CN218924658U - System for improve butyl acrylate esterification kettle material polymerization - Google Patents
System for improve butyl acrylate esterification kettle material polymerization Download PDFInfo
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- CN218924658U CN218924658U CN202320180594.3U CN202320180594U CN218924658U CN 218924658 U CN218924658 U CN 218924658U CN 202320180594 U CN202320180594 U CN 202320180594U CN 218924658 U CN218924658 U CN 218924658U
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Abstract
The utility model belongs to the technical field of esterification reaction systems, and particularly relates to a system for improving polymerization of butyl acrylate esterification kettle materials. The system for improving the polymerization of butyl acrylate esterification kettle materials comprises: an alcohol inlet pipeline is arranged on the dehydration tower, the preheated alcohol pipeline a is connected with the first esterification kettle, and the preheated alcohol pipeline c is connected with the cavity a of the second esterification kettle; the dehydration tower is provided with a vapor phase pipeline a and a vapor phase pipeline b; a vapor phase pipeline c is arranged on the dehydration tower; a polymerization inhibition air pipeline b is arranged in the cavity b of the first esterification kettle; a cavity a of the second esterification kettle is provided with a polymerization inhibition air pipeline c; the cavity b of the first esterification kettle is connected with the cavity a of the second esterification kettle; a polymerization inhibitor pipeline a is arranged on the cavity a of the first esterification kettle, a polymerization inhibitor pipeline b is arranged on the dehydration tower, and a reflux pipeline is arranged between the dehydration tower and the cavity b of the first esterification kettle. The system for improving the polymerization of the butyl acrylate esterification kettle materials, provided by the utility model, is energy-saving, consumption-reducing and high in practicability.
Description
Technical Field
The utility model belongs to the technical field of esterification reaction systems, and particularly relates to a system for improving polymerization of butyl acrylate esterification kettle materials.
Background
The reaction of butanol and acrylic acid to butyl acrylate is typically a reversible reaction. The product contains excessive butanol and unreacted complete acrylic acid, and the acrylic acid and butyl acrylate are very easy to polymerize, but in actual production, if excessive polymers are generated in equipment, pipelines are blocked, normal operation cannot be carried out, process parameters cannot be controlled in a normal range, and the equipment can not normally and continuously run due to severe shutdown, so that the quality and the yield of the product are affected; the parking maintenance is also difficult to clean and process, and a large amount of manpower and material resources are consumed.
CN217140301U discloses a butyl acrylate device esterifies recovery and utilization equipment of cauldron system steam, including butanol feed line, dehydration tower, paratoluenesulfonic acid feed line, acrylic acid feed line and first cauldron that esterifies, butanol feed line is connected with the dehydration tower, and paratoluenesulfonic acid feed line and acrylic acid feed line all are connected with first cauldron that esterifies, and the top of first cauldron that esterifies is connected with the dehydration tower, and the bottom of dehydration tower is connected with first cauldron that esterifies, and the top of dehydration tower is connected with first level condenser and second level condenser in proper order, and first level condenser and second level condenser all are connected with the recovery jar, and the recovery jar is connected with dehydration tower and first cauldron that esterifies respectively. The patent only solves the recycling and utilization of the steam of the esterification kettle system, but does not relate to the problem of how to solve the material polymerization of the esterification kettle system, so the patent still has the problem of blockage caused by the material polymerization.
Disclosure of Invention
The utility model aims to solve the technical problems of overcoming the defects of the prior art, and provides a system for improving the polymerization of butyl acrylate esterification kettle materials, which effectively reduces the polymerization degree of the materials in the esterification kettle system, saves energy, reduces consumption and has strong practicability.
The utility model relates to a system for improving the polymerization of butyl acrylate esterification kettle materials, which comprises: comprises a first esterification kettle, a second esterification kettle and a dehydration tower; the first esterification kettle and the second esterification kettle are divided into an a cavity and a b cavity; the dehydration tower is provided with an alcohol inlet pipeline, the bottom of the dehydration tower is divided into two paths, one path is a preheated alcohol pipeline a, the preheated alcohol pipeline a is connected with the cavity a of the first esterification kettle, the other path is a preheated alcohol pipeline c, and the preheated alcohol pipeline c is connected with the cavity a of the second esterification kettle; the lower part of the dehydration tower is provided with a vapor phase pipeline a and a vapor phase pipeline b, the vapor phase pipeline a is connected with the cavity a of the first esterification kettle, and the vapor phase pipeline b is connected with the cavity a of the second esterification kettle; a vapor phase pipeline c is arranged on the dehydration tower;
the first esterification kettle is connected with a reboiler; a polymerization inhibition air pipeline a is arranged on the reboiler; a polymerization inhibition air pipeline b is arranged in the cavity b of the first esterification kettle; a cavity a of the second esterification kettle is provided with a polymerization inhibition air pipeline c; a polymerization inhibition air pipeline d is arranged in the cavity b of the second esterification kettle; the cavity b of the first esterification kettle is connected with the cavity a of the second esterification kettle; a polymerization inhibitor pipeline a is arranged on the cavity a of the first esterification kettle, a polymerization inhibitor pipeline b is arranged on the dehydration tower, and a reflux pipeline is arranged between the dehydration tower and the cavity b of the first esterification kettle.
Preferably, the reboiler is provided with an acrylic acid pipeline and a catalyst pipeline, the converged pipelines are connected with the a cavity of the first esterification kettle, and the connected pipelines are provided with a circulating pump.
Preferably, the reflux line is connected with a spray line a, which is connected with the b cavity of the first esterification reactor.
Preferably, the return line is provided with a pneumatic valve.
Preferably, the return line is further provided with a recycle alcohol line.
Preferably, the pipeline connecting the cavity b of the first esterification kettle and the cavity a of the second esterification kettle is an overflow pipeline.
Preferably, a spray pipeline b is arranged on the second esterification kettle, and the spray pipeline b is connected with a b cavity of the second esterification kettle through a spray pump.
Preferably, the b cavity of the second esterification kettle is connected with the vapor phase pipeline a through a discharging pump.
Preferably, the line between the discharge pump and the vapor phase line a is a shower line c.
According to the system for improving the polymerization of butyl acrylate esterification kettle materials, under the condition that the vacuum of an esterification kettle is-24 KPa, raw butanol enters a dehydration tower through an alcohol inlet pipeline to exchange heat and dehydrate with steam in two vapor phase pipelines a and vapor phase pipelines b rising from the kettle, and the butanol after heat exchange enters a cavity a of a first esterification kettle and a cavity a of a second esterification kettle from the bottom of the dehydration tower through a preheated alcohol pipeline a and a preheated alcohol pipeline c at the bottom of the dehydration tower respectively; vapor phase line c at the top of the dehydration tower enters a condenser to be condensed. Meanwhile, the acrylic acid enters a reboiler through an acrylic acid pipeline together with the catalyst through a catalyst pipeline to be heated, then enters the cavity a of the first esterification kettle through a reboiler outlet pipeline, and reacts in the esterification kettle at a certain temperature.
The polymerization inhibition air entering the esterification kettle system is divided into four paths: a polymerization inhibition air pipeline a of the reboiler is filled with polymerization inhibition air with a certain flow; in addition, three paths of polymerization inhibition air enter from the bottom of the cavity b of the first esterification kettle, enter from the bottom of the cavity a of the second esterification kettle, and enter from the bottom of the cavity b of the second esterification kettle. The polymerization inhibitor entering the esterification kettle system is divided into two paths: one path of polymerization inhibitor directly enters the cavity of the first esterification kettle a through a polymerization inhibitor pipeline a; the other polymerization inhibitor is converged by the polymerization inhibitor pipeline b and the reflux of the dehydration tower top, and the polymerization inhibitor pipeline b and the reflux of the dehydration tower top are used for cooling the dehydration tower top together.
The cavity a of the first esterification kettle circulates materials through a circulating pump of the first esterification kettle; the top of the b cavity of the first esterification kettle is sprayed through a b cavity spraying pipeline a of the first esterification kettle, and is provided by a recovered alcohol pipeline; spraying at the top of the cavity a and the cavity b of the second esterification kettle is performed through a spraying pipeline b, and a spraying pump of the second esterification kettle is used for spraying; spraying of the vapor phase pipeline a rising from the first esterification kettle and the vapor phase pipeline b rising from the second esterification kettle is performed through a vapor phase spraying pipeline c, and is provided by a discharging pump of the second esterification kettle.
Along with the progress of reaction, the material overflows to the second esterification kettle through the overflow pipeline continuously, and when the conversion rate of acrylic acid in the cavity b of the second esterification kettle is higher than 99.5%, the material is conveyed to a next-stage device by a second esterification kettle discharge pump.
Compared with the prior art, the utility model has the following beneficial effects:
(1) The system for improving the polymerization of the butyl acrylate esterification kettle materials is simple to operate, high in practicability and low in cost.
(2) According to the system for improving the polymerization of the butyl acrylate esterification kettle materials, disclosed by the utility model, the polymerization inhibitor is added to the top of the esterification kettle and the reflux pipeline at the top of the esterification kettle, so that the polymerization degree of the materials in the esterification kettle system is effectively reduced.
(3) The system for improving the polymerization of the butyl acrylate esterification kettle material provides a negative pressure environment, reduces the temperature required for heating the material, and can lighten the polymerization of the material. Meanwhile, the boiling point of materials is reduced in the negative pressure environment, the energy consumption is reduced, and the cost is saved.
(4) According to the system for improving the polymerization of butyl acrylate esterification kettle materials, polymerization inhibition air is introduced into the reboiler and the bottom of the esterification kettle, so that polymerization caused by polymerization blockage of the reboiler and formation of dead zones at the bottom of the esterification kettle is effectively prevented, and the dispersion polymerization inhibition effect is achieved.
Drawings
FIG. 1 is a schematic diagram of a system for improving the polymerization of butyl acrylate esterification kettle materials in accordance with the present utility model;
in the figure: 1. a first esterification tank; 2. a second esterification tank; 3. a circulation pump; 4. a spray pump; 5. a discharge pump; 6. a reboiler; 7. a dehydration tower; 8. an acrylic line; 9. a catalyst line; 10. a polymerization-inhibiting air line a; 11. polymerization inhibitor line a; 12. polymerization inhibitor line b; 13. an alcohol inlet line; 14. vapor phase line a; 15. vapor phase line b; 16. vapor phase line c; 17. a return line; 18. recovering the alcohol line; 19. a spray pipeline a; 20. a spray line b; 21. a spray line c; 22. a polymerization-inhibiting air line b; 23. a polymerization-inhibiting air line c; 24. a polymerization-inhibiting air line d; 25. a preheated alcohol line a; 26. a preheated alcohol line c; 27. an overflow line; 28. and a pneumatic valve.
Detailed Description
The utility model is further illustrated below with reference to examples.
Examples
As shown in FIG. 1, the system for improving the polymerization of butyl acrylate esterification kettle materials according to the utility model comprises: comprises a first esterification kettle 1, a second esterification kettle 2 and a dehydration tower 7; the first esterification kettle 1 and the second esterification kettle 2 are divided into an a cavity and a b cavity; the dehydration tower 7 is provided with an alcohol inlet pipeline 13, the bottom of the dehydration tower 7 is divided into two paths, one path is a preheated alcohol pipeline a25, the preheated alcohol pipeline a25 is connected with the a cavity of the first esterification kettle 1, the other path is a preheated alcohol pipeline c26, and the preheated alcohol pipeline c26 is connected with the a cavity of the second esterification kettle 2; the lower part of the dehydration tower 7 is provided with a vapor phase pipeline a14 and a vapor phase pipeline b15, the vapor phase pipeline a14 is connected with the a cavity of the first esterification kettle 1, and the vapor phase pipeline b15 is connected with the a cavity of the second esterification kettle 2; the dehydration tower 7 is provided with a vapor phase pipeline c16;
the first esterification kettle 1 is connected with a reboiler 6; a polymerization inhibition air pipeline a10 is arranged on the reboiler 6; the cavity b of the first esterification kettle 1 is provided with a polymerization inhibition air pipeline b22; the cavity a of the second esterification kettle 2 is provided with a polymerization inhibition air pipeline c23; the cavity b of the second esterification kettle 2 is provided with a polymerization inhibition air pipeline d24; the cavity b of the first esterification kettle 1 is connected with the cavity a of the second esterification kettle 2; a polymerization inhibitor pipeline a11 is arranged on the cavity a of the first esterification kettle 1, a polymerization inhibitor pipeline b12 is arranged on the dehydration tower 7, and a reflux pipeline 17 is arranged between the dehydration tower 7 and the cavity b of the first esterification kettle 1.
The reboiler 6 is provided with an acrylic acid pipeline 8 and a catalyst pipeline 9, the converged pipelines are connected with the a cavity of the first esterification kettle 1, and the connected pipelines are provided with a circulating pump 3.
The reflux line 17 is connected with a spray line a19, and the spray line a19 is connected with the b cavity of the first esterification reactor 1.
The return line 17 is provided with a pneumatic valve 28.
The reflux line 17 is also provided with a recycle alcohol line 18.
The pipeline connecting the b cavity of the first esterification kettle 1 and the a cavity of the second esterification kettle 2 is an overflow pipeline 27.
The second esterification kettle 2 is provided with a spray pipeline b20, and the spray pipeline b20 is connected with the b cavity of the second esterification kettle 2 through a spray pump 4.
The b cavity of the second esterification kettle 2 is connected with a vapor phase pipeline a14 through a discharge pump 5.
The line between the discharge pump 5 and the vapor phase line a14 is a shower line c21.
According to the system for improving the polymerization of butyl acrylate esterification kettle materials, under the condition that the vacuum of an esterification kettle is-24 KPa, raw butanol enters a dehydration tower 7 through an alcohol inlet pipeline 13, and is subjected to heat exchange dehydration with steam in two vapor phase pipelines a14 and b15 rising from the kettle, and the butanol subjected to heat exchange enters a cavity a of a first esterification kettle 1 and a cavity a of a second esterification kettle 2 from the bottom of the dehydration tower 7 through a preheated alcohol pipeline a25 and a preheated alcohol pipeline c26 at the bottom of the dehydration tower respectively; vapor phase line c16 at the top of the dehydration column 7 enters a condenser to be condensed. Meanwhile, the acrylic acid enters the reboiler 6 through the acrylic acid pipeline 8 together with the catalyst through the catalyst pipeline 9 for heating, then enters the cavity a of the first esterification kettle 1 through the outlet pipeline of the reboiler 6, and reacts in the esterification kettle at a certain temperature.
The polymerization inhibition air entering the esterification kettle system is divided into four paths: a polymerization inhibition air pipeline a10 of the reboiler 6 is filled with polymerization inhibition air with a certain flow; in addition, three paths of polymerization inhibition air enter a polymerization inhibition air pipeline b22 at the bottom of the cavity b of the first esterification kettle 1, a polymerization inhibition air pipeline c23 at the bottom of the cavity a of the second esterification kettle 2 and a polymerization inhibition air pipeline d24 at the bottom of the cavity b of the second esterification kettle 2 respectively. The polymerization inhibitor entering the esterification kettle system is divided into two paths: one path of polymerization inhibitor directly enters the cavity a of the first esterification kettle through a polymerization inhibitor pipeline a 11; the other polymerization inhibitor is converged by the polymerization inhibitor pipeline b12 and the top reflux of the dehydration tower 7 and used for cooling the top of the dehydration tower 7 together through the dehydration tower top reflux pipeline 17.
The cavity a of the first esterification kettle 1 circulates materials through a circulating pump 3 of the first esterification kettle 1; the top of the b cavity of the first esterification kettle 1 is sprayed through a b spraying pipeline a19 of the first esterification kettle 1 and is provided by a recovered alcohol pipeline 18; spraying at the top of the cavity a and the cavity b of the second esterification kettle 2 is performed through a spraying pipeline b20, and the spraying is from a second esterification kettle spraying pump 4; the spraying of the rising vapor phase line a14 of the first esterification reactor 1 and the rising vapor phase line b15 of the second esterification reactor 2 is performed by the vapor phase spraying line c21, and is provided by the discharge pump 5 of the second esterification reactor 2.
As the reaction proceeds, the material continuously overflows to the second esterification reactor 2 through the overflow line 27, and when the conversion rate of acrylic acid in the cavity of the second esterification reactor 2b is higher than 99.5%, the material is conveyed to the next-stage device by the second esterification reactor discharge pump 5.
Of course, the foregoing is merely preferred embodiments of the present utility model and is not to be construed as limiting the scope of the embodiments of the present utility model. The present utility model is not limited to the above examples, and those skilled in the art will appreciate that the present utility model is capable of equally varying and improving within the spirit and scope of the present utility model.
Claims (9)
1. A system for improving butyl acrylate esterification kettle material polymerization is characterized in that: comprises a first esterification kettle (1), a second esterification kettle (2) and a dehydration tower (7); the first esterification kettle (1) and the second esterification kettle (2) are divided into an a cavity and a b cavity; an alcohol inlet pipeline (13) is arranged on the dehydration tower (7), the bottom of the dehydration tower (7) is divided into two paths, one path is a preheated alcohol pipeline a (25), the preheated alcohol pipeline a (25) is connected with an a cavity of the first esterification kettle (1), the other path is a preheated alcohol pipeline c (26), and the preheated alcohol pipeline c (26) is connected with an a cavity of the second esterification kettle (2); the lower part of the dehydration tower (7) is provided with a vapor phase pipeline a (14) and a vapor phase pipeline b (15), the vapor phase pipeline a (14) is connected with the cavity a of the first esterification kettle (1), and the vapor phase pipeline b (15) is connected with the cavity a of the second esterification kettle (2); a vapor phase pipeline c (16) is arranged on the dehydration tower (7);
the first esterification kettle (1) is connected with a reboiler (6); a polymerization inhibition air pipeline a (10) is arranged on the reboiler (6); a polymerization inhibition air pipeline b (22) is arranged in the cavity b of the first esterification kettle (1); the cavity a of the second esterification kettle (2) is provided with a polymerization inhibition air pipeline c (23); a polymerization inhibition air pipeline d (24) is arranged in the cavity b of the second esterification kettle (2); the cavity b of the first esterification kettle (1) is connected with the cavity a of the second esterification kettle (2); a polymerization inhibitor pipeline a (11) is arranged on the cavity a of the first esterification kettle (1), a polymerization inhibitor pipeline b (12) is arranged on the dehydration tower (7), and a reflux pipeline (17) is arranged between the dehydration tower (7) and the cavity b of the first esterification kettle (1).
2. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 1, wherein: an acrylic acid pipeline (8) and a catalyst pipeline (9) are arranged on the reboiler (6), the converged pipelines are connected with the a cavity of the first esterification kettle (1), and a circulating pump (3) is arranged on the connected pipelines.
3. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 1, wherein: the reflux pipeline (17) is connected with a spray pipeline a (19), and the spray pipeline a (19) is connected with the cavity b of the first esterification kettle (1).
4. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 3, wherein: a pneumatic valve (28) is arranged on the return line (17).
5. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 3, wherein: the reflux pipeline (17) is also provided with a recovered alcohol pipeline (18).
6. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 1, wherein: the pipeline connecting the cavity b of the first esterification kettle (1) and the cavity a of the second esterification kettle (2) is an overflow pipeline (27).
7. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 1, wherein: the second esterification kettle (2) is provided with a spray pipeline b (20), and the spray pipeline b (20) is connected with a b cavity of the second esterification kettle (2) through a spray pump (4).
8. The system for improving polymerization of butyl acrylate esterification kettle materials according to claim 7, wherein: the cavity b of the second esterification kettle (2) is connected with a vapor phase pipeline a (14) through a discharge pump (5).
9. The system for improving the polymerization of butyl acrylate esterification kettle materials according to claim 8, wherein: the pipeline between the discharge pump (5) and the vapor phase pipeline a (14) is a spray pipeline c (21).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320180594.3U CN218924658U (en) | 2023-02-07 | 2023-02-07 | System for improve butyl acrylate esterification kettle material polymerization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320180594.3U CN218924658U (en) | 2023-02-07 | 2023-02-07 | System for improve butyl acrylate esterification kettle material polymerization |
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| CN218924658U true CN218924658U (en) | 2023-04-28 |
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| CN202320180594.3U Active CN218924658U (en) | 2023-02-07 | 2023-02-07 | System for improve butyl acrylate esterification kettle material polymerization |
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- 2023-02-07 CN CN202320180594.3U patent/CN218924658U/en active Active
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