CN201517080U - Final polymerization kettle for PTT continuous polymerization device - Google Patents
Final polymerization kettle for PTT continuous polymerization device Download PDFInfo
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- CN201517080U CN201517080U CN2009201893770U CN200920189377U CN201517080U CN 201517080 U CN201517080 U CN 201517080U CN 2009201893770 U CN2009201893770 U CN 2009201893770U CN 200920189377 U CN200920189377 U CN 200920189377U CN 201517080 U CN201517080 U CN 201517080U
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- kettle
- agitator
- polymerization
- ptt
- cage
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- Polyesters Or Polycarbonates (AREA)
Abstract
The utility model discloses a final polymerization kettle used for a PTT continuous polymerization device, which comprises a kettle body and a stirrer, wherein the kettle body adopts a horizontal reaction vessel, and the stirrer adopts a squirrel cage type stirrer. The PTT polyester with viscosity meeting the operating requirements can be obtained by adopting the final polymerization kettle combining with the four-reactor process, and the follow-up solid-state polymerization working procedure is not required, so that not only does the working procedure be simplified and the cost be reduced, but also the adverse effect of solid-state polymerization to the quality of the PTT polyester is avoided.
Description
Technical field
The utility model relates to a kind of PTT continuous polymerization unit, particularly relates to terminal polymerization kettle wherein.
Background technology
Poly(Trimethylene Terephthalate) (PTT) is a kind of new polyester material that has development prospect of the mid-90 in 20th century commercial exploitation success.It and PET, PBT belong to the novel organic polymer aromatic polyester product of same series of polymers.PTT succeeds in developing, and has further enriched fiber product series.
In the prior art, the production of PTT mainly contains two kinds of batchwise polymerization method and continuous polymerizations.In present PTT successive polymerization production equipment, in order to guarantee that the PTT polyester has good molecular weight distribution, general terminal polymerization kettle adopts two agitator disk ring type agitators, and the squirrel-cage agitator is not owing to there is grid, the material short circuit of connecting easily, cause product molecular weight distribution wide, downgrade and not being used.Yet, limiting viscosity for the PTT polyester product that reaches regulation, the length of the terminal polymerization kettle of existing continuous polymerization unit must be than long 1.5～2.5 times of the length of the terminal polymerization kettle of common PET polyester device, not only facility investment is bigger, and because longer still design, strengthened the length that stirs, increased the energy consumption of producing, be unfavorable for reducing cost.
Summary of the invention
Technical problem to be solved in the utility model provides a kind of terminal polymerization kettle of PTT continuous polymerization unit to cut down the consumption of energy and cost.
For solving above technical problem, the utility model is taked following technical scheme:
A kind of terminal polymerization kettle of PTT continuous polymerization unit comprises kettle, agitator, and described agitator comprises at least one spiral type agitator and at least one squirrel-cage agitator.
As further embodiment of the present utility model: a side of the bottom of described kettle is provided with material inlet, opposite side in the bottom of kettle is provided with material outlet, the spiral type agitator is set in the kettle of material inlet side, the squirrel-cage agitator is set in the kettle of material outlet side.
Described spiral type agitator, squirrel-cage the agitator length ratio of the kettle at place separately are 1: 0.8～1.2, are preferably 1: 1, promptly in the first half length of whole kettle the spiral type reactor are set, and in half length of back the squirrel-cage agitator are set.
Because the enforcement of above technical scheme, the utility model compared with prior art has following advantage:
The utility model terminal polymerization kettle takes disk ring/cage to mix whipped form, and melt at first carries out polyreaction through the spiral type agitator, can guarantee that material has molecular weight distribution preferably, thereby reach certain kinematic viscosity.Afterwards, enter the tackify district, take squirrel-cage to stir, utilize cage to stir high-efficiency characteristics, further increase evaporation area, the carrying out of accelerating polyreaction, so, can effectively shorten on the one hand the length (can with the length reduction of PTT successive polymerization reactor 1.8～2.5 times) of terminal polymerization kettle, thereby reduce the difficulty of reactor design difficulty, application maintenance and reduce the energy consumption of producing to common PET polyester terminal polymerization kettle length; On the other hand, mix the whipped form design, can guarantee that the PTT section has good molecular weight distribution, guarantees quality product owing to use.
Description of drawings
The utility model is described in more detail below in conjunction with accompanying drawing and concrete embodiment.
Fig. 1 is the terminal polymerization kettle with PTT continuous polymerization unit of the present utility model;
Wherein: 1, kettle; 2, agitator; 10, material inlet; 11, material outlet; 20, spiral type agitator; 21, squirrel-cage agitator.
Embodiment
As shown in Figure 1, a kind of terminal polymerization kettle of PTT continuous polymerization unit, comprise kettle 1, agitator 2, wherein, kettle 1 is the bedroom reactor, bottom in the two opposite sides of kettle 1 is respectively arranged with material inlet 10 and material outlet 11, wherein in the kettle zone of material inlet 10 sides, spiral type agitator 20 is set, and squirrel-cage agitator 21 is set in the kettle zone of material outlet 11 sides, in this example, spiral type agitator 20, the length of squirrel-cage agitator 21 shared kettlies is identical, it will be appreciated by those skilled in the art that, the length of the kettle that spiral type agitator 20 and squirrel-cage agitator 21 are shared also can be different, specifically can select according to the real reaction situation.
Spiral type agitator membrane efficient in to the high-viscosity melt polymerization process is starkly lower than the squirrel-cage reactor, therefore, reaches same limiting viscosity, and the spiral type agitator needs the more number of sheets that stirs, and reactor must extend.This design and maintenance to reactor has increased difficulty.But spiral type stirs because grid is arranged between ring plate, can guarantee that melt has the sufficient residence time at each grid, and molecular weight distribution is narrower, and is therefore favourable to quality product.The cage stirred reactor owing to there is not grid, is easy to generate the series connection short circuit, and therefore the section molecular weight distribution of making is wide, and quality is starkly lower than the spiral type stirred reactor.For the production of PTT polyester, owing to need higher viscosity, use the cage agitator merely, violent reaction process makes product performance obviously descend.The utility model adopts disk ring/cage to mix whipped form, and melt at first carries out polyreaction through the spiral type agitator, can guarantee that material has molecular weight distribution preferably.Thereby reach certain kinematic viscosity.After the process spiral type whipped form polymerization of first half, enter the tackify district, terminal polymerization kettle latter half whipped form adopts squirrel-cage to stir, squirrel-cage stirs can further increase evaporation area, accelerate the carrying out of polyreaction, therefore, here, the polymerization degree will further be brought up to the viscosity of regulation.By using disk ring/cage to mix the design of whipped form terminal polymerization kettle, can effectively shorten the length of terminal polymerization kettle on the one hand, thereby reduce the difficulty of reactor design difficulty, application maintenance and cut down the consumption of energy.The use of cage agitator can be with to common PET polyester terminal polymerization kettle length 1.8～2.5 times of the length reduction of PTT successive polymerization reactor.On the other hand, mix the whipped form design, can guarantee that the PTT section has good molecular weight distribution, has improved quality product owing to use.
More than the utility model has been done detailed description, but the utility model is not limited to the above embodiments.All equivalences of doing according to spirit of the present utility model change or modify, and all should be encompassed in the protection domain of the present utility model.
Claims (4)
1. the terminal polymerization kettle of a PTT continuous polymerization unit comprises kettle (1), agitator (2), it is characterized in that: described agitator (2) comprises at least one spiral type agitator (20) and at least one squirrel-cage agitator (21).
2. the terminal polymerization kettle of PTT continuous polymerization unit according to claim 1, it is characterized in that: a side of the bottom of described kettle (1) is provided with material inlet (10), opposite side in the bottom of described kettle (1) is provided with material outlet (11), in the kettle (1) of described material inlet (10) side, spiral type agitator (20) is set, in the kettle (1) of described material outlet (11) side, squirrel-cage agitator (21) is set.
3. the terminal polymerization kettle of PTT continuous polymerization unit according to claim 1 and 2 is characterized in that: described spiral type agitator (20), described squirrel-cage agitator (21) length ratio of the kettle at place (1) separately are 1: 0.8～1.2.
4. the terminal polymerization kettle of PTT continuous polymerization unit according to claim 3 is characterized in that: described spiral type agitator (20), described squirrel-cage agitator (21) length ratio of the kettle at place (1) separately are 1: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201893770U CN201517080U (en) | 2009-09-29 | 2009-09-29 | Final polymerization kettle for PTT continuous polymerization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201893770U CN201517080U (en) | 2009-09-29 | 2009-09-29 | Final polymerization kettle for PTT continuous polymerization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201517080U true CN201517080U (en) | 2010-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201893770U Expired - Lifetime CN201517080U (en) | 2009-09-29 | 2009-09-29 | Final polymerization kettle for PTT continuous polymerization device |
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| CN (1) | CN201517080U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111560116A (en) * | 2020-05-26 | 2020-08-21 | 浙江恒澜科技有限公司 | Production method for continuously producing high-viscosity polymer |
| CN111701553A (en) * | 2020-05-19 | 2020-09-25 | 浙江恒澜科技有限公司 | Polymerization reactor suitable for high-viscosity PTT production |
-
2009
- 2009-09-29 CN CN2009201893770U patent/CN201517080U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111701553A (en) * | 2020-05-19 | 2020-09-25 | 浙江恒澜科技有限公司 | Polymerization reactor suitable for high-viscosity PTT production |
| CN111560116A (en) * | 2020-05-26 | 2020-08-21 | 浙江恒澜科技有限公司 | Production method for continuously producing high-viscosity polymer |
| CN111560116B (en) * | 2020-05-26 | 2022-05-20 | 浙江恒澜科技有限公司 | Method for continuously producing high-viscosity polymer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100630 |
|
| CX01 | Expiry of patent term |