Reaction kettle for solvent method acrylic acid solid resin

Abstract

The utility model discloses a reaction kettle for solvent method acrylic acid solid resin, which comprises a reaction kettle body and a heating component, and a stirrer is arranged in the middle of the inside of the reaction kettle body; comprising a solvent removing mechanism connected with a reaction kettle body, the solvent removing mechanism comprises a nitrogen filling assembly and a negative pressure extraction assembly, the nitrogen filling assembly comprises a nitrogen channel and a nitrogen generator, the nitrogen channel is arranged between the inner wall of the reaction kettle body and a stirrer, and the gas inlet end of the nitrogen channel is located outside the reaction kettle body and connected with the nitrogen generator; a plurality of air holes are formed in the nitrogen channel; and the negative pressure extraction assembly is connected with the reaction kettle body. The solvent removing mechanism is arranged, after resin synthesis is finished, nitrogen is introduced into the reaction kettle body, a large number of bubbles are formed in the resin through the nitrogen, vaporized solvent makes contact with and is mixed with the bubbles, and then the nitrogen mixed with the solvent is extracted out of the reaction kettle body through the negative pressure extraction assembly; therefore, the solvent can be more easily extracted from the resin, and the reacted solvent can be removed with high efficiency and low cost.

Description

Technical Field

[0001] The utility model relates to the technical field of reaction kettles, in particular to a reaction kettle for solvent-processed acrylic acid solid resin. Background Art

[0002] In recent years, with the implementation of national environmental protection policies and the enhancement of people's environmental awareness, water-based products have gradually replaced solvent-based products.

[0003] The production process of solvent-based styrene-acrylic acid solid resin is a method that uses monomers such as acrylic acid, styrene, and acrylate as raw materials and conducts semi-continuous polymerization in ether and alcohol solvents through an initiator to prepare alkaline water-soluble styrene-acrylic acid solid resin.

[0004] This process has the characteristics of high conversion rate and low reaction temperature, but the solvent in the reactor needs to be pumped out after the reaction. Since the solvent will participate in the polymerization, the amount of solvent will gradually decrease as the reaction proceeds, and the molecular weight of the resin will gradually increase. After the reaction, the resin has a high viscosity, and the reactor needs to be heated, stirred, and vacuumed to remove the residual solvent. This process is relatively long, often taking several hours, and it is also easy for solvent residues to remain.

[0005] Therefore, it is urgent to design a solvent-based acrylic solid resin reactor to remove the solvent after the reaction efficiently and at low cost. Utility Model Content

[0006] In order to solve the above problems, the technical solutions adopted by the utility model are as follows:

[0007] A reaction kettle for solvent-processed acrylic solid resin, comprising a reaction kettle body, characterized in that a feed inlet and a discharge port are arranged on the reaction kettle body, and a stirrer for stirring the resin is arranged in the middle of the reaction kettle body;

[0008] It includes a heating component for heating the reaction vessel body;

[0009] It includes a desolventizing mechanism connected to the reactor body, the desolventizing mechanism includes a nitrogen charging component and a negative pressure extraction component, the nitrogen charging component includes a nitrogen channel and a nitrogen generator, the nitrogen channel is arranged between the inner wall of the reactor body and the agitator, the air inlet end of the nitrogen channel is located outside the reactor body and connected to the nitrogen generator, and the nitrogen channel is provided with a plurality of air holes distributed from one end to the other end;

[0010] The negative pressure extraction component is connected to the upper end of the reaction kettle body, and the negative pressure extraction component is used to extract the vaporized solvent in the reaction kettle body.

[0011] Preferably, the nitrogen channel includes one or more air pipes, and the air holes are arranged on the air pipes.

[0012] Preferably, the air pipe is a spiral coil.

[0013] Preferably, the spiral coil is connected to the inner wall of the reactor body, and the air holes of the spiral coil are arranged on the surface of the spiral coil that is not connected to the reactor body.

[0014] Preferably, a check valve is provided on the air hole to prevent the resin from entering the air pipe through the air hole.

[0015] Preferably, the negative pressure extraction component includes a vacuum pump connected to the interior of the reaction kettle.

[0016] Preferably, the heating assembly comprises a heating jacket which is in contact with the outer wall of the reaction vessel body.

[0017] Preferably, the stirrer comprises a stirring shaft, a stirring blade and a stirring motor, wherein the stirring shaft is arranged in the middle of the reactor body, one end of the stirring shaft is located inside the reactor body, and the other end is located outside the reactor body and connected to the stirring motor; the stirring blade is arranged at the end of the stirring shaft located inside the reactor body;

[0018] The nitrogen channel is located between the reaction kettle body and the stirring blade.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] In the utility model, a desolventizing mechanism is arranged in the reaction kettle body. After the resin synthesis is completed, nitrogen is introduced into the reaction kettle body through the nitrogen filling component. The nitrogen forms a large number of bubbles in the resin, and the vaporized solvent contacts and mixes with the bubbles. Then, the nitrogen mixed with the solvent is extracted from the reaction kettle body through the negative pressure extraction component; thus, the solvent is more easily extracted from the resin, thereby achieving the effects of improving efficiency, saving time, reducing solvent residues, and reducing energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a partial enlarged schematic diagram of the trachea in the utility model;

[0023] Wherein: reaction kettle body 1, stirrer 2, desolventizing mechanism 3, nitrogen filling component 4, negative pressure extraction component 5, check valve 6, heating jacket 7, air hole 10, feed inlet 11, discharge port 12, stirring shaft 21, stirring blade 22, stirring motor 23, air pipe 41, nitrogen generator 42, vacuum pump 51. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively with reference to the accompanying drawings. The accompanying drawings provide preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon at the same time. The terms "vertical", "horizontal", "left", "right", "up", "down", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] Below, in conjunction with the accompanying drawings and specific implementation methods, the utility model is further described:

[0028] like Figure 1-2 As shown, a solvent-process acrylic solid resin reactor comprises a reactor body 1, wherein the reactor body 1 is provided with a feed inlet 11 and a discharge port 12, and a stirrer 2 for stirring the resin is provided in the middle of the reactor body 1;

[0029] It includes a heating component for heating the reaction kettle body 1;

[0030] The invention comprises a desolventizing mechanism 3 connected to the reactor body 1, wherein the desolventizing mechanism 3 comprises a nitrogen charging component 4 and a negative pressure extraction component 5, wherein the nitrogen charging component 4 comprises a nitrogen channel and a nitrogen generator 42, wherein the nitrogen channel is arranged between the inner wall of the reactor body 1 and the agitator 2, wherein the air inlet end of the nitrogen channel is located outside the reactor body 1 and connected to the nitrogen generator 42, and wherein a plurality of air holes 10 distributed from one end to the other end are arranged on the nitrogen channel;

[0031] The negative pressure extraction component 5 is connected to the upper end of the reaction kettle body 1 , and the negative pressure extraction component 5 is used to extract the vaporized solvent inside the reaction kettle body 1 .

[0032] In this embodiment, after the resin synthesis is completed, nitrogen is introduced into the reactor body 1 through the nitrogen filling component 4, and the nitrogen enters the viscous resin through the air hole 10, so that a large number of bubbles are formed in the resin, and the vaporized solvent contacts and mixes with the bubbles, and then the nitrogen mixed with the solvent is extracted from the reactor body 1 through the negative pressure extraction component 5;

[0033] During the process, the stirrer 2 runs at a low speed so that the residual vaporized solvent is fully mixed into the bubbles and fully separated from the resin; thereby making it easier to extract the solvent from the resin, thereby achieving the effects of improving efficiency, saving time, reducing solvent residues, and reducing energy consumption.

[0034] Further, such as Figure 2 As shown, the nitrogen passage includes one or more air pipes 41 , and the air holes 10 are disposed on the air pipes 41 .

[0035] In this embodiment, the above structure and the appropriate increase in the number of air pipes 41 can further improve the desolventizing efficiency.

[0036] Further, such as Figure 1 , 2 As shown, the air pipe 41 is a spiral coil.

[0037] In this embodiment, the above structure increases the contact area between the air pipe 41 and the resin, allowing nitrogen to enter the resin at different positions, thereby mixing the vaporized solvent remaining at different positions in the resin with the bubbles formed by the nitrogen, further improving the desolvation efficiency and effect.

[0038] Furthermore, the spiral coil is connected to the inner wall of the reactor body 1 , and the air holes 10 of the spiral coil are arranged on the surface of the spiral coil that is not connected to the reactor body 1 .

[0039] In this embodiment, in order to improve the nitrogen filling effect, the plurality of air holes 10 are first distributed around the axis of the spiral coil to form a group of air holes 10, and then the formed plurality of air holes 10 groups are distributed along the spiral coil from one end to the other end of the spiral coil.

[0040] Further, such as Figure 2 As shown, the air hole 10 is provided with a check valve 6 to prevent the resin from entering the air pipe 41 through the air hole 10 .

[0041] In this embodiment, the above structure can prevent the resin from entering the air pipe 41 and accumulating and clogging it, thereby improving the effectiveness of nitrogen entering the reactor body 1.

[0042] Further, such as Figure 1 As shown, the negative pressure extraction component 5 includes a vacuum pump 51 connected to the interior of the reaction kettle body 1.

[0043] In this embodiment, in order to improve efficiency and reduce cost, the above structure reduces pressure by vacuum pump 51 to extract nitrogen mixed with vaporized solvent.

[0044] Further, such as Figure 1 As shown, the heating assembly includes a heating jacket 7 which is in contact with the outer wall of the reaction vessel body 1 .

[0045] In this embodiment, the above structure improves the heating efficiency of the reaction kettle body 1.

[0046] Further, such as Figure 1 As shown, the stirrer 2 includes a stirring shaft 21, a stirring blade 22 and a stirring motor 23. The stirring shaft 21 is arranged in the middle of the reaction kettle body 1, one end of the stirring shaft 21 is located inside the reaction kettle body 1, and the other end is located outside the reaction kettle body 1 and connected to the stirring motor 23; the stirring blade 22 is arranged at the end of the stirring shaft 21 located inside the reaction kettle body 1;

[0047] The nitrogen channel is located between the reaction kettle body 1 and the stirring blade 22 .

[0048] In this embodiment, the above structure allows the vaporized solvent to be fully mixed with nitrogen under the stirring of the stirring blade 22 and fully separated from the resin under the action of the negative pressure extraction component 5.

[0049] For those skilled in the art, various other corresponding changes and deformations can be made according to the technical solutions and concepts described above, and all of these changes and deformations should fall within the scope of protection of the claims of the utility model patent.

Claims

1. A solvent-based acrylic solid resin reactor, comprising a reactor body, characterized in that: The reactor body is provided with a feed inlet and a discharge outlet, and a stirrer for stirring the resin is provided in the middle of the reactor body; It includes a heating component for heating the reaction vessel body; It includes a desolventizing mechanism connected to the reactor body, the desolventizing mechanism includes a nitrogen charging component and a negative pressure extraction component, the nitrogen charging component includes a nitrogen channel and a nitrogen generator, the nitrogen channel is arranged between the inner wall of the reactor body and the agitator, the air inlet end of the nitrogen channel is located outside the reactor body and connected to the nitrogen generator, and the nitrogen channel is provided with a plurality of air holes distributed from one end to the other end; The negative pressure extraction component is connected to the upper end of the reaction kettle body, and the negative pressure extraction component is used to extract the vaporized solvent in the reaction kettle body.

2. A solvent-process acrylic acid solid resin reaction kettle according to claim 1, characterized in that, The nitrogen channel includes one or more air pipes, and the air holes are arranged on the air pipes.

3. A solvent-process acrylic acid solid resin reaction kettle according to claim 2, characterized in that, The air pipe is a spiral coil.

4. A solvent-based acrylic solid resin reaction kettle according to claim 3, characterized in that: The spiral coil is connected to the inner wall of the reactor body, and the air holes of the spiral coil are arranged on the surface of the spiral coil that is not connected to the reactor body.

5. A solvent-based acrylic solid resin reaction kettle according to claim 2, characterized in that: The air hole is provided with a check valve to prevent the resin from entering the air pipe through the air hole.

6. A reaction kettle for solvent-process acrylic solid resin according to claim 1, characterized in that: The negative pressure extraction component includes a vacuum pump connected to the interior of the reaction kettle.

7. A reaction kettle for solvent-process acrylic solid resin according to claim 1, characterized in that: The heating assembly comprises a heating jacket which is in contact with the outer side wall of the reaction kettle body.

8. A reaction kettle for solvent-process acrylic solid resin according to claim 1, characterized in that: The stirrer comprises a stirring shaft, a stirring blade and a stirring motor, wherein the stirring shaft is arranged in the middle of the reactor body, one end of the stirring shaft is located inside the reactor body, and the other end is located outside the reactor body and connected to the stirring motor; the stirring blade is arranged at the end of the stirring shaft located inside the reactor body; The nitrogen channel is located between the reaction kettle body and the stirring blade.

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