CN219855483U - Improve drying system of PPTA resin surface compactness - Google Patents
Improve drying system of PPTA resin surface compactness Download PDFInfo
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- CN219855483U CN219855483U CN202321044026.7U CN202321044026U CN219855483U CN 219855483 U CN219855483 U CN 219855483U CN 202321044026 U CN202321044026 U CN 202321044026U CN 219855483 U CN219855483 U CN 219855483U
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- Prior art keywords
- dryer
- primary
- pipeline
- drying system
- improving
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- 239000011347 resin Substances 0.000 title claims abstract description 45
- 229920005989 resin Polymers 0.000 title claims abstract description 45
- 238000001035 drying Methods 0.000 title claims abstract description 35
- 229920003366 poly(p-phenylene terephthalamide) Polymers 0.000 title claims abstract description 22
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 41
- 238000010438 heat treatment Methods 0.000 claims abstract description 31
- 239000007921 spray Substances 0.000 claims abstract description 31
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 12
- 239000006096 absorbing agent Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 7
- 238000009835 boiling Methods 0.000 claims description 3
- 239000008234 soft water Substances 0.000 claims description 3
- 239000008187 granular material Substances 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 abstract description 12
- 239000002245 particle Substances 0.000 abstract description 5
- 230000000694 effects Effects 0.000 abstract description 2
- 229920001451 polypropylene glycol Polymers 0.000 abstract 1
- 239000000047 product Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000018044 dehydration Effects 0.000 description 2
- 238000006297 dehydration reaction Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Abstract
The utility model discloses a drying system for improving the surface compactness of PPTA (poly (propylene glycol) resin, which comprises a feeder, a nitrogen drier, a primary drier, a secondary drier and a spray absorption tower, wherein a discharge port of the feeder and a feed port of the primary drier are arranged up and down correspondingly and are connected through a pipeline, the discharge port of the primary drier and the feed port of the secondary drier are arranged up and down correspondingly and are connected through a pipeline, a finished product resin storage bin is arranged at the discharge port of the secondary drier, exhaust pipelines are arranged at the tops of the primary drier and the secondary drier, and the exhaust pipelines are connected with an inlet of the spray absorption tower through an exhaust fan. According to the utility model, the primary drying is performed to complete 70% of drying workload, the drying efficiency is improved, the microwave selective heating characteristic is utilized, the secondary drying is performed by adopting the microwave dryer, and the surface and the inside of the resin particles are simultaneously heated at a lower drying temperature, so that the effect of improving the density of the resin surface is realized.
Description
Technical Field
The utility model belongs to the field of PPTA resin production, and particularly relates to a drying system for improving the surface compactness of PPTA resin.
Background
The PPTA resin is obtained through solution polycondensation, the solvent and byproducts of the synthesized resin blank are removed through a water washing procedure, and the water washed resin is dried after centrifugation or filter pressing dehydration to obtain the finished resin. In the resin drying process, PPTA resin is subjected to thermal shrinkage, and the traditional drying process adopts a heating mode from outside to inside, so that the surface density of finished resin particles is high, and when the resin is used in a spinning process, the resin is poor in solubility in sulfuric acid and uneven in dissolution.
Disclosure of Invention
The utility model aims at solving the problems in the background and provides a drying system for improving the surface compactness of PPTA resin.
In order to achieve the above purpose, the present utility model adopts the following scheme:
the utility model provides an improve drying system of PPTA resin surface compactness, including the feeder, the nitrogen gas desicator, the primary dryer, the secondary dryer, finished product resin storage storehouse and spray absorber, the feeder is equipped with wet resin feed inlet, the discharge gate of feeder and the feed inlet of primary dryer correspond from top to bottom and set up and link to each other through the pipeline, the discharge gate of primary dryer and the feed inlet of secondary dryer correspond from top to bottom and set up and link to each other through the pipeline, the discharge gate department of secondary dryer is equipped with finished product resin storage storehouse, the top of primary dryer and secondary dryer all is equipped with the exhaust duct, the exhaust duct passes through the air exhauster and links to each other with the import of spray absorber, be equipped with the spray pump on the outlet pipeline of spray absorber, thereby the export of spray pump links to each other through pipeline and the upper portion of spray absorber with the soft water that will spray absorber is sent into spray absorber upper portion as spray water, the nitrogen gas desicator links to each other through pipeline and primary dryer thereby provides the hot nitrogen gas that is used for drying PPTA resin granule to primary dryer.
Further, the outer walls of the primary dryer and the nitrogen dryer are respectively provided with a heating jacket, the top of the heating jacket is provided with a heating steam inlet pipeline, and the bottom of the heating jacket is provided with a condensed water discharge pipeline.
Further, a first steam pressure gauge and a first steam regulating valve are arranged on a heating steam inlet pipeline of the heating jacket of the primary dryer, a material temperature thermometer is arranged on the primary dryer, and the material temperature thermometer and the first steam regulating valve are controlled by adopting a single-loop PID.
Further, a second steam pressure gauge and a second steam regulating valve are arranged on a heating steam inlet pipeline of the heating jacket of the nitrogen dryer.
Further, a nitrogen flowmeter is arranged on an inlet pipeline of the nitrogen dryer.
Further, an exhaust pipeline thermometer is arranged on the exhaust pipeline of the primary dryer.
Further, the primary dryer is a fluidized bed boiling dryer or a paddle dryer.
Further, the secondary dryer is a tunnel microwave dryer.
The utility model has the following beneficial effects:
according to the utility model, first-stage drying is carried out, 70% of drying workload is completed, and the drying efficiency is improved. And the characteristic of selective heating of microwaves is utilized, a microwave dryer is adopted for secondary drying, and the surfaces and the interiors of the resin particles are heated at the same time at a lower drying temperature, so that the effect of improving the density of the surfaces of the resin is realized.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Reference numerals: 1. a feeder; 2. a primary dryer; 21. heating the steam inlet pipe; 211. a first vapor pressure gauge; 212. a first steam regulating valve; 22. a condensed water discharge pipe; 23. a material temperature thermometer; 24. an exhaust duct; 240. an exhaust duct thermometer; 3. a nitrogen drier; 31. an inlet duct; 310. a nitrogen flow meter; 32. heating the steam inlet pipe; 321. a second vapor pressure gauge; 322. a second steam regulating valve; 33. a condensed water discharge pipe; 4. a secondary dryer; 41. An exhaust duct; 5. a finished resin storage bin; 6. an exhaust fan; 7. spraying an absorption tower; 8. and a spray pump.
Detailed Description
The utility model is further described below with reference to the accompanying drawings.
Example 1
The utility model provides a improve drying system of PPTA resin surface compactness, as shown in FIG. 1, including feeder 1, primary dryer 2, nitrogen gas desicator 3, secondary dryer 4 and spray absorption tower 7, feeder 1 is equipped with wet resin feed inlet, the discharge gate of feeder 1 and the feed inlet of primary dryer 2 correspond from top to bottom and set up and pass through the pipe connection, the discharge gate of primary dryer 2 and the feed inlet of secondary dryer 4 correspond from top to bottom and set up and pass through the pipeline and link to each other, the discharge gate department of secondary dryer 4 is equipped with finished product resin storage bin 5, the top of primary dryer 2 is equipped with exhaust duct 24, be equipped with exhaust duct thermometer 240 on the exhaust duct 24. The top of the secondary dryer 4 is provided with an exhaust pipeline 41, the exhaust pipelines 24 and 41 are connected with the inlet of the spray absorption tower 7 through an exhaust fan 6, a spray pump 8 is arranged on the outlet pipeline of the spray absorption tower 7, the outlet of the spray pump 8 is connected with the upper part of the spray absorption tower 7 through a pipeline, soft water in the spray absorption tower 7 is sent into the upper part of the spray absorption tower 7 to serve as spray water, and the nitrogen dryer 3 is connected with the primary dryer 2 to provide hot nitrogen for drying PPTA resin particles for the primary dryer 2.
Wherein, be equipped with the heating jacket respectively on the outer wall of primary dryer 2 and nitrogen gas dryer 3, the top of primary dryer 2 heating jacket is equipped with heating steam inlet pipe 21, and the bottom of heating jacket is equipped with comdenstion water drain pipe 22. The heating steam inlet pipeline 21 is provided with a first steam pressure gauge 211 and a first steam regulating valve 212, the primary dryer 2 is provided with a material temperature thermometer 23, and the material temperature thermometer 23 and the first steam regulating valve 212 are controlled by adopting a single-loop PID.
The top of the heating jacket of the nitrogen dryer 3 is provided with a heating steam inlet pipeline 32, and the bottom of the heating jacket is provided with a condensed water discharge pipeline 33. A second steam pressure gauge 321 and a second steam regulating valve 322 are arranged on the heating steam inlet pipeline 32. The inlet pipe 31 of the nitrogen dryer 3 is provided with a nitrogen flow meter 310.
The primary dryer 2 is a fluidized bed boiling dryer or a paddle dryer, and the secondary dryer 4 is a tunnel microwave dryer.
When in use, wet resin with 60-75% of water content after centrifugal or filter pressing dehydration enters the primary dryer 2 through the quantitative feeder 1. Heating a jacket of the primary dryer by introducing 0.1MPa steam, wherein the temperature of the jacket is 80-150 ℃; and (3) introducing 80-150 ℃ hot nitrogen into the primary dryer to replace water vapor in the dryer to dry the PPTA resin particles. The replaced vapor contains trace organic solvent, and is required to be absorbed by the spray absorption tower 7 and then discharged. The rotation speed of the dryer and the opening of the discharge valve are regulated through frequency conversion, the primary drying time is controlled, and the water content of the material after the primary drying is required to be kept at 15% -20%; the discharge port of the primary dryer 2 is connected with the feed port of the secondary dryer 4 in a sealing flexible connection way, the secondary dryer 4 adopts a tunnel microwave dryer, the secondary drying temperature is 80-90 ℃, a moisture removing system of the secondary dryer 4 is connected with a spray absorption tower 7 for absorption and then is discharged, and the secondary drying time is controlled, so that the resin water content after secondary drying is lower than 5000ppm.
The caliber of a connecting pipeline between the discharge port of the feeder 1 and the feed port of the primary dryer 2 and the caliber of a connecting pipeline between the discharge port of the primary dryer 2 and the feed port of the secondary dryer 4 are all required to be more than DN 300.
Finally, it should be noted that: the above examples are provided for illustrating the technical solution of the present utility model and are not to be construed as limiting the present utility model, and it should be understood by those skilled in the art that any equivalent or obvious modification of the embodiments of the present utility model without changing the performance or use thereof without departing from the spirit of the present utility model is intended to be included in the scope of the present utility model as claimed.
Claims (8)
1. The utility model provides a improve drying system of PPTA resin surface compactness, a serial communication port, including the feeder, the nitrogen gas desicator, the primary dryer, the secondary dryer, finished product resin storage storehouse and spray absorber, the feeder is equipped with wet resin feed inlet, the discharge gate of feeder and the feed inlet of primary dryer correspond from top to bottom and set up and link to each other through the pipeline, the discharge gate of primary dryer and the feed inlet of secondary dryer correspond from top to bottom and link to each other through the pipeline, the discharge gate department of secondary dryer is equipped with finished product resin storage storehouse, the top of primary dryer and secondary dryer all is equipped with exhaust duct, exhaust duct links to each other through the import of air exhauster and spray absorber, be equipped with the spray pump on the outlet pipeline of spray absorber, thereby the export of spray pump links to each other through pipeline and spray absorber's upper portion and sends into spray absorber upper portion as spray water, thereby nitrogen gas desicator links to each other through pipeline and primary dryer and thereby provides the soft water that is used for drying PPTA resin granule to primary dryer.
2. The drying system for improving the surface compactness of the PPTA resin according to claim 1, wherein the outer walls of the primary dryer and the nitrogen dryer are respectively provided with a heating jacket, the top of the heating jacket is provided with a heating steam inlet pipeline, and the bottom of the heating jacket is provided with a condensed water discharge pipeline.
3. The drying system for improving the surface compactness of the PPTA resin according to claim 2, wherein a first steam pressure gauge and a first steam regulating valve are arranged on a heating steam inlet pipeline of a heating jacket of the primary dryer, a material temperature thermometer is arranged on the primary dryer, and the material temperature thermometer and the first steam regulating valve are controlled by adopting a single-loop PID.
4. The drying system for improving the surface compactness of the PPTA resin according to claim 2, wherein a second steam pressure gauge and a second steam regulating valve are arranged on a heating steam inlet pipeline of a heating jacket of the nitrogen dryer.
5. The drying system for improving the surface compactness of the PPTA resin according to claim 1, wherein a nitrogen flowmeter is arranged on an inlet pipeline of the nitrogen dryer.
6. The drying system for improving the surface compactness of PPTA resin according to claim 1, wherein an exhaust duct thermometer is provided on the exhaust duct of the primary dryer.
7. The drying system for improving surface compactness of PPTA resin according to claim 1, wherein the primary dryer is a fluidized bed boiling dryer or a paddle dryer.
8. The drying system for improving surface compactness of PPTA resin according to claim 1, wherein the secondary dryer is a tunnel microwave dryer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321044026.7U CN219855483U (en) | 2023-05-05 | 2023-05-05 | Improve drying system of PPTA resin surface compactness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321044026.7U CN219855483U (en) | 2023-05-05 | 2023-05-05 | Improve drying system of PPTA resin surface compactness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219855483U true CN219855483U (en) | 2023-10-20 |
Family
ID=88339109
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321044026.7U Active CN219855483U (en) | 2023-05-05 | 2023-05-05 | Improve drying system of PPTA resin surface compactness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219855483U (en) |
-
2023
- 2023-05-05 CN CN202321044026.7U patent/CN219855483U/en active Active
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