CN212025234U - Device for preventing polymerization and scaling - Google Patents
Device for preventing polymerization and scaling Download PDFInfo
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- CN212025234U CN212025234U CN202020059930.5U CN202020059930U CN212025234U CN 212025234 U CN212025234 U CN 212025234U CN 202020059930 U CN202020059930 U CN 202020059930U CN 212025234 U CN212025234 U CN 212025234U
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- CN
- China
- Prior art keywords
- reaction kettle
- feeding pipe
- caprolactam
- static mixer
- collecting tank
- 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.)
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- 238000006116 polymerization reaction Methods 0.000 title claims abstract description 19
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 claims abstract description 76
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 64
- 238000006243 chemical reaction Methods 0.000 claims abstract description 62
- 239000004408 titanium dioxide Substances 0.000 claims abstract description 32
- 239000002253 acid Substances 0.000 claims abstract description 31
- 239000000155 melt Substances 0.000 claims abstract description 25
- 230000003068 static effect Effects 0.000 claims abstract description 24
- 239000007921 spray Substances 0.000 claims abstract description 22
- 150000001412 amines Chemical class 0.000 claims abstract description 21
- 238000003756 stirring Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 3
- 229920000642 polymer Polymers 0.000 claims 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 22
- 239000000463 material Substances 0.000 description 13
- 239000002994 raw material Substances 0.000 description 13
- 239000003607 modifier Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 8
- 239000000203 mixture Substances 0.000 description 6
- 239000000178 monomer Substances 0.000 description 5
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920006052 Chinlon® Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
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Abstract
The utility model provides a device for preventing polymerization and scaling, which comprises a preheater, a pre-polymerization tower, a steam condenser, a condensate collecting tank, a spray pump, a reaction kettle, a heat medium heat exchanger, a melt pump and a static mixer, wherein the pre-polymerization tower is communicated with the steam condenser which is connected with the condensate collecting tank, and the condensate collecting tank is connected with the pre-polymerization tower through the spray pump; the reaction kettle is provided with a caprolactam feeding pipe, an acid feeding pipe and a titanium dioxide feeding pipe, and the preheater is arranged on the caprolactam feeding pipe; the reaction kettle is connected with a melt pump, the melt pump is connected with a static mixer, and the static mixer is connected with a prepolymerization tower; an amine feeding pipe is arranged at the discharge end of the melt pump; and the heat medium heat exchanger is respectively connected with the reaction kettle and the static mixer. The utility model discloses the advantage: can effectively solve the scaling problem caused by uneven mixing and improve the quality of products.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a spinning equipment field, in particular to prevent device of polymerization scale deposit.
[ background of the invention ]
When the chinlon 6 polymerization slices are produced, prepolymerization and final polymerization are carried out through a polymerization tower. In order to improve the product quality of the polyamide-6 polymerized chips, a modifier, which mainly comprises acid, amine and titanium dioxide, needs to be added before entering a polymerization tower, and the modifier and a raw material (caprolactam) need to be fully and uniformly mixed and then enter a prepolymerization tower for full reaction.
At present, as shown in FIG. 1, the whole prepolymerization apparatus 100' comprises: the system comprises a preheater 1 ', a dynamic mixer 2', a prepolymerization tower 3 ', a steam condenser 4', a condensate collecting tank 5 'and a spray pump 6'; wherein, the preheater 1 'is connected with the dynamic mixer 2', and the dynamic mixer 2 'is connected with the prepolymerization tower 3'; the top of the prepolymerization tower 3 ' is connected with a condensate collecting tank 5 ' through a steam condenser 4 '; the condensed water collecting tank 5 ' is connected with the upper end of the prepolymerization tower 3 ' through a spray pump 6 '. During production, the modifier and the raw materials are divided into three strands of feeding materials, wherein one strand of the feeding materials comprises amine and acid which are directly conveyed into a dynamic mixer 2 ', one strand of titanium dioxide which is directly conveyed into the dynamic mixer 2', and the raw material (caprolactam) which is conveyed into a preheater 1 'for preheating is conveyed into the dynamic mixer 2' after being preheated; mixing the modifier and the raw materials by the dynamic mixer 2 ', pumping the mixture into a prepolymerization tower 3' for reaction, condensing monomer steam generated in the reaction process by a steam condenser 4 'to form condensed water, and collecting the condensed water into a condensed water collecting tank 5'; meanwhile, the condensed water in the condensed water collecting tank 5 ' is extracted by a spray pump 6 ', and is sprayed downwards from the top of the prepolymerization tower 3 '; the melt after the reaction is taken out from the bottom of the prepolymerization column 3'.
Since the existing apparatus 100 'uses only the dynamic mixer 2' to mix the modifier and the raw material, it is easy to cause uneven mixing of the modifier and the raw material; if the titanium dioxide and the caprolactam are mixed unevenly, the titanium dioxide and the caprolactam are condensed into large particles, scales are formed and adhered to the wall of the reaction kettle, more scales are adhered to the heating tubes along with the passage of time, the reaction temperature is further influenced, the heating temperature is uneven, and the quality of a final product is unstable; if the acid, the amine and the caprolactam are not uniformly mixed, the materials are also non-uniformly reacted, and the product quality is unstable; these two factors can degrade the quality of the product, especially at high throughput, thereby limiting throughput.
[ Utility model ] content
The to-be-solved technical problem of the utility model lies in providing a prevent device of polymerization scale deposit, only uses the dynamic mixer to mix modifier and raw materials among the solution prior art, leads to appearing modifier and the inhomogeneous condition of raw materials mixture very easily to and lead to the unstable problem of product quality.
The utility model discloses a realize like this: a device for preventing polymerization and scaling comprises a preheater, a prepolymerization tower, a steam condenser, a condensate collecting tank, a spray pump, a reaction kettle, a heat medium heat exchanger, a melt pump and a static mixer, wherein the top of the prepolymerization tower is communicated with the steam condenser, the steam condenser is connected with the condensate collecting tank, and the condensate collecting tank is connected with the upper end of the prepolymerization tower through the spray pump;
the reaction kettle is provided with a caprolactam feeding pipe, an acid feeding pipe and a titanium dioxide feeding pipe, and the preheater is arranged on the caprolactam feeding pipe; the discharge end of the reaction kettle is connected with the melt pump, the melt pump is connected with the feed end of the static mixer, and the discharge end of the static mixer is connected with the prepolymerization tower; an amine feeding pipe is arranged at the discharge end of the melt pump; and the heat medium heat exchanger is respectively connected with the reaction kettle and the static mixer.
Further, the top of the reaction kettle is communicated with the steam condenser.
Furthermore, the upper end of the reaction kettle is connected with the spray pump.
Further, a stirring device is arranged in the reaction kettle.
The utility model has the advantages that: the technical proposal of the utility model is that the titanium dioxide, the acid and the caprolactam are stirred by using the reaction kettle, which can ensure the sufficient mixing of the titanium dioxide, the acid and the caprolactam; then uniformly mixing the fully mixed titanium dioxide, acid and caprolactam with the input amine by using a static mixer; meanwhile, a heat medium is conveyed through a heat medium heat exchanger to preserve heat of the mixed materials. Therefore, through the technical scheme of the utility model, can effectively ensure titanium dioxide, acid, amine and caprolactam homogeneous mixing, make titanium dioxide, acid, amine and caprolactam carry out the abundant reaction in the prepolymerization tower to can effectively solve the scale deposit problem because of mixing inhomogeneous arouses, can effectively improve the quality of product.
[ description of the drawings ]
The invention will be further described with reference to the following examples with reference to the accompanying drawings.
FIG. 1 is a schematic view of the structure of an apparatus used in a conventional prepolymerization.
Fig. 2 is a schematic structural diagram of the device for preventing polymerization scaling of the present invention.
[ detailed description ] embodiments
The embodiment of the utility model provides a through providing a device for preventing polymerization scale deposit, solved and only used the dynamic mixer to mix modifier and raw materials among the prior art, lead to appearing modifier and the inhomogeneous condition of raw materials mixture very easily to and lead to the unstable technical problem of product quality, realized making modifier and raw materials homogeneous mixing, avoid producing the scale deposit at polymerization's in-process, and then improve product quality's technological effect.
The embodiment of the utility model provides an in technical scheme for solving above-mentioned problem, the general thinking is as follows: the existing dynamic mixer is replaced by a reaction kettle with a stirring device, acid, titanium dioxide and caprolactam are separately thrown into the reaction kettle, and the acid, the titanium dioxide and the caprolactam are fully stirred by the stirring device in the reaction kettle, so that the acid, the titanium dioxide and the caprolactam are fully mixed; then inputting amine at the discharge end of the melt pump, mixing the amine with the materials from the reaction kettle, and then sending the mixture into a static mixer for uniform mixing; and finally, pumping the uniformly mixed materials into a prepolymerization tower for reaction.
For better understanding of the above technical solutions, the following detailed descriptions will be provided in conjunction with the drawings and the detailed description of the embodiments.
Referring to fig. 2, the preferred embodiment of the apparatus 100 for preventing polymerization and scaling of the present invention, said apparatus 100 comprises a preheater 1, a pre-polymerization tower 2, a steam condenser 3, a condensate collecting tank 4, a spray pump 5, a reaction kettle 6, a heat medium heat exchanger 7, a melt pump 8 and a static mixer 9;
the top of the prepolymerization tower 2 is communicated with the steam condenser 3, the steam condenser 3 is connected with the condensed water collecting tank 4, and the condensed water collecting tank 4 is connected with the upper end of the prepolymerization tower 2 through the spray pump 5; in operation, when steam (containing monomer steam) generated by reaction in the prepolymerization tower 2 passes through the steam condenser 3, condensed water (namely monomer water) is formed and is collected in the condensed water collecting tank 4; meanwhile, the spray pump 5 extracts condensed water (i.e., spray water) from the condensed water collecting tank 4, and sprays the condensed water downward from the inner top of the prepolymerization tower 2.
A caprolactam feeding pipe 61, an acid feeding pipe 62 and a titanium dioxide feeding pipe 63 are arranged on the reaction kettle 6, and the preheater 1 is arranged on the caprolactam feeding pipe 61; the discharge end of the reaction kettle 6 is connected with the melt pump 8, the melt pump 8 is connected with the feed end of the static mixer 9, and the discharge end of the static mixer 9 is connected with the prepolymerization tower 2; an amine feeding pipe 81 is arranged at the discharge end of the melt pump 8; the heat medium heat exchanger 7 is respectively connected with the reaction kettle 6 and the static mixer 9. Wherein the caprolactam feed pipe 61 is used for feeding caprolactam (raw material) into the reaction kettle 6, and the preheater 1 is used for preheating caprolactam to be fed into the reaction kettle 6 by heating medium; the acid feeding pipe 62 is used for conveying acid into the reaction kettle 6; the titanium dioxide feeding pipe 63 is used for conveying titanium dioxide into the reaction kettle 6; the reaction kettle 6 is used for stirring input acid, titanium dioxide and caprolactam so as to fully mix the acid, the titanium dioxide and the caprolactam; the melt pump 8 is used for pumping the fully mixed melt into the static mixer 9; the amine feeding pipe 81 is used for inputting amine to the discharge end of the melt pump 8 so as to mix the amine and the melt coming out of the melt pump 8; the static mixer 9 is used for uniformly mixing the input materials; the heat medium heat exchanger 7 is used for conveying a heat medium to the reaction kettle 6 and the static mixer 9 so as to preserve the heat of the mixed materials in the reaction kettle 6 and the static mixer 9; the prepolymerization tower 2 is used for reacting the input mixed materials.
In this embodiment, the top of the reaction kettle 6 is communicated with the steam condenser 3, and is used for conveying steam (containing monomer steam) generated in the reaction kettle 6 to the steam condenser 3, so that the steam is condensed into condensed water (namely monomer water) by the steam condenser 3.
In this embodiment, the upper end of the reaction kettle 6 is connected to the spray pump 5, and is configured to pump the spray water to the inner top of the reaction kettle 6 through the spray pump 5, and spray the spray water downward from the inner top of the reaction kettle 6, so as to achieve the effect of maintaining pressure.
In this embodiment, the reaction kettle 6 is provided with a stirring device 64 inside, and during operation, the acid, titanium dioxide and caprolactam which are input through the stirring device 64 are stirred, so that the acid, titanium dioxide and caprolactam are fully mixed.
The working principle of the device 100 of the present invention is as follows:
before the modifier and the raw materials enter the prepolymerization tower 2 for reaction, firstly, feeding caprolactam, acid and titanium dioxide into the reaction kettle 6 in three strands; caprolactam is conveyed into the preheater 1 through the caprolactam feeding pipe 61 to be preheated, and then is fed into the reaction kettle 6; acid is directly pumped into the reaction kettle 6 through the acid feeding pipe 62; titanium dioxide is directly injected into the reaction kettle 6 through the titanium dioxide feeding pipe 63. Stirring the injected caprolactam, the acid and the titanium dioxide in a reaction kettle 6 through the stirring device 6 to fully mix the caprolactam, the acid and the titanium dioxide, feeding the mixed material into the melt pump 8, and feeding steam generated in the mixing process into the steam condenser 3 for condensation; meanwhile, a heat medium is conveyed to the reaction kettle 6 and the static mixer 9 through the heat medium heat exchanger 7 so as to preserve heat of mixed materials. Then, amine is input through the amine feed pipe 81 at the discharge end of the melt pump 8, and simultaneously, the materials mixed by the reaction kettle 6 and the input amine are sent into the prepolymerization tower 2 through the melt pump 8 for reaction, and the steam generated by the reaction also enters the steam condenser 3 for condensation. The condensed water generated by the condensation is collected in the condensed water collecting tank 4, and the condensed water is pumped into the reaction kettle 6 and the prepolymerization tower 2 by the spray pump 5 for spraying.
To sum up, the utility model discloses following beneficial effect has: the technical proposal of the utility model is that the titanium dioxide, the acid and the caprolactam are stirred by using the reaction kettle, which can ensure the sufficient mixing of the titanium dioxide, the acid and the caprolactam; then uniformly mixing the fully mixed titanium dioxide, acid and caprolactam with the input amine by using a static mixer; meanwhile, a heat medium is conveyed through a heat medium heat exchanger to preserve heat of the mixed materials. Therefore, through the technical scheme of the utility model, can effectively ensure titanium dioxide, acid, amine and caprolactam homogeneous mixing, make titanium dioxide, acid, amine and caprolactam carry out the abundant reaction in the prepolymerization tower to can effectively solve the scale deposit problem because of mixing inhomogeneous arouses, can effectively improve the quality of product.
Although specific embodiments of the present invention have been described, it will be understood by those skilled in the art that the specific embodiments described are illustrative only and are not limiting upon the scope of the invention, and that equivalent modifications and variations can be made by those skilled in the art without departing from the spirit of the invention, which is to be limited only by the claims appended hereto.
Claims (4)
1. A device for preventing polymerization and scaling comprises a preheater, a prepolymerization tower, a steam condenser, a condensate collecting tank and a spray pump, wherein the top of the prepolymerization tower is communicated with the steam condenser, the steam condenser is connected with the condensate collecting tank, and the condensate collecting tank is connected with the upper end of the prepolymerization tower through the spray pump; the method is characterized in that: the device also comprises a reaction kettle, a heat medium heat exchanger, a melt pump and a static mixer;
the reaction kettle is provided with a caprolactam feeding pipe, an acid feeding pipe and a titanium dioxide feeding pipe, and the preheater is arranged on the caprolactam feeding pipe; the discharge end of the reaction kettle is connected with the melt pump, the melt pump is connected with the feed end of the static mixer, and the discharge end of the static mixer is connected with the prepolymerization tower; an amine feeding pipe is arranged at the discharge end of the melt pump; and the heat medium heat exchanger is respectively connected with the reaction kettle and the static mixer.
2. The apparatus for preventing polymer fouling of claim 1, wherein: the top of the reaction kettle is communicated with the steam condenser.
3. The apparatus for preventing polymer fouling of claim 1, wherein: the upper end of the reaction kettle is connected with the spray pump.
4. The apparatus for preventing polymer fouling of claim 1, wherein: and a stirring device is arranged in the reaction kettle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020059930.5U CN212025234U (en) | 2020-01-13 | 2020-01-13 | Device for preventing polymerization and scaling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020059930.5U CN212025234U (en) | 2020-01-13 | 2020-01-13 | Device for preventing polymerization and scaling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212025234U true CN212025234U (en) | 2020-11-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020059930.5U Active CN212025234U (en) | 2020-01-13 | 2020-01-13 | Device for preventing polymerization and scaling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212025234U (en) |
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2020
- 2020-01-13 CN CN202020059930.5U patent/CN212025234U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: 301 Houcuo, Zhangliu Village, Jiangtian, Changle District, Fuzhou, 350200, Fujian Province Patentee after: Fujian Liheng Nylon Industry Co.,Ltd. Country or region after: China Address before: 350218 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE LIHENG POLYAMIDE TECHNOLOGY Co.,Ltd. Country or region before: China |