CN108404846A - Novel precondensation kettle - Google Patents
Novel precondensation kettle Download PDFInfo
- Publication number
- CN108404846A CN108404846A CN201810521993.5A CN201810521993A CN108404846A CN 108404846 A CN108404846 A CN 108404846A CN 201810521993 A CN201810521993 A CN 201810521993A CN 108404846 A CN108404846 A CN 108404846A
- Authority
- CN
- China
- Prior art keywords
- kettle
- tower tray
- precondensation
- novel
- reducer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 13
- 238000007789 sealing Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 abstract description 20
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000010924 continuous production Methods 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 21
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 19
- 239000000463 material Substances 0.000 description 18
- 150000007942 carboxylates Chemical class 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000032050 esterification Effects 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 238000002309 gasification Methods 0.000 description 2
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 description 2
- 238000010907 mechanical stirring Methods 0.000 description 2
- 238000006068 polycondensation reaction Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 150000003384 small molecules Chemical class 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 150000002334 glycols Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/24—Stationary reactors without moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J10/00—Chemical processes in general for reacting liquid with gaseous media other than in the presence of solid particles, or apparatus specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention belongs to chemical equipments, are related to a kind of novel precondensation kettle, using vertical structure, include that lower kettle supports successively from bottom to top, lower kettle, reducer, chuck bringing-up section and kettle cover, it is characterised in that the lower kettle, reducer and kettle cover are equipped with half coil pipe or honeycomb duct；If the built-in internals being made of dried layer annular column disk and bubble-cap of the lower kettle.The present invention provides ideal reaction environment for prepolymerization reaction, and compared with traditional tank reactor, intermittent reaction before the present invention changes can reduce production cost with continuous production, improve production efficiency, energy conservation and environmental protection, the more market competitiveness.
Description
Technical field
The invention belongs to chemical equipment technologies, are applied to the production of polyester fields such as PET, PBT, PTT, and in particular to Yi Zhongxin
Type precondensation kettle.
Background technology
Precondensation is the significant process of polyester synthesis, and polyester precondensation is that a mistake of Esterification Stage to the poly- section of final minification is tided over
Journey, task are will to be esterified the carboxylate that section is sent to be finally completed esterification and carry out polycondensation reaction, make the oligomer of generation
The degree of polymerization reaches certain index, to ensure that final polycondensation reactor can produce qualified product.
Traditional Prepolycondensating reactor mostly uses stirred tank, to reach and piston flow reactor（Pass through reactor
Material with identical speed flow forward, does not have material back-mixing in the axial direction in the same direction, and the material in any infinitesimal is reacting
Residence time in device is identical）The identical extent of reaction, reaction condition are harsher.In order to improve material flow pattern, often will
Autoclave stirred reactor is together in series, and concatenated kettle is more, and material operates, the trouble of control etc. closer to laminar flow
It is corresponding to increase.
Invention content
The purpose of the present invention is in view of the above-mentioned problems, and a kind of novel precondensation kettle of offer.
The main technical schemes of the present invention：Novel precondensation kettle includes lower kettle successively from bottom to top using vertical structure
Support, lower kettle, reducer, chuck bringing-up section and kettle cover, it is characterised in that the lower kettle, reducer and kettle cover are equipped with half
Coil pipe or honeycomb duct；If the built-in internals being made of dried layer annular column disk and bubble-cap of the lower kettle.
Usually, the internals include polylith annular tower tray and one piece of bubble-cap, annular tower tray and polylith of the polylith with inner cylinder
The annular tower tray of cover plate is arranged alternately, and bubble-cap is placed in the top of annular tower tray；The annular tower tray with inner cylinder is equipped with
Downflow weir.
The gas-phase space of the annular tower tray of the polylith cover plate is gradually reduced from bottom to top.
The lower kettle lower end is equipped with feed inlet, and reducer is equipped with discharge port, and kettle cover is equipped with outlet bend pipe.
The novel precondensation kettle autoclave body flange welds sealing structure using lip.
If the present invention in lower kettle by being arranged the internals being made of dried layer annular column disk and bubble-cap, polylith is with inner cylinder
The annular tower tray of annular tower tray and polylith cover plate is arranged alternately, and can a kettle be divided into multiple reative cells, is equivalent to increase
Concatenated kettle number, makes precondensation kettle lower kettle part closer to tower structure, material is also closer to laminar flow.Bubble-cap is placed in ring
The top of shape tower tray can effectively prevent glycol steam to the direct impact at the top of reaction kettle.
The utility model precondensation kettle shell flange welds sealing structure using lip, not only ensure that equipment sealed demand, but also reduce
Flange thickness.
Autoclave body top of the present invention is enlarged, and no mechanical stirring device, carboxylate is by the entrance of autoclave body lower part feed inlet.Object
After material enters in kettle, due to pressure reduction, ethylene glycol gasification, logistics forms gas-liquid two-phase cocurrent and flows up, and gas-liquid is fully mixed
It closes, into last layer tower tray, gas-liquid separation, gas enters the gas-phase space on tower tray, and liquid, which is fallen on, forms liquid layer on tower tray,
Downflow weir gas velocity increases, and gas carrying liqs are flowed to downflow weir, and the small molecule for reacting generation is escaped from liquid layer while also to liquid
Layer is stirred mixing up and down.Therefore the reative cell of an approximate laminar flow, at this time preshrunk are formd between entire internals tower tray
Poly- kettle can regard the gas-liquid reactor of a multistage cocurrent from bottom to top as, than the reaction, mixing, gas that reasonably realize material
The functions such as liquid separation, a good reacting environment is provided for prepolymerization reaction.
The novel precondensation kettle of the present invention provides ideal reaction environment for prepolymerization reaction, with traditional still reaction
Device compares, and intermittent reaction before the present invention changes can reduce production cost with continuous production, improves production effect
Rate, energy conservation and environmental protection, the more market competitiveness.
Description of the drawings
Fig. 1 is the structural schematic diagram of the novel precondensation kettle of the embodiment of the present invention.
Fig. 2 is the partial structural diagram of annular tower tray in embodiment internal diameter.
Fig. 3 is the structural schematic diagram of bubble-cap in embodiment internals.
In figure, 1- lower kettles support, 2- lower kettles, 3- internals, 4- reducers, 5- chuck bringing-up sections, 6- kettle covers, and 7- is with cover
The tower tray of plate, tower trays of the 8- with inner cylinder, 9- downflow weirs, 10- bubble-caps.
Specific implementation mode
Present invention will now be described in detail with reference to the examples and drawings.
Embodiment
The novel precondensation kettle structure of the present embodiment is shown in Fig. 1, includes lower kettle successively from bottom to top using vertical structure
Support 1, lower kettle 2, internals 3, reducer 4, chuck bringing-up section 5 and kettle cover 6, are mainly characterized by lower kettle 2, reducer 4
And kettle cover 6 is equipped with half coil pipe or honeycomb duct；If the built-in internals 3 being made of dried layer annular column disk and bubble-cap 10 of lower kettle 2.
In embodiment, internals 3 include polylith annular tower tray and one piece of bubble-cap 10, and refer to the attached drawing 1 and 2, polylith is with inner cylinder
Annular tower tray 8 and the annular tower tray 7 of polylith cover plate are arranged alternately, and bubble-cap 10 is placed in the top of annular tower tray, with inner cylinder
Annular tower tray 8 is equipped with downflow weir 9.
In order to ensure material preferably mobility, reaction is set to continue to carry out and preferably normally discharge, embodiment is more
The cover plate central inner diameter of steel flue and height of the annular tower tray 7 of block cover plate are gradually reduced from bottom to top, to make the ring of cover plate
7 gas-phase space of shape tower tray is gradually reduced from bottom to top.In this way with the progress of reaction, ethylene glycol is constantly escaped from material, object
Material viscosity continues to increase, by reducing gas-phase space from bottom to top, to ensure the mobility of material.Bubble-cap 10 is mounted on all towers
Above disk, glycol steam can be effectively prevent to the direct impact at the top of reaction kettle.
In embodiment, 1 lower end of lower kettle is equipped with feed inlet, and reducer 4 is equipped with discharge port, and kettle cover 6 is equipped with outlet bend pipe.
The novel precondensation kettle autoclave body flange of the present embodiment welds sealing structure using lip, not only ensure that equipment sealed demand, but also
Reduce flange thickness.
In embodiment, the main medium in the chuck on half coil pipe, chuck bringing-up section on lower kettle, reducer and kettle cover
For conduction oil, by with inner tube wall contact heat-exchanging, ensure the operating temperature of inner cylinder medium, improve reaction efficiency.Autoclave body top is
Enlarged, no mechanical stirring device, carboxylate are entered by autoclave body lower part feed inlet.After material enters in kettle, due to pressure drop
Low, ethylene glycol gasification, logistics forms gas-liquid two-phase cocurrent and flows up, and gas-liquid is sufficiently mixed, into last layer tower tray, gas-liquid point
From gas enters the gas-phase space on tower tray, and liquid, which is fallen on, forms liquid layer on tower tray, increases in 9 gas velocity of downflow weir, gas band liquid
Body is flowed to downflow weir 9, reacts the small molecule of generation from effusion in liquid layer while also to being stirred mixing above and below liquid layer.Therefore
The reative cell of an approximate laminar flow is formd between entire internals tower tray, precondensation kettle can regard a multistage cocurrent as certainly at this time
It is lower and on gas-liquid reactor than functions such as the reactions, mixing, gas-liquid separation that reasonably realize material be that precondensation is anti-
A good reacting environment should be provided.
In Prepolycondensating reactor, removing amount of the ethylene glycol on every piece of tower tray depends on the vapor-liquid equilibrium relationship on plate, and
Temperature, pressure can all have an impact vapor liquid equilibrium, and since reaction heat is smaller, reactor temperature can pass through half coil pipe and folder
Heat conduction oil temperature in set is adjusted；Operating pressure is decided by that tower top pressure and tower tray pressure drop, free glycols amount depend on tower tray
The height of the ethylene glycol amount injected to material, the degree of polymerization depends on residence time of the material on every piece of tower tray.
Embodiment is such to running：Material enters from the feed inlet in lower kettle support in kettle, on internals tower tray
Prepolymerization reaction is carried out, is passed through conduction oil in chuck and half coil pipe to ensure material reaction required temperature, reaction product is from reducing
The discharge port discharge of section, precondensation steam are discharged from the outlet bend pipe on kettle cover.
Claims (5)
1. a kind of novel precondensation kettle includes that lower kettle supports successively from bottom to top using vertical structure, lower kettle, reducer,
Chuck bringing-up section and kettle cover, it is characterised in that the lower kettle, reducer and kettle cover are equipped with half coil pipe or honeycomb duct；Under described
If the built-in internals being made of dried layer annular column disk and bubble-cap of autoclave body.
2. novel precondensation kettle as described in claim 1, it is characterised in that the internals include polylith annular tower tray and one piece
Bubble-cap, annular tower tray of the polylith with inner cylinder and the annular tower tray of polylith cover plate are arranged alternately, and bubble-cap is placed in annular tower tray most
Upper end；The annular tower tray with inner cylinder is equipped with downflow weir.
3. novel precondensation kettle as claimed in claim 2, it is characterised in that the gas phase of the annular tower tray of the polylith cover plate
Space is gradually reduced from bottom to top.
4. novel precondensation kettle as described in claim 1, it is characterised in that the lower kettle lower end is equipped with feed inlet, reducer
Equipped with discharge port, kettle cover is equipped with outlet bend pipe.
5. novel precondensation kettle as described in claim 1, it is characterised in that precondensation kettle autoclave body flange is using lip weldering sealing knot
Structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810521993.5A CN108404846A (en) | 2018-05-28 | 2018-05-28 | Novel precondensation kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810521993.5A CN108404846A (en) | 2018-05-28 | 2018-05-28 | Novel precondensation kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108404846A true CN108404846A (en) | 2018-08-17 |
Family
ID=63140617
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810521993.5A Pending CN108404846A (en) | 2018-05-28 | 2018-05-28 | Novel precondensation kettle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108404846A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918042A (en) * | 2019-12-27 | 2020-03-27 | 上海聚友化工有限公司 | Pre-polycondensation reaction kettle |
| CN111423570A (en) * | 2020-05-20 | 2020-07-17 | 北京芯友工程技术有限公司 | Process method and device for continuously producing degradable polyester |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854178A (en) * | 1957-04-08 | 1960-11-16 | Black Sivalls & Bryson Inc | Apparatus for contacting a gas with a dehydrating liquid |
| CN2611005Y (en) * | 2003-03-11 | 2004-04-14 | 中国石化仪征化纤股份有限公司 | Tower |
| CN102516510A (en) * | 2011-12-22 | 2012-06-27 | 南京昊扬化工装备有限公司 | Dimple jacket-type prepolymerization vessel |
| CN208407005U (en) * | 2018-05-28 | 2019-01-22 | 南京昊扬化工装备有限公司 | Novel precondensation kettle |
-
2018
- 2018-05-28 CN CN201810521993.5A patent/CN108404846A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB854178A (en) * | 1957-04-08 | 1960-11-16 | Black Sivalls & Bryson Inc | Apparatus for contacting a gas with a dehydrating liquid |
| CN2611005Y (en) * | 2003-03-11 | 2004-04-14 | 中国石化仪征化纤股份有限公司 | Tower |
| CN102516510A (en) * | 2011-12-22 | 2012-06-27 | 南京昊扬化工装备有限公司 | Dimple jacket-type prepolymerization vessel |
| CN208407005U (en) * | 2018-05-28 | 2019-01-22 | 南京昊扬化工装备有限公司 | Novel precondensation kettle |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110918042A (en) * | 2019-12-27 | 2020-03-27 | 上海聚友化工有限公司 | Pre-polycondensation reaction kettle |
| CN111423570A (en) * | 2020-05-20 | 2020-07-17 | 北京芯友工程技术有限公司 | Process method and device for continuously producing degradable polyester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180817 |