CN202430151U - Honeycomb jacket type pre-polycondensation kettle - Google Patents
Honeycomb jacket type pre-polycondensation kettle Download PDFInfo
- Publication number
- CN202430151U CN202430151U CN2011205410108U CN201120541010U CN202430151U CN 202430151 U CN202430151 U CN 202430151U CN 2011205410108 U CN2011205410108 U CN 2011205410108U CN 201120541010 U CN201120541010 U CN 201120541010U CN 202430151 U CN202430151 U CN 202430151U
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- honeycomb
- polycondensation
- type pre
- jacket type
- welded
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Abstract
The utility model belongs to the technical field of chemical equipment, and relates a honeycomb jacket type pre-polycondensation kettle, in particular to first polycondensation of a low polymer in the production of PET (Polyethylene Terephthalate). The honeycomb jacket type pre-polycondensation kettle comprises an upper cylinder body, a lower cylinder body and jackets, wherein the upper cylinder body is different from the lower cylinder body in diameter. The honeycomb jacket type pre-polycondensation kettle is characterized in that honeycomb short tubes are welded on the outer walls of the cylinders. A heating cylinder adopts a welding structure that the honeycomb short tubes are welded with the jackets; and the closing positions of the upper ends and the lower ends of the jackets and the bottom parts of the honeycomb short tubes are welded on the outer walls of the cylinders. According to different process requirements, the square or diamond-shaped distribution manner and the axial and circumferential pitch of the honeycomb short tubes can be selected, so that the wall thicknesses of the cylinders and the jackets are economic and reasonable. The honeycomb jacket type pre-polycondensation kettle has the advantages that materials are always kept in a bottom-to-top plug flow state in the polycondensation process, the volume of equipment is small, and the efficiency of a reactor is high.
Description
Technical field
The utility model belongs to technical field of chemical, is a kind of honeycomb jacket formula precondensation still, specially refers to the polycondensation first time of oligopolymer in the PET production.
Background technology
The production of polyester is that esterification raw material terepthaloyl moietie (EG) and terephthalic acid (PTA) are cooperated in esterifier in certain proportion; Suitable in addition temperature, pressure condition; Thereby keep the enough time to accomplish esterification; Generate terephthalic acid terepthaloyl moietie vinegar (BHET), and then further the phthalic acid glycol ester that generates is done polycondensation and handle, generate polyethylene terephthalate.
Prepolymerization reaction requires under the high temperature about 290 ° of C, to carry out, and the precondensation still is to rely on high temperature heating agent in the chuck to heat up and be incubated.Owing to also have certain pressure in addition in the chuck, cause traditional precondensation still inner core housing wall thickness thicker like this.So not only equipment cost is higher, and energy loss is also comparatively serious.
Summary of the invention
The purpose of the utility model is to provide a kind of processing requirement that can satisfy in the production of polyester, can reduce the honeycomb jacket formula precondensation still of equipment cost again.
The precondensation still of the utility model is to send esterification step here oligopolymer, carries out the polycondensation first time, makes that the esterification yield of material reaches 99%～99.5%, the polymerization degree reaches n=15～28.
The main technical schemes of the utility model: honeycomb jacket formula precondensation still, agent structure comprises the upper and lower cylindrical shell and the chuck of different diameter, it is characterized in that being welded with on the cylinder body outer wall honeycomb short tube.
Usually, the honeycomb jacket formula precondensation still agent structure of the utility model is upper and lower cylindrical shell, chuck and honeycomb short tube by different diameter, compositions such as vessel flange.The heating cylindrical shell adopts the welded construction of honeycomb short tube and chuck welding, and upper and lower end closing in place of chuck all is welded on the outer wall of cylindrical shell with honeycomb short tube bottom.According to the difference of processing requirement, can select honeycomb short tube square or rhombohedral distribution mode with axially and circumferential pitch, make cylindrical shell and chuck wall thickness economy and rationally.This structure is strengthened the inner barrel of heating cylindrical shell and the strength and stiffness of chuck each other, has enlarged the WP and the operating temperature range that are suitable for.
Obtain heat after the oligopolymer of injection additive gets into the precondensation well heater, along with the rising of temperature, the terepthaloyl moietie steam output increases, and under differential pressure action, material gets into the precondensation still of the utility model.In the precondensation still, terepthaloyl moietie steam entrained liquids material rises, repeatedly a plurality of through the appropriate form slit, and further esterification and polycondensation also take place in the material thorough mixing, reach the gas-liquid separation section that material that reaction requires gets into the still top at last.Evaporating the water vapour that separates with liquid phase material in the precondensation still top gas-liquid separation section that bore enlarges with the terepthaloyl moietie steam; Isolated water vapour and terepthaloyl moietie steam get in the precondensation spray condenser through the gas phase pipeline; By cold cycle EG condensed and absorbed, the tail gas of incoagulability is extracted out by vacuum pump; The liquid phase material prepolymer gets into whole polycondensation vessel by the prepolymer pump delivery through the prepolymer strainer through transfer pipet.
The utility model honeycomb jacket formula precondensation still, rate of heat transfer is big, and vaporization efficiency is high, and in light weight, cost is low, and few, rational in infrastructure with heating agent or heating agent quantity of steam, helps reducing the long-time running cost of equipment.
The utility model is compared with traditional Prepolycondensating reactor, has advantage:
From the intensity angle, honeycomb jacket equipment greatly reduces chuck wall thickness and inner core wall thickness, and manufacturing cost reduces; From the heat transfer angle; The gap of honeycomb jacket is littler than the gap of common chuck, and circulation area is less, and fluid flow velocity in the chamber significantly increases; And a large amount of honeycombs plays a part flow-disturbing spare in chuck; Fluid constantly changes flow direction and velocity of flow when flowing through cellular site, form turbulent eddy current heat (cold) exchange is quickened, and increases heat-transfer effect greatly; The precondensation process remains material plug flow flow state from bottom to top, and equipment volume is little, and reactor efficiency is high.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment honeycomb jacket formula precondensation still; Fig. 2 is a present embodiment welding node synoptic diagram.
Among the figure, 1-flat head; 2-following jacket head; 3-lower shell; 4-honeycomb short tube; 5-following chuck; 6-inner cone end socket; 7-chuck awl end socket; 8-ear seat; 9-upward lower flanges and skirt weldering sealed structure; 10-upward chucks; 11-upper shell; 12-upward jacket heads; 13-upper cover; 14-polycondensate vapour outlet; 15-pre-polymerization internals that contract.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in detail.
Embodiment:Present embodiment honeycomb jacket formula precondensation still, agent structure comprise the upper shell 11, lower shell 3 of different diameter and go up chuck 10, chuck 5 down, and its principal feature is all to be welded with honeycomb short tube 4 on the outer wall of upper shell 11, lower shell 3.
Shown in accompanying drawing 2, the welded construction that the heating cylindrical shell adopts honeycomb short tube 4 and last chuck 10, following chuck 5 to weld, upper and lower end closing in place of chuck all is welded on the outer wall of upper shell 11, lower shell 3 with honeycomb short tube 4 bottoms.According to the difference of processing requirement, can select honeycomb short tube 4 squares or rhombohedral distribution mode and axially reach circumferential pitch.
Among the embodiment, upper shell 11 also is provided with polycondensate vapour outlet 14, upper cover 13 and last jacket head 12; Lower shell 3 also is provided with ear seat 8, chuck awl end socket 7, inner cone end socket 6, following jacket head 2, flat head 1 and precondensation internals 15; Be connected through last lower flange and skirt weldering sealed structure 9 between upper shell 11 and the lower shell 3.
The honeycomb jacket formula precondensation still of present embodiment; Upper shell 11, lower shell 3 two portions by different diameter are formed: lower shell 3 conversion zones have designed the tower tray of different structure parameter; Upper shell 11 is the gas-liquid separation section; Adopt compound separation bubble-cap and leave bigger gas-phase space, polycondensate vapour outlet 14 is arranged at the top.The heating agent chuck of upper and lower cylindrical shell all adopts the honeycomb short tube jacket structured.Major diameter annular channel gas membrane does not have whipped-up structure makes Prepolycondensating reactor possess the function of completion later stage esterification and polycondensation in early stage, for pipeline adds properties-correcting agent assurance is provided, and reaction efficiency is high.
Claims (4)
1. honeycomb jacket formula precondensation still, agent structure comprises the upper and lower cylindrical shell and the chuck of different diameter, it is characterized in that being welded with on the cylinder body outer wall honeycomb short tube.
2. precondensation still as claimed in claim 1 is characterized in that closing in place of chuck upper and lower end and honeycomb short tube bottom all are welded on the outer wall of cylindrical shell.
3. according to claim 1 or claim 2 precondensation still is characterized in that the honeycomb short tube is square profile.
4. according to claim 1 or claim 2 precondensation still is characterized in that the distribution that assumes diamond in shape of honeycomb short tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205410108U CN202430151U (en) | 2011-12-22 | 2011-12-22 | Honeycomb jacket type pre-polycondensation kettle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205410108U CN202430151U (en) | 2011-12-22 | 2011-12-22 | Honeycomb jacket type pre-polycondensation kettle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202430151U true CN202430151U (en) | 2012-09-12 |
Family
ID=46779616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205410108U Expired - Fee Related CN202430151U (en) | 2011-12-22 | 2011-12-22 | Honeycomb jacket type pre-polycondensation kettle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202430151U (en) |
-
2011
- 2011-12-22 CN CN2011205410108U patent/CN202430151U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120912 Termination date: 20151222 |
|
| EXPY | Termination of patent right or utility model |