing of the materials. A second feed port 103 is provided at the top of the reactor 1, the second feed port 103 is connected to the reaction chamber, the second feed port 103 is connected to the feeding pipe 104, and the second feed port 103 is used to transport raw materials into the reaction chamber. While the materials are mixed and esterified in multiple reactors 1, it is convenient to add materials to the reaction chamber of the intermediate reactor 1 through the second feed port 103 to ensure the full esterification reaction of the materials.

[0022] The multiple reactors 1 are staggered along the feeding direction. Preferably, in this embodiment, the multiple reactors 1 are distributed in an S-shape along the feeding direction, and the first feed port 101 of the reactor 1 at the rear end of the feeding direction is connected to the discharge port 102 adjacent to the front end of the feeding direction through a feed pipe 2. A feed pump 201 is provided between the feed pipes 2 between the first feed port 101 and the discharge port 102 of the adjacent reactors 1, and the feed pump 201 is used to transport the material in the reactor 1 to the next reactor 1 for esterification reaction. When the material is transported in the multiple reactors 1 along the feeding direction, it can be transported along the tangent direction of the reaction chamber, ensuring that the material in each reactor 1 can spin; and the multiple reactors 1 are staggered, so that the multiple reactors 1 can be arranged more closely in the feeding direction, reducing the floor space occupied when the multiple reactors 1 are placed, and improving the space utilization rate.

[0023] As attached Figure 2 As shown, a guide groove 3 is provided on the side wall of the reaction chamber, one end of the guide groove 3 is connected to the first feed port 101, and the other end is spirally wound along the circumference of the reaction chamber on the side wall of the reaction chamber and extends to the bottom of the reaction chamber. The guide groove 3 is used for the spin diversion of the material input by the first feed port 101; a pressurizing member 301 is provided at one end of the first feed port 101 close to the guide groove 3. Preferably, in this embodiment, the pressurizing member 301 is a pressurizing nozzle, and the extension direction of the output port of the pressurizing member 301 is consistent with the extension direction of the guide groove 3. When the material is transported into the reaction chamber through the first feed port 101, the material can flow on the inner wall of the reaction chamber with sufficient pressure, ensuring that the material has sufficient spin power in the reaction chamber and the spin effect of the material.

[0024] A spin rod 4 is provided in the reaction chamber, and the specific spin rod 4 is located on the central axis of the reaction chamber, and one end of the spin rod 4 is rotatably connected to the inner wall of the reaction chamber by a rotating shaft; a plurality of first blades 401 and a plurality of second blades 402 are provided on the spin rod 4, and the plurality of first blades 401 and the plurality of second blades 402 are evenly distributed around the axis of the spin rod 4; wherein the first blade 401 is located at one end of the spin rod 4 close to the bottom of the reaction chamber, one end of the first blade 401 is fixedly connected to the spin rod 4 by bolts, and the other end extends away from the spin rod 4, and an inclination angle is provided on the surface of the first blade 401, and the specific structure of the first blade 401 is consistent with the structure of the stirring blade, and will not be repeated here. The second blade 402 is located at the corresponding position of the spin rod 4 and the guide groove 3, wherein one end of the second blade 402 is fixedly connected to the spin rod 4 by bolts, and the other end extends into the guide groove 3; the plane where the second blade 402 is located at one end in the guide groove 3 is perpendicular to the extension direction of the first feed port 101. The second blade 402 can drive the spinning rod 4 and the first blade 401 to rotate under the push of the material in the guide groove 3, so that the first blade 401 can rotate to stir and mix the material without the need for motor drive, thereby improving the uniformity of stirring and mixing between the materials.

[0025] A plurality of guide protrusions 5 are also provided on the side wall of the reaction chamber, and the plurality of guide protrusions 5 are evenly distributed along the circumference of the reaction chamber; the guide protrusions 5 are located at one end of the side wall of the reaction chamber body close to the bottom of the reaction chamber, the guide protrusions 5 protrude from the surface of the side wall of the reaction chamber, and the guide protrusions 5 are fixedly connected to the side wall of the reaction chamber by bolts. The extension direction of the guide protrusions 5 is inclined upward along the rotation direction of the first blade 401, wherein the inclination angle of the guide protrusions 5 is 10°-20°, and preferably in this embodiment, the inclination angle of the guide protrusions 5 is 5°. In the esterification reaction process, the material at the bottom of the reaction chamber can be lifted and rolled upward under the action of the guide protrusions 5, ensuring that the materials in each area of ​​the reaction chamber can be mixed, avoiding the deposition of the materials at the bottom of the reaction chamber, and ensuring the effect of material mixing and esterification reaction.

[0026] The specific implementation process is as follows:

[0027] When methacrylamide sulfate (MAAS) and methanol are subjected to an esterification reaction, raw materials such as methacrylamide sulfate (MAAS) and methanol are transported into the first reactor 1 through the first feed port 101 and the second feed port 103, and the raw materials are mixed and reacted in the first reactor 1; the materials after the preliminary reaction are fed into the next reactor 1 through the discharge port 102 of the reactor 1, and the materials are supplemented and added into the reaction chamber through the second feed port 103 of the reactor 1; the materials are fully esterified after passing through multiple reactors 1 and are output to the next processing step, wherein when the materials enter the reaction chamber, the materials from the first feed port 101 are fed along the tangent of the reaction chamber, so that the materials can spiral along the side wall of the reaction chamber under the action of the guide groove 3 in the reaction chamber, so that the materials can spin in the reaction chamber, and the materials are mixed; and by arranging a spinning rod 4 in the reaction chamber, the second blade 402 is driven by the power of the material input to realize the rotation of the spinning rod 4 and the first blade 401, so as to further stir and mix the materials in the reaction chamber.

[0028] Compared with the prior art, in this solution, the feed port and the discharge port 102 of the reactor 1 are distributed along the tangent of the reaction chamber, so that when the material is input into the reaction chamber, the material can generate spin in the reaction chamber, thereby achieving mixing between the materials; and by arranging the second blade 402 on the spinning rod 4, the pressure when the material is input into the reaction chamber through the first feed port 101 is converted into the power for the spinning rod 4 and the first blade 401 to rotate, thereby achieving further stirring of the material, ensuring the uniformity of the mixing of the materials in the reaction chamber, and improving the effect of the esterification reaction; and reducing the structure of the stirring device driven by the motor on the reactor 1, avoiding short production and processing stops due to failures of the motor and the stirring device during the long-term operation during the esterification reaction, ensuring that the reactor 1 can continuously carry out the esterification reaction processing, and improving the efficiency of the esterification reaction processing.

[0029] The above are only embodiments of the present invention, and the common knowledge such as the known specific technical solutions and / or characteristics in the solution are not described in detail here. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the technical solution of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. An esterification reaction structure, characterized in that: The invention comprises a plurality of reactors which are sequentially arranged along a feeding direction; a reaction chamber for esterification reaction is arranged in the reactor, a first feed port, a second feed port and a discharge port which are connected to the reaction chamber are provided on the reactor, the first feed port and the discharge port are located on the side of the reactor, the central axes of the first feed port and the discharge port are located on the tangent of the reaction chamber, a guide groove is provided on the side wall of the reaction chamber, one end of the guide groove is connected to the first feed port, and the other end is spirally coiled along the circumference of the reaction chamber, and the guide groove is used for spin diversion of the material input from the first feed port.

2. An esterification reaction structure according to claim 1, characterized in that: The multiple reactors are staggeredly distributed along the feeding direction, and the first feed port of the reactor at the rear end in the feeding direction is connected to the discharge port of the reactor adjacent to the front end in the feeding direction.

3. An esterification reaction structure according to claim 2, characterized in that: A feeding pump is arranged between the first feeding port and the discharging port of adjacent reaction kettles.

4. An esterification reaction structure according to claim 1, characterized in that: A pressure piece is provided at one end of the first feed port close to the guide groove, and an extension direction of an output port of the pressure piece is consistent with an extension direction of the guide groove.

5. An esterification reaction structure according to claim 1, characterized in that: A spinning rod is rotatably connected in the reaction chamber, and a plurality of first blades and a plurality of second blades are provided on the spinning rod, and the plurality of first blades and the plurality of second blades are evenly distributed around the axis of the spinning rod. The first blade is located at one end of the spinning rod close to the bottom of the reaction chamber, and the second blade is located at a corresponding position between the spinning rod and the guide groove, and the second blade extends away from one end of the spinning rod into the guide groove.

6. An esterification reaction structure according to claim 5, characterized in that: The plane where one end of the second blade is located in the guide groove is perpendicular to the extension direction of the first feed port.

7. An esterification reaction structure according to claim 5, characterized in that: A plurality of flow-guiding protrusions are arranged on the side wall of the reaction chamber, and the plurality of flow-guiding protrusions are evenly distributed along the circumference of the reaction chamber.

8. An esterification reaction structure according to claim 7, characterized in that: The extending direction of the guide protrusion is inclined upward along the rotation direction of the first blade, and the inclination angle of the guide protrusion is 10°-20°.

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