CN212284002U - Dispersing and mixing device for polymerizing polyamic acid - Google Patents
Dispersing and mixing device for polymerizing polyamic acid Download PDFInfo
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- CN212284002U CN212284002U CN202020603321.1U CN202020603321U CN212284002U CN 212284002 U CN212284002 U CN 212284002U CN 202020603321 U CN202020603321 U CN 202020603321U CN 212284002 U CN212284002 U CN 212284002U
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Abstract
A dispersing and mixing device for polymerizing polyamic acid relates to the technical field of polymerizing dispersing and mixing devices, and comprises a reaction kettle, wherein the upper part of the reaction kettle is provided with a feed inlet, the side wall of the reaction kettle is provided with a circulating liquid inlet, the bottom of the reaction kettle is provided with a circulating liquid outlet, the circulating liquid inlet and the circulating liquid outlet of the reaction kettle are communicated through a circulating pipeline, and a conveying pump is arranged on the circulating pipeline; a pressure feed pipeline communicated with the circulating pipeline is arranged on the circulating pipeline close to the circulating liquid inlet of the reaction kettle, and a pressure feed pump and a flow meter are arranged on the pressure feed pipeline. The polymerization stock solution at the bottom in the reaction kettle circularly flows through the circulating pipeline, so that the polymerization stock solution at the bottom in the reaction kettle can be prevented from settling and caking; arranging a pressure feed pipeline on the circulating pipeline, so that dianhydride in the pressure feed pipeline is firstly dispersed and mixed with the polymerization stock solution in the circulating pipeline and then flows into the reaction kettle together; the dispersion is uniform, the reaction is controlled to be uniform and stable, and local sudden aggregation and raw material agglomeration of polymerization are avoided.
Description
Technical Field
The utility model belongs to the technical field of polymerization dispersion mixing arrangement technique and specifically relates to a dispersion mixing arrangement for polyamic acid polymerization.
Background
The conventional polyamic acid is polymerized by adding dianhydride into a reaction kettle through a charging opening, and the dianhydride and diamine solution are subjected to polymerization reaction, and when the polymerization degree is lower in the early stage, the diamine is added, and then the stirring, dispersing and mixing effects are good, so that the uniform and stable polymerization stock solution can be formed through gradual reaction. However, when the polymerization degree reaches a certain level, the viscosity of the polymerization liquid increases abruptly and the temperature is also high. When the dianhydride is added, on one hand, the dispersion and mixing are not uniform due to high viscosity of the stock solution, on the other hand, the polymerization reaction rate is accelerated due to high temperature, so that the phenomenon of sudden aggregation of partial stock solution is caused, some raw materials form gel blocks and settle even if the raw materials are not dispersed, and the final result is that the whole polymerization ratio is out of control, stable and uniform polymerization stock solution cannot be formed, and some raw materials even form blocks at the bottom of a reaction kettle.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the not enough to prior art provides a dispersion even, and the control reaction is even stable, avoids the local sudden gathering of polymerization, the raw materials dispersion mixing arrangement who is used for polyamic acid polymerization of caking.
The utility model aims to solve the technical problem that the utility model is realized by the following technical proposal, the utility model relates to a dispersion mixing device for polymerization of polyamide acid, which is characterized in that the dispersion mixing device comprises a reaction kettle, the upper part of the reaction kettle is provided with a charging hole, the side wall is provided with a circulating liquid inlet, the bottom is provided with a circulating liquid outlet, the circulating liquid inlet and the circulating liquid outlet of the reaction kettle are communicated by a circulating pipeline, and a conveying pump is arranged on the circulating pipeline; a pressure feed pipeline communicated with the circulating pipeline is arranged on the circulating pipeline close to the circulating liquid inlet of the reaction kettle, and a pressure feed pump and a flow meter are arranged on the pressure feed pipeline.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, above be used for among the dispersion mixing arrangement of polyamic acid polymerization: and a valve I is arranged on a circulating pipeline between the conveying pump and a circulating liquid outlet of the reaction kettle.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, above be used for among the dispersion mixing arrangement of polyamic acid polymerization: and a valve II is arranged on a pressure pipeline between the pressure feed pump and the circulating liquid inlet of the reaction kettle.
The utility model discloses the technical problem that solve can also further realize through following technical scheme, above be used for among the dispersion mixing arrangement of polyamic acid polymerization: the circulating liquid inlet is arranged on the side wall in the middle of the reaction kettle.
Compared with the prior art, the beneficial effects of the utility model are that:
the side wall of the reaction kettle is provided with a circulating liquid inlet and a circulating liquid outlet, the circulating liquid outlet and the circulating liquid inlet of the reaction kettle are communicated through a circulating pipeline, and the polymerization stock solution at the bottom in the reaction kettle is conveyed into the circulating liquid inlet of the reaction kettle through the circulating pipeline through a conveying pump, so that the circulation flow of the polymerization stock solution in the reaction kettle is realized, and the polymerization stock solution at the bottom in the reaction kettle can be prevented from settling and caking;
arranging a pressure feed pipeline on the circulating pipeline, so that dianhydride in the pressure feed pipeline is firstly dispersed and mixed with the polymerization stock solution in the circulating pipeline before being pressure-fed to the reaction kettle by a pressure feed pump, and then flows into the reaction kettle together; meanwhile, the dianhydride is pumped by the pressure-feed pump, so that the dianhydride can be uniformly and stably mixed into the stock solution, local sudden polymerization cannot be formed, the reaction temperature is too high, and the like, so that the whole polymerization stock solution has a good dispersion and mixing effect, and the final stock solution is uniform and stable.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. the system comprises a reaction kettle, 2 parts of a circulating liquid inlet, 3 parts of a circulating liquid outlet, 4 parts of a circulating pipeline, 5 parts of a pressure feed pipeline, 6 parts of a delivery pump, 7 parts of valves I and 8 parts of a pressure feed pump, 9 parts of a flow meter, 10 parts of valves II and 11 parts of a charging hole.
Detailed Description
The following further describes embodiments of the present invention in order to facilitate further understanding of the present invention by those skilled in the art, and does not constitute a limitation to the right thereof.
[ example 1 ]
Referring to fig. 1, a dispersing and mixing device for polymerization of polyamic acid comprises a reaction kettle 1, wherein a feed inlet 11 is arranged at the upper part of the reaction kettle 1, a circulating liquid inlet 2 is arranged on the side wall of the reaction kettle 1, a circulating liquid outlet 3 is arranged at the bottom of the reaction kettle 1, the circulating liquid inlet 2 and the circulating liquid outlet 3 of the reaction kettle 1 are communicated through a circulating pipeline 4, and a conveying pump 6 is arranged on the circulating pipeline 4; a pressure feed line 5 communicating with the circulation line 4 is provided on the circulation line 4 near the circulation liquid inlet 2 of the reaction vessel 1, and a pressure feed pump 8 and a flow meter 9 are provided on the pressure feed line 5.
A valve I7 is arranged on a circulating pipeline 4 between the delivery pump 6 and the circulating liquid outlet 3 of the reaction kettle 1. The polymerization stock solution at the bottom in the reaction kettle 1 is conveyed to the circulating liquid inlet 2 of the reaction kettle 1 through the circulating pipeline 4 by the conveying pump 6, the circulating flow of the polymerization stock solution in the reaction kettle 1 is realized, the circulating flow speed of the polymerization stock solution in the circulating pipeline 4 can be effectively controlled by the matching valve I7, and the bottom-sinking agglomeration of the polymerization stock solution at the bottom in the reaction kettle 1 can be prevented.
A valve II 10 is arranged on the pressure-feed pipeline 5 between the pressure-feed pump 8 and the circulating liquid inlet 2 of the reaction kettle 1. Dianhydride is pumped by the pressure-feed pump 8 and is matched with the valve II 10, so that the dianhydride can be effectively controlled to be uniformly and stably mixed into the stock solution, local sudden polymerization cannot be formed, the reaction temperature is too high, and the like, so that the whole polymerization stock solution has a good dispersion and mixing effect, and finally the stock solution is uniform and stable.
The circulating liquid inlet 2 is arranged on the side wall of the middle part of the reaction kettle 1.
Claims (4)
1. A dispersion mixing device for polymerization of polyamic acid, comprising: the device comprises a reaction kettle, wherein a feed inlet is arranged at the upper part of the reaction kettle, a circulating liquid inlet is arranged on the side wall of the reaction kettle, a circulating liquid outlet is arranged at the bottom of the reaction kettle, the circulating liquid inlet and the circulating liquid outlet of the reaction kettle are communicated through a circulating pipeline, and a conveying pump is arranged on the circulating pipeline; a pressure feed pipeline communicated with the circulating pipeline is arranged on the circulating pipeline close to the circulating liquid inlet of the reaction kettle, and a pressure feed pump and a flow meter are arranged on the pressure feed pipeline.
2. The dispersion mixing apparatus for polymerization of polyamic acid according to claim 1, characterized in that: and a valve I is arranged on a circulating pipeline between the conveying pump and a circulating liquid outlet of the reaction kettle.
3. The dispersion mixing apparatus for polymerization of polyamic acid according to claim 1, characterized in that: and a valve II is arranged on a pressure pipeline between the pressure feed pump and the circulating liquid inlet of the reaction kettle.
4. The dispersion mixing apparatus for polymerization of polyamic acid according to claim 1, characterized in that: the circulating liquid inlet is arranged on the side wall in the middle of the reaction kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020603321.1U CN212284002U (en) | 2020-04-21 | 2020-04-21 | Dispersing and mixing device for polymerizing polyamic acid |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020603321.1U CN212284002U (en) | 2020-04-21 | 2020-04-21 | Dispersing and mixing device for polymerizing polyamic acid |
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| CN212284002U true CN212284002U (en) | 2021-01-05 |
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| CN202020603321.1U Active CN212284002U (en) | 2020-04-21 | 2020-04-21 | Dispersing and mixing device for polymerizing polyamic acid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113578229A (en) * | 2021-06-29 | 2021-11-02 | 浙江中科玖源新材料有限公司 | Polymerization reaction system capable of preventing violent heat release |
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2020
- 2020-04-21 CN CN202020603321.1U patent/CN212284002U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113578229A (en) * | 2021-06-29 | 2021-11-02 | 浙江中科玖源新材料有限公司 | Polymerization reaction system capable of preventing violent heat release |
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