CN216856714U - Esterification reaction device for producing PBAT and PBT - Google Patents
Esterification reaction device for producing PBAT and PBT Download PDFInfo
- Publication number
- CN216856714U CN216856714U CN202220259853.7U CN202220259853U CN216856714U CN 216856714 U CN216856714 U CN 216856714U CN 202220259853 U CN202220259853 U CN 202220259853U CN 216856714 U CN216856714 U CN 216856714U
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- CN
- China
- Prior art keywords
- bdo
- esterification
- kettle body
- pbat
- esterification reaction
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- 238000005886 esterification reaction Methods 0.000 title claims abstract description 65
- 229920001896 polybutyrate Polymers 0.000 title claims abstract description 19
- 230000032050 esterification Effects 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000011010 flushing procedure Methods 0.000 claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 238000010438 heat treatment Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 5
- 239000007921 spray Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 9
- 239000012535 impurity Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 5
- 238000003756 stirring Methods 0.000 description 5
- 238000005406 washing Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 4
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052719 titanium Inorganic materials 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- ZIBGPFATKBEMQZ-UHFFFAOYSA-N triethylene glycol Chemical compound OCCOCCOCCO ZIBGPFATKBEMQZ-UHFFFAOYSA-N 0.000 description 2
- AXPZIVKEZRHGAS-UHFFFAOYSA-N 3-benzyl-5-[(2-nitrophenoxy)methyl]oxolan-2-one Chemical compound [O-][N+](=O)C1=CC=CC=C1OCC1OC(=O)C(CC=2C=CC=CC=2)C1 AXPZIVKEZRHGAS-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000011437 continuous method Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004408 titanium dioxide Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model provides an esterification reaction device for producing PBAT and PBT, which comprises an esterification kettle body with a hollow inner cavity, an esterified substance conveying pipe, a BDO flushing pipe and a BDO collecting loop, wherein the esterification kettle body is provided with a discharge valve and connected with the hollow inner cavity, the esterified substance conveying pipe is communicated with the hollow inner cavity, the BDO flushing pipe is connected with the hollow inner cavity of the esterification kettle body, the esterification kettle body is provided with a high-pressure water inlet pipe, the high-pressure water inlet pipe is communicated with a water spraying strip arranged on the hollow inner cavity, the bottom of the water spraying strip is provided with a through hole, and the bottom of the inner cavity of the esterification kettle body is provided with a water flushing groove.
Description
Technical Field
The utility model belongs to the technical field of polymerization devices, and particularly relates to an esterification reaction device for producing PBAT and PBT.
Background
The direct esterification, continuous polycondensation process of japan chiffon currently in operation is used to produce PBAT or PBT, both processes being very similar. In PBT, fiber-grade polyethylene terephthalate chips and melts are produced from purified terephthalic acid and ethylene glycol. When the automobile is stopped for maintenance, triethylene glycol is used as a first cleaning solution, and ethylene glycol is used as a second cleaning solution. The cleaning method has the advantages that the operation temperature is 270 ℃, the temperature is high, the safety is poor, the heat load is high, the cleaning time is long, the driving time is prolonged, the triethylene glycol and the ethylene glycol cleaning solution are respectively recovered twice, the recovery workload is large, and the cost is high.
And the PTA continuous method for producing PBT always uses titanium catalyst, and the hydrolysis phenomenon of the titanium catalyst causes the fouling of PBT production equipment, especially esterification kettles, to be serious. Titanium dioxide particles generated by the reaction are easily adsorbed on the inner wall of the reaction kettle, and then esterified substances are adhered to form scales. Has influence on the next process reaction, so that a clean inner cavity is the key for carrying out the esterification reaction of the new mixture.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems in the prior art, and provides an esterification reaction device for producing PBAT and PBT, wherein coking and carbide on the inner wall of an esterification kettle are loosened and washed away, the problem that the subsequent process reaction is influenced due to unclean adhesion and washing of the esterification product accumulated in the kettle is solved, and a new recyclable BDO washing device is arranged on a discharge valve pipeline and can be used for dredging.
In order to achieve the purpose, the utility model provides an esterification reaction device for producing PBAT and PBT, which comprises an esterification kettle body with a hollow inner cavity, an esterification product delivery pipe, a BDO flushing pipe and a BDO collecting loop, wherein the esterification kettle body is provided with a discharge valve and connected with the hollow inner cavity, the esterification product delivery pipe is communicated with the hollow inner cavity, the BDO flushing pipe is connected with the hollow inner cavity of the esterification kettle body, the esterification kettle body is provided with a high-pressure water inlet pipe, the high-pressure water inlet pipe is communicated with a water spraying strip arranged on the hollow inner cavity, the bottom of the water spraying strip is provided with a through hole, and the bottom of the inner cavity of the esterification kettle body is provided with a water flushing groove.
Preferably, the discharge valve is connected with a BDO collecting loop.
Preferably, the BDO collecting loop comprises a filter box sleeved on the discharge valve, the bottom of the filter box is provided with a funnel with a valve, an inclined filter screen is arranged above the funnel, the side surface of the filter box is also provided with a dust removing fan driven by a motor, and the side surface of the filter box is provided with an opening;
the funnel passes through the pipe connection BDO holding vessel feed inlet, the BDO holding vessel
The discharge port is connected back to the BDO pump pipeline through a pipeline.
Preferably, the flushing tank is connected with a BDO flushing pipeline and a discharge valve.
Preferably, the bottom of the hollow inner cavity is provided with a plurality of rotating blades in an arrayed manner.
Preferably, the side wall of the esterification kettle body is provided with an opening, the opening is provided with a stirring shaft extending into the hollow inner cavity, and the stirring shaft is driven and connected by a motor.
Preferably, two groups of front and rear extension ends are arranged on two sides of the outer wall of the esterification kettle body, the front extension ends are rotatably connected with the retainer, and the rear extension ends are connected with the telescopic rod.
Preferably, the bottom of the esterification kettle body is provided with a heating assembly.
The utility model has the beneficial effects that: according to the utility model, BDO raw materials are recycled through the BDO collecting loop while being washed through BDO, and then high-pressure water of the high-pressure water inlet pipeline at the upper part of the esterification kettle body is used for matching with the stirring shaft to effectively wash attached magazines in the kettle body, and impurities are effectively removed from the esterification kettle body through the water flowing groove at the bottom towards the discharge valve.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a cross-sectional view of an esterification apparatus for the production of PBAT and PBT according to the utility model;
FIG. 2 is a partial enlarged view A of an esterification reaction apparatus for producing PBAT and PBT according to the present invention;
FIG. 3 is a cross-sectional view of an end face of an esterification reaction apparatus for producing PBAT and PBT according to the present invention;
FIG. 4 is an external view of an esterification apparatus for the production of PBAT and PBT according to the utility model;
in the figure: the device comprises a 1-esterification kettle body, a 2-esterification product conveying pipe, a 3-BDO flushing pipeline, a 4-discharge valve, a 5-hollow inner cavity, a 6-high-pressure water inlet pipeline, a 7-water spray bar, 8-through holes, 9-water flushing tanks, 10-rotating blades, 11-stirring shafts, 12-front extension ends, 13-retainers, 14-rear extension ends, 15-telescopic rods, 16-heating components, 17-BDO collecting loops, 18-filter boxes, 19-filter screens, 20-dedusting fans, 21-openings, 22-funnels, 23-BDO storage tanks and 24-BDO pumps.
Detailed Description
Referring to fig. 1, 2, 3 and 4, the present invention comprises an esterification kettle body 1 with a hollow inner cavity 5, an esterification product delivery pipe 2, a BDO flushing pipe 3 and a BDO collecting loop 17, the esterification kettle body 1 is provided with a discharge valve 4 and is connected with a hollow inner cavity 5, the esterification material conveying pipe 2 is communicated with the hollow inner cavity 5, the BDO flushing pipeline 3 is connected with a hollow inner cavity 5 of the esterification kettle body 1, a high-pressure water inlet pipeline 6 is arranged on the esterification kettle body 1, the high-pressure water inlet pipeline 6 is communicated with a water spray bar 7 arranged on the hollow inner cavity 5, the bottom of the water spray bar 7 is provided with a through hole 8, the bottom of the inner cavity of the esterification kettle body 1 is provided with a water flushing groove 9, compared with the prior art, through BDO hot state washing before the working procedure and twice washing of high-pressure water, the interior of the esterification kettle body 1 is cleaner, so that the hollow inner cavity 5 between subsequent working procedures and after reaction is more effective and time-saving.
Specifically, bleeder valve 4 connects BDO and collects return circuit 17, carries out effectual recovery cyclic utilization to the BDO raw materials, practices thrift the cost more.
Specifically, the BDO collecting loop comprises a filter box sleeved on a discharge valve, the bottom of the filter box is provided with a funnel with a valve, an inclined filter screen is arranged above the funnel, the side surface of the filter box is also provided with a dust removing fan driven by a motor, and the side surface of the filter box is provided with an opening; liquid after washing is filtered through the filter box, if the BDO raw materials, the valve of funnel is opened and is collected through the pipeline to effectively get rid of waste materials such as impurity, dust through filter screen and the dust removal fan of slope.
The funnel passes through the pipe connection BDO holding vessel feed inlet, BDO holding vessel discharge gate passes through the pipeline and retrieves BDO pump pipeline department, recycles the BDO raw materials through the recovery pipeline and reacts or washs and practiced thrift the cost greatly.
Specifically, the flushing tank 9 is connected with the BDO flushing pipeline 3 and the discharge valve 4, water at the opening of the BDO flushing pipeline 3 flushes impurities precipitated in the bottom flushing tank 9 to play a role in guiding, and the impurities are flushed out of the esterification kettle body 1 through the discharge valve 4.
Specifically, 5 bottom arrangements in cavity inner chamber are equipped with a plurality of rotating vane 10, rotating vane 10 can drive its rotation through the motor in bottom multirow multiseriate setting, stirs impurity and water on the cavity inner chamber 5 and the esterification reaction kettle body 1 wall washed, guarantees that the mobility of mixed liquid prevents to adhere behind the sediment that the blocking can't get rid of outside bleeder valve 4.
It is specific, be equipped with the opening on the 1 lateral wall of the esterification reaction kettle body, the opening is equipped with the (mixing) shaft 11 that stretches into cavity inner chamber 5, the (mixing) shaft 11 is connected by motor drive, high-pressure water inlet pipe 6 gets into the internal high pressure water of esterification reaction kettle and not only washes the adhesion thing on the (mixing) shaft 11 to through the rotation of (mixing) shaft 11, sprinkle the high pressure water on the wall of whole cavity inner chamber 5, also erode the esterified thing on it, make various impurity in the bath 9 of falling to cavity inner chamber 5 bottom in the same direction as.
Specifically, 1 outer wall both sides of the esterification reactor body are equipped with two sets of front and back ends that stretch out, 12 swivelling joint holders 13 of end stretch out in the front, stretch out end 14 behind and connect telescopic link 15, make whole esterification reactor body 1 become an angle that makes bleeder valve 4 slope down through the rising of telescopic link 15, then make impurity and water in the wash tank 9 through self gravity more smooth and easy get rid of the esterification reactor body 1 outside through bleeder valve 4.
Specifically, the bottom of the esterification kettle body 1 is provided with the heating component 16, and impurities which are bonded or are particularly difficult to remove can be heated by the heating component 16 to be dissolved, so that the impurities are easier to dissolve in water and then are removed.
Claims (8)
1. The utility model provides an esterification reaction device of PBAT and PBT production, washes pipeline (3) and BDO collection return circuit (17) including the esterification kettle body (1), esterified material conveyer pipe (2) and BDO that have cavity inner chamber (5), esterification kettle body (1) is equipped with bleeder valve (4) and connects cavity inner chamber (5), esterified material conveyer pipe (2) and cavity inner chamber (5) switch-on, BDO washes pipeline (3) and connects cavity inner chamber (5) of esterification kettle body (1), be equipped with high-pressure inlet channel (6) on esterification kettle body (1), high-pressure inlet channel (6) intercommunication sets up water spray strip (7) on cavity inner chamber (5), open water spray strip (7) bottom has through-hole (8), open water wash basin (9) bottom esterification kettle body (1) inner chamber.
2. The esterification reaction apparatus for the production of PBAT and PBT according to claim 1, wherein: the discharge valve (4) is connected with a BDO collecting loop (17).
3. The esterification reaction device for the production of PBAT and PBT according to claim 2, characterized in that: the BDO collecting loop (17) comprises a filter box (18) sleeved on the discharge valve (4), the bottom of the filter box (18) is provided with a funnel (22) with a valve, an inclined filter screen (19) is arranged above the funnel, the side surface of the filter box (18) is also provided with a dust removing fan (20) driven by a motor, and the side surface of the filter box (18) is provided with an opening (21);
the hopper (22) is connected with a feed inlet of the BDO storage tank (23) through a pipeline, and a discharge outlet of the BDO storage tank (23) is connected to a pipeline of the BDO pump (24) through a pipeline in a returning mode.
4. The esterification reaction apparatus for the production of PBAT and PBT according to claim 1, wherein: the flushing tank (9) is connected with the BDO flushing pipeline (3) and the discharge valve (4).
5. The esterification reaction apparatus for the production of PBAT and PBT according to claim 1, wherein: the bottom of the hollow inner cavity (5) is provided with a plurality of rotating blades (10) in an arrayed manner.
6. The esterification reaction apparatus for the production of PBAT and PBT according to claim 1, wherein: be equipped with the opening on the cauldron body (1) lateral wall of esterifying, the opening is equipped with (mixing) shaft (11) that stretch into cavity inner chamber (5), (mixing) shaft (11) are connected by motor drive.
7. The esterification reaction apparatus for the production of PBAT and PBT according to claim 1, wherein: two groups of front and back extending ends are arranged on two sides of the outer wall of the esterification kettle body (1), the front extending end (12) is rotatably connected with the retainer (13), and the rear extending end (14) is connected with the telescopic rod (15).
8. The esterification reaction device for the production of PBAT and PBT according to claim 1, wherein: the bottom of the esterification kettle body (1) is provided with a heating component (16), and the heating component is a heating pipe arranged in a spread mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220259853.7U CN216856714U (en) | 2022-02-07 | 2022-02-07 | Esterification reaction device for producing PBAT and PBT |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220259853.7U CN216856714U (en) | 2022-02-07 | 2022-02-07 | Esterification reaction device for producing PBAT and PBT |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216856714U true CN216856714U (en) | 2022-07-01 |
Family
ID=82154933
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220259853.7U Active CN216856714U (en) | 2022-02-07 | 2022-02-07 | Esterification reaction device for producing PBAT and PBT |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216856714U (en) |
-
2022
- 2022-02-07 CN CN202220259853.7U patent/CN216856714U/en active Active
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